changing package name back

org_apg/src/org/thialfihar/android/apg/ApgService.java

@@ -0,0 +1,658 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Iterator;
+
+import org.thialfihar.android.apg.IApgService;
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.provider.KeyRings;
+import org.thialfihar.android.apg.provider.Keys;
+import org.thialfihar.android.apg.provider.UserIds;
+
+import android.content.ContentResolver;
+import android.content.Intent;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteQueryBuilder;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.util.Log;
+
+public class ApgService extends Service {
+    private final static String TAG = "ApgService";
+    public static final boolean LOCAL_LOGV = true;
+    public static final boolean LOCAL_LOGD = true;
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        if (LOCAL_LOGD)
+            Log.d(TAG, "bound");
+        return mBinder;
+    }
+
+    /** error status */
+    private static enum error {
+        ARGUMENTS_MISSING, APG_FAILURE, NO_MATCHING_SECRET_KEY, PRIVATE_KEY_PASSPHRASE_WRONG, PRIVATE_KEY_PASSPHRASE_MISSING;
+
+        public int shiftedOrdinal() {
+            return ordinal() + 100;
+        }
+    }
+
+    private static enum call {
+        encrypt_with_passphrase, encrypt_with_public_key, decrypt, get_keys
+    }
+
+    /** all arguments that can be passed by calling application */
+    public static enum arg {
+        MESSAGE, // message to encrypt or to decrypt
+        SYMMETRIC_PASSPHRASE, // key for symmetric en/decryption
+        PUBLIC_KEYS, // public keys for encryption
+        ENCRYPTION_ALGORYTHM, // encryption algorithm
+        HASH_ALGORYTHM, // hash algorithm
+        ARMORED_OUTPUT, // whether to armor output
+        FORCE_V3_SIGNATURE, // whether to force v3 signature
+        COMPRESSION, // what compression to use for encrypted output
+        SIGNATURE_KEY, // key for signing
+        PRIVATE_KEY_PASSPHRASE, // passphrase for encrypted private key
+        KEY_TYPE, // type of key (private or public)
+        BLOB, // blob passed
+    }
+
+    /** all things that might be returned */
+    private static enum ret {
+        ERRORS, // string array list with errors
+        WARNINGS, // string array list with warnings
+        ERROR, // numeric error
+        RESULT, // en-/decrypted
+        FINGERPRINTS, // fingerprints of keys
+        USER_IDS, // user ids
+    }
+
+    /** required arguments for each AIDL function */
+    private static final HashMap<String, HashSet<arg>> FUNCTIONS_REQUIRED_ARGS = new HashMap<String, HashSet<arg>>();
+    static {
+        HashSet<arg> args = new HashSet<arg>();
+        args.add(arg.SYMMETRIC_PASSPHRASE);
+        FUNCTIONS_REQUIRED_ARGS.put(call.encrypt_with_passphrase.name(), args);
+
+        args = new HashSet<arg>();
+        args.add(arg.PUBLIC_KEYS);
+        FUNCTIONS_REQUIRED_ARGS.put(call.encrypt_with_public_key.name(), args);
+
+        args = new HashSet<arg>();
+        FUNCTIONS_REQUIRED_ARGS.put(call.decrypt.name(), args);
+
+        args = new HashSet<arg>();
+        args.add(arg.KEY_TYPE);
+        FUNCTIONS_REQUIRED_ARGS.put(call.get_keys.name(), args);
+    }
+
+    /** optional arguments for each AIDL function */
+    private static final HashMap<String, HashSet<arg>> FUNCTIONS_OPTIONAL_ARGS = new HashMap<String, HashSet<arg>>();
+    static {
+        HashSet<arg> args = new HashSet<arg>();
+        args.add(arg.ENCRYPTION_ALGORYTHM);
+        args.add(arg.HASH_ALGORYTHM);
+        args.add(arg.ARMORED_OUTPUT);
+        args.add(arg.FORCE_V3_SIGNATURE);
+        args.add(arg.COMPRESSION);
+        args.add(arg.PRIVATE_KEY_PASSPHRASE);
+        args.add(arg.SIGNATURE_KEY);
+        args.add(arg.BLOB);
+        args.add(arg.MESSAGE);
+        FUNCTIONS_OPTIONAL_ARGS.put(call.encrypt_with_passphrase.name(), args);
+        FUNCTIONS_OPTIONAL_ARGS.put(call.encrypt_with_public_key.name(), args);
+
+        args = new HashSet<arg>();
+        args.add(arg.SYMMETRIC_PASSPHRASE);
+        args.add(arg.PUBLIC_KEYS);
+        args.add(arg.PRIVATE_KEY_PASSPHRASE);
+        args.add(arg.MESSAGE);
+        args.add(arg.BLOB);
+        FUNCTIONS_OPTIONAL_ARGS.put(call.decrypt.name(), args);
+    }
+
+    /** a map from ApgService parameters to function calls to get the default */
+    private static final HashMap<arg, String> FUNCTIONS_DEFAULTS = new HashMap<arg, String>();
+    static {
+        FUNCTIONS_DEFAULTS.put(arg.ENCRYPTION_ALGORYTHM, "getDefaultEncryptionAlgorithm");
+        FUNCTIONS_DEFAULTS.put(arg.HASH_ALGORYTHM, "getDefaultHashAlgorithm");
+        FUNCTIONS_DEFAULTS.put(arg.ARMORED_OUTPUT, "getDefaultAsciiArmour");
+        FUNCTIONS_DEFAULTS.put(arg.FORCE_V3_SIGNATURE, "getForceV3Signatures");
+        FUNCTIONS_DEFAULTS.put(arg.COMPRESSION, "getDefaultMessageCompression");
+    }
+
+    /** a map of the default function names to their method */
+    private static final HashMap<String, Method> FUNCTIONS_DEFAULTS_METHODS = new HashMap<String, Method>();
+    static {
+        try {
+            FUNCTIONS_DEFAULTS_METHODS.put("getDefaultEncryptionAlgorithm",
+                    Preferences.class.getMethod("getDefaultEncryptionAlgorithm"));
+            FUNCTIONS_DEFAULTS_METHODS.put("getDefaultHashAlgorithm",
+                    Preferences.class.getMethod("getDefaultHashAlgorithm"));
+            FUNCTIONS_DEFAULTS_METHODS.put("getDefaultAsciiArmour",
+                    Preferences.class.getMethod("getDefaultAsciiArmour"));
+            FUNCTIONS_DEFAULTS_METHODS.put("getForceV3Signatures",
+                    Preferences.class.getMethod("getForceV3Signatures"));
+            FUNCTIONS_DEFAULTS_METHODS.put("getDefaultMessageCompression",
+                    Preferences.class.getMethod("getDefaultMessageCompression"));
+        } catch (Exception e) {
+            Log.e(TAG, "Function method exception: " + e.getMessage());
+        }
+    }
+
+    private static void writeToOutputStream(InputStream is, OutputStream os) throws IOException {
+        byte[] buffer = new byte[8];
+        int len = 0;
+        while ((len = is.read(buffer)) != -1) {
+            os.write(buffer, 0, len);
+        }
+    }
+
+    private static Cursor getKeyEntries(HashMap<String, Object> pParams) {
+        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
+        qb.setTables(KeyRings.TABLE_NAME + " INNER JOIN " + Keys.TABLE_NAME + " ON " + "("
+                + KeyRings.TABLE_NAME + "." + KeyRings._ID + " = " + Keys.TABLE_NAME + "."
+                + Keys.KEY_RING_ID + " AND " + Keys.TABLE_NAME + "." + Keys.IS_MASTER_KEY
+                + " = '1'" + ") " + " INNER JOIN " + UserIds.TABLE_NAME + " ON " + "("
+                + Keys.TABLE_NAME + "." + Keys._ID + " = " + UserIds.TABLE_NAME + "."
+                + UserIds.KEY_ID + " AND " + UserIds.TABLE_NAME + "." + UserIds.RANK + " = '0') ");
+
+        String orderBy = pParams.containsKey("order_by") ? (String) pParams.get("order_by")
+                : UserIds.TABLE_NAME + "." + UserIds.USER_ID + " ASC";
+
+        String typeVal[] = null;
+        String typeWhere = null;
+        if (pParams.containsKey("key_type")) {
+            typeWhere = KeyRings.TABLE_NAME + "." + KeyRings.TYPE + " = ?";
+            typeVal = new String[] { "" + pParams.get("key_type") };
+        }
+        return qb.query(Apg.getDatabase().db(), (String[]) pParams.get("columns"), typeWhere,
+                typeVal, null, null, orderBy);
+    }
+
+    /**
+     * maps a fingerprint or user id of a key to a master key in database
+     * 
+     * @param search_key
+     *            fingerprint or user id to search for
+     * @return master key if found, or 0
+     */
+    private static long getMasterKey(String pSearchKey, Bundle pReturn) {
+        if (pSearchKey == null || pSearchKey.length() != 8) {
+            return 0;
+        }
+        ArrayList<String> keyList = new ArrayList<String>();
+        keyList.add(pSearchKey);
+        long[] keys = getMasterKey(keyList, pReturn);
+        if (keys.length > 0) {
+            return keys[0];
+        } else {
+            return 0;
+        }
+    }
+
+    /**
+     * maps fingerprints or user ids of keys to master keys in database
+     * 
+     * @param search_keys
+     *            a list of keys (fingerprints or user ids) to look for in database
+     * @return an array of master keys
+     */
+    private static long[] getMasterKey(ArrayList<String> pSearchKeys, Bundle pReturn) {
+
+        HashMap<String, Object> qParams = new HashMap<String, Object>();
+        qParams.put("columns", new String[] { KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID, // 0
+                UserIds.TABLE_NAME + "." + UserIds.USER_ID, // 1
+        });
+        qParams.put("key_type", Id.database.type_public);
+
+        Cursor mCursor = getKeyEntries(qParams);
+
+        if (LOCAL_LOGV)
+            Log.v(TAG, "going through installed user keys");
+        ArrayList<Long> masterKeys = new ArrayList<Long>();
+        while (mCursor.moveToNext()) {
+            long curMkey = mCursor.getLong(0);
+            String curUser = mCursor.getString(1);
+
+            String curFprint = Apg.getSmallFingerPrint(curMkey);
+            if (LOCAL_LOGV)
+                Log.v(TAG, "current user: " + curUser + " (" + curFprint + ")");
+            if (pSearchKeys.contains(curFprint) || pSearchKeys.contains(curUser)) {
+                if (LOCAL_LOGV)
+                    Log.v(TAG, "master key found for: " + curFprint);
+                masterKeys.add(curMkey);
+                pSearchKeys.remove(curFprint);
+            } else {
+                if (LOCAL_LOGV)
+                    Log.v(TAG, "Installed key " + curFprint
+                            + " is not in the list of public keys to encrypt with");
+            }
+        }
+        mCursor.close();
+
+        long[] masterKeyLongs = new long[masterKeys.size()];
+        int i = 0;
+        for (Long key : masterKeys) {
+            masterKeyLongs[i++] = key;
+        }
+
+        if (i == 0) {
+            Log.w(TAG, "Found not one public key");
+            pReturn.getStringArrayList(ret.WARNINGS.name()).add(
+                    "Searched for public key(s) but found not one");
+        }
+
+        for (String key : pSearchKeys) {
+            Log.w(TAG, "Searched for key " + key + " but cannot find it in APG");
+            pReturn.getStringArrayList(ret.WARNINGS.name()).add(
+                    "Searched for key " + key + " but cannot find it in APG");
+        }
+
+        return masterKeyLongs;
+    }
+
+    /**
+     * Add default arguments if missing
+     * 
+     * @param args
+     *            the bundle to add default parameters to if missing
+     */
+    private void addDefaultArguments(String pCall, Bundle pArgs) {
+        // check whether there are optional elements defined for that call
+        if (FUNCTIONS_OPTIONAL_ARGS.containsKey(pCall)) {
+            Preferences preferences = Preferences.getPreferences(getBaseContext(), true);
+
+            Iterator<arg> iter = FUNCTIONS_DEFAULTS.keySet().iterator();
+            while (iter.hasNext()) {
+                arg currentArg = iter.next();
+                String currentKey = currentArg.name();
+                if (!pArgs.containsKey(currentKey)
+                        && FUNCTIONS_OPTIONAL_ARGS.get(pCall).contains(currentArg)) {
+                    String currentFunctionName = FUNCTIONS_DEFAULTS.get(currentArg);
+                    try {
+                        Class<?> returnType = FUNCTIONS_DEFAULTS_METHODS.get(currentFunctionName)
+                                .getReturnType();
+                        if (returnType == String.class) {
+                            pArgs.putString(currentKey,
+                                    (String) FUNCTIONS_DEFAULTS_METHODS.get(currentFunctionName)
+                                            .invoke(preferences));
+                        } else if (returnType == boolean.class) {
+                            pArgs.putBoolean(currentKey,
+                                    (Boolean) FUNCTIONS_DEFAULTS_METHODS.get(currentFunctionName)
+                                            .invoke(preferences));
+                        } else if (returnType == int.class) {
+                            pArgs.putInt(currentKey,
+                                    (Integer) FUNCTIONS_DEFAULTS_METHODS.get(currentFunctionName)
+                                            .invoke(preferences));
+                        } else {
+                            Log.e(TAG, "Unknown return type " + returnType.toString()
+                                    + " for default option");
+                        }
+                    } catch (Exception e) {
+                        Log.e(TAG, "Exception in add_default_arguments " + e.getMessage());
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * updates a Bundle with default return values
+     * 
+     * @param pReturn
+     *            the Bundle to update
+     */
+    private void addDefaultReturns(Bundle pReturn) {
+        ArrayList<String> errors = new ArrayList<String>();
+        ArrayList<String> warnings = new ArrayList<String>();
+
+        pReturn.putStringArrayList(ret.ERRORS.name(), errors);
+        pReturn.putStringArrayList(ret.WARNINGS.name(), warnings);
+    }
+
+    /**
+     * checks for required arguments and adds them to the error if missing
+     * 
+     * @param function
+     *            the functions required arguments to check for
+     * @param pArgs
+     *            the Bundle of arguments to check
+     * @param pReturn
+     *            the bundle to write errors to
+     */
+    private void checkForRequiredArgs(String pFunction, Bundle pArgs, Bundle pReturn) {
+        if (FUNCTIONS_REQUIRED_ARGS.containsKey(pFunction)) {
+            Iterator<arg> iter = FUNCTIONS_REQUIRED_ARGS.get(pFunction).iterator();
+            while (iter.hasNext()) {
+                String curArg = iter.next().name();
+                if (!pArgs.containsKey(curArg)) {
+                    pReturn.getStringArrayList(ret.ERRORS.name())
+                            .add("Argument missing: " + curArg);
+                }
+            }
+        }
+
+        if (pFunction.equals(call.encrypt_with_passphrase.name())
+                || pFunction.equals(call.encrypt_with_public_key.name())
+                || pFunction.equals(call.decrypt.name())) {
+            // check that either MESSAGE or BLOB are there
+            if (!pArgs.containsKey(arg.MESSAGE.name()) && !pArgs.containsKey(arg.BLOB.name())) {
+                pReturn.getStringArrayList(ret.ERRORS.name()).add(
+                        "Arguments missing: Neither MESSAGE nor BLOG found");
+            }
+
+        }
+    }
+
+    /**
+     * checks for unknown arguments and add them to warning if found
+     * 
+     * @param function
+     *            the functions name to check against
+     * @param pArgs
+     *            the Bundle of arguments to check
+     * @param pReturn
+     *            the bundle to write warnings to
+     */
+    private void checkForUnknownArgs(String pFunction, Bundle pArgs, Bundle pReturn) {
+
+        HashSet<arg> allArgs = new HashSet<arg>();
+        if (FUNCTIONS_REQUIRED_ARGS.containsKey(pFunction)) {
+            allArgs.addAll(FUNCTIONS_REQUIRED_ARGS.get(pFunction));
+        }
+        if (FUNCTIONS_OPTIONAL_ARGS.containsKey(pFunction)) {
+            allArgs.addAll(FUNCTIONS_OPTIONAL_ARGS.get(pFunction));
+        }
+
+        ArrayList<String> unknownArgs = new ArrayList<String>();
+        Iterator<String> iter = pArgs.keySet().iterator();
+        while (iter.hasNext()) {
+            String curKey = iter.next();
+            try {
+                arg curArg = arg.valueOf(curKey);
+                if (!allArgs.contains(curArg)) {
+                    pReturn.getStringArrayList(ret.WARNINGS.name()).add(
+                            "Unknown argument: " + curKey);
+                    unknownArgs.add(curKey);
+                }
+            } catch (Exception e) {
+                pReturn.getStringArrayList(ret.WARNINGS.name()).add("Unknown argument: " + curKey);
+                unknownArgs.add(curKey);
+            }
+        }
+
+        // remove unknown arguments so our bundle has just what we need
+        for (String arg : unknownArgs) {
+            pArgs.remove(arg);
+        }
+    }
+
+    private boolean prepareArgs(String pCall, Bundle pArgs, Bundle pReturn) {
+        Apg.initialize(getBaseContext());
+
+        /* add default return values for all functions */
+        addDefaultReturns(pReturn);
+
+        /* add default arguments if missing */
+        addDefaultArguments(pCall, pArgs);
+        if (LOCAL_LOGV)
+            Log.v(TAG, "add_default_arguments");
+
+        /* check for required arguments */
+        checkForRequiredArgs(pCall, pArgs, pReturn);
+        if (LOCAL_LOGV)
+            Log.v(TAG, "check_required_args");
+
+        /* check for unknown arguments and add to warning if found */
+        checkForUnknownArgs(pCall, pArgs, pReturn);
+        if (LOCAL_LOGV)
+            Log.v(TAG, "check_unknown_args");
+
+        /* return if errors happened */
+        if (pReturn.getStringArrayList(ret.ERRORS.name()).size() != 0) {
+            if (LOCAL_LOGV)
+                Log.v(TAG, "Errors after preparing, not executing " + pCall);
+            pReturn.putInt(ret.ERROR.name(), error.ARGUMENTS_MISSING.shiftedOrdinal());
+            return false;
+        }
+        if (LOCAL_LOGV)
+            Log.v(TAG, "error return");
+
+        return true;
+    }
+
+    private boolean encrypt(Bundle pArgs, Bundle pReturn) {
+        boolean isBlob = pArgs.containsKey(arg.BLOB.name());
+
+        long pubMasterKeys[] = {};
+        if (pArgs.containsKey(arg.PUBLIC_KEYS.name())) {
+            ArrayList<String> list = pArgs.getStringArrayList(arg.PUBLIC_KEYS.name());
+            ArrayList<String> pubKeys = new ArrayList<String>();
+            if (LOCAL_LOGV)
+                Log.v(TAG, "Long size: " + list.size());
+            Iterator<String> iter = list.iterator();
+            while (iter.hasNext()) {
+                pubKeys.add(iter.next());
+            }
+            pubMasterKeys = getMasterKey(pubKeys, pReturn);
+        }
+
+        InputStream inStream = null;
+        if (isBlob) {
+            ContentResolver cr = getContentResolver();
+            try {
+                inStream = cr.openInputStream(Uri.parse(pArgs.getString(arg.BLOB.name())));
+            } catch (Exception e) {
+                Log.e(TAG, "... exception on opening blob", e);
+            }
+        } else {
+            inStream = new ByteArrayInputStream(pArgs.getString(arg.MESSAGE.name()).getBytes());
+        }
+        InputData in = new InputData(inStream, 0); // XXX Size second param?
+
+        OutputStream out = new ByteArrayOutputStream();
+        if (LOCAL_LOGV)
+            Log.v(TAG, "About to encrypt");
+        try {
+            Apg.encrypt(getBaseContext(), // context
+                    in, // input stream
+                    out, // output stream
+                    pArgs.getBoolean(arg.ARMORED_OUTPUT.name()), // ARMORED_OUTPUT
+                    pubMasterKeys, // encryption keys
+                    getMasterKey(pArgs.getString(arg.SIGNATURE_KEY.name()), pReturn), // signature
+                                                                                      // key
+                    pArgs.getString(arg.PRIVATE_KEY_PASSPHRASE.name()), // signature passphrase
+                    null, // progress
+                    pArgs.getInt(arg.ENCRYPTION_ALGORYTHM.name()), // encryption
+                    pArgs.getInt(arg.HASH_ALGORYTHM.name()), // hash
+                    pArgs.getInt(arg.COMPRESSION.name()), // compression
+                    pArgs.getBoolean(arg.FORCE_V3_SIGNATURE.name()), // mPreferences.getForceV3Signatures(),
+                    pArgs.getString(arg.SYMMETRIC_PASSPHRASE.name()) // passPhrase
+            );
+        } catch (Exception e) {
+            Log.e(TAG, "Exception in encrypt");
+            String msg = e.getMessage();
+            if (msg.equals(getBaseContext().getString(R.string.error_noSignaturePassPhrase))) {
+                pReturn.getStringArrayList(ret.ERRORS.name()).add(
+                        "Cannot encrypt (" + arg.PRIVATE_KEY_PASSPHRASE.name() + " missing): "
+                                + msg);
+                pReturn.putInt(ret.ERROR.name(),
+                        error.PRIVATE_KEY_PASSPHRASE_MISSING.shiftedOrdinal());
+            } else if (msg.equals(getBaseContext().getString(
+                    R.string.error_couldNotExtractPrivateKey))) {
+                pReturn.getStringArrayList(ret.ERRORS.name()).add(
+                        "Cannot encrypt (" + arg.PRIVATE_KEY_PASSPHRASE.name()
+                                + " probably wrong): " + msg);
+                pReturn.putInt(ret.ERROR.name(),
+                        error.PRIVATE_KEY_PASSPHRASE_WRONG.shiftedOrdinal());
+            } else {
+                pReturn.getStringArrayList(ret.ERRORS.name()).add(
+                        "Internal failure (" + e.getClass() + ") in APG when encrypting: "
+                                + e.getMessage());
+                pReturn.putInt(ret.ERROR.name(), error.APG_FAILURE.shiftedOrdinal());
+            }
+            return false;
+        }
+        if (LOCAL_LOGV)
+            Log.v(TAG, "Encrypted");
+        if (isBlob) {
+            ContentResolver cr = getContentResolver();
+            try {
+                OutputStream outStream = cr.openOutputStream(Uri.parse(pArgs.getString(arg.BLOB
+                        .name())));
+                writeToOutputStream(new ByteArrayInputStream(out.toString().getBytes()), outStream);
+                outStream.close();
+            } catch (Exception e) {
+                Log.e(TAG, "... exception on writing blob", e);
+            }
+        } else {
+            pReturn.putString(ret.RESULT.name(), out.toString());
+        }
+        return true;
+    }
+
+    private final IApgService.Stub mBinder = new IApgService.Stub() {
+
+        public boolean getKeys(Bundle pArgs, Bundle pReturn) {
+
+            prepareArgs("get_keys", pArgs, pReturn);
+
+            HashMap<String, Object> qParams = new HashMap<String, Object>();
+            qParams.put("columns", new String[] {
+                    KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID, // 0
+                    UserIds.TABLE_NAME + "." + UserIds.USER_ID, // 1
+            });
+
+            qParams.put("key_type", pArgs.getInt(arg.KEY_TYPE.name()));
+
+            Cursor cursor = getKeyEntries(qParams);
+            ArrayList<String> fPrints = new ArrayList<String>();
+            ArrayList<String> ids = new ArrayList<String>();
+            while (cursor.moveToNext()) {
+                if (LOCAL_LOGV)
+                    Log.v(TAG, "adding key " + Apg.getSmallFingerPrint(cursor.getLong(0)));
+                fPrints.add(Apg.getSmallFingerPrint(cursor.getLong(0)));
+                ids.add(cursor.getString(1));
+            }
+            cursor.close();
+
+            pReturn.putStringArrayList(ret.FINGERPRINTS.name(), fPrints);
+            pReturn.putStringArrayList(ret.USER_IDS.name(), ids);
+            return true;
+        }
+
+        public boolean encryptWithPublicKey(Bundle pArgs, Bundle pReturn) {
+            if (!prepareArgs("encrypt_with_public_key", pArgs, pReturn)) {
+                return false;
+            }
+
+            return encrypt(pArgs, pReturn);
+        }
+
+        public boolean encryptWithPassphrase(Bundle pArgs, Bundle pReturn) {
+            if (!prepareArgs("encrypt_with_passphrase", pArgs, pReturn)) {
+                return false;
+            }
+
+            return encrypt(pArgs, pReturn);
+
+        }
+
+        public boolean decrypt(Bundle pArgs, Bundle pReturn) {
+            if (!prepareArgs("decrypt", pArgs, pReturn)) {
+                return false;
+            }
+
+            boolean isBlob = pArgs.containsKey(arg.BLOB.name());
+
+            String passphrase = pArgs.getString(arg.SYMMETRIC_PASSPHRASE.name()) != null ? pArgs
+                    .getString(arg.SYMMETRIC_PASSPHRASE.name()) : pArgs
+                    .getString(arg.PRIVATE_KEY_PASSPHRASE.name());
+
+            InputStream inStream = null;
+            if (isBlob) {
+                ContentResolver cr = getContentResolver();
+                try {
+                    inStream = cr.openInputStream(Uri.parse(pArgs.getString(arg.BLOB.name())));
+                } catch (Exception e) {
+                    Log.e(TAG, "... exception on opening blob", e);
+                }
+            } else {
+                inStream = new ByteArrayInputStream(pArgs.getString(arg.MESSAGE.name()).getBytes());
+            }
+
+            InputData in = new InputData(inStream, 0); // XXX what size in second parameter?
+            OutputStream out = new ByteArrayOutputStream();
+            if (LOCAL_LOGV)
+                Log.v(TAG, "About to decrypt");
+            try {
+                Apg.decrypt(getBaseContext(), in, out, passphrase, null, // progress
+                        pArgs.getString(arg.SYMMETRIC_PASSPHRASE.name()) != null // symmetric
+                );
+            } catch (Exception e) {
+                Log.e(TAG, "Exception in decrypt");
+                String msg = e.getMessage();
+                if (msg.equals(getBaseContext().getString(R.string.error_noSecretKeyFound))) {
+                    pReturn.getStringArrayList(ret.ERRORS.name()).add("Cannot decrypt: " + msg);
+                    pReturn.putInt(ret.ERROR.name(), error.NO_MATCHING_SECRET_KEY.shiftedOrdinal());
+                } else if (msg.equals(getBaseContext().getString(R.string.error_wrongPassPhrase))) {
+                    pReturn.getStringArrayList(ret.ERRORS.name()).add(
+                            "Cannot decrypt (" + arg.PRIVATE_KEY_PASSPHRASE.name()
+                                    + " wrong/missing): " + msg);
+                    pReturn.putInt(ret.ERROR.name(),
+                            error.PRIVATE_KEY_PASSPHRASE_WRONG.shiftedOrdinal());
+                } else {
+                    pReturn.getStringArrayList(ret.ERRORS.name()).add(
+                            "Internal failure (" + e.getClass() + ") in APG when decrypting: "
+                                    + msg);
+                    pReturn.putInt(ret.ERROR.name(), error.APG_FAILURE.shiftedOrdinal());
+                }
+                return false;
+            }
+            if (LOCAL_LOGV)
+                Log.v(TAG, "... decrypted");
+
+            if (isBlob) {
+                ContentResolver cr = getContentResolver();
+                try {
+                    OutputStream outStream = cr.openOutputStream(Uri.parse(pArgs.getString(arg.BLOB
+                            .name())));
+                    writeToOutputStream(new ByteArrayInputStream(out.toString().getBytes()),
+                            outStream);
+                    outStream.close();
+                } catch (Exception e) {
+                    Log.e(TAG, "... exception on writing blob", e);
+                }
+            } else {
+                pReturn.putString(ret.RESULT.name(), out.toString());
+            }
+            return true;
+        }
+
+    };
+}

org_apg/src/org/thialfihar/android/apg/AskForSecretKeyPassPhrase.java

@@ -0,0 +1,139 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import org.spongycastle.jce.provider.BouncyCastleProvider;
+import org.spongycastle.openpgp.PGPException;
+import org.spongycastle.openpgp.PGPPrivateKey;
+import org.spongycastle.openpgp.PGPSecretKey;
+import org.thialfihar.android.apg.R;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.DialogInterface.OnClickListener;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.EditText;
+import android.widget.TextView;
+import android.widget.Toast;
+
+public class AskForSecretKeyPassPhrase {
+    public static interface PassPhraseCallbackInterface {
+        void passPhraseCallback(long keyId, String passPhrase);
+    }
+
+    public static Dialog createDialog(Activity context, long secretKeyId,
+            PassPhraseCallbackInterface callback) {
+        AlertDialog.Builder alert = new AlertDialog.Builder(context);
+
+        alert.setTitle(R.string.title_authentication);
+
+        final PGPSecretKey secretKey;
+        final Activity activity = context;
+
+        if (secretKeyId == Id.key.symmetric || secretKeyId == Id.key.none) {
+            secretKey = null;
+            alert.setMessage(context.getString(R.string.passPhraseForSymmetricEncryption));
+        } else {
+            secretKey = Apg.getMasterKey(Apg.getSecretKeyRing(secretKeyId));
+            if (secretKey == null) {
+                alert.setTitle(R.string.title_keyNotFound);
+                alert.setMessage(context.getString(R.string.keyNotFound, secretKeyId));
+                alert.setPositiveButton(android.R.string.ok, new OnClickListener() {
+                    public void onClick(DialogInterface dialog, int which) {
+                        activity.removeDialog(Id.dialog.pass_phrase);
+                    }
+                });
+                alert.setCancelable(false);
+                return alert.create();
+            }
+            String userId = Apg.getMainUserIdSafe(context, secretKey);
+            alert.setMessage(context.getString(R.string.passPhraseFor, userId));
+        }
+
+        LayoutInflater inflater = (LayoutInflater) context
+                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        View view = inflater.inflate(R.layout.passphrase, null);
+        final EditText input = (EditText) view.findViewById(R.id.passphrase_passphrase);
+
+        final TextView labelNotUsed = (TextView) view
+                .findViewById(R.id.passphrase_label_passphrase_again);
+        labelNotUsed.setVisibility(View.GONE);
+        final EditText inputNotUsed = (EditText) view
+                .findViewById(R.id.passphrase_passphrase_again);
+        inputNotUsed.setVisibility(View.GONE);
+
+        alert.setView(view);
+
+        final PassPhraseCallbackInterface cb = callback;
+        alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                activity.removeDialog(Id.dialog.pass_phrase);
+                String passPhrase = input.getText().toString();
+                long keyId;
+                if (secretKey != null) {
+                    try {
+                        PGPPrivateKey testKey = secretKey.extractPrivateKey(
+                                passPhrase.toCharArray(), new BouncyCastleProvider());
+                        if (testKey == null) {
+                            Toast.makeText(activity, R.string.error_couldNotExtractPrivateKey,
+                                    Toast.LENGTH_SHORT).show();
+                            return;
+                        }
+                    } catch (PGPException e) {
+                        Toast.makeText(activity, R.string.wrongPassPhrase, Toast.LENGTH_SHORT)
+                                .show();
+                        return;
+                    }
+                    keyId = secretKey.getKeyID();
+                } else {
+                    keyId = Id.key.symmetric;
+                }
+                cb.passPhraseCallback(keyId, passPhrase);
+            }
+        });
+
+        alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                activity.removeDialog(Id.dialog.pass_phrase);
+            }
+        });
+
+        // check if the key has no passphrase
+        if (secretKey != null) {
+            try {
+                Log.d("APG", "check if key has no passphrase...");
+                PGPPrivateKey testKey = secretKey.extractPrivateKey("".toCharArray(),
+                        new BouncyCastleProvider());
+                if (testKey != null) {
+                    Log.d("APG", "Key has no passphrase!");
+
+                    cb.passPhraseCallback(secretKey.getKeyID(), null);
+
+                    return null;
+                }
+            } catch (PGPException e) {
+
+            }
+        }
+        return alert.create();
+    }
+}

org_apg/src/org/thialfihar/android/apg/CachedPassPhrase.java

@@ -0,0 +1,62 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+public class CachedPassPhrase {
+    public final long timestamp;
+    public final String passPhrase;
+
+    public CachedPassPhrase(long timestamp, String passPhrase) {
+        super();
+        this.timestamp = timestamp;
+        this.passPhrase = passPhrase;
+    }
+
+    @Override
+    public int hashCode() {
+        int hc1 = (int) (this.timestamp & 0xffffffff);
+        int hc2 = (this.passPhrase == null ? 0 : this.passPhrase.hashCode());
+        return (hc1 + hc2) * hc2 + hc1;
+    }
+
+    @Override
+    public boolean equals(Object other) {
+        if (!(other instanceof CachedPassPhrase)) {
+            return false;
+        }
+
+        CachedPassPhrase o = (CachedPassPhrase) other;
+        if (timestamp != o.timestamp) {
+            return false;
+        }
+
+        if (passPhrase != o.passPhrase) {
+            if (passPhrase == null || o.passPhrase == null) {
+                return false;
+            }
+
+            if (!passPhrase.equals(o.passPhrase)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    @Override
+    public String toString() {
+        return "(" + timestamp + ", *******)";
+    }
+}

org_apg/src/org/thialfihar/android/apg/Constants.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import android.os.Environment;
+
+public final class Constants {
+
+    public static final String TAG = "APG";
+
+    public static final class path {
+        public static final String APP_DIR = Environment.getExternalStorageDirectory() + "/APG";
+    }
+
+    public static final class pref {
+        public static final String HAS_SEEN_HELP = "seenHelp";
+        public static final String HAS_SEEN_CHANGE_LOG = "seenChangeLogDialog";
+        public static final String DEFAULT_ENCRYPTION_ALGORITHM = "defaultEncryptionAlgorithm";
+        public static final String DEFAULT_HASH_ALGORITHM = "defaultHashAlgorithm";
+        public static final String DEFAULT_ASCII_ARMOUR = "defaultAsciiArmour";
+        public static final String DEFAULT_MESSAGE_COMPRESSION = "defaultMessageCompression";
+        public static final String DEFAULT_FILE_COMPRESSION = "defaultFileCompression";
+        public static final String PASS_PHRASE_CACHE_TTL = "passPhraseCacheTtl";
+        public static final String LANGUAGE = "language";
+        public static final String FORCE_V3_SIGNATURES = "forceV3Signatures";
+        public static final String KEY_SERVERS = "keyServers";
+    }
+
+    public static final class defaults {
+        public static final String KEY_SERVERS = "pool.sks-keyservers.net, subkeys.pgp.net, pgp.mit.edu";
+    }
+
+    public static final class extras {
+        public static final String PROGRESS = "progress";
+        public static final String PROGRESS_MAX = "max";
+        public static final String STATUS = "status";
+        public static final String MESSAGE = "message";
+        public static final String KEY_ID = "keyId";
+    }
+}

org_apg/src/org/thialfihar/android/apg/DataDestination.java

@@ -0,0 +1,95 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import java.io.ByteArrayOutputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.OutputStream;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg.GeneralException;
+
+import android.content.Context;
+import android.os.Environment;
+
+public class DataDestination {
+    private String mStreamFilename;
+    private String mFilename;
+    private int mMode = Id.mode.undefined;
+
+    public DataDestination() {
+
+    }
+
+    public void setMode(int mode) {
+        mMode = mode;
+    }
+
+    public void setFilename(String filename) {
+        mFilename = filename;
+    }
+
+    public String getStreamFilename() {
+        return mStreamFilename;
+    }
+
+    public OutputStream getOutputStream(Context context) throws Apg.GeneralException,
+            FileNotFoundException, IOException {
+        OutputStream out = null;
+        mStreamFilename = null;
+
+        switch (mMode) {
+        case Id.mode.stream: {
+            try {
+                while (true) {
+                    mStreamFilename = Apg.generateRandomString(32);
+                    if (mStreamFilename == null) {
+                        throw new Apg.GeneralException("couldn't generate random file name");
+                    }
+                    context.openFileInput(mStreamFilename).close();
+                }
+            } catch (FileNotFoundException e) {
+                // found a name that isn't used yet
+            }
+            out = context.openFileOutput(mStreamFilename, Context.MODE_PRIVATE);
+            break;
+        }
+
+        case Id.mode.byte_array: {
+            out = new ByteArrayOutputStream();
+            break;
+        }
+
+        case Id.mode.file: {
+            if (mFilename.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath())) {
+                if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
+                    throw new GeneralException(
+                            context.getString(R.string.error_externalStorageNotReady));
+                }
+            }
+            out = new FileOutputStream(mFilename);
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+
+        return out;
+    }
+}

org_apg/src/org/thialfihar/android/apg/DataSource.java

@@ -0,0 +1,118 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg.GeneralException;
+
+import android.content.Context;
+import android.net.Uri;
+import android.os.Environment;
+
+public class DataSource {
+    private Uri mContentUri = null;
+    private String mText = null;
+    private byte[] mData = null;
+
+    public DataSource() {
+
+    }
+
+    public void setUri(Uri uri) {
+        mContentUri = uri;
+        mText = null;
+        mData = null;
+    }
+
+    public void setUri(String uri) {
+        if (uri.startsWith("/")) {
+            setUri(Uri.parse("file://" + uri));
+        } else {
+            setUri(Uri.parse(uri));
+        }
+    }
+
+    public void setText(String text) {
+        mText = text;
+        mData = null;
+        mContentUri = null;
+    }
+
+    public void setData(byte[] data) {
+        mData = data;
+        mText = null;
+        mContentUri = null;
+    }
+
+    public boolean isText() {
+        return mText != null;
+    }
+
+    public boolean isBinary() {
+        return mData != null || mContentUri != null;
+    }
+
+    public InputData getInputData(Context context, boolean withSize) throws GeneralException,
+            FileNotFoundException, IOException {
+        InputStream in = null;
+        long size = 0;
+
+        if (mContentUri != null) {
+            if (mContentUri.getScheme().equals("file")) {
+                // get the rest after "file://"
+                String path = Uri.decode(mContentUri.toString().substring(7));
+                if (path.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath())) {
+                    if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
+                        throw new GeneralException(
+                                context.getString(R.string.error_externalStorageNotReady));
+                    }
+                }
+                in = new FileInputStream(path);
+                File file = new File(path);
+                if (withSize) {
+                    size = file.length();
+                }
+            } else {
+                in = context.getContentResolver().openInputStream(mContentUri);
+                if (withSize) {
+                    InputStream tmp = context.getContentResolver().openInputStream(mContentUri);
+                    size = Apg.getLengthOfStream(tmp);
+                    tmp.close();
+                }
+            }
+        } else if (mText != null || mData != null) {
+            byte[] bytes = null;
+            if (mData != null) {
+                bytes = mData;
+            } else {
+                bytes = mText.getBytes();
+            }
+            in = new ByteArrayInputStream(bytes);
+            if (withSize) {
+                size = bytes.length;
+            }
+        }
+
+        return new InputData(in, size);
+    }
+
+}

org_apg/src/org/thialfihar/android/apg/FileDialog.java

@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import org.thialfihar.android.apg.R;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.content.ActivityNotFoundException;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import android.widget.ImageButton;
+import android.widget.Toast;
+
+public class FileDialog {
+    private static EditText mFilename;
+    private static ImageButton mBrowse;
+    private static CheckBox mCheckBox;
+    private static Activity mActivity;
+    private static int mRequestCode;
+
+    public static interface OnClickListener {
+        public void onCancelClick();
+
+        public void onOkClick(String filename, boolean checkbox);
+    }
+
+    public static AlertDialog build(Activity activity, String title, String message,
+            String defaultFile, OnClickListener onClickListener, String fileManagerTitle,
+            String fileManagerButton, String checkboxText, int requestCode) {
+        // TODO: fileManagerTitle and fileManagerButton are deprecated, no use for them right now,
+        // but maybe the Intent now used will someday support them again, so leaving them in
+        LayoutInflater inflater = (LayoutInflater) activity
+                .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        AlertDialog.Builder alert = new AlertDialog.Builder(activity);
+
+        alert.setTitle(title);
+        alert.setMessage(message);
+
+        View view = inflater.inflate(R.layout.file_dialog, null);
+
+        mActivity = activity;
+        mFilename = (EditText) view.findViewById(R.id.input);
+        mFilename.setText(defaultFile);
+        mBrowse = (ImageButton) view.findViewById(R.id.btn_browse);
+        mBrowse.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                openFile();
+            }
+        });
+        mRequestCode = requestCode;
+        mCheckBox = (CheckBox) view.findViewById(R.id.checkbox);
+        if (checkboxText == null) {
+            mCheckBox.setEnabled(false);
+            mCheckBox.setVisibility(View.GONE);
+        } else {
+            mCheckBox.setEnabled(true);
+            mCheckBox.setVisibility(View.VISIBLE);
+            mCheckBox.setText(checkboxText);
+        }
+
+        alert.setView(view);
+
+        final OnClickListener clickListener = onClickListener;
+
+        alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                boolean checked = false;
+                if (mCheckBox.isEnabled()) {
+                    checked = mCheckBox.isChecked();
+                }
+                clickListener.onOkClick(mFilename.getText().toString(), checked);
+            }
+        });
+
+        alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+            public void onClick(DialogInterface dialog, int id) {
+                clickListener.onCancelClick();
+            }
+        });
+        return alert.create();
+    }
+
+    public static void setFilename(String filename) {
+        if (mFilename != null) {
+            mFilename.setText(filename);
+        }
+    }
+
+    /**
+     * Opens the file manager to select a file to open.
+     */
+    private static void openFile() {
+        String filename = mFilename.getText().toString();
+
+        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+        intent.addCategory(Intent.CATEGORY_OPENABLE);
+
+        intent.setData(Uri.parse("file://" + filename));
+        intent.setType("text/plain"); // only .asc or .gpg files
+
+        try {
+            mActivity.startActivityForResult(intent, mRequestCode);
+        } catch (ActivityNotFoundException e) {
+            // No compatible file manager was found.
+            Toast.makeText(mActivity, R.string.noFilemanagerInstalled, Toast.LENGTH_SHORT).show();
+        }
+    }
+}

org_apg/src/org/thialfihar/android/apg/HkpKeyServer.java

@@ -0,0 +1,256 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.UnsupportedEncodingException;
+import java.net.HttpURLConnection;
+import java.net.InetAddress;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLEncoder;
+import java.net.UnknownHostException;
+import java.util.ArrayList;
+import java.util.GregorianCalendar;
+import java.util.List;
+import java.util.Vector;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.apache.http.HttpEntity;
+import org.apache.http.HttpResponse;
+import org.apache.http.HttpStatus;
+import org.apache.http.NameValuePair;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.entity.UrlEncodedFormEntity;
+import org.apache.http.client.methods.HttpGet;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.message.BasicNameValuePair;
+import org.apache.http.util.EntityUtils;
+
+import android.text.Html;
+
+public class HkpKeyServer extends KeyServer {
+    private static class HttpError extends Exception {
+        private static final long serialVersionUID = 1718783705229428893L;
+        private int mCode;
+        private String mData;
+
+        public HttpError(int code, String data) {
+            super("" + code + ": " + data);
+            mCode = code;
+            mData = data;
+        }
+
+        public int getCode() {
+            return mCode;
+        }
+
+        public String getData() {
+            return mData;
+        }
+    }
+
+    private String mHost;
+    private short mPort = 11371;
+
+    // example:
+    // pub 2048R/<a href="/pks/lookup?op=get&search=0x887DF4BE9F5C9090">9F5C9090</a> 2009-08-17 <a
+    // href="/pks/lookup?op=vindex&search=0x887DF4BE9F5C9090">Jörg Runge
+    // &lt;joerg@joergrunge.de&gt;</a>
+    public static Pattern PUB_KEY_LINE = Pattern
+            .compile(
+                    "pub +([0-9]+)([a-z]+)/.*?0x([0-9a-z]+).*? +([0-9-]+) +(.+)[\n\r]+((?:    +.+[\n\r]+)*)",
+                    Pattern.CASE_INSENSITIVE);
+    public static Pattern USER_ID_LINE = Pattern.compile("^   +(.+)$", Pattern.MULTILINE
+            | Pattern.CASE_INSENSITIVE);
+
+    public HkpKeyServer(String host) {
+        mHost = host;
+    }
+
+    public HkpKeyServer(String host, short port) {
+        mHost = host;
+        mPort = port;
+    }
+
+    static private String readAll(InputStream in, String encoding) throws IOException {
+        ByteArrayOutputStream raw = new ByteArrayOutputStream();
+
+        byte buffer[] = new byte[1 << 16];
+        int n = 0;
+        while ((n = in.read(buffer)) != -1) {
+            raw.write(buffer, 0, n);
+        }
+
+        if (encoding == null) {
+            encoding = "utf8";
+        }
+        return raw.toString(encoding);
+    }
+
+    // TODO: replace this with httpclient
+    private String query(String request) throws QueryException, HttpError {
+        InetAddress ips[];
+        try {
+            ips = InetAddress.getAllByName(mHost);
+        } catch (UnknownHostException e) {
+            throw new QueryException(e.toString());
+        }
+        for (int i = 0; i < ips.length; ++i) {
+            try {
+                String url = "http://" + ips[i].getHostAddress() + ":" + mPort + request;
+                URL realUrl = new URL(url);
+                HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
+                conn.setConnectTimeout(5000);
+                conn.setReadTimeout(25000);
+                conn.connect();
+                int response = conn.getResponseCode();
+                if (response >= 200 && response < 300) {
+                    return readAll(conn.getInputStream(), conn.getContentEncoding());
+                } else {
+                    String data = readAll(conn.getErrorStream(), conn.getContentEncoding());
+                    throw new HttpError(response, data);
+                }
+            } catch (MalformedURLException e) {
+                // nothing to do, try next IP
+            } catch (IOException e) {
+                // nothing to do, try next IP
+            }
+        }
+
+        throw new QueryException("querying server(s) for '" + mHost + "' failed");
+    }
+
+    // TODO: replace this with httpclient
+    @Override
+    public List<KeyInfo> search(String query) throws QueryException, TooManyResponses,
+            InsufficientQuery {
+        Vector<KeyInfo> results = new Vector<KeyInfo>();
+
+        if (query.length() < 3) {
+            throw new InsufficientQuery();
+        }
+
+        String encodedQuery;
+        try {
+            encodedQuery = URLEncoder.encode(query, "utf8");
+        } catch (UnsupportedEncodingException e) {
+            return null;
+        }
+        String request = "/pks/lookup?op=index&search=" + encodedQuery;
+
+        String data = null;
+        try {
+            data = query(request);
+        } catch (HttpError e) {
+            if (e.getCode() == 404) {
+                return results;
+            } else {
+                if (e.getData().toLowerCase().contains("no keys found")) {
+                    return results;
+                } else if (e.getData().toLowerCase().contains("too many")) {
+                    throw new TooManyResponses();
+                } else if (e.getData().toLowerCase().contains("insufficient")) {
+                    throw new InsufficientQuery();
+                }
+            }
+            throw new QueryException("querying server(s) for '" + mHost + "' failed");
+        }
+
+        Matcher matcher = PUB_KEY_LINE.matcher(data);
+        while (matcher.find()) {
+            KeyInfo info = new KeyInfo();
+            info.size = Integer.parseInt(matcher.group(1));
+            info.algorithm = matcher.group(2);
+            info.keyId = Apg.keyFromHex(matcher.group(3));
+            info.fingerPrint = Apg.getSmallFingerPrint(info.keyId);
+            String chunks[] = matcher.group(4).split("-");
+            info.date = new GregorianCalendar(Integer.parseInt(chunks[0]),
+                    Integer.parseInt(chunks[1]), Integer.parseInt(chunks[2])).getTime();
+            info.userIds = new Vector<String>();
+            if (matcher.group(5).startsWith("*** KEY")) {
+                info.revoked = matcher.group(5);
+            } else {
+                String tmp = matcher.group(5).replaceAll("<.*?>", "");
+                tmp = Html.fromHtml(tmp).toString();
+                info.userIds.add(tmp);
+            }
+            if (matcher.group(6).length() > 0) {
+                Matcher matcher2 = USER_ID_LINE.matcher(matcher.group(6));
+                while (matcher2.find()) {
+                    String tmp = matcher2.group(1).replaceAll("<.*?>", "");
+                    tmp = Html.fromHtml(tmp).toString();
+                    info.userIds.add(tmp);
+                }
+            }
+            results.add(info);
+        }
+
+        return results;
+    }
+
+    @Override
+    public String get(long keyId) throws QueryException {
+        HttpClient client = new DefaultHttpClient();
+        try {
+            HttpGet get = new HttpGet("http://" + mHost + ":" + mPort
+                    + "/pks/lookup?op=get&search=0x" + Apg.keyToHex(keyId));
+
+            HttpResponse response = client.execute(get);
+            if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
+                throw new QueryException("not found");
+            }
+
+            HttpEntity entity = response.getEntity();
+            InputStream is = entity.getContent();
+            String data = readAll(is, EntityUtils.getContentCharSet(entity));
+            Matcher matcher = Apg.PGP_PUBLIC_KEY.matcher(data);
+            if (matcher.find()) {
+                return matcher.group(1);
+            }
+        } catch (IOException e) {
+            // nothing to do, better luck on the next keyserver
+        } finally {
+            client.getConnectionManager().shutdown();
+        }
+
+        return null;
+    }
+
+    @Override
+    void add(String armouredText) throws AddKeyException {
+        HttpClient client = new DefaultHttpClient();
+        try {
+            HttpPost post = new HttpPost("http://" + mHost + ":" + mPort + "/pks/add");
+
+            List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(2);
+            nameValuePairs.add(new BasicNameValuePair("keytext", armouredText));
+            post.setEntity(new UrlEncodedFormEntity(nameValuePairs));
+
+            HttpResponse response = client.execute(post);
+            if (response.getStatusLine().getStatusCode() != HttpStatus.SC_OK) {
+                throw new AddKeyException();
+            }
+        } catch (IOException e) {
+            // nothing to do, better luck on the next keyserver
+        } finally {
+            client.getConnectionManager().shutdown();
+        }
+    }
+}

org_apg/src/org/thialfihar/android/apg/IApgService.aidl

@@ -0,0 +1,125 @@
+package org.thialfihar.android.apg;
+
+interface IApgService {
+
+    /* All functions fill the returnVals Bundle with the following keys:
+     *
+     * ArrayList<String> "WARNINGS"  = Warnings, if any
+     * ArrayList<String> "ERRORS"    = Human readable error descriptions, if any
+     * int "ERROR"                   = Numeric representation of error, if any
+     *                                 starting with 100:
+     *                                  100: Required argument missing
+     *                                  101: Generic failure of APG
+     *                                  102: No matching private key found
+     *                                  103: Private key's passphrase wrong
+     *                                  104: Private key's passphrase missing
+     */
+
+    /* ********************************************************
+     * Encryption 
+     * ********************************************************/
+
+    /* All encryption function's arguments
+     *
+     * Bundle params' keys:
+     *  (optional/required) 
+     *      TYPE "STRING KEY" = EXPLANATION / VALUES
+     *
+     *  (required)
+     *      String  "MESSAGE"                   = Message to encrypt
+     *		OR
+     *		String 	"BLOB"						= ContentUri to a file handle
+     *											  with binary data to encrypt
+     *											  (Attention: file will be overwritten
+     *                                            with encrypted content!)
+     *      
+     *  (optional)
+     *      int     "ENCRYPTION_ALGORYTHM"      = Encryption Algorithm
+     *                                              7: AES-128, 8: AES-192, 9: AES-256, 
+     *                                              4: Blowfish, 10: Twofish, 3: CAST5,
+     *                                              6: DES, 2: Triple DES, 1: IDEA
+     *  (optional)
+     *      int     "HASH_ALGORYTHM"            = Hash Algorithm
+     *                                              1: MD5, 3: RIPEMD-160, 2: SHA-1,
+     *                                              11: SHA-224, 8: SHA-256, 9: SHA-384,
+     *                                              10: SHA-512
+     *  (optional)
+     *      Boolean "ARMORED_OUTPUT"            = Armor output
+     *      
+     *  (optional)
+     *      Boolean "FORCE_V3_SIGNATURE"        = Force V3 Signatures
+     *      
+     *  (optional)
+     *      int     "COMPRESSION"               = Compression to use
+     *                                              0x21070001: none, 1: Zip, 2: Zlib,
+     *                                              3: BZip2
+     *  (optional)
+     *      String  "SIGNATURE_KEY"             = Key to sign with
+     *      
+     *  (optional)
+     *      String  "PRIVATE_KEY_PASSPHRASE"    = Passphrase for signing key
+     *
+     * Bundle returnVals (in addition to the ERRORS/WARNINGS above):
+	 *      If "MESSAGE" was set:
+     *      	String  "RESULT"                    = Encrypted message
+     */
+
+     /* Additional argument for function below:
+     *  (required)
+     *      String  "SYMMETRIC_PASSPHRASE"      = Symmetric passphrase to use
+     */
+    boolean encryptWithPassphrase(in Bundle params, out Bundle returnVals);
+
+    /* Additional argument:
+     *  (required)
+     *      ArrayList<String>   "PUBLIC_KEYS"   = Public keys (8char fingerprint "123ABC12" OR 
+     *                                              complete id "Alice Meyer <ab@email.com>")
+     */
+    boolean encryptWithPublicKey(in Bundle params, out Bundle returnVals);
+
+    /* ********************************************************
+     * Decryption
+     * ********************************************************/
+
+    /* Bundle params:
+     *  (required) 
+     *      String  "MESSAGE"                   = Message to dencrypt
+     *		OR
+     *		String 	"BLOB"						= ContentUri to a file handle
+     *											  with binary data to dencrypt
+     *											  (Attention: file will be overwritten
+     *                                            with dencrypted content!)
+     *      
+     *  (optional)
+     *      String  "SYMMETRIC_PASSPHRASE"      = Symmetric passphrase for decryption
+     *      
+     *  (optional)
+     *      String  "PRIVATE_KEY_PASSPHRASE"    = Private keys's passphrase on asymmetric encryption
+     *
+     * Bundle return_vals:
+	 *      If "MESSAGE" was set:
+     *          String     "RESULT"             = Decrypted message
+     */
+    boolean decrypt(in Bundle params, out Bundle returnVals);
+ 
+    /* ********************************************************
+     * Get key information 
+     * ********************************************************/
+
+    /* Get info about all available keys
+     * 
+     * Bundle params:
+     *  (required)
+     *      int "KEY_TYPE"                      = info about what type of keys to return
+     *                                              0: public keys
+     *                                              1: private keys
+     *      
+     *  Returns:
+     *      StringArrayList "FINGERPRINTS"      = Short fingerprints of keys
+     *      
+     *      StringArrayList "USER_IDS"          = User ids of corresponding fingerprints
+     *                                            (order is the same as in FINGERPRINTS)
+     */
+    boolean getKeys(in Bundle params, out Bundle returnVals);
+
+}

org_apg/src/org/thialfihar/android/apg/Id.java

@@ -0,0 +1,193 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import org.spongycastle.bcpg.CompressionAlgorithmTags;
+
+public final class Id {
+
+    public static final String TAG = "APG";
+
+    public static final class menu {
+        public static final int export = 0x21070001;
+        public static final int delete = 0x21070002;
+        public static final int edit = 0x21070003;
+        public static final int update = 0x21070004;
+        public static final int exportToServer = 0x21070005;
+        public static final int share = 0x21070006;
+        public static final int signKey = 0x21070007;
+
+        public static final class option {
+            public static final int new_pass_phrase = 0x21070001;
+            public static final int create = 0x21070002;
+            public static final int about = 0x21070003;
+            public static final int manage_public_keys = 0x21070004;
+            public static final int manage_secret_keys = 0x21070005;
+            public static final int import_keys = 0x21070006;
+            public static final int export_keys = 0x21070007;
+            public static final int preferences = 0x21070008;
+            public static final int search = 0x21070009;
+            public static final int help = 0x21070010;
+            public static final int key_server = 0x21070011;
+            public static final int scanQRCode = 0x21070012;
+            public static final int encrypt = 0x21070013;
+            public static final int encrypt_to_clipboard = 0x21070014;
+            public static final int decrypt = 0x21070015;
+            public static final int reply = 0x21070016;
+            public static final int cancel = 0x21070017;
+            public static final int save = 0x21070018;
+            public static final int okay = 0x21070019;
+
+        }
+    }
+
+    public static final class message {
+        public static final int progress_update = 0x21070001;
+        public static final int done = 0x21070002;
+        public static final int import_keys = 0x21070003;
+        public static final int export_keys = 0x21070004;
+        public static final int import_done = 0x21070005;
+        public static final int export_done = 0x21070006;
+        public static final int create_key = 0x21070007;
+        public static final int edit_key = 0x21070008;
+        public static final int delete_done = 0x21070009;
+        public static final int query_done = 0x21070010;
+        public static final int unknown_signature_key = 0x21070011;
+    }
+
+    public static final class request {
+        public static final int public_keys = 0x21070001;
+        public static final int secret_keys = 0x21070002;
+        public static final int filename = 0x21070003;
+        public static final int output_filename = 0x21070004;
+        public static final int key_server_preference = 0x21070005;
+        public static final int look_up_key_id = 0x21070006;
+        public static final int export_to_server = 0x21070007;
+        public static final int import_from_qr_code = 0x21070008;
+        public static final int sign_key = 0x21070009;
+    }
+
+    public static final class dialog {
+        public static final int pass_phrase = 0x21070001;
+        public static final int encrypting = 0x21070002;
+        public static final int decrypting = 0x21070003;
+        public static final int new_pass_phrase = 0x21070004;
+        public static final int pass_phrases_do_not_match = 0x21070005;
+        public static final int no_pass_phrase = 0x21070006;
+        public static final int saving = 0x21070007;
+        public static final int delete_key = 0x21070008;
+        public static final int import_keys = 0x21070009;
+        public static final int importing = 0x2107000a;
+        public static final int export_key = 0x2107000b;
+        public static final int export_keys = 0x2107000c;
+        public static final int exporting = 0x2107000d;
+        public static final int new_account = 0x2107000e;
+        // public static final int about = 0x2107000f;
+        public static final int change_log = 0x21070010;
+        public static final int output_filename = 0x21070011;
+        public static final int delete_file = 0x21070012;
+        public static final int deleting = 0x21070013;
+        public static final int help = 0x21070014;
+        public static final int querying = 0x21070015;
+        public static final int lookup_unknown_key = 0x21070016;
+        public static final int signing = 0x21070017;
+    }
+
+    public static final class task {
+        public static final int import_keys = 0x21070001;
+        public static final int export_keys = 0x21070002;
+    }
+
+    public static final class database {
+        public static final int type_public = 0;
+        public static final int type_secret = 1;
+    }
+
+    public static final class type {
+        public static final int public_key = 0x21070001;
+        public static final int secret_key = 0x21070002;
+        public static final int user_id = 0x21070003;
+        public static final int key = 0x21070004;
+    }
+
+    public static final class choice {
+        public static final class algorithm {
+            public static final int dsa = 0x21070001;
+            public static final int elgamal = 0x21070002;
+            public static final int rsa = 0x21070003;
+        }
+
+        public static final class compression {
+            public static final int none = 0x21070001;
+            public static final int zlib = CompressionAlgorithmTags.ZLIB;
+            public static final int bzip2 = CompressionAlgorithmTags.BZIP2;
+            public static final int zip = CompressionAlgorithmTags.ZIP;
+        }
+
+        public static final class usage {
+            public static final int sign_only = 0x21070001;
+            public static final int encrypt_only = 0x21070002;
+            public static final int sign_and_encrypt = 0x21070003;
+        }
+
+        public static final class action {
+            public static final int encrypt = 0x21070001;
+            public static final int decrypt = 0x21070002;
+            public static final int import_public = 0x21070003;
+            public static final int import_secret = 0x21070004;
+        }
+    }
+
+    public static final class return_value {
+        public static final int ok = 0;
+        public static final int error = -1;
+        public static final int no_master_key = -2;
+        public static final int updated = 1;
+        public static final int bad = -3;
+    }
+
+    public static final class target {
+        public static final int clipboard = 0x21070001;
+        public static final int email = 0x21070002;
+        public static final int file = 0x21070003;
+        public static final int message = 0x21070004;
+    }
+
+    public static final class mode {
+        public static final int undefined = 0x21070001;
+        public static final int byte_array = 0x21070002;
+        public static final int file = 0x21070003;
+        public static final int stream = 0x21070004;
+    }
+
+    public static final class key {
+        public static final int none = 0;
+        public static final int symmetric = -1;
+    }
+
+    public static final class content {
+        public static final int unknown = 0;
+        public static final int encrypted_data = 1;
+        public static final int keys = 2;
+    }
+
+    public static final class keyserver {
+        public static final int search = 0x21070001;
+        public static final int get = 0x21070002;
+        public static final int add = 0x21070003;
+    }
+}

org_apg/src/org/thialfihar/android/apg/InputData.java

@@ -0,0 +1,39 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import java.io.InputStream;
+
+public class InputData {
+    private PositionAwareInputStream mInputStream;
+    private long mSize;
+
+    public InputData(InputStream inputStream, long size) {
+        mInputStream = new PositionAwareInputStream(inputStream);
+        mSize = size;
+    }
+
+    public InputStream getInputStream() {
+        return mInputStream;
+    }
+
+    public long getSize() {
+        return mSize;
+    }
+
+    public long getStreamPosition() {
+        return mInputStream.position();
+    }
+}

org_apg/src/org/thialfihar/android/apg/KeyServer.java

@@ -0,0 +1,60 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import java.io.Serializable;
+import java.util.Date;
+import java.util.List;
+import java.util.Vector;
+
+public abstract class KeyServer {
+    static public class QueryException extends Exception {
+        private static final long serialVersionUID = 2703768928624654512L;
+
+        public QueryException(String message) {
+            super(message);
+        }
+    }
+
+    static public class TooManyResponses extends Exception {
+        private static final long serialVersionUID = 2703768928624654513L;
+    }
+
+    static public class InsufficientQuery extends Exception {
+        private static final long serialVersionUID = 2703768928624654514L;
+    }
+
+    static public class AddKeyException extends Exception {
+        private static final long serialVersionUID = -507574859137295530L;
+    }
+
+    static public class KeyInfo implements Serializable {
+        private static final long serialVersionUID = -7797972113284992662L;
+        public Vector<String> userIds;
+        public String revoked;
+        public Date date;
+        public String fingerPrint;
+        public long keyId;
+        public int size;
+        public String algorithm;
+    }
+
+    abstract List<KeyInfo> search(String query) throws QueryException, TooManyResponses,
+            InsufficientQuery;
+
+    abstract String get(long keyId) throws QueryException;
+
+    abstract void add(String armouredText) throws AddKeyException;
+}

org_apg/src/org/thialfihar/android/apg/PausableThread.java

@@ -0,0 +1,49 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+public class PausableThread extends Thread {
+    private boolean mPaused = false;
+
+    public PausableThread(Runnable runnable) {
+        super(runnable);
+    }
+
+    public void pause() {
+        synchronized (this) {
+            mPaused = true;
+            while (mPaused) {
+                try {
+                    wait();
+                } catch (InterruptedException e) {
+                    // ignore
+                }
+            }
+        }
+    }
+
+    public void unpause() {
+        synchronized (this) {
+            mPaused = false;
+            notify();
+        }
+    }
+
+    public boolean isPaused() {
+        synchronized (this) {
+            return mPaused;
+        }
+    }
+}

org_apg/src/org/thialfihar/android/apg/PositionAwareInputStream.java

@@ -0,0 +1,81 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+public class PositionAwareInputStream extends InputStream {
+    private InputStream mStream;
+    private long mPosition;
+
+    public PositionAwareInputStream(InputStream in) {
+        mStream = in;
+        mPosition = 0;
+    }
+
+    @Override
+    public int read() throws IOException {
+        int ch = mStream.read();
+        ++mPosition;
+        return ch;
+    }
+
+    @Override
+    public int available() throws IOException {
+        return mStream.available();
+    }
+
+    @Override
+    public void close() throws IOException {
+        mStream.close();
+    }
+
+    @Override
+    public boolean markSupported() {
+        return false;
+    }
+
+    @Override
+    public int read(byte[] b) throws IOException {
+        int result = mStream.read(b);
+        mPosition += result;
+        return result;
+    }
+
+    @Override
+    public int read(byte[] b, int offset, int length) throws IOException {
+        int result = mStream.read(b, offset, length);
+        mPosition += result;
+        return result;
+    }
+
+    @Override
+    public synchronized void reset() throws IOException {
+        mStream.reset();
+        mPosition = 0;
+    }
+
+    @Override
+    public long skip(long n) throws IOException {
+        long result = mStream.skip(n);
+        mPosition += result;
+        return result;
+    }
+
+    public long position() {
+        return mPosition;
+    }
+}

org_apg/src/org/thialfihar/android/apg/Preferences.java

@@ -0,0 +1,184 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import org.spongycastle.bcpg.HashAlgorithmTags;
+import org.spongycastle.openpgp.PGPEncryptedData;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+
+import java.util.Vector;
+
+public class Preferences {
+    private static Preferences mPreferences;
+    private SharedPreferences mSharedPreferences;
+
+    public static synchronized Preferences getPreferences(Context context) {
+        return getPreferences(context, false);
+    }
+
+    public static synchronized Preferences getPreferences(Context context, boolean force_new) {
+        if (mPreferences == null || force_new) {
+            mPreferences = new Preferences(context);
+        }
+        return mPreferences;
+    }
+
+    private Preferences(Context context) {
+        mSharedPreferences = context.getSharedPreferences("APG.main", Context.MODE_PRIVATE);
+    }
+
+    public String getLanguage() {
+        return mSharedPreferences.getString(Constants.pref.LANGUAGE, "");
+    }
+
+    public void setLanguage(String value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putString(Constants.pref.LANGUAGE, value);
+        editor.commit();
+    }
+
+    public int getPassPhraseCacheTtl() {
+        int ttl = mSharedPreferences.getInt(Constants.pref.PASS_PHRASE_CACHE_TTL, 180);
+        // fix the value if it was set to "never" in previous versions, which currently is not
+        // supported
+        if (ttl == 0) {
+            ttl = 180;
+        }
+        return ttl;
+    }
+
+    public void setPassPhraseCacheTtl(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.pref.PASS_PHRASE_CACHE_TTL, value);
+        editor.commit();
+    }
+
+    public int getDefaultEncryptionAlgorithm() {
+        return mSharedPreferences.getInt(Constants.pref.DEFAULT_ENCRYPTION_ALGORITHM,
+                PGPEncryptedData.AES_256);
+    }
+
+    public void setDefaultEncryptionAlgorithm(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.pref.DEFAULT_ENCRYPTION_ALGORITHM, value);
+        editor.commit();
+    }
+
+    public int getDefaultHashAlgorithm() {
+        return mSharedPreferences.getInt(Constants.pref.DEFAULT_HASH_ALGORITHM,
+                HashAlgorithmTags.SHA256);
+    }
+
+    public void setDefaultHashAlgorithm(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.pref.DEFAULT_HASH_ALGORITHM, value);
+        editor.commit();
+    }
+
+    public int getDefaultMessageCompression() {
+        return mSharedPreferences.getInt(Constants.pref.DEFAULT_MESSAGE_COMPRESSION,
+                Id.choice.compression.zlib);
+    }
+
+    public void setDefaultMessageCompression(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.pref.DEFAULT_MESSAGE_COMPRESSION, value);
+        editor.commit();
+    }
+
+    public int getDefaultFileCompression() {
+        return mSharedPreferences.getInt(Constants.pref.DEFAULT_FILE_COMPRESSION,
+                Id.choice.compression.none);
+    }
+
+    public void setDefaultFileCompression(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.pref.DEFAULT_FILE_COMPRESSION, value);
+        editor.commit();
+    }
+
+    public boolean getDefaultAsciiArmour() {
+        return mSharedPreferences.getBoolean(Constants.pref.DEFAULT_ASCII_ARMOUR, false);
+    }
+
+    public void setDefaultAsciiArmour(boolean value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putBoolean(Constants.pref.DEFAULT_ASCII_ARMOUR, value);
+        editor.commit();
+    }
+
+    public boolean getForceV3Signatures() {
+        return mSharedPreferences.getBoolean(Constants.pref.FORCE_V3_SIGNATURES, false);
+    }
+
+    public void setForceV3Signatures(boolean value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putBoolean(Constants.pref.FORCE_V3_SIGNATURES, value);
+        editor.commit();
+    }
+
+    public boolean hasSeenChangeLog(String version) {
+        return mSharedPreferences.getBoolean(Constants.pref.HAS_SEEN_CHANGE_LOG + version, false);
+    }
+
+    public void setHasSeenChangeLog(String version, boolean value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putBoolean(Constants.pref.HAS_SEEN_CHANGE_LOG + version, value);
+        editor.commit();
+    }
+
+    public boolean hasSeenHelp() {
+        return mSharedPreferences.getBoolean(Constants.pref.HAS_SEEN_HELP, false);
+    }
+
+    public void setHasSeenHelp(boolean value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putBoolean(Constants.pref.HAS_SEEN_HELP, value);
+        editor.commit();
+    }
+
+    public String[] getKeyServers() {
+        String rawData = mSharedPreferences.getString(Constants.pref.KEY_SERVERS,
+                Constants.defaults.KEY_SERVERS);
+        Vector<String> servers = new Vector<String>();
+        String chunks[] = rawData.split(",");
+        for (int i = 0; i < chunks.length; ++i) {
+            String tmp = chunks[i].trim();
+            if (tmp.length() > 0) {
+                servers.add(tmp);
+            }
+        }
+        return servers.toArray(chunks);
+    }
+
+    public void setKeyServers(String[] value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        String rawData = "";
+        for (int i = 0; i < value.length; ++i) {
+            String tmp = value[i].trim();
+            if (tmp.length() == 0) {
+                continue;
+            }
+            if (!"".equals(rawData)) {
+                rawData += ",";
+            }
+            rawData += tmp;
+        }
+        editor.putString(Constants.pref.KEY_SERVERS, rawData);
+        editor.commit();
+    }
+}

org_apg/src/org/thialfihar/android/apg/Primes.java

@@ -0,0 +1,185 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import java.math.BigInteger;
+
+public final class Primes {
+    // taken from http://www.ietf.org/rfc/rfc3526.txt
+    public static final String P1536 =
+            "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1" +
+            "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD" +
+            "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245" +
+            "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED" +
+            "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D" +
+            "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F" +
+            "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D" +
+            "670C354E 4ABC9804 F1746C08 CA237327 FFFFFFFF FFFFFFFF";
+
+    public static final String P2048 =
+            "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1" +
+            "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD" +
+            "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245" +
+            "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED" +
+            "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D" +
+            "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F" +
+            "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D" +
+            "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B" +
+            "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9" +
+            "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510" +
+            "15728E5A 8AACAA68 FFFFFFFF FFFFFFFF";
+
+    public static final String P3072 =
+            "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1" +
+            "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD" +
+            "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245" +
+            "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED" +
+            "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D" +
+            "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F" +
+            "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D" +
+            "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B" +
+            "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9" +
+            "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510" +
+            "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64" +
+            "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7" +
+            "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B" +
+            "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C" +
+            "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31" +
+            "43DB5BFC E0FD108E 4B82D120 A93AD2CA FFFFFFFF FFFFFFFF";
+
+    public static final String P4096 =
+            "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1" +
+            "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD" +
+            "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245" +
+            "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED" +
+            "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D" +
+            "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F" +
+            "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D" +
+            "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B" +
+            "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9" +
+            "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510" +
+            "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64" +
+            "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7" +
+            "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B" +
+            "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C" +
+            "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31" +
+            "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7" +
+            "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA" +
+            "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6" +
+            "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED" +
+            "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9" +
+            "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34063199" +
+            "FFFFFFFF FFFFFFFF";
+
+    public static final String P6144 =
+            "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1" +
+            "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD" +
+            "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245" +
+            "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED" +
+            "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D" +
+            "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F" +
+            "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D" +
+            "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B" +
+            "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9" +
+            "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510" +
+            "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64" +
+            "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7" +
+            "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B" +
+            "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C" +
+            "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31" +
+            "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7" +
+            "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA" +
+            "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6" +
+            "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED" +
+            "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9" +
+            "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492" +
+            "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD" +
+            "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831" +
+            "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B" +
+            "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF" +
+            "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6" +
+            "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3" +
+            "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA" +
+            "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328" +
+            "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C" +
+            "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE" +
+            "12BF2D5B 0B7474D6 E694F91E 6DCC4024 FFFFFFFF FFFFFFFF";
+
+    public static final String P8192 =
+            "FFFFFFFF FFFFFFFF C90FDAA2 2168C234 C4C6628B 80DC1CD1" +
+            "29024E08 8A67CC74 020BBEA6 3B139B22 514A0879 8E3404DD" +
+            "EF9519B3 CD3A431B 302B0A6D F25F1437 4FE1356D 6D51C245" +
+            "E485B576 625E7EC6 F44C42E9 A637ED6B 0BFF5CB6 F406B7ED" +
+            "EE386BFB 5A899FA5 AE9F2411 7C4B1FE6 49286651 ECE45B3D" +
+            "C2007CB8 A163BF05 98DA4836 1C55D39A 69163FA8 FD24CF5F" +
+            "83655D23 DCA3AD96 1C62F356 208552BB 9ED52907 7096966D" +
+            "670C354E 4ABC9804 F1746C08 CA18217C 32905E46 2E36CE3B" +
+            "E39E772C 180E8603 9B2783A2 EC07A28F B5C55DF0 6F4C52C9" +
+            "DE2BCBF6 95581718 3995497C EA956AE5 15D22618 98FA0510" +
+            "15728E5A 8AAAC42D AD33170D 04507A33 A85521AB DF1CBA64" +
+            "ECFB8504 58DBEF0A 8AEA7157 5D060C7D B3970F85 A6E1E4C7" +
+            "ABF5AE8C DB0933D7 1E8C94E0 4A25619D CEE3D226 1AD2EE6B" +
+            "F12FFA06 D98A0864 D8760273 3EC86A64 521F2B18 177B200C" +
+            "BBE11757 7A615D6C 770988C0 BAD946E2 08E24FA0 74E5AB31" +
+            "43DB5BFC E0FD108E 4B82D120 A9210801 1A723C12 A787E6D7" +
+            "88719A10 BDBA5B26 99C32718 6AF4E23C 1A946834 B6150BDA" +
+            "2583E9CA 2AD44CE8 DBBBC2DB 04DE8EF9 2E8EFC14 1FBECAA6" +
+            "287C5947 4E6BC05D 99B2964F A090C3A2 233BA186 515BE7ED" +
+            "1F612970 CEE2D7AF B81BDD76 2170481C D0069127 D5B05AA9" +
+            "93B4EA98 8D8FDDC1 86FFB7DC 90A6C08F 4DF435C9 34028492" +
+            "36C3FAB4 D27C7026 C1D4DCB2 602646DE C9751E76 3DBA37BD" +
+            "F8FF9406 AD9E530E E5DB382F 413001AE B06A53ED 9027D831" +
+            "179727B0 865A8918 DA3EDBEB CF9B14ED 44CE6CBA CED4BB1B" +
+            "DB7F1447 E6CC254B 33205151 2BD7AF42 6FB8F401 378CD2BF" +
+            "5983CA01 C64B92EC F032EA15 D1721D03 F482D7CE 6E74FEF6" +
+            "D55E702F 46980C82 B5A84031 900B1C9E 59E7C97F BEC7E8F3" +
+            "23A97A7E 36CC88BE 0F1D45B7 FF585AC5 4BD407B2 2B4154AA" +
+            "CC8F6D7E BF48E1D8 14CC5ED2 0F8037E0 A79715EE F29BE328" +
+            "06A1D58B B7C5DA76 F550AA3D 8A1FBFF0 EB19CCB1 A313D55C" +
+            "DA56C9EC 2EF29632 387FE8D7 6E3C0468 043E8F66 3F4860EE" +
+            "12BF2D5B 0B7474D6 E694F91E 6DBE1159 74A3926F 12FEE5E4" +
+            "38777CB6 A932DF8C D8BEC4D0 73B931BA 3BC832B6 8D9DD300" +
+            "741FA7BF 8AFC47ED 2576F693 6BA42466 3AAB639C 5AE4F568" +
+            "3423B474 2BF1C978 238F16CB E39D652D E3FDB8BE FC848AD9" +
+            "22222E04 A4037C07 13EB57A8 1A23F0C7 3473FC64 6CEA306B" +
+            "4BCBC886 2F8385DD FA9D4B7F A2C087E8 79683303 ED5BDD3A" +
+            "062B3CF5 B3A278A6 6D2A13F8 3F44F82D DF310EE0 74AB6A36" +
+            "4597E899 A0255DC1 64F31CC5 0846851D F9AB4819 5DED7EA1" +
+            "B1D510BD 7EE74D73 FAF36BC3 1ECFA268 359046F4 EB879F92" +
+            "4009438B 481C6CD7 889A002E D5EE382B C9190DA6 FC026E47" +
+            "9558E447 5677E9AA 9E3050E2 765694DF C81F56E8 80B96E71" +
+            "60C980DD 98EDD3DF FFFFFFFF FFFFFFFF";
+
+    public static BigInteger getBestPrime(int keySize) {
+        String primeString;
+        if (keySize >= (8192 + 6144) / 2) {
+            primeString = P8192;
+        } else if (keySize >= (6144 + 4096) / 2) {
+            primeString = P6144;
+        } else if (keySize >= (4096 + 3072) / 2) {
+            primeString = P4096;
+        } else if (keySize >= (3072 + 2048) / 2) {
+            primeString = P3072;
+        } else if (keySize >= (2048 + 1536) / 2) {
+            primeString = P2048;
+        } else {
+            primeString = P1536;
+        }
+
+        return new BigInteger(primeString.replaceAll(" ", ""), 16);
+    }
+}

org_apg/src/org/thialfihar/android/apg/ProgressDialogUpdater.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+public interface ProgressDialogUpdater {
+    void setProgress(String message, int current, int total);
+
+    void setProgress(int resourceId, int current, int total);
+
+    void setProgress(int current, int total);
+}

org_apg/src/org/thialfihar/android/apg/Service.java

@@ -0,0 +1,92 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg;
+
+import android.content.Intent;
+import android.os.Binder;
+import android.os.Handler;
+import android.os.IBinder;
+
+public class Service extends android.app.Service {
+    private final IBinder mBinder = new LocalBinder();
+
+    public static final String EXTRA_TTL = "ttl";
+
+    private int mPassPhraseCacheTtl = 15;
+    private Handler mCacheHandler = new Handler();
+    private Runnable mCacheTask = new Runnable() {
+        public void run() {
+            // check every ttl/2 seconds, which shouldn't be heavy on the device (even if ttl = 15),
+            // and makes sure the longest a pass phrase survives in the cache is 1.5 * ttl
+            int delay = mPassPhraseCacheTtl * 1000 / 2;
+            // also make sure the delay is not longer than one minute
+            if (delay > 60000) {
+                delay = 60000;
+            }
+
+            delay = Apg.cleanUpCache(mPassPhraseCacheTtl, delay);
+            // don't check too often, even if we were close
+            if (delay < 5000) {
+                delay = 5000;
+            }
+
+            mCacheHandler.postDelayed(this, delay);
+        }
+    };
+
+    static private boolean mIsRunning = false;
+
+    @Override
+    public void onCreate() {
+        super.onCreate();
+
+        mIsRunning = true;
+    }
+
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        mIsRunning = false;
+    }
+
+    @Override
+    public void onStart(Intent intent, int startId) {
+        super.onStart(intent, startId);
+
+        if (intent != null) {
+            mPassPhraseCacheTtl = intent.getIntExtra(EXTRA_TTL, 15);
+        }
+        if (mPassPhraseCacheTtl < 15) {
+            mPassPhraseCacheTtl = 15;
+        }
+        mCacheHandler.removeCallbacks(mCacheTask);
+        mCacheHandler.postDelayed(mCacheTask, 1000);
+    }
+
+    static public boolean isRunning() {
+        return mIsRunning;
+    }
+
+    public class LocalBinder extends Binder {
+        Service getService() {
+            return Service.this;
+        }
+    }
+
+    @Override
+    public IBinder onBind(Intent intent) {
+        return mBinder;
+    }
+}

org_apg/src/org/thialfihar/android/apg/provider/ApgServiceBlobDatabase.java

@@ -0,0 +1,68 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.provider;
+
+import org.thialfihar.android.apg.ApgService;
+
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.net.Uri;
+import android.util.Log;
+
+public class ApgServiceBlobDatabase extends SQLiteOpenHelper {
+    
+    private static final String TAG = "ApgServiceBlobDatabase";
+
+    private static final int VERSION = 1;
+    private static final String NAME = "apg_service_blob_data";
+    private static final String TABLE = "data";
+        
+    public ApgServiceBlobDatabase(Context context) {
+        super(context, NAME, null, VERSION);
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "constructor called");
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "onCreate() called");
+        db.execSQL("create table " + TABLE + " ( _id integer primary key autoincrement," +
+        		"key text not null)");
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "onUpgrade() called");
+        // no upgrade necessary yet
+    }
+    
+    public Uri insert(ContentValues vals) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "insert() called");
+        SQLiteDatabase db = this.getWritableDatabase();
+        long newId = db.insert(TABLE, null, vals);
+        return ContentUris.withAppendedId(ApgServiceBlobProvider.CONTENT_URI, newId);
+    }
+    
+    public Cursor query(String id, String key) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "query() called");
+        SQLiteDatabase db = this.getReadableDatabase();
+        return db.query(TABLE, new String[] {"_id"},
+                "_id = ? and key = ?", new String[] {id, key},
+                null, null, null);
+    }
+}

org_apg/src/org/thialfihar/android/apg/provider/ApgServiceBlobProvider.java

@@ -0,0 +1,152 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.provider;
+
+import org.thialfihar.android.apg.ApgService;
+import org.thialfihar.android.apg.Constants;
+
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.List;
+import java.util.UUID;
+
+public class ApgServiceBlobProvider extends ContentProvider {
+    
+    private static final String TAG = "ApgServiceBlobProvider";
+    
+    public static final Uri CONTENT_URI = Uri.parse("content://org.thialfihar.android.apg.provider.apgserviceblobprovider");
+    
+    private static final String COLUMN_KEY = "key";
+    
+    private static final String STORE_PATH = Constants.path.APP_DIR+"/ApgServiceBlobs";
+    
+    private ApgServiceBlobDatabase mDb = null;
+
+    public ApgServiceBlobProvider() {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "Constructor called");
+        File dir = new File(STORE_PATH);
+        dir.mkdirs();
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "Constructor finished");
+    }
+
+    @Override
+    public int delete(Uri arg0, String arg1, String[] arg2) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "delete() called");
+        // TODO Auto-generated method stub
+        return 0;
+    }
+
+    @Override
+    public String getType(Uri arg0) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "getType() called");
+        // not needed for now
+        return null;
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues ignored) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "insert() called");
+        // ContentValues are actually ignored, because we want to store a blob with no more information 
+        // but have to create an record with the password generated here first
+        
+        ContentValues vals = new ContentValues();
+        
+        // Insert a random key in the database. This has to provided by the caller when updating or
+        // getting the blob
+        String password = UUID.randomUUID().toString();
+        vals.put(COLUMN_KEY, password);
+        
+        Uri insertedUri = mDb.insert(vals);
+        return Uri.withAppendedPath(insertedUri, password);
+    }
+
+    @Override
+    public boolean onCreate() {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "onCreate() called");
+        mDb = new ApgServiceBlobDatabase(getContext());
+        // TODO Auto-generated method stub
+        return true;
+    }
+
+    @Override
+    public Cursor query(Uri arg0, String[] arg1, String arg2, String[] arg3, String arg4) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "query() called");
+        // TODO Auto-generated method stub
+        return null;
+    }
+
+    @Override
+    public int update(Uri arg0, ContentValues arg1, String arg2, String[] arg3) {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "update() called");
+        // TODO Auto-generated method stub
+        return 0;
+    }
+    
+    @Override
+    public ParcelFileDescriptor openFile(Uri uri, String mode) throws SecurityException, FileNotFoundException {
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "openFile() called");
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "... with uri: "+uri.toString());
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "... with mode: "+mode);
+        
+        List<String> segments = uri.getPathSegments();
+        if(segments.size() < 2) {
+            throw new SecurityException("Password not found in URI");
+        }
+        String id = segments.get(0);
+        String key = segments.get(1);
+        
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "... got id: "+id);
+        if(ApgService.LOCAL_LOGD) Log.d(TAG, "... and key: "+key);
+
+        // get the data
+        Cursor result = mDb.query(id, key);
+        
+        if(result.getCount() == 0) {
+            // either the key is wrong or no id exists
+            throw new FileNotFoundException("No file found with that ID and/or password");
+        }
+        
+        File targetFile = new File(STORE_PATH, id);
+        if(mode.equals("w")) {
+            if(ApgService.LOCAL_LOGD) Log.d(TAG, "... will try to open file w");
+            if( !targetFile.exists() ) {
+                try {
+                    targetFile.createNewFile();
+                } catch (IOException e) {
+                    Log.e(TAG, "... got IEOException on creating new file", e);
+                    throw new FileNotFoundException("Could not create file to write to");
+                }
+            }
+            return ParcelFileDescriptor.open(targetFile, ParcelFileDescriptor.MODE_WRITE_ONLY | ParcelFileDescriptor.MODE_TRUNCATE );
+        } else if(mode.equals("r")) {
+            if(ApgService.LOCAL_LOGD) Log.d(TAG, "... will try to open file r");
+            if( !targetFile.exists() ) {
+                throw new FileNotFoundException("Error: Could not find the file requested");
+            }
+            return ParcelFileDescriptor.open(targetFile, ParcelFileDescriptor.MODE_READ_ONLY);
+        }
+
+        return null;
+    }
+
+}

org_apg/src/org/thialfihar/android/apg/provider/DataProvider.java

@@ -0,0 +1,381 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.provider;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.util.HashMap;
+
+import org.thialfihar.android.apg.Id;
+
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.content.UriMatcher;
+import android.database.Cursor;
+import android.database.DatabaseUtils;
+import android.database.sqlite.SQLiteQueryBuilder;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
+import android.text.TextUtils;
+
+public class DataProvider extends ContentProvider {
+    public static final String AUTHORITY = "org.thialfihar.android.apg.provider";
+
+    private static final int PUBLIC_KEY_RING = 101;
+    private static final int PUBLIC_KEY_RING_ID = 102;
+    private static final int PUBLIC_KEY_RING_BY_KEY_ID = 103;
+    private static final int PUBLIC_KEY_RING_BY_EMAILS = 104;
+    private static final int PUBLIC_KEY_RING_KEY = 111;
+    private static final int PUBLIC_KEY_RING_KEY_RANK = 112;
+    private static final int PUBLIC_KEY_RING_USER_ID = 121;
+    private static final int PUBLIC_KEY_RING_USER_ID_RANK = 122;
+
+    private static final int SECRET_KEY_RING = 201;
+    private static final int SECRET_KEY_RING_ID = 202;
+    private static final int SECRET_KEY_RING_BY_KEY_ID = 203;
+    private static final int SECRET_KEY_RING_BY_EMAILS = 204;
+    private static final int SECRET_KEY_RING_KEY = 211;
+    private static final int SECRET_KEY_RING_KEY_RANK = 212;
+    private static final int SECRET_KEY_RING_USER_ID = 221;
+    private static final int SECRET_KEY_RING_USER_ID_RANK = 222;
+
+    private static final int DATA_STREAM = 301;
+
+    private static final String PUBLIC_KEY_RING_CONTENT_DIR_TYPE =
+            "vnd.android.cursor.dir/vnd.thialfihar.apg.public.key_ring";
+    private static final String PUBLIC_KEY_RING_CONTENT_ITEM_TYPE =
+            "vnd.android.cursor.item/vnd.thialfihar.apg.public.key_ring";
+
+    private static final String PUBLIC_KEY_CONTENT_DIR_TYPE =
+            "vnd.android.cursor.dir/vnd.thialfihar.apg.public.key";
+    private static final String PUBLIC_KEY_CONTENT_ITEM_TYPE =
+            "vnd.android.cursor.item/vnd.thialfihar.apg.public.key";
+
+    private static final String SECRET_KEY_RING_CONTENT_DIR_TYPE =
+            "vnd.android.cursor.dir/vnd.thialfihar.apg.secret.key_ring";
+    private static final String SECRET_KEY_RING_CONTENT_ITEM_TYPE =
+            "vnd.android.cursor.item/vnd.thialfihar.apg.secret.key_ring";
+
+    private static final String SECRET_KEY_CONTENT_DIR_TYPE =
+            "vnd.android.cursor.dir/vnd.thialfihar.apg.secret.key";
+    private static final String SECRET_KEY_CONTENT_ITEM_TYPE =
+            "vnd.android.cursor.item/vnd.thialfihar.apg.secret.key";
+
+    private static final String USER_ID_CONTENT_DIR_TYPE =
+            "vnd.android.cursor.dir/vnd.thialfihar.apg.user_id";
+    private static final String USER_ID_CONTENT_ITEM_TYPE =
+            "vnd.android.cursor.item/vnd.thialfihar.apg.user_id";
+
+    public static final String _ID = "_id";
+    public static final String MASTER_KEY_ID = "master_key_id";
+    public static final String KEY_ID = "key_id";
+    public static final String USER_ID = "user_id";
+
+    private static final UriMatcher mUriMatcher;
+
+    private Database mDb;
+
+    static {
+        mUriMatcher = new UriMatcher(UriMatcher.NO_MATCH);
+        mUriMatcher.addURI(AUTHORITY, "key_rings/public/key_id/*", PUBLIC_KEY_RING_BY_KEY_ID);
+        mUriMatcher.addURI(AUTHORITY, "key_rings/public/emails/*", PUBLIC_KEY_RING_BY_EMAILS);
+
+        mUriMatcher.addURI(AUTHORITY, "key_rings/public/*/keys", PUBLIC_KEY_RING_KEY);
+        mUriMatcher.addURI(AUTHORITY, "key_rings/public/*/keys/#", PUBLIC_KEY_RING_KEY_RANK);
+
+        mUriMatcher.addURI(AUTHORITY, "key_rings/public/*/user_ids", PUBLIC_KEY_RING_USER_ID);
+        mUriMatcher.addURI(AUTHORITY, "key_rings/public/*/user_ids/#", PUBLIC_KEY_RING_USER_ID_RANK);
+
+        mUriMatcher.addURI(AUTHORITY, "key_rings/public", PUBLIC_KEY_RING);
+        mUriMatcher.addURI(AUTHORITY, "key_rings/public/*", PUBLIC_KEY_RING_ID);
+
+        mUriMatcher.addURI(AUTHORITY, "key_rings/secret/key_id/*", SECRET_KEY_RING_BY_KEY_ID);
+        mUriMatcher.addURI(AUTHORITY, "key_rings/secret/emails/*", SECRET_KEY_RING_BY_EMAILS);
+
+        mUriMatcher.addURI(AUTHORITY, "key_rings/secret/*/keys", SECRET_KEY_RING_KEY);
+        mUriMatcher.addURI(AUTHORITY, "key_rings/secret/*/keys/#", SECRET_KEY_RING_KEY_RANK);
+
+        mUriMatcher.addURI(AUTHORITY, "key_rings/secret/*/user_ids", SECRET_KEY_RING_USER_ID);
+        mUriMatcher.addURI(AUTHORITY, "key_rings/secret/*/user_ids/#", SECRET_KEY_RING_USER_ID_RANK);
+
+        mUriMatcher.addURI(AUTHORITY, "key_rings/secret", SECRET_KEY_RING);
+        mUriMatcher.addURI(AUTHORITY, "key_rings/secret/*", SECRET_KEY_RING_ID);
+
+        mUriMatcher.addURI(AUTHORITY, "data/*", DATA_STREAM);
+    }
+
+    @Override
+    public boolean onCreate() {
+        mDb = new Database(getContext());
+        return true;
+    }
+
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection,
+                        String[] selectionArgs, String sortOrder) {
+        // TODO: implement the others, then use them for the lists
+        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
+        HashMap<String, String> projectionMap = new HashMap<String, String>();
+
+        int match = mUriMatcher.match(uri);
+        int type;
+        switch (match) {
+            case PUBLIC_KEY_RING:
+            case PUBLIC_KEY_RING_ID:
+            case PUBLIC_KEY_RING_BY_KEY_ID:
+            case PUBLIC_KEY_RING_BY_EMAILS:
+            case PUBLIC_KEY_RING_KEY:
+            case PUBLIC_KEY_RING_KEY_RANK:
+            case PUBLIC_KEY_RING_USER_ID:
+            case PUBLIC_KEY_RING_USER_ID_RANK:
+                type = Id.database.type_public;
+                break;
+
+            case SECRET_KEY_RING:
+            case SECRET_KEY_RING_ID:
+            case SECRET_KEY_RING_BY_KEY_ID:
+            case SECRET_KEY_RING_BY_EMAILS:
+            case SECRET_KEY_RING_KEY:
+            case SECRET_KEY_RING_KEY_RANK:
+            case SECRET_KEY_RING_USER_ID:
+            case SECRET_KEY_RING_USER_ID_RANK:
+                type = Id.database.type_secret;
+                break;
+
+            default: {
+                throw new IllegalArgumentException("Unknown URI " + uri);
+            }
+        }
+
+        qb.appendWhere(KeyRings.TABLE_NAME + "." + KeyRings.TYPE + " = " + type);
+
+        switch (match) {
+            case PUBLIC_KEY_RING_ID:
+            case SECRET_KEY_RING_ID: {
+                qb.appendWhere(" AND " +
+                               KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID + " = ");
+                qb.appendWhereEscapeString(uri.getPathSegments().get(2));
+
+                // break omitted intentionally
+            }
+
+            case PUBLIC_KEY_RING:
+            case SECRET_KEY_RING: {
+                qb.setTables(KeyRings.TABLE_NAME + " INNER JOIN " + Keys.TABLE_NAME + " ON " +
+                             "(" + KeyRings.TABLE_NAME + "." + KeyRings._ID + " = " +
+                             Keys.TABLE_NAME + "." + Keys.KEY_RING_ID + " AND " +
+                             Keys.TABLE_NAME + "." + Keys.IS_MASTER_KEY + " = '1'" +
+                             ") " +
+                             " INNER JOIN " + UserIds.TABLE_NAME + " ON " +
+                             "(" + Keys.TABLE_NAME + "." + Keys._ID + " = " +
+                             UserIds.TABLE_NAME + "." + UserIds.KEY_ID + " AND " +
+                             UserIds.TABLE_NAME + "." + UserIds.RANK + " = '0') ");
+
+                projectionMap.put(_ID,
+                                  KeyRings.TABLE_NAME + "." + KeyRings._ID);
+                projectionMap.put(MASTER_KEY_ID,
+                                  KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID);
+                projectionMap.put(USER_ID,
+                                  UserIds.TABLE_NAME + "." + UserIds.USER_ID);
+
+                if (TextUtils.isEmpty(sortOrder)) {
+                    sortOrder = UserIds.TABLE_NAME + "." + UserIds.USER_ID + " ASC";
+                }
+
+                break;
+            }
+
+            case SECRET_KEY_RING_BY_KEY_ID:
+            case PUBLIC_KEY_RING_BY_KEY_ID: {
+                qb.setTables(Keys.TABLE_NAME + " AS tmp INNER JOIN " +
+                             KeyRings.TABLE_NAME + " ON (" +
+                             KeyRings.TABLE_NAME + "." + KeyRings._ID + " = " +
+                             "tmp." + Keys.KEY_RING_ID + ")" +
+                             " INNER JOIN " + Keys.TABLE_NAME + " ON " +
+                             "(" + KeyRings.TABLE_NAME + "." + KeyRings._ID + " = " +
+                             Keys.TABLE_NAME + "." + Keys.KEY_RING_ID + " AND " +
+                             Keys.TABLE_NAME + "." + Keys.IS_MASTER_KEY + " = '1'" +
+                             ") " +
+                             " INNER JOIN " + UserIds.TABLE_NAME + " ON " +
+                             "(" + Keys.TABLE_NAME + "." + Keys._ID + " = " +
+                             UserIds.TABLE_NAME + "." + UserIds.KEY_ID + " AND " +
+                             UserIds.TABLE_NAME + "." + UserIds.RANK + " = '0') ");
+
+                projectionMap.put(_ID,
+                                  KeyRings.TABLE_NAME + "." + KeyRings._ID);
+                projectionMap.put(MASTER_KEY_ID,
+                                  KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID);
+                projectionMap.put(USER_ID,
+                                  UserIds.TABLE_NAME + "." + UserIds.USER_ID);
+
+                qb.appendWhere(" AND tmp." + Keys.KEY_ID + " = ");
+                qb.appendWhereEscapeString(uri.getPathSegments().get(3));
+
+                break;
+            }
+
+            case SECRET_KEY_RING_BY_EMAILS:
+            case PUBLIC_KEY_RING_BY_EMAILS: {
+                qb.setTables(KeyRings.TABLE_NAME + " INNER JOIN " + Keys.TABLE_NAME + " ON " +
+                             "(" + KeyRings.TABLE_NAME + "." + KeyRings._ID + " = " +
+                             Keys.TABLE_NAME + "." + Keys.KEY_RING_ID + " AND " +
+                             Keys.TABLE_NAME + "." + Keys.IS_MASTER_KEY + " = '1'" +
+                             ") " +
+                             " INNER JOIN " + UserIds.TABLE_NAME + " ON " +
+                             "(" + Keys.TABLE_NAME + "." + Keys._ID + " = " +
+                             UserIds.TABLE_NAME + "." + UserIds.KEY_ID + " AND " +
+                             UserIds.TABLE_NAME + "." + UserIds.RANK + " = '0') ");
+
+                projectionMap.put(_ID,
+                                  KeyRings.TABLE_NAME + "." + KeyRings._ID);
+                projectionMap.put(MASTER_KEY_ID,
+                                  KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID);
+                projectionMap.put(USER_ID,
+                                  UserIds.TABLE_NAME + "." + UserIds.USER_ID);
+
+                String emails = uri.getPathSegments().get(3);
+                String chunks[] = emails.split(" *, *");
+                boolean gotCondition = false;
+                String emailWhere = "";
+                for (int i = 0; i < chunks.length; ++i) {
+                    if (chunks[i].length() == 0) {
+                        continue;
+                    }
+                    if (i != 0) {
+                        emailWhere += " OR ";
+                    }
+                    emailWhere += "tmp." + UserIds.USER_ID + " LIKE ";
+                    // match '*<email>', so it has to be at the *end* of the user id
+                    emailWhere += DatabaseUtils.sqlEscapeString("%<" + chunks[i] + ">");
+                    gotCondition = true;
+                }
+
+                if (gotCondition) {
+                    qb.appendWhere(" AND EXISTS (SELECT tmp." + UserIds._ID +
+                                     " FROM " + UserIds.TABLE_NAME +
+                                       " AS tmp WHERE tmp." + UserIds.KEY_ID + " = " +
+                                           Keys.TABLE_NAME + "." + Keys._ID +
+                                       " AND (" + emailWhere + "))");
+                }
+
+                break;
+            }
+
+            default: {
+                throw new IllegalArgumentException("Unknown URI " + uri);
+            }
+        }
+
+        qb.setProjectionMap(projectionMap);
+
+        // If no sort order is specified use the default
+        String orderBy;
+        if (TextUtils.isEmpty(sortOrder)) {
+            orderBy = null;
+        } else {
+            orderBy = sortOrder;
+        }
+
+        //System.out.println(qb.buildQuery(projection, selection, selectionArgs, null, null, sortOrder, null).replace("WHERE", "WHERE\n"));
+        Cursor c = qb.query(mDb.db(), projection, selection, selectionArgs, null, null, orderBy);
+
+        // Tell the cursor what uri to watch, so it knows when its source data changes
+        c.setNotificationUri(getContext().getContentResolver(), uri);
+        return c;
+    }
+
+    @Override
+    public String getType(Uri uri) {
+        switch (mUriMatcher.match(uri)) {
+            case PUBLIC_KEY_RING:
+            case PUBLIC_KEY_RING_BY_EMAILS:
+                return PUBLIC_KEY_RING_CONTENT_DIR_TYPE;
+
+            case PUBLIC_KEY_RING_ID:
+                return PUBLIC_KEY_RING_CONTENT_ITEM_TYPE;
+
+            case PUBLIC_KEY_RING_BY_KEY_ID:
+                return PUBLIC_KEY_RING_CONTENT_ITEM_TYPE;
+
+            case PUBLIC_KEY_RING_KEY:
+                return PUBLIC_KEY_CONTENT_DIR_TYPE;
+
+            case PUBLIC_KEY_RING_KEY_RANK:
+                return PUBLIC_KEY_CONTENT_ITEM_TYPE;
+
+            case PUBLIC_KEY_RING_USER_ID:
+                return USER_ID_CONTENT_DIR_TYPE;
+
+            case PUBLIC_KEY_RING_USER_ID_RANK:
+                return USER_ID_CONTENT_ITEM_TYPE;
+
+            case SECRET_KEY_RING:
+            case SECRET_KEY_RING_BY_EMAILS:
+                return SECRET_KEY_RING_CONTENT_DIR_TYPE;
+
+            case SECRET_KEY_RING_ID:
+                return SECRET_KEY_RING_CONTENT_ITEM_TYPE;
+
+            case SECRET_KEY_RING_BY_KEY_ID:
+                return SECRET_KEY_RING_CONTENT_ITEM_TYPE;
+
+            case SECRET_KEY_RING_KEY:
+                return SECRET_KEY_CONTENT_DIR_TYPE;
+
+            case SECRET_KEY_RING_KEY_RANK:
+                return SECRET_KEY_CONTENT_ITEM_TYPE;
+
+            case SECRET_KEY_RING_USER_ID:
+                return USER_ID_CONTENT_DIR_TYPE;
+
+            case SECRET_KEY_RING_USER_ID_RANK:
+                return USER_ID_CONTENT_ITEM_TYPE;
+
+            default:
+                throw new IllegalArgumentException("Unknown URI " + uri);
+        }
+    }
+
+    @Override
+    public Uri insert(Uri uri, ContentValues initialValues) {
+        // not supported
+        return null;
+    }
+
+    @Override
+    public int delete(Uri uri, String where, String[] whereArgs) {
+        // not supported
+        return 0;
+    }
+
+    @Override
+    public int update(Uri uri, ContentValues values, String where, String[] whereArgs) {
+        // not supported
+        return 0;
+    }
+
+    @Override
+    public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
+        int match = mUriMatcher.match(uri);
+        if (match != DATA_STREAM) {
+            throw new FileNotFoundException();
+        }
+        String fileName = uri.getPathSegments().get(1);
+        File file = new File(getContext().getFilesDir().getAbsolutePath(), fileName);
+        return ParcelFileDescriptor.open(file, ParcelFileDescriptor.MODE_READ_ONLY);
+    }
+}

org_apg/src/org/thialfihar/android/apg/provider/Database.java

@@ -0,0 +1,616 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.provider;
+
+import org.spongycastle.openpgp.PGPException;
+import org.spongycastle.openpgp.PGPPublicKey;
+import org.spongycastle.openpgp.PGPPublicKeyRing;
+import org.spongycastle.openpgp.PGPSecretKey;
+import org.spongycastle.openpgp.PGPSecretKeyRing;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.util.IterableIterator;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+import android.util.Log;
+
+import java.io.IOException;
+import java.util.Date;
+import java.util.HashMap;
+import java.util.Vector;
+
+public class Database extends SQLiteOpenHelper {
+    public static class GeneralException extends Exception {
+        static final long serialVersionUID = 0xf812773343L;
+
+        public GeneralException(String message) {
+            super(message);
+        }
+    }
+
+    private static final String DATABASE_NAME = "apg";
+    private static final int DATABASE_VERSION = 2;
+
+    public static final String AUTHORITY = "org.thialfihar.android.apg.database";
+
+    public static HashMap<String, String> sKeyRingsProjection;
+    public static HashMap<String, String> sKeysProjection;
+    public static HashMap<String, String> sUserIdsProjection;
+
+    private SQLiteDatabase mDb = null;
+    private int mStatus = 0;
+
+    static {
+        sKeyRingsProjection = new HashMap<String, String>();
+        sKeyRingsProjection.put(KeyRings._ID, KeyRings._ID);
+        sKeyRingsProjection.put(KeyRings.MASTER_KEY_ID, KeyRings.MASTER_KEY_ID);
+        sKeyRingsProjection.put(KeyRings.TYPE, KeyRings.TYPE);
+        sKeyRingsProjection.put(KeyRings.WHO_ID, KeyRings.WHO_ID);
+        sKeyRingsProjection.put(KeyRings.KEY_RING_DATA, KeyRings.KEY_RING_DATA);
+
+        sKeysProjection = new HashMap<String, String>();
+        sKeysProjection.put(Keys._ID, Keys._ID);
+        sKeysProjection.put(Keys.KEY_ID, Keys.KEY_ID);
+        sKeysProjection.put(Keys.TYPE, Keys.TYPE);
+        sKeysProjection.put(Keys.IS_MASTER_KEY, Keys.IS_MASTER_KEY);
+        sKeysProjection.put(Keys.ALGORITHM, Keys.ALGORITHM);
+        sKeysProjection.put(Keys.KEY_SIZE, Keys.KEY_SIZE);
+        sKeysProjection.put(Keys.CAN_SIGN, Keys.CAN_SIGN);
+        sKeysProjection.put(Keys.CAN_ENCRYPT, Keys.CAN_ENCRYPT);
+        sKeysProjection.put(Keys.IS_REVOKED, Keys.IS_REVOKED);
+        sKeysProjection.put(Keys.CREATION, Keys.CREATION);
+        sKeysProjection.put(Keys.EXPIRY, Keys.EXPIRY);
+        sKeysProjection.put(Keys.KEY_DATA, Keys.KEY_DATA);
+        sKeysProjection.put(Keys.RANK, Keys.RANK);
+
+        sUserIdsProjection = new HashMap<String, String>();
+        sUserIdsProjection.put(UserIds._ID, UserIds._ID);
+        sUserIdsProjection.put(UserIds.KEY_ID, UserIds.KEY_ID);
+        sUserIdsProjection.put(UserIds.USER_ID, UserIds.USER_ID);
+        sUserIdsProjection.put(UserIds.RANK, UserIds.RANK);
+    }
+
+    public Database(Context context) {
+        super(context, DATABASE_NAME, null, DATABASE_VERSION);
+        // force upgrade to test things
+        //onUpgrade(getWritableDatabase(), 1, 2);
+        mDb = getWritableDatabase();
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        mDb.close();
+        super.finalize();
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        db.execSQL("CREATE TABLE " + KeyRings.TABLE_NAME + " (" +
+                   KeyRings._ID + " " + KeyRings._ID_type + "," +
+                   KeyRings.MASTER_KEY_ID + " " + KeyRings.MASTER_KEY_ID_type + ", " +
+                   KeyRings.TYPE + " " + KeyRings.TYPE_type + ", " +
+                   KeyRings.WHO_ID + " " + KeyRings.WHO_ID_type + ", " +
+                   KeyRings.KEY_RING_DATA + " " + KeyRings.KEY_RING_DATA_type + ");");
+
+        db.execSQL("CREATE TABLE " + Keys.TABLE_NAME + " (" +
+                   Keys._ID + " " + Keys._ID_type + "," +
+                   Keys.KEY_ID + " " + Keys.KEY_ID_type + ", " +
+                   Keys.TYPE + " " + Keys.TYPE_type + ", " +
+                   Keys.IS_MASTER_KEY + " " + Keys.IS_MASTER_KEY_type + ", " +
+                   Keys.ALGORITHM + " " + Keys.ALGORITHM_type + ", " +
+                   Keys.KEY_SIZE + " " + Keys.KEY_SIZE_type + ", " +
+                   Keys.CAN_SIGN + " " + Keys.CAN_SIGN_type + ", " +
+                   Keys.CAN_ENCRYPT + " " + Keys.CAN_ENCRYPT_type + ", " +
+                   Keys.IS_REVOKED + " " + Keys.IS_REVOKED_type + ", " +
+                   Keys.CREATION + " " + Keys.CREATION_type + ", " +
+                   Keys.EXPIRY + " " + Keys.EXPIRY_type + ", " +
+                   Keys.KEY_RING_ID + " " + Keys.KEY_RING_ID_type + ", " +
+                   Keys.KEY_DATA + " " + Keys.KEY_DATA_type +
+                   Keys.RANK + " " + Keys.RANK_type + ");");
+
+        db.execSQL("CREATE TABLE " + UserIds.TABLE_NAME + " (" +
+                   UserIds._ID + " " + UserIds._ID_type + "," +
+                   UserIds.KEY_ID + " " + UserIds.KEY_ID_type + "," +
+                   UserIds.USER_ID + " " + UserIds.USER_ID_type + "," +
+                   UserIds.RANK + " " + UserIds.RANK_type + ");");
+
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        mDb = db;
+        for (int version = oldVersion; version < newVersion; ++version) {
+            switch (version) {
+                case 1: { // upgrade 1 to 2
+                    db.execSQL("DROP TABLE IF EXISTS " + KeyRings.TABLE_NAME + ";");
+                    db.execSQL("DROP TABLE IF EXISTS " + Keys.TABLE_NAME + ";");
+                    db.execSQL("DROP TABLE IF EXISTS " + UserIds.TABLE_NAME + ";");
+
+                    db.execSQL("CREATE TABLE " + KeyRings.TABLE_NAME + " (" +
+                               KeyRings._ID + " " + KeyRings._ID_type + "," +
+                               KeyRings.MASTER_KEY_ID + " " + KeyRings.MASTER_KEY_ID_type + ", " +
+                               KeyRings.TYPE + " " + KeyRings.TYPE_type + ", " +
+                               KeyRings.WHO_ID + " " + KeyRings.WHO_ID_type + ", " +
+                               KeyRings.KEY_RING_DATA + " " + KeyRings.KEY_RING_DATA_type + ");");
+
+                    db.execSQL("CREATE TABLE " + Keys.TABLE_NAME + " (" +
+                               Keys._ID + " " + Keys._ID_type + "," +
+                               Keys.KEY_ID + " " + Keys.KEY_ID_type + ", " +
+                               Keys.TYPE + " " + Keys.TYPE_type + ", " +
+                               Keys.IS_MASTER_KEY + " " + Keys.IS_MASTER_KEY_type + ", " +
+                               Keys.ALGORITHM + " " + Keys.ALGORITHM_type + ", " +
+                               Keys.KEY_SIZE + " " + Keys.KEY_SIZE_type + ", " +
+                               Keys.CAN_SIGN + " " + Keys.CAN_SIGN_type + ", " +
+                               Keys.CAN_ENCRYPT + " " + Keys.CAN_ENCRYPT_type + ", " +
+                               Keys.IS_REVOKED + " " + Keys.IS_REVOKED_type + ", " +
+                               Keys.CREATION + " " + Keys.CREATION_type + ", " +
+                               Keys.EXPIRY + " " + Keys.EXPIRY_type + ", " +
+                               Keys.KEY_RING_ID + " " + Keys.KEY_RING_ID_type + ", " +
+                               Keys.KEY_DATA + " " + Keys.KEY_DATA_type +
+                               Keys.RANK + " " + Keys.RANK_type + ");");
+
+                    db.execSQL("CREATE TABLE " + UserIds.TABLE_NAME + " (" +
+                               UserIds._ID + " " + UserIds._ID_type + "," +
+                               UserIds.KEY_ID + " " + UserIds.KEY_ID_type + "," +
+                               UserIds.USER_ID + " " + UserIds.USER_ID_type + "," +
+                               UserIds.RANK + " " + UserIds.RANK_type + ");");
+
+                    Cursor cursor = db.query("public_keys", new String[] { "c_key_data" },
+                                             null, null, null, null, null);
+                    if (cursor != null && cursor.moveToFirst()) {
+                        do {
+                            byte[] data = cursor.getBlob(0);
+                            try {
+                                PGPPublicKeyRing keyRing = new PGPPublicKeyRing(data);
+                                saveKeyRing(keyRing);
+                            } catch (IOException e) {
+                                Log.e("apg.db.upgrade", "key import failed: " + e);
+                            } catch (GeneralException e) {
+                                Log.e("apg.db.upgrade", "key import failed: " + e);
+                            }
+                        } while (cursor.moveToNext());
+                    }
+
+                    if (cursor != null) {
+                        cursor.close();
+                    }
+
+                    cursor = db.query("secret_keys", new String[]{ "c_key_data" },
+                                      null, null, null, null, null);
+                    if (cursor != null && cursor.moveToFirst()) {
+                        do {
+                            byte[] data = cursor.getBlob(0);
+                            try {
+                                PGPSecretKeyRing keyRing = new PGPSecretKeyRing(data);
+                                saveKeyRing(keyRing);
+                            } catch (IOException e) {
+                                Log.e("apg.db.upgrade", "key import failed: " + e);
+                            } catch (PGPException e) {
+                                Log.e("apg.db.upgrade", "key import failed: " + e);
+                            } catch (GeneralException e) {
+                                Log.e("apg.db.upgrade", "key import failed: " + e);
+                            }
+                        } while (cursor.moveToNext());
+                    }
+
+                    if (cursor != null) {
+                        cursor.close();
+                    }
+
+                    db.execSQL("DROP TABLE IF EXISTS public_keys;");
+                    db.execSQL("DROP TABLE IF EXISTS secret_keys;");
+
+                    break;
+                }
+
+                default: {
+                    break;
+                }
+            }
+        }
+        mDb = null;
+    }
+
+    public int saveKeyRing(PGPPublicKeyRing keyRing) throws IOException, GeneralException {
+        mDb.beginTransaction();
+        ContentValues values = new ContentValues();
+        PGPPublicKey masterKey = keyRing.getPublicKey();
+        long masterKeyId = masterKey.getKeyID();
+
+        values.put(KeyRings.MASTER_KEY_ID, masterKeyId);
+        values.put(KeyRings.TYPE, Id.database.type_public);
+        values.put(KeyRings.KEY_RING_DATA, keyRing.getEncoded());
+
+        long rowId = insertOrUpdateKeyRing(values);
+        int returnValue = mStatus;
+
+        if (rowId == -1) {
+            throw new GeneralException("saving public key ring " + masterKeyId + " failed");
+        }
+
+        Vector<Integer> seenIds = new Vector<Integer>();
+        int rank = 0;
+        for (PGPPublicKey key : new IterableIterator<PGPPublicKey>(keyRing.getPublicKeys())) {
+            seenIds.add(saveKey(rowId, key, rank));
+            ++rank;
+        }
+
+        String seenIdsStr = "";
+        for (Integer id : seenIds) {
+            if (seenIdsStr.length() > 0) {
+                seenIdsStr += ",";
+            }
+            seenIdsStr += id;
+        }
+        mDb.delete(Keys.TABLE_NAME,
+                   Keys.KEY_RING_ID + " = ? AND " +
+                   Keys._ID + " NOT IN (" + seenIdsStr + ")",
+                   new String[] { "" + rowId });
+
+        mDb.setTransactionSuccessful();
+        mDb.endTransaction();
+        return returnValue;
+    }
+
+    public int saveKeyRing(PGPSecretKeyRing keyRing) throws IOException, GeneralException {
+        mDb.beginTransaction();
+        ContentValues values = new ContentValues();
+        PGPSecretKey masterKey = keyRing.getSecretKey();
+        long masterKeyId = masterKey.getKeyID();
+
+        values.put(KeyRings.MASTER_KEY_ID, masterKeyId);
+        values.put(KeyRings.TYPE, Id.database.type_secret);
+        values.put(KeyRings.KEY_RING_DATA, keyRing.getEncoded());
+
+        long rowId = insertOrUpdateKeyRing(values);
+        int returnValue = mStatus;
+
+        if (rowId == -1) {
+            throw new GeneralException("saving secret key ring " + masterKeyId + " failed");
+        }
+
+        Vector<Integer> seenIds = new Vector<Integer>();
+        int rank = 0;
+        for (PGPSecretKey key : new IterableIterator<PGPSecretKey>(keyRing.getSecretKeys())) {
+            seenIds.add(saveKey(rowId, key, rank));
+            ++rank;
+        }
+
+        String seenIdsStr = "";
+        for (Integer id : seenIds) {
+            if (seenIdsStr.length() > 0) {
+                seenIdsStr += ",";
+            }
+            seenIdsStr += id;
+        }
+        mDb.delete(Keys.TABLE_NAME,
+                   Keys.KEY_RING_ID + " = ? AND " +
+                   Keys._ID + " NOT IN (" + seenIdsStr + ")",
+                   new String[] { "" + rowId });
+
+        mDb.setTransactionSuccessful();
+        mDb.endTransaction();
+        return returnValue;
+    }
+
+    private int saveKey(long keyRingId, PGPPublicKey key, int rank)
+            throws IOException, GeneralException {
+        ContentValues values = new ContentValues();
+
+        values.put(Keys.KEY_ID, key.getKeyID());
+        values.put(Keys.TYPE, Id.database.type_public);
+        values.put(Keys.IS_MASTER_KEY, key.isMasterKey());
+        values.put(Keys.ALGORITHM, key.getAlgorithm());
+        values.put(Keys.KEY_SIZE, key.getBitStrength());
+        values.put(Keys.CAN_SIGN, Apg.isSigningKey(key));
+        values.put(Keys.CAN_ENCRYPT, Apg.isEncryptionKey(key));
+        values.put(Keys.IS_REVOKED, key.isRevoked());
+        values.put(Keys.CREATION, Apg.getCreationDate(key).getTime() / 1000);
+        Date expiryDate = Apg.getExpiryDate(key);
+        if (expiryDate != null) {
+            values.put(Keys.EXPIRY, expiryDate.getTime() / 1000);
+        }
+        values.put(Keys.KEY_RING_ID, keyRingId);
+        values.put(Keys.KEY_DATA, key.getEncoded());
+        values.put(Keys.RANK, rank);
+
+        long rowId = insertOrUpdateKey(values);
+
+        if (rowId == -1) {
+            throw new GeneralException("saving public key " + key.getKeyID() + " failed");
+        }
+
+        Vector<Integer> seenIds = new Vector<Integer>();
+        int userIdRank = 0;
+        for (String userId : new IterableIterator<String>(key.getUserIDs())) {
+            seenIds.add(saveUserId(rowId, userId, userIdRank));
+            ++userIdRank;
+        }
+
+        String seenIdsStr = "";
+        for (Integer id : seenIds) {
+            if (seenIdsStr.length() > 0) {
+                seenIdsStr += ",";
+            }
+            seenIdsStr += id;
+        }
+        mDb.delete(UserIds.TABLE_NAME,
+                   UserIds.KEY_ID + " = ? AND " +
+                   UserIds._ID + " NOT IN (" + seenIdsStr + ")",
+                   new String[] { "" + rowId });
+
+        return (int)rowId;
+    }
+
+    private int saveKey(long keyRingId, PGPSecretKey key, int rank)
+            throws IOException, GeneralException {
+        ContentValues values = new ContentValues();
+
+        values.put(Keys.KEY_ID, key.getPublicKey().getKeyID());
+        values.put(Keys.TYPE, Id.database.type_secret);
+        values.put(Keys.IS_MASTER_KEY, key.isMasterKey());
+        values.put(Keys.ALGORITHM, key.getPublicKey().getAlgorithm());
+        values.put(Keys.KEY_SIZE, key.getPublicKey().getBitStrength());
+        values.put(Keys.CAN_SIGN, Apg.isSigningKey(key));
+        values.put(Keys.CAN_ENCRYPT, Apg.isEncryptionKey(key));
+        values.put(Keys.IS_REVOKED, key.getPublicKey().isRevoked());
+        values.put(Keys.CREATION, Apg.getCreationDate(key).getTime() / 1000);
+        Date expiryDate = Apg.getExpiryDate(key);
+        if (expiryDate != null) {
+            values.put(Keys.EXPIRY, expiryDate.getTime() / 1000);
+        }
+        values.put(Keys.KEY_RING_ID, keyRingId);
+        values.put(Keys.KEY_DATA, key.getEncoded());
+        values.put(Keys.RANK, rank);
+
+        long rowId = insertOrUpdateKey(values);
+
+        if (rowId == -1) {
+            throw new GeneralException("saving secret key " + key.getPublicKey().getKeyID() + " failed");
+        }
+
+        Vector<Integer> seenIds = new Vector<Integer>();
+        int userIdRank = 0;
+        for (String userId : new IterableIterator<String>(key.getUserIDs())) {
+            seenIds.add(saveUserId(rowId, userId, userIdRank));
+            ++userIdRank;
+        }
+
+        String seenIdsStr = "";
+        for (Integer id : seenIds) {
+            if (seenIdsStr.length() > 0) {
+                seenIdsStr += ",";
+            }
+            seenIdsStr += id;
+        }
+        mDb.delete(UserIds.TABLE_NAME,
+                   UserIds.KEY_ID + " = ? AND " +
+                   UserIds._ID + " NOT IN (" + seenIdsStr + ")",
+                   new String[] { "" + rowId });
+
+        return (int)rowId;
+    }
+
+    private int saveUserId(long keyId, String userId, int rank) throws GeneralException {
+        ContentValues values = new ContentValues();
+
+        values.put(UserIds.KEY_ID, keyId);
+        values.put(UserIds.USER_ID, userId);
+        values.put(UserIds.RANK, rank);
+
+        long rowId = insertOrUpdateUserId(values);
+
+        if (rowId == -1) {
+            throw new GeneralException("saving user id " + userId + " failed");
+        }
+
+        return (int)rowId;
+    }
+
+    private long insertOrUpdateKeyRing(ContentValues values) {
+        Cursor c = mDb.query(KeyRings.TABLE_NAME, new String[] { KeyRings._ID },
+                             KeyRings.MASTER_KEY_ID + " = ? AND " + KeyRings.TYPE + " = ?",
+                             new String[] {
+                                 values.getAsString(KeyRings.MASTER_KEY_ID),
+                                 values.getAsString(KeyRings.TYPE),
+                             },
+                             null, null, null);
+        long rowId = -1;
+        if (c != null && c.moveToFirst()) {
+            rowId = c.getLong(0);
+            mDb.update(KeyRings.TABLE_NAME, values,
+                       KeyRings._ID + " = ?", new String[] { "" + rowId });
+            mStatus = Id.return_value.updated;
+        } else {
+            rowId = mDb.insert(KeyRings.TABLE_NAME, KeyRings.WHO_ID, values);
+            mStatus = Id.return_value.ok;
+        }
+
+        if (c != null) {
+            c.close();
+        }
+
+        return rowId;
+    }
+
+    private long insertOrUpdateKey(ContentValues values) {
+        Cursor c = mDb.query(Keys.TABLE_NAME, new String[] { Keys._ID },
+                             Keys.KEY_ID + " = ? AND " + Keys.TYPE + " = ?",
+                             new String[] {
+                                 values.getAsString(Keys.KEY_ID),
+                                 values.getAsString(Keys.TYPE),
+                             },
+                             null, null, null);
+        long rowId = -1;
+        if (c != null && c.moveToFirst()) {
+            rowId = c.getLong(0);
+            mDb.update(Keys.TABLE_NAME, values,
+                       Keys._ID + " = ?", new String[] { "" + rowId });
+        } else {
+            rowId = mDb.insert(Keys.TABLE_NAME, Keys.KEY_DATA, values);
+        }
+
+        if (c != null) {
+            c.close();
+        }
+
+        return rowId;
+    }
+
+    private long insertOrUpdateUserId(ContentValues values) {
+        Cursor c = mDb.query(UserIds.TABLE_NAME, new String[] { UserIds._ID },
+                             UserIds.KEY_ID + " = ? AND " + UserIds.USER_ID + " = ?",
+                             new String[] {
+                                 values.getAsString(UserIds.KEY_ID),
+                                 values.getAsString(UserIds.USER_ID),
+                             },
+                             null, null, null);
+        long rowId = -1;
+        if (c != null && c.moveToFirst()) {
+            rowId = c.getLong(0);
+            mDb.update(UserIds.TABLE_NAME, values,
+                       UserIds._ID + " = ?", new String[] { "" + rowId });
+        } else {
+            rowId = mDb.insert(UserIds.TABLE_NAME, UserIds.USER_ID, values);
+        }
+
+        if (c != null) {
+            c.close();
+        }
+
+        return rowId;
+    }
+
+    public Object getKeyRing(int keyRingId) {
+        Cursor c = mDb.query(KeyRings.TABLE_NAME,
+                             new String[] { KeyRings.KEY_RING_DATA, KeyRings.TYPE },
+                             KeyRings._ID + " = ?",
+                             new String[] {
+                                 "" + keyRingId,
+                             },
+                             null, null, null);
+        byte[] data = null;
+        Object keyRing = null;
+        if (c != null && c.moveToFirst()) {
+            data = c.getBlob(0);
+            if (data != null) {
+                try {
+                    if (c.getInt(1) == Id.database.type_public) {
+                        keyRing = new PGPPublicKeyRing(data);
+                    } else {
+                        keyRing = new PGPSecretKeyRing(data);
+                    }
+                } catch (IOException e) {
+                    // can't load it, then
+                } catch (PGPException e) {
+                    // can't load it, then
+                }
+            }
+        }
+
+        if (c != null) {
+            c.close();
+        }
+
+        return keyRing;
+    }
+
+    public byte[] getKeyRingDataFromKeyId(int type, long keyId) {
+        Cursor c = mDb.query(Keys.TABLE_NAME + " INNER JOIN " + KeyRings.TABLE_NAME + " ON (" +
+                             KeyRings.TABLE_NAME + "." + KeyRings._ID + " = " +
+                             Keys.TABLE_NAME + "." + Keys.KEY_RING_ID + ")",
+                             new String[] { KeyRings.TABLE_NAME + "." + KeyRings.KEY_RING_DATA },
+                             Keys.TABLE_NAME + "." + Keys.KEY_ID + " = ? AND " +
+                             KeyRings.TABLE_NAME + "." + KeyRings.TYPE + " = ?",
+                             new String[] {
+                                 "" + keyId,
+                                 "" + type,
+                             },
+                             null, null, null);
+
+        byte[] data = null;
+        if (c != null && c.moveToFirst()) {
+            data = c.getBlob(0);
+        }
+
+        if (c != null) {
+            c.close();
+        }
+
+        return data;
+    }
+
+    public byte[] getKeyDataFromKeyId(int type, long keyId) {
+        Cursor c = mDb.query(Keys.TABLE_NAME, new String[] { Keys.KEY_DATA },
+                             Keys.KEY_ID + " = ? AND " + Keys.TYPE + " = ?",
+                             new String[] {
+                                 "" + keyId,
+                                 "" + type,
+                             },
+                             null, null, null);
+        byte[] data = null;
+        if (c != null && c.moveToFirst()) {
+            data = c.getBlob(0);
+        }
+
+        if (c != null) {
+            c.close();
+        }
+
+        return data;
+    }
+
+    public void deleteKeyRing(int keyRingId) {
+        mDb.beginTransaction();
+        mDb.delete(KeyRings.TABLE_NAME,
+                   KeyRings._ID + " = ?", new String[] { "" + keyRingId });
+
+        Cursor c = mDb.query(Keys.TABLE_NAME, new String[] { Keys._ID },
+                             Keys.KEY_RING_ID + " = ?",
+                             new String[] {
+                                 "" + keyRingId,
+                             },
+                                    null, null, null);
+        if (c != null && c.moveToFirst()) {
+            do {
+                int keyId = c.getInt(0);
+                deleteKey(keyId);
+            } while (c.moveToNext());
+        }
+
+        if (c != null) {
+            c.close();
+        }
+
+        mDb.setTransactionSuccessful();
+        mDb.endTransaction();
+    }
+
+    private void deleteKey(int keyId) {
+        mDb.delete(Keys.TABLE_NAME,
+                   Keys._ID + " = ?", new String[] { "" + keyId });
+
+        mDb.delete(UserIds.TABLE_NAME,
+                   UserIds.KEY_ID + " = ?", new String[] { "" + keyId });
+    }
+
+    public SQLiteDatabase db() {
+        return mDb;
+    }
+}

org_apg/src/org/thialfihar/android/apg/provider/KeyRings.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.provider;
+
+import android.provider.BaseColumns;
+
+public class KeyRings implements BaseColumns {
+    public static final String TABLE_NAME = "key_rings";
+
+    public static final String _ID_type = "INTEGER PRIMARY KEY";
+    public static final String MASTER_KEY_ID = "c_master_key_id";
+    public static final String MASTER_KEY_ID_type = "INT64";
+    public static final String TYPE = "c_type";
+    public static final String TYPE_type = "INTEGER";
+    public static final String WHO_ID = "c_who_id";
+    public static final String WHO_ID_type = "INTEGER";
+    public static final String KEY_RING_DATA = "c_key_ring_data";
+    public static final String KEY_RING_DATA_type = "BLOB";
+}

org_apg/src/org/thialfihar/android/apg/provider/Keys.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.provider;
+
+import android.provider.BaseColumns;
+
+public class Keys implements BaseColumns {
+    public static final String TABLE_NAME = "keys";
+
+    public static final String _ID_type = "INTEGER PRIMARY KEY";
+    public static final String KEY_ID = "c_key_id";
+    public static final String KEY_ID_type = "INT64";
+    public static final String TYPE = "c_type";
+    public static final String TYPE_type = "INTEGER";
+    public static final String IS_MASTER_KEY = "c_is_master_key";
+    public static final String IS_MASTER_KEY_type = "INTEGER";
+    public static final String ALGORITHM = "c_algorithm";
+    public static final String ALGORITHM_type = "INTEGER";
+    public static final String KEY_SIZE = "c_key_size";
+    public static final String KEY_SIZE_type = "INTEGER";
+    public static final String CAN_SIGN = "c_can_sign";
+    public static final String CAN_SIGN_type = "INTEGER";
+    public static final String CAN_ENCRYPT = "c_can_encrypt";
+    public static final String CAN_ENCRYPT_type = "INTEGER";
+    public static final String IS_REVOKED = "c_is_revoked";
+    public static final String IS_REVOKED_type = "INTEGER";
+    public static final String CREATION = "c_creation";
+    public static final String CREATION_type = "INTEGER";
+    public static final String EXPIRY = "c_expiry";
+    public static final String EXPIRY_type = "INTEGER";
+    public static final String KEY_RING_ID = "c_key_ring_id";
+    public static final String KEY_RING_ID_type = "INTEGER";
+    public static final String KEY_DATA = "c_key_data";
+    public static final String KEY_DATA_type = "BLOB";
+    public static final String RANK = "c_key_data";
+    public static final String RANK_type = "INTEGER";
+}

org_apg/src/org/thialfihar/android/apg/provider/UserIds.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.provider;
+
+import android.provider.BaseColumns;
+
+public class UserIds implements BaseColumns {
+    public static final String TABLE_NAME = "user_ids";
+
+    public static final String _ID_type = "INTEGER PRIMARY KEY";
+    public static final String KEY_ID = "c_key_id";
+    public static final String KEY_ID_type = "INTEGER";
+    public static final String USER_ID = "c_user_id";
+    public static final String USER_ID_type = "TEXT";
+    public static final String RANK = "c_rank";
+    public static final String RANK_type = "INTEGER";
+}

org_apg/src/org/thialfihar/android/apg/service/ApgService.java

@@ -0,0 +1,12 @@
+
+/**
+ * TODO:
+ * - Reimplement all the threads in the activitys as intents in this intentService
+ * - This IntentService stopps itself after an action is executed
+ */
+
+package org.thialfihar.android.apg.service;
+
+public class ApgService {
+
+}

org_apg/src/org/thialfihar/android/apg/ui/AboutActivity.java

@@ -0,0 +1,65 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Constants;
+
+import android.app.Activity;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.os.Bundle;
+import android.util.Log;
+import android.widget.TextView;
+
+public class AboutActivity extends Activity {
+    Activity mActivity;
+
+    /**
+     * Instantiate View for this Activity
+     */
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.about_activity);
+
+        mActivity = this;
+
+        TextView versionText = (TextView) findViewById(R.id.about_version);
+        versionText.setText(getString(R.string.about_version) + " " + getVersion());
+    }
+
+    /**
+     * Get the current package version.
+     * 
+     * @return The current version.
+     */
+    private String getVersion() {
+        String result = "";
+        try {
+            PackageManager manager = mActivity.getPackageManager();
+            PackageInfo info = manager.getPackageInfo(mActivity.getPackageName(), 0);
+
+            result = String.format("%s (%s)", info.versionName, info.versionCode);
+        } catch (NameNotFoundException e) {
+            Log.w(Constants.TAG, "Unable to get application version: " + e.getMessage());
+            result = "Unable to get application version.";
+        }
+
+        return result;
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/BaseActivity.java

@@ -0,0 +1,408 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.AskForSecretKeyPassPhrase;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.PausableThread;
+import org.thialfihar.android.apg.Preferences;
+import org.thialfihar.android.apg.ProgressDialogUpdater;
+import org.thialfihar.android.apg.Service;
+
+import com.actionbarsherlock.app.ActionBar;
+import com.actionbarsherlock.app.SherlockActivity;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.ProgressDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Environment;
+import android.os.Handler;
+import android.os.Message;
+import android.widget.Toast;
+
+public class BaseActivity extends SherlockActivity implements Runnable, ProgressDialogUpdater,
+        AskForSecretKeyPassPhrase.PassPhraseCallbackInterface {
+
+    private ProgressDialog mProgressDialog = null;
+    private PausableThread mRunningThread = null;
+    private Thread mDeletingThread = null;
+
+    private long mSecretKeyId = 0;
+    private String mDeleteFile = null;
+
+    protected Preferences mPreferences;
+
+    private Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message msg) {
+            handlerCallback(msg);
+        }
+    };
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        final ActionBar actionBar = getSupportActionBar();
+        actionBar.setDisplayShowTitleEnabled(true);
+        actionBar.setDisplayHomeAsUpEnabled(true);
+
+        mPreferences = Preferences.getPreferences(this);
+
+        Apg.initialize(this);
+
+        if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
+            File dir = new File(Constants.path.APP_DIR);
+            if (!dir.exists() && !dir.mkdirs()) {
+                // ignore this for now, it's not crucial
+                // that the directory doesn't exist at this point
+            }
+        }
+
+        startCacheService(this, mPreferences);
+    }
+
+    public static void startCacheService(Activity activity, Preferences preferences) {
+        Intent intent = new Intent(activity, Service.class);
+        intent.putExtra(Service.EXTRA_TTL, preferences.getPassPhraseCacheTtl());
+        activity.startService(intent);
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case android.R.id.home:
+            startActivity(new Intent(this, MainActivity.class));
+            return true;
+
+            // TODO: needed?:
+        case Id.menu.option.search:
+            startSearch("", false, null, false);
+            return true;
+
+        default:
+            break;
+
+        }
+        return false;
+    }
+
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        // in case it is a progress dialog
+        mProgressDialog = new ProgressDialog(this);
+        mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
+        mProgressDialog.setCancelable(false);
+        switch (id) {
+        case Id.dialog.encrypting: {
+            mProgressDialog.setMessage(this.getString(R.string.progress_initializing));
+            return mProgressDialog;
+        }
+
+        case Id.dialog.decrypting: {
+            mProgressDialog.setMessage(this.getString(R.string.progress_initializing));
+            return mProgressDialog;
+        }
+
+        case Id.dialog.saving: {
+            mProgressDialog.setMessage(this.getString(R.string.progress_saving));
+            return mProgressDialog;
+        }
+
+        case Id.dialog.importing: {
+            mProgressDialog.setMessage(this.getString(R.string.progress_importing));
+            return mProgressDialog;
+        }
+
+        case Id.dialog.exporting: {
+            mProgressDialog.setMessage(this.getString(R.string.progress_exporting));
+            return mProgressDialog;
+        }
+
+        case Id.dialog.deleting: {
+            mProgressDialog.setMessage(this.getString(R.string.progress_initializing));
+            return mProgressDialog;
+        }
+
+        case Id.dialog.querying: {
+            mProgressDialog.setMessage(this.getString(R.string.progress_querying));
+            mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
+            mProgressDialog.setCancelable(false);
+            return mProgressDialog;
+        }
+
+        case Id.dialog.signing: {
+            mProgressDialog.setMessage(this.getString(R.string.progress_signing));
+            mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
+            mProgressDialog.setCancelable(false);
+            return mProgressDialog;
+        }
+
+        default: {
+            break;
+        }
+        }
+        mProgressDialog = null;
+
+        switch (id) {
+
+        case Id.dialog.pass_phrase: {
+            return AskForSecretKeyPassPhrase.createDialog(this, getSecretKeyId(), this);
+        }
+
+        case Id.dialog.pass_phrases_do_not_match: {
+            AlertDialog.Builder alert = new AlertDialog.Builder(this);
+
+            alert.setIcon(android.R.drawable.ic_dialog_alert);
+            alert.setTitle(R.string.error);
+            alert.setMessage(R.string.passPhrasesDoNotMatch);
+
+            alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int id) {
+                    removeDialog(Id.dialog.pass_phrases_do_not_match);
+                }
+            });
+            alert.setCancelable(false);
+
+            return alert.create();
+        }
+
+        case Id.dialog.no_pass_phrase: {
+            AlertDialog.Builder alert = new AlertDialog.Builder(this);
+
+            alert.setIcon(android.R.drawable.ic_dialog_alert);
+            alert.setTitle(R.string.error);
+            alert.setMessage(R.string.passPhraseMustNotBeEmpty);
+
+            alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int id) {
+                    removeDialog(Id.dialog.no_pass_phrase);
+                }
+            });
+            alert.setCancelable(false);
+
+            return alert.create();
+        }
+
+        case Id.dialog.delete_file: {
+            AlertDialog.Builder alert = new AlertDialog.Builder(this);
+
+            alert.setIcon(android.R.drawable.ic_dialog_alert);
+            alert.setTitle(R.string.warning);
+            alert.setMessage(this.getString(R.string.fileDeleteConfirmation, getDeleteFile()));
+
+            alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int id) {
+                    removeDialog(Id.dialog.delete_file);
+                    final File file = new File(getDeleteFile());
+                    showDialog(Id.dialog.deleting);
+                    mDeletingThread = new Thread(new Runnable() {
+                        public void run() {
+                            Bundle data = new Bundle();
+                            data.putInt(Constants.extras.STATUS, Id.message.delete_done);
+                            try {
+                                Apg.deleteFileSecurely(BaseActivity.this, file, BaseActivity.this);
+                            } catch (FileNotFoundException e) {
+                                data.putString(Apg.EXTRA_ERROR, BaseActivity.this.getString(
+                                        R.string.error_fileNotFound, file));
+                            } catch (IOException e) {
+                                data.putString(Apg.EXTRA_ERROR, BaseActivity.this.getString(
+                                        R.string.error_fileDeleteFailed, file));
+                            }
+                            Message msg = new Message();
+                            msg.setData(data);
+                            sendMessage(msg);
+                        }
+                    });
+                    mDeletingThread.start();
+                }
+            });
+            alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int id) {
+                    removeDialog(Id.dialog.delete_file);
+                }
+            });
+            alert.setCancelable(true);
+
+            return alert.create();
+        }
+
+        default: {
+            break;
+        }
+        }
+
+        return super.onCreateDialog(id);
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+        case Id.request.secret_keys: {
+            if (resultCode == RESULT_OK) {
+                Bundle bundle = data.getExtras();
+                setSecretKeyId(bundle.getLong(Apg.EXTRA_KEY_ID));
+            } else {
+                setSecretKeyId(Id.key.none);
+            }
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+
+    public void setProgress(int resourceId, int progress, int max) {
+        setProgress(getString(resourceId), progress, max);
+    }
+
+    public void setProgress(int progress, int max) {
+        Message msg = new Message();
+        Bundle data = new Bundle();
+        data.putInt(Constants.extras.STATUS, Id.message.progress_update);
+        data.putInt(Constants.extras.PROGRESS, progress);
+        data.putInt(Constants.extras.PROGRESS_MAX, max);
+        msg.setData(data);
+        mHandler.sendMessage(msg);
+    }
+
+    public void setProgress(String message, int progress, int max) {
+        Message msg = new Message();
+        Bundle data = new Bundle();
+        data.putInt(Constants.extras.STATUS, Id.message.progress_update);
+        data.putString(Constants.extras.MESSAGE, message);
+        data.putInt(Constants.extras.PROGRESS, progress);
+        data.putInt(Constants.extras.PROGRESS_MAX, max);
+        msg.setData(data);
+        mHandler.sendMessage(msg);
+    }
+
+    public void handlerCallback(Message msg) {
+        Bundle data = msg.getData();
+        if (data == null) {
+            return;
+        }
+
+        int type = data.getInt(Constants.extras.STATUS);
+        switch (type) {
+        case Id.message.progress_update: {
+            String message = data.getString(Constants.extras.MESSAGE);
+            if (mProgressDialog != null) {
+                if (message != null) {
+                    mProgressDialog.setMessage(message);
+                }
+                mProgressDialog.setMax(data.getInt(Constants.extras.PROGRESS_MAX));
+                mProgressDialog.setProgress(data.getInt(Constants.extras.PROGRESS));
+            }
+            break;
+        }
+
+        case Id.message.delete_done: {
+            mProgressDialog = null;
+            deleteDoneCallback(msg);
+            break;
+        }
+
+        case Id.message.import_done: // intentionally no break
+        case Id.message.export_done: // intentionally no break
+        case Id.message.query_done: // intentionally no break
+        case Id.message.done: {
+            mProgressDialog = null;
+            doneCallback(msg);
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+    }
+
+    public void doneCallback(Message msg) {
+
+    }
+
+    public void deleteDoneCallback(Message msg) {
+        removeDialog(Id.dialog.deleting);
+        mDeletingThread = null;
+
+        Bundle data = msg.getData();
+        String error = data.getString(Apg.EXTRA_ERROR);
+        String message;
+        if (error != null) {
+            message = getString(R.string.errorMessage, error);
+        } else {
+            message = getString(R.string.fileDeleteSuccessful);
+        }
+
+        Toast.makeText(this, message, Toast.LENGTH_SHORT).show();
+    }
+
+    public void passPhraseCallback(long keyId, String passPhrase) {
+        Apg.setCachedPassPhrase(keyId, passPhrase);
+    }
+
+    public void sendMessage(Message msg) {
+        mHandler.sendMessage(msg);
+    }
+
+    public PausableThread getRunningThread() {
+        return mRunningThread;
+    }
+
+    public void startThread() {
+        mRunningThread = new PausableThread(this);
+        mRunningThread.start();
+    }
+
+    public void run() {
+
+    }
+
+    public void setSecretKeyId(long id) {
+        mSecretKeyId = id;
+    }
+
+    public long getSecretKeyId() {
+        return mSecretKeyId;
+    }
+
+    protected void setDeleteFile(String deleteFile) {
+        mDeleteFile = deleteFile;
+    }
+
+    protected String getDeleteFile() {
+        return mDeleteFile;
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/DecryptActivity.java

@@ -0,0 +1,864 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.spongycastle.jce.provider.BouncyCastleProvider;
+import org.spongycastle.openpgp.PGPException;
+import org.spongycastle.openpgp.PGPPublicKeyRing;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.DataDestination;
+import org.thialfihar.android.apg.DataSource;
+import org.thialfihar.android.apg.FileDialog;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.InputData;
+import org.thialfihar.android.apg.PausableThread;
+import org.thialfihar.android.apg.provider.DataProvider;
+import org.thialfihar.android.apg.util.Compatibility;
+import org.thialfihar.android.apg.R;
+
+import com.actionbarsherlock.app.ActionBar;
+import com.actionbarsherlock.view.Menu;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.ActivityNotFoundException;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Message;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.animation.AnimationUtils;
+import android.widget.CheckBox;
+import android.widget.EditText;
+import android.widget.ImageButton;
+import android.widget.ImageView;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+import android.widget.Toast;
+import android.widget.ViewFlipper;
+
+import java.io.ByteArrayOutputStream;
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.security.Security;
+import java.security.SignatureException;
+import java.util.regex.Matcher;
+
+public class DecryptActivity extends BaseActivity {
+    private long mSignatureKeyId = 0;
+
+    private Intent mIntent;
+
+    private boolean mReturnResult = false;
+    private String mReplyTo = null;
+    private String mSubject = null;
+    private boolean mSignedOnly = false;
+    private boolean mAssumeSymmetricEncryption = false;
+
+    private EditText mMessage = null;
+    private LinearLayout mSignatureLayout = null;
+    private ImageView mSignatureStatusImage = null;
+    private TextView mUserId = null;
+    private TextView mUserIdRest = null;
+
+    private ViewFlipper mSource = null;
+    private TextView mSourceLabel = null;
+    private ImageView mSourcePrevious = null;
+    private ImageView mSourceNext = null;
+
+    // private Button mDecryptButton = null;
+    // private Button mReplyButton = null;
+
+    private boolean mDecryptEnabled = true;
+    private String mDecryptString = "";
+    private boolean mReplyEnabled = true;
+    private String mReplyString = "";
+
+    private int mDecryptTarget;
+
+    private EditText mFilename = null;
+    private CheckBox mDeleteAfter = null;
+    private ImageButton mBrowse = null;
+
+    private String mInputFilename = null;
+    private String mOutputFilename = null;
+
+    private Uri mContentUri = null;
+    private byte[] mData = null;
+    private boolean mReturnBinary = false;
+
+    private DataSource mDataSource = null;
+    private DataDestination mDataDestination = null;
+
+    private long mUnknownSignatureKeyId = 0;
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+
+        if (mDecryptEnabled) {
+            menu.add(1, Id.menu.option.decrypt, 0, mDecryptString).setShowAsAction(
+                    MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        }
+        if (mReplyEnabled) {
+            menu.add(1, Id.menu.option.reply, 1, mReplyString).setShowAsAction(
+                    MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        }
+
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+        case Id.menu.option.decrypt: {
+            decryptClicked();
+
+            return true;
+        }
+        case Id.menu.option.reply: {
+            replyClicked();
+
+            return true;
+        }
+
+        default: {
+            return super.onOptionsItemSelected(item);
+        }
+        }
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.decrypt);
+
+        mSource = (ViewFlipper) findViewById(R.id.source);
+        mSourceLabel = (TextView) findViewById(R.id.sourceLabel);
+        mSourcePrevious = (ImageView) findViewById(R.id.sourcePrevious);
+        mSourceNext = (ImageView) findViewById(R.id.sourceNext);
+
+        mSourcePrevious.setClickable(true);
+        mSourcePrevious.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                mSource.setInAnimation(AnimationUtils.loadAnimation(DecryptActivity.this,
+                        R.anim.push_right_in));
+                mSource.setOutAnimation(AnimationUtils.loadAnimation(DecryptActivity.this,
+                        R.anim.push_right_out));
+                mSource.showPrevious();
+                updateSource();
+            }
+        });
+
+        mSourceNext.setClickable(true);
+        OnClickListener nextSourceClickListener = new OnClickListener() {
+            public void onClick(View v) {
+                mSource.setInAnimation(AnimationUtils.loadAnimation(DecryptActivity.this,
+                        R.anim.push_left_in));
+                mSource.setOutAnimation(AnimationUtils.loadAnimation(DecryptActivity.this,
+                        R.anim.push_left_out));
+                mSource.showNext();
+                updateSource();
+            }
+        };
+        mSourceNext.setOnClickListener(nextSourceClickListener);
+
+        mSourceLabel.setClickable(true);
+        mSourceLabel.setOnClickListener(nextSourceClickListener);
+
+        mMessage = (EditText) findViewById(R.id.message);
+        mSignatureLayout = (LinearLayout) findViewById(R.id.signature);
+        mSignatureStatusImage = (ImageView) findViewById(R.id.ic_signature_status);
+        mUserId = (TextView) findViewById(R.id.mainUserId);
+        mUserIdRest = (TextView) findViewById(R.id.mainUserIdRest);
+
+        // measure the height of the source_file view and set the message view's min height to that,
+        // so it fills mSource fully... bit of a hack.
+        View tmp = findViewById(R.id.sourceFile);
+        tmp.measure(View.MeasureSpec.UNSPECIFIED, View.MeasureSpec.UNSPECIFIED);
+        int height = tmp.getMeasuredHeight();
+        mMessage.setMinimumHeight(height);
+
+        mFilename = (EditText) findViewById(R.id.filename);
+        mBrowse = (ImageButton) findViewById(R.id.btn_browse);
+        mBrowse.setOnClickListener(new View.OnClickListener() {
+            public void onClick(View v) {
+                openFile();
+            }
+        });
+
+        mDeleteAfter = (CheckBox) findViewById(R.id.deleteAfterDecryption);
+
+        // default: message source
+        mSource.setInAnimation(null);
+        mSource.setOutAnimation(null);
+        while (mSource.getCurrentView().getId() != R.id.sourceMessage) {
+            mSource.showNext();
+        }
+
+        mIntent = getIntent();
+        if (Intent.ACTION_VIEW.equals(mIntent.getAction())) {
+            Uri uri = mIntent.getData();
+            try {
+                InputStream attachment = getContentResolver().openInputStream(uri);
+                ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
+                byte bytes[] = new byte[1 << 16];
+                int length;
+                while ((length = attachment.read(bytes)) > 0) {
+                    byteOut.write(bytes, 0, length);
+                }
+                byteOut.close();
+                String data = new String(byteOut.toByteArray());
+                mMessage.setText(data);
+            } catch (FileNotFoundException e) {
+                // ignore, then
+            } catch (IOException e) {
+                // ignore, then
+            }
+        } else if (Apg.Intent.DECRYPT.equals(mIntent.getAction())) {
+            Log.d(Constants.TAG, "Apg Intent DECRYPT startet");
+            Bundle extras = mIntent.getExtras();
+            if (extras == null) {
+                Log.d(Constants.TAG, "extra bundle was null");
+                extras = new Bundle();
+            } else {
+                Log.d(Constants.TAG, "got extras");
+            }
+
+            mData = extras.getByteArray(Apg.EXTRA_DATA);
+            String textData = null;
+            if (mData == null) {
+                Log.d(Constants.TAG, "EXTRA_DATA was null");
+                textData = extras.getString(Apg.EXTRA_TEXT);
+            } else {
+                Log.d(Constants.TAG, "Got data from EXTRA_DATA");
+            }
+            if (textData != null) {
+                Log.d(Constants.TAG, "textData null, matching text ...");
+                Matcher matcher = Apg.PGP_MESSAGE.matcher(textData);
+                if (matcher.matches()) {
+                    Log.d(Constants.TAG, "PGP_MESSAGE matched");
+                    textData = matcher.group(1);
+                    // replace non breakable spaces
+                    textData = textData.replaceAll("\\xa0", " ");
+                    mMessage.setText(textData);
+                } else {
+                    matcher = Apg.PGP_SIGNED_MESSAGE.matcher(textData);
+                    if (matcher.matches()) {
+                        Log.d(Constants.TAG, "PGP_SIGNED_MESSAGE matched");
+                        textData = matcher.group(1);
+                        // replace non breakable spaces
+                        textData = textData.replaceAll("\\xa0", " ");
+                        mMessage.setText(textData);
+                        
+                        mDecryptString = getString(R.string.btn_verify);
+                        // build new action bar
+                        invalidateOptionsMenu();
+                    } else {
+                        Log.d(Constants.TAG, "Nothing matched!");
+                    }
+                }
+            }
+            mReplyTo = extras.getString(Apg.EXTRA_REPLY_TO);
+            mSubject = extras.getString(Apg.EXTRA_SUBJECT);
+        } else if (Apg.Intent.DECRYPT_FILE.equals(mIntent.getAction())) {
+            mInputFilename = mIntent.getDataString();
+            if ("file".equals(mIntent.getScheme())) {
+                mInputFilename = Uri.decode(mInputFilename.substring(7));
+            }
+            mFilename.setText(mInputFilename);
+            guessOutputFilename();
+            mSource.setInAnimation(null);
+            mSource.setOutAnimation(null);
+            while (mSource.getCurrentView().getId() != R.id.sourceFile) {
+                mSource.showNext();
+            }
+        } else if (Apg.Intent.DECRYPT_AND_RETURN.equals(mIntent.getAction())) {
+            mContentUri = mIntent.getData();
+            Bundle extras = mIntent.getExtras();
+            if (extras == null) {
+                extras = new Bundle();
+            }
+
+            // disable home button on actionbar because this activity is run from another app
+            final ActionBar actionBar = getSupportActionBar();
+            actionBar.setDisplayShowTitleEnabled(true);
+            actionBar.setDisplayHomeAsUpEnabled(false);
+            actionBar.setHomeButtonEnabled(false);
+
+            mReturnBinary = extras.getBoolean(Apg.EXTRA_BINARY, false);
+
+            if (mContentUri == null) {
+                mData = extras.getByteArray(Apg.EXTRA_DATA);
+                String data = extras.getString(Apg.EXTRA_TEXT);
+                if (data != null) {
+                    Matcher matcher = Apg.PGP_MESSAGE.matcher(data);
+                    if (matcher.matches()) {
+                        data = matcher.group(1);
+                        // replace non breakable spaces
+                        data = data.replaceAll("\\xa0", " ");
+                        mMessage.setText(data);
+                    } else {
+                        matcher = Apg.PGP_SIGNED_MESSAGE.matcher(data);
+                        if (matcher.matches()) {
+                            data = matcher.group(1);
+                            // replace non breakable spaces
+                            data = data.replaceAll("\\xa0", " ");
+                            mMessage.setText(data);
+                            mDecryptString = getString(R.string.btn_verify);
+
+                            // build new action bar
+                            invalidateOptionsMenu();
+                        }
+                    }
+                }
+            }
+            mReturnResult = true;
+        }
+
+        if (mSource.getCurrentView().getId() == R.id.sourceMessage
+                && mMessage.getText().length() == 0) {
+
+            CharSequence clipboardText = Compatibility.getClipboardText(this);
+
+            String data = "";
+            if (clipboardText != null) {
+                Matcher matcher = Apg.PGP_MESSAGE.matcher(clipboardText);
+                if (!matcher.matches()) {
+                    matcher = Apg.PGP_SIGNED_MESSAGE.matcher(clipboardText);
+                }
+                if (matcher.matches()) {
+                    data = matcher.group(1);
+                    mMessage.setText(data);
+                    Toast.makeText(this, R.string.usingClipboardContent, Toast.LENGTH_SHORT).show();
+                }
+            }
+        }
+
+        mSignatureLayout.setVisibility(View.GONE);
+        mSignatureLayout.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                if (mSignatureKeyId == 0) {
+                    return;
+                }
+                PGPPublicKeyRing key = Apg.getPublicKeyRing(mSignatureKeyId);
+                if (key != null) {
+                    Intent intent = new Intent(DecryptActivity.this, KeyServerQueryActivity.class);
+                    intent.setAction(Apg.Intent.LOOK_UP_KEY_ID);
+                    intent.putExtra(Apg.EXTRA_KEY_ID, mSignatureKeyId);
+                    startActivity(intent);
+                }
+            }
+        });
+
+        mReplyEnabled = false;
+
+        // build new actionbar
+        invalidateOptionsMenu();
+
+        if (mReturnResult) {
+            mSourcePrevious.setClickable(false);
+            mSourcePrevious.setEnabled(false);
+            mSourcePrevious.setVisibility(View.INVISIBLE);
+
+            mSourceNext.setClickable(false);
+            mSourceNext.setEnabled(false);
+            mSourceNext.setVisibility(View.INVISIBLE);
+
+            mSourceLabel.setClickable(false);
+            mSourceLabel.setEnabled(false);
+        }
+
+        updateSource();
+
+        if (mSource.getCurrentView().getId() == R.id.sourceMessage
+                && (mMessage.getText().length() > 0 || mData != null || mContentUri != null)) {
+            decryptClicked();
+        }
+    }
+
+    private void openFile() {
+        String filename = mFilename.getText().toString();
+
+        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+        intent.addCategory(Intent.CATEGORY_OPENABLE);
+
+        intent.setData(Uri.parse("file://" + filename));
+        intent.setType("*/*");
+
+        try {
+            startActivityForResult(intent, Id.request.filename);
+        } catch (ActivityNotFoundException e) {
+            // No compatible file manager was found.
+            Toast.makeText(this, R.string.noFilemanagerInstalled, Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    private void guessOutputFilename() {
+        mInputFilename = mFilename.getText().toString();
+        File file = new File(mInputFilename);
+        String filename = file.getName();
+        if (filename.endsWith(".asc") || filename.endsWith(".gpg") || filename.endsWith(".pgp")) {
+            filename = filename.substring(0, filename.length() - 4);
+        }
+        mOutputFilename = Constants.path.APP_DIR + "/" + filename;
+    }
+
+    private void updateSource() {
+        switch (mSource.getCurrentView().getId()) {
+        case R.id.sourceFile: {
+            mSourceLabel.setText(R.string.label_file);
+            mDecryptString = getString(R.string.btn_decrypt);
+
+            // build new action bar
+            invalidateOptionsMenu();
+            break;
+        }
+
+        case R.id.sourceMessage: {
+            mSourceLabel.setText(R.string.label_message);
+            mDecryptString = getString(R.string.btn_decrypt);
+
+            // build new action bar
+            invalidateOptionsMenu();
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+    }
+
+    private void decryptClicked() {
+        if (mSource.getCurrentView().getId() == R.id.sourceFile) {
+            mDecryptTarget = Id.target.file;
+        } else {
+            mDecryptTarget = Id.target.message;
+        }
+        initiateDecryption();
+    }
+
+    private void initiateDecryption() {
+        if (mDecryptTarget == Id.target.file) {
+            String currentFilename = mFilename.getText().toString();
+            if (mInputFilename == null || !mInputFilename.equals(currentFilename)) {
+                guessOutputFilename();
+            }
+
+            if (mInputFilename.equals("")) {
+                Toast.makeText(this, R.string.noFileSelected, Toast.LENGTH_SHORT).show();
+                return;
+            }
+
+            if (mInputFilename.startsWith("file")) {
+                File file = new File(mInputFilename);
+                if (!file.exists() || !file.isFile()) {
+                    Toast.makeText(
+                            this,
+                            getString(R.string.errorMessage, getString(R.string.error_fileNotFound)),
+                            Toast.LENGTH_SHORT).show();
+                    return;
+                }
+            }
+        }
+
+        if (mDecryptTarget == Id.target.message) {
+            String messageData = mMessage.getText().toString();
+            Matcher matcher = Apg.PGP_SIGNED_MESSAGE.matcher(messageData);
+            if (matcher.matches()) {
+                mSignedOnly = true;
+                decryptStart();
+                return;
+            }
+        }
+
+        // else treat it as an decrypted message/file
+        mSignedOnly = false;
+        String error = null;
+        fillDataSource();
+        try {
+            InputData in = mDataSource.getInputData(this, false);
+            try {
+                setSecretKeyId(Apg.getDecryptionKeyId(this, in));
+                if (getSecretKeyId() == Id.key.none) {
+                    throw new Apg.GeneralException(getString(R.string.error_noSecretKeyFound));
+                }
+                mAssumeSymmetricEncryption = false;
+            } catch (Apg.NoAsymmetricEncryptionException e) {
+                setSecretKeyId(Id.key.symmetric);
+                in = mDataSource.getInputData(this, false);
+                if (!Apg.hasSymmetricEncryption(this, in)) {
+                    throw new Apg.GeneralException(getString(R.string.error_noKnownEncryptionFound));
+                }
+                mAssumeSymmetricEncryption = true;
+            }
+
+            if (getSecretKeyId() == Id.key.symmetric
+                    || Apg.getCachedPassPhrase(getSecretKeyId()) == null) {
+                showDialog(Id.dialog.pass_phrase);
+            } else {
+                if (mDecryptTarget == Id.target.file) {
+                    askForOutputFilename();
+                } else {
+                    decryptStart();
+                }
+            }
+        } catch (FileNotFoundException e) {
+            error = getString(R.string.error_fileNotFound);
+        } catch (IOException e) {
+            error = "" + e;
+        } catch (Apg.GeneralException e) {
+            error = "" + e;
+        }
+        if (error != null) {
+            Toast.makeText(this, getString(R.string.errorMessage, error), Toast.LENGTH_SHORT)
+                    .show();
+        }
+    }
+
+    private void replyClicked() {
+        Intent intent = new Intent(this, EncryptActivity.class);
+        intent.setAction(Apg.Intent.ENCRYPT);
+        String data = mMessage.getText().toString();
+        data = data.replaceAll("(?m)^", "> ");
+        data = "\n\n" + data;
+        intent.putExtra(Apg.EXTRA_TEXT, data);
+        intent.putExtra(Apg.EXTRA_SUBJECT, "Re: " + mSubject);
+        intent.putExtra(Apg.EXTRA_SEND_TO, mReplyTo);
+        intent.putExtra(Apg.EXTRA_SIGNATURE_KEY_ID, getSecretKeyId());
+        intent.putExtra(Apg.EXTRA_ENCRYPTION_KEY_IDS, new long[] { mSignatureKeyId });
+        startActivity(intent);
+    }
+
+    private void askForOutputFilename() {
+        showDialog(Id.dialog.output_filename);
+    }
+
+    @Override
+    public void passPhraseCallback(long keyId, String passPhrase) {
+        super.passPhraseCallback(keyId, passPhrase);
+        if (mDecryptTarget == Id.target.file) {
+            askForOutputFilename();
+        } else {
+            decryptStart();
+        }
+    }
+
+    private void decryptStart() {
+        showDialog(Id.dialog.decrypting);
+        startThread();
+    }
+
+    @Override
+    public void run() {
+        String error = null;
+        Security.addProvider(new BouncyCastleProvider());
+
+        Bundle data = new Bundle();
+        Message msg = new Message();
+        fillDataSource();
+        fillDataDestination();
+        try {
+            InputData in = mDataSource.getInputData(this, true);
+            OutputStream out = mDataDestination.getOutputStream(this);
+
+            if (mSignedOnly) {
+                data = Apg.verifyText(this, in, out, this);
+            } else {
+                data = Apg.decrypt(this, in, out, Apg.getCachedPassPhrase(getSecretKeyId()), this,
+                        mAssumeSymmetricEncryption);
+            }
+
+            out.close();
+
+            if (mDataDestination.getStreamFilename() != null) {
+                data.putString(Apg.EXTRA_RESULT_URI, "content://" + DataProvider.AUTHORITY
+                        + "/data/" + mDataDestination.getStreamFilename());
+            } else if (mDecryptTarget == Id.target.message) {
+                if (mReturnBinary) {
+                    data.putByteArray(Apg.EXTRA_DECRYPTED_DATA,
+                            ((ByteArrayOutputStream) out).toByteArray());
+                } else {
+                    data.putString(Apg.EXTRA_DECRYPTED_MESSAGE, new String(
+                            ((ByteArrayOutputStream) out).toByteArray()));
+                }
+            }
+        } catch (PGPException e) {
+            error = "" + e;
+        } catch (IOException e) {
+            error = "" + e;
+        } catch (SignatureException e) {
+            error = "" + e;
+        } catch (Apg.GeneralException e) {
+            error = "" + e;
+        }
+
+        data.putInt(Constants.extras.STATUS, Id.message.done);
+
+        if (error != null) {
+            data.putString(Apg.EXTRA_ERROR, error);
+        }
+
+        msg.setData(data);
+        sendMessage(msg);
+    }
+
+    @Override
+    public void handlerCallback(Message msg) {
+        Bundle data = msg.getData();
+        if (data == null) {
+            return;
+        }
+
+        if (data.getInt(Constants.extras.STATUS) == Id.message.unknown_signature_key) {
+            mUnknownSignatureKeyId = data.getLong(Constants.extras.KEY_ID);
+            showDialog(Id.dialog.lookup_unknown_key);
+            return;
+        }
+
+        super.handlerCallback(msg);
+    }
+
+    @Override
+    public void doneCallback(Message msg) {
+        super.doneCallback(msg);
+
+        Bundle data = msg.getData();
+        removeDialog(Id.dialog.decrypting);
+        mSignatureKeyId = 0;
+        mSignatureLayout.setVisibility(View.GONE);
+        mReplyEnabled = false;
+
+        // build new action bar
+        invalidateOptionsMenu();
+
+        String error = data.getString(Apg.EXTRA_ERROR);
+        if (error != null) {
+            Toast.makeText(this, getString(R.string.errorMessage, error), Toast.LENGTH_SHORT)
+                    .show();
+            return;
+        }
+
+        Toast.makeText(this, R.string.decryptionSuccessful, Toast.LENGTH_SHORT).show();
+        if (mReturnResult) {
+            Intent intent = new Intent();
+            intent.putExtras(data);
+            setResult(RESULT_OK, intent);
+            finish();
+            return;
+        }
+
+        switch (mDecryptTarget) {
+        case Id.target.message: {
+            String decryptedMessage = data.getString(Apg.EXTRA_DECRYPTED_MESSAGE);
+            mMessage.setText(decryptedMessage);
+            mMessage.setHorizontallyScrolling(false);
+            mReplyEnabled = false;
+
+            // build new action bar
+            invalidateOptionsMenu();
+            break;
+        }
+
+        case Id.target.file: {
+            if (mDeleteAfter.isChecked()) {
+                setDeleteFile(mInputFilename);
+                showDialog(Id.dialog.delete_file);
+            }
+            break;
+        }
+
+        default: {
+            // shouldn't happen
+            break;
+        }
+        }
+
+        if (data.getBoolean(Apg.EXTRA_SIGNATURE)) {
+            String userId = data.getString(Apg.EXTRA_SIGNATURE_USER_ID);
+            mSignatureKeyId = data.getLong(Apg.EXTRA_SIGNATURE_KEY_ID);
+            mUserIdRest.setText("id: " + Apg.getSmallFingerPrint(mSignatureKeyId));
+            if (userId == null) {
+                userId = getResources().getString(R.string.unknownUserId);
+            }
+            String chunks[] = userId.split(" <", 2);
+            userId = chunks[0];
+            if (chunks.length > 1) {
+                mUserIdRest.setText("<" + chunks[1]);
+            }
+            mUserId.setText(userId);
+
+            if (data.getBoolean(Apg.EXTRA_SIGNATURE_SUCCESS)) {
+                mSignatureStatusImage.setImageResource(R.drawable.overlay_ok);
+            } else if (data.getBoolean(Apg.EXTRA_SIGNATURE_UNKNOWN)) {
+                mSignatureStatusImage.setImageResource(R.drawable.overlay_error);
+                Toast.makeText(this, R.string.unknownSignatureKeyTouchToLookUp, Toast.LENGTH_LONG)
+                        .show();
+            } else {
+                mSignatureStatusImage.setImageResource(R.drawable.overlay_error);
+            }
+            mSignatureLayout.setVisibility(View.VISIBLE);
+        }
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+        case Id.request.filename: {
+            if (resultCode == RESULT_OK && data != null) {
+                String filename = data.getDataString();
+                if (filename != null) {
+                    // Get rid of URI prefix:
+                    if (filename.startsWith("file://")) {
+                        filename = filename.substring(7);
+                    }
+                    // replace %20 and so on
+                    filename = Uri.decode(filename);
+
+                    mFilename.setText(filename);
+                }
+            }
+            return;
+        }
+
+        case Id.request.output_filename: {
+            if (resultCode == RESULT_OK && data != null) {
+                String filename = data.getDataString();
+                if (filename != null) {
+                    // Get rid of URI prefix:
+                    if (filename.startsWith("file://")) {
+                        filename = filename.substring(7);
+                    }
+                    // replace %20 and so on
+                    filename = Uri.decode(filename);
+
+                    FileDialog.setFilename(filename);
+                }
+            }
+            return;
+        }
+
+        case Id.request.look_up_key_id: {
+            PausableThread thread = getRunningThread();
+            if (thread != null && thread.isPaused()) {
+                thread.unpause();
+            }
+            return;
+        }
+
+        default: {
+            break;
+        }
+        }
+
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        switch (id) {
+        case Id.dialog.output_filename: {
+            return FileDialog.build(this, getString(R.string.title_decryptToFile),
+                    getString(R.string.specifyFileToDecryptTo), mOutputFilename,
+                    new FileDialog.OnClickListener() {
+                        public void onOkClick(String filename, boolean checked) {
+                            removeDialog(Id.dialog.output_filename);
+                            mOutputFilename = filename;
+                            decryptStart();
+                        }
+
+                        public void onCancelClick() {
+                            removeDialog(Id.dialog.output_filename);
+                        }
+                    }, getString(R.string.filemanager_titleSave),
+                    getString(R.string.filemanager_btnSave), null, Id.request.output_filename);
+        }
+
+        case Id.dialog.lookup_unknown_key: {
+            AlertDialog.Builder alert = new AlertDialog.Builder(this);
+
+            alert.setIcon(android.R.drawable.ic_dialog_alert);
+            alert.setTitle(R.string.title_unknownSignatureKey);
+            alert.setMessage(getString(R.string.lookupUnknownKey,
+                    Apg.getSmallFingerPrint(mUnknownSignatureKeyId)));
+
+            alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int id) {
+                    removeDialog(Id.dialog.lookup_unknown_key);
+                    Intent intent = new Intent(DecryptActivity.this, KeyServerQueryActivity.class);
+                    intent.setAction(Apg.Intent.LOOK_UP_KEY_ID);
+                    intent.putExtra(Apg.EXTRA_KEY_ID, mUnknownSignatureKeyId);
+                    startActivityForResult(intent, Id.request.look_up_key_id);
+                }
+            });
+            alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int id) {
+                    removeDialog(Id.dialog.lookup_unknown_key);
+                    PausableThread thread = getRunningThread();
+                    if (thread != null && thread.isPaused()) {
+                        thread.unpause();
+                    }
+                }
+            });
+            alert.setCancelable(true);
+
+            return alert.create();
+        }
+
+        default: {
+            break;
+        }
+        }
+
+        return super.onCreateDialog(id);
+    }
+
+    protected void fillDataSource() {
+        mDataSource = new DataSource();
+        if (mContentUri != null) {
+            mDataSource.setUri(mContentUri);
+        } else if (mDecryptTarget == Id.target.file) {
+            mDataSource.setUri(mInputFilename);
+        } else {
+            if (mData != null) {
+                mDataSource.setData(mData);
+            } else {
+                mDataSource.setText(mMessage.getText().toString());
+            }
+        }
+    }
+
+    protected void fillDataDestination() {
+        mDataDestination = new DataDestination();
+        if (mContentUri != null) {
+            mDataDestination.setMode(Id.mode.stream);
+        } else if (mDecryptTarget == Id.target.file) {
+            mDataDestination.setFilename(mOutputFilename);
+            mDataDestination.setMode(Id.mode.file);
+        } else {
+            mDataDestination.setMode(Id.mode.byte_array);
+        }
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/EditKeyActivity.java

@@ -0,0 +1,412 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.spongycastle.openpgp.PGPException;
+import org.spongycastle.openpgp.PGPSecretKey;
+import org.spongycastle.openpgp.PGPSecretKeyRing;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.provider.Database;
+import org.thialfihar.android.apg.ui.widget.KeyEditor;
+import org.thialfihar.android.apg.ui.widget.SectionView;
+import org.thialfihar.android.apg.util.IterableIterator;
+import org.thialfihar.android.apg.R;
+
+import com.actionbarsherlock.app.ActionBar;
+import com.actionbarsherlock.view.Menu;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Message;
+import android.util.Log;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.Toast;
+import android.widget.CompoundButton.OnCheckedChangeListener;
+
+import java.io.IOException;
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidParameterException;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.SignatureException;
+import java.util.Vector;
+
+public class EditKeyActivity extends BaseActivity {
+    private Intent mIntent = null;
+    private ActionBar mActionBar;
+
+    private PGPSecretKeyRing mKeyRing = null;
+
+    private SectionView mUserIds;
+    private SectionView mKeys;
+
+    private String mCurrentPassPhrase = null;
+    private String mNewPassPhrase = null;
+
+    private Button mChangePassPhrase;
+
+    private CheckBox mNoPassphrase;
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        menu.add(1, Id.menu.option.cancel, 0, R.string.btn_doNotSave).setShowAsAction(
+                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        menu.add(1, Id.menu.option.save, 1, R.string.btn_save).setShowAsAction(
+                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case android.R.id.home:
+            startActivity(new Intent(this, SecretKeyListActivity.class));
+            return true;
+
+        case Id.menu.option.save:
+            saveClicked();
+            return true;
+
+        case Id.menu.option.cancel:
+            finish();
+            return true;
+
+        default:
+            break;
+
+        }
+        return false;
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.edit_key);
+
+        mActionBar = getSupportActionBar();
+
+        // find views
+        mChangePassPhrase = (Button) findViewById(R.id.edit_key_btn_change_pass_phrase);
+        mNoPassphrase = (CheckBox) findViewById(R.id.edit_key_no_passphrase);
+
+        Vector<String> userIds = new Vector<String>();
+        Vector<PGPSecretKey> keys = new Vector<PGPSecretKey>();
+        Vector<Integer> keysUsages = new Vector<Integer>();
+
+        // Catch Intents opened from other apps
+        mIntent = getIntent();
+        Bundle extras = mIntent.getExtras();
+        if (Apg.Intent.CREATE_KEY.equals(mIntent.getAction())) {
+
+            mActionBar.setTitle(R.string.title_createKey);
+
+            mCurrentPassPhrase = "";
+
+            if (extras != null) {
+
+                // disable home button on actionbar because this activity is run from another app
+                mActionBar.setDisplayShowTitleEnabled(true);
+                mActionBar.setDisplayHomeAsUpEnabled(false);
+                mActionBar.setHomeButtonEnabled(false);
+
+                // if userId is given, prefill the fields
+                if (extras.containsKey(Apg.EXTRA_USER_IDS)) {
+                    Log.d(Constants.TAG, "UserIds are given!");
+                    userIds.add(extras.getString(Apg.EXTRA_USER_IDS));
+                }
+
+                // if no passphrase is given
+                if (extras.containsKey(Apg.EXTRA_NO_PASSPHRASE)) {
+                    boolean noPassphrase = extras.getBoolean(Apg.EXTRA_NO_PASSPHRASE);
+                    if (noPassphrase) {
+                        // check "no passphrase" checkbox and remove button
+                        mNoPassphrase.setChecked(true);
+                        mChangePassPhrase.setVisibility(View.GONE);
+                    }
+                }
+
+                // generate key
+                if (extras.containsKey(Apg.EXTRA_GENERATE_DEFAULT_KEYS)) {
+                    boolean generateDefaultKeys = extras
+                            .getBoolean(Apg.EXTRA_GENERATE_DEFAULT_KEYS);
+                    if (generateDefaultKeys) {
+
+                        // generate a RSA 2048 key for encryption and signing!
+                        try {
+                            PGPSecretKey masterKey = Apg.createKey(this, Id.choice.algorithm.rsa,
+                                    2048, mCurrentPassPhrase, null);
+
+                            // add new masterKey to keys array, which is then added to view
+                            keys.add(masterKey);
+                            keysUsages.add(Id.choice.usage.sign_only);
+
+                            PGPSecretKey subKey = Apg.createKey(this, Id.choice.algorithm.rsa,
+                                    2048, mCurrentPassPhrase, masterKey);
+
+                            keys.add(subKey);
+                            keysUsages.add(Id.choice.usage.encrypt_only);
+                        } catch (Exception e) {
+                            Log.e(Constants.TAG, "Creating initial key failed: +" + e);
+                        }
+                    }
+
+                }
+            }
+        } else if (Apg.Intent.EDIT_KEY.equals(mIntent.getAction())) {
+
+            mActionBar.setTitle(R.string.title_editKey);
+
+            mCurrentPassPhrase = Apg.getEditPassPhrase();
+            if (mCurrentPassPhrase == null) {
+                mCurrentPassPhrase = "";
+            }
+
+            if (mCurrentPassPhrase.equals("")) {
+                // check "no passphrase" checkbox and remove button
+                mNoPassphrase.setChecked(true);
+                mChangePassPhrase.setVisibility(View.GONE);
+            }
+
+            if (extras != null) {
+
+                if (extras.containsKey(Apg.EXTRA_KEY_ID)) {
+                    long keyId = mIntent.getExtras().getLong(Apg.EXTRA_KEY_ID);
+
+                    if (keyId != 0) {
+                        PGPSecretKey masterKey = null;
+                        mKeyRing = Apg.getSecretKeyRing(keyId);
+                        if (mKeyRing != null) {
+                            masterKey = Apg.getMasterKey(mKeyRing);
+                            for (PGPSecretKey key : new IterableIterator<PGPSecretKey>(
+                                    mKeyRing.getSecretKeys())) {
+                                keys.add(key);
+                                keysUsages.add(-1); // get usage when view is created
+                            }
+                        }
+                        if (masterKey != null) {
+                            for (String userId : new IterableIterator<String>(
+                                    masterKey.getUserIDs())) {
+                                userIds.add(userId);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+
+        mChangePassPhrase.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                showDialog(Id.dialog.new_pass_phrase);
+            }
+        });
+
+        // disable passphrase when no passphrase checkobox is checked!
+        mNoPassphrase.setOnCheckedChangeListener(new OnCheckedChangeListener() {
+
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+                if (isChecked) {
+                    // remove passphrase
+                    mNewPassPhrase = null;
+
+                    mChangePassPhrase.setVisibility(View.GONE);
+                } else {
+                    mChangePassPhrase.setVisibility(View.VISIBLE);
+                }
+
+            }
+        });
+
+        // Build layout based on given userIds and keys
+        LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+
+        LinearLayout container = (LinearLayout) findViewById(R.id.edit_key_container);
+        mUserIds = (SectionView) inflater.inflate(R.layout.edit_key_section, container, false);
+        mUserIds.setType(Id.type.user_id);
+        mUserIds.setUserIds(userIds);
+        container.addView(mUserIds);
+        mKeys = (SectionView) inflater.inflate(R.layout.edit_key_section, container, false);
+        mKeys.setType(Id.type.key);
+        mKeys.setKeys(keys, keysUsages);
+        container.addView(mKeys);
+
+        updatePassPhraseButtonText();
+    }
+
+    private long getMasterKeyId() {
+        if (mKeys.getEditors().getChildCount() == 0) {
+            return 0;
+        }
+        return ((KeyEditor) mKeys.getEditors().getChildAt(0)).getValue().getKeyID();
+    }
+
+    public boolean isPassphraseSet() {
+        if (mNoPassphrase.isChecked()) {
+            return true;
+        } else if ((!mCurrentPassPhrase.equals(""))
+                || (mNewPassPhrase != null && !mNewPassPhrase.equals(""))) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        switch (id) {
+        case Id.dialog.new_pass_phrase: {
+            AlertDialog.Builder alert = new AlertDialog.Builder(this);
+
+            if (isPassphraseSet()) {
+                alert.setTitle(R.string.title_changePassPhrase);
+            } else {
+                alert.setTitle(R.string.title_setPassPhrase);
+            }
+            alert.setMessage(R.string.enterPassPhraseTwice);
+
+            LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+            View view = inflater.inflate(R.layout.passphrase, null);
+            final EditText input1 = (EditText) view.findViewById(R.id.passphrase_passphrase);
+            final EditText input2 = (EditText) view.findViewById(R.id.passphrase_passphrase_again);
+
+            alert.setView(view);
+
+            alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int id) {
+                    removeDialog(Id.dialog.new_pass_phrase);
+
+                    String passPhrase1 = "" + input1.getText();
+                    String passPhrase2 = "" + input2.getText();
+                    if (!passPhrase1.equals(passPhrase2)) {
+                        showDialog(Id.dialog.pass_phrases_do_not_match);
+                        return;
+                    }
+
+                    if (passPhrase1.equals("")) {
+                        showDialog(Id.dialog.no_pass_phrase);
+                        return;
+                    }
+
+                    mNewPassPhrase = passPhrase1;
+                    updatePassPhraseButtonText();
+                }
+            });
+
+            alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int id) {
+                    removeDialog(Id.dialog.new_pass_phrase);
+                }
+            });
+
+            return alert.create();
+        }
+
+        default: {
+            return super.onCreateDialog(id);
+        }
+        }
+    }
+
+    private void saveClicked() {
+        if (!isPassphraseSet()) {
+            Toast.makeText(this, R.string.setAPassPhrase, Toast.LENGTH_SHORT).show();
+            return;
+        }
+        showDialog(Id.dialog.saving);
+        startThread();
+    }
+
+    @Override
+    public void run() {
+        String error = null;
+        Bundle data = new Bundle();
+        Message msg = new Message();
+
+        try {
+            String oldPassPhrase = mCurrentPassPhrase;
+            String newPassPhrase = mNewPassPhrase;
+            if (newPassPhrase == null) {
+                newPassPhrase = oldPassPhrase;
+            }
+            Apg.buildSecretKey(this, mUserIds, mKeys, oldPassPhrase, newPassPhrase, this);
+            Apg.setCachedPassPhrase(getMasterKeyId(), newPassPhrase);
+        } catch (NoSuchProviderException e) {
+            error = "" + e;
+        } catch (NoSuchAlgorithmException e) {
+            error = "" + e;
+        } catch (PGPException e) {
+            error = "" + e;
+        } catch (SignatureException e) {
+            error = "" + e;
+        } catch (Apg.GeneralException e) {
+            error = "" + e;
+        } catch (Database.GeneralException e) {
+            error = "" + e;
+        } catch (IOException e) {
+            error = "" + e;
+        }
+
+        data.putInt(Constants.extras.STATUS, Id.message.done);
+
+        if (error != null) {
+            data.putString(Apg.EXTRA_ERROR, error);
+        }
+
+        msg.setData(data);
+        sendMessage(msg);
+    }
+
+    @Override
+    public void doneCallback(Message msg) {
+        super.doneCallback(msg);
+
+        Bundle data = msg.getData();
+        removeDialog(Id.dialog.saving);
+
+        String error = data.getString(Apg.EXTRA_ERROR);
+        if (error != null) {
+            Toast.makeText(EditKeyActivity.this, getString(R.string.errorMessage, error),
+                    Toast.LENGTH_SHORT).show();
+        } else {
+            Toast.makeText(EditKeyActivity.this, R.string.keySaved, Toast.LENGTH_SHORT).show();
+            setResult(RESULT_OK);
+            finish();
+        }
+    }
+
+    private void updatePassPhraseButtonText() {
+        mChangePassPhrase.setText(isPassphraseSet() ? R.string.btn_changePassPhrase
+                : R.string.btn_setPassPhrase);
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/GeneralActivity.java

@@ -0,0 +1,191 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import java.io.ByteArrayInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Vector;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.util.Choice;
+
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.ListView;
+import android.widget.Toast;
+
+public class GeneralActivity extends BaseActivity {
+    private Intent mIntent;
+    private ArrayAdapter<Choice> mAdapter;
+    private ListView mList;
+    private Button mCancelButton;
+    private String mDataString;
+    private Uri mDataUri;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.general);
+
+        mIntent = getIntent();
+
+        InputStream inStream = null;
+        {
+            String data = mIntent.getStringExtra(Intent.EXTRA_TEXT);
+            if (data != null) {
+                mDataString = data;
+                inStream = new ByteArrayInputStream(data.getBytes());
+            }
+        }
+
+        if (inStream == null) {
+            Uri data = mIntent.getData();
+            if (data != null) {
+                mDataUri = data;
+                try {
+                    inStream = getContentResolver().openInputStream(data);
+                } catch (FileNotFoundException e) {
+                    // didn't work
+                    Toast.makeText(this, "failed to open stream", Toast.LENGTH_SHORT).show();
+                }
+            }
+        }
+
+        if (inStream == null) {
+            Toast.makeText(this, "no data found", Toast.LENGTH_SHORT).show();
+            finish();
+            return;
+        }
+
+        int contentType = Id.content.unknown;
+        try {
+            contentType = Apg.getStreamContent(this, inStream);
+            inStream.close();
+        } catch (IOException e) {
+            // just means that there's no PGP data in there
+        }
+
+        mList = (ListView) findViewById(R.id.options);
+        Vector<Choice> choices = new Vector<Choice>();
+
+        if (contentType == Id.content.keys) {
+            choices.add(new Choice(Id.choice.action.import_public,
+                                   getString(R.string.action_importPublic)));
+            choices.add(new Choice(Id.choice.action.import_secret,
+                                   getString(R.string.action_importSecret)));
+        }
+
+        if (contentType == Id.content.encrypted_data) {
+            choices.add(new Choice(Id.choice.action.decrypt, getString(R.string.action_decrypt)));
+        }
+
+        if (contentType == Id.content.unknown) {
+            choices.add(new Choice(Id.choice.action.encrypt, getString(R.string.action_encrypt)));
+        }
+
+        mAdapter = new ArrayAdapter<Choice>(this, android.R.layout.simple_list_item_1, choices);
+        mList.setAdapter(mAdapter);
+
+        mList.setOnItemClickListener(new OnItemClickListener() {
+            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) {
+                clicked(mAdapter.getItem(arg2).getId());
+            }
+        });
+
+        mCancelButton = (Button) findViewById(R.id.btn_cancel);
+        mCancelButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                GeneralActivity.this.finish();
+            }
+        });
+
+        if (choices.size() == 1) {
+            clicked(choices.get(0).getId());
+        }
+    }
+
+    private void clicked(int id) {
+        Intent intent = new Intent();
+        switch (id) {
+            case Id.choice.action.encrypt: {
+                intent.setClass(this, EncryptActivity.class);
+                if (mDataString != null) {
+                    intent.setAction(Apg.Intent.ENCRYPT);
+                    intent.putExtra(Apg.EXTRA_TEXT, mDataString);
+                } else if (mDataUri != null) {
+                    intent.setAction(Apg.Intent.ENCRYPT_FILE);
+                    intent.setDataAndType(mDataUri, mIntent.getType());
+                }
+
+                break;
+            }
+
+            case Id.choice.action.decrypt: {
+                intent.setClass(this, DecryptActivity.class);
+                if (mDataString != null) {
+                    intent.setAction(Apg.Intent.DECRYPT);
+                    intent.putExtra(Apg.EXTRA_TEXT, mDataString);
+                } else if (mDataUri != null) {
+                    intent.setAction(Apg.Intent.DECRYPT_FILE);
+                    intent.setDataAndType(mDataUri, mIntent.getType());
+                }
+
+                break;
+            }
+
+            case Id.choice.action.import_public: {
+                intent.setClass(this, PublicKeyListActivity.class);
+                intent.setAction(Apg.Intent.IMPORT);
+                if (mDataString != null) {
+                    intent.putExtra(Apg.EXTRA_TEXT, mDataString);
+                } else if (mDataUri != null) {
+                    intent.setDataAndType(mDataUri, mIntent.getType());
+                }
+                break;
+            }
+
+            case Id.choice.action.import_secret: {
+                intent.setClass(this, SecretKeyListActivity.class);
+                intent.setAction(Apg.Intent.IMPORT);
+                if (mDataString != null) {
+                    intent.putExtra(Apg.EXTRA_TEXT, mDataString);
+                } else if (mDataUri != null) {
+                    intent.setDataAndType(mDataUri, mIntent.getType());
+                }
+                break;
+            }
+
+            default: {
+                // shouldn't happen
+                return;
+            }
+        }
+
+        startActivity(intent);
+        finish();
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/HelpActivity.java

@@ -0,0 +1,79 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.util.Utils;
+
+import com.actionbarsherlock.app.ActionBar;
+import com.actionbarsherlock.app.SherlockActivity;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.text.Html;
+import android.text.method.LinkMovementMethod;
+import android.widget.TextView;
+
+public class HelpActivity extends SherlockActivity {
+    Activity mActivity;
+    TextView mHelpText;
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case android.R.id.home:
+            startActivity(new Intent(this, MainActivity.class));
+            return true;
+
+        default:
+            break;
+
+        }
+        return false;
+    }
+
+    /**
+     * Instantiate View for this Activity
+     */
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.help_activity);
+
+        final ActionBar actionBar = getSupportActionBar();
+        actionBar.setDisplayShowTitleEnabled(true);
+        actionBar.setDisplayHomeAsUpEnabled(true);
+
+        mActivity = this;
+
+        mHelpText = (TextView) findViewById(R.id.help_text);
+
+        // load html from html file from /res/raw
+        String helpText = Utils.readContentFromResource(mActivity, R.raw.help);
+
+        // set text from resources with html markup
+        mHelpText.setText(Html.fromHtml(helpText));
+        // make links work
+        mHelpText.setMovementMethod(LinkMovementMethod.getInstance());
+
+    }
+
+}

org_apg/src/org/thialfihar/android/apg/ui/ImportFromQRCodeActivity.java

@@ -0,0 +1,152 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import java.io.ByteArrayInputStream;
+import java.io.IOException;
+
+import org.spongycastle.openpgp.PGPKeyRing;
+import org.spongycastle.openpgp.PGPPublicKeyRing;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.HkpKeyServer;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.KeyServer.QueryException;
+import org.thialfihar.android.apg.R;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Message;
+import android.util.Log;
+import android.widget.Toast;
+
+import com.google.zxing.integration.android.IntentIntegrator;
+import com.google.zxing.integration.android.IntentResult;
+
+public class ImportFromQRCodeActivity extends BaseActivity {
+    private static final String TAG = "ImportFromQRCodeActivity";
+
+    private final Bundle status = new Bundle();
+    private final Message msg = new Message();
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        new IntentIntegrator(this).initiateScan();
+    }
+
+    private void importAndSign(final long keyId, final String expectedFingerprint) {
+        if (expectedFingerprint != null && expectedFingerprint.length() > 0) {
+            
+            Thread t = new Thread() {
+                @Override
+                public void run() {
+                    try {
+                        // TODO: display some sort of spinner here while the user waits
+                        
+                        HkpKeyServer server = new HkpKeyServer(mPreferences.getKeyServers()[0]); // TODO: there should be only 1
+                        String encodedKey = server.get(keyId);
+
+                        PGPKeyRing keyring = Apg.decodeKeyRing(new ByteArrayInputStream(encodedKey.getBytes()));
+                        if (keyring != null && keyring instanceof PGPPublicKeyRing) {
+                            PGPPublicKeyRing publicKeyRing = (PGPPublicKeyRing) keyring;
+
+                            // make sure the fingerprints match before we cache this thing
+                            String actualFingerprint = Apg.convertToHex(publicKeyRing.getPublicKey().getFingerprint());
+                            if (expectedFingerprint.equals(actualFingerprint)) {
+                                // store the signed key in our local cache
+                                int retval = Apg.storeKeyRingInCache(publicKeyRing);
+                                if (retval != Id.return_value.ok && retval != Id.return_value.updated) {
+                                    status.putString(Apg.EXTRA_ERROR, "Failed to store signed key in local cache");
+                                } else {
+                                    Intent intent = new Intent(ImportFromQRCodeActivity.this, SignKeyActivity.class);
+                                    intent.putExtra(Apg.EXTRA_KEY_ID, keyId);
+                                    startActivityForResult(intent, Id.request.sign_key);
+                                }
+                            } else {
+                                status.putString(Apg.EXTRA_ERROR, "Scanned fingerprint does NOT match the fingerprint of the received key.  You shouldnt trust this key.");
+                            }
+                        }
+                    } catch (QueryException e) {
+                        Log.e(TAG, "Failed to query KeyServer", e);
+                        status.putString(Apg.EXTRA_ERROR, "Failed to query KeyServer");
+                        status.putInt(Constants.extras.STATUS, Id.message.done);
+                    } catch (IOException e) {
+                        Log.e(TAG, "Failed to query KeyServer", e);
+                        status.putString(Apg.EXTRA_ERROR, "Failed to query KeyServer");
+                        status.putInt(Constants.extras.STATUS, Id.message.done);
+                    }
+                }
+            };
+
+            t.setName("KeyExchange Download Thread");
+            t.setDaemon(true);
+            t.start();
+        }
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+            case IntentIntegrator.REQUEST_CODE: {
+                boolean debug = true; // TODO: remove this!!!
+                IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, data);
+                if (debug || (scanResult != null && scanResult.getFormatName() != null)) {
+                    String[] bits = debug ? new String[] { "5993515643896327656", "0816 F68A 6816 68FB 01BF  2CA5 532D 3EB9 1E2F EDE8" } : scanResult.getContents().split(",");
+                    if (bits.length != 2) {
+                        return; // dont know how to handle this.  Not a valid code
+                    }
+
+                    long keyId = Long.parseLong(bits[0]);
+                    String expectedFingerprint = bits[1];
+                    
+                    importAndSign(keyId, expectedFingerprint);
+                    
+                    break;
+                }
+            }
+            
+            case Id.request.sign_key: {
+                // signals the end of processing.  Signature was either applied, or it wasnt
+                status.putInt(Constants.extras.STATUS, Id.message.done);
+                
+                msg.setData(status);
+                sendMessage(msg);
+                
+                break;
+            }
+
+            default: {
+                super.onActivityResult(requestCode, resultCode, data);
+            }
+        }
+    }
+    
+    @Override
+    public void doneCallback(Message msg) {
+        super.doneCallback(msg);
+        
+        Bundle data = msg.getData();
+        String error = data.getString(Apg.EXTRA_ERROR);
+        if (error != null) {
+            Toast.makeText(this, getString(R.string.errorMessage, error), Toast.LENGTH_SHORT).show();
+            return;
+        }
+
+        Toast.makeText(this, R.string.keySignSuccess, Toast.LENGTH_SHORT).show(); // TODO
+        finish();
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/KeyListActivity.java

@@ -0,0 +1,769 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.spongycastle.openpgp.PGPException;
+import org.spongycastle.openpgp.PGPPublicKeyRing;
+import org.spongycastle.openpgp.PGPSecretKeyRing;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.FileDialog;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.InputData;
+import org.thialfihar.android.apg.provider.KeyRings;
+import org.thialfihar.android.apg.provider.Keys;
+import org.thialfihar.android.apg.provider.UserIds;
+import org.thialfihar.android.apg.R;
+
+import com.actionbarsherlock.view.MenuItem;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.SearchManager;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteQueryBuilder;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Message;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.BaseExpandableListAdapter;
+import android.widget.Button;
+import android.widget.ExpandableListView;
+import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
+import android.widget.ImageView;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import java.io.ByteArrayInputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.util.Vector;
+
+public class KeyListActivity extends BaseActivity {
+    protected ExpandableListView mList;
+    protected KeyListAdapter mListAdapter;
+    protected View mFilterLayout;
+    protected Button mClearFilterButton;
+    protected TextView mFilterInfo;
+
+    protected int mSelectedItem = -1;
+    protected int mTask = 0;
+
+    protected String mImportFilename = Constants.path.APP_DIR + "/";
+    protected String mExportFilename = Constants.path.APP_DIR + "/";
+
+    protected String mImportData;
+    protected boolean mDeleteAfterImport = false;
+
+    protected int mKeyType = Id.type.public_key;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.key_list);
+
+        setDefaultKeyMode(DEFAULT_KEYS_SEARCH_LOCAL);
+
+        mList = (ExpandableListView) findViewById(R.id.list);
+        registerForContextMenu(mList);
+
+        mFilterLayout = findViewById(R.id.layout_filter);
+        mFilterInfo = (TextView) mFilterLayout.findViewById(R.id.filterInfo);
+        mClearFilterButton = (Button) mFilterLayout.findViewById(R.id.btn_clear);
+
+        mClearFilterButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                handleIntent(new Intent());
+            }
+        });
+
+        handleIntent(getIntent());
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        handleIntent(intent);
+    }
+
+    protected void handleIntent(Intent intent) {
+        String searchString = null;
+        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
+            searchString = intent.getStringExtra(SearchManager.QUERY);
+            if (searchString != null && searchString.trim().length() == 0) {
+                searchString = null;
+            }
+        }
+
+        if (searchString == null) {
+            mFilterLayout.setVisibility(View.GONE);
+        } else {
+            mFilterLayout.setVisibility(View.VISIBLE);
+            mFilterInfo.setText(getString(R.string.filterInfo, searchString));
+        }
+
+        if (mListAdapter != null) {
+            mListAdapter.cleanup();
+        }
+        mListAdapter = new KeyListAdapter(this, searchString);
+        mList.setAdapter(mListAdapter);
+
+        if (Apg.Intent.IMPORT.equals(intent.getAction())) {
+            if ("file".equals(intent.getScheme()) && intent.getDataString() != null) {
+                mImportFilename = Uri.decode(intent.getDataString().replace("file://", ""));
+            } else {
+                mImportData = intent.getStringExtra(Apg.EXTRA_TEXT);
+            }
+            importKeys();
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+        case Id.menu.option.import_keys: {
+            showDialog(Id.dialog.import_keys);
+            return true;
+        }
+
+        case Id.menu.option.export_keys: {
+            showDialog(Id.dialog.export_keys);
+            return true;
+        }
+
+        default: {
+            return super.onOptionsItemSelected(item);
+        }
+        }
+    }
+
+    @Override
+    public boolean onContextItemSelected(android.view.MenuItem menuItem) {
+        ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) menuItem.getMenuInfo();
+        int type = ExpandableListView.getPackedPositionType(info.packedPosition);
+        int groupPosition = ExpandableListView.getPackedPositionGroup(info.packedPosition);
+
+        if (type != ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
+            return super.onContextItemSelected(menuItem);
+        }
+
+        switch (menuItem.getItemId()) {
+        case Id.menu.export: {
+            mSelectedItem = groupPosition;
+            showDialog(Id.dialog.export_key);
+            return true;
+        }
+
+        case Id.menu.delete: {
+            mSelectedItem = groupPosition;
+            showDialog(Id.dialog.delete_key);
+            return true;
+        }
+
+        default: {
+            return super.onContextItemSelected(menuItem);
+        }
+        }
+    }
+
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        boolean singleKeyExport = false;
+
+        switch (id) {
+        case Id.dialog.delete_key: {
+            final int keyRingId = mListAdapter.getKeyRingId(mSelectedItem);
+            mSelectedItem = -1;
+            // TODO: better way to do this?
+            String userId = "<unknown>";
+            Object keyRing = Apg.getKeyRing(keyRingId);
+            if (keyRing != null) {
+                if (keyRing instanceof PGPPublicKeyRing) {
+                    userId = Apg.getMainUserIdSafe(this,
+                            Apg.getMasterKey((PGPPublicKeyRing) keyRing));
+                } else {
+                    userId = Apg.getMainUserIdSafe(this,
+                            Apg.getMasterKey((PGPSecretKeyRing) keyRing));
+                }
+            }
+
+            AlertDialog.Builder builder = new AlertDialog.Builder(this);
+            builder.setTitle(R.string.warning);
+            builder.setMessage(getString(
+                    mKeyType == Id.type.public_key ? R.string.keyDeletionConfirmation
+                            : R.string.secretKeyDeletionConfirmation, userId));
+            builder.setIcon(android.R.drawable.ic_dialog_alert);
+            builder.setPositiveButton(R.string.btn_delete, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface dialog, int id) {
+                    deleteKey(keyRingId);
+                    removeDialog(Id.dialog.delete_key);
+                }
+            });
+            builder.setNegativeButton(android.R.string.cancel,
+                    new DialogInterface.OnClickListener() {
+                        public void onClick(DialogInterface dialog, int id) {
+                            removeDialog(Id.dialog.delete_key);
+                        }
+                    });
+            return builder.create();
+        }
+
+        case Id.dialog.import_keys: {
+            return FileDialog.build(this, getString(R.string.title_importKeys),
+                    getString(R.string.specifyFileToImportFrom), mImportFilename,
+                    new FileDialog.OnClickListener() {
+                        public void onOkClick(String filename, boolean checked) {
+                            removeDialog(Id.dialog.import_keys);
+                            mDeleteAfterImport = checked;
+                            mImportFilename = filename;
+                            importKeys();
+                        }
+
+                        public void onCancelClick() {
+                            removeDialog(Id.dialog.import_keys);
+                        }
+                    }, getString(R.string.filemanager_titleOpen),
+                    getString(R.string.filemanager_btnOpen),
+                    getString(R.string.label_deleteAfterImport), Id.request.filename);
+        }
+
+        case Id.dialog.export_key: {
+            singleKeyExport = true;
+            // break intentionally omitted, to use the Id.dialog.export_keys dialog
+        }
+
+        case Id.dialog.export_keys: {
+            String title = (singleKeyExport ? getString(R.string.title_exportKey)
+                    : getString(R.string.title_exportKeys));
+
+            final int thisDialogId = (singleKeyExport ? Id.dialog.export_key
+                    : Id.dialog.export_keys);
+
+            return FileDialog.build(this, title,
+                    getString(mKeyType == Id.type.public_key ? R.string.specifyFileToExportTo
+                            : R.string.specifyFileToExportSecretKeysTo), mExportFilename,
+                    new FileDialog.OnClickListener() {
+                        public void onOkClick(String filename, boolean checked) {
+                            removeDialog(thisDialogId);
+                            mExportFilename = filename;
+                            exportKeys();
+                        }
+
+                        public void onCancelClick() {
+                            removeDialog(thisDialogId);
+                        }
+                    }, getString(R.string.filemanager_titleSave),
+                    getString(R.string.filemanager_btnSave), null, Id.request.filename);
+        }
+
+        default: {
+            return super.onCreateDialog(id);
+        }
+        }
+    }
+
+    public void importKeys() {
+        showDialog(Id.dialog.importing);
+        mTask = Id.task.import_keys;
+        startThread();
+    }
+
+    public void exportKeys() {
+        showDialog(Id.dialog.exporting);
+        mTask = Id.task.export_keys;
+        startThread();
+    }
+
+    @Override
+    public void run() {
+        String error = null;
+        Bundle data = new Bundle();
+        Message msg = new Message();
+
+        try {
+            InputStream importInputStream = null;
+            OutputStream exportOutputStream = null;
+            long size = 0;
+            if (mTask == Id.task.import_keys) {
+                if (mImportData != null) {
+                    byte[] bytes = mImportData.getBytes();
+                    size = bytes.length;
+                    importInputStream = new ByteArrayInputStream(bytes);
+                } else {
+                    File file = new File(mImportFilename);
+                    size = file.length();
+                    importInputStream = new FileInputStream(file);
+                }
+            } else {
+                exportOutputStream = new FileOutputStream(mExportFilename);
+            }
+
+            if (mTask == Id.task.import_keys) {
+                data = Apg.importKeyRings(this, mKeyType, new InputData(importInputStream, size),
+                        this);
+            } else {
+                Vector<Integer> keyRingIds = new Vector<Integer>();
+                if (mSelectedItem == -1) {
+                    keyRingIds = Apg
+                            .getKeyRingIds(mKeyType == Id.type.public_key ? Id.database.type_public
+                                    : Id.database.type_secret);
+                } else {
+                    int keyRingId = mListAdapter.getKeyRingId(mSelectedItem);
+                    keyRingIds.add(keyRingId);
+                    mSelectedItem = -1;
+                }
+                data = Apg.exportKeyRings(this, keyRingIds, exportOutputStream, this);
+            }
+        } catch (FileNotFoundException e) {
+            error = getString(R.string.error_fileNotFound);
+        } catch (IOException e) {
+            error = "" + e;
+        } catch (PGPException e) {
+            error = "" + e;
+        } catch (Apg.GeneralException e) {
+            error = "" + e;
+        }
+
+        mImportData = null;
+
+        if (mTask == Id.task.import_keys) {
+            data.putInt(Constants.extras.STATUS, Id.message.import_done);
+        } else {
+            data.putInt(Constants.extras.STATUS, Id.message.export_done);
+        }
+
+        if (error != null) {
+            data.putString(Apg.EXTRA_ERROR, error);
+        }
+
+        msg.setData(data);
+        sendMessage(msg);
+    }
+
+    protected void deleteKey(int keyRingId) {
+        Apg.deleteKey(keyRingId);
+        refreshList();
+    }
+
+    protected void refreshList() {
+        mListAdapter.rebuild(true);
+        mListAdapter.notifyDataSetChanged();
+    }
+
+    @Override
+    public void doneCallback(Message msg) {
+        super.doneCallback(msg);
+
+        Bundle data = msg.getData();
+        if (data != null) {
+            int type = data.getInt(Constants.extras.STATUS);
+            switch (type) {
+            case Id.message.import_done: {
+                removeDialog(Id.dialog.importing);
+
+                String error = data.getString(Apg.EXTRA_ERROR);
+                if (error != null) {
+                    Toast.makeText(KeyListActivity.this, getString(R.string.errorMessage, error),
+                            Toast.LENGTH_SHORT).show();
+                } else {
+                    int added = data.getInt("added");
+                    int updated = data.getInt("updated");
+                    int bad = data.getInt("bad");
+                    String message;
+                    if (added > 0 && updated > 0) {
+                        message = getString(R.string.keysAddedAndUpdated, added, updated);
+                    } else if (added > 0) {
+                        message = getString(R.string.keysAdded, added);
+                    } else if (updated > 0) {
+                        message = getString(R.string.keysUpdated, updated);
+                    } else {
+                        message = getString(R.string.noKeysAddedOrUpdated);
+                    }
+                    Toast.makeText(KeyListActivity.this, message, Toast.LENGTH_SHORT).show();
+                    if (bad > 0) {
+                        AlertDialog.Builder alert = new AlertDialog.Builder(this);
+
+                        alert.setIcon(android.R.drawable.ic_dialog_alert);
+                        alert.setTitle(R.string.warning);
+                        alert.setMessage(this.getString(R.string.badKeysEncountered, bad));
+
+                        alert.setPositiveButton(android.R.string.ok,
+                                new DialogInterface.OnClickListener() {
+                                    public void onClick(DialogInterface dialog, int id) {
+                                        dialog.cancel();
+                                    }
+                                });
+                        alert.setCancelable(true);
+                        alert.create().show();
+                    } else if (mDeleteAfterImport) {
+                        // everything went well, so now delete, if that was turned on
+                        setDeleteFile(mImportFilename);
+                        showDialog(Id.dialog.delete_file);
+                    }
+                }
+                refreshList();
+                break;
+            }
+
+            case Id.message.export_done: {
+                removeDialog(Id.dialog.exporting);
+
+                String error = data.getString(Apg.EXTRA_ERROR);
+                if (error != null) {
+                    Toast.makeText(KeyListActivity.this, getString(R.string.errorMessage, error),
+                            Toast.LENGTH_SHORT).show();
+                } else {
+                    int exported = data.getInt("exported");
+                    String message;
+                    if (exported == 1) {
+                        message = getString(R.string.keyExported);
+                    } else if (exported > 0) {
+                        message = getString(R.string.keysExported, exported);
+                    } else {
+                        message = getString(R.string.noKeysExported);
+                    }
+                    Toast.makeText(KeyListActivity.this, message, Toast.LENGTH_SHORT).show();
+                }
+                break;
+            }
+
+            default: {
+                break;
+            }
+            }
+        }
+    }
+
+    protected class KeyListAdapter extends BaseExpandableListAdapter {
+        private LayoutInflater mInflater;
+        private Vector<Vector<KeyChild>> mChildren;
+        private SQLiteDatabase mDatabase;
+        private Cursor mCursor;
+        private String mSearchString;
+
+        private class KeyChild {
+            public static final int KEY = 0;
+            public static final int USER_ID = 1;
+            public static final int FINGER_PRINT = 2;
+
+            public int type;
+            public String userId;
+            public long keyId;
+            public boolean isMasterKey;
+            public int algorithm;
+            public int keySize;
+            public boolean canSign;
+            public boolean canEncrypt;
+            public String fingerPrint;
+
+            public KeyChild(long keyId, boolean isMasterKey, int algorithm, int keySize,
+                    boolean canSign, boolean canEncrypt) {
+                this.type = KEY;
+                this.keyId = keyId;
+                this.isMasterKey = isMasterKey;
+                this.algorithm = algorithm;
+                this.keySize = keySize;
+                this.canSign = canSign;
+                this.canEncrypt = canEncrypt;
+            }
+
+            public KeyChild(String userId) {
+                type = USER_ID;
+                this.userId = userId;
+            }
+
+            public KeyChild(String fingerPrint, boolean isFingerPrint) {
+                type = FINGER_PRINT;
+                this.fingerPrint = fingerPrint;
+            }
+        }
+
+        public KeyListAdapter(Context context, String searchString) {
+            mSearchString = searchString;
+
+            mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+            mDatabase = Apg.getDatabase().db();
+            SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
+            qb.setTables(KeyRings.TABLE_NAME + " INNER JOIN " + Keys.TABLE_NAME + " ON " + "("
+                    + KeyRings.TABLE_NAME + "." + KeyRings._ID + " = " + Keys.TABLE_NAME + "."
+                    + Keys.KEY_RING_ID + " AND " + Keys.TABLE_NAME + "." + Keys.IS_MASTER_KEY
+                    + " = '1'" + ") " + " INNER JOIN " + UserIds.TABLE_NAME + " ON " + "("
+                    + Keys.TABLE_NAME + "." + Keys._ID + " = " + UserIds.TABLE_NAME + "."
+                    + UserIds.KEY_ID + " AND " + UserIds.TABLE_NAME + "." + UserIds.RANK
+                    + " = '0')");
+
+            if (searchString != null && searchString.trim().length() > 0) {
+                String[] chunks = searchString.trim().split(" +");
+                qb.appendWhere("EXISTS (SELECT tmp." + UserIds._ID + " FROM " + UserIds.TABLE_NAME
+                        + " AS tmp WHERE " + "tmp." + UserIds.KEY_ID + " = " + Keys.TABLE_NAME
+                        + "." + Keys._ID);
+                for (int i = 0; i < chunks.length; ++i) {
+                    qb.appendWhere(" AND tmp." + UserIds.USER_ID + " LIKE ");
+                    qb.appendWhereEscapeString("%" + chunks[i] + "%");
+                }
+                qb.appendWhere(")");
+            }
+
+            mCursor = qb.query(mDatabase, new String[] { KeyRings.TABLE_NAME + "." + KeyRings._ID, // 0
+                    KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID, // 1
+                    UserIds.TABLE_NAME + "." + UserIds.USER_ID, // 2
+            }, KeyRings.TABLE_NAME + "." + KeyRings.TYPE + " = ?", new String[] { ""
+                    + (mKeyType == Id.type.public_key ? Id.database.type_public
+                            : Id.database.type_secret) }, null, null, UserIds.TABLE_NAME + "."
+                    + UserIds.USER_ID + " ASC");
+
+            // content provider way for reference, might have to go back to it sometime:
+            /*
+             * Uri contentUri = null; if (mKeyType == Id.type.secret_key) { contentUri =
+             * Apg.CONTENT_URI_SECRET_KEY_RINGS; } else { contentUri =
+             * Apg.CONTENT_URI_PUBLIC_KEY_RINGS; } mCursor = getContentResolver().query( contentUri,
+             * new String[] { DataProvider._ID, // 0 DataProvider.MASTER_KEY_ID, // 1
+             * DataProvider.USER_ID, // 2 }, null, null, null);
+             */
+
+            startManagingCursor(mCursor);
+            rebuild(false);
+        }
+
+        public void cleanup() {
+            if (mCursor != null) {
+                stopManagingCursor(mCursor);
+                mCursor.close();
+            }
+        }
+
+        public void rebuild(boolean requery) {
+            if (requery) {
+                mCursor.requery();
+            }
+            mChildren = new Vector<Vector<KeyChild>>();
+            for (int i = 0; i < mCursor.getCount(); ++i) {
+                mChildren.add(null);
+            }
+        }
+
+        protected Vector<KeyChild> getChildrenOfGroup(int groupPosition) {
+            Vector<KeyChild> children = mChildren.get(groupPosition);
+            if (children != null) {
+                return children;
+            }
+
+            mCursor.moveToPosition(groupPosition);
+            children = new Vector<KeyChild>();
+            Cursor c = mDatabase.query(Keys.TABLE_NAME, new String[] { Keys._ID, // 0
+                    Keys.KEY_ID, // 1
+                    Keys.IS_MASTER_KEY, // 2
+                    Keys.ALGORITHM, // 3
+                    Keys.KEY_SIZE, // 4
+                    Keys.CAN_SIGN, // 5
+                    Keys.CAN_ENCRYPT, // 6
+            }, Keys.KEY_RING_ID + " = ?", new String[] { mCursor.getString(0) }, null, null,
+                    Keys.RANK + " ASC");
+
+            int masterKeyId = -1;
+            long fingerPrintId = -1;
+            for (int i = 0; i < c.getCount(); ++i) {
+                c.moveToPosition(i);
+                children.add(new KeyChild(c.getLong(1), c.getInt(2) == 1, c.getInt(3), c.getInt(4),
+                        c.getInt(5) == 1, c.getInt(6) == 1));
+                if (i == 0) {
+                    masterKeyId = c.getInt(0);
+                    fingerPrintId = c.getLong(1);
+                }
+            }
+            c.close();
+
+            if (masterKeyId != -1) {
+                children.insertElementAt(new KeyChild(Apg.getFingerPrint(fingerPrintId), true), 0);
+                c = mDatabase.query(UserIds.TABLE_NAME, new String[] { UserIds.USER_ID, // 0
+                        }, UserIds.KEY_ID + " = ? AND " + UserIds.RANK + " > 0", new String[] { ""
+                                + masterKeyId }, null, null, UserIds.RANK + " ASC");
+
+                for (int i = 0; i < c.getCount(); ++i) {
+                    c.moveToPosition(i);
+                    children.add(new KeyChild(c.getString(0)));
+                }
+                c.close();
+            }
+
+            mChildren.set(groupPosition, children);
+            return children;
+        }
+
+        public boolean hasStableIds() {
+            return true;
+        }
+
+        public boolean isChildSelectable(int groupPosition, int childPosition) {
+            return true;
+        }
+
+        public int getGroupCount() {
+            return mCursor.getCount();
+        }
+
+        public Object getChild(int groupPosition, int childPosition) {
+            return null;
+        }
+
+        public long getChildId(int groupPosition, int childPosition) {
+            return childPosition;
+        }
+
+        public int getChildrenCount(int groupPosition) {
+            return getChildrenOfGroup(groupPosition).size();
+        }
+
+        public Object getGroup(int position) {
+            return position;
+        }
+
+        public long getGroupId(int position) {
+            mCursor.moveToPosition(position);
+            return mCursor.getLong(1); // MASTER_KEY_ID
+        }
+
+        public int getKeyRingId(int position) {
+            mCursor.moveToPosition(position);
+            return mCursor.getInt(0); // _ID
+        }
+
+        public View getGroupView(int groupPosition, boolean isExpanded, View convertView,
+                ViewGroup parent) {
+            mCursor.moveToPosition(groupPosition);
+
+            View view = mInflater.inflate(R.layout.key_list_group_item, null);
+            view.setBackgroundResource(android.R.drawable.list_selector_background);
+
+            TextView mainUserId = (TextView) view.findViewById(R.id.mainUserId);
+            mainUserId.setText("");
+            TextView mainUserIdRest = (TextView) view.findViewById(R.id.mainUserIdRest);
+            mainUserIdRest.setText("");
+
+            String userId = mCursor.getString(2); // USER_ID
+            if (userId != null) {
+                String chunks[] = userId.split(" <", 2);
+                userId = chunks[0];
+                if (chunks.length > 1) {
+                    mainUserIdRest.setText("<" + chunks[1]);
+                }
+                mainUserId.setText(userId);
+            }
+
+            if (mainUserId.getText().length() == 0) {
+                mainUserId.setText(R.string.unknownUserId);
+            }
+
+            if (mainUserIdRest.getText().length() == 0) {
+                mainUserIdRest.setVisibility(View.GONE);
+            }
+            return view;
+        }
+
+        public View getChildView(int groupPosition, int childPosition, boolean isLastChild,
+                View convertView, ViewGroup parent) {
+            mCursor.moveToPosition(groupPosition);
+
+            Vector<KeyChild> children = getChildrenOfGroup(groupPosition);
+
+            KeyChild child = children.get(childPosition);
+            View view = null;
+            switch (child.type) {
+            case KeyChild.KEY: {
+                if (child.isMasterKey) {
+                    view = mInflater.inflate(R.layout.key_list_child_item_master_key, null);
+                } else {
+                    view = mInflater.inflate(R.layout.key_list_child_item_sub_key, null);
+                }
+
+                TextView keyId = (TextView) view.findViewById(R.id.keyId);
+                String keyIdStr = Apg.getSmallFingerPrint(child.keyId);
+                keyId.setText(keyIdStr);
+                TextView keyDetails = (TextView) view.findViewById(R.id.keyDetails);
+                String algorithmStr = Apg.getAlgorithmInfo(child.algorithm, child.keySize);
+                keyDetails.setText("(" + algorithmStr + ")");
+
+                ImageView encryptIcon = (ImageView) view.findViewById(R.id.ic_encryptKey);
+                if (!child.canEncrypt) {
+                    encryptIcon.setVisibility(View.GONE);
+                }
+
+                ImageView signIcon = (ImageView) view.findViewById(R.id.ic_signKey);
+                if (!child.canSign) {
+                    signIcon.setVisibility(View.GONE);
+                }
+                break;
+            }
+
+            case KeyChild.USER_ID: {
+                view = mInflater.inflate(R.layout.key_list_child_item_user_id, null);
+                TextView userId = (TextView) view.findViewById(R.id.userId);
+                userId.setText(child.userId);
+                break;
+            }
+
+            case KeyChild.FINGER_PRINT: {
+                view = mInflater.inflate(R.layout.key_list_child_item_user_id, null);
+                TextView userId = (TextView) view.findViewById(R.id.userId);
+                userId.setText(getString(R.string.fingerprint) + ":\n"
+                        + child.fingerPrint.replace("  ", "\n"));
+                break;
+            }
+            }
+            return view;
+        }
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+        case Id.request.filename: {
+            if (resultCode == RESULT_OK && data != null) {
+                String filename = data.getDataString();
+                if (filename != null) {
+                    // Get rid of URI prefix:
+                    if (filename.startsWith("file://")) {
+                        filename = filename.substring(7);
+                    }
+                    // replace %20 and so on
+                    filename = Uri.decode(filename);
+
+                    FileDialog.setFilename(filename);
+                }
+            }
+            return;
+        }
+
+        default: {
+            break;
+        }
+        }
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/KeyServerExportActivity.java

@@ -0,0 +1,132 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.spongycastle.openpgp.PGPKeyRing;
+import org.spongycastle.openpgp.PGPPublicKeyRing;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.HkpKeyServer;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.R;
+
+import com.actionbarsherlock.view.MenuItem;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Message;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.Spinner;
+import android.widget.Toast;
+
+/**
+ * gpg --send-key activity
+ * 
+ * Sends the selected public key to a key server
+ */
+public class KeyServerExportActivity extends BaseActivity {
+
+    private Button export;
+    private Spinner keyServer;
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case android.R.id.home:
+            startActivity(new Intent(this, PublicKeyListActivity.class));
+            return true;
+
+        default:
+            break;
+
+        }
+        return false;
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.key_server_export_layout);
+
+        export = (Button) findViewById(R.id.btn_export_to_server);
+        keyServer = (Spinner) findViewById(R.id.keyServer);
+
+        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
+                android.R.layout.simple_spinner_item, mPreferences.getKeyServers());
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        keyServer.setAdapter(adapter);
+        if (adapter.getCount() > 0) {
+            keyServer.setSelection(0);
+        } else {
+            export.setEnabled(false);
+        }
+
+        export.setOnClickListener(new OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                startThread();
+            }
+        });
+    }
+
+    @Override
+    public void run() {
+        String error = null;
+        Bundle data = new Bundle();
+        Message msg = new Message();
+
+        HkpKeyServer server = new HkpKeyServer((String) keyServer.getSelectedItem());
+
+        int keyRingId = getIntent().getIntExtra(Apg.EXTRA_KEY_ID, -1);
+
+        PGPKeyRing keyring = Apg.getKeyRing(keyRingId);
+        if (keyring != null && keyring instanceof PGPPublicKeyRing) {
+            boolean uploaded = Apg.uploadKeyRingToServer(server, (PGPPublicKeyRing) keyring);
+            if (!uploaded) {
+                error = "Unable to export key to selected server";
+            }
+        }
+
+        data.putInt(Constants.extras.STATUS, Id.message.export_done);
+
+        if (error != null) {
+            data.putString(Apg.EXTRA_ERROR, error);
+        }
+
+        msg.setData(data);
+        sendMessage(msg);
+    }
+
+    @Override
+    public void doneCallback(Message msg) {
+        super.doneCallback(msg);
+
+        Bundle data = msg.getData();
+        String error = data.getString(Apg.EXTRA_ERROR);
+        if (error != null) {
+            Toast.makeText(this, getString(R.string.errorMessage, error), Toast.LENGTH_SHORT)
+                    .show();
+            return;
+        }
+
+        Toast.makeText(this, R.string.keySendSuccess, Toast.LENGTH_SHORT).show();
+        finish();
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/KeyServerPreferenceActivity.java

@@ -0,0 +1,128 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import java.util.Vector;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.ui.widget.Editor;
+import org.thialfihar.android.apg.ui.widget.KeyServerEditor;
+import org.thialfihar.android.apg.ui.widget.Editor.EditorListener;
+
+import com.actionbarsherlock.view.Menu;
+
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.Button;
+import android.widget.TextView;
+
+public class KeyServerPreferenceActivity extends BaseActivity implements OnClickListener,
+        EditorListener {
+    private LayoutInflater mInflater;
+    private ViewGroup mEditors;
+    private View mAdd;
+    private TextView mTitle;
+    private TextView mSummary;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.key_server_preference);
+
+        mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+
+        mTitle = (TextView) findViewById(R.id.title);
+        mSummary = (TextView) findViewById(R.id.summary);
+
+        mTitle.setText(R.string.label_keyServers);
+
+        mEditors = (ViewGroup) findViewById(R.id.editors);
+        mAdd = findViewById(R.id.add);
+        mAdd.setOnClickListener(this);
+
+        Intent intent = getIntent();
+        String servers[] = intent.getStringArrayExtra(Apg.EXTRA_KEY_SERVERS);
+        if (servers != null) {
+            for (int i = 0; i < servers.length; ++i) {
+                KeyServerEditor view = (KeyServerEditor) mInflater.inflate(
+                        R.layout.key_server_editor, mEditors, false);
+                view.setEditorListener(this);
+                view.setValue(servers[i]);
+                mEditors.addView(view);
+            }
+        }
+
+        Button okButton = (Button) findViewById(R.id.btn_ok);
+        okButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                okClicked();
+            }
+        });
+
+        Button cancelButton = (Button) findViewById(R.id.btn_cancel);
+        cancelButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                cancelClicked();
+            }
+        });
+    }
+
+    public void onDeleted(Editor editor) {
+        // nothing to do
+    }
+
+    public void onClick(View v) {
+        KeyServerEditor view = (KeyServerEditor) mInflater.inflate(R.layout.key_server_editor,
+                mEditors, false);
+        view.setEditorListener(this);
+        mEditors.addView(view);
+    }
+
+    private void cancelClicked() {
+        setResult(RESULT_CANCELED, null);
+        finish();
+    }
+
+    private void okClicked() {
+        Intent data = new Intent();
+        Vector<String> servers = new Vector<String>();
+        for (int i = 0; i < mEditors.getChildCount(); ++i) {
+            KeyServerEditor editor = (KeyServerEditor) mEditors.getChildAt(i);
+            String tmp = editor.getValue();
+            if (tmp.length() > 0) {
+                servers.add(tmp);
+            }
+        }
+        String[] dummy = new String[0];
+        data.putExtra(Apg.EXTRA_KEY_SERVERS, servers.toArray(dummy));
+        setResult(RESULT_OK, data);
+        finish();
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        // override this, so no option menu is added (as would be in BaseActivity), since
+        // we're still in preferences
+        return true;
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/KeyServerQueryActivity.java

@@ -0,0 +1,329 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import java.util.List;
+import java.util.Vector;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.HkpKeyServer;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.KeyServer.InsufficientQuery;
+import org.thialfihar.android.apg.KeyServer.KeyInfo;
+import org.thialfihar.android.apg.KeyServer.QueryException;
+import org.thialfihar.android.apg.KeyServer.TooManyResponses;
+
+import com.actionbarsherlock.view.MenuItem;
+
+import android.app.Activity;
+import android.app.Dialog;
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Message;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.BaseAdapter;
+import android.widget.Button;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.LinearLayout.LayoutParams;
+import android.widget.ListView;
+import android.widget.Spinner;
+import android.widget.TextView;
+import android.widget.Toast;
+
+public class KeyServerQueryActivity extends BaseActivity {
+    private ListView mList;
+    private EditText mQuery;
+    private Button mSearch;
+    private KeyInfoListAdapter mAdapter;
+    private Spinner mKeyServer;
+
+    private int mQueryType;
+    private String mQueryString;
+    private long mQueryId;
+    private volatile List<KeyInfo> mSearchResult;
+    private volatile String mKeyData;
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case android.R.id.home:
+            startActivity(new Intent(this, PublicKeyListActivity.class));
+            return true;
+
+        default:
+            break;
+
+        }
+        return false;
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.key_server_query_layout);
+
+        mQuery = (EditText) findViewById(R.id.query);
+        mSearch = (Button) findViewById(R.id.btn_search);
+        mList = (ListView) findViewById(R.id.list);
+        mAdapter = new KeyInfoListAdapter(this);
+        mList.setAdapter(mAdapter);
+
+        mKeyServer = (Spinner) findViewById(R.id.keyServer);
+        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
+                android.R.layout.simple_spinner_item, mPreferences.getKeyServers());
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        mKeyServer.setAdapter(adapter);
+        if (adapter.getCount() > 0) {
+            mKeyServer.setSelection(0);
+        } else {
+            mSearch.setEnabled(false);
+        }
+
+        mList.setOnItemClickListener(new OnItemClickListener() {
+            public void onItemClick(AdapterView<?> adapter, View view, int position, long keyId) {
+                get(keyId);
+            }
+        });
+
+        mSearch.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                String query = mQuery.getText().toString();
+                search(query);
+            }
+        });
+
+        Intent intent = getIntent();
+        if (Apg.Intent.LOOK_UP_KEY_ID.equals(intent.getAction())
+                || Apg.Intent.LOOK_UP_KEY_ID_AND_RETURN.equals(intent.getAction())) {
+            long keyId = intent.getLongExtra(Apg.EXTRA_KEY_ID, 0);
+            if (keyId != 0) {
+                String query = "0x" + Apg.keyToHex(keyId);
+                mQuery.setText(query);
+                search(query);
+            }
+        }
+    }
+
+    private void search(String query) {
+        showDialog(Id.dialog.querying);
+        mQueryType = Id.keyserver.search;
+        mQueryString = query;
+        mAdapter.setKeys(new Vector<KeyInfo>());
+        startThread();
+    }
+
+    private void get(long keyId) {
+        showDialog(Id.dialog.querying);
+        mQueryType = Id.keyserver.get;
+        mQueryId = keyId;
+        startThread();
+    }
+
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        ProgressDialog progress = (ProgressDialog) super.onCreateDialog(id);
+        progress.setMessage(this.getString(R.string.progress_queryingServer,
+                (String) mKeyServer.getSelectedItem()));
+        return progress;
+    }
+
+    @Override
+    public void run() {
+        String error = null;
+        Bundle data = new Bundle();
+        Message msg = new Message();
+
+        try {
+            HkpKeyServer server = new HkpKeyServer((String) mKeyServer.getSelectedItem());
+            if (mQueryType == Id.keyserver.search) {
+                mSearchResult = server.search(mQueryString);
+            } else if (mQueryType == Id.keyserver.get) {
+                mKeyData = server.get(mQueryId);
+            }
+        } catch (QueryException e) {
+            error = "" + e;
+        } catch (InsufficientQuery e) {
+            error = "Insufficient query.";
+        } catch (TooManyResponses e) {
+            error = "Too many responses.";
+        }
+
+        data.putInt(Constants.extras.STATUS, Id.message.done);
+
+        if (error != null) {
+            data.putString(Apg.EXTRA_ERROR, error);
+        }
+
+        msg.setData(data);
+        sendMessage(msg);
+    }
+
+    @Override
+    public void doneCallback(Message msg) {
+        super.doneCallback(msg);
+
+        removeDialog(Id.dialog.querying);
+
+        Bundle data = msg.getData();
+        String error = data.getString(Apg.EXTRA_ERROR);
+        if (error != null) {
+            Toast.makeText(this, getString(R.string.errorMessage, error), Toast.LENGTH_SHORT)
+                    .show();
+            return;
+        }
+
+        if (mQueryType == Id.keyserver.search) {
+            if (mSearchResult != null) {
+                Toast.makeText(this, getString(R.string.keysFound, mSearchResult.size()),
+                        Toast.LENGTH_SHORT).show();
+                mAdapter.setKeys(mSearchResult);
+            }
+        } else if (mQueryType == Id.keyserver.get) {
+            Intent orgIntent = getIntent();
+            if (Apg.Intent.LOOK_UP_KEY_ID_AND_RETURN.equals(orgIntent.getAction())) {
+                if (mKeyData != null) {
+                    Intent intent = new Intent();
+                    intent.putExtra(Apg.EXTRA_TEXT, mKeyData);
+                    setResult(RESULT_OK, intent);
+                } else {
+                    setResult(RESULT_CANCELED);
+                }
+                finish();
+            } else {
+                if (mKeyData != null) {
+                    Intent intent = new Intent(this, PublicKeyListActivity.class);
+                    intent.setAction(Apg.Intent.IMPORT);
+                    intent.putExtra(Apg.EXTRA_TEXT, mKeyData);
+                    startActivity(intent);
+                }
+            }
+        }
+    }
+
+    public class KeyInfoListAdapter extends BaseAdapter {
+        protected LayoutInflater mInflater;
+        protected Activity mActivity;
+        protected List<KeyInfo> mKeys;
+
+        public KeyInfoListAdapter(Activity activity) {
+            mActivity = activity;
+            mInflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+            mKeys = new Vector<KeyInfo>();
+        }
+
+        public void setKeys(List<KeyInfo> keys) {
+            mKeys = keys;
+            notifyDataSetChanged();
+        }
+
+        @Override
+        public boolean hasStableIds() {
+            return true;
+        }
+
+        public int getCount() {
+            return mKeys.size();
+        }
+
+        public Object getItem(int position) {
+            return mKeys.get(position);
+        }
+
+        public long getItemId(int position) {
+            return mKeys.get(position).keyId;
+        }
+
+        public View getView(int position, View convertView, ViewGroup parent) {
+            KeyInfo keyInfo = mKeys.get(position);
+
+            View view = mInflater.inflate(R.layout.key_server_query_result_item, null);
+
+            TextView mainUserId = (TextView) view.findViewById(R.id.mainUserId);
+            mainUserId.setText(R.string.unknownUserId);
+            TextView mainUserIdRest = (TextView) view.findViewById(R.id.mainUserIdRest);
+            mainUserIdRest.setText("");
+            TextView keyId = (TextView) view.findViewById(R.id.keyId);
+            keyId.setText(R.string.noKey);
+            TextView algorithm = (TextView) view.findViewById(R.id.algorithm);
+            algorithm.setText("");
+            TextView status = (TextView) view.findViewById(R.id.status);
+            status.setText("");
+
+            String userId = keyInfo.userIds.get(0);
+            if (userId != null) {
+                String chunks[] = userId.split(" <", 2);
+                userId = chunks[0];
+                if (chunks.length > 1) {
+                    mainUserIdRest.setText("<" + chunks[1]);
+                }
+                mainUserId.setText(userId);
+            }
+
+            keyId.setText(Apg.getSmallFingerPrint(keyInfo.keyId));
+
+            if (mainUserIdRest.getText().length() == 0) {
+                mainUserIdRest.setVisibility(View.GONE);
+            }
+
+            algorithm.setText("" + keyInfo.size + "/" + keyInfo.algorithm);
+
+            if (keyInfo.revoked != null) {
+                status.setText("revoked");
+            } else {
+                status.setVisibility(View.GONE);
+            }
+
+            LinearLayout ll = (LinearLayout) view.findViewById(R.id.list);
+            if (keyInfo.userIds.size() == 1) {
+                ll.setVisibility(View.GONE);
+            } else {
+                boolean first = true;
+                boolean second = true;
+                for (String uid : keyInfo.userIds) {
+                    if (first) {
+                        first = false;
+                        continue;
+                    }
+                    if (!second) {
+                        View sep = new View(mActivity);
+                        sep.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT, 1));
+                        sep.setBackgroundResource(android.R.drawable.divider_horizontal_dark);
+                        ll.addView(sep);
+                    }
+                    TextView uidView = (TextView) mInflater.inflate(
+                            R.layout.key_server_query_result_user_id, null);
+                    uidView.setText(uid);
+                    ll.addView(uidView);
+                    second = false;
+                }
+            }
+
+            return view;
+        }
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/MailListActivity.java

@@ -0,0 +1,221 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import java.util.Vector;
+import java.util.regex.Matcher;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Preferences;
+
+import android.app.ListActivity;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Bundle;
+import android.text.Html;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.BaseAdapter;
+import android.widget.ImageView;
+import android.widget.ListAdapter;
+import android.widget.TextView;
+
+public class MailListActivity extends ListActivity {
+    LayoutInflater mInflater = null;
+
+    public static final String EXTRA_ACCOUNT = "account";
+
+    private static class Conversation {
+        public long id;
+        public String subject;
+        public Vector<Message> messages;
+
+        public Conversation(long id, String subject) {
+            this.id = id;
+            this.subject = subject;
+        }
+    }
+
+    private static class Message {
+        public Conversation parent;
+        public long id;
+        public String subject;
+        public String fromAddress;
+        public String data;
+        public String replyTo;
+        public boolean signedOnly;
+
+        public Message(Conversation parent, long id, String subject,
+                       String fromAddress, String replyTo,
+                       String data, boolean signedOnly) {
+            this.parent = parent;
+            this.id = id;
+            this.subject = subject;
+            this.fromAddress = fromAddress;
+            this.replyTo = replyTo;
+            this.data = data;
+            if (this.replyTo == null || this.replyTo.equals("")) {
+                this.replyTo = this.fromAddress;
+            }
+            this.signedOnly = signedOnly;
+        }
+    }
+
+    private Vector<Conversation> mConversations;
+    private Vector<Message> mMessages;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        Preferences prefs = Preferences.getPreferences(this);
+
+        super.onCreate(savedInstanceState);
+
+        mInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+
+        mConversations = new Vector<Conversation>();
+        mMessages = new Vector<Message>();
+
+        String account = getIntent().getExtras().getString(EXTRA_ACCOUNT);
+        // TODO: what if account is null?
+        Uri uri = Uri.parse("content://gmail-ls/conversations/" + account);
+        Cursor cursor =
+                managedQuery(uri, new String[] { "conversation_id", "subject" }, null, null, null);
+        for (int i = 0; i < cursor.getCount(); ++i) {
+            cursor.moveToPosition(i);
+
+            int idIndex = cursor.getColumnIndex("conversation_id");
+            int subjectIndex = cursor.getColumnIndex("subject");
+            long conversationId = cursor.getLong(idIndex);
+            Conversation conversation =
+                    new Conversation(conversationId, cursor.getString(subjectIndex));
+            Uri messageUri = Uri.withAppendedPath(uri, "" + conversationId + "/messages");
+            Cursor messageCursor =
+                    managedQuery(messageUri, new String[] {
+                            "messageId",
+                            "subject",
+                            "fromAddress",
+                            "replyToAddresses",
+                            "body" }, null, null, null);
+            Vector<Message> messages = new Vector<Message>();
+            for (int j = 0; j < messageCursor.getCount(); ++j) {
+                messageCursor.moveToPosition(j);
+                idIndex = messageCursor.getColumnIndex("messageId");
+                subjectIndex = messageCursor.getColumnIndex("subject");
+                int fromAddressIndex = messageCursor.getColumnIndex("fromAddress");
+                int replyToIndex = messageCursor.getColumnIndex("replyToAddresses");
+                int bodyIndex = messageCursor.getColumnIndex("body");
+                String data = messageCursor.getString(bodyIndex);
+                data = Html.fromHtml(data).toString();
+                boolean signedOnly = false;
+                Matcher matcher = Apg.PGP_MESSAGE.matcher(data);
+                if (matcher.matches()) {
+                    data = matcher.group(1);
+                } else {
+                    matcher = Apg.PGP_SIGNED_MESSAGE.matcher(data);
+                    if (matcher.matches()) {
+                        data = matcher.group(1);
+                        signedOnly = true;
+                    } else {
+                        data = null;
+                    }
+                }
+                Message message =
+                        new Message(conversation,
+                                    messageCursor.getLong(idIndex),
+                                    messageCursor.getString(subjectIndex),
+                                    messageCursor.getString(fromAddressIndex),
+                                    messageCursor.getString(replyToIndex),
+                                    data, signedOnly);
+
+                messages.add(message);
+                mMessages.add(message);
+            }
+            conversation.messages = messages;
+            mConversations.add(conversation);
+        }
+
+        setListAdapter(new MailboxAdapter());
+        getListView().setOnItemClickListener(new OnItemClickListener() {
+            public void onItemClick(AdapterView<?> arg0, View v, int position, long id) {
+                Intent intent = new Intent(MailListActivity.this, DecryptActivity.class);
+                intent.setAction(Apg.Intent.DECRYPT);
+                Message message = (Message) ((MailboxAdapter) getListAdapter()).getItem(position);
+                intent.putExtra(Apg.EXTRA_TEXT, message.data);
+                intent.putExtra(Apg.EXTRA_SUBJECT, message.subject);
+                intent.putExtra(Apg.EXTRA_REPLY_TO, message.replyTo);
+                startActivity(intent);
+            }
+        });
+    }
+
+    private class MailboxAdapter extends BaseAdapter implements ListAdapter {
+
+        @Override
+        public boolean isEnabled(int position) {
+            Message message = (Message) getItem(position);
+            return message.data != null;
+        }
+
+        @Override
+        public boolean hasStableIds() {
+            return true;
+        }
+
+        public int getCount() {
+            return mMessages.size();
+        }
+
+        public Object getItem(int position) {
+            return mMessages.get(position);
+        }
+
+        public long getItemId(int position) {
+            return mMessages.get(position).id;
+        }
+
+        public View getView(int position, View convertView, ViewGroup parent) {
+            View view = mInflater.inflate(R.layout.mailbox_message_item, null);
+
+            Message message = (Message) getItem(position);
+
+            TextView subject = (TextView) view.findViewById(R.id.subject);
+            TextView email = (TextView) view.findViewById(R.id.emailAddress);
+            ImageView status = (ImageView) view.findViewById(R.id.ic_status);
+
+            subject.setText(message.subject);
+            email.setText(message.fromAddress);
+            if (message.data != null) {
+                if (message.signedOnly) {
+                    status.setImageResource(R.drawable.signed);
+                } else {
+                    status.setImageResource(R.drawable.encrypted);
+                }
+                status.setVisibility(View.VISIBLE);
+            } else {
+                status.setVisibility(View.INVISIBLE);
+            }
+
+            return view;
+        }
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/MainActivity.java

@@ -0,0 +1,213 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import java.security.Security;
+
+import org.spongycastle.jce.provider.BouncyCastleProvider;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.R;
+
+import com.actionbarsherlock.app.ActionBar;
+import com.actionbarsherlock.view.Menu;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.app.Dialog;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.view.View;
+import android.widget.TextView;
+
+public class MainActivity extends BaseActivity {
+    static {
+        Security.addProvider(new BouncyCastleProvider());
+    }
+
+    public void manageKeysOnClick(View view) {
+        startActivity(new Intent(this, PublicKeyListActivity.class));
+    }
+
+    public void myKeysOnClick(View view) {
+        startActivity(new Intent(this, SecretKeyListActivity.class));
+    }
+
+    public void encryptOnClick(View view) {
+        Intent intent = new Intent(MainActivity.this, EncryptActivity.class);
+        intent.setAction(Apg.Intent.ENCRYPT);
+        startActivity(intent);
+    }
+
+    public void decryptOnClick(View view) {
+        Intent intent = new Intent(MainActivity.this, DecryptActivity.class);
+        intent.setAction(Apg.Intent.DECRYPT);
+        startActivity(intent);
+    }
+
+    public void scanQrcodeOnClick(View view) {
+        Intent intent = new Intent(this, ImportFromQRCodeActivity.class);
+        intent.setAction(Apg.Intent.IMPORT_FROM_QR_CODE);
+        startActivityForResult(intent, Id.request.import_from_qr_code);
+    }
+
+    public void helpOnClick(View view) {
+        startActivity(new Intent(this, HelpActivity.class));
+    }
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.main);
+
+        final ActionBar actionBar = getSupportActionBar();
+        actionBar.setDisplayShowTitleEnabled(true);
+        actionBar.setDisplayHomeAsUpEnabled(false);
+        actionBar.setHomeButtonEnabled(false);
+
+        // if (!mPreferences.hasSeenHelp()) {
+        // showDialog(Id.dialog.help);
+        // }
+        //
+        // if (Apg.isReleaseVersion(this) && !mPreferences.hasSeenChangeLog(Apg.getVersion(this))) {
+        // showDialog(Id.dialog.change_log);
+        // }
+    }
+
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        switch (id) {
+
+        // case Id.dialog.change_log: {
+        // AlertDialog.Builder alert = new AlertDialog.Builder(this);
+        //
+        // alert.setTitle("Changes " + Apg.getFullVersion(this));
+        // LayoutInflater inflater = (LayoutInflater) this
+        // .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        // View layout = inflater.inflate(R.layout.info, null);
+        // TextView message = (TextView) layout.findViewById(R.id.message);
+        //
+        // message.setText("Changes:\n" + "* \n" + "\n"
+        // + "WARNING: be careful editing your existing keys, as they "
+        // + "WILL be stripped of certificates right now.\n" + "\n"
+        // + "Also: key cross-certification is NOT supported, so signing "
+        // + "with those keys will get a warning when the signature is " + "checked.\n"
+        // + "\n" + "I hope APG continues to be useful to you, please send "
+        // + "bug reports, feature wishes, feedback.");
+        // alert.setView(layout);
+        //
+        // alert.setCancelable(false);
+        // alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+        // public void onClick(DialogInterface dialog, int id) {
+        // MainActivity.this.removeDialog(Id.dialog.change_log);
+        // mPreferences.setHasSeenChangeLog(Apg.getVersion(MainActivity.this), true);
+        // }
+        // });
+        //
+        // return alert.create();
+        // }
+
+        // case Id.dialog.help: {
+        // AlertDialog.Builder alert = new AlertDialog.Builder(this);
+        //
+        // alert.setTitle(R.string.title_help);
+        //
+        // LayoutInflater inflater = (LayoutInflater) this
+        // .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+        // View layout = inflater.inflate(R.layout.info, null);
+        // TextView message = (TextView) layout.findViewById(R.id.message);
+        // message.setText(R.string.text_help);
+        //
+        // TransformFilter packageNames = new TransformFilter() {
+        // public final String transformUrl(final Matcher match, String url) {
+        // String name = match.group(1).toLowerCase();
+        // if (name.equals("astro")) {
+        // return "com.metago.astro";
+        // } else if (name.equals("k-9 mail")) {
+        // return "com.fsck.k9";
+        // } else {
+        // return "org.openintents.filemanager";
+        // }
+        // }
+        // };
+        //
+        // Pattern pattern = Pattern.compile("(OI File Manager|ASTRO|K-9 Mail)");
+        // String scheme = "market://search?q=pname:";
+        // message.setAutoLinkMask(0);
+        // Linkify.addLinks(message, pattern, scheme, null, packageNames);
+        //
+        // alert.setView(layout);
+        //
+        // alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+        // public void onClick(DialogInterface dialog, int id) {
+        // MainActivity.this.removeDialog(Id.dialog.help);
+        // mPreferences.setHasSeenHelp(true);
+        // }
+        // });
+        //
+        // return alert.create();
+        // }
+
+        default: {
+            return super.onCreateDialog(id);
+        }
+        }
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        menu.add(0, Id.menu.option.preferences, 0, R.string.menu_preferences)
+                .setIcon(R.drawable.ic_menu_settings)
+                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+        menu.add(0, Id.menu.option.about, 1, R.string.menu_about).setIcon(R.drawable.ic_menu_about)
+                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+        case Id.menu.option.about: {
+            startActivity(new Intent(this, AboutActivity.class));
+            return true;
+        }
+
+        case Id.menu.option.preferences: {
+            startActivity(new Intent(this, PreferencesActivity.class));
+            return true;
+        }
+
+        default: {
+            break;
+        }
+        }
+        return false;
+    }
+
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
+        super.onCreateContextMenu(menu, v, menuInfo);
+
+        TextView nameTextView = (TextView) v.findViewById(R.id.accountName);
+        if (nameTextView != null) {
+            menu.setHeaderTitle(nameTextView.getText());
+            menu.add(0, Id.menu.delete, 0, R.string.menu_deleteAccount);
+        }
+    }
+
+}

org_apg/src/org/thialfihar/android/apg/ui/PreferencesActivity.java

@@ -0,0 +1,237 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.spongycastle.bcpg.HashAlgorithmTags;
+import org.spongycastle.openpgp.PGPEncryptedData;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.Preferences;
+import org.thialfihar.android.apg.ui.widget.IntegerListPreference;
+import org.thialfihar.android.apg.R;
+
+import com.actionbarsherlock.app.ActionBar;
+import com.actionbarsherlock.app.SherlockPreferenceActivity;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.preference.CheckBoxPreference;
+import android.preference.Preference;
+import android.preference.PreferenceScreen;
+
+
+public class PreferencesActivity extends SherlockPreferenceActivity {
+    private IntegerListPreference mPassPhraseCacheTtl = null;
+    private IntegerListPreference mEncryptionAlgorithm = null;
+    private IntegerListPreference mHashAlgorithm = null;
+    private IntegerListPreference mMessageCompression = null;
+    private IntegerListPreference mFileCompression = null;
+    private CheckBoxPreference mAsciiArmour = null;
+    private CheckBoxPreference mForceV3Signatures = null;
+    private PreferenceScreen mKeyServerPreference = null;
+    private Preferences mPreferences;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        mPreferences = Preferences.getPreferences(this);
+        super.onCreate(savedInstanceState);
+
+        final ActionBar actionBar = getSupportActionBar();
+        actionBar.setDisplayShowTitleEnabled(true);
+        actionBar.setDisplayHomeAsUpEnabled(true);
+
+        addPreferencesFromResource(R.xml.apg_preferences);
+
+        mPassPhraseCacheTtl = (IntegerListPreference) findPreference(Constants.pref.PASS_PHRASE_CACHE_TTL);
+        mPassPhraseCacheTtl.setValue("" + mPreferences.getPassPhraseCacheTtl());
+        mPassPhraseCacheTtl.setSummary(mPassPhraseCacheTtl.getEntry());
+        mPassPhraseCacheTtl
+                .setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                    public boolean onPreferenceChange(Preference preference, Object newValue) {
+                        mPassPhraseCacheTtl.setValue(newValue.toString());
+                        mPassPhraseCacheTtl.setSummary(mPassPhraseCacheTtl.getEntry());
+                        mPreferences.setPassPhraseCacheTtl(Integer.parseInt(newValue.toString()));
+                        BaseActivity.startCacheService(PreferencesActivity.this, mPreferences);
+                        return false;
+                    }
+                });
+
+        mEncryptionAlgorithm = (IntegerListPreference) findPreference(Constants.pref.DEFAULT_ENCRYPTION_ALGORITHM);
+        int valueIds[] = { PGPEncryptedData.AES_128, PGPEncryptedData.AES_192,
+                PGPEncryptedData.AES_256, PGPEncryptedData.BLOWFISH, PGPEncryptedData.TWOFISH,
+                PGPEncryptedData.CAST5, PGPEncryptedData.DES, PGPEncryptedData.TRIPLE_DES,
+                PGPEncryptedData.IDEA, };
+        String entries[] = { "AES-128", "AES-192", "AES-256", "Blowfish", "Twofish", "CAST5",
+                "DES", "Triple DES", "IDEA", };
+        String values[] = new String[valueIds.length];
+        for (int i = 0; i < values.length; ++i) {
+            values[i] = "" + valueIds[i];
+        }
+        mEncryptionAlgorithm.setEntries(entries);
+        mEncryptionAlgorithm.setEntryValues(values);
+        mEncryptionAlgorithm.setValue("" + mPreferences.getDefaultEncryptionAlgorithm());
+        mEncryptionAlgorithm.setSummary(mEncryptionAlgorithm.getEntry());
+        mEncryptionAlgorithm
+                .setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                    public boolean onPreferenceChange(Preference preference, Object newValue) {
+                        mEncryptionAlgorithm.setValue(newValue.toString());
+                        mEncryptionAlgorithm.setSummary(mEncryptionAlgorithm.getEntry());
+                        mPreferences.setDefaultEncryptionAlgorithm(Integer.parseInt(newValue
+                                .toString()));
+                        return false;
+                    }
+                });
+
+        mHashAlgorithm = (IntegerListPreference) findPreference(Constants.pref.DEFAULT_HASH_ALGORITHM);
+        valueIds = new int[] { HashAlgorithmTags.MD5, HashAlgorithmTags.RIPEMD160,
+                HashAlgorithmTags.SHA1, HashAlgorithmTags.SHA224, HashAlgorithmTags.SHA256,
+                HashAlgorithmTags.SHA384, HashAlgorithmTags.SHA512, };
+        entries = new String[] { "MD5", "RIPEMD-160", "SHA-1", "SHA-224", "SHA-256", "SHA-384",
+                "SHA-512", };
+        values = new String[valueIds.length];
+        for (int i = 0; i < values.length; ++i) {
+            values[i] = "" + valueIds[i];
+        }
+        mHashAlgorithm.setEntries(entries);
+        mHashAlgorithm.setEntryValues(values);
+        mHashAlgorithm.setValue("" + mPreferences.getDefaultHashAlgorithm());
+        mHashAlgorithm.setSummary(mHashAlgorithm.getEntry());
+        mHashAlgorithm.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            public boolean onPreferenceChange(Preference preference, Object newValue) {
+                mHashAlgorithm.setValue(newValue.toString());
+                mHashAlgorithm.setSummary(mHashAlgorithm.getEntry());
+                mPreferences.setDefaultHashAlgorithm(Integer.parseInt(newValue.toString()));
+                return false;
+            }
+        });
+
+        mMessageCompression = (IntegerListPreference) findPreference(Constants.pref.DEFAULT_MESSAGE_COMPRESSION);
+        valueIds = new int[] { Id.choice.compression.none, Id.choice.compression.zip,
+                Id.choice.compression.zlib, Id.choice.compression.bzip2, };
+        entries = new String[] {
+                getString(R.string.choice_none) + " (" + getString(R.string.fast) + ")",
+                "ZIP (" + getString(R.string.fast) + ")",
+                "ZLIB (" + getString(R.string.fast) + ")",
+                "BZIP2 (" + getString(R.string.very_slow) + ")", };
+        values = new String[valueIds.length];
+        for (int i = 0; i < values.length; ++i) {
+            values[i] = "" + valueIds[i];
+        }
+        mMessageCompression.setEntries(entries);
+        mMessageCompression.setEntryValues(values);
+        mMessageCompression.setValue("" + mPreferences.getDefaultMessageCompression());
+        mMessageCompression.setSummary(mMessageCompression.getEntry());
+        mMessageCompression
+                .setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                    public boolean onPreferenceChange(Preference preference, Object newValue) {
+                        mMessageCompression.setValue(newValue.toString());
+                        mMessageCompression.setSummary(mMessageCompression.getEntry());
+                        mPreferences.setDefaultMessageCompression(Integer.parseInt(newValue
+                                .toString()));
+                        return false;
+                    }
+                });
+
+        mFileCompression = (IntegerListPreference) findPreference(Constants.pref.DEFAULT_FILE_COMPRESSION);
+        mFileCompression.setEntries(entries);
+        mFileCompression.setEntryValues(values);
+        mFileCompression.setValue("" + mPreferences.getDefaultFileCompression());
+        mFileCompression.setSummary(mFileCompression.getEntry());
+        mFileCompression.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            public boolean onPreferenceChange(Preference preference, Object newValue) {
+                mFileCompression.setValue(newValue.toString());
+                mFileCompression.setSummary(mFileCompression.getEntry());
+                mPreferences.setDefaultFileCompression(Integer.parseInt(newValue.toString()));
+                return false;
+            }
+        });
+
+        mAsciiArmour = (CheckBoxPreference) findPreference(Constants.pref.DEFAULT_ASCII_ARMOUR);
+        mAsciiArmour.setChecked(mPreferences.getDefaultAsciiArmour());
+        mAsciiArmour.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+            public boolean onPreferenceChange(Preference preference, Object newValue) {
+                mAsciiArmour.setChecked((Boolean) newValue);
+                mPreferences.setDefaultAsciiArmour((Boolean) newValue);
+                return false;
+            }
+        });
+
+        mForceV3Signatures = (CheckBoxPreference) findPreference(Constants.pref.FORCE_V3_SIGNATURES);
+        mForceV3Signatures.setChecked(mPreferences.getForceV3Signatures());
+        mForceV3Signatures
+                .setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
+                    public boolean onPreferenceChange(Preference preference, Object newValue) {
+                        mForceV3Signatures.setChecked((Boolean) newValue);
+                        mPreferences.setForceV3Signatures((Boolean) newValue);
+                        return false;
+                    }
+                });
+
+        mKeyServerPreference = (PreferenceScreen) findPreference(Constants.pref.KEY_SERVERS);
+        String servers[] = mPreferences.getKeyServers();
+        mKeyServerPreference.setSummary(getResources().getString(R.string.nKeyServers,
+                servers.length));
+        mKeyServerPreference
+                .setOnPreferenceClickListener(new Preference.OnPreferenceClickListener() {
+                    public boolean onPreferenceClick(Preference preference) {
+                        Intent intent = new Intent(PreferencesActivity.this,
+                                KeyServerPreferenceActivity.class);
+                        intent.putExtra(Apg.EXTRA_KEY_SERVERS, mPreferences.getKeyServers());
+                        startActivityForResult(intent, Id.request.key_server_preference);
+                        return false;
+                    }
+                });
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+        case Id.request.key_server_preference: {
+            if (resultCode == RESULT_CANCELED || data == null) {
+                return;
+            }
+            String servers[] = data.getStringArrayExtra(Apg.EXTRA_KEY_SERVERS);
+            mPreferences.setKeyServers(servers);
+            mKeyServerPreference.setSummary(getResources().getString(R.string.nKeyServers,
+                    servers.length));
+            break;
+        }
+
+        default: {
+            super.onActivityResult(requestCode, resultCode, data);
+            break;
+        }
+        }
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case android.R.id.home:
+            startActivity(new Intent(this, MainActivity.class));
+            return true;
+
+        default:
+            break;
+
+        }
+        return false;
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/PublicKeyListActivity.java

@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.spongycastle.openpgp.PGPPublicKeyRing;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.R;
+
+import com.actionbarsherlock.view.Menu;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.view.View;
+import android.widget.ExpandableListView;
+import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
+
+public class PublicKeyListActivity extends KeyListActivity {
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        mExportFilename = Constants.path.APP_DIR + "/pubexport.asc";
+        mKeyType = Id.type.public_key;
+        super.onCreate(savedInstanceState);
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        menu.add(1, Id.menu.option.search, 0, R.string.menu_search)
+                .setIcon(R.drawable.ic_menu_search).setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
+        menu.add(1, Id.menu.option.scanQRCode, 1, R.string.menu_scanQRCode)
+                .setIcon(R.drawable.ic_menu_scan_qrcode)
+                .setShowAsAction(
+                        MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        menu.add(1, Id.menu.option.key_server, 2, R.string.menu_keyServer)
+                .setIcon(R.drawable.ic_menu_search_list)
+                .setShowAsAction(
+                        MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        menu.add(0, Id.menu.option.import_keys, 3, R.string.menu_importKeys).setShowAsAction(
+                MenuItem.SHOW_AS_ACTION_NEVER | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        menu.add(0, Id.menu.option.export_keys, 4, R.string.menu_exportKeys).setShowAsAction(
+                MenuItem.SHOW_AS_ACTION_NEVER | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+        case Id.menu.option.key_server: {
+            startActivity(new Intent(this, KeyServerQueryActivity.class));
+
+            return true;
+        }
+        case Id.menu.option.scanQRCode: {
+            Intent intent = new Intent(this, ImportFromQRCodeActivity.class);
+            intent.setAction(Apg.Intent.IMPORT_FROM_QR_CODE);
+            startActivityForResult(intent, Id.request.import_from_qr_code);
+
+            return true;
+        }
+
+        default: {
+            return super.onOptionsItemSelected(item);
+        }
+        }
+    }
+
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
+        super.onCreateContextMenu(menu, v, menuInfo);
+        ExpandableListView.ExpandableListContextMenuInfo info = (ExpandableListView.ExpandableListContextMenuInfo) menuInfo;
+        int type = ExpandableListView.getPackedPositionType(info.packedPosition);
+
+        if (type == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
+            // TODO: user id? menu.setHeaderTitle("Key");
+            menu.add(0, Id.menu.export, 0, R.string.menu_exportKey);
+            menu.add(0, Id.menu.delete, 1, R.string.menu_deleteKey);
+            menu.add(0, Id.menu.update, 1, R.string.menu_updateKey);
+            menu.add(0, Id.menu.exportToServer, 1, R.string.menu_exportKeyToServer);
+            menu.add(0, Id.menu.signKey, 1, R.string.menu_signKey);
+        }
+    }
+
+    @Override
+    public boolean onContextItemSelected(android.view.MenuItem menuItem) {
+        ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) menuItem.getMenuInfo();
+        int type = ExpandableListView.getPackedPositionType(info.packedPosition);
+        int groupPosition = ExpandableListView.getPackedPositionGroup(info.packedPosition);
+
+        if (type != ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
+            return super.onContextItemSelected(menuItem);
+        }
+
+        switch (menuItem.getItemId()) {
+        case Id.menu.update: {
+            mSelectedItem = groupPosition;
+            final int keyRingId = mListAdapter.getKeyRingId(groupPosition);
+            long keyId = 0;
+            Object keyRing = Apg.getKeyRing(keyRingId);
+            if (keyRing != null && keyRing instanceof PGPPublicKeyRing) {
+                keyId = Apg.getMasterKey((PGPPublicKeyRing) keyRing).getKeyID();
+            }
+            if (keyId == 0) {
+                // this shouldn't happen
+                return true;
+            }
+
+            Intent intent = new Intent(this, KeyServerQueryActivity.class);
+            intent.setAction(Apg.Intent.LOOK_UP_KEY_ID_AND_RETURN);
+            intent.putExtra(Apg.EXTRA_KEY_ID, keyId);
+            startActivityForResult(intent, Id.request.look_up_key_id);
+
+            return true;
+        }
+
+        case Id.menu.exportToServer: {
+            mSelectedItem = groupPosition;
+            final int keyRingId = mListAdapter.getKeyRingId(groupPosition);
+
+            Intent intent = new Intent(this, KeyServerExportActivity.class);
+            intent.setAction(Apg.Intent.EXPORT_KEY_TO_SERVER);
+            intent.putExtra(Apg.EXTRA_KEY_ID, keyRingId);
+            startActivityForResult(intent, Id.request.export_to_server);
+
+            return true;
+        }
+
+        case Id.menu.signKey: {
+            mSelectedItem = groupPosition;
+            final int keyRingId = mListAdapter.getKeyRingId(groupPosition);
+            long keyId = 0;
+            Object keyRing = Apg.getKeyRing(keyRingId);
+            if (keyRing != null && keyRing instanceof PGPPublicKeyRing) {
+                keyId = Apg.getMasterKey((PGPPublicKeyRing) keyRing).getKeyID();
+            }
+
+            if (keyId == 0) {
+                // this shouldn't happen
+                return true;
+            }
+
+            Intent intent = new Intent(this, SignKeyActivity.class);
+            intent.putExtra(Apg.EXTRA_KEY_ID, keyId);
+            startActivity(intent);
+
+            return true;
+        }
+
+        default: {
+            return super.onContextItemSelected(menuItem);
+        }
+        }
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+        case Id.request.look_up_key_id: {
+            if (resultCode == RESULT_CANCELED || data == null
+                    || data.getStringExtra(Apg.EXTRA_TEXT) == null) {
+                return;
+            }
+
+            Intent intent = new Intent(this, PublicKeyListActivity.class);
+            intent.setAction(Apg.Intent.IMPORT);
+            intent.putExtra(Apg.EXTRA_TEXT, data.getStringExtra(Apg.EXTRA_TEXT));
+            handleIntent(intent);
+            break;
+        }
+
+        default: {
+            super.onActivityResult(requestCode, resultCode, data);
+            break;
+        }
+        }
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/SecretKeyListActivity.java

@@ -0,0 +1,196 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.AskForSecretKeyPassPhrase;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.Id;
+
+import com.actionbarsherlock.view.Menu;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.app.Dialog;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.ContextMenu;
+import android.view.ContextMenu.ContextMenuInfo;
+import android.view.View;
+import android.widget.ExpandableListView;
+import android.widget.ExpandableListView.ExpandableListContextMenuInfo;
+import android.widget.ExpandableListView.OnChildClickListener;
+
+import com.google.zxing.integration.android.IntentIntegrator;
+
+public class SecretKeyListActivity extends KeyListActivity implements OnChildClickListener {
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        mExportFilename = Constants.path.APP_DIR + "/secexport.asc";
+        mKeyType = Id.type.secret_key;
+        super.onCreate(savedInstanceState);
+        mList.setOnChildClickListener(this);
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        menu.add(3, Id.menu.option.search, 0, R.string.menu_search)
+                .setIcon(R.drawable.ic_menu_search).setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
+        menu.add(1, Id.menu.option.create, 1, R.string.menu_createKey).setShowAsAction(
+                MenuItem.SHOW_AS_ACTION_IF_ROOM | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        menu.add(0, Id.menu.option.import_keys, 2, R.string.menu_importKeys).setShowAsAction(
+                MenuItem.SHOW_AS_ACTION_NEVER | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        menu.add(0, Id.menu.option.export_keys, 3, R.string.menu_exportKeys).setShowAsAction(
+                MenuItem.SHOW_AS_ACTION_NEVER | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+        case Id.menu.option.create: {
+            createKey();
+            return true;
+        }
+
+        default: {
+            return super.onOptionsItemSelected(item);
+        }
+        }
+    }
+
+    @Override
+    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
+        super.onCreateContextMenu(menu, v, menuInfo);
+        ExpandableListView.ExpandableListContextMenuInfo info = (ExpandableListView.ExpandableListContextMenuInfo) menuInfo;
+        int type = ExpandableListView.getPackedPositionType(info.packedPosition);
+
+        if (type == ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
+            // TODO: user id? menu.setHeaderTitle("Key");
+            menu.add(0, Id.menu.edit, 0, R.string.menu_editKey);
+            menu.add(0, Id.menu.export, 1, R.string.menu_exportKey);
+            menu.add(0, Id.menu.delete, 2, R.string.menu_deleteKey);
+            menu.add(0, Id.menu.share, 2, R.string.menu_share);
+        }
+    }
+
+    @Override
+    public boolean onContextItemSelected(android.view.MenuItem menuItem) {
+        ExpandableListContextMenuInfo info = (ExpandableListContextMenuInfo) menuItem.getMenuInfo();
+        int type = ExpandableListView.getPackedPositionType(info.packedPosition);
+        int groupPosition = ExpandableListView.getPackedPositionGroup(info.packedPosition);
+
+        if (type != ExpandableListView.PACKED_POSITION_TYPE_GROUP) {
+            return super.onContextItemSelected(menuItem);
+        }
+
+        switch (menuItem.getItemId()) {
+        case Id.menu.edit: {
+            mSelectedItem = groupPosition;
+            checkPassPhraseAndEdit();
+            return true;
+        }
+
+        case Id.menu.share: {
+            mSelectedItem = groupPosition;
+
+            long keyId = ((KeyListAdapter) mList.getExpandableListAdapter())
+                    .getGroupId(mSelectedItem);
+            String msg = keyId + "," + Apg.getFingerPrint(keyId);
+
+            new IntentIntegrator(this).shareText(msg);
+        }
+
+        default: {
+            return super.onContextItemSelected(menuItem);
+        }
+        }
+    }
+
+    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition,
+            int childPosition, long id) {
+        mSelectedItem = groupPosition;
+        checkPassPhraseAndEdit();
+        return true;
+    }
+
+    @Override
+    protected Dialog onCreateDialog(int id) {
+        switch (id) {
+        case Id.dialog.pass_phrase: {
+            long keyId = ((KeyListAdapter) mList.getExpandableListAdapter())
+                    .getGroupId(mSelectedItem);
+            return AskForSecretKeyPassPhrase.createDialog(this, keyId, this);
+        }
+
+        default: {
+            return super.onCreateDialog(id);
+        }
+        }
+    }
+
+    public void checkPassPhraseAndEdit() {
+        long keyId = ((KeyListAdapter) mList.getExpandableListAdapter()).getGroupId(mSelectedItem);
+        String passPhrase = Apg.getCachedPassPhrase(keyId);
+        if (passPhrase == null) {
+            showDialog(Id.dialog.pass_phrase);
+        } else {
+            Apg.setEditPassPhrase(passPhrase);
+            editKey();
+        }
+    }
+
+    @Override
+    public void passPhraseCallback(long keyId, String passPhrase) {
+        super.passPhraseCallback(keyId, passPhrase);
+        Apg.setEditPassPhrase(passPhrase);
+        editKey();
+    }
+
+    private void createKey() {
+        Apg.setEditPassPhrase("");
+        Intent intent = new Intent(Apg.Intent.CREATE_KEY);
+        startActivityForResult(intent, Id.message.create_key);
+    }
+
+    private void editKey() {
+        long keyId = ((KeyListAdapter) mList.getExpandableListAdapter()).getGroupId(mSelectedItem);
+        Intent intent = new Intent(Apg.Intent.EDIT_KEY);
+        intent.putExtra(Apg.EXTRA_KEY_ID, keyId);
+        startActivityForResult(intent, Id.message.edit_key);
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+        case Id.message.create_key: // intentionally no break
+        case Id.message.edit_key: {
+            if (resultCode == RESULT_OK) {
+                refreshList();
+            }
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+
+        super.onActivityResult(requestCode, resultCode, data);
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/SelectPublicKeyListActivity.java

@@ -0,0 +1,189 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import java.util.Vector;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.ui.widget.SelectPublicKeyListAdapter;
+
+import com.actionbarsherlock.app.ActionBar;
+import com.actionbarsherlock.view.Menu;
+import com.actionbarsherlock.view.MenuItem;
+
+import android.app.SearchManager;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+import android.widget.ListView;
+import android.widget.TextView;
+
+public class SelectPublicKeyListActivity extends BaseActivity {
+    protected ListView mList;
+    protected SelectPublicKeyListAdapter mListAdapter;
+    protected View mFilterLayout;
+    protected Button mClearFilterButton;
+    protected TextView mFilterInfo;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        final ActionBar actionBar = getSupportActionBar();
+        actionBar.setDisplayShowTitleEnabled(true);
+        actionBar.setDisplayHomeAsUpEnabled(false);
+        actionBar.setHomeButtonEnabled(false);
+
+        setContentView(R.layout.select_public_key);
+
+        setDefaultKeyMode(DEFAULT_KEYS_SEARCH_LOCAL);
+
+        mList = (ListView) findViewById(R.id.list);
+        // needed in Android 1.5, where the XML attribute gets ignored
+        mList.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
+
+        mFilterLayout = findViewById(R.id.layout_filter);
+        mFilterInfo = (TextView) mFilterLayout.findViewById(R.id.filterInfo);
+        mClearFilterButton = (Button) mFilterLayout.findViewById(R.id.btn_clear);
+
+        mClearFilterButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                handleIntent(new Intent());
+            }
+        });
+
+        handleIntent(getIntent());
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        handleIntent(intent);
+    }
+
+    private void handleIntent(Intent intent) {
+        String searchString = null;
+        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
+            searchString = intent.getStringExtra(SearchManager.QUERY);
+            if (searchString != null && searchString.trim().length() == 0) {
+                searchString = null;
+            }
+        }
+
+        long selectedKeyIds[] = null;
+        selectedKeyIds = intent.getLongArrayExtra(Apg.EXTRA_SELECTION);
+
+        if (selectedKeyIds == null) {
+            Vector<Long> vector = new Vector<Long>();
+            for (int i = 0; i < mList.getCount(); ++i) {
+                if (mList.isItemChecked(i)) {
+                    vector.add(mList.getItemIdAtPosition(i));
+                }
+            }
+            selectedKeyIds = new long[vector.size()];
+            for (int i = 0; i < vector.size(); ++i) {
+                selectedKeyIds[i] = vector.get(i);
+            }
+        }
+
+        if (searchString == null) {
+            mFilterLayout.setVisibility(View.GONE);
+        } else {
+            mFilterLayout.setVisibility(View.VISIBLE);
+            mFilterInfo.setText(getString(R.string.filterInfo, searchString));
+        }
+
+        if (mListAdapter != null) {
+            mListAdapter.cleanup();
+        }
+
+        mListAdapter = new SelectPublicKeyListAdapter(this, mList, searchString, selectedKeyIds);
+        mList.setAdapter(mListAdapter);
+
+        if (selectedKeyIds != null) {
+            for (int i = 0; i < mListAdapter.getCount(); ++i) {
+                long keyId = mListAdapter.getItemId(i);
+                for (int j = 0; j < selectedKeyIds.length; ++j) {
+                    if (keyId == selectedKeyIds[j]) {
+                        mList.setItemChecked(i, true);
+                        break;
+                    }
+                }
+            }
+        }
+    }
+
+    private void cancelClicked() {
+        setResult(RESULT_CANCELED, null);
+        finish();
+    }
+
+    private void okClicked() {
+        Intent data = new Intent();
+        Vector<Long> keys = new Vector<Long>();
+        Vector<String> userIds = new Vector<String>();
+        for (int i = 0; i < mList.getCount(); ++i) {
+            if (mList.isItemChecked(i)) {
+                keys.add(mList.getItemIdAtPosition(i));
+                userIds.add((String) mList.getItemAtPosition(i));
+            }
+        }
+        long selectedKeyIds[] = new long[keys.size()];
+        for (int i = 0; i < keys.size(); ++i) {
+            selectedKeyIds[i] = keys.get(i);
+        }
+        String userIdArray[] = new String[0];
+        data.putExtra(Apg.EXTRA_SELECTION, selectedKeyIds);
+        data.putExtra(Apg.EXTRA_USER_IDS, userIds.toArray(userIdArray));
+        setResult(RESULT_OK, data);
+        finish();
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        menu.add(0, Id.menu.option.search, 0, R.string.menu_search).setIcon(
+                android.R.drawable.ic_menu_search);
+        menu.add(1, Id.menu.option.cancel, 0, R.string.btn_doNotSave).setShowAsAction(
+                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        menu.add(1, Id.menu.option.okay, 1, R.string.btn_okay).setShowAsAction(
+                MenuItem.SHOW_AS_ACTION_ALWAYS | MenuItem.SHOW_AS_ACTION_WITH_TEXT);
+        return true;
+    }
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case Id.menu.option.okay:
+            okClicked();
+            return true;
+
+        case Id.menu.option.cancel:
+            cancelClicked();
+            return true;
+
+        default:
+            break;
+
+        }
+        return false;
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/SelectSecretKeyListActivity.java

@@ -0,0 +1,121 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.ui.widget.SelectSecretKeyListAdapter;
+
+import com.actionbarsherlock.app.ActionBar;
+import com.actionbarsherlock.view.Menu;
+
+import android.app.SearchManager;
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.AdapterView;
+import android.widget.AdapterView.OnItemClickListener;
+import android.widget.Button;
+import android.widget.ListView;
+import android.widget.TextView;
+
+public class SelectSecretKeyListActivity extends BaseActivity {
+    protected ListView mList;
+    protected SelectSecretKeyListAdapter mListAdapter;
+    protected View mFilterLayout;
+    protected Button mClearFilterButton;
+    protected TextView mFilterInfo;
+
+    protected long mSelectedKeyId = 0;
+
+    @Override
+    public void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        final ActionBar actionBar = getSupportActionBar();
+        actionBar.setDisplayShowTitleEnabled(true);
+        actionBar.setDisplayHomeAsUpEnabled(false);
+        actionBar.setHomeButtonEnabled(false);
+
+        setContentView(R.layout.select_secret_key);
+
+        setDefaultKeyMode(DEFAULT_KEYS_SEARCH_LOCAL);
+
+        mList = (ListView) findViewById(R.id.list);
+
+        mList.setOnItemClickListener(new OnItemClickListener() {
+            public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
+                Intent data = new Intent();
+                data.putExtra(Apg.EXTRA_KEY_ID, id);
+                data.putExtra(Apg.EXTRA_USER_ID, (String) mList.getItemAtPosition(position));
+                setResult(RESULT_OK, data);
+                finish();
+            }
+        });
+
+        mFilterLayout = findViewById(R.id.layout_filter);
+        mFilterInfo = (TextView) mFilterLayout.findViewById(R.id.filterInfo);
+        mClearFilterButton = (Button) mFilterLayout.findViewById(R.id.btn_clear);
+
+        mClearFilterButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                handleIntent(new Intent());
+            }
+        });
+
+        handleIntent(getIntent());
+    }
+
+    @Override
+    protected void onNewIntent(Intent intent) {
+        super.onNewIntent(intent);
+        handleIntent(intent);
+    }
+
+    private void handleIntent(Intent intent) {
+        String searchString = null;
+        if (Intent.ACTION_SEARCH.equals(intent.getAction())) {
+            searchString = intent.getStringExtra(SearchManager.QUERY);
+            if (searchString != null && searchString.trim().length() == 0) {
+                searchString = null;
+            }
+        }
+
+        if (searchString == null) {
+            mFilterLayout.setVisibility(View.GONE);
+        } else {
+            mFilterLayout.setVisibility(View.VISIBLE);
+            mFilterInfo.setText(getString(R.string.filterInfo, searchString));
+        }
+
+        if (mListAdapter != null) {
+            mListAdapter.cleanup();
+        }
+
+        mListAdapter = new SelectSecretKeyListAdapter(this, mList, searchString);
+        mList.setAdapter(mListAdapter);
+    }
+
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        menu.add(0, Id.menu.option.search, 0, R.string.menu_search).setIcon(
+                android.R.drawable.ic_menu_search);
+        return true;
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/SignKeyActivity.java

@@ -0,0 +1,327 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui;
+
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.security.SignatureException;
+import java.util.Iterator;
+
+import org.spongycastle.jce.provider.BouncyCastleProvider;
+import org.spongycastle.openpgp.PGPException;
+import org.spongycastle.openpgp.PGPPrivateKey;
+import org.spongycastle.openpgp.PGPPublicKey;
+import org.spongycastle.openpgp.PGPPublicKeyRing;
+import org.spongycastle.openpgp.PGPSecretKey;
+import org.spongycastle.openpgp.PGPSignature;
+import org.spongycastle.openpgp.PGPSignatureGenerator;
+import org.spongycastle.openpgp.PGPSignatureSubpacketGenerator;
+import org.spongycastle.openpgp.PGPSignatureSubpacketVector;
+import org.spongycastle.openpgp.PGPUtil;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Constants;
+import org.thialfihar.android.apg.HkpKeyServer;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.R;
+
+import com.actionbarsherlock.view.MenuItem;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Message;
+import android.util.Log;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.CompoundButton.OnCheckedChangeListener;
+import android.widget.Spinner;
+import android.widget.Toast;
+
+/**
+ * gpg --sign-key
+ * 
+ * signs the specified public key with the specified secret master key
+ */
+public class SignKeyActivity extends BaseActivity {
+    private static final String TAG = "SignKeyActivity";
+
+    private long pubKeyId = 0;
+    private long masterKeyId = 0;
+
+    @Override
+    public boolean onOptionsItemSelected(MenuItem item) {
+        switch (item.getItemId()) {
+
+        case android.R.id.home:
+            startActivity(new Intent(this, PublicKeyListActivity.class));
+            return true;
+
+        default:
+            break;
+
+        }
+        return false;
+    }
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        // check we havent already signed it
+        setContentView(R.layout.sign_key_layout);
+
+        final Spinner keyServer = (Spinner) findViewById(R.id.keyServer);
+        ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
+                android.R.layout.simple_spinner_item, mPreferences.getKeyServers());
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        keyServer.setAdapter(adapter);
+
+        final CheckBox sendKey = (CheckBox) findViewById(R.id.sendKey);
+        if (!sendKey.isChecked()) {
+            keyServer.setEnabled(false);
+        } else {
+            keyServer.setEnabled(true);
+        }
+
+        sendKey.setOnCheckedChangeListener(new OnCheckedChangeListener() {
+
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+                if (!isChecked) {
+                    keyServer.setEnabled(false);
+                } else {
+                    keyServer.setEnabled(true);
+                }
+            }
+        });
+
+        Button sign = (Button) findViewById(R.id.sign);
+        sign.setEnabled(false); // disabled until the user selects a key to sign with
+        sign.setOnClickListener(new OnClickListener() {
+
+            @Override
+            public void onClick(View v) {
+                if (pubKeyId != 0) {
+                    initiateSigning();
+                }
+            }
+        });
+
+        pubKeyId = getIntent().getLongExtra(Apg.EXTRA_KEY_ID, 0);
+        if (pubKeyId == 0) {
+            finish(); // nothing to do if we dont know what key to sign
+        } else {
+            // kick off the SecretKey selection activity so the user chooses which key to sign with
+            // first
+            Intent intent = new Intent(this, SelectSecretKeyListActivity.class);
+            startActivityForResult(intent, Id.request.secret_keys);
+        }
+    }
+
+    /**
+     * handles the UI bits of the signing process on the UI thread
+     */
+    private void initiateSigning() {
+        PGPPublicKeyRing pubring = Apg.getPublicKeyRing(pubKeyId);
+        if (pubring != null) {
+            // if we have already signed this key, dont bother doing it again
+            boolean alreadySigned = false;
+
+            @SuppressWarnings("unchecked")
+            Iterator<PGPSignature> itr = pubring.getPublicKey(pubKeyId).getSignatures();
+            while (itr.hasNext()) {
+                PGPSignature sig = itr.next();
+                if (sig.getKeyID() == masterKeyId) {
+                    alreadySigned = true;
+                    break;
+                }
+            }
+
+            if (!alreadySigned) {
+                /*
+                 * get the user's passphrase for this key (if required)
+                 */
+                String passphrase = Apg.getCachedPassPhrase(masterKeyId);
+                if (passphrase == null) {
+                    showDialog(Id.dialog.pass_phrase);
+                    return; // bail out; need to wait until the user has entered the passphrase
+                            // before trying again
+                } else {
+                    startSigning();
+                }
+            } else {
+                final Bundle status = new Bundle();
+                Message msg = new Message();
+
+                status.putString(Apg.EXTRA_ERROR, "Key has already been signed");
+
+                status.putInt(Constants.extras.STATUS, Id.message.done);
+
+                msg.setData(status);
+                sendMessage(msg);
+
+                setResult(Id.return_value.error);
+                finish();
+            }
+        }
+    }
+
+    @Override
+    public long getSecretKeyId() {
+        return masterKeyId;
+    }
+
+    @Override
+    public void passPhraseCallback(long keyId, String passPhrase) {
+        super.passPhraseCallback(keyId, passPhrase);
+        startSigning();
+    }
+
+    /**
+     * kicks off the actual signing process on a background thread
+     */
+    private void startSigning() {
+        showDialog(Id.dialog.signing);
+        startThread();
+    }
+
+    @Override
+    public void run() {
+        final Bundle status = new Bundle();
+        Message msg = new Message();
+
+        try {
+            String passphrase = Apg.getCachedPassPhrase(masterKeyId);
+            if (passphrase == null || passphrase.length() <= 0) {
+                status.putString(Apg.EXTRA_ERROR, "Unable to obtain passphrase");
+            } else {
+                PGPPublicKeyRing pubring = Apg.getPublicKeyRing(pubKeyId);
+
+                /*
+                 * sign the incoming key
+                 */
+                PGPSecretKey secretKey = Apg.getSecretKey(masterKeyId);
+                PGPPrivateKey signingKey = secretKey.extractPrivateKey(passphrase.toCharArray(),
+                        BouncyCastleProvider.PROVIDER_NAME);
+                PGPSignatureGenerator sGen = new PGPSignatureGenerator(secretKey.getPublicKey()
+                        .getAlgorithm(), PGPUtil.SHA256, BouncyCastleProvider.PROVIDER_NAME);
+                sGen.initSign(PGPSignature.DIRECT_KEY, signingKey);
+
+                PGPSignatureSubpacketGenerator spGen = new PGPSignatureSubpacketGenerator();
+
+                PGPSignatureSubpacketVector packetVector = spGen.generate();
+                sGen.setHashedSubpackets(packetVector);
+
+                PGPPublicKey signedKey = PGPPublicKey.addCertification(
+                        pubring.getPublicKey(pubKeyId), sGen.generate());
+                pubring = PGPPublicKeyRing.insertPublicKey(pubring, signedKey);
+
+                // check if we need to send the key to the server or not
+                CheckBox sendKey = (CheckBox) findViewById(R.id.sendKey);
+                if (sendKey.isChecked()) {
+                    Spinner keyServer = (Spinner) findViewById(R.id.keyServer);
+                    HkpKeyServer server = new HkpKeyServer((String) keyServer.getSelectedItem());
+
+                    /*
+                     * upload the newly signed key to the key server
+                     */
+
+                    Apg.uploadKeyRingToServer(server, pubring);
+                }
+
+                // store the signed key in our local cache
+                int retval = Apg.storeKeyRingInCache(pubring);
+                if (retval != Id.return_value.ok && retval != Id.return_value.updated) {
+                    status.putString(Apg.EXTRA_ERROR, "Failed to store signed key in local cache");
+                }
+            }
+        } catch (PGPException e) {
+            Log.e(TAG, "Failed to sign key", e);
+            status.putString(Apg.EXTRA_ERROR, "Failed to sign key");
+            status.putInt(Constants.extras.STATUS, Id.message.done);
+            return;
+        } catch (NoSuchAlgorithmException e) {
+            Log.e(TAG, "Failed to sign key", e);
+            status.putString(Apg.EXTRA_ERROR, "Failed to sign key");
+            status.putInt(Constants.extras.STATUS, Id.message.done);
+            return;
+        } catch (NoSuchProviderException e) {
+            Log.e(TAG, "Failed to sign key", e);
+            status.putString(Apg.EXTRA_ERROR, "Failed to sign key");
+            status.putInt(Constants.extras.STATUS, Id.message.done);
+            return;
+        } catch (SignatureException e) {
+            Log.e(TAG, "Failed to sign key", e);
+            status.putString(Apg.EXTRA_ERROR, "Failed to sign key");
+            status.putInt(Constants.extras.STATUS, Id.message.done);
+            return;
+        }
+
+        status.putInt(Constants.extras.STATUS, Id.message.done);
+
+        msg.setData(status);
+        sendMessage(msg);
+
+        if (status.containsKey(Apg.EXTRA_ERROR)) {
+            setResult(Id.return_value.error);
+        } else {
+            setResult(Id.return_value.ok);
+        }
+
+        finish();
+    }
+
+    @Override
+    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
+        switch (requestCode) {
+        case Id.request.secret_keys: {
+            if (resultCode == RESULT_OK) {
+                masterKeyId = data.getLongExtra(Apg.EXTRA_KEY_ID, 0);
+
+                // re-enable the sign button so the user can initiate the sign process
+                Button sign = (Button) findViewById(R.id.sign);
+                sign.setEnabled(true);
+            }
+
+            break;
+        }
+
+        default: {
+            super.onActivityResult(requestCode, resultCode, data);
+        }
+        }
+    }
+
+    @Override
+    public void doneCallback(Message msg) {
+        super.doneCallback(msg);
+
+        removeDialog(Id.dialog.signing);
+
+        Bundle data = msg.getData();
+        String error = data.getString(Apg.EXTRA_ERROR);
+        if (error != null) {
+            Toast.makeText(this, getString(R.string.errorMessage, error), Toast.LENGTH_SHORT)
+                    .show();
+            return;
+        }
+
+        Toast.makeText(this, R.string.keySignSuccess, Toast.LENGTH_SHORT).show();
+        finish();
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/widget/DashboardLayout.java

@@ -0,0 +1,186 @@
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.widget;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.ViewGroup;
+
+/**
+ * Custom layout that arranges children in a grid-like manner, optimizing for even horizontal and
+ * vertical whitespace.
+ */
+public class DashboardLayout extends ViewGroup {
+    private static final int UNEVEN_GRID_PENALTY_MULTIPLIER = 10;
+
+    private int mMaxChildWidth = 0;
+    private int mMaxChildHeight = 0;
+
+    public DashboardLayout(Context context) {
+        super(context, null);
+    }
+
+    public DashboardLayout(Context context, AttributeSet attrs) {
+        super(context, attrs, 0);
+    }
+
+    public DashboardLayout(Context context, AttributeSet attrs, int defStyle) {
+        super(context, attrs, defStyle);
+    }
+
+    @Override
+    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
+        mMaxChildWidth = 0;
+        mMaxChildHeight = 0;
+
+        // Measure once to find the maximum child size.
+
+        int childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(
+                MeasureSpec.getSize(widthMeasureSpec), MeasureSpec.AT_MOST);
+        int childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(
+                MeasureSpec.getSize(heightMeasureSpec), MeasureSpec.AT_MOST);
+
+        final int count = getChildCount();
+        for (int i = 0; i < count; i++) {
+            final View child = getChildAt(i);
+            if (child.getVisibility() == GONE) {
+                continue;
+            }
+
+            child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
+
+            mMaxChildWidth = Math.max(mMaxChildWidth, child.getMeasuredWidth());
+            mMaxChildHeight = Math.max(mMaxChildHeight, child.getMeasuredHeight());
+        }
+
+        // Measure again for each child to be exactly the same size.
+
+        childWidthMeasureSpec = MeasureSpec.makeMeasureSpec(mMaxChildWidth, MeasureSpec.EXACTLY);
+        childHeightMeasureSpec = MeasureSpec.makeMeasureSpec(mMaxChildHeight, MeasureSpec.EXACTLY);
+
+        for (int i = 0; i < count; i++) {
+            final View child = getChildAt(i);
+            if (child.getVisibility() == GONE) {
+                continue;
+            }
+
+            child.measure(childWidthMeasureSpec, childHeightMeasureSpec);
+        }
+
+        setMeasuredDimension(resolveSize(mMaxChildWidth, widthMeasureSpec),
+                resolveSize(mMaxChildHeight, heightMeasureSpec));
+    }
+
+    @Override
+    protected void onLayout(boolean changed, int l, int t, int r, int b) {
+        int width = r - l;
+        int height = b - t;
+
+        final int count = getChildCount();
+
+        // Calculate the number of visible children.
+        int visibleCount = 0;
+        for (int i = 0; i < count; i++) {
+            final View child = getChildAt(i);
+            if (child.getVisibility() == GONE) {
+                continue;
+            }
+            ++visibleCount;
+        }
+
+        if (visibleCount == 0) {
+            return;
+        }
+
+        // Calculate what number of rows and columns will optimize for even horizontal and
+        // vertical whitespace between items. Start with a 1 x N grid, then try 2 x N, and so on.
+        int bestSpaceDifference = Integer.MAX_VALUE;
+        int spaceDifference;
+
+        // Horizontal and vertical space between items
+        int hSpace = 0;
+        int vSpace = 0;
+
+        int cols = 1;
+        int rows;
+
+        while (true) {
+            rows = (visibleCount - 1) / cols + 1;
+
+            hSpace = ((width - mMaxChildWidth * cols) / (cols + 1));
+            vSpace = ((height - mMaxChildHeight * rows) / (rows + 1));
+
+            spaceDifference = Math.abs(vSpace - hSpace);
+            if (rows * cols != visibleCount) {
+                spaceDifference *= UNEVEN_GRID_PENALTY_MULTIPLIER;
+            } else if (rows * mMaxChildHeight > height || cols * mMaxChildWidth > width) {
+                spaceDifference *= UNEVEN_GRID_PENALTY_MULTIPLIER;
+            }
+
+            if (spaceDifference < bestSpaceDifference) {
+                // Found a better whitespace squareness/ratio
+                bestSpaceDifference = spaceDifference;
+
+                // If we found a better whitespace squareness and there's only 1 row, this is
+                // the best we can do.
+                if (rows == 1) {
+                    break;
+                }
+            } else {
+                // This is a worse whitespace ratio, use the previous value of cols and exit.
+                --cols;
+                rows = (visibleCount - 1) / cols + 1;
+                hSpace = ((width - mMaxChildWidth * cols) / (cols + 1));
+                vSpace = ((height - mMaxChildHeight * rows) / (rows + 1));
+                break;
+            }
+
+            ++cols;
+        }
+
+        // Lay out children based on calculated best-fit number of rows and cols.
+
+        // If we chose a layout that has negative horizontal or vertical space, force it to zero.
+        hSpace = Math.max(0, hSpace);
+        vSpace = Math.max(0, vSpace);
+
+        // Re-use width/height variables to be child width/height.
+        width = (width - hSpace * (cols + 1)) / cols;
+        height = (height - vSpace * (rows + 1)) / rows;
+
+        int left, top;
+        int col, row;
+        int visibleIndex = 0;
+        for (int i = 0; i < count; i++) {
+            final View child = getChildAt(i);
+            if (child.getVisibility() == GONE) {
+                continue;
+            }
+
+            row = visibleIndex / cols;
+            col = visibleIndex % cols;
+
+            left = hSpace * (col + 1) + width * col;
+            top = vSpace * (row + 1) + height * row;
+
+            child.layout(left, top, (hSpace == 0 && col == cols - 1) ? r : (left + width),
+                    (vSpace == 0 && row == rows - 1) ? b : (top + height));
+            ++visibleIndex;
+        }
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/widget/Editor.java

@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.widget;
+
+public interface Editor {
+    public interface EditorListener {
+        public void onDeleted(Editor editor);
+    }
+
+    public void setEditorListener(EditorListener listener);
+}

org_apg/src/org/thialfihar/android/apg/ui/widget/IntegerListPreference.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright 2010 Google Inc.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License"); you may not
+ * use this file except in compliance with the License. You may obtain a copy of
+ * the License at
+ * 
+ * http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations under
+ * the License.
+ */
+
+package org.thialfihar.android.apg.ui.widget;
+
+import android.content.Context;
+import android.preference.ListPreference;
+import android.util.AttributeSet;
+
+/**
+ * A list preference which persists its values as integers instead of strings.
+ * Code reading the values should use
+ * {@link android.content.SharedPreferences#getInt}.
+ * When using XML-declared arrays for entry values, the arrays should be regular
+ * string arrays containing valid integer values.
+ *
+ * @author Rodrigo Damazio
+ */
+public class IntegerListPreference extends ListPreference {
+
+  public IntegerListPreference(Context context) {
+    super(context);
+
+    verifyEntryValues(null);
+  }
+
+  public IntegerListPreference(Context context, AttributeSet attrs) {
+    super(context, attrs);
+
+    verifyEntryValues(null);
+  }
+
+  @Override
+  public void setEntryValues(CharSequence[] entryValues) {
+    CharSequence[] oldValues = getEntryValues();
+    super.setEntryValues(entryValues);
+    verifyEntryValues(oldValues);
+  }
+
+  @Override
+  public void setEntryValues(int entryValuesResId) {
+    CharSequence[] oldValues = getEntryValues();
+    super.setEntryValues(entryValuesResId);
+    verifyEntryValues(oldValues);
+  }
+
+  @Override
+  protected String getPersistedString(String defaultReturnValue) {
+    // During initial load, there's no known default value
+    int defaultIntegerValue = Integer.MIN_VALUE;
+    if (defaultReturnValue != null) {
+      defaultIntegerValue = Integer.parseInt(defaultReturnValue);
+    }
+
+    // When the list preference asks us to read a string, instead read an
+    // integer.
+    int value = getPersistedInt(defaultIntegerValue);
+    return Integer.toString(value);
+  }
+
+  @Override
+  protected boolean persistString(String value) {
+    // When asked to save a string, instead save an integer
+    return persistInt(Integer.parseInt(value));
+  }
+
+  private void verifyEntryValues(CharSequence[] oldValues) {
+    CharSequence[] entryValues = getEntryValues();
+    if (entryValues == null) {
+      return;
+    }
+
+    for (CharSequence entryValue : entryValues) {
+      try {
+        Integer.parseInt(entryValue.toString());
+      } catch (NumberFormatException nfe) {
+        super.setEntryValues(oldValues);
+        throw nfe;
+      }
+    }
+  }
+}

org_apg/src/org/thialfihar/android/apg/ui/widget/KeyEditor.java

@@ -0,0 +1,235 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.widget;
+
+import org.spongycastle.openpgp.PGPPublicKey;
+import org.spongycastle.openpgp.PGPSecretKey;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.util.Choice;
+import org.thialfihar.android.apg.R;
+
+import android.app.DatePickerDialog;
+import android.app.Dialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.Button;
+import android.widget.DatePicker;
+import android.widget.ImageButton;
+import android.widget.LinearLayout;
+import android.widget.Spinner;
+import android.widget.TextView;
+
+import java.text.DateFormat;
+import java.util.Calendar;
+import java.util.Date;
+import java.util.GregorianCalendar;
+import java.util.Vector;
+
+public class KeyEditor extends LinearLayout implements Editor, OnClickListener {
+    private PGPSecretKey mKey;
+
+    private EditorListener mEditorListener = null;
+
+    private boolean mIsMasterKey;
+    ImageButton mDeleteButton;
+    TextView mAlgorithm;
+    TextView mKeyId;
+    Spinner mUsage;
+    TextView mCreationDate;
+    Button mExpiryDateButton;
+    GregorianCalendar mExpiryDate;
+
+    private DatePickerDialog.OnDateSetListener mExpiryDateSetListener = new DatePickerDialog.OnDateSetListener() {
+        public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) {
+            GregorianCalendar date = new GregorianCalendar(year, monthOfYear, dayOfMonth);
+            setExpiryDate(date);
+        }
+    };
+
+    public KeyEditor(Context context) {
+        super(context);
+    }
+
+    public KeyEditor(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        setDrawingCacheEnabled(true);
+        setAlwaysDrawnWithCacheEnabled(true);
+
+        mAlgorithm = (TextView) findViewById(R.id.algorithm);
+        mKeyId = (TextView) findViewById(R.id.keyId);
+        mCreationDate = (TextView) findViewById(R.id.creation);
+        mExpiryDateButton = (Button) findViewById(R.id.expiry);
+        mUsage = (Spinner) findViewById(R.id.usage);
+        Choice choices[] = {
+                new Choice(Id.choice.usage.sign_only, getResources().getString(
+                        R.string.choice_signOnly)),
+                new Choice(Id.choice.usage.encrypt_only, getResources().getString(
+                        R.string.choice_encryptOnly)),
+                new Choice(Id.choice.usage.sign_and_encrypt, getResources().getString(
+                        R.string.choice_signAndEncrypt)), };
+        ArrayAdapter<Choice> adapter = new ArrayAdapter<Choice>(getContext(),
+                android.R.layout.simple_spinner_item, choices);
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        mUsage.setAdapter(adapter);
+
+        mDeleteButton = (ImageButton) findViewById(R.id.delete);
+        mDeleteButton.setOnClickListener(this);
+
+        setExpiryDate(null);
+
+        mExpiryDateButton.setOnClickListener(new OnClickListener() {
+            public void onClick(View v) {
+                GregorianCalendar date = mExpiryDate;
+                if (date == null) {
+                    date = new GregorianCalendar();
+                }
+
+                DatePickerDialog dialog = new DatePickerDialog(getContext(),
+                        mExpiryDateSetListener, date.get(Calendar.YEAR), date.get(Calendar.MONTH),
+                        date.get(Calendar.DAY_OF_MONTH));
+                dialog.setCancelable(true);
+                dialog.setButton(Dialog.BUTTON_NEGATIVE, getContext()
+                        .getString(R.string.btn_noDate), new DialogInterface.OnClickListener() {
+                    public void onClick(DialogInterface dialog, int which) {
+                        setExpiryDate(null);
+                    }
+                });
+                dialog.show();
+            }
+        });
+
+        super.onFinishInflate();
+    }
+
+    public void setValue(PGPSecretKey key, boolean isMasterKey, int usage) {
+        mKey = key;
+
+        mIsMasterKey = isMasterKey;
+        if (mIsMasterKey) {
+            mDeleteButton.setVisibility(View.INVISIBLE);
+        }
+
+        mAlgorithm.setText(Apg.getAlgorithmInfo(key));
+        String keyId1Str = Apg.getSmallFingerPrint(key.getKeyID());
+        String keyId2Str = Apg.getSmallFingerPrint(key.getKeyID() >> 32);
+        mKeyId.setText(keyId1Str + " " + keyId2Str);
+
+        Vector<Choice> choices = new Vector<Choice>();
+        boolean isElGamalKey = (key.getPublicKey().getAlgorithm() == PGPPublicKey.ELGAMAL_ENCRYPT);
+        if (!isElGamalKey) {
+            choices.add(new Choice(Id.choice.usage.sign_only, getResources().getString(
+                    R.string.choice_signOnly)));
+        }
+        if (!mIsMasterKey) {
+            choices.add(new Choice(Id.choice.usage.encrypt_only, getResources().getString(
+                    R.string.choice_encryptOnly)));
+        }
+        if (!isElGamalKey) {
+            choices.add(new Choice(Id.choice.usage.sign_and_encrypt, getResources().getString(
+                    R.string.choice_signAndEncrypt)));
+        }
+
+        ArrayAdapter<Choice> adapter = new ArrayAdapter<Choice>(getContext(),
+                android.R.layout.simple_spinner_item, choices);
+        adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+        mUsage.setAdapter(adapter);
+
+        // Set value in choice dropdown to key
+        int selectId = 0;
+        if (Apg.isEncryptionKey(key)) {
+            if (Apg.isSigningKey(key)) {
+                selectId = Id.choice.usage.sign_and_encrypt;
+            } else {
+                selectId = Id.choice.usage.encrypt_only;
+            }
+        } else {
+            // set usage if it is predefined
+            if (usage != -1) {
+                selectId = usage;
+            } else {
+                selectId = Id.choice.usage.sign_only;
+            }
+
+        }
+
+        for (int i = 0; i < choices.size(); ++i) {
+            if (choices.get(i).getId() == selectId) {
+                mUsage.setSelection(i);
+                break;
+            }
+        }
+
+        GregorianCalendar cal = new GregorianCalendar();
+        cal.setTime(Apg.getCreationDate(key));
+        mCreationDate.setText(DateFormat.getDateInstance().format(cal.getTime()));
+        cal = new GregorianCalendar();
+        Date date = Apg.getExpiryDate(key);
+        if (date == null) {
+            setExpiryDate(null);
+        } else {
+            cal.setTime(Apg.getExpiryDate(key));
+            setExpiryDate(cal);
+        }
+
+    }
+
+    public PGPSecretKey getValue() {
+        return mKey;
+    }
+
+    public void onClick(View v) {
+        final ViewGroup parent = (ViewGroup) getParent();
+        if (v == mDeleteButton) {
+            parent.removeView(this);
+            if (mEditorListener != null) {
+                mEditorListener.onDeleted(this);
+            }
+        }
+    }
+
+    public void setEditorListener(EditorListener listener) {
+        mEditorListener = listener;
+    }
+
+    private void setExpiryDate(GregorianCalendar date) {
+        mExpiryDate = date;
+        if (date == null) {
+            mExpiryDateButton.setText(R.string.none);
+        } else {
+            mExpiryDateButton.setText(DateFormat.getDateInstance().format(date.getTime()));
+        }
+    }
+
+    public GregorianCalendar getExpiryDate() {
+        return mExpiryDate;
+    }
+
+    public int getUsage() {
+        return ((Choice) mUsage.getSelectedItem()).getId();
+    }
+
+}

org_apg/src/org/thialfihar/android/apg/ui/widget/KeyServerEditor.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.widget;
+
+import org.thialfihar.android.apg.R;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.ImageButton;
+import android.widget.LinearLayout;
+import android.widget.TextView;
+
+public class KeyServerEditor extends LinearLayout implements Editor, OnClickListener {
+    private EditorListener mEditorListener = null;
+
+    ImageButton mDeleteButton;
+    TextView mServer;
+
+    public KeyServerEditor(Context context) {
+        super(context);
+    }
+
+    public KeyServerEditor(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        setDrawingCacheEnabled(true);
+        setAlwaysDrawnWithCacheEnabled(true);
+
+        mServer = (TextView) findViewById(R.id.server);
+
+        mDeleteButton = (ImageButton) findViewById(R.id.delete);
+        mDeleteButton.setOnClickListener(this);
+
+        super.onFinishInflate();
+    }
+
+    public void setValue(String value) {
+        mServer.setText(value);
+    }
+
+    public String getValue() {
+        return mServer.getText().toString().trim();
+    }
+
+    public void onClick(View v) {
+        final ViewGroup parent = (ViewGroup)getParent();
+        if (v == mDeleteButton) {
+            parent.removeView(this);
+            if (mEditorListener != null) {
+                mEditorListener.onDeleted(this);
+            }
+        }
+    }
+
+    public void setEditorListener(EditorListener listener) {
+        mEditorListener = listener;
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/widget/SectionView.java

@@ -0,0 +1,331 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.widget;
+
+import org.spongycastle.openpgp.PGPException;
+import org.spongycastle.openpgp.PGPSecretKey;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.ui.widget.Editor.EditorListener;
+import org.thialfihar.android.apg.util.Choice;
+import org.thialfihar.android.apg.R;
+
+import android.app.AlertDialog;
+import android.app.ProgressDialog;
+import android.content.Context;
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.util.AttributeSet;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.ArrayAdapter;
+import android.widget.CheckBox;
+import android.widget.CompoundButton;
+import android.widget.CompoundButton.OnCheckedChangeListener;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.Spinner;
+import android.widget.TableRow;
+import android.widget.TextView;
+import android.widget.Toast;
+
+import java.security.InvalidAlgorithmParameterException;
+import java.security.InvalidParameterException;
+import java.security.NoSuchAlgorithmException;
+import java.security.NoSuchProviderException;
+import java.util.Vector;
+
+public class SectionView extends LinearLayout implements OnClickListener, EditorListener, Runnable {
+    private LayoutInflater mInflater;
+    private View mAdd;
+    private ViewGroup mEditors;
+    private TextView mTitle;
+    private int mType = 0;
+
+    private Choice mNewKeyAlgorithmChoice;
+    private int mNewKeySize;
+
+    volatile private PGPSecretKey mNewKey;
+    private ProgressDialog mProgressDialog;
+    private Thread mRunningThread = null;
+
+    private Handler mHandler = new Handler() {
+        @Override
+        public void handleMessage(Message msg) {
+            Bundle data = msg.getData();
+            if (data != null) {
+                boolean closeProgressDialog = data.getBoolean("closeProgressDialog");
+                if (closeProgressDialog) {
+                    if (mProgressDialog != null) {
+                        mProgressDialog.dismiss();
+                        mProgressDialog = null;
+                    }
+                }
+
+                String error = data.getString(Apg.EXTRA_ERROR);
+                if (error != null) {
+                    Toast.makeText(getContext(),
+                            getContext().getString(R.string.errorMessage, error),
+                            Toast.LENGTH_SHORT).show();
+                }
+
+                boolean gotNewKey = data.getBoolean("gotNewKey");
+                if (gotNewKey) {
+                    KeyEditor view = (KeyEditor) mInflater.inflate(R.layout.edit_key_key_item,
+                            mEditors, false);
+                    view.setEditorListener(SectionView.this);
+                    boolean isMasterKey = (mEditors.getChildCount() == 0);
+                    view.setValue(mNewKey, isMasterKey, -1);
+                    mEditors.addView(view);
+                    SectionView.this.updateEditorsVisible();
+                }
+            }
+        }
+    };
+
+    public SectionView(Context context) {
+        super(context);
+    }
+
+    public SectionView(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public ViewGroup getEditors() {
+        return mEditors;
+    }
+
+    public void setType(int type) {
+        mType = type;
+        switch (type) {
+        case Id.type.user_id: {
+            mTitle.setText(R.string.section_userIds);
+            break;
+        }
+
+        case Id.type.key: {
+            mTitle.setText(R.string.section_keys);
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    protected void onFinishInflate() {
+        mInflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
+
+        setDrawingCacheEnabled(true);
+        setAlwaysDrawnWithCacheEnabled(true);
+
+        mAdd = findViewById(R.id.header);
+        mAdd.setOnClickListener(this);
+
+        mEditors = (ViewGroup) findViewById(R.id.editors);
+        mTitle = (TextView) findViewById(R.id.title);
+
+        updateEditorsVisible();
+        super.onFinishInflate();
+    }
+
+    /** {@inheritDoc} */
+    public void onDeleted(Editor editor) {
+        this.updateEditorsVisible();
+    }
+
+    protected void updateEditorsVisible() {
+        final boolean hasChildren = mEditors.getChildCount() > 0;
+        mEditors.setVisibility(hasChildren ? View.VISIBLE : View.GONE);
+    }
+
+    /** {@inheritDoc} */
+    public void onClick(View v) {
+        switch (mType) {
+        case Id.type.user_id: {
+            UserIdEditor view = (UserIdEditor) mInflater.inflate(R.layout.edit_key_user_id_item,
+                    mEditors, false);
+            view.setEditorListener(this);
+            if (mEditors.getChildCount() == 0) {
+                view.setIsMainUserId(true);
+            }
+            mEditors.addView(view);
+            break;
+        }
+
+        case Id.type.key: {
+            AlertDialog.Builder dialog = new AlertDialog.Builder(getContext());
+
+            View view = mInflater.inflate(R.layout.create_key, null);
+            dialog.setView(view);
+            dialog.setTitle(R.string.title_createKey);
+
+            boolean wouldBeMasterKey = (mEditors.getChildCount() == 0);
+
+            final Spinner algorithm = (Spinner) view.findViewById(R.id.create_key_algorithm);
+            Vector<Choice> choices = new Vector<Choice>();
+            choices.add(new Choice(Id.choice.algorithm.dsa, getResources().getString(R.string.dsa)));
+            if (!wouldBeMasterKey) {
+                choices.add(new Choice(Id.choice.algorithm.elgamal, getResources().getString(
+                        R.string.elgamal)));
+            }
+
+            choices.add(new Choice(Id.choice.algorithm.rsa, getResources().getString(R.string.rsa)));
+
+            ArrayAdapter<Choice> adapter = new ArrayAdapter<Choice>(getContext(),
+                    android.R.layout.simple_spinner_item, choices);
+            adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
+            algorithm.setAdapter(adapter);
+            // make RSA the default
+            for (int i = 0; i < choices.size(); ++i) {
+                if (choices.get(i).getId() == Id.choice.algorithm.rsa) {
+                    algorithm.setSelection(i);
+                    break;
+                }
+            }
+
+            final EditText keySize = (EditText) view.findViewById(R.id.create_key_size);
+
+            dialog.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
+                public void onClick(DialogInterface di, int id) {
+                    di.dismiss();
+                    try {
+                        mNewKeySize = Integer.parseInt("" + keySize.getText());
+                    } catch (NumberFormatException e) {
+                        mNewKeySize = 0;
+                    }
+
+                    mNewKeyAlgorithmChoice = (Choice) algorithm.getSelectedItem();
+                    createKey();
+                }
+            });
+
+            dialog.setCancelable(true);
+            dialog.setNegativeButton(android.R.string.cancel,
+                    new DialogInterface.OnClickListener() {
+                        public void onClick(DialogInterface di, int id) {
+                            di.dismiss();
+                        }
+                    });
+
+            dialog.create().show();
+            break;
+        }
+
+        default: {
+            break;
+        }
+        }
+        this.updateEditorsVisible();
+    }
+
+    public void setUserIds(Vector<String> list) {
+        if (mType != Id.type.user_id) {
+            return;
+        }
+
+        mEditors.removeAllViews();
+        for (String userId : list) {
+            UserIdEditor view = (UserIdEditor) mInflater.inflate(R.layout.edit_key_user_id_item,
+                    mEditors, false);
+            view.setEditorListener(this);
+            view.setValue(userId);
+            if (mEditors.getChildCount() == 0) {
+                view.setIsMainUserId(true);
+            }
+            mEditors.addView(view);
+        }
+
+        this.updateEditorsVisible();
+    }
+
+    public void setKeys(Vector<PGPSecretKey> list, Vector<Integer> usages) {
+        if (mType != Id.type.key) {
+            return;
+        }
+
+        mEditors.removeAllViews();
+
+        // go through all keys and set view based on them
+        for (int i = 0; i < list.size(); i++) {
+            KeyEditor view = (KeyEditor) mInflater.inflate(R.layout.edit_key_key_item, mEditors,
+                    false);
+            view.setEditorListener(this);
+            boolean isMasterKey = (mEditors.getChildCount() == 0);
+            view.setValue(list.get(i), isMasterKey, usages.get(i));
+            mEditors.addView(view);
+        }
+
+        this.updateEditorsVisible();
+    }
+
+    private void createKey() {
+        mProgressDialog = new ProgressDialog(getContext());
+        mProgressDialog.setMessage(getContext().getString(R.string.progress_generating));
+        mProgressDialog.setCancelable(false);
+        mProgressDialog.setProgressStyle(ProgressDialog.STYLE_SPINNER);
+        mProgressDialog.show();
+        mRunningThread = new Thread(this);
+        mRunningThread.start();
+    }
+
+    public void run() {
+        String error = null;
+        try {
+            PGPSecretKey masterKey = null;
+            String passPhrase;
+            if (mEditors.getChildCount() > 0) {
+                masterKey = ((KeyEditor) mEditors.getChildAt(0)).getValue();
+                passPhrase = Apg.getCachedPassPhrase(masterKey.getKeyID());
+            } else {
+                passPhrase = "";
+            }
+            mNewKey = Apg.createKey(getContext(), mNewKeyAlgorithmChoice.getId(), mNewKeySize,
+                    passPhrase, masterKey);
+        } catch (NoSuchProviderException e) {
+            error = "" + e;
+        } catch (NoSuchAlgorithmException e) {
+            error = "" + e;
+        } catch (PGPException e) {
+            error = "" + e;
+        } catch (InvalidParameterException e) {
+            error = "" + e;
+        } catch (InvalidAlgorithmParameterException e) {
+            error = "" + e;
+        } catch (Apg.GeneralException e) {
+            error = "" + e;
+        }
+
+        Message message = new Message();
+        Bundle data = new Bundle();
+        data.putBoolean("closeProgressDialog", true);
+        if (error != null) {
+            data.putString(Apg.EXTRA_ERROR, error);
+        } else {
+            data.putBoolean("gotNewKey", true);
+        }
+        message.setData(data);
+        mHandler.sendMessage(message);
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/widget/SelectPublicKeyListAdapter.java

@@ -0,0 +1,216 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.widget;
+
+import java.util.Date;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.provider.KeyRings;
+import org.thialfihar.android.apg.provider.Keys;
+import org.thialfihar.android.apg.provider.UserIds;
+
+import android.app.Activity;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.DatabaseUtils;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteQueryBuilder;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.CheckBox;
+import android.widget.ListView;
+import android.widget.TextView;
+
+public class SelectPublicKeyListAdapter extends BaseAdapter {
+    protected LayoutInflater mInflater;
+    protected ListView mParent;
+    protected SQLiteDatabase mDatabase;
+    protected Cursor mCursor;
+    protected String mSearchString;
+    protected Activity mActivity;
+
+    public SelectPublicKeyListAdapter(Activity activity, ListView parent, String searchString,
+            long selectedKeyIds[]) {
+        mSearchString = searchString;
+
+        mActivity = activity;
+        mParent = parent;
+        mDatabase = Apg.getDatabase().db();
+        mInflater = (LayoutInflater) parent.getContext().getSystemService(
+                Context.LAYOUT_INFLATER_SERVICE);
+        long now = new Date().getTime() / 1000;
+        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
+        qb.setTables(KeyRings.TABLE_NAME + " INNER JOIN " + Keys.TABLE_NAME + " ON " + "("
+                + KeyRings.TABLE_NAME + "." + KeyRings._ID + " = " + Keys.TABLE_NAME + "."
+                + Keys.KEY_RING_ID + " AND " + Keys.TABLE_NAME + "." + Keys.IS_MASTER_KEY
+                + " = '1'" + ") " + " INNER JOIN " + UserIds.TABLE_NAME + " ON " + "("
+                + Keys.TABLE_NAME + "." + Keys._ID + " = " + UserIds.TABLE_NAME + "."
+                + UserIds.KEY_ID + " AND " + UserIds.TABLE_NAME + "." + UserIds.RANK + " = '0') ");
+
+        String inIdList = null;
+
+        if (selectedKeyIds != null && selectedKeyIds.length > 0) {
+            inIdList = KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID + " IN (";
+            for (int i = 0; i < selectedKeyIds.length; ++i) {
+                if (i != 0) {
+                    inIdList += ", ";
+                }
+                inIdList += DatabaseUtils.sqlEscapeString("" + selectedKeyIds[i]);
+            }
+            inIdList += ")";
+        }
+
+        if (searchString != null && searchString.trim().length() > 0) {
+            String[] chunks = searchString.trim().split(" +");
+            qb.appendWhere("(EXISTS (SELECT tmp." + UserIds._ID + " FROM " + UserIds.TABLE_NAME
+                    + " AS tmp WHERE " + "tmp." + UserIds.KEY_ID + " = " + Keys.TABLE_NAME + "."
+                    + Keys._ID);
+            for (int i = 0; i < chunks.length; ++i) {
+                qb.appendWhere(" AND tmp." + UserIds.USER_ID + " LIKE ");
+                qb.appendWhereEscapeString("%" + chunks[i] + "%");
+            }
+            qb.appendWhere("))");
+
+            if (inIdList != null) {
+                qb.appendWhere(" OR (" + inIdList + ")");
+            }
+        }
+
+        String orderBy = UserIds.TABLE_NAME + "." + UserIds.USER_ID + " ASC";
+        if (inIdList != null) {
+            orderBy = inIdList + " DESC, " + orderBy;
+        }
+
+        mCursor = qb.query(mDatabase, new String[] {
+                KeyRings.TABLE_NAME + "." + KeyRings._ID, // 0
+                KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID, // 1
+                UserIds.TABLE_NAME + "." + UserIds.USER_ID, // 2
+                "(SELECT COUNT(tmp." + Keys._ID + ") FROM " + Keys.TABLE_NAME + " AS tmp WHERE "
+                        + "tmp." + Keys.KEY_RING_ID + " = " + KeyRings.TABLE_NAME + "."
+                        + KeyRings._ID + " AND " + "tmp." + Keys.IS_REVOKED + " = '0' AND "
+                        + "tmp." + Keys.CAN_ENCRYPT + " = '1')", // 3
+                "(SELECT COUNT(tmp." + Keys._ID + ") FROM " + Keys.TABLE_NAME + " AS tmp WHERE "
+                        + "tmp." + Keys.KEY_RING_ID + " = " + KeyRings.TABLE_NAME + "."
+                        + KeyRings._ID + " AND " + "tmp." + Keys.IS_REVOKED + " = '0' AND "
+                        + "tmp." + Keys.CAN_ENCRYPT + " = '1' AND " + "tmp." + Keys.CREATION
+                        + " <= '" + now + "' AND " + "(tmp." + Keys.EXPIRY + " IS NULL OR "
+                        + "tmp." + Keys.EXPIRY + " >= '" + now + "'))", // 4
+        }, KeyRings.TABLE_NAME + "." + KeyRings.TYPE + " = ?", new String[] { ""
+                + Id.database.type_public }, null, null, orderBy);
+
+        activity.startManagingCursor(mCursor);
+    }
+
+    public void cleanup() {
+        if (mCursor != null) {
+            mActivity.stopManagingCursor(mCursor);
+            mCursor.close();
+        }
+    }
+
+    @Override
+    public boolean isEnabled(int position) {
+        mCursor.moveToPosition(position);
+        return mCursor.getInt(4) > 0; // valid CAN_ENCRYPT
+    }
+
+    @Override
+    public boolean hasStableIds() {
+        return true;
+    }
+
+    public int getCount() {
+        return mCursor.getCount();
+    }
+
+    public Object getItem(int position) {
+        mCursor.moveToPosition(position);
+        return mCursor.getString(2); // USER_ID
+    }
+
+    public long getItemId(int position) {
+        mCursor.moveToPosition(position);
+        return mCursor.getLong(1); // MASTER_KEY_ID
+    }
+
+    public View getView(int position, View convertView, ViewGroup parent) {
+        mCursor.moveToPosition(position);
+
+        View view = mInflater.inflate(R.layout.select_public_key_item, null);
+        boolean enabled = isEnabled(position);
+
+        TextView mainUserId = (TextView) view.findViewById(R.id.mainUserId);
+        mainUserId.setText(R.string.unknownUserId);
+        TextView mainUserIdRest = (TextView) view.findViewById(R.id.mainUserIdRest);
+        mainUserIdRest.setText("");
+        TextView keyId = (TextView) view.findViewById(R.id.keyId);
+        keyId.setText(R.string.noKey);
+        TextView status = (TextView) view.findViewById(R.id.status);
+        status.setText(R.string.unknownStatus);
+
+        String userId = mCursor.getString(2); // USER_ID
+        if (userId != null) {
+            String chunks[] = userId.split(" <", 2);
+            userId = chunks[0];
+            if (chunks.length > 1) {
+                mainUserIdRest.setText("<" + chunks[1]);
+            }
+            mainUserId.setText(userId);
+        }
+
+        long masterKeyId = mCursor.getLong(1); // MASTER_KEY_ID
+        keyId.setText(Apg.getSmallFingerPrint(masterKeyId));
+
+        if (mainUserIdRest.getText().length() == 0) {
+            mainUserIdRest.setVisibility(View.GONE);
+        }
+
+        if (enabled) {
+            status.setText(R.string.canEncrypt);
+        } else {
+            if (mCursor.getInt(3) > 0) {
+                // has some CAN_ENCRYPT keys, but col(4) = 0, so must be revoked or expired
+                status.setText(R.string.expired);
+            } else {
+                status.setText(R.string.noKey);
+            }
+        }
+
+        status.setText(status.getText() + " ");
+
+        CheckBox selected = (CheckBox) view.findViewById(R.id.selected);
+
+        if (!enabled) {
+            mParent.setItemChecked(position, false);
+        }
+
+        selected.setChecked(mParent.isItemChecked(position));
+
+        view.setEnabled(enabled);
+        mainUserId.setEnabled(enabled);
+        mainUserIdRest.setEnabled(enabled);
+        keyId.setEnabled(enabled);
+        selected.setEnabled(enabled);
+        status.setEnabled(enabled);
+
+        return view;
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/widget/SelectSecretKeyListAdapter.java

@@ -0,0 +1,181 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.widget;
+
+import java.util.Date;
+
+import org.thialfihar.android.apg.R;
+import org.thialfihar.android.apg.Apg;
+import org.thialfihar.android.apg.Id;
+import org.thialfihar.android.apg.provider.KeyRings;
+import org.thialfihar.android.apg.provider.Keys;
+import org.thialfihar.android.apg.provider.UserIds;
+
+import android.app.Activity;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteQueryBuilder;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.BaseAdapter;
+import android.widget.ListView;
+import android.widget.TextView;
+
+public class SelectSecretKeyListAdapter extends BaseAdapter {
+    protected LayoutInflater mInflater;
+    protected ListView mParent;
+    protected SQLiteDatabase mDatabase;
+    protected Cursor mCursor;
+    protected String mSearchString;
+    protected Activity mActivity;
+
+    public SelectSecretKeyListAdapter(Activity activity, ListView parent, String searchString) {
+        mSearchString = searchString;
+
+        mActivity = activity;
+        mParent = parent;
+        mDatabase = Apg.getDatabase().db();
+        mInflater = (LayoutInflater) parent.getContext().getSystemService(
+                Context.LAYOUT_INFLATER_SERVICE);
+        long now = new Date().getTime() / 1000;
+        SQLiteQueryBuilder qb = new SQLiteQueryBuilder();
+        qb.setTables(KeyRings.TABLE_NAME + " INNER JOIN " + Keys.TABLE_NAME + " ON " + "("
+                + KeyRings.TABLE_NAME + "." + KeyRings._ID + " = " + Keys.TABLE_NAME + "."
+                + Keys.KEY_RING_ID + " AND " + Keys.TABLE_NAME + "." + Keys.IS_MASTER_KEY
+                + " = '1'" + ") " + " INNER JOIN " + UserIds.TABLE_NAME + " ON " + "("
+                + Keys.TABLE_NAME + "." + Keys._ID + " = " + UserIds.TABLE_NAME + "."
+                + UserIds.KEY_ID + " AND " + UserIds.TABLE_NAME + "." + UserIds.RANK + " = '0') ");
+
+        if (searchString != null && searchString.trim().length() > 0) {
+            String[] chunks = searchString.trim().split(" +");
+            qb.appendWhere("EXISTS (SELECT tmp." + UserIds._ID + " FROM " + UserIds.TABLE_NAME
+                    + " AS tmp WHERE " + "tmp." + UserIds.KEY_ID + " = " + Keys.TABLE_NAME + "."
+                    + Keys._ID);
+            for (int i = 0; i < chunks.length; ++i) {
+                qb.appendWhere(" AND tmp." + UserIds.USER_ID + " LIKE ");
+                qb.appendWhereEscapeString("%" + chunks[i] + "%");
+            }
+            qb.appendWhere(")");
+        }
+
+        mCursor = qb.query(mDatabase, new String[] {
+                KeyRings.TABLE_NAME + "." + KeyRings._ID, // 0
+                KeyRings.TABLE_NAME + "." + KeyRings.MASTER_KEY_ID, // 1
+                UserIds.TABLE_NAME + "." + UserIds.USER_ID, // 2
+                "(SELECT COUNT(tmp." + Keys._ID + ") FROM " + Keys.TABLE_NAME + " AS tmp WHERE "
+                        + "tmp." + Keys.KEY_RING_ID + " = " + KeyRings.TABLE_NAME + "."
+                        + KeyRings._ID + " AND " + "tmp." + Keys.IS_REVOKED + " = '0' AND "
+                        + "tmp." + Keys.CAN_SIGN + " = '1')", // 3,
+                "(SELECT COUNT(tmp." + Keys._ID + ") FROM " + Keys.TABLE_NAME + " AS tmp WHERE "
+                        + "tmp." + Keys.KEY_RING_ID + " = " + KeyRings.TABLE_NAME + "."
+                        + KeyRings._ID + " AND " + "tmp." + Keys.IS_REVOKED + " = '0' AND "
+                        + "tmp." + Keys.CAN_SIGN + " = '1' AND " + "tmp." + Keys.CREATION + " <= '"
+                        + now + "' AND " + "(tmp." + Keys.EXPIRY + " IS NULL OR " + "tmp."
+                        + Keys.EXPIRY + " >= '" + now + "'))", // 4
+        }, KeyRings.TABLE_NAME + "." + KeyRings.TYPE + " = ?", new String[] { ""
+                + Id.database.type_secret }, null, null, UserIds.TABLE_NAME + "." + UserIds.USER_ID
+                + " ASC");
+
+        activity.startManagingCursor(mCursor);
+    }
+
+    public void cleanup() {
+        if (mCursor != null) {
+            mActivity.stopManagingCursor(mCursor);
+            mCursor.close();
+        }
+    }
+
+    @Override
+    public boolean isEnabled(int position) {
+        mCursor.moveToPosition(position);
+        return mCursor.getInt(4) > 0; // valid CAN_SIGN
+    }
+
+    @Override
+    public boolean hasStableIds() {
+        return true;
+    }
+
+    public int getCount() {
+        return mCursor.getCount();
+    }
+
+    public Object getItem(int position) {
+        mCursor.moveToPosition(position);
+        return mCursor.getString(2); // USER_ID
+    }
+
+    public long getItemId(int position) {
+        mCursor.moveToPosition(position);
+        return mCursor.getLong(1); // MASTER_KEY_ID
+    }
+
+    public View getView(int position, View convertView, ViewGroup parent) {
+        mCursor.moveToPosition(position);
+
+        View view = mInflater.inflate(R.layout.select_secret_key_item, null);
+        boolean enabled = isEnabled(position);
+
+        TextView mainUserId = (TextView) view.findViewById(R.id.mainUserId);
+        mainUserId.setText(R.string.unknownUserId);
+        TextView mainUserIdRest = (TextView) view.findViewById(R.id.mainUserIdRest);
+        mainUserIdRest.setText("");
+        TextView keyId = (TextView) view.findViewById(R.id.keyId);
+        keyId.setText(R.string.noKey);
+        TextView status = (TextView) view.findViewById(R.id.status);
+        status.setText(R.string.unknownStatus);
+
+        String userId = mCursor.getString(2); // USER_ID
+        if (userId != null) {
+            String chunks[] = userId.split(" <", 2);
+            userId = chunks[0];
+            if (chunks.length > 1) {
+                mainUserIdRest.setText("<" + chunks[1]);
+            }
+            mainUserId.setText(userId);
+        }
+
+        long masterKeyId = mCursor.getLong(1); // MASTER_KEY_ID
+        keyId.setText(Apg.getSmallFingerPrint(masterKeyId));
+
+        if (mainUserIdRest.getText().length() == 0) {
+            mainUserIdRest.setVisibility(View.GONE);
+        }
+
+        if (enabled) {
+            status.setText(R.string.canSign);
+        } else {
+            if (mCursor.getInt(3) > 0) {
+                // has some CAN_SIGN keys, but col(4) = 0, so must be revoked or expired
+                status.setText(R.string.expired);
+            } else {
+                status.setText(R.string.noKey);
+            }
+        }
+
+        status.setText(status.getText() + " ");
+
+        view.setEnabled(enabled);
+        mainUserId.setEnabled(enabled);
+        mainUserIdRest.setEnabled(enabled);
+        keyId.setEnabled(enabled);
+        status.setEnabled(enabled);
+
+        return view;
+    }
+}

org_apg/src/org/thialfihar/android/apg/ui/widget/UserIdEditor.java

@@ -0,0 +1,195 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.ui.widget;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import org.thialfihar.android.apg.R;
+
+import android.content.Context;
+import android.util.AttributeSet;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.EditText;
+import android.widget.ImageButton;
+import android.widget.LinearLayout;
+import android.widget.RadioButton;
+
+public class UserIdEditor extends LinearLayout implements Editor, OnClickListener {
+    private EditorListener mEditorListener = null;
+
+    private ImageButton mDeleteButton;
+    private RadioButton mIsMainUserId;
+    private EditText mName;
+    private EditText mEmail;
+    private EditText mComment;
+
+    // see http://www.regular-expressions.info/email.html
+    // RFC 2822 if we omit the syntax using double quotes and square brackets
+    private static final Pattern EMAIL_PATTERN = Pattern
+            .compile(
+                    "[a-z0-9!#$%&'*+/=?^_`{|}~-]+(?:\\.[a-z0-9!#$%&'*+/=?^_`{|}~-]+)*@(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?",
+                    Pattern.CASE_INSENSITIVE);
+
+    public static class NoNameException extends Exception {
+        static final long serialVersionUID = 0xf812773343L;
+
+        public NoNameException(String message) {
+            super(message);
+        }
+    }
+
+    public static class NoEmailException extends Exception {
+        static final long serialVersionUID = 0xf812773344L;
+
+        public NoEmailException(String message) {
+            super(message);
+        }
+    }
+
+    public static class InvalidEmailException extends Exception {
+        static final long serialVersionUID = 0xf812773345L;
+
+        public InvalidEmailException(String message) {
+            super(message);
+        }
+    }
+
+    public UserIdEditor(Context context) {
+        super(context);
+    }
+
+    public UserIdEditor(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    @Override
+    protected void onFinishInflate() {
+        setDrawingCacheEnabled(true);
+        setAlwaysDrawnWithCacheEnabled(true);
+
+        mDeleteButton = (ImageButton) findViewById(R.id.delete);
+        mDeleteButton.setOnClickListener(this);
+        mIsMainUserId = (RadioButton) findViewById(R.id.isMainUserId);
+        mIsMainUserId.setOnClickListener(this);
+
+        mName = (EditText) findViewById(R.id.name);
+        mEmail = (EditText) findViewById(R.id.email);
+        mComment = (EditText) findViewById(R.id.comment);
+
+        super.onFinishInflate();
+    }
+
+    public void setValue(String userId) {
+        mName.setText("");
+        mComment.setText("");
+        mEmail.setText("");
+
+        Pattern withComment = Pattern.compile("^(.*) [(](.*)[)] <(.*)>$");
+        Matcher matcher = withComment.matcher(userId);
+        if (matcher.matches()) {
+            mName.setText(matcher.group(1));
+            mComment.setText(matcher.group(2));
+            mEmail.setText(matcher.group(3));
+            return;
+        }
+
+        Pattern withoutComment = Pattern.compile("^(.*) <(.*)>$");
+        matcher = withoutComment.matcher(userId);
+        if (matcher.matches()) {
+            mName.setText(matcher.group(1));
+            mEmail.setText(matcher.group(2));
+            return;
+        }
+    }
+
+    public String getValue() throws NoNameException, NoEmailException, InvalidEmailException {
+        String name = ("" + mName.getText()).trim();
+        String email = ("" + mEmail.getText()).trim();
+        String comment = ("" + mComment.getText()).trim();
+
+        if (email.length() > 0) {
+            Matcher emailMatcher = EMAIL_PATTERN.matcher(email);
+            if (!emailMatcher.matches()) {
+                throw new InvalidEmailException(getContext().getString(R.string.error_invalidEmail,
+                        email));
+            }
+        }
+
+        String userId = name;
+        if (comment.length() > 0) {
+            userId += " (" + comment + ")";
+        }
+        if (email.length() > 0) {
+            userId += " <" + email + ">";
+        }
+
+        if (userId.equals("")) {
+            // ok, empty one...
+            return userId;
+        }
+
+        // otherwise make sure that name and email exist
+        if (name.equals("")) {
+            throw new NoNameException("need a name");
+        }
+
+        if (email.equals("")) {
+            throw new NoEmailException("need an email");
+        }
+
+        return userId;
+    }
+
+    public void onClick(View v) {
+        final ViewGroup parent = (ViewGroup) getParent();
+        if (v == mDeleteButton) {
+            boolean wasMainUserId = mIsMainUserId.isChecked();
+            parent.removeView(this);
+            if (mEditorListener != null) {
+                mEditorListener.onDeleted(this);
+            }
+            if (wasMainUserId && parent.getChildCount() > 0) {
+                UserIdEditor editor = (UserIdEditor) parent.getChildAt(0);
+                editor.setIsMainUserId(true);
+            }
+        } else if (v == mIsMainUserId) {
+            for (int i = 0; i < parent.getChildCount(); ++i) {
+                UserIdEditor editor = (UserIdEditor) parent.getChildAt(i);
+                if (editor == this) {
+                    editor.setIsMainUserId(true);
+                } else {
+                    editor.setIsMainUserId(false);
+                }
+            }
+        }
+    }
+
+    public void setIsMainUserId(boolean value) {
+        mIsMainUserId.setChecked(value);
+    }
+
+    public boolean isMainUserId() {
+        return mIsMainUserId.isChecked();
+    }
+
+    public void setEditorListener(EditorListener listener) {
+        mEditorListener = listener;
+    }
+}

org_apg/src/org/thialfihar/android/apg/util/ApgCon.java

@@ -0,0 +1,836 @@
+/*
+ * Copyright (C) 2011 Markus Doits <markus.doits@googlemail.com>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.util;
+
+import org.thialfihar.android.apg.IApgService;
+import org.thialfihar.android.apg.util.ApgConInterface.OnCallFinishListener;
+
+import android.content.ComponentName;
+import android.content.ContentResolver;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.Intent;
+import android.content.ServiceConnection;
+import android.content.pm.PackageManager;
+import android.content.pm.ServiceInfo;
+import android.net.Uri;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.os.IBinder;
+import android.util.Log;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+import java.lang.reflect.InvocationTargetException;
+import java.util.ArrayList;
+
+/**
+ * A APG-AIDL-Wrapper
+ * 
+ * <p>
+ * This class can be used by other projects to simplify connecting to the
+ * APG-AIDL-Service. Kind of wrapper of for AIDL.
+ * </p>
+ * 
+ * <p>
+ * It is not used in this project.
+ * </p>
+ * 
+ * @author Markus Doits <markus.doits@googlemail.com>
+ * @version 1.1rc1
+ * 
+ */
+public class ApgCon {
+    private static final boolean LOCAL_LOGV = true;
+    private static final boolean LOCAL_LOGD = true;
+
+    private final static String TAG = "ApgCon";
+    private final static int API_VERSION = 2; // aidl api-version it expects
+    private final static String BLOB_URI = "content://org.thialfihar.android.apg.provider.apgserviceblobprovider";
+    
+    /**
+     * How many seconds to wait for a connection to AGP when connecting.
+     * Being unsuccessful for this number of seconds, a connection
+     * is assumed to be failed.
+     */
+    public int secondsToWaitForConnection = 15;
+
+    private class CallAsync extends AsyncTask<String, Void, Void> {
+
+        @Override
+        protected Void doInBackground(String... arg) {
+            if( LOCAL_LOGD ) Log.d(TAG, "Async execution starting");
+            call(arg[0]);
+            return null;
+        }
+
+        protected void onPostExecute(Void res) {
+            if( LOCAL_LOGD ) Log.d(TAG, "Async execution finished");
+            mAsyncRunning = false;
+
+        }
+
+    }
+
+    private final Context mContext;
+    private final error mConnectionStatus;
+    private boolean mAsyncRunning = false;
+    private OnCallFinishListener mOnCallFinishListener;
+
+    private final Bundle mResult = new Bundle();
+    private final Bundle mArgs = new Bundle();
+    private final ArrayList<String> mErrorList = new ArrayList<String>();
+    private final ArrayList<String> mWarningList = new ArrayList<String>();
+
+    /** Remote service for decrypting and encrypting data */
+    private IApgService mApgService = null;
+
+    /** Set apgService accordingly to connection status */
+    private ServiceConnection mApgConnection = new ServiceConnection() {
+        public void onServiceConnected(ComponentName className, IBinder service) {
+            if( LOCAL_LOGD ) Log.d(TAG, "IApgService bound to apgService");
+            mApgService = IApgService.Stub.asInterface(service);
+        }
+
+        public void onServiceDisconnected(ComponentName className) {
+            if( LOCAL_LOGD ) Log.d(TAG, "IApgService disconnected");
+            mApgService = null;
+        }
+    };
+    
+    /**
+     * Different types of local errors
+     */
+    public static enum error {
+        /**
+         * no error
+         */
+        NO_ERROR,
+        /**
+         * generic error
+         */
+        GENERIC,
+        /**
+         * connection to apg service not possible
+         */
+        CANNOT_BIND_TO_APG,
+        /**
+         * function to call not provided
+         */
+        CALL_MISSING,
+        /**
+         * apg service does not know what to do
+         */
+        CALL_NOT_KNOWN,
+        /**
+         * could not find APG being installed
+         */
+        APG_NOT_FOUND,
+        /**
+         * found APG but without AIDL interface
+         */
+        APG_AIDL_MISSING,
+        /**
+         * found APG but with wrong API
+         */
+        APG_API_MISSMATCH
+    }
+
+    private static enum ret {
+        ERROR, // returned from AIDL
+        RESULT, // returned from AIDL
+        WARNINGS, // mixed AIDL and LOCAL
+        ERRORS, // mixed AIDL and LOCAL
+    }
+
+    /**
+     * Constructor
+     * 
+     * <p>
+     * Creates a new ApgCon object and searches for the right APG version on
+     * initialization. If not found, errors are printed to the error log.
+     * </p>
+     * 
+     * @param ctx
+     *            the running context
+     */
+    public ApgCon(Context ctx) {
+        if( LOCAL_LOGV ) Log.v(TAG, "EncryptionService created");
+        mContext = ctx;
+
+        error tmpError = null;
+        try {
+            if( LOCAL_LOGV ) Log.v(TAG, "Searching for the right APG version");
+            ServiceInfo apgServices[] = ctx.getPackageManager().getPackageInfo("org.thialfihar.android.apg",
+                    PackageManager.GET_SERVICES | PackageManager.GET_META_DATA).services;
+            if (apgServices == null) {
+                Log.e(TAG, "Could not fetch services");
+                tmpError = error.GENERIC;
+            } else {
+                boolean apgServiceFound = false;
+                for (ServiceInfo inf : apgServices) {
+                    if( LOCAL_LOGV ) Log.v(TAG, "Found service of APG: " + inf.name);
+                    if (inf.name.equals("org.thialfihar.android.apg.ApgService")) {
+                        apgServiceFound = true;
+                        if (inf.metaData == null) {
+                            Log.w(TAG, "Could not determine ApgService API");
+                            Log.w(TAG, "This probably won't work!");
+                            mWarningList.add("(LOCAL) Could not determine ApgService API");
+                            tmpError = error.APG_API_MISSMATCH;
+                        } else if (inf.metaData.getInt("api_version") != API_VERSION) {
+                            Log.w(TAG, "Found ApgService API version " + inf.metaData.getInt("api_version") + " but exspected " + API_VERSION);
+                            Log.w(TAG, "This probably won't work!");
+                            mWarningList.add("(LOCAL) Found ApgService API version " + inf.metaData.getInt("api_version") + " but exspected " + API_VERSION);
+                            tmpError = error.APG_API_MISSMATCH;
+                        } else {
+                            if( LOCAL_LOGV ) Log.v(TAG, "Found api_version " + API_VERSION + ", everything should work");
+                            tmpError = error.NO_ERROR;
+                        }
+                    }
+                }
+
+                if (!apgServiceFound) {
+                    Log.e(TAG, "Could not find APG with AIDL interface, this probably won't work");
+                    mErrorList.add("(LOCAL) Could not find APG with AIDL interface, this probably won't work");
+                    mResult.putInt(ret.ERROR.name(), error.APG_AIDL_MISSING.ordinal());
+                    tmpError = error.APG_NOT_FOUND;
+                }
+            }
+        } catch (PackageManager.NameNotFoundException e) {
+            Log.e(TAG, "Could not find APG, is it installed?", e);
+            mErrorList.add("(LOCAL) Could not find APG, is it installed?");
+            mResult.putInt(ret.ERROR.name(), error.APG_NOT_FOUND.ordinal());
+            tmpError = error.APG_NOT_FOUND;
+        }
+        
+        mConnectionStatus = tmpError;
+
+    }
+
+    /** try to connect to the apg service */
+    private boolean connect() {
+        if( LOCAL_LOGV ) Log.v(TAG, "trying to bind the apgService to context");
+
+        if (mApgService != null) {
+            if( LOCAL_LOGV ) Log.v(TAG, "allready connected");
+            return true;
+        }
+
+        try {
+            mContext.bindService(new Intent(IApgService.class.getName()), mApgConnection, Context.BIND_AUTO_CREATE);
+        } catch (Exception e) {
+            Log.e(TAG, "could not bind APG service", e);
+            return false;
+        }
+
+        int waitCount = 0;
+        while (mApgService == null && waitCount++ < secondsToWaitForConnection) {
+            if( LOCAL_LOGV ) Log.v(TAG, "sleeping 1 second to wait for apg");
+            android.os.SystemClock.sleep(1000);
+        }
+
+        if (waitCount >= secondsToWaitForConnection) {
+            if( LOCAL_LOGV ) Log.v(TAG, "slept waiting for nothing!");
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Disconnects ApgCon from Apg
+     * 
+     * <p>
+     * This should be called whenever all work with APG is done (e.g. everything
+     * you wanted to encrypt is encrypted), since connections with AIDL should
+     * not be upheld indefinitely.
+     * <p>
+     * 
+     * <p>
+     * Also, if you destroy you end using your ApgCon-instance, this must be
+     * called or else the connection to APG is leaked
+     * </p>
+     */
+    public void disconnect() {
+        if( LOCAL_LOGV ) Log.v(TAG, "disconnecting apgService");
+        if (mApgService != null) {
+            mContext.unbindService(mApgConnection);
+            mApgService = null;
+        }
+    }
+
+    private boolean initialize() {
+        if (mApgService == null) {
+            if (!connect()) {
+                if( LOCAL_LOGV ) Log.v(TAG, "connection to apg service failed");
+                return false;
+            }
+        }
+        return true;
+    }
+
+    /**
+     * Calls a function from APG's AIDL-interface
+     * 
+     * <p>
+     * After you have set up everything with {@link #setArg(String, String)}
+     * (and variants), you can call a function of the AIDL-interface. This
+     * will:
+     * <ul>
+     * <li>start connection to the remote interface (if not already connected)</li>
+     * <li>call the function passed with all parameters synchronously</li>
+     * <li>set up everything to retrieve the result and/or warnings/errors</li>
+     * <li>call the callback if provided
+     * </ul>
+     * </p>
+     * 
+     * <p>
+     * Note your thread will be blocked during execution - if you want to call
+     * the function asynchronously, see {@link #callAsync(String)}.
+     * </p>
+     * 
+     * @param function
+     *            a remote function to call
+     * @return true, if call successful (= no errors), else false
+     * 
+     * @see #callAsync(String)
+     * @see #setArg(String, String)
+     * @see #setOnCallFinishListener(OnCallFinishListener)
+     */
+    public boolean call(String function) {
+        boolean success = this.call(function, mArgs, mResult);
+        if (mOnCallFinishListener != null) {
+            try {
+                if( LOCAL_LOGD ) Log.d(TAG, "About to execute callback");
+                mOnCallFinishListener.onCallFinish(mResult);
+                if( LOCAL_LOGD ) Log.d(TAG, "Callback executed");
+            } catch (Exception e) {
+                Log.w(TAG, "Exception on callback: (" + e.getClass() + ") " + e.getMessage(), e);
+                mWarningList.add("(LOCAL) Could not execute callback (" + e.getClass() + "): " + e.getMessage());
+            }
+        }
+        return success;
+    }
+
+    /**
+     * Calls a function of remote interface asynchronously
+     * 
+     * <p>
+     * This does exactly the same as {@link #call(String)}, but asynchronously.
+     * While connection to APG and work are done in background, your thread can
+     * go on executing.
+     * <p>
+     * 
+     * <p>
+     * To see whether the task is finished, you have two possibilities:
+     * <ul>
+     * <li>In your thread, poll {@link #isRunning()}</li>
+     * <li>Supply a callback with {@link #setOnCallFinishListener(OnCallFinishListener)}</li>
+     * </ul>
+     * </p>
+     * 
+     * @param function
+     *            a remote function to call
+     * 
+     * @see #call(String)
+     * @see #isRunning()
+     * @see #setOnCallFinishListener(OnCallFinishListener)
+     */
+    public void callAsync(String function) {
+        mAsyncRunning = true;
+        new CallAsync().execute(function);
+    }
+
+    private boolean call(String function, Bundle pArgs, Bundle pReturn) {
+
+        if (!initialize()) {
+            mErrorList.add("(LOCAL) Cannot bind to ApgService");
+            mResult.putInt(ret.ERROR.name(), error.CANNOT_BIND_TO_APG.ordinal());
+            return false;
+        }
+
+        if (function == null || function.length() == 0) {
+            mErrorList.add("(LOCAL) Function to call missing");
+            mResult.putInt(ret.ERROR.name(), error.CALL_MISSING.ordinal());
+            return false;
+        }
+
+        try {
+            Boolean success = (Boolean) IApgService.class.getMethod(function, Bundle.class, Bundle.class).invoke(mApgService, pArgs, pReturn);
+            mErrorList.addAll(pReturn.getStringArrayList(ret.ERRORS.name()));
+            mWarningList.addAll(pReturn.getStringArrayList(ret.WARNINGS.name()));
+            return success;
+        } catch (NoSuchMethodException e) {
+            Log.e(TAG, "Remote call not known (" + function + "): " + e.getMessage(), e);
+            mErrorList.add("(LOCAL) Remote call not known (" + function + "): " + e.getMessage());
+            mResult.putInt(ret.ERROR.name(), error.CALL_NOT_KNOWN.ordinal());
+            return false;
+        } catch (InvocationTargetException e) {
+            Throwable orig = e.getTargetException();
+            Log.w(TAG, "Exception of type '" + orig.getClass() + "' on AIDL call '" + function + "': " + orig.getMessage(), orig);
+            mErrorList.add("(LOCAL) Exception of type '" + orig.getClass() + "' on AIDL call '" + function + "': " + orig.getMessage());
+            return false;
+        } catch (Exception e) {
+            Log.e(TAG, "Generic error (" + e.getClass() + "): " + e.getMessage(), e);
+            mErrorList.add("(LOCAL) Generic error (" + e.getClass() + "): " + e.getMessage());
+            mResult.putInt(ret.ERROR.name(), error.GENERIC.ordinal());
+            return false;
+        }
+
+    }
+
+    /**
+     * Set a string argument for APG
+     * 
+     * <p>
+     * This defines a string argument for APG's AIDL-interface.
+     * </p>
+     * 
+     * <p>
+     * To know what key-value-pairs are possible (or required), take a look into
+     * the IApgService.aidl
+     * </p>
+     * 
+     * <p>
+     * Note that parameters are not reseted after a call, so you have to
+     * reset ({@link #clearArgs()}) them manually if you want to.
+     * </p>
+     * 
+     * 
+     * @param key
+     *            the key
+     * @param val
+     *            the value
+     * 
+     * @see #clearArgs()
+     */
+    public void setArg(String key, String val) {
+        mArgs.putString(key, val);
+    }
+
+    /**
+     * Set a string-array argument for APG
+     * 
+     * <p>
+     * If the AIDL-parameter is an {@literal ArrayList<String>}, you have to use
+     * this function.
+     * </p>
+     * 
+     * <code>
+     * <pre>
+     * setArg("a key", new String[]{ "entry 1", "entry 2" });
+     * </pre>
+     * </code>
+     * 
+     * @param key
+     *            the key
+     * @param vals
+     *            the value
+     * 
+     * @see #setArg(String, String)
+     */
+    public void setArg(String key, String vals[]) {
+        ArrayList<String> list = new ArrayList<String>();
+        for (String val : vals) {
+            list.add(val);
+        }
+        mArgs.putStringArrayList(key, list);
+    }
+
+    /**
+     * Set up a boolean argument for APG
+     * 
+     * @param key
+     *            the key
+     * @param vals
+     *            the value
+     * 
+     * @see #setArg(String, String)
+     */
+    public void setArg(String key, boolean val) {
+        mArgs.putBoolean(key, val);
+    }
+
+    /**
+     * Set up a int argument for APG
+     * 
+     * @param key
+     *            the key
+     * @param vals
+     *            the value
+     * 
+     * @see #setArg(String, String)
+     */
+    public void setArg(String key, int val) {
+        mArgs.putInt(key, val);
+    }
+
+    /**
+     * Set up a int-array argument for APG
+     * <p>
+     * If the AIDL-parameter is an {@literal ArrayList<Integer>}, you have to
+     * use this function.
+     * </p>
+     * 
+     * @param key
+     *            the key
+     * @param vals
+     *            the value
+     * 
+     * @see #setArg(String, String)
+     */
+    public void setArg(String key, int vals[]) {
+        ArrayList<Integer> list = new ArrayList<Integer>();
+        for (int val : vals) {
+            list.add(val);
+        }
+        mArgs.putIntegerArrayList(key, list);
+    }
+    
+    /**
+     * Set up binary data to en/decrypt
+     * 
+     * @param is
+     *          InputStream to get the data from
+     */
+    public void setBlob(InputStream is) {
+        if( LOCAL_LOGD ) Log.d(TAG, "setBlob() called");
+        // 1. get the new contentUri
+        ContentResolver cr = mContext.getContentResolver();
+        Uri contentUri = cr.insert(Uri.parse(BLOB_URI), new ContentValues());
+        
+        // 2. insert binary data
+        OutputStream os = null;
+        try {
+            os = cr.openOutputStream(contentUri, "w");
+        } catch( Exception e ) {
+            Log.e(TAG, "... exception on setBlob", e);
+        }
+        
+        byte[] buffer = new byte[8];
+        int len = 0;
+        try {
+            while( (len = is.read(buffer)) != -1) {
+                os.write(buffer, 0, len);
+            }
+            if(LOCAL_LOGD) Log.d(TAG, "... write finished, now closing");
+            os.close();
+        } catch (Exception e) {
+            Log.e(TAG, "... error on writing buffer", e);
+        }
+        
+        mArgs.putString("BLOB", contentUri.toString() );
+    }
+
+    /**
+     * Clears all arguments
+     * 
+     * <p>
+     * Anything the has been set up with the various
+     * {@link #setArg(String, String)} functions is cleared.
+     * </p>
+     * 
+     * <p>
+     * Note that any warning, error, callback, result, etc. is NOT cleared with
+     * this.
+     * </p>
+     * 
+     * @see #reset()
+     */
+    public void clearArgs() {
+        mArgs.clear();
+    }
+
+    /**
+     * Return the object associated with the key
+     * 
+     * @param key
+     *            the object's key you want to return
+     * @return an object at position key, or null if not set
+     */
+    public Object getArg(String key) {
+        return mArgs.get(key);
+    }
+
+    /**
+     * Iterates through the errors
+     * 
+     * <p>
+     * With this method you can iterate through all errors. The errors are only
+     * returned once and deleted immediately afterwards, so you can only return
+     * each error once.
+     * </p>
+     * 
+     * @return a human readable description of a error that happened, or null if
+     *         no more errors
+     * 
+     * @see #hasNextError()
+     * @see #clearErrors()
+     */
+    public String getNextError() {
+        if (mErrorList.size() != 0)
+            return mErrorList.remove(0);
+        else
+            return null;
+    }
+
+    /**
+     * Check if there are any new errors
+     * 
+     * @return true, if there are unreturned errors, false otherwise
+     * 
+     * @see #getNextError()
+     */
+    public boolean hasNextError() {
+        return mErrorList.size() != 0;
+    }
+
+    /**
+     * Get the numeric representation of the last error
+     * 
+     * <p>
+     * Values <100 mean the error happened locally, values >=100 mean the error
+     * happened at the remote side (APG). See the IApgService.aidl (or get the
+     * human readable description with {@link #getNextError()}) for what
+     * errors >=100 mean.
+     * </p>
+     * 
+     * @return the id of the error that happened
+     */
+    public int getError() {
+        if (mResult.containsKey(ret.ERROR.name()))
+            return mResult.getInt(ret.ERROR.name());
+        else
+            return -1;
+    }
+
+    /**
+     * Iterates through the warnings
+     * 
+     * <p>
+     * With this method you can iterate through all warnings. Warnings are
+     * only returned once and deleted immediately afterwards, so you can only
+     * return each warning once.
+     * </p>
+     * 
+     * @return a human readable description of a warning that happened, or null
+     *         if no more warnings
+     * 
+     * @see #hasNextWarning()
+     * @see #clearWarnings()
+     */
+    public String getNextWarning() {
+        if (mWarningList.size() != 0)
+            return mWarningList.remove(0);
+        else
+            return null;
+    }
+
+    /**
+     * Check if there are any new warnings
+     * 
+     * @return true, if there are unreturned warnings, false otherwise
+     * 
+     * @see #getNextWarning()
+     */
+    public boolean hasNextWarning() {
+        return mWarningList.size() != 0;
+    }
+
+    /**
+     * Get the result
+     * 
+     * <p>
+     * This gets your result. After doing an encryption or decryption with APG,
+     * you get the output with this function.
+     * </p>
+     * 
+     * <p>
+     * Note when your last remote call is unsuccessful, the result will
+     * still have the same value like the last successful call (or null, if no
+     * call was successful). To ensure you do not work with old call's results,
+     * either be sure to {@link #reset()} (or at least {@link #clearResult()})
+     * your instance before each new call or always check that
+     * {@link #hasNextError()} is false.
+     * </p>
+     * 
+     * <p>
+     * Note: When handling binary data with {@link #setBlob(InputStream)}, you
+     * get your result with {@link #getBlobResult()}.
+     * </p>
+     * 
+     * @return the mResult of the last {@link #call(String)} or
+     *         {@link #callAsync(String)}.
+     * 
+     * @see #reset()
+     * @see #clearResult()
+     * @see #getResultBundle()
+     * @see #getBlobResult()
+     */
+    public String getResult() {
+        return mResult.getString(ret.RESULT.name());
+    }
+
+    /**
+     * Get the binary result
+     * 
+     * <p>
+     * This gets your binary result. It only works if you called {@link #setBlob(InputStream)} before.
+     * 
+     * If you did not call encrypt nor decrypt, this will be the same data as you inputed.
+     * </p>
+     * 
+     * @return InputStream of the binary data which was en/decrypted
+     * 
+     * @see #setBlob(InputStream)
+     * @see #getResult()
+     */
+    public InputStream getBlobResult() {
+        if(mArgs.containsKey("BLOB")) {
+            ContentResolver cr = mContext.getContentResolver();
+            InputStream in = null;
+            try {
+                in = cr.openInputStream(Uri.parse(mArgs.getString("BLOB")));
+            } catch( Exception e ) {
+                Log.e(TAG, "Could not return blob in result", e);
+            }
+            return in;
+        } else {
+            return null;
+        }
+    }
+
+    /**
+     * Get the result bundle
+     * 
+     * <p>
+     * Unlike {@link #getResult()}, which only returns any en-/decrypted
+     * message, this function returns the complete information that was returned
+     * by Apg. This also includes the "RESULT", but additionally the warnings,
+     * errors and any other information.
+     * </p>
+     * <p>
+     * For warnings and errors it is suggested to use the functions that are
+     * provided here, namely {@link #getError()}, {@link #getNextError()},
+     * {@link #get_next_Warning()} etc.), but if any call returns something non
+     * standard, you have access to the complete result bundle to extract the
+     * information.
+     * </p>
+     * 
+     * @return the complete result bundle of the last call to apg
+     */
+    public Bundle getResultBundle() {
+        return mResult;
+    }
+
+    public error getConnectionStatus() {
+        return mConnectionStatus;
+    }
+
+    /**
+     * Clears all unfetched errors
+     * 
+     * @see #getNextError()
+     * @see #hasNextError()
+     */
+    public void clearErrors() {
+        mErrorList.clear();
+        mResult.remove(ret.ERROR.name());
+    }
+
+    /**
+     * Clears all unfetched warnings
+     * 
+     * @see #getNextWarning()
+     * @see #hasNextWarning()
+     */
+    public void clearWarnings() {
+        mWarningList.clear();
+    }
+
+    /**
+     * Clears the last mResult
+     * 
+     * @see #getResult()
+     */
+    public void clearResult() {
+        mResult.remove(ret.RESULT.name());
+    }
+
+    /**
+     * Set a callback listener when call to AIDL finishes
+     * 
+     * @param obj
+     *            a object to call back after async execution
+     * @see ApgConInterface
+     */
+    public void setOnCallFinishListener(OnCallFinishListener lis) {
+        mOnCallFinishListener = lis;
+    }
+
+    /**
+     * Clears any callback object
+     * 
+     * @see #setOnCallFinishListener(OnCallFinishListener)
+     */
+    public void clearOnCallFinishListener() {
+        mOnCallFinishListener = null;
+    }
+
+    /**
+     * Checks if an async execution is running
+     * 
+     * <p>
+     * If you started something with {@link #callAsync(String)}, this will
+     * return true if the task is still running
+     * </p>
+     * 
+     * @return true, if an async task is still running, false otherwise
+     * 
+     * @see #callAsync(String)
+     * 
+     */
+    public boolean isRunning() {
+        return mAsyncRunning;
+    }
+
+    /**
+     * Completely resets your instance
+     * 
+     * <p>
+     * This currently resets everything in this instance. Errors, warnings,
+     * results, callbacks, ... are removed. Any connection to the remote
+     * interface is upheld, though.
+     * </p>
+     * 
+     * <p>
+     * Note when an async execution ({@link #callAsync(String)}) is
+     * running, it's result, warnings etc. will still be evaluated (which might
+     * be not what you want). Also mind that any callback you set is also
+     * reseted, so when finishing the execution any before defined callback will
+     * NOT BE TRIGGERED.
+     * </p>
+     */
+    public void reset() {
+        clearErrors();
+        clearWarnings();
+        clearArgs();
+        clearOnCallFinishListener();
+        mResult.clear();
+    }
+
+}

org_apg/src/org/thialfihar/android/apg/util/ApgConInterface.java

@@ -0,0 +1,21 @@
+/*
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.util;
+
+public interface ApgConInterface {
+    public static interface OnCallFinishListener {
+        public abstract void onCallFinish(android.os.Bundle result);
+    }
+}

org_apg/src/org/thialfihar/android/apg/util/Choice.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.util;
+
+public class Choice {
+    private String mName;
+    private int mId;
+
+    public Choice() {
+        mId = -1;
+        mName = "";
+    }
+
+    public Choice(int id, String name) {
+        mId = id;
+        mName = name;
+    }
+
+    public int getId() {
+        return mId;
+    }
+
+    public String getName() {
+        return mName;
+    }
+
+    @Override
+	public String toString() {
+        return mName;
+    }
+}

org_apg/src/org/thialfihar/android/apg/util/Compatibility.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.util;
+
+import java.lang.reflect.Method;
+
+import android.content.Context;
+import android.util.Log;
+
+public class Compatibility {
+
+    private static final String clipboardLabel = "APG";
+
+    /**
+     * Wrapper around ClipboardManager based on Android version using Reflection API, from
+     * http://www.projectsexception.com/blog/?p=87
+     * 
+     * @param context
+     * @param text
+     */
+    public static void copyToClipboard(Context context, String text) {
+        Object clipboard = context.getSystemService(Context.CLIPBOARD_SERVICE);
+        try {
+            if ("android.text.ClipboardManager".equals(clipboard.getClass().getName())) {
+                Method method = clipboard.getClass().getMethod("setText", CharSequence.class);
+                method.invoke(clipboard, text);
+            } else if ("android.content.ClipboardManager".equals(clipboard.getClass().getName())) {
+                Class<?> clazz = Class.forName("android.content.ClipData");
+                Method method = clazz.getMethod("newPlainText", CharSequence.class,
+                        CharSequence.class);
+                Object clip = method.invoke(null, clipboardLabel, text);
+                method = clipboard.getClass().getMethod("setPrimaryClip", clazz);
+                method.invoke(clipboard, clip);
+            }
+        } catch (Exception e) {
+            Log.e("ProjectsException", "There was and error copying the text to the clipboard: "
+                    + e.getMessage());
+        }
+    }
+
+    /**
+     * Wrapper around ClipboardManager based on Android version using Reflection API
+     * 
+     * @param context
+     * @param text
+     */
+    public static CharSequence getClipboardText(Context context) {
+        Object clipboard = context.getSystemService(Context.CLIPBOARD_SERVICE);
+        try {
+            if ("android.text.ClipboardManager".equals(clipboard.getClass().getName())) {
+                // CharSequence text = clipboard.getText();
+                Method method = clipboard.getClass().getMethod("getText");
+                Object text = method.invoke(clipboard);
+
+                return (CharSequence) text;
+            } else if ("android.content.ClipboardManager".equals(clipboard.getClass().getName())) {
+                // ClipData clipData = clipboard.getPrimaryClip();
+                Method methodGetPrimaryClip = clipboard.getClass().getMethod("getPrimaryClip");
+                Object clipData = methodGetPrimaryClip.invoke(clipboard);
+
+                // ClipData.Item clipDataItem = clipData.getItemAt(0);
+                Method methodGetItemAt = clipData.getClass().getMethod("getItemAt", Integer.TYPE);
+                Object clipDataItem = methodGetItemAt.invoke(clipData, 0);
+
+                // CharSequence text = clipDataItem.coerceToText(context);
+                Method methodGetString = clipDataItem.getClass().getMethod("coerceToText",
+                        Context.class);
+                Object text = methodGetString.invoke(clipDataItem, context);
+
+                return (CharSequence) text;
+            } else {
+                return null;
+            }
+        } catch (Exception e) {
+            Log.e("ProjectsException", "There was and error getting the text from the clipboard: "
+                    + e.getMessage());
+
+            return null;
+        }
+    }
+}

org_apg/src/org/thialfihar/android/apg/util/Constants.java

@@ -0,0 +1,6 @@
+package org.thialfihar.android.apg.util;
+
+public class Constants {
+    public static final String TAG = "APG";
+
+}

org_apg/src/org/thialfihar/android/apg/util/IterableIterator.java

@@ -0,0 +1,31 @@
+/*
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.util;
+
+import java.util.Iterator;
+
+public class IterableIterator<T> implements Iterable<T> {
+    private Iterator<T> mIter;
+
+    public IterableIterator(Iterator<T> iter) {
+        mIter = iter;
+    }
+
+    public Iterator<T> iterator() {
+        return mIter;
+    }
+}

org_apg/src/org/thialfihar/android/apg/util/Utils.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.thialfihar.android.apg.util;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
+
+import android.content.Context;
+
+public class Utils {
+
+    /**
+     * Reads html files from /res/raw/example.html to output them as string. See
+     * http://www.monocube.com/2011/02/08/android-tutorial-html-file-in-webview/
+     * 
+     * @param context
+     *            current context
+     * @param resourceID
+     *            of html file to read
+     * @return content of html file with formatting
+     */
+    public static String readContentFromResource(Context context, int resourceID) {
+        InputStream raw = context.getResources().openRawResource(resourceID);
+        ByteArrayOutputStream stream = new ByteArrayOutputStream();
+        int i;
+        try {
+            i = raw.read();
+            while (i != -1) {
+                stream.write(i);
+                i = raw.read();
+            }
+            raw.close();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return stream.toString();
+    }
+
+    /**
+     * Return the number if days between two dates
+     * 
+     * @param first
+     * @param second
+     * @return number of days
+     */
+    public static long getNumDaysBetween(GregorianCalendar first, GregorianCalendar second) {
+        GregorianCalendar tmp = new GregorianCalendar();
+        tmp.setTime(first.getTime());
+        long numDays = (second.getTimeInMillis() - first.getTimeInMillis()) / 1000 / 86400;
+        tmp.add(Calendar.DAY_OF_MONTH, (int) numDays);
+        while (tmp.before(second)) {
+            tmp.add(Calendar.DAY_OF_MONTH, 1);
+            ++numDays;
+        }
+        return numDays;
+    }
+
+}