Renaming APG to OpenPGP Keychain

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/provider/KeychainServiceBlobProvider.java

@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ * 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.sufficientlysecure.keychain.provider;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.provider.KeychainServiceBlobContract.Blobs;
+import org.sufficientlysecure.keychain.provider.KeychainServiceBlobContract.BlobsColumns;
+import org.sufficientlysecure.keychain.util.Log;
+
+import android.content.ContentProvider;
+import android.content.ContentUris;
+import android.content.ContentValues;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
+import android.provider.BaseColumns;
+
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.util.List;
+import java.util.UUID;
+
+public class KeychainServiceBlobProvider extends ContentProvider {
+    private static final String STORE_PATH = Constants.path.APP_DIR + "/ApgBlobs";
+
+    private KeychainServiceBlobDatabase mBlobDatabase = null;
+
+    public KeychainServiceBlobProvider() {
+        File dir = new File(STORE_PATH);
+        dir.mkdirs();
+    }
+
+    @Override
+    public boolean onCreate() {
+        mBlobDatabase = new KeychainServiceBlobDatabase(getContext());
+        return true;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public Uri insert(Uri uri, ContentValues ignored) {
+        // 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(BlobsColumns.KEY, password);
+
+        SQLiteDatabase db = mBlobDatabase.getWritableDatabase();
+        long newRowId = db.insert(KeychainServiceBlobDatabase.TABLE, null, vals);
+        Uri insertedUri = ContentUris.withAppendedId(Blobs.CONTENT_URI, newRowId);
+
+        return Uri.withAppendedPath(insertedUri, password);
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public ParcelFileDescriptor openFile(Uri uri, String mode) throws SecurityException,
+            FileNotFoundException {
+        Log.d(Constants.TAG, "openFile() called with uri: " + uri.toString() + " and 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);
+
+        Log.d(Constants.TAG, "Got id: " + id + " and key: " + key);
+
+        // get the data
+        SQLiteDatabase db = mBlobDatabase.getReadableDatabase();
+        Cursor result = db.query(KeychainServiceBlobDatabase.TABLE, new String[] { BaseColumns._ID },
+                BaseColumns._ID + " = ? and " + BlobsColumns.KEY + " = ?",
+                new String[] { id, key }, null, null, null);
+
+        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")) {
+            Log.d(Constants.TAG, "Try to open file w");
+            if (!targetFile.exists()) {
+                try {
+                    targetFile.createNewFile();
+                } catch (IOException e) {
+                    Log.e(Constants.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")) {
+            Log.d(Constants.TAG, "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;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public String getType(Uri uri) {
+        return null;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public Cursor query(Uri uri, String[] projection, String selection, String[] selectionArgs,
+            String sortOrder) {
+        return null;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public int delete(Uri uri, String selection, String[] selectionArgs) {
+        return 0;
+    }
+
+    /** {@inheritDoc} */
+    @Override
+    public int update(Uri uri, ContentValues values, String selection, String[] selectionArgs) {
+        return 0;
+    }
+
+}