initial commit of v0.8.0

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

@@ -0,0 +1,118 @@
+/*
+ * 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.bouncycastle2.jce.provider.BouncyCastleProvider;
+import org.bouncycastle2.openpgp.PGPException;
+import org.bouncycastle2.openpgp.PGPSecretKey;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.DialogInterface;
+import android.text.InputType;
+import android.text.method.PasswordTransformationMethod;
+import android.view.KeyEvent;
+import android.view.View;
+import android.view.View.OnKeyListener;
+import android.view.ViewGroup.LayoutParams;
+import android.widget.EditText;
+import android.widget.LinearLayout;
+import android.widget.Toast;
+
+public class AskForSecretKeyPassPhrase {
+    public static final int DIALOG_PASS_PHRASE = 12345;
+
+    public static interface PassPhraseCallbackInterface {
+        void passPhraseCallback(String passPhrase);
+    }
+
+    public static Dialog createDialog(Activity context, long secretKeyId,
+                                      PassPhraseCallbackInterface callback) {
+        AlertDialog.Builder alert = new AlertDialog.Builder(context);
+
+        final PGPSecretKey secretKey =
+                Apg.getMasterKey(Apg.findSecretKeyRing(secretKeyId));
+        if (secretKey == null) {
+            return null;
+        }
+
+        String userId = Apg.getMainUserIdSafe(context, secretKey);
+
+        alert.setTitle(R.string.title_authentification);
+        alert.setMessage("Pass phrase for " + userId);
+
+        final EditText input = new EditText(context);
+        input.setInputType(InputType.TYPE_TEXT_VARIATION_PASSWORD);
+        input.setTransformationMethod(new PasswordTransformationMethod());
+        input.setOnKeyListener(new OnKeyListener() {
+            public boolean onKey(View v, int keyCode, KeyEvent event) {
+                // If the event is a key-down event on the "enter" button
+                if (event.getAction() == KeyEvent.ACTION_DOWN &&
+                    keyCode == KeyEvent.KEYCODE_ENTER) {
+                    try {
+                        ((AlertDialog) v.getParent()).getButton(AlertDialog.BUTTON_POSITIVE)
+                                                     .performClick();
+                    } catch (ClassCastException e) {
+                        // don't do anything if we're not in that dialog
+                    }
+                    return true;
+                }
+                return false;
+            }
+        });
+        // 5dip padding
+        int padding = (int) (10 * context.getResources().getDisplayMetrics().densityDpi / 160);
+        LinearLayout layout = new LinearLayout(context);
+        layout.setPadding(padding, 0, padding, 0);
+        layout.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
+                                                LayoutParams.WRAP_CONTENT));
+        input.setLayoutParams(new LayoutParams(LayoutParams.FILL_PARENT,
+                                               LayoutParams.WRAP_CONTENT));
+        layout.addView(input);
+        alert.setView(layout);
+
+        final PassPhraseCallbackInterface cb = callback;
+        final Activity activity = context;
+        alert.setPositiveButton(android.R.string.ok,
+                                new DialogInterface.OnClickListener() {
+                                    public void onClick(DialogInterface dialog, int id) {
+                                        activity.removeDialog(DIALOG_PASS_PHRASE);
+                                        String passPhrase = "" + input.getText();
+                                        try {
+                                            secretKey.extractPrivateKey(passPhrase.toCharArray(),
+                                                                        new BouncyCastleProvider());
+                                        } catch (PGPException e) {
+                                            Toast.makeText(activity,
+                                                           R.string.wrong_pass_phrase,
+                                                           Toast.LENGTH_SHORT).show();
+                                            return;
+                                        }
+                                        cb.passPhraseCallback(passPhrase);
+                                    }
+                                });
+
+        alert.setNegativeButton(android.R.string.cancel,
+                                new DialogInterface.OnClickListener() {
+                                    public void onClick(DialogInterface dialog, int id) {
+                                        activity.removeDialog(DIALOG_PASS_PHRASE);
+                                    }
+                                });
+
+        return alert.create();
+    }
+}