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/*
* 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();
}
}
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