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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.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();
}
}
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