1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
|
/*
* 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.sufficientlysecure.keychain.ui.dialog;
import org.spongycastle.openpgp.PGPException;
import org.spongycastle.openpgp.PGPPrivateKey;
import org.spongycastle.openpgp.PGPSecretKey;
import org.spongycastle.openpgp.operator.PBESecretKeyDecryptor;
import org.spongycastle.openpgp.operator.jcajce.JcePBESecretKeyDecryptorBuilder;
import org.sufficientlysecure.keychain.Constants;
import org.sufficientlysecure.keychain.Id;
import org.sufficientlysecure.keychain.helper.PgpHelper;
import org.sufficientlysecure.keychain.helper.PgpMain;
import org.sufficientlysecure.keychain.helper.PgpMain.PgpGeneralException;
import org.sufficientlysecure.keychain.provider.ProviderHelper;
import org.sufficientlysecure.keychain.service.PassphraseCacheService;
import org.sufficientlysecure.keychain.util.Log;
import org.sufficientlysecure.keychain.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.os.Bundle;
import android.os.Message;
import android.os.Messenger;
import android.os.RemoteException;
import android.support.v4.app.DialogFragment;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.View;
import android.view.WindowManager.LayoutParams;
import android.view.inputmethod.EditorInfo;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.TextView.OnEditorActionListener;
import android.widget.Toast;
public class PassphraseDialogFragment extends DialogFragment implements OnEditorActionListener {
private static final String ARG_MESSENGER = "messenger";
private static final String ARG_SECRET_KEY_ID = "secret_key_id";
public static final int MESSAGE_OKAY = 1;
private Messenger mMessenger;
private EditText mPassphraseEditText;
/**
* Creates new instance of this dialog fragment
*
* @param secretKeyId
* secret key id you want to use
* @param messenger
* to communicate back after caching the passphrase
* @return
* @throws PgpGeneralException
*/
public static PassphraseDialogFragment newInstance(Context context, Messenger messenger,
long secretKeyId) throws PgpGeneralException {
// check if secret key has a passphrase
if (!(secretKeyId == Id.key.symmetric || secretKeyId == Id.key.none)) {
if (!hasPassphrase(context, secretKeyId)) {
throw new PgpMain.PgpGeneralException("No passphrase! No passphrase dialog needed!");
}
}
PassphraseDialogFragment frag = new PassphraseDialogFragment();
Bundle args = new Bundle();
args.putLong(ARG_SECRET_KEY_ID, secretKeyId);
args.putParcelable(ARG_MESSENGER, messenger);
frag.setArguments(args);
return frag;
}
/**
* Checks if key has a passphrase
*
* @param secretKeyId
* @return true if it has a passphrase
*/
private static boolean hasPassphrase(Context context, long secretKeyId) {
// check if the key has no passphrase
try {
PGPSecretKey secretKey = PgpHelper.getMasterKey(ProviderHelper
.getPGPSecretKeyRingByKeyId(context, secretKeyId));
// PGPSecretKey secretKey =
// PGPHelper.getMasterKey(PGPMain.getSecretKeyRing(secretKeyId));
Log.d(Constants.TAG, "Check if key has no passphrase...");
PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder().setProvider(
"SC").build("".toCharArray());
PGPPrivateKey testKey = secretKey.extractPrivateKey(keyDecryptor);
if (testKey != null) {
Log.d(Constants.TAG, "Key has no passphrase! Caches empty passphrase!");
// cache empty passphrase
PassphraseCacheService.addCachedPassphrase(context, secretKey.getKeyID(), "");
return false;
}
} catch (PGPException e) {
// silently catch
}
return true;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
}
/**
* Creates dialog
*/
@Override
public Dialog onCreateDialog(Bundle savedInstanceState) {
final Activity activity = getActivity();
long secretKeyId = getArguments().getLong(ARG_SECRET_KEY_ID);
mMessenger = getArguments().getParcelable(ARG_MESSENGER);
AlertDialog.Builder alert = new AlertDialog.Builder(activity);
alert.setTitle(R.string.title_authentication);
final PGPSecretKey secretKey;
if (secretKeyId == Id.key.symmetric || secretKeyId == Id.key.none) {
secretKey = null;
alert.setMessage(R.string.passPhraseForSymmetricEncryption);
} else {
// TODO: by master key id???
secretKey = PgpHelper.getMasterKey(ProviderHelper.getPGPSecretKeyRingByMasterKeyId(
activity, secretKeyId));
// secretKey = PGPHelper.getMasterKey(PGPMain.getSecretKeyRing(secretKeyId));
if (secretKey == null) {
alert.setTitle(R.string.title_keyNotFound);
alert.setMessage(getString(R.string.keyNotFound, secretKeyId));
alert.setPositiveButton(android.R.string.ok, new OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dismiss();
}
});
alert.setCancelable(false);
return alert.create();
}
String userId = PgpHelper.getMainUserIdSafe(activity, secretKey);
Log.d(Constants.TAG, "User id: '" + userId + "'");
alert.setMessage(getString(R.string.passPhraseFor, userId));
}
LayoutInflater inflater = activity.getLayoutInflater();
View view = inflater.inflate(R.layout.passphrase, null);
alert.setView(view);
mPassphraseEditText = (EditText) view.findViewById(R.id.passphrase_passphrase);
alert.setPositiveButton(android.R.string.ok, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
dismiss();
String passPhrase = mPassphraseEditText.getText().toString();
long keyId;
if (secretKey != null) {
try {
PBESecretKeyDecryptor keyDecryptor = new JcePBESecretKeyDecryptorBuilder()
.setProvider(PgpMain.BOUNCY_CASTLE_PROVIDER_NAME).build(
passPhrase.toCharArray());
PGPPrivateKey testKey = secretKey.extractPrivateKey(keyDecryptor);
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;
}
// cache the new passphrase
Log.d(Constants.TAG, "Everything okay! Caching entered passphrase");
PassphraseCacheService.addCachedPassphrase(activity, keyId, passPhrase);
sendMessageToHandler(MESSAGE_OKAY);
}
});
alert.setNegativeButton(android.R.string.cancel, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int id) {
dismiss();
}
});
return alert.create();
}
@Override
public void onActivityCreated(Bundle arg0) {
super.onActivityCreated(arg0);
// request focus and open soft keyboard
mPassphraseEditText.requestFocus();
getDialog().getWindow().setSoftInputMode(LayoutParams.SOFT_INPUT_STATE_VISIBLE);
mPassphraseEditText.setOnEditorActionListener(this);
}
/**
* Associate the "done" button on the soft keyboard with the okay button in the view
*/
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (EditorInfo.IME_ACTION_DONE == actionId) {
AlertDialog dialog = ((AlertDialog) getDialog());
Button bt = dialog.getButton(AlertDialog.BUTTON_POSITIVE);
bt.performClick();
return true;
}
return false;
}
/**
* Send message back to handler which is initialized in a activity
*
* @param what
* Message integer you want to send
*/
private void sendMessageToHandler(Integer what) {
Message msg = Message.obtain();
msg.what = what;
try {
mMessenger.send(msg);
} catch (RemoteException e) {
Log.w(Constants.TAG, "Exception sending message, Is handler present?", e);
} catch (NullPointerException e) {
Log.w(Constants.TAG, "Messenger is null!", e);
}
}
}
|