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
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
|
package eu.siacs.conversations.crypto;
import android.app.PendingIntent;
import android.content.Intent;
import android.util.Log;
import org.openintents.openpgp.OpenPgpError;
import org.openintents.openpgp.OpenPgpSignatureResult;
import org.openintents.openpgp.util.OpenPgpApi;
import org.openintents.openpgp.util.OpenPgpApi.IOpenPgpCallback;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import eu.siacs.conversations.Config;
import eu.siacs.conversations.R;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.DownloadableFile;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.persistance.FileBackend;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.ui.UiCallback;
public class PgpEngine {
private OpenPgpApi api;
private XmppConnectionService mXmppConnectionService;
public PgpEngine(OpenPgpApi api, XmppConnectionService service) {
this.api = api;
this.mXmppConnectionService = service;
}
public void encrypt(final Message message, final UiCallback<Message> callback) {
Intent params = new Intent();
params.setAction(OpenPgpApi.ACTION_ENCRYPT);
final Conversation conversation = message.getConversation();
if (conversation.getMode() == Conversation.MODE_SINGLE) {
long[] keys = {
conversation.getContact().getPgpKeyId(),
conversation.getAccount().getPgpId()
};
params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, keys);
} else {
params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, conversation.getMucOptions().getPgpKeyIds());
}
if (!message.needsUploading()) {
params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
String body;
if (message.hasFileOnRemoteHost()) {
body = message.getFileParams().url.toString();
} else {
body = message.getBody();
}
InputStream is = new ByteArrayInputStream(body.getBytes());
final OutputStream os = new ByteArrayOutputStream();
api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
@Override
public void onReturn(Intent result) {
switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
OpenPgpApi.RESULT_CODE_ERROR)) {
case OpenPgpApi.RESULT_CODE_SUCCESS:
try {
os.flush();
StringBuilder encryptedMessageBody = new StringBuilder();
String[] lines = os.toString().split("\n");
for (int i = 2; i < lines.length - 1; ++i) {
if (!lines[i].contains("Version")) {
encryptedMessageBody.append(lines[i].trim());
}
}
message.setEncryptedBody(encryptedMessageBody
.toString());
callback.success(message);
} catch (IOException e) {
callback.error(R.string.openpgp_error, message);
}
break;
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
callback.userInputRequried((PendingIntent) result
.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
message);
break;
case OpenPgpApi.RESULT_CODE_ERROR:
logError(conversation.getAccount(), (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
callback.error(R.string.openpgp_error, message);
break;
}
}
});
} else {
try {
DownloadableFile inputFile = this.mXmppConnectionService
.getFileBackend().getFile(message, true);
DownloadableFile outputFile = this.mXmppConnectionService
.getFileBackend().getFile(message, false);
outputFile.getParentFile().mkdirs();
outputFile.createNewFile();
final InputStream is = new FileInputStream(inputFile);
final OutputStream os = new FileOutputStream(outputFile);
api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
@Override
public void onReturn(Intent result) {
switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
OpenPgpApi.RESULT_CODE_ERROR)) {
case OpenPgpApi.RESULT_CODE_SUCCESS:
try {
os.flush();
} catch (IOException ignored) {
//ignored
}
FileBackend.close(os);
callback.success(message);
break;
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
callback.userInputRequried(
(PendingIntent) result
.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
message);
break;
case OpenPgpApi.RESULT_CODE_ERROR:
logError(conversation.getAccount(), (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
callback.error(R.string.openpgp_error, message);
break;
}
}
});
} catch (final IOException e) {
callback.error(R.string.openpgp_error, message);
}
}
}
public long fetchKeyId(Account account, String status, String signature) {
if ((signature == null) || (api == null)) {
return 0;
}
if (status == null) {
status = "";
}
final StringBuilder pgpSig = new StringBuilder();
pgpSig.append("-----BEGIN PGP SIGNED MESSAGE-----");
pgpSig.append('\n');
pgpSig.append('\n');
pgpSig.append(status);
pgpSig.append('\n');
pgpSig.append("-----BEGIN PGP SIGNATURE-----");
pgpSig.append('\n');
pgpSig.append('\n');
pgpSig.append(signature.replace("\n", "").trim());
pgpSig.append('\n');
pgpSig.append("-----END PGP SIGNATURE-----");
Intent params = new Intent();
params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
InputStream is = new ByteArrayInputStream(pgpSig.toString().getBytes());
ByteArrayOutputStream os = new ByteArrayOutputStream();
Intent result = api.executeApi(params, is, os);
switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
OpenPgpApi.RESULT_CODE_ERROR)) {
case OpenPgpApi.RESULT_CODE_SUCCESS:
OpenPgpSignatureResult sigResult = result
.getParcelableExtra(OpenPgpApi.RESULT_SIGNATURE);
if (sigResult != null) {
return sigResult.getKeyId();
} else {
return 0;
}
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
return 0;
case OpenPgpApi.RESULT_CODE_ERROR:
logError(account, (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
return 0;
}
return 0;
}
public void chooseKey(final Account account, final UiCallback<Account> callback) {
Intent p = new Intent();
p.setAction(OpenPgpApi.ACTION_GET_SIGN_KEY_ID);
api.executeApiAsync(p, null, null, new IOpenPgpCallback() {
@Override
public void onReturn(Intent result) {
switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
case OpenPgpApi.RESULT_CODE_SUCCESS:
callback.success(account);
return;
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
callback.userInputRequried((PendingIntent) result
.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
account);
return;
case OpenPgpApi.RESULT_CODE_ERROR:
logError(account, (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
callback.error(R.string.openpgp_error, account);
}
}
});
}
public void generateSignature(final Account account, String status,
final UiCallback<Account> callback) {
if (account.getPgpId() == 0) {
return;
}
Intent params = new Intent();
params.setAction(OpenPgpApi.ACTION_CLEARTEXT_SIGN);
params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
params.putExtra(OpenPgpApi.EXTRA_SIGN_KEY_ID, account.getPgpId());
InputStream is = new ByteArrayInputStream(status.getBytes());
final OutputStream os = new ByteArrayOutputStream();
Log.d(Config.LOGTAG,account.getJid().toBareJid()+": signing status message \""+status+"\"");
api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
@Override
public void onReturn(Intent result) {
switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
case OpenPgpApi.RESULT_CODE_SUCCESS:
StringBuilder signatureBuilder = new StringBuilder();
try {
os.flush();
String[] lines = os.toString().split("\n");
boolean sig = false;
for (String line : lines) {
if (sig) {
if (line.contains("END PGP SIGNATURE")) {
sig = false;
} else {
if (!line.contains("Version")) {
signatureBuilder.append(line.trim());
}
}
}
if (line.contains("BEGIN PGP SIGNATURE")) {
sig = true;
}
}
} catch (IOException e) {
callback.error(R.string.openpgp_error, account);
return;
}
account.setPgpSignature(signatureBuilder.toString());
callback.success(account);
return;
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
callback.userInputRequried((PendingIntent) result
.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
account);
return;
case OpenPgpApi.RESULT_CODE_ERROR:
logError(account, (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
callback.error(R.string.unable_to_connect_to_keychain, account);
}
}
});
}
public void hasKey(final Contact contact, final UiCallback<Contact> callback) {
Intent params = new Intent();
params.setAction(OpenPgpApi.ACTION_GET_KEY);
params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
api.executeApiAsync(params, null, null, new IOpenPgpCallback() {
@Override
public void onReturn(Intent result) {
switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
case OpenPgpApi.RESULT_CODE_SUCCESS:
callback.success(contact);
return;
case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
callback.userInputRequried((PendingIntent) result
.getParcelableExtra(OpenPgpApi.RESULT_INTENT),
contact);
return;
case OpenPgpApi.RESULT_CODE_ERROR:
logError(contact.getAccount(), (OpenPgpError) result.getParcelableExtra(OpenPgpApi.RESULT_ERROR));
callback.error(R.string.openpgp_error, contact);
}
}
});
}
private static void logError(Account account, OpenPgpError error) {
if (error != null) {
Log.d(Config.LOGTAG,account.getJid().toBareJid().toString()+": OpenKeychain error '"+error.getMessage()+"' code="+error.getErrorId());
} else {
Log.d(Config.LOGTAG,account.getJid().toBareJid().toString()+": OpenKeychain error with no message");
}
}
public PendingIntent getIntentForKey(Contact contact) {
return getIntentForKey(contact.getPgpKeyId());
}
public PendingIntent getIntentForKey(long pgpKeyId) {
Intent params = new Intent();
params.setAction(OpenPgpApi.ACTION_GET_KEY);
params.putExtra(OpenPgpApi.EXTRA_KEY_ID, pgpKeyId);
Intent result = api.executeApi(params, null, null);
return (PendingIntent) result.getParcelableExtra(OpenPgpApi.RESULT_INTENT);
}
}
|
