1package eu.siacs.conversations.crypto;
2
3import java.io.ByteArrayInputStream;
4import java.io.ByteArrayOutputStream;
5import java.io.FileInputStream;
6import java.io.FileNotFoundException;
7import java.io.FileOutputStream;
8import java.io.IOException;
9import java.io.InputStream;
10import java.io.OutputStream;
11
12import org.openintents.openpgp.OpenPgpError;
13import org.openintents.openpgp.OpenPgpSignatureResult;
14import org.openintents.openpgp.util.OpenPgpApi;
15import org.openintents.openpgp.util.OpenPgpApi.IOpenPgpCallback;
16
17import eu.siacs.conversations.Config;
18import eu.siacs.conversations.R;
19import eu.siacs.conversations.entities.Account;
20import eu.siacs.conversations.entities.Contact;
21import eu.siacs.conversations.entities.Conversation;
22import eu.siacs.conversations.entities.Message;
23import eu.siacs.conversations.services.XmppConnectionService;
24import eu.siacs.conversations.ui.UiCallback;
25import eu.siacs.conversations.xmpp.jingle.JingleFile;
26import android.app.PendingIntent;
27import android.content.Intent;
28import android.graphics.BitmapFactory;
29import android.util.Log;
30
31public class PgpEngine {
32 private OpenPgpApi api;
33 private XmppConnectionService mXmppConnectionService;
34
35 public PgpEngine(OpenPgpApi api, XmppConnectionService service) {
36 this.api = api;
37 this.mXmppConnectionService = service;
38 }
39
40 public void decrypt(final Message message,
41 final UiCallback<Message> callback) {
42 Log.d(Config.LOGTAG, "decrypting message " + message.getUuid());
43 Intent params = new Intent();
44 params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
45 params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
46 .getConversation().getAccount().getJid());
47 if (message.getType() == Message.TYPE_TEXT) {
48 InputStream is = new ByteArrayInputStream(message.getBody()
49 .getBytes());
50 final OutputStream os = new ByteArrayOutputStream();
51 api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
52
53 @Override
54 public void onReturn(Intent result) {
55 switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
56 OpenPgpApi.RESULT_CODE_ERROR)) {
57 case OpenPgpApi.RESULT_CODE_SUCCESS:
58 try {
59 os.flush();
60 if (message.getEncryption() == Message.ENCRYPTION_PGP) {
61 message.setBody(os.toString());
62 message.setEncryption(Message.ENCRYPTION_DECRYPTED);
63 callback.success(message);
64 }
65 } catch (IOException e) {
66 callback.error(R.string.openpgp_error, message);
67 return;
68 }
69
70 return;
71 case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
72 callback.userInputRequried((PendingIntent) result
73 .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
74 message);
75 return;
76 case OpenPgpApi.RESULT_CODE_ERROR:
77 OpenPgpError error = result
78 .getParcelableExtra(OpenPgpApi.RESULT_ERROR);
79 Log.d(Config.LOGTAG, error.getMessage());
80 callback.error(R.string.openpgp_error, message);
81 return;
82 default:
83 return;
84 }
85 }
86 });
87 } else if (message.getType() == Message.TYPE_IMAGE) {
88 try {
89 final JingleFile inputFile = this.mXmppConnectionService
90 .getFileBackend().getJingleFile(message, false);
91 final JingleFile outputFile = this.mXmppConnectionService
92 .getFileBackend().getJingleFile(message, true);
93 outputFile.createNewFile();
94 InputStream is = new FileInputStream(inputFile);
95 OutputStream os = new FileOutputStream(outputFile);
96 api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
97
98 @Override
99 public void onReturn(Intent result) {
100 switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
101 OpenPgpApi.RESULT_CODE_ERROR)) {
102 case OpenPgpApi.RESULT_CODE_SUCCESS:
103 BitmapFactory.Options options = new BitmapFactory.Options();
104 options.inJustDecodeBounds = true;
105 BitmapFactory.decodeFile(
106 outputFile.getAbsolutePath(), options);
107 int imageHeight = options.outHeight;
108 int imageWidth = options.outWidth;
109 message.setBody(Long.toString(outputFile.getSize()) + ','
110 + imageWidth + ',' + imageHeight);
111 message.setEncryption(Message.ENCRYPTION_DECRYPTED);
112 PgpEngine.this.mXmppConnectionService
113 .updateMessage(message);
114 PgpEngine.this.mXmppConnectionService
115 .updateConversationUi();
116 callback.success(message);
117 return;
118 case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
119 callback.userInputRequried(
120 (PendingIntent) result
121 .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
122 message);
123 return;
124 case OpenPgpApi.RESULT_CODE_ERROR:
125 callback.error(R.string.openpgp_error, message);
126 return;
127 default:
128 return;
129 }
130 }
131 });
132 } catch (FileNotFoundException e) {
133 callback.error(R.string.error_decrypting_file, message);
134 } catch (IOException e) {
135 callback.error(R.string.error_decrypting_file, message);
136 }
137
138 }
139 }
140
141 public void encrypt(final Message message,
142 final UiCallback<Message> callback) {
143
144 Intent params = new Intent();
145 params.setAction(OpenPgpApi.ACTION_ENCRYPT);
146 if (message.getConversation().getMode() == Conversation.MODE_SINGLE) {
147 long[] keys = { message.getConversation().getContact()
148 .getPgpKeyId() };
149 params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, keys);
150 } else {
151 params.putExtra(OpenPgpApi.EXTRA_KEY_IDS, message.getConversation()
152 .getMucOptions().getPgpKeyIds());
153 }
154 params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, message
155 .getConversation().getAccount().getJid());
156
157 if (message.getType() == Message.TYPE_TEXT) {
158 params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
159
160 InputStream is = new ByteArrayInputStream(message.getBody()
161 .getBytes());
162 final OutputStream os = new ByteArrayOutputStream();
163 api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
164
165 @Override
166 public void onReturn(Intent result) {
167 switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
168 OpenPgpApi.RESULT_CODE_ERROR)) {
169 case OpenPgpApi.RESULT_CODE_SUCCESS:
170 try {
171 os.flush();
172 StringBuilder encryptedMessageBody = new StringBuilder();
173 String[] lines = os.toString().split("\n");
174 for (int i = 3; i < lines.length - 1; ++i) {
175 encryptedMessageBody.append(lines[i].trim());
176 }
177 message.setEncryptedBody(encryptedMessageBody
178 .toString());
179 callback.success(message);
180 } catch (IOException e) {
181 callback.error(R.string.openpgp_error, message);
182 }
183
184 break;
185 case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
186 callback.userInputRequried((PendingIntent) result
187 .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
188 message);
189 break;
190 case OpenPgpApi.RESULT_CODE_ERROR:
191 callback.error(R.string.openpgp_error, message);
192 break;
193 }
194 }
195 });
196 } else if (message.getType() == Message.TYPE_IMAGE) {
197 try {
198 JingleFile inputFile = this.mXmppConnectionService
199 .getFileBackend().getJingleFile(message, true);
200 JingleFile outputFile = this.mXmppConnectionService
201 .getFileBackend().getJingleFile(message, false);
202 outputFile.createNewFile();
203 InputStream is = new FileInputStream(inputFile);
204 OutputStream os = new FileOutputStream(outputFile);
205 api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
206
207 @Override
208 public void onReturn(Intent result) {
209 switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
210 OpenPgpApi.RESULT_CODE_ERROR)) {
211 case OpenPgpApi.RESULT_CODE_SUCCESS:
212 callback.success(message);
213 break;
214 case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
215 callback.userInputRequried(
216 (PendingIntent) result
217 .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
218 message);
219 break;
220 case OpenPgpApi.RESULT_CODE_ERROR:
221 callback.error(R.string.openpgp_error, message);
222 break;
223 }
224 }
225 });
226 } catch (FileNotFoundException e) {
227 Log.d(Config.LOGTAG, "file not found: " + e.getMessage());
228 } catch (IOException e) {
229 Log.d(Config.LOGTAG, "io exception during file encrypt");
230 }
231 }
232 }
233
234 public long fetchKeyId(Account account, String status, String signature) {
235 if ((signature == null) || (api == null)) {
236 return 0;
237 }
238 if (status == null) {
239 status = "";
240 }
241 StringBuilder pgpSig = new StringBuilder();
242 pgpSig.append("-----BEGIN PGP SIGNED MESSAGE-----");
243 pgpSig.append('\n');
244 pgpSig.append('\n');
245 pgpSig.append(status);
246 pgpSig.append('\n');
247 pgpSig.append("-----BEGIN PGP SIGNATURE-----");
248 pgpSig.append('\n');
249 pgpSig.append('\n');
250 pgpSig.append(signature.replace("\n", "").trim());
251 pgpSig.append('\n');
252 pgpSig.append("-----END PGP SIGNATURE-----");
253 Intent params = new Intent();
254 params.setAction(OpenPgpApi.ACTION_DECRYPT_VERIFY);
255 params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
256 params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
257 InputStream is = new ByteArrayInputStream(pgpSig.toString().getBytes());
258 ByteArrayOutputStream os = new ByteArrayOutputStream();
259 Intent result = api.executeApi(params, is, os);
260 switch (result.getIntExtra(OpenPgpApi.RESULT_CODE,
261 OpenPgpApi.RESULT_CODE_ERROR)) {
262 case OpenPgpApi.RESULT_CODE_SUCCESS:
263 OpenPgpSignatureResult sigResult = result
264 .getParcelableExtra(OpenPgpApi.RESULT_SIGNATURE);
265 if (sigResult != null) {
266 return sigResult.getKeyId();
267 } else {
268 return 0;
269 }
270 case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
271 return 0;
272 case OpenPgpApi.RESULT_CODE_ERROR:
273 Log.d(Config.LOGTAG,
274 "openpgp error: "
275 + ((OpenPgpError) result
276 .getParcelableExtra(OpenPgpApi.RESULT_ERROR))
277 .getMessage());
278 return 0;
279 }
280 return 0;
281 }
282
283 public void generateSignature(final Account account, String status,
284 final UiCallback<Account> callback) {
285 Intent params = new Intent();
286 params.putExtra(OpenPgpApi.EXTRA_REQUEST_ASCII_ARMOR, true);
287 params.setAction(OpenPgpApi.ACTION_SIGN);
288 params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
289 InputStream is = new ByteArrayInputStream(status.getBytes());
290 final OutputStream os = new ByteArrayOutputStream();
291 api.executeApiAsync(params, is, os, new IOpenPgpCallback() {
292
293 @Override
294 public void onReturn(Intent result) {
295 switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
296 case OpenPgpApi.RESULT_CODE_SUCCESS:
297 StringBuilder signatureBuilder = new StringBuilder();
298 try {
299 os.flush();
300 String[] lines = os.toString().split("\n");
301 boolean sig = false;
302 for(String line : lines) {
303 if (sig) {
304 if (line.contains("END PGP SIGNATURE")) {
305 sig = false;
306 } else {
307 signatureBuilder.append(line.trim());
308 }
309 }
310 if (line.contains("BEGIN PGP SIGNATURE")) {
311 sig = true;
312 }
313 }
314 } catch (IOException e) {
315 callback.error(R.string.openpgp_error, account);
316 return;
317 }
318 account.setKey("pgp_signature", signatureBuilder.toString());
319 callback.success(account);
320 return;
321 case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
322 callback.userInputRequried((PendingIntent) result
323 .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
324 account);
325 return;
326 case OpenPgpApi.RESULT_CODE_ERROR:
327 callback.error(R.string.openpgp_error, account);
328 return;
329 }
330 }
331 });
332 }
333
334 public void hasKey(final Contact contact, final UiCallback<Contact> callback) {
335 Intent params = new Intent();
336 params.setAction(OpenPgpApi.ACTION_GET_KEY);
337 params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
338 params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
339 .getJid());
340 api.executeApiAsync(params, null, null, new IOpenPgpCallback() {
341
342 @Override
343 public void onReturn(Intent result) {
344 switch (result.getIntExtra(OpenPgpApi.RESULT_CODE, 0)) {
345 case OpenPgpApi.RESULT_CODE_SUCCESS:
346 callback.success(contact);
347 return;
348 case OpenPgpApi.RESULT_CODE_USER_INTERACTION_REQUIRED:
349 callback.userInputRequried((PendingIntent) result
350 .getParcelableExtra(OpenPgpApi.RESULT_INTENT),
351 contact);
352 return;
353 case OpenPgpApi.RESULT_CODE_ERROR:
354 callback.error(R.string.openpgp_error, contact);
355 return;
356 }
357 }
358 });
359 }
360
361 public PendingIntent getIntentForKey(Contact contact) {
362 Intent params = new Intent();
363 params.setAction(OpenPgpApi.ACTION_GET_KEY);
364 params.putExtra(OpenPgpApi.EXTRA_KEY_ID, contact.getPgpKeyId());
365 params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, contact.getAccount()
366 .getJid());
367 Intent result = api.executeApi(params, null, null);
368 return (PendingIntent) result
369 .getParcelableExtra(OpenPgpApi.RESULT_INTENT);
370 }
371
372 public PendingIntent getIntentForKey(Account account, long pgpKeyId) {
373 Intent params = new Intent();
374 params.setAction(OpenPgpApi.ACTION_GET_KEY);
375 params.putExtra(OpenPgpApi.EXTRA_KEY_ID, pgpKeyId);
376 params.putExtra(OpenPgpApi.EXTRA_ACCOUNT_NAME, account.getJid());
377 Intent result = api.executeApi(params, null, null);
378 return (PendingIntent) result
379 .getParcelableExtra(OpenPgpApi.RESULT_INTENT);
380 }
381}