1package eu.siacs.conversations.crypto.axolotl;
2
3import android.support.annotation.NonNull;
4import android.support.annotation.Nullable;
5import android.util.Log;
6
7import org.bouncycastle.jce.provider.BouncyCastleProvider;
8import org.whispersystems.libaxolotl.AxolotlAddress;
9import org.whispersystems.libaxolotl.IdentityKey;
10import org.whispersystems.libaxolotl.IdentityKeyPair;
11import org.whispersystems.libaxolotl.InvalidKeyException;
12import org.whispersystems.libaxolotl.InvalidKeyIdException;
13import org.whispersystems.libaxolotl.SessionBuilder;
14import org.whispersystems.libaxolotl.UntrustedIdentityException;
15import org.whispersystems.libaxolotl.ecc.ECPublicKey;
16import org.whispersystems.libaxolotl.state.PreKeyBundle;
17import org.whispersystems.libaxolotl.state.PreKeyRecord;
18import org.whispersystems.libaxolotl.state.SignedPreKeyRecord;
19import org.whispersystems.libaxolotl.util.KeyHelper;
20
21import java.security.Security;
22import java.util.Arrays;
23import java.util.HashMap;
24import java.util.HashSet;
25import java.util.List;
26import java.util.Map;
27import java.util.Random;
28import java.util.Set;
29
30import eu.siacs.conversations.Config;
31import eu.siacs.conversations.entities.Account;
32import eu.siacs.conversations.entities.Contact;
33import eu.siacs.conversations.entities.Conversation;
34import eu.siacs.conversations.entities.Message;
35import eu.siacs.conversations.parser.IqParser;
36import eu.siacs.conversations.services.XmppConnectionService;
37import eu.siacs.conversations.utils.SerialSingleThreadExecutor;
38import eu.siacs.conversations.xml.Element;
39import eu.siacs.conversations.xmpp.OnIqPacketReceived;
40import eu.siacs.conversations.xmpp.jid.InvalidJidException;
41import eu.siacs.conversations.xmpp.jid.Jid;
42import eu.siacs.conversations.xmpp.stanzas.IqPacket;
43
44public class AxolotlService {
45
46 public static final String PEP_PREFIX = "eu.siacs.conversations.axolotl";
47 public static final String PEP_DEVICE_LIST = PEP_PREFIX + ".devicelist";
48 public static final String PEP_BUNDLES = PEP_PREFIX + ".bundles";
49
50 public static final String LOGPREFIX = "AxolotlService";
51
52 public static final int NUM_KEYS_TO_PUBLISH = 10;
53
54 private final Account account;
55 private final XmppConnectionService mXmppConnectionService;
56 private final SQLiteAxolotlStore axolotlStore;
57 private final SessionMap sessions;
58 private final Map<Jid, Set<Integer>> deviceIds;
59 private final Map<String, XmppAxolotlMessage> messageCache;
60 private final FetchStatusMap fetchStatusMap;
61 private final SerialSingleThreadExecutor executor;
62
63 private static class AxolotlAddressMap<T> {
64 protected Map<String, Map<Integer, T>> map;
65 protected final Object MAP_LOCK = new Object();
66
67 public AxolotlAddressMap() {
68 this.map = new HashMap<>();
69 }
70
71 public void put(AxolotlAddress address, T value) {
72 synchronized (MAP_LOCK) {
73 Map<Integer, T> devices = map.get(address.getName());
74 if (devices == null) {
75 devices = new HashMap<>();
76 map.put(address.getName(), devices);
77 }
78 devices.put(address.getDeviceId(), value);
79 }
80 }
81
82 public T get(AxolotlAddress address) {
83 synchronized (MAP_LOCK) {
84 Map<Integer, T> devices = map.get(address.getName());
85 if (devices == null) {
86 return null;
87 }
88 return devices.get(address.getDeviceId());
89 }
90 }
91
92 public Map<Integer, T> getAll(AxolotlAddress address) {
93 synchronized (MAP_LOCK) {
94 Map<Integer, T> devices = map.get(address.getName());
95 if (devices == null) {
96 return new HashMap<>();
97 }
98 return devices;
99 }
100 }
101
102 public boolean hasAny(AxolotlAddress address) {
103 synchronized (MAP_LOCK) {
104 Map<Integer, T> devices = map.get(address.getName());
105 return devices != null && !devices.isEmpty();
106 }
107 }
108
109 public void clear() {
110 map.clear();
111 }
112
113 }
114
115 private static class SessionMap extends AxolotlAddressMap<XmppAxolotlSession> {
116 private final XmppConnectionService xmppConnectionService;
117 private final Account account;
118
119 public SessionMap(XmppConnectionService service, SQLiteAxolotlStore store, Account account) {
120 super();
121 this.xmppConnectionService = service;
122 this.account = account;
123 this.fillMap(store);
124 }
125
126 private void putDevicesForJid(String bareJid, List<Integer> deviceIds, SQLiteAxolotlStore store) {
127 for (Integer deviceId : deviceIds) {
128 AxolotlAddress axolotlAddress = new AxolotlAddress(bareJid, deviceId);
129 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Building session for remote address: " + axolotlAddress.toString());
130 String fingerprint = store.loadSession(axolotlAddress).getSessionState().getRemoteIdentityKey().getFingerprint().replaceAll("\\s", "");
131 this.put(axolotlAddress, new XmppAxolotlSession(account, store, axolotlAddress, fingerprint));
132 }
133 }
134
135 private void fillMap(SQLiteAxolotlStore store) {
136 List<Integer> deviceIds = store.getSubDeviceSessions(account.getJid().toBareJid().toString());
137 putDevicesForJid(account.getJid().toBareJid().toString(), deviceIds, store);
138 for (Contact contact : account.getRoster().getContacts()) {
139 Jid bareJid = contact.getJid().toBareJid();
140 if (bareJid == null) {
141 continue; // FIXME: handle this?
142 }
143 String address = bareJid.toString();
144 deviceIds = store.getSubDeviceSessions(address);
145 putDevicesForJid(address, deviceIds, store);
146 }
147
148 }
149
150 @Override
151 public void put(AxolotlAddress address, XmppAxolotlSession value) {
152 super.put(address, value);
153 value.setNotFresh();
154 xmppConnectionService.syncRosterToDisk(account);
155 }
156
157 public void put(XmppAxolotlSession session) {
158 this.put(session.getRemoteAddress(), session);
159 }
160 }
161
162 private static enum FetchStatus {
163 PENDING,
164 SUCCESS,
165 ERROR
166 }
167
168 private static class FetchStatusMap extends AxolotlAddressMap<FetchStatus> {
169
170 }
171
172 public static String getLogprefix(Account account) {
173 return LOGPREFIX + " (" + account.getJid().toBareJid().toString() + "): ";
174 }
175
176 public AxolotlService(Account account, XmppConnectionService connectionService) {
177 if (Security.getProvider("BC") == null) {
178 Security.addProvider(new BouncyCastleProvider());
179 }
180 this.mXmppConnectionService = connectionService;
181 this.account = account;
182 this.axolotlStore = new SQLiteAxolotlStore(this.account, this.mXmppConnectionService);
183 this.deviceIds = new HashMap<>();
184 this.messageCache = new HashMap<>();
185 this.sessions = new SessionMap(mXmppConnectionService, axolotlStore, account);
186 this.fetchStatusMap = new FetchStatusMap();
187 this.executor = new SerialSingleThreadExecutor();
188 }
189
190 public IdentityKey getOwnPublicKey() {
191 return axolotlStore.getIdentityKeyPair().getPublicKey();
192 }
193
194 public Set<IdentityKey> getKeysWithTrust(SQLiteAxolotlStore.Trust trust) {
195 return axolotlStore.getContactKeysWithTrust(account.getJid().toBareJid().toString(), trust);
196 }
197
198 public Set<IdentityKey> getKeysWithTrust(SQLiteAxolotlStore.Trust trust, Contact contact) {
199 return axolotlStore.getContactKeysWithTrust(contact.getJid().toBareJid().toString(), trust);
200 }
201
202 public long getNumTrustedKeys(Contact contact) {
203 return axolotlStore.getContactNumTrustedKeys(contact.getJid().toBareJid().toString());
204 }
205
206 private AxolotlAddress getAddressForJid(Jid jid) {
207 return new AxolotlAddress(jid.toString(), 0);
208 }
209
210 private Set<XmppAxolotlSession> findOwnSessions() {
211 AxolotlAddress ownAddress = getAddressForJid(account.getJid().toBareJid());
212 Set<XmppAxolotlSession> ownDeviceSessions = new HashSet<>(this.sessions.getAll(ownAddress).values());
213 return ownDeviceSessions;
214 }
215
216 private Set<XmppAxolotlSession> findSessionsforContact(Contact contact) {
217 AxolotlAddress contactAddress = getAddressForJid(contact.getJid());
218 Set<XmppAxolotlSession> sessions = new HashSet<>(this.sessions.getAll(contactAddress).values());
219 return sessions;
220 }
221
222 private boolean hasAny(Contact contact) {
223 AxolotlAddress contactAddress = getAddressForJid(contact.getJid());
224 return sessions.hasAny(contactAddress);
225 }
226
227 public void regenerateKeys() {
228 axolotlStore.regenerate();
229 sessions.clear();
230 fetchStatusMap.clear();
231 publishBundlesIfNeeded();
232 publishOwnDeviceIdIfNeeded();
233 }
234
235 public int getOwnDeviceId() {
236 return axolotlStore.getLocalRegistrationId();
237 }
238
239 public Set<Integer> getOwnDeviceIds() {
240 return this.deviceIds.get(account.getJid().toBareJid());
241 }
242
243 private void setTrustOnSessions(final Jid jid, @NonNull final Set<Integer> deviceIds,
244 final SQLiteAxolotlStore.Trust from,
245 final SQLiteAxolotlStore.Trust to) {
246 for (Integer deviceId : deviceIds) {
247 AxolotlAddress address = new AxolotlAddress(jid.toBareJid().toString(), deviceId);
248 XmppAxolotlSession session = sessions.get(address);
249 if (session != null && session.getFingerprint() != null
250 && session.getTrust() == from) {
251 session.setTrust(to);
252 }
253 }
254 }
255
256 public void registerDevices(final Jid jid, @NonNull final Set<Integer> deviceIds) {
257 if (jid.toBareJid().equals(account.getJid().toBareJid())) {
258 if (deviceIds.contains(getOwnDeviceId())) {
259 deviceIds.remove(getOwnDeviceId());
260 }
261 for (Integer deviceId : deviceIds) {
262 AxolotlAddress ownDeviceAddress = new AxolotlAddress(jid.toBareJid().toString(), deviceId);
263 if (sessions.get(ownDeviceAddress) == null) {
264 buildSessionFromPEP(ownDeviceAddress);
265 }
266 }
267 }
268 Set<Integer> expiredDevices = new HashSet<>(axolotlStore.getSubDeviceSessions(jid.toBareJid().toString()));
269 expiredDevices.removeAll(deviceIds);
270 setTrustOnSessions(jid, expiredDevices, SQLiteAxolotlStore.Trust.TRUSTED,
271 SQLiteAxolotlStore.Trust.INACTIVE);
272 Set<Integer> newDevices = new HashSet<>(deviceIds);
273 setTrustOnSessions(jid, newDevices, SQLiteAxolotlStore.Trust.INACTIVE,
274 SQLiteAxolotlStore.Trust.TRUSTED);
275 this.deviceIds.put(jid, deviceIds);
276 mXmppConnectionService.keyStatusUpdated();
277 publishOwnDeviceIdIfNeeded();
278 }
279
280 public void wipeOtherPepDevices() {
281 Set<Integer> deviceIds = new HashSet<>();
282 deviceIds.add(getOwnDeviceId());
283 IqPacket publish = mXmppConnectionService.getIqGenerator().publishDeviceIds(deviceIds);
284 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Wiping all other devices from Pep:" + publish);
285 mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() {
286 @Override
287 public void onIqPacketReceived(Account account, IqPacket packet) {
288 // TODO: implement this!
289 }
290 });
291 }
292
293 public void purgeKey(IdentityKey identityKey) {
294 axolotlStore.setFingerprintTrust(identityKey.getFingerprint().replaceAll("\\s", ""), SQLiteAxolotlStore.Trust.COMPROMISED);
295 }
296
297 public void publishOwnDeviceIdIfNeeded() {
298 IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveDeviceIds(account.getJid().toBareJid());
299 mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
300 @Override
301 public void onIqPacketReceived(Account account, IqPacket packet) {
302 Element item = mXmppConnectionService.getIqParser().getItem(packet);
303 Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
304 if (deviceIds == null) {
305 deviceIds = new HashSet<Integer>();
306 }
307 if (!deviceIds.contains(getOwnDeviceId())) {
308 deviceIds.add(getOwnDeviceId());
309 IqPacket publish = mXmppConnectionService.getIqGenerator().publishDeviceIds(deviceIds);
310 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Own device " + getOwnDeviceId() + " not in PEP devicelist. Publishing: " + publish);
311 mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() {
312 @Override
313 public void onIqPacketReceived(Account account, IqPacket packet) {
314 // TODO: implement this!
315 }
316 });
317 }
318 }
319 });
320 }
321
322 public void publishBundlesIfNeeded() {
323 IqPacket packet = mXmppConnectionService.getIqGenerator().retrieveBundlesForDevice(account.getJid().toBareJid(), getOwnDeviceId());
324 mXmppConnectionService.sendIqPacket(account, packet, new OnIqPacketReceived() {
325 @Override
326 public void onIqPacketReceived(Account account, IqPacket packet) {
327 PreKeyBundle bundle = mXmppConnectionService.getIqParser().bundle(packet);
328 Map<Integer, ECPublicKey> keys = mXmppConnectionService.getIqParser().preKeyPublics(packet);
329 boolean flush = false;
330 if (bundle == null) {
331 Log.w(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Received invalid bundle:" + packet);
332 bundle = new PreKeyBundle(-1, -1, -1, null, -1, null, null, null);
333 flush = true;
334 }
335 if (keys == null) {
336 Log.w(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Received invalid prekeys:" + packet);
337 }
338 try {
339 boolean changed = false;
340 // Validate IdentityKey
341 IdentityKeyPair identityKeyPair = axolotlStore.getIdentityKeyPair();
342 if (flush || !identityKeyPair.getPublicKey().equals(bundle.getIdentityKey())) {
343 Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Adding own IdentityKey " + identityKeyPair.getPublicKey() + " to PEP.");
344 changed = true;
345 }
346
347 // Validate signedPreKeyRecord + ID
348 SignedPreKeyRecord signedPreKeyRecord;
349 int numSignedPreKeys = axolotlStore.loadSignedPreKeys().size();
350 try {
351 signedPreKeyRecord = axolotlStore.loadSignedPreKey(bundle.getSignedPreKeyId());
352 if (flush
353 || !bundle.getSignedPreKey().equals(signedPreKeyRecord.getKeyPair().getPublicKey())
354 || !Arrays.equals(bundle.getSignedPreKeySignature(), signedPreKeyRecord.getSignature())) {
355 Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Adding new signedPreKey with ID " + (numSignedPreKeys + 1) + " to PEP.");
356 signedPreKeyRecord = KeyHelper.generateSignedPreKey(identityKeyPair, numSignedPreKeys + 1);
357 axolotlStore.storeSignedPreKey(signedPreKeyRecord.getId(), signedPreKeyRecord);
358 changed = true;
359 }
360 } catch (InvalidKeyIdException e) {
361 Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Adding new signedPreKey with ID " + (numSignedPreKeys + 1) + " to PEP.");
362 signedPreKeyRecord = KeyHelper.generateSignedPreKey(identityKeyPair, numSignedPreKeys + 1);
363 axolotlStore.storeSignedPreKey(signedPreKeyRecord.getId(), signedPreKeyRecord);
364 changed = true;
365 }
366
367 // Validate PreKeys
368 Set<PreKeyRecord> preKeyRecords = new HashSet<>();
369 if (keys != null) {
370 for (Integer id : keys.keySet()) {
371 try {
372 PreKeyRecord preKeyRecord = axolotlStore.loadPreKey(id);
373 if (preKeyRecord.getKeyPair().getPublicKey().equals(keys.get(id))) {
374 preKeyRecords.add(preKeyRecord);
375 }
376 } catch (InvalidKeyIdException ignored) {
377 }
378 }
379 }
380 int newKeys = NUM_KEYS_TO_PUBLISH - preKeyRecords.size();
381 if (newKeys > 0) {
382 List<PreKeyRecord> newRecords = KeyHelper.generatePreKeys(
383 axolotlStore.getCurrentPreKeyId() + 1, newKeys);
384 preKeyRecords.addAll(newRecords);
385 for (PreKeyRecord record : newRecords) {
386 axolotlStore.storePreKey(record.getId(), record);
387 }
388 changed = true;
389 Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Adding " + newKeys + " new preKeys to PEP.");
390 }
391
392
393 if (changed) {
394 IqPacket publish = mXmppConnectionService.getIqGenerator().publishBundles(
395 signedPreKeyRecord, axolotlStore.getIdentityKeyPair().getPublicKey(),
396 preKeyRecords, getOwnDeviceId());
397 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + ": Bundle " + getOwnDeviceId() + " in PEP not current. Publishing: " + publish);
398 mXmppConnectionService.sendIqPacket(account, publish, new OnIqPacketReceived() {
399 @Override
400 public void onIqPacketReceived(Account account, IqPacket packet) {
401 // TODO: implement this!
402 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Published bundle, got: " + packet);
403 }
404 });
405 }
406 } catch (InvalidKeyException e) {
407 Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Failed to publish bundle " + getOwnDeviceId() + ", reason: " + e.getMessage());
408 return;
409 }
410 }
411 });
412 }
413
414 public boolean isContactAxolotlCapable(Contact contact) {
415
416 Jid jid = contact.getJid().toBareJid();
417 AxolotlAddress address = new AxolotlAddress(jid.toString(), 0);
418 return sessions.hasAny(address) ||
419 (deviceIds.containsKey(jid) && !deviceIds.get(jid).isEmpty());
420 }
421
422 public SQLiteAxolotlStore.Trust getFingerprintTrust(String fingerprint) {
423 return axolotlStore.getFingerprintTrust(fingerprint);
424 }
425
426 public void setFingerprintTrust(String fingerprint, SQLiteAxolotlStore.Trust trust) {
427 axolotlStore.setFingerprintTrust(fingerprint, trust);
428 }
429
430 private void buildSessionFromPEP(final AxolotlAddress address) {
431 Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Building new sesstion for " + address.getDeviceId());
432
433 try {
434 IqPacket bundlesPacket = mXmppConnectionService.getIqGenerator().retrieveBundlesForDevice(
435 Jid.fromString(address.getName()), address.getDeviceId());
436 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Retrieving bundle: " + bundlesPacket);
437 mXmppConnectionService.sendIqPacket(account, bundlesPacket, new OnIqPacketReceived() {
438 private void finish() {
439 AxolotlAddress ownAddress = new AxolotlAddress(account.getJid().toBareJid().toString(), 0);
440 if (!fetchStatusMap.getAll(ownAddress).containsValue(FetchStatus.PENDING)
441 && !fetchStatusMap.getAll(address).containsValue(FetchStatus.PENDING)) {
442 mXmppConnectionService.keyStatusUpdated();
443 }
444 }
445
446 @Override
447 public void onIqPacketReceived(Account account, IqPacket packet) {
448 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Received preKey IQ packet, processing...");
449 final IqParser parser = mXmppConnectionService.getIqParser();
450 final List<PreKeyBundle> preKeyBundleList = parser.preKeys(packet);
451 final PreKeyBundle bundle = parser.bundle(packet);
452 if (preKeyBundleList.isEmpty() || bundle == null) {
453 Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "preKey IQ packet invalid: " + packet);
454 fetchStatusMap.put(address, FetchStatus.ERROR);
455 finish();
456 return;
457 }
458 Random random = new Random();
459 final PreKeyBundle preKey = preKeyBundleList.get(random.nextInt(preKeyBundleList.size()));
460 if (preKey == null) {
461 //should never happen
462 fetchStatusMap.put(address, FetchStatus.ERROR);
463 finish();
464 return;
465 }
466
467 final PreKeyBundle preKeyBundle = new PreKeyBundle(0, address.getDeviceId(),
468 preKey.getPreKeyId(), preKey.getPreKey(),
469 bundle.getSignedPreKeyId(), bundle.getSignedPreKey(),
470 bundle.getSignedPreKeySignature(), bundle.getIdentityKey());
471
472 axolotlStore.saveIdentity(address.getName(), bundle.getIdentityKey());
473
474 try {
475 SessionBuilder builder = new SessionBuilder(axolotlStore, address);
476 builder.process(preKeyBundle);
477 XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, bundle.getIdentityKey().getFingerprint().replaceAll("\\s", ""));
478 sessions.put(address, session);
479 fetchStatusMap.put(address, FetchStatus.SUCCESS);
480 } catch (UntrustedIdentityException | InvalidKeyException e) {
481 Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Error building session for " + address + ": "
482 + e.getClass().getName() + ", " + e.getMessage());
483 fetchStatusMap.put(address, FetchStatus.ERROR);
484 }
485
486 finish();
487 }
488 });
489 } catch (InvalidJidException e) {
490 Log.e(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Got address with invalid jid: " + address.getName());
491 }
492 }
493
494 public Set<AxolotlAddress> findDevicesWithoutSession(final Conversation conversation) {
495 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Finding devices without session for " + conversation.getContact().getJid().toBareJid());
496 Jid contactJid = conversation.getContact().getJid().toBareJid();
497 Set<AxolotlAddress> addresses = new HashSet<>();
498 if (deviceIds.get(contactJid) != null) {
499 for (Integer foreignId : this.deviceIds.get(contactJid)) {
500 AxolotlAddress address = new AxolotlAddress(contactJid.toString(), foreignId);
501 if (sessions.get(address) == null) {
502 IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey();
503 if (identityKey != null) {
504 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Already have session for " + address.toString() + ", adding to cache...");
505 XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, identityKey.getFingerprint().replaceAll("\\s", ""));
506 sessions.put(address, session);
507 } else {
508 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Found device " + account.getJid().toBareJid() + ":" + foreignId);
509 addresses.add(new AxolotlAddress(contactJid.toString(), foreignId));
510 }
511 }
512 }
513 } else {
514 Log.w(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Have no target devices in PEP!");
515 }
516 if (deviceIds.get(account.getJid().toBareJid()) != null) {
517 for (Integer ownId : this.deviceIds.get(account.getJid().toBareJid())) {
518 AxolotlAddress address = new AxolotlAddress(account.getJid().toBareJid().toString(), ownId);
519 if (sessions.get(address) == null) {
520 IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey();
521 if (identityKey != null) {
522 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Already have session for " + address.toString() + ", adding to cache...");
523 XmppAxolotlSession session = new XmppAxolotlSession(account, axolotlStore, address, identityKey.getFingerprint().replaceAll("\\s", ""));
524 sessions.put(address, session);
525 } else {
526 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Found device " + account.getJid().toBareJid() + ":" + ownId);
527 addresses.add(new AxolotlAddress(account.getJid().toBareJid().toString(), ownId));
528 }
529 }
530 }
531 }
532
533 return addresses;
534 }
535
536 public boolean createSessionsIfNeeded(final Conversation conversation) {
537 Log.i(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Creating axolotl sessions if needed...");
538 boolean newSessions = false;
539 Set<AxolotlAddress> addresses = findDevicesWithoutSession(conversation);
540 for (AxolotlAddress address : addresses) {
541 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Processing device: " + address.toString());
542 FetchStatus status = fetchStatusMap.get(address);
543 if (status == null || status == FetchStatus.ERROR) {
544 fetchStatusMap.put(address, FetchStatus.PENDING);
545 this.buildSessionFromPEP(address);
546 newSessions = true;
547 } else if (status == FetchStatus.PENDING) {
548 newSessions = true;
549 } else {
550 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Already fetching bundle for " + address.toString());
551 }
552 }
553
554 return newSessions;
555 }
556
557 public boolean hasPendingKeyFetches(Conversation conversation) {
558 AxolotlAddress ownAddress = new AxolotlAddress(account.getJid().toBareJid().toString(), 0);
559 AxolotlAddress foreignAddress = new AxolotlAddress(conversation.getJid().toBareJid().toString(), 0);
560 return fetchStatusMap.getAll(ownAddress).containsValue(FetchStatus.PENDING)
561 || fetchStatusMap.getAll(foreignAddress).containsValue(FetchStatus.PENDING);
562
563 }
564
565 @Nullable
566 private XmppAxolotlMessage buildHeader(Contact contact) {
567 final XmppAxolotlMessage axolotlMessage = new XmppAxolotlMessage(
568 contact.getJid().toBareJid(), getOwnDeviceId());
569
570 Set<XmppAxolotlSession> contactSessions = findSessionsforContact(contact);
571 Set<XmppAxolotlSession> ownSessions = findOwnSessions();
572 if (contactSessions.isEmpty()) {
573 return null;
574 }
575 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Building axolotl foreign keyElements...");
576 for (XmppAxolotlSession session : contactSessions) {
577 Log.v(Config.LOGTAG, AxolotlService.getLogprefix(account) + session.getRemoteAddress().toString());
578 axolotlMessage.addDevice(session);
579 }
580 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Building axolotl own keyElements...");
581 for (XmppAxolotlSession session : ownSessions) {
582 Log.v(Config.LOGTAG, AxolotlService.getLogprefix(account) + session.getRemoteAddress().toString());
583 axolotlMessage.addDevice(session);
584 }
585
586 return axolotlMessage;
587 }
588
589 @Nullable
590 public XmppAxolotlMessage encrypt(Message message) {
591 XmppAxolotlMessage axolotlMessage = buildHeader(message.getContact());
592
593 if (axolotlMessage != null) {
594 final String content;
595 if (message.hasFileOnRemoteHost()) {
596 content = message.getFileParams().url.toString();
597 } else {
598 content = message.getBody();
599 }
600 try {
601 axolotlMessage.encrypt(content);
602 } catch (CryptoFailedException e) {
603 Log.w(Config.LOGTAG, getLogprefix(account) + "Failed to encrypt message: " + e.getMessage());
604 return null;
605 }
606 }
607
608 return axolotlMessage;
609 }
610
611 public void preparePayloadMessage(final Message message, final boolean delay) {
612 executor.execute(new Runnable() {
613 @Override
614 public void run() {
615 XmppAxolotlMessage axolotlMessage = encrypt(message);
616 if (axolotlMessage == null) {
617 mXmppConnectionService.markMessage(message, Message.STATUS_SEND_FAILED);
618 //mXmppConnectionService.updateConversationUi();
619 } else {
620 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Generated message, caching: " + message.getUuid());
621 messageCache.put(message.getUuid(), axolotlMessage);
622 mXmppConnectionService.resendMessage(message, delay);
623 }
624 }
625 });
626 }
627
628 public void prepareKeyTransportMessage(final Contact contact, final OnMessageCreatedCallback onMessageCreatedCallback) {
629 executor.execute(new Runnable() {
630 @Override
631 public void run() {
632 XmppAxolotlMessage axolotlMessage = buildHeader(contact);
633 onMessageCreatedCallback.run(axolotlMessage);
634 }
635 });
636 }
637
638 public XmppAxolotlMessage fetchAxolotlMessageFromCache(Message message) {
639 XmppAxolotlMessage axolotlMessage = messageCache.get(message.getUuid());
640 if (axolotlMessage != null) {
641 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Cache hit: " + message.getUuid());
642 messageCache.remove(message.getUuid());
643 } else {
644 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Cache miss: " + message.getUuid());
645 }
646 return axolotlMessage;
647 }
648
649 private XmppAxolotlSession recreateUncachedSession(AxolotlAddress address) {
650 IdentityKey identityKey = axolotlStore.loadSession(address).getSessionState().getRemoteIdentityKey();
651 return (identityKey != null)
652 ? new XmppAxolotlSession(account, axolotlStore, address,
653 identityKey.getFingerprint().replaceAll("\\s", ""))
654 : null;
655 }
656
657 private XmppAxolotlSession getReceivingSession(XmppAxolotlMessage message) {
658 AxolotlAddress senderAddress = new AxolotlAddress(message.getFrom().toString(),
659 message.getSenderDeviceId());
660 XmppAxolotlSession session = sessions.get(senderAddress);
661 if (session == null) {
662 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account) + "Account: " + account.getJid() + " No axolotl session found while parsing received message " + message);
663 session = recreateUncachedSession(senderAddress);
664 if (session == null) {
665 session = new XmppAxolotlSession(account, axolotlStore, senderAddress);
666 }
667 }
668 return session;
669 }
670
671 public XmppAxolotlMessage.XmppAxolotlPlaintextMessage processReceivingPayloadMessage(XmppAxolotlMessage message) {
672 XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = null;
673
674 XmppAxolotlSession session = getReceivingSession(message);
675 try {
676 plaintextMessage = message.decrypt(session, getOwnDeviceId());
677 Integer preKeyId = session.getPreKeyId();
678 if (preKeyId != null) {
679 publishBundlesIfNeeded();
680 session.resetPreKeyId();
681 }
682 } catch (CryptoFailedException e) {
683 Log.w(Config.LOGTAG, getLogprefix(account) + "Failed to decrypt message: " + e.getMessage());
684 }
685
686 if (session.isFresh() && plaintextMessage != null) {
687 sessions.put(session);
688 }
689
690 return plaintextMessage;
691 }
692
693 public XmppAxolotlMessage.XmppAxolotlKeyTransportMessage processReceivingKeyTransportMessage(XmppAxolotlMessage message) {
694 XmppAxolotlMessage.XmppAxolotlKeyTransportMessage keyTransportMessage = null;
695
696 XmppAxolotlSession session = getReceivingSession(message);
697 keyTransportMessage = message.getParameters(session, getOwnDeviceId());
698
699 if (session.isFresh() && keyTransportMessage != null) {
700 sessions.put(session);
701 }
702
703 return keyTransportMessage;
704 }
705}