1package eu.siacs.conversations.parser;
2
3import android.util.Log;
4import android.util.Pair;
5
6import net.java.otr4j.session.Session;
7import net.java.otr4j.session.SessionStatus;
8
9import java.util.Set;
10
11import eu.siacs.conversations.Config;
12import eu.siacs.conversations.crypto.axolotl.AxolotlService;
13import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
14import eu.siacs.conversations.entities.Account;
15import eu.siacs.conversations.entities.Contact;
16import eu.siacs.conversations.entities.Conversation;
17import eu.siacs.conversations.entities.Message;
18import eu.siacs.conversations.entities.MucOptions;
19import eu.siacs.conversations.http.HttpConnectionManager;
20import eu.siacs.conversations.services.MessageArchiveService;
21import eu.siacs.conversations.services.XmppConnectionService;
22import eu.siacs.conversations.utils.CryptoHelper;
23import eu.siacs.conversations.xml.Element;
24import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
25import eu.siacs.conversations.xmpp.chatstate.ChatState;
26import eu.siacs.conversations.xmpp.jid.Jid;
27import eu.siacs.conversations.xmpp.pep.Avatar;
28import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
29
30public class MessageParser extends AbstractParser implements
31 OnMessagePacketReceived {
32 public MessageParser(XmppConnectionService service) {
33 super(service);
34 }
35
36 private boolean extractChatState(Conversation conversation, final MessagePacket packet) {
37 ChatState state = ChatState.parse(packet);
38 if (state != null && conversation != null) {
39 final Account account = conversation.getAccount();
40 Jid from = packet.getFrom();
41 if (from.toBareJid().equals(account.getJid().toBareJid())) {
42 conversation.setOutgoingChatState(state);
43 if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
44 mXmppConnectionService.markRead(conversation);
45 account.activateGracePeriod();
46 }
47 return false;
48 } else {
49 return conversation.setIncomingChatState(state);
50 }
51 }
52 return false;
53 }
54
55 private Message parseOtrChat(String body, Jid from, String id, Conversation conversation) {
56 String presence;
57 if (from.isBareJid()) {
58 presence = "";
59 } else {
60 presence = from.getResourcepart();
61 }
62 if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
63 conversation.endOtrIfNeeded();
64 }
65 if (!conversation.hasValidOtrSession()) {
66 conversation.startOtrSession(presence,false);
67 } else {
68 String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
69 if (!foreignPresence.equals(presence)) {
70 conversation.endOtrIfNeeded();
71 conversation.startOtrSession(presence, false);
72 }
73 }
74 try {
75 conversation.setLastReceivedOtrMessageId(id);
76 Session otrSession = conversation.getOtrSession();
77 body = otrSession.transformReceiving(body);
78 SessionStatus status = otrSession.getSessionStatus();
79 if (body == null && status == SessionStatus.ENCRYPTED) {
80 mXmppConnectionService.onOtrSessionEstablished(conversation);
81 return null;
82 } else if (body == null && status == SessionStatus.FINISHED) {
83 conversation.resetOtrSession();
84 mXmppConnectionService.updateConversationUi();
85 return null;
86 } else if (body == null || (body.isEmpty())) {
87 return null;
88 }
89 if (body.startsWith(CryptoHelper.FILETRANSFER)) {
90 String key = body.substring(CryptoHelper.FILETRANSFER.length());
91 conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
92 return null;
93 }
94 Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR, Message.STATUS_RECEIVED);
95 conversation.setLastReceivedOtrMessageId(null);
96 return finishedMessage;
97 } catch (Exception e) {
98 conversation.resetOtrSession();
99 return null;
100 }
101 }
102
103 private Message parseAxolotlChat(Element axolotlMessage, Jid from, String id, Conversation conversation, int status) {
104 Message finishedMessage = null;
105 AxolotlService service = conversation.getAccount().getAxolotlService();
106 XmppAxolotlMessage xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.toBareJid());
107 XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage);
108 if(plaintextMessage != null) {
109 finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
110 finishedMessage.setAxolotlFingerprint(plaintextMessage.getFingerprint());
111 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(finishedMessage.getConversation().getAccount())+" Received Message with session fingerprint: "+plaintextMessage.getFingerprint());
112 }
113
114 return finishedMessage;
115 }
116
117 private class Invite {
118 Jid jid;
119 String password;
120 Invite(Jid jid, String password) {
121 this.jid = jid;
122 this.password = password;
123 }
124
125 public boolean execute(Account account) {
126 if (jid != null) {
127 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true);
128 if (!conversation.getMucOptions().online()) {
129 conversation.getMucOptions().setPassword(password);
130 mXmppConnectionService.databaseBackend.updateConversation(conversation);
131 mXmppConnectionService.joinMuc(conversation);
132 mXmppConnectionService.updateConversationUi();
133 }
134 return true;
135 }
136 return false;
137 }
138 }
139
140 private Invite extractInvite(Element message) {
141 Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
142 if (x != null) {
143 Element invite = x.findChild("invite");
144 if (invite != null) {
145 Element pw = x.findChild("password");
146 return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent(): null);
147 }
148 } else {
149 x = message.findChild("x","jabber:x:conference");
150 if (x != null) {
151 return new Invite(x.getAttributeAsJid("jid"),x.getAttribute("password"));
152 }
153 }
154 return null;
155 }
156
157 private void parseEvent(final Element event, final Jid from, final Account account) {
158 Element items = event.findChild("items");
159 String node = items == null ? null : items.getAttribute("node");
160 if ("urn:xmpp:avatar:metadata".equals(node)) {
161 Avatar avatar = Avatar.parseMetadata(items);
162 if (avatar != null) {
163 avatar.owner = from;
164 if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
165 if (account.getJid().toBareJid().equals(from)) {
166 if (account.setAvatar(avatar.getFilename())) {
167 mXmppConnectionService.databaseBackend.updateAccount(account);
168 }
169 mXmppConnectionService.getAvatarService().clear(account);
170 mXmppConnectionService.updateConversationUi();
171 mXmppConnectionService.updateAccountUi();
172 } else {
173 Contact contact = account.getRoster().getContact(from);
174 contact.setAvatar(avatar);
175 mXmppConnectionService.getAvatarService().clear(contact);
176 mXmppConnectionService.updateConversationUi();
177 mXmppConnectionService.updateRosterUi();
178 }
179 } else {
180 mXmppConnectionService.fetchAvatar(account, avatar);
181 }
182 }
183 } else if ("http://jabber.org/protocol/nick".equals(node)) {
184 Element i = items.findChild("item");
185 Element nick = i == null ? null : i.findChild("nick", "http://jabber.org/protocol/nick");
186 if (nick != null) {
187 Contact contact = account.getRoster().getContact(from);
188 contact.setPresenceName(nick.getContent());
189 mXmppConnectionService.getAvatarService().clear(account);
190 mXmppConnectionService.updateConversationUi();
191 mXmppConnectionService.updateAccountUi();
192 }
193 } else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
194 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account)+"Received PEP device list update from "+ from + ", processing...");
195 Element item = items.findChild("item");
196 Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
197 AxolotlService axolotlService = account.getAxolotlService();
198 axolotlService.registerDevices(from, deviceIds);
199 mXmppConnectionService.updateAccountUi();
200 }
201 }
202
203 private boolean handleErrorMessage(Account account, MessagePacket packet) {
204 if (packet.getType() == MessagePacket.TYPE_ERROR) {
205 Jid from = packet.getFrom();
206 if (from != null) {
207 Element error = packet.findChild("error");
208 String text = error == null ? null : error.findChildContent("text");
209 if (text != null) {
210 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + text);
211 } else if (error != null) {
212 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + error);
213 }
214 Message message = mXmppConnectionService.markMessage(account,
215 from.toBareJid(),
216 packet.getId(),
217 Message.STATUS_SEND_FAILED);
218 if (message != null && message.getEncryption() == Message.ENCRYPTION_OTR) {
219 message.getConversation().endOtrIfNeeded();
220 }
221 }
222 return true;
223 }
224 return false;
225 }
226
227 @Override
228 public void onMessagePacketReceived(Account account, MessagePacket original) {
229 if (handleErrorMessage(account, original)) {
230 return;
231 }
232 final MessagePacket packet;
233 Long timestamp = null;
234 final boolean isForwarded;
235 boolean isCarbon = false;
236 String serverMsgId = null;
237 final Element fin = original.findChild("fin", "urn:xmpp:mam:0");
238 if (fin != null) {
239 mXmppConnectionService.getMessageArchiveService().processFin(fin,original.getFrom());
240 return;
241 }
242 final Element result = original.findChild("result","urn:xmpp:mam:0");
243 final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
244 if (query != null && query.validFrom(original.getFrom())) {
245 Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", "urn:xmpp:mam:0");
246 if (f == null) {
247 return;
248 }
249 timestamp = f.second;
250 packet = f.first;
251 isForwarded = true;
252 serverMsgId = result.getAttribute("id");
253 query.incrementTotalCount();
254 } else if (query != null) {
255 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
256 return;
257 } else if (original.fromServer(account)) {
258 Pair<MessagePacket, Long> f;
259 f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
260 f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
261 packet = f != null ? f.first : original;
262 if (handleErrorMessage(account, packet)) {
263 return;
264 }
265 timestamp = f != null ? f.second : null;
266 isCarbon = f != null;
267 isForwarded = isCarbon;
268 } else {
269 packet = original;
270 isForwarded = false;
271 }
272
273 if (timestamp == null) {
274 timestamp = AbstractParser.getTimestamp(packet, System.currentTimeMillis());
275 }
276 final String body = packet.getBody();
277 final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
278 final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
279 final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
280 int status;
281 final Jid counterpart;
282 final Jid to = packet.getTo();
283 final Jid from = packet.getFrom();
284 final String remoteMsgId = packet.getId();
285
286 if (from == null || to == null) {
287 Log.d(Config.LOGTAG,"no to or from in: "+packet.toString());
288 return;
289 }
290
291 boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
292 boolean isProperlyAddressed = !to.isBareJid() || account.countPresences() == 1;
293 boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
294 if (packet.fromAccount(account)) {
295 status = Message.STATUS_SEND;
296 counterpart = to;
297 } else {
298 status = Message.STATUS_RECEIVED;
299 counterpart = from;
300 }
301
302 Invite invite = extractInvite(packet);
303 if (invite != null && invite.execute(account)) {
304 return;
305 }
306
307 if (extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), packet)) {
308 mXmppConnectionService.updateConversationUi();
309 }
310
311 if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
312 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat);
313 if (isTypeGroupChat) {
314 if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
315 status = Message.STATUS_SEND_RECEIVED;
316 if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
317 return;
318 } else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
319 Message message = conversation.findSentMessageWithBody(packet.getBody());
320 if (message != null) {
321 mXmppConnectionService.markMessage(message, status);
322 return;
323 }
324 }
325 } else {
326 status = Message.STATUS_RECEIVED;
327 }
328 }
329 Message message;
330 if (body != null && body.startsWith("?OTR")) {
331 if (!isForwarded && !isTypeGroupChat && isProperlyAddressed) {
332 message = parseOtrChat(body, from, remoteMsgId, conversation);
333 if (message == null) {
334 return;
335 }
336 } else {
337 message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
338 }
339 } else if (pgpEncrypted != null) {
340 message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
341 } else if (axolotlEncrypted != null) {
342 message = parseAxolotlChat(axolotlEncrypted, from, remoteMsgId, conversation, status);
343 if (message == null) {
344 return;
345 }
346 } else {
347 message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
348 }
349 message.setCounterpart(counterpart);
350 message.setRemoteMsgId(remoteMsgId);
351 message.setServerMsgId(serverMsgId);
352 message.setCarbon(isCarbon);
353 message.setTime(timestamp);
354 message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
355 if (conversation.getMode() == Conversation.MODE_MULTI) {
356 Jid trueCounterpart = conversation.getMucOptions().getTrueCounterpart(counterpart.getResourcepart());
357 message.setTrueCounterpart(trueCounterpart);
358 if (trueCounterpart != null) {
359 updateLastseen(packet,account,trueCounterpart,false);
360 }
361 if (!isTypeGroupChat) {
362 message.setType(Message.TYPE_PRIVATE);
363 }
364 }
365 updateLastseen(packet,account,true);
366 boolean checkForDuplicates = serverMsgId != null
367 || (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
368 || message.getType() == Message.TYPE_PRIVATE;
369 if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
370 Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
371 return;
372 }
373 if (query != null) {
374 query.incrementMessageCount();
375 }
376 conversation.add(message);
377 if (serverMsgId == null) {
378 if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
379 mXmppConnectionService.markRead(conversation);
380 account.activateGracePeriod();
381 } else {
382 message.markUnread();
383 }
384 mXmppConnectionService.updateConversationUi();
385 }
386
387 if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded && !isTypeGroupChat) {
388 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
389 MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
390 packet,
391 "urn:xmpp:chat-markers:0",
392 MessagePacket.TYPE_CHAT);
393 mXmppConnectionService.sendMessagePacket(account, receipt);
394 }
395 if (packet.hasChild("request", "urn:xmpp:receipts")) {
396 MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
397 packet,
398 "urn:xmpp:receipts",
399 packet.getType());
400 mXmppConnectionService.sendMessagePacket(account, receipt);
401 }
402 }
403 if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
404 if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
405 mXmppConnectionService.updateConversation(conversation);
406 }
407 }
408
409 if (message.getStatus() == Message.STATUS_RECEIVED
410 && conversation.getOtrSession() != null
411 && !conversation.getOtrSession().getSessionID().getUserID()
412 .equals(message.getCounterpart().getResourcepart())) {
413 conversation.endOtrIfNeeded();
414 }
415
416 if (message.getEncryption() == Message.ENCRYPTION_NONE || mXmppConnectionService.saveEncryptedMessages()) {
417 mXmppConnectionService.databaseBackend.createMessage(message);
418 }
419 final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
420 if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
421 manager.createNewDownloadConnection(message);
422 } else if (!message.isRead()) {
423 mXmppConnectionService.getNotificationService().push(message);
424 }
425 } else { //no body
426 if (isTypeGroupChat) {
427 Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
428 if (packet.hasChild("subject")) {
429 if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
430 conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
431 conversation.getMucOptions().setSubject(packet.findChildContent("subject"));
432 mXmppConnectionService.updateConversationUi();
433 return;
434 }
435 }
436
437 if (conversation != null && isMucStatusMessage) {
438 for (Element child : mucUserElement.getChildren()) {
439 if (child.getName().equals("status")
440 && MucOptions.STATUS_CODE_ROOM_CONFIG_CHANGED.equals(child.getAttribute("code"))) {
441 mXmppConnectionService.fetchConferenceConfiguration(conversation);
442 }
443 }
444 }
445 }
446 }
447
448 Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
449 if (received == null) {
450 received = packet.findChild("received", "urn:xmpp:receipts");
451 }
452 if (received != null && !packet.fromAccount(account)) {
453 mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
454 }
455 Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
456 if (displayed != null) {
457 if (packet.fromAccount(account)) {
458 Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
459 if (conversation != null) {
460 mXmppConnectionService.markRead(conversation);
461 }
462 } else {
463 updateLastseen(packet, account, true);
464 final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
465 Message message = displayedMessage == null ? null : displayedMessage.prev();
466 while (message != null
467 && message.getStatus() == Message.STATUS_SEND_RECEIVED
468 && message.getTimeSent() < displayedMessage.getTimeSent()) {
469 mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
470 message = message.prev();
471 }
472 }
473 }
474
475 Element event = packet.findChild("event", "http://jabber.org/protocol/pubsub#event");
476 if (event != null) {
477 parseEvent(event, from, account);
478 }
479
480 String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
481 if (nick != null) {
482 Contact contact = account.getRoster().getContact(from);
483 contact.setPresenceName(nick);
484 }
485 }
486}