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