1package eu.siacs.conversations.parser;
2
3import android.util.Log;
4import android.util.Pair;
5
6import eu.siacs.conversations.crypto.PgpDecryptionService;
7import net.java.otr4j.session.Session;
8import net.java.otr4j.session.SessionStatus;
9
10import java.util.Set;
11
12import eu.siacs.conversations.Config;
13import eu.siacs.conversations.crypto.axolotl.AxolotlService;
14import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
15import eu.siacs.conversations.entities.Account;
16import eu.siacs.conversations.entities.Contact;
17import eu.siacs.conversations.entities.Conversation;
18import eu.siacs.conversations.entities.Message;
19import eu.siacs.conversations.entities.MucOptions;
20import eu.siacs.conversations.http.HttpConnectionManager;
21import eu.siacs.conversations.services.MessageArchiveService;
22import eu.siacs.conversations.services.XmppConnectionService;
23import eu.siacs.conversations.utils.CryptoHelper;
24import eu.siacs.conversations.xml.Element;
25import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
26import eu.siacs.conversations.xmpp.chatstate.ChatState;
27import eu.siacs.conversations.xmpp.jid.Jid;
28import eu.siacs.conversations.xmpp.pep.Avatar;
29import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
30
31public class MessageParser extends AbstractParser implements
32 OnMessagePacketReceived {
33 public MessageParser(XmppConnectionService service) {
34 super(service);
35 }
36
37 private boolean extractChatState(Conversation conversation, final MessagePacket packet) {
38 ChatState state = ChatState.parse(packet);
39 if (state != null && conversation != null) {
40 final Account account = conversation.getAccount();
41 Jid from = packet.getFrom();
42 if (from.toBareJid().equals(account.getJid().toBareJid())) {
43 conversation.setOutgoingChatState(state);
44 if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
45 mXmppConnectionService.markRead(conversation);
46 account.activateGracePeriod();
47 }
48 return false;
49 } else {
50 return conversation.setIncomingChatState(state);
51 }
52 }
53 return false;
54 }
55
56 private Message parseOtrChat(String body, Jid from, String id, Conversation conversation) {
57 String presence;
58 if (from.isBareJid()) {
59 presence = "";
60 } else {
61 presence = from.getResourcepart();
62 }
63 if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
64 conversation.endOtrIfNeeded();
65 }
66 if (!conversation.hasValidOtrSession()) {
67 conversation.startOtrSession(presence,false);
68 } else {
69 String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
70 if (!foreignPresence.equals(presence)) {
71 conversation.endOtrIfNeeded();
72 conversation.startOtrSession(presence, false);
73 }
74 }
75 try {
76 conversation.setLastReceivedOtrMessageId(id);
77 Session otrSession = conversation.getOtrSession();
78 body = otrSession.transformReceiving(body);
79 SessionStatus status = otrSession.getSessionStatus();
80 if (body == null && status == SessionStatus.ENCRYPTED) {
81 mXmppConnectionService.onOtrSessionEstablished(conversation);
82 return null;
83 } else if (body == null && status == SessionStatus.FINISHED) {
84 conversation.resetOtrSession();
85 mXmppConnectionService.updateConversationUi();
86 return null;
87 } else if (body == null || (body.isEmpty())) {
88 return null;
89 }
90 if (body.startsWith(CryptoHelper.FILETRANSFER)) {
91 String key = body.substring(CryptoHelper.FILETRANSFER.length());
92 conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
93 return null;
94 }
95 Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR, Message.STATUS_RECEIVED);
96 conversation.setLastReceivedOtrMessageId(null);
97 return finishedMessage;
98 } catch (Exception e) {
99 conversation.resetOtrSession();
100 return null;
101 }
102 }
103
104 private Message parseAxolotlChat(Element axolotlMessage, Jid from, String id, Conversation conversation, int status) {
105 Message finishedMessage = null;
106 AxolotlService service = conversation.getAccount().getAxolotlService();
107 XmppAxolotlMessage xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.toBareJid());
108 XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage);
109 if(plaintextMessage != null) {
110 finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
111 finishedMessage.setAxolotlFingerprint(plaintextMessage.getFingerprint());
112 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(finishedMessage.getConversation().getAccount())+" Received Message with session fingerprint: "+plaintextMessage.getFingerprint());
113 }
114
115 return finishedMessage;
116 }
117
118 private Message parsePGPChat(final Conversation conversation, String pgpEncrypted, int status) {
119 final Message message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
120 PgpDecryptionService pgpDecryptionService = conversation.getAccount().getPgpDecryptionService();
121 pgpDecryptionService.add(message);
122 return message;
123 }
124
125 private class Invite {
126 Jid jid;
127 String password;
128 Invite(Jid jid, String password) {
129 this.jid = jid;
130 this.password = password;
131 }
132
133 public boolean execute(Account account) {
134 if (jid != null) {
135 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true);
136 if (!conversation.getMucOptions().online()) {
137 conversation.getMucOptions().setPassword(password);
138 mXmppConnectionService.databaseBackend.updateConversation(conversation);
139 mXmppConnectionService.joinMuc(conversation);
140 mXmppConnectionService.updateConversationUi();
141 }
142 return true;
143 }
144 return false;
145 }
146 }
147
148 private Invite extractInvite(Element message) {
149 Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
150 if (x != null) {
151 Element invite = x.findChild("invite");
152 if (invite != null) {
153 Element pw = x.findChild("password");
154 return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent(): null);
155 }
156 } else {
157 x = message.findChild("x","jabber:x:conference");
158 if (x != null) {
159 return new Invite(x.getAttributeAsJid("jid"),x.getAttribute("password"));
160 }
161 }
162 return null;
163 }
164
165 private void parseEvent(final Element event, final Jid from, final Account account) {
166 Element items = event.findChild("items");
167 String node = items == null ? null : items.getAttribute("node");
168 if ("urn:xmpp:avatar:metadata".equals(node)) {
169 Avatar avatar = Avatar.parseMetadata(items);
170 if (avatar != null) {
171 avatar.owner = from;
172 if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
173 if (account.getJid().toBareJid().equals(from)) {
174 if (account.setAvatar(avatar.getFilename())) {
175 mXmppConnectionService.databaseBackend.updateAccount(account);
176 }
177 mXmppConnectionService.getAvatarService().clear(account);
178 mXmppConnectionService.updateConversationUi();
179 mXmppConnectionService.updateAccountUi();
180 } else {
181 Contact contact = account.getRoster().getContact(from);
182 contact.setAvatar(avatar);
183 mXmppConnectionService.getAvatarService().clear(contact);
184 mXmppConnectionService.updateConversationUi();
185 mXmppConnectionService.updateRosterUi();
186 }
187 } else {
188 mXmppConnectionService.fetchAvatar(account, avatar);
189 }
190 }
191 } else if ("http://jabber.org/protocol/nick".equals(node)) {
192 Element i = items.findChild("item");
193 Element nick = i == null ? null : i.findChild("nick", "http://jabber.org/protocol/nick");
194 if (nick != null) {
195 Contact contact = account.getRoster().getContact(from);
196 contact.setPresenceName(nick.getContent());
197 mXmppConnectionService.getAvatarService().clear(account);
198 mXmppConnectionService.updateConversationUi();
199 mXmppConnectionService.updateAccountUi();
200 }
201 } else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
202 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account)+"Received PEP device list update from "+ from + ", processing...");
203 Element item = items.findChild("item");
204 Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
205 AxolotlService axolotlService = account.getAxolotlService();
206 axolotlService.registerDevices(from, deviceIds);
207 mXmppConnectionService.updateAccountUi();
208 }
209 }
210
211 private boolean handleErrorMessage(Account account, MessagePacket packet) {
212 if (packet.getType() == MessagePacket.TYPE_ERROR) {
213 Jid from = packet.getFrom();
214 if (from != null) {
215 Element error = packet.findChild("error");
216 String text = error == null ? null : error.findChildContent("text");
217 if (text != null) {
218 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + text);
219 } else if (error != null) {
220 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + error);
221 }
222 Message message = mXmppConnectionService.markMessage(account,
223 from.toBareJid(),
224 packet.getId(),
225 Message.STATUS_SEND_FAILED);
226 if (message != null && message.getEncryption() == Message.ENCRYPTION_OTR) {
227 message.getConversation().endOtrIfNeeded();
228 }
229 }
230 return true;
231 }
232 return false;
233 }
234
235 @Override
236 public void onMessagePacketReceived(Account account, MessagePacket original) {
237 if (handleErrorMessage(account, original)) {
238 return;
239 }
240 final MessagePacket packet;
241 Long timestamp = null;
242 final boolean isForwarded;
243 boolean isCarbon = false;
244 String serverMsgId = null;
245 final Element fin = original.findChild("fin", "urn:xmpp:mam:0");
246 if (fin != null) {
247 mXmppConnectionService.getMessageArchiveService().processFin(fin,original.getFrom());
248 return;
249 }
250 final Element result = original.findChild("result","urn:xmpp:mam:0");
251 final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
252 if (query != null && query.validFrom(original.getFrom())) {
253 Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", "urn:xmpp:mam:0");
254 if (f == null) {
255 return;
256 }
257 timestamp = f.second;
258 packet = f.first;
259 isForwarded = true;
260 serverMsgId = result.getAttribute("id");
261 query.incrementTotalCount();
262 } else if (query != null) {
263 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
264 return;
265 } else if (original.fromServer(account)) {
266 Pair<MessagePacket, Long> f;
267 f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
268 f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
269 packet = f != null ? f.first : original;
270 if (handleErrorMessage(account, packet)) {
271 return;
272 }
273 timestamp = f != null ? f.second : null;
274 isCarbon = f != null;
275 isForwarded = isCarbon;
276 } else {
277 packet = original;
278 isForwarded = false;
279 }
280
281 if (timestamp == null) {
282 timestamp = AbstractParser.getTimestamp(packet, System.currentTimeMillis());
283 }
284 final String body = packet.getBody();
285 final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
286 final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
287 final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
288 int status;
289 final Jid counterpart;
290 final Jid to = packet.getTo();
291 final Jid from = packet.getFrom();
292 final String remoteMsgId = packet.getId();
293
294 if (from == null || to == null) {
295 Log.d(Config.LOGTAG,"no to or from in: "+packet.toString());
296 return;
297 }
298
299 boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
300 boolean isProperlyAddressed = !to.isBareJid() || account.countPresences() == 1;
301 boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
302 if (packet.fromAccount(account)) {
303 status = Message.STATUS_SEND;
304 counterpart = to;
305 } else {
306 status = Message.STATUS_RECEIVED;
307 counterpart = from;
308 }
309
310 Invite invite = extractInvite(packet);
311 if (invite != null && invite.execute(account)) {
312 return;
313 }
314
315 if (extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), packet)) {
316 mXmppConnectionService.updateConversationUi();
317 }
318
319 if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
320 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat);
321 if (isTypeGroupChat) {
322 if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
323 status = Message.STATUS_SEND_RECEIVED;
324 if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
325 return;
326 } else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
327 Message message = conversation.findSentMessageWithBody(packet.getBody());
328 if (message != null) {
329 mXmppConnectionService.markMessage(message, status);
330 return;
331 }
332 }
333 } else {
334 status = Message.STATUS_RECEIVED;
335 }
336 }
337 Message message;
338 if (body != null && body.startsWith("?OTR")) {
339 if (!isForwarded && !isTypeGroupChat && isProperlyAddressed) {
340 message = parseOtrChat(body, from, remoteMsgId, conversation);
341 if (message == null) {
342 return;
343 }
344 } else {
345 message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
346 }
347 } else if (pgpEncrypted != null) {
348 message = parsePGPChat(conversation, pgpEncrypted, status);
349 } else if (axolotlEncrypted != null) {
350 message = parseAxolotlChat(axolotlEncrypted, from, remoteMsgId, conversation, status);
351 if (message == null) {
352 return;
353 }
354 } else {
355 message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
356 }
357 message.setCounterpart(counterpart);
358 message.setRemoteMsgId(remoteMsgId);
359 message.setServerMsgId(serverMsgId);
360 message.setCarbon(isCarbon);
361 message.setTime(timestamp);
362 message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
363 if (conversation.getMode() == Conversation.MODE_MULTI) {
364 Jid trueCounterpart = conversation.getMucOptions().getTrueCounterpart(counterpart.getResourcepart());
365 message.setTrueCounterpart(trueCounterpart);
366 if (trueCounterpart != null) {
367 updateLastseen(packet,account,trueCounterpart,false);
368 }
369 if (!isTypeGroupChat) {
370 message.setType(Message.TYPE_PRIVATE);
371 }
372 }
373 updateLastseen(packet,account,true);
374 boolean checkForDuplicates = serverMsgId != null
375 || (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
376 || message.getType() == Message.TYPE_PRIVATE;
377 if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
378 Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
379 return;
380 }
381 if (query != null) {
382 query.incrementMessageCount();
383 }
384 conversation.add(message);
385 if (serverMsgId == null) {
386 if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
387 mXmppConnectionService.markRead(conversation);
388 account.activateGracePeriod();
389 } else {
390 message.markUnread();
391 }
392 mXmppConnectionService.updateConversationUi();
393 }
394
395 if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded && !isTypeGroupChat) {
396 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
397 MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
398 packet,
399 "urn:xmpp:chat-markers:0",
400 MessagePacket.TYPE_CHAT);
401 mXmppConnectionService.sendMessagePacket(account, receipt);
402 }
403 if (packet.hasChild("request", "urn:xmpp:receipts")) {
404 MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
405 packet,
406 "urn:xmpp:receipts",
407 packet.getType());
408 mXmppConnectionService.sendMessagePacket(account, receipt);
409 }
410 }
411 if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
412 if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
413 mXmppConnectionService.updateConversation(conversation);
414 }
415 }
416
417 if (message.getStatus() == Message.STATUS_RECEIVED
418 && conversation.getOtrSession() != null
419 && !conversation.getOtrSession().getSessionID().getUserID()
420 .equals(message.getCounterpart().getResourcepart())) {
421 conversation.endOtrIfNeeded();
422 }
423
424 if (message.getEncryption() == Message.ENCRYPTION_NONE || mXmppConnectionService.saveEncryptedMessages()) {
425 mXmppConnectionService.databaseBackend.createMessage(message);
426 }
427 final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
428 if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
429 manager.createNewDownloadConnection(message);
430 } else if (!message.isRead()) {
431 mXmppConnectionService.getNotificationService().push(message);
432 }
433 } else { //no body
434 if (isTypeGroupChat) {
435 Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
436 if (packet.hasChild("subject")) {
437 if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
438 conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
439 conversation.getMucOptions().setSubject(packet.findChildContent("subject"));
440 mXmppConnectionService.updateConversationUi();
441 return;
442 }
443 }
444
445 if (conversation != null && isMucStatusMessage) {
446 for (Element child : mucUserElement.getChildren()) {
447 if (child.getName().equals("status")
448 && MucOptions.STATUS_CODE_ROOM_CONFIG_CHANGED.equals(child.getAttribute("code"))) {
449 mXmppConnectionService.fetchConferenceConfiguration(conversation);
450 }
451 }
452 }
453 }
454 }
455
456 Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
457 if (received == null) {
458 received = packet.findChild("received", "urn:xmpp:receipts");
459 }
460 if (received != null && !packet.fromAccount(account)) {
461 mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
462 }
463 Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
464 if (displayed != null) {
465 if (packet.fromAccount(account)) {
466 Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
467 if (conversation != null) {
468 mXmppConnectionService.markRead(conversation);
469 }
470 } else {
471 updateLastseen(packet, account, true);
472 final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
473 Message message = displayedMessage == null ? null : displayedMessage.prev();
474 while (message != null
475 && message.getStatus() == Message.STATUS_SEND_RECEIVED
476 && message.getTimeSent() < displayedMessage.getTimeSent()) {
477 mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
478 message = message.prev();
479 }
480 }
481 }
482
483 Element event = packet.findChild("event", "http://jabber.org/protocol/pubsub#event");
484 if (event != null) {
485 parseEvent(event, from, account);
486 }
487
488 String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
489 if (nick != null) {
490 Contact contact = account.getRoster().getContact(from);
491 contact.setPresenceName(nick);
492 }
493 }
494}