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.ArrayList;
11import java.util.Set;
12
13import eu.siacs.conversations.Config;
14import eu.siacs.conversations.crypto.axolotl.AxolotlService;
15import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
16import eu.siacs.conversations.entities.Account;
17import eu.siacs.conversations.entities.Contact;
18import eu.siacs.conversations.entities.Conversation;
19import eu.siacs.conversations.entities.Message;
20import eu.siacs.conversations.entities.MucOptions;
21import eu.siacs.conversations.http.HttpConnectionManager;
22import eu.siacs.conversations.services.MessageArchiveService;
23import eu.siacs.conversations.services.XmppConnectionService;
24import eu.siacs.conversations.utils.CryptoHelper;
25import eu.siacs.conversations.xml.Element;
26import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
27import eu.siacs.conversations.xmpp.chatstate.ChatState;
28import eu.siacs.conversations.xmpp.jid.Jid;
29import eu.siacs.conversations.xmpp.pep.Avatar;
30import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
31
32public class MessageParser extends AbstractParser implements
33 OnMessagePacketReceived {
34 public MessageParser(XmppConnectionService service) {
35 super(service);
36 }
37
38 private boolean extractChatState(Conversation conversation, final MessagePacket packet) {
39 ChatState state = ChatState.parse(packet);
40 if (state != null && conversation != null) {
41 final Account account = conversation.getAccount();
42 Jid from = packet.getFrom();
43 if (from.toBareJid().equals(account.getJid().toBareJid())) {
44 conversation.setOutgoingChatState(state);
45 if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
46 mXmppConnectionService.markRead(conversation);
47 account.activateGracePeriod();
48 }
49 return false;
50 } else {
51 return conversation.setIncomingChatState(state);
52 }
53 }
54 return false;
55 }
56
57 private Message parseOtrChat(String body, Jid from, String id, Conversation conversation) {
58 String presence;
59 if (from.isBareJid()) {
60 presence = "";
61 } else {
62 presence = from.getResourcepart();
63 }
64 if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
65 conversation.endOtrIfNeeded();
66 }
67 if (!conversation.hasValidOtrSession()) {
68 conversation.startOtrSession(presence,false);
69 } else {
70 String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
71 if (!foreignPresence.equals(presence)) {
72 conversation.endOtrIfNeeded();
73 conversation.startOtrSession(presence, false);
74 }
75 }
76 try {
77 conversation.setLastReceivedOtrMessageId(id);
78 Session otrSession = conversation.getOtrSession();
79 body = otrSession.transformReceiving(body);
80 SessionStatus status = otrSession.getSessionStatus();
81 if (body == null && status == SessionStatus.ENCRYPTED) {
82 mXmppConnectionService.onOtrSessionEstablished(conversation);
83 return null;
84 } else if (body == null && status == SessionStatus.FINISHED) {
85 conversation.resetOtrSession();
86 mXmppConnectionService.updateConversationUi();
87 return null;
88 } else if (body == null || (body.isEmpty())) {
89 return null;
90 }
91 if (body.startsWith(CryptoHelper.FILETRANSFER)) {
92 String key = body.substring(CryptoHelper.FILETRANSFER.length());
93 conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
94 return null;
95 }
96 Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR, Message.STATUS_RECEIVED);
97 conversation.setLastReceivedOtrMessageId(null);
98 return finishedMessage;
99 } catch (Exception e) {
100 conversation.resetOtrSession();
101 return null;
102 }
103 }
104
105 private Message parseAxolotlChat(Element axolotlMessage, Jid from, String id, Conversation conversation, int status) {
106 Message finishedMessage = null;
107 AxolotlService service = conversation.getAccount().getAxolotlService();
108 XmppAxolotlMessage xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.toBareJid());
109 XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage);
110 if(plaintextMessage != null) {
111 finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
112 finishedMessage.setAxolotlFingerprint(plaintextMessage.getFingerprint());
113 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(finishedMessage.getConversation().getAccount())+" Received Message with session fingerprint: "+plaintextMessage.getFingerprint());
114 }
115
116 return finishedMessage;
117 }
118
119 private Message parsePGPChat(final Conversation conversation, String pgpEncrypted, int status) {
120 final Message message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
121 PgpDecryptionService pgpDecryptionService = conversation.getAccount().getPgpDecryptionService();
122 pgpDecryptionService.add(message);
123 return message;
124 }
125
126 private class Invite {
127 Jid jid;
128 String password;
129 Invite(Jid jid, String password) {
130 this.jid = jid;
131 this.password = password;
132 }
133
134 public boolean execute(Account account) {
135 if (jid != null) {
136 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true);
137 if (!conversation.getMucOptions().online()) {
138 conversation.getMucOptions().setPassword(password);
139 mXmppConnectionService.databaseBackend.updateConversation(conversation);
140 mXmppConnectionService.joinMuc(conversation);
141 mXmppConnectionService.updateConversationUi();
142 }
143 return true;
144 }
145 return false;
146 }
147 }
148
149 private Invite extractInvite(Element message) {
150 Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
151 if (x != null) {
152 Element invite = x.findChild("invite");
153 if (invite != null) {
154 Element pw = x.findChild("password");
155 return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent(): null);
156 }
157 } else {
158 x = message.findChild("x","jabber:x:conference");
159 if (x != null) {
160 return new Invite(x.getAttributeAsJid("jid"),x.getAttribute("password"));
161 }
162 }
163 return null;
164 }
165
166 private static String extractStanzaId(Element packet, Jid by) {
167 for(Element child : packet.getChildren()) {
168 if (child.getName().equals("stanza-id")
169 && "urn:xmpp:sid:0".equals(child.getNamespace())
170 && by.equals(child.getAttributeAsJid("by"))) {
171 return child.getAttribute("id");
172 }
173 }
174 return null;
175 }
176
177 private void parseEvent(final Element event, final Jid from, final Account account) {
178 Element items = event.findChild("items");
179 String node = items == null ? null : items.getAttribute("node");
180 if ("urn:xmpp:avatar:metadata".equals(node)) {
181 Avatar avatar = Avatar.parseMetadata(items);
182 if (avatar != null) {
183 avatar.owner = from.toBareJid();
184 if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
185 if (account.getJid().toBareJid().equals(from)) {
186 if (account.setAvatar(avatar.getFilename())) {
187 mXmppConnectionService.databaseBackend.updateAccount(account);
188 }
189 mXmppConnectionService.getAvatarService().clear(account);
190 mXmppConnectionService.updateConversationUi();
191 mXmppConnectionService.updateAccountUi();
192 } else {
193 Contact contact = account.getRoster().getContact(from);
194 contact.setAvatar(avatar);
195 mXmppConnectionService.getAvatarService().clear(contact);
196 mXmppConnectionService.updateConversationUi();
197 mXmppConnectionService.updateRosterUi();
198 }
199 } else {
200 mXmppConnectionService.fetchAvatar(account, avatar);
201 }
202 }
203 } else if ("http://jabber.org/protocol/nick".equals(node)) {
204 Element i = items.findChild("item");
205 Element nick = i == null ? null : i.findChild("nick", "http://jabber.org/protocol/nick");
206 if (nick != null && nick.getContent() != null) {
207 Contact contact = account.getRoster().getContact(from);
208 contact.setPresenceName(nick.getContent());
209 mXmppConnectionService.getAvatarService().clear(account);
210 mXmppConnectionService.updateConversationUi();
211 mXmppConnectionService.updateAccountUi();
212 }
213 } else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
214 Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account)+"Received PEP device list update from "+ from + ", processing...");
215 Element item = items.findChild("item");
216 Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
217 AxolotlService axolotlService = account.getAxolotlService();
218 axolotlService.registerDevices(from, deviceIds);
219 mXmppConnectionService.updateAccountUi();
220 }
221 }
222
223 private boolean handleErrorMessage(Account account, MessagePacket packet) {
224 if (packet.getType() == MessagePacket.TYPE_ERROR) {
225 Jid from = packet.getFrom();
226 if (from != null) {
227 Element error = packet.findChild("error");
228 String text = error == null ? null : error.findChildContent("text");
229 if (text != null) {
230 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + text);
231 } else if (error != null) {
232 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + error);
233 }
234 Message message = mXmppConnectionService.markMessage(account,
235 from.toBareJid(),
236 packet.getId(),
237 Message.STATUS_SEND_FAILED);
238 if (message != null && message.getEncryption() == Message.ENCRYPTION_OTR) {
239 message.getConversation().endOtrIfNeeded();
240 }
241 }
242 return true;
243 }
244 return false;
245 }
246
247 @Override
248 public void onMessagePacketReceived(Account account, MessagePacket original) {
249 if (handleErrorMessage(account, original)) {
250 return;
251 }
252 final MessagePacket packet;
253 Long timestamp = null;
254 final boolean isForwarded;
255 boolean isCarbon = false;
256 String serverMsgId = null;
257 final Element fin = original.findChild("fin", "urn:xmpp:mam:0");
258 if (fin != null) {
259 mXmppConnectionService.getMessageArchiveService().processFin(fin,original.getFrom());
260 return;
261 }
262 final Element result = original.findChild("result","urn:xmpp:mam:0");
263 final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
264 if (query != null && query.validFrom(original.getFrom())) {
265 Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", "urn:xmpp:mam:0");
266 if (f == null) {
267 return;
268 }
269 timestamp = f.second;
270 packet = f.first;
271 isForwarded = true;
272 serverMsgId = result.getAttribute("id");
273 query.incrementTotalCount();
274 } else if (query != null) {
275 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
276 return;
277 } else if (original.fromServer(account)) {
278 Pair<MessagePacket, Long> f;
279 f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
280 f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
281 packet = f != null ? f.first : original;
282 if (handleErrorMessage(account, packet)) {
283 return;
284 }
285 timestamp = f != null ? f.second : null;
286 isCarbon = f != null;
287 isForwarded = isCarbon;
288 } else {
289 packet = original;
290 isForwarded = false;
291 }
292
293 if (timestamp == null) {
294 timestamp = AbstractParser.getTimestamp(packet, System.currentTimeMillis());
295 }
296 final String body = packet.getBody();
297 final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
298 final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
299 final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
300 int status;
301 final Jid counterpart;
302 final Jid to = packet.getTo();
303 final Jid from = packet.getFrom();
304 final String remoteMsgId = packet.getId();
305
306 if (from == null || to == null) {
307 Log.d(Config.LOGTAG,"no to or from in: "+packet.toString());
308 return;
309 }
310
311 boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
312 boolean isProperlyAddressed = !to.isBareJid() || account.countPresences() == 1;
313 boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
314 if (packet.fromAccount(account)) {
315 status = Message.STATUS_SEND;
316 counterpart = to;
317 } else {
318 status = Message.STATUS_RECEIVED;
319 counterpart = from;
320 }
321
322 Invite invite = extractInvite(packet);
323 if (invite != null && invite.execute(account)) {
324 return;
325 }
326
327 if (extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), packet)) {
328 mXmppConnectionService.updateConversationUi();
329 }
330
331 if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
332 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat);
333 if (isTypeGroupChat) {
334 if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
335 status = Message.STATUS_SEND_RECEIVED;
336 if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
337 return;
338 } else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
339 Message message = conversation.findSentMessageWithBody(packet.getBody());
340 if (message != null) {
341 mXmppConnectionService.markMessage(message, status);
342 return;
343 }
344 }
345 } else {
346 status = Message.STATUS_RECEIVED;
347 }
348 }
349 Message message;
350 if (body != null && body.startsWith("?OTR")) {
351 if (!isForwarded && !isTypeGroupChat && isProperlyAddressed) {
352 message = parseOtrChat(body, from, remoteMsgId, conversation);
353 if (message == null) {
354 return;
355 }
356 } else {
357 message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
358 }
359 } else if (pgpEncrypted != null) {
360 message = parsePGPChat(conversation, pgpEncrypted, status);
361 } else if (axolotlEncrypted != null) {
362 message = parseAxolotlChat(axolotlEncrypted, from, remoteMsgId, conversation, status);
363 if (message == null) {
364 return;
365 }
366 } else {
367 message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
368 }
369
370 if (serverMsgId == null) {
371 serverMsgId = extractStanzaId(packet, isTypeGroupChat ? conversation.getJid().toBareJid() : account.getServer());
372 }
373
374 message.setCounterpart(counterpart);
375 message.setRemoteMsgId(remoteMsgId);
376 message.setServerMsgId(serverMsgId);
377 message.setCarbon(isCarbon);
378 message.setTime(timestamp);
379 message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
380 if (conversation.getMode() == Conversation.MODE_MULTI) {
381 Jid trueCounterpart = conversation.getMucOptions().getTrueCounterpart(counterpart.getResourcepart());
382 message.setTrueCounterpart(trueCounterpart);
383 if (trueCounterpart != null) {
384 updateLastseen(packet,account,trueCounterpart,false);
385 }
386 if (!isTypeGroupChat) {
387 message.setType(Message.TYPE_PRIVATE);
388 }
389 }
390 updateLastseen(packet,account,true);
391 boolean checkForDuplicates = serverMsgId != null
392 || (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
393 || message.getType() == Message.TYPE_PRIVATE;
394 if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
395 Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
396 return;
397 }
398
399 conversation.add(message);
400 if (query != null) {
401 query.incrementMessageCount();
402 } else {
403 if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
404 mXmppConnectionService.markRead(conversation);
405 account.activateGracePeriod();
406 } else {
407 message.markUnread();
408 }
409 mXmppConnectionService.updateConversationUi();
410 }
411
412 if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded && !isTypeGroupChat) {
413 ArrayList<String> receiptsNamespaces = new ArrayList<>();
414 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
415 receiptsNamespaces.add("urn:xmpp:chat-markers:0");
416 }
417 if (packet.hasChild("request", "urn:xmpp:receipts")) {
418 receiptsNamespaces.add("urn:xmpp:receipts");
419 }
420 if (receiptsNamespaces.size() > 0) {
421 MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
422 packet,
423 receiptsNamespaces,
424 packet.getType());
425 mXmppConnectionService.sendMessagePacket(account, receipt);
426 }
427 }
428 if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
429 if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
430 mXmppConnectionService.updateConversation(conversation);
431 }
432 }
433
434 if (message.getStatus() == Message.STATUS_RECEIVED
435 && conversation.getOtrSession() != null
436 && !conversation.getOtrSession().getSessionID().getUserID()
437 .equals(message.getCounterpart().getResourcepart())) {
438 conversation.endOtrIfNeeded();
439 }
440
441 if (message.getEncryption() == Message.ENCRYPTION_NONE || mXmppConnectionService.saveEncryptedMessages()) {
442 mXmppConnectionService.databaseBackend.createMessage(message);
443 }
444 final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
445 if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
446 manager.createNewDownloadConnection(message);
447 } else if (!message.isRead()) {
448 mXmppConnectionService.getNotificationService().push(message);
449 }
450 } else { //no body
451 if (isTypeGroupChat) {
452 Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
453 if (packet.hasChild("subject")) {
454 if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
455 conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
456 conversation.getMucOptions().setSubject(packet.findChildContent("subject"));
457 mXmppConnectionService.updateConversationUi();
458 return;
459 }
460 }
461
462 if (conversation != null && isMucStatusMessage) {
463 for (Element child : mucUserElement.getChildren()) {
464 if (child.getName().equals("status")
465 && MucOptions.STATUS_CODE_ROOM_CONFIG_CHANGED.equals(child.getAttribute("code"))) {
466 mXmppConnectionService.fetchConferenceConfiguration(conversation);
467 }
468 }
469 }
470 }
471 }
472
473 Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
474 if (received == null) {
475 received = packet.findChild("received", "urn:xmpp:receipts");
476 }
477 if (received != null && !packet.fromAccount(account)) {
478 mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
479 }
480 Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
481 if (displayed != null) {
482 if (packet.fromAccount(account)) {
483 Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
484 if (conversation != null) {
485 mXmppConnectionService.markRead(conversation);
486 }
487 } else {
488 updateLastseen(packet, account, true);
489 final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
490 Message message = displayedMessage == null ? null : displayedMessage.prev();
491 while (message != null
492 && message.getStatus() == Message.STATUS_SEND_RECEIVED
493 && message.getTimeSent() < displayedMessage.getTimeSent()) {
494 mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
495 message = message.prev();
496 }
497 }
498 }
499
500 Element event = packet.findChild("event", "http://jabber.org/protocol/pubsub#event");
501 if (event != null) {
502 parseEvent(event, from, account);
503 }
504
505 String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
506 if (nick != null) {
507 Contact contact = account.getRoster().getContact(from);
508 contact.setPresenceName(nick);
509 }
510 }
511}