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