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