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.setAxolotlSession(plaintextMessage.getSession());
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, "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 mXmppConnectionService.markMessage(account, from.toBareJid(), packet.getId(), Message.STATUS_SEND_FAILED);
206 }
207 return true;
208 }
209 return false;
210 }
211
212 @Override
213 public void onMessagePacketReceived(Account account, MessagePacket original) {
214 if (handleErrorMessage(account, original)) {
215 return;
216 }
217 final MessagePacket packet;
218 Long timestamp = null;
219 final boolean isForwarded;
220 String serverMsgId = null;
221 final Element fin = original.findChild("fin", "urn:xmpp:mam:0");
222 if (fin != null) {
223 mXmppConnectionService.getMessageArchiveService().processFin(fin,original.getFrom());
224 return;
225 }
226 final Element result = original.findChild("result","urn:xmpp:mam:0");
227 final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
228 if (query != null && query.validFrom(original.getFrom())) {
229 Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", "urn:xmpp:mam:0");
230 if (f == null) {
231 return;
232 }
233 timestamp = f.second;
234 packet = f.first;
235 isForwarded = true;
236 serverMsgId = result.getAttribute("id");
237 query.incrementTotalCount();
238 } else if (query != null) {
239 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
240 return;
241 } else if (original.fromServer(account)) {
242 Pair<MessagePacket, Long> f;
243 f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
244 f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
245 packet = f != null ? f.first : original;
246 if (handleErrorMessage(account, packet)) {
247 return;
248 }
249 timestamp = f != null ? f.second : null;
250 isForwarded = f != null;
251 } else {
252 packet = original;
253 isForwarded = false;
254 }
255
256 if (timestamp == null) {
257 timestamp = AbstractParser.getTimestamp(packet, System.currentTimeMillis());
258 }
259 final String body = packet.getBody();
260 final Element mucUserElement = packet.findChild("x","http://jabber.org/protocol/muc#user");
261 final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
262 final Element axolotlEncrypted = packet.findChild("axolotl_message", AxolotlService.PEP_PREFIX);
263 int status;
264 final Jid counterpart;
265 final Jid to = packet.getTo();
266 final Jid from = packet.getFrom();
267 final String remoteMsgId = packet.getId();
268
269 if (from == null || to == null) {
270 Log.d(Config.LOGTAG,"no to or from in: "+packet.toString());
271 return;
272 }
273
274 boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
275 boolean isProperlyAddressed = !to.isBareJid() || account.countPresences() == 1;
276 boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
277 if (packet.fromAccount(account)) {
278 status = Message.STATUS_SEND;
279 counterpart = to;
280 } else {
281 status = Message.STATUS_RECEIVED;
282 counterpart = from;
283 }
284
285 Invite invite = extractInvite(packet);
286 if (invite != null && invite.execute(account)) {
287 return;
288 }
289
290 if (extractChatState(mXmppConnectionService.find(account, from), packet)) {
291 mXmppConnectionService.updateConversationUi();
292 }
293
294 if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
295 Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat);
296 if (isTypeGroupChat) {
297 if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
298 status = Message.STATUS_SEND_RECEIVED;
299 if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
300 return;
301 } else {
302 Message message = conversation.findSentMessageWithBody(body);
303 if (message != null) {
304 message.setRemoteMsgId(remoteMsgId);
305 mXmppConnectionService.markMessage(message, status);
306 return;
307 }
308 }
309 } else {
310 status = Message.STATUS_RECEIVED;
311 }
312 }
313 Message message;
314 if (body != null && body.startsWith("?OTR")) {
315 if (!isForwarded && !isTypeGroupChat && isProperlyAddressed) {
316 message = parseOtrChat(body, from, remoteMsgId, conversation);
317 if (message == null) {
318 return;
319 }
320 } else {
321 message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
322 }
323 } else if (pgpEncrypted != null) {
324 message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
325 } else if (axolotlEncrypted != null) {
326 message = parseAxolotlChat(axolotlEncrypted, from, remoteMsgId, conversation, status);
327 if (message == null) {
328 return;
329 }
330 } else {
331 message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
332 }
333 message.setCounterpart(counterpart);
334 message.setRemoteMsgId(remoteMsgId);
335 message.setServerMsgId(serverMsgId);
336 message.setTime(timestamp);
337 message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
338 if (conversation.getMode() == Conversation.MODE_MULTI) {
339 message.setTrueCounterpart(conversation.getMucOptions().getTrueCounterpart(counterpart.getResourcepart()));
340 if (!isTypeGroupChat) {
341 message.setType(Message.TYPE_PRIVATE);
342 }
343 }
344 updateLastseen(packet,account,true);
345 boolean checkForDuplicates = serverMsgId != null
346 || (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
347 || message.getType() == Message.TYPE_PRIVATE;
348 if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
349 Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
350 return;
351 }
352 if (query != null) {
353 query.incrementMessageCount();
354 }
355 conversation.add(message);
356 if (serverMsgId == null) {
357 if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
358 mXmppConnectionService.markRead(conversation);
359 account.activateGracePeriod();
360 } else {
361 message.markUnread();
362 }
363 mXmppConnectionService.updateConversationUi();
364 }
365
366 if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded) {
367 if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
368 MessagePacket receipt = mXmppConnectionService
369 .getMessageGenerator().received(account, packet, "urn:xmpp:chat-markers:0");
370 mXmppConnectionService.sendMessagePacket(account, receipt);
371 }
372 if (packet.hasChild("request", "urn:xmpp:receipts")) {
373 MessagePacket receipt = mXmppConnectionService
374 .getMessageGenerator().received(account, packet, "urn:xmpp:receipts");
375 mXmppConnectionService.sendMessagePacket(account, receipt);
376 }
377 }
378 if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
379 if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
380 mXmppConnectionService.updateConversation(conversation);
381 }
382 }
383
384 if (message.getStatus() == Message.STATUS_RECEIVED
385 && conversation.getOtrSession() != null
386 && !conversation.getOtrSession().getSessionID().getUserID()
387 .equals(message.getCounterpart().getResourcepart())) {
388 conversation.endOtrIfNeeded();
389 }
390
391 if (message.getEncryption() == Message.ENCRYPTION_NONE || mXmppConnectionService.saveEncryptedMessages()) {
392 mXmppConnectionService.databaseBackend.createMessage(message);
393 }
394 final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
395 if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
396 manager.createNewDownloadConnection(message);
397 } else if (!message.isRead()) {
398 mXmppConnectionService.getNotificationService().push(message);
399 }
400 } else { //no body
401 if (isTypeGroupChat) {
402 Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
403 if (packet.hasChild("subject")) {
404 if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
405 conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
406 conversation.getMucOptions().setSubject(packet.findChildContent("subject"));
407 mXmppConnectionService.updateConversationUi();
408 return;
409 }
410 }
411
412 if (conversation != null && isMucStatusMessage) {
413 for (Element child : mucUserElement.getChildren()) {
414 if (child.getName().equals("status")
415 && MucOptions.STATUS_CODE_ROOM_CONFIG_CHANGED.equals(child.getAttribute("code"))) {
416 mXmppConnectionService.fetchConferenceConfiguration(conversation);
417 }
418 }
419 }
420 }
421 }
422
423 Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
424 if (received == null) {
425 received = packet.findChild("received", "urn:xmpp:receipts");
426 }
427 if (received != null && !packet.fromAccount(account)) {
428 mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
429 }
430 Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
431 if (displayed != null) {
432 if (packet.fromAccount(account)) {
433 Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
434 if (conversation != null) {
435 mXmppConnectionService.markRead(conversation);
436 }
437 } else {
438 updateLastseen(packet, account, true);
439 final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
440 Message message = displayedMessage == null ? null : displayedMessage.prev();
441 while (message != null
442 && message.getStatus() == Message.STATUS_SEND_RECEIVED
443 && message.getTimeSent() < displayedMessage.getTimeSent()) {
444 mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
445 message = message.prev();
446 }
447 }
448 }
449
450 Element event = packet.findChild("event", "http://jabber.org/protocol/pubsub#event");
451 if (event != null) {
452 parseEvent(event, from, account);
453 }
454
455 String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
456 if (nick != null) {
457 Contact contact = account.getRoster().getContact(from);
458 contact.setPresenceName(nick);
459 }
460 }
461}