1package eu.siacs.conversations.parser;
  2
  3import android.os.Build;
  4import android.text.Html;
  5import android.util.Log;
  6import android.util.Pair;
  7
  8import net.java.otr4j.session.Session;
  9import net.java.otr4j.session.SessionStatus;
 10
 11import java.text.SimpleDateFormat;
 12import java.util.ArrayList;
 13import java.util.Arrays;
 14import java.util.Date;
 15import java.util.List;
 16import java.util.Set;
 17import java.util.UUID;
 18
 19import eu.siacs.conversations.Config;
 20import eu.siacs.conversations.R;
 21import eu.siacs.conversations.crypto.OtrService;
 22import eu.siacs.conversations.crypto.axolotl.AxolotlService;
 23import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
 24import eu.siacs.conversations.entities.Account;
 25import eu.siacs.conversations.entities.Bookmark;
 26import eu.siacs.conversations.entities.Contact;
 27import eu.siacs.conversations.entities.Conversation;
 28import eu.siacs.conversations.entities.Message;
 29import eu.siacs.conversations.entities.MucOptions;
 30import eu.siacs.conversations.entities.Presence;
 31import eu.siacs.conversations.entities.ServiceDiscoveryResult;
 32import eu.siacs.conversations.http.HttpConnectionManager;
 33import eu.siacs.conversations.services.MessageArchiveService;
 34import eu.siacs.conversations.services.XmppConnectionService;
 35import eu.siacs.conversations.utils.CryptoHelper;
 36import eu.siacs.conversations.xml.Namespace;
 37import eu.siacs.conversations.xml.Element;
 38import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
 39import eu.siacs.conversations.xmpp.chatstate.ChatState;
 40import eu.siacs.conversations.xmpp.jid.Jid;
 41import eu.siacs.conversations.xmpp.pep.Avatar;
 42import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
 43
 44public class MessageParser extends AbstractParser implements OnMessagePacketReceived {
 45
 46	private static final List<String> CLIENTS_SENDING_HTML_IN_OTR = Arrays.asList("Pidgin","Adium","Trillian");
 47
 48	public MessageParser(XmppConnectionService service) {
 49		super(service);
 50	}
 51
 52	private boolean extractChatState(Conversation c, final boolean isTypeGroupChat, final MessagePacket packet) {
 53		ChatState state = ChatState.parse(packet);
 54		if (state != null && c != null) {
 55			final Account account = c.getAccount();
 56			Jid from = packet.getFrom();
 57			if (from.toBareJid().equals(account.getJid().toBareJid())) {
 58				c.setOutgoingChatState(state);
 59				if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
 60					mXmppConnectionService.markRead(c);
 61					activateGracePeriod(account);
 62				}
 63				return false;
 64			} else {
 65				if (isTypeGroupChat) {
 66					MucOptions.User user = c.getMucOptions().findUserByFullJid(from);
 67					if (user != null) {
 68						return user.setChatState(state);
 69					} else {
 70						return false;
 71					}
 72				} else {
 73					return c.setIncomingChatState(state);
 74				}
 75			}
 76		}
 77		return false;
 78	}
 79
 80	private Message parseOtrChat(String body, Jid from, String id, Conversation conversation) {
 81		String presence;
 82		if (from.isBareJid()) {
 83			presence = "";
 84		} else {
 85			presence = from.getResourcepart();
 86		}
 87		if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
 88			conversation.endOtrIfNeeded();
 89		}
 90		if (!conversation.hasValidOtrSession()) {
 91			conversation.startOtrSession(presence,false);
 92		} else {
 93			String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
 94			if (!foreignPresence.equals(presence)) {
 95				conversation.endOtrIfNeeded();
 96				conversation.startOtrSession(presence, false);
 97			}
 98		}
 99		try {
100			conversation.setLastReceivedOtrMessageId(id);
101			Session otrSession = conversation.getOtrSession();
102			body = otrSession.transformReceiving(body);
103			SessionStatus status = otrSession.getSessionStatus();
104			if (body == null && status == SessionStatus.ENCRYPTED) {
105				mXmppConnectionService.onOtrSessionEstablished(conversation);
106				return null;
107			} else if (body == null && status == SessionStatus.FINISHED) {
108				conversation.resetOtrSession();
109				mXmppConnectionService.updateConversationUi();
110				return null;
111			} else if (body == null || (body.isEmpty())) {
112				return null;
113			}
114			if (body.startsWith(CryptoHelper.FILETRANSFER)) {
115				String key = body.substring(CryptoHelper.FILETRANSFER.length());
116				conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
117				return null;
118			}
119			if (clientMightSendHtml(conversation.getAccount(), from)) {
120				Log.d(Config.LOGTAG,conversation.getAccount().getJid().toBareJid()+": received OTR message from bad behaving client. escaping HTML…");
121				if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
122					body = Html.fromHtml(body,Html.FROM_HTML_MODE_LEGACY).toString();
123				} else {
124					body = Html.fromHtml(body).toString();
125				}
126			}
127
128			final OtrService otrService = conversation.getAccount().getOtrService();
129			Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR, Message.STATUS_RECEIVED);
130			finishedMessage.setFingerprint(otrService.getFingerprint(otrSession.getRemotePublicKey()));
131			conversation.setLastReceivedOtrMessageId(null);
132
133			return finishedMessage;
134		} catch (Exception e) {
135			conversation.resetOtrSession();
136			return null;
137		}
138	}
139
140	private static boolean clientMightSendHtml(Account account, Jid from) {
141		String resource = from.getResourcepart();
142		if (resource == null) {
143			return false;
144		}
145		Presence presence = account.getRoster().getContact(from).getPresences().getPresences().get(resource);
146		ServiceDiscoveryResult disco = presence == null ? null : presence.getServiceDiscoveryResult();
147		if (disco == null) {
148			return false;
149		}
150		return hasIdentityKnowForSendingHtml(disco.getIdentities());
151	}
152
153	private static boolean hasIdentityKnowForSendingHtml(List<ServiceDiscoveryResult.Identity> identities) {
154		for(ServiceDiscoveryResult.Identity identity : identities) {
155			if (identity.getName() != null) {
156				if (CLIENTS_SENDING_HTML_IN_OTR.contains(identity.getName())) {
157					return true;
158				}
159			}
160		}
161		return false;
162	}
163
164	private Message parseAxolotlChat(Element axolotlMessage, Jid from,  Conversation conversation, int status) {
165		AxolotlService service = conversation.getAccount().getAxolotlService();
166		XmppAxolotlMessage xmppAxolotlMessage;
167		try {
168			xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.toBareJid());
169		} catch (Exception e) {
170			Log.d(Config.LOGTAG,conversation.getAccount().getJid().toBareJid()+": invalid omemo message received "+e.getMessage());
171			return null;
172		}
173		XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage);
174		if(plaintextMessage != null) {
175			Message finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
176			finishedMessage.setFingerprint(plaintextMessage.getFingerprint());
177			Log.d(Config.LOGTAG, AxolotlService.getLogprefix(finishedMessage.getConversation().getAccount())+" Received Message with session fingerprint: "+plaintextMessage.getFingerprint());
178			return finishedMessage;
179		} else {
180			return null;
181		}
182	}
183
184	private class Invite {
185		final Jid jid;
186		final String password;
187		final Contact inviter;
188		Invite(Jid jid, String password, Contact inviter) {
189			this.jid = jid;
190			this.password = password;
191			this.inviter = inviter;
192		}
193
194		public boolean execute(Account account) {
195			if (jid != null) {
196				Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true, false);
197				if (!conversation.getMucOptions().online()) {
198					conversation.getMucOptions().setPassword(password);
199					mXmppConnectionService.databaseBackend.updateConversation(conversation);
200					mXmppConnectionService.joinMuc(conversation, inviter != null && inviter.mutualPresenceSubscription());
201					mXmppConnectionService.updateConversationUi();
202				}
203				return true;
204			}
205			return false;
206		}
207	}
208
209	private Invite extractInvite(Account account, Element message) {
210		Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
211		if (x != null) {
212			Element invite = x.findChild("invite");
213			if (invite != null) {
214				Element pw = x.findChild("password");
215				Jid from = invite.getAttributeAsJid("from");
216				Contact contact = from == null ? null : account.getRoster().getContact(from);
217				return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent(): null, contact);
218			}
219		} else {
220			x = message.findChild("x","jabber:x:conference");
221			if (x != null) {
222				Jid from = message.getAttributeAsJid("from");
223				Contact contact = from == null ? null : account.getRoster().getContact(from);
224				return new Invite(x.getAttributeAsJid("jid"),x.getAttribute("password"),contact);
225			}
226		}
227		return null;
228	}
229
230	private static String extractStanzaId(Element packet, boolean isTypeGroupChat, Conversation conversation) {
231		final Jid by;
232		final boolean safeToExtract;
233		if (isTypeGroupChat) {
234			by = conversation.getJid().toBareJid();
235			safeToExtract = conversation.getMucOptions().hasFeature(Namespace.STANZA_IDS);
236		} else {
237			Account account = conversation.getAccount();
238			by = account.getJid().toBareJid();
239			safeToExtract = account.getXmppConnection().getFeatures().stanzaIds();
240		}
241		return safeToExtract ? extractStanzaId(packet, by) : null;
242	}
243
244	private static String extractStanzaId(Element packet, Jid by) {
245		for(Element child : packet.getChildren()) {
246			if (child.getName().equals("stanza-id")
247					&& Namespace.STANZA_IDS.equals(child.getNamespace())
248					&& by.equals(child.getAttributeAsJid("by"))) {
249				return child.getAttribute("id");
250			}
251		}
252		return null;
253	}
254
255	private void parseEvent(final Element event, final Jid from, final Account account) {
256		Element items = event.findChild("items");
257		String node = items == null ? null : items.getAttribute("node");
258		if ("urn:xmpp:avatar:metadata".equals(node)) {
259			Avatar avatar = Avatar.parseMetadata(items);
260			if (avatar != null) {
261				avatar.owner = from.toBareJid();
262				if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
263					if (account.getJid().toBareJid().equals(from)) {
264						if (account.setAvatar(avatar.getFilename())) {
265							mXmppConnectionService.databaseBackend.updateAccount(account);
266						}
267						mXmppConnectionService.getAvatarService().clear(account);
268						mXmppConnectionService.updateConversationUi();
269						mXmppConnectionService.updateAccountUi();
270					} else {
271						Contact contact = account.getRoster().getContact(from);
272						contact.setAvatar(avatar);
273						mXmppConnectionService.getAvatarService().clear(contact);
274						mXmppConnectionService.updateConversationUi();
275						mXmppConnectionService.updateRosterUi();
276					}
277				} else if (mXmppConnectionService.isDataSaverDisabled()) {
278					mXmppConnectionService.fetchAvatar(account, avatar);
279				}
280			}
281		} else if ("http://jabber.org/protocol/nick".equals(node)) {
282			Element i = items.findChild("item");
283			Element nick = i == null ? null : i.findChild("nick", "http://jabber.org/protocol/nick");
284			if (nick != null && nick.getContent() != null) {
285				Contact contact = account.getRoster().getContact(from);
286				contact.setPresenceName(nick.getContent());
287				mXmppConnectionService.getAvatarService().clear(account);
288				mXmppConnectionService.updateConversationUi();
289				mXmppConnectionService.updateAccountUi();
290			}
291		} else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
292
293			Element item = items.findChild("item");
294			Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
295			Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account)+"Received PEP device list ("+deviceIds+") update from "+ from + ", processing...");
296			AxolotlService axolotlService = account.getAxolotlService();
297			axolotlService.registerDevices(from, deviceIds);
298			mXmppConnectionService.updateAccountUi();
299		}
300	}
301
302	private boolean handleErrorMessage(Account account, MessagePacket packet) {
303		if (packet.getType() == MessagePacket.TYPE_ERROR) {
304			Jid from = packet.getFrom();
305			if (from != null) {
306				Message message = mXmppConnectionService.markMessage(account,
307						from.toBareJid(),
308						packet.getId(),
309						Message.STATUS_SEND_FAILED,
310						extractErrorMessage(packet));
311				if (message != null) {
312					if (message.getEncryption() == Message.ENCRYPTION_OTR) {
313						message.getConversation().endOtrIfNeeded();
314					}
315				}
316			}
317			return true;
318		}
319		return false;
320	}
321
322	@Override
323	public void onMessagePacketReceived(Account account, MessagePacket original) {
324		if (handleErrorMessage(account, original)) {
325			return;
326		}
327		final MessagePacket packet;
328		Long timestamp = null;
329		final boolean isForwarded;
330		boolean isCarbon = false;
331		String serverMsgId = null;
332		final Element fin = original.findChild("fin", Namespace.MAM_LEGACY);
333		if (fin != null) {
334			mXmppConnectionService.getMessageArchiveService().processFinLegacy(fin,original.getFrom());
335			return;
336		}
337		final boolean mamLegacy = original.hasChild("result", Namespace.MAM_LEGACY);
338		final Element result = original.findChild("result",mamLegacy ? Namespace.MAM_LEGACY : Namespace.MAM);
339		final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
340		if (query != null && query.validFrom(original.getFrom())) {
341			Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", mamLegacy ? Namespace.MAM_LEGACY : Namespace.MAM);
342			if (f == null) {
343				return;
344			}
345			timestamp = f.second;
346			packet = f.first;
347			isForwarded = true;
348			serverMsgId = result.getAttribute("id");
349			query.incrementMessageCount();
350		} else if (query != null) {
351			Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
352			return;
353		} else if (original.fromServer(account)) {
354			Pair<MessagePacket, Long> f;
355			f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
356			f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
357			packet = f != null ? f.first : original;
358			if (handleErrorMessage(account, packet)) {
359				return;
360			}
361			timestamp = f != null ? f.second : null;
362			isCarbon = f != null;
363			isForwarded = isCarbon;
364		} else {
365			packet = original;
366			isForwarded = false;
367		}
368
369		if (timestamp == null) {
370			timestamp = AbstractParser.parseTimestamp(original,AbstractParser.parseTimestamp(packet));
371		}
372		final String body = packet.getBody();
373		final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
374		final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
375		final Element replaceElement = packet.findChild("replace", "urn:xmpp:message-correct:0");
376		final Element oob = packet.findChild("x", Namespace.OOB);
377		final String oobUrl = oob != null ? oob.findChildContent("url") : null;
378		final String replacementId = replaceElement == null ? null : replaceElement.getAttribute("id");
379		final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
380		int status;
381		final Jid counterpart;
382		final Jid to = packet.getTo();
383		final Jid from = packet.getFrom();
384		final Element originId = packet.findChild("origin-id",Namespace.STANZA_IDS);
385		final String remoteMsgId;
386		if (originId != null && originId.getAttribute("id") != null) {
387			remoteMsgId = originId.getAttribute("id");
388		} else {
389			remoteMsgId = packet.getId();
390		}
391		boolean notify = false;
392
393		if (from == null) {
394			Log.d(Config.LOGTAG,"no from in: "+packet.toString());
395			return;
396		}
397		
398		boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
399		boolean isProperlyAddressed = (to != null ) && (!to.isBareJid() || account.countPresences() == 0);
400		boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
401		if (packet.fromAccount(account)) {
402			status = Message.STATUS_SEND;
403			counterpart = to != null ? to : account.getJid();
404		} else {
405			status = Message.STATUS_RECEIVED;
406			counterpart = from;
407		}
408
409		Invite invite = extractInvite(account, packet);
410		if (invite != null && invite.execute(account)) {
411			return;
412		}
413
414		if (query == null && extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), isTypeGroupChat, packet)) {
415			mXmppConnectionService.updateConversationUi();
416		}
417
418		if ((body != null || pgpEncrypted != null || axolotlEncrypted != null || oobUrl != null) && !isMucStatusMessage) {
419			final Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat, false, query, false);
420			final boolean conversationMultiMode = conversation.getMode() == Conversation.MODE_MULTI;
421
422			if (serverMsgId == null) {
423				serverMsgId = extractStanzaId(packet, isTypeGroupChat, conversation);
424			}
425
426			if (isTypeGroupChat) {
427				if (conversation.getMucOptions().isSelf(counterpart)) {
428					status = Message.STATUS_SEND_RECEIVED;
429					isCarbon = true; //not really carbon but received from another resource
430					if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status, serverMsgId)) {
431						return;
432					} else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
433						Message message = conversation.findSentMessageWithBody(packet.getBody());
434						if (message != null) {
435							mXmppConnectionService.markMessage(message, status);
436							return;
437						}
438					}
439				} else {
440					status = Message.STATUS_RECEIVED;
441				}
442			}
443			final Message message;
444			if (body != null && body.startsWith("?OTR") && Config.supportOtr()) {
445				if (!isForwarded && !isTypeGroupChat && isProperlyAddressed && !conversationMultiMode) {
446					message = parseOtrChat(body, from, remoteMsgId, conversation);
447					if (message == null) {
448						return;
449					}
450				} else {
451					Log.d(Config.LOGTAG,account.getJid().toBareJid()+": ignoring OTR message from "+from+" isForwarded="+Boolean.toString(isForwarded)+", isProperlyAddressed="+Boolean.valueOf(isProperlyAddressed));
452					message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
453				}
454			} else if (pgpEncrypted != null && Config.supportOpenPgp()) {
455				message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
456			} else if (axolotlEncrypted != null && Config.supportOmemo()) {
457				Jid origin;
458				if (conversationMultiMode) {
459					final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
460					origin = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
461					if (origin == null) {
462						Log.d(Config.LOGTAG, "axolotl message in non anonymous conference received");
463						return;
464					}
465				} else {
466					origin = from;
467				}
468				message = parseAxolotlChat(axolotlEncrypted, origin, conversation, status);
469				if (message == null) {
470					return;
471				}
472				if (conversationMultiMode) {
473					message.setTrueCounterpart(origin);
474				}
475			} else if (body == null && oobUrl != null) {
476				message = new Message(conversation, oobUrl, Message.ENCRYPTION_NONE, status);
477				message.setOob(true);
478				if (CryptoHelper.isPgpEncryptedUrl(oobUrl)) {
479					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
480				}
481			} else {
482				message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
483			}
484
485			message.setCounterpart(counterpart);
486			message.setRemoteMsgId(remoteMsgId);
487			message.setServerMsgId(serverMsgId);
488			message.setCarbon(isCarbon);
489			message.setTime(timestamp);
490			if (body != null && body.equals(oobUrl)) {
491				message.setOob(true);
492				if (CryptoHelper.isPgpEncryptedUrl(oobUrl)) {
493					message.setEncryption(Message.ENCRYPTION_DECRYPTED);
494				}
495			}
496			message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
497			if (conversationMultiMode) {
498				final Jid fallback = conversation.getMucOptions().getTrueCounterpart(counterpart);
499				Jid trueCounterpart;
500				if (message.getEncryption() == Message.ENCRYPTION_AXOLOTL) {
501					trueCounterpart = message.getTrueCounterpart();
502				} else if (Config.PARSE_REAL_JID_FROM_MUC_MAM) {
503					trueCounterpart = getTrueCounterpart(query != null ? mucUserElement : null, fallback);
504				} else {
505					trueCounterpart = fallback;
506				}
507				if (trueCounterpart != null && trueCounterpart.toBareJid().equals(account.getJid().toBareJid())) {
508					status = isTypeGroupChat ? Message.STATUS_SEND_RECEIVED : Message.STATUS_SEND;
509				}
510				message.setStatus(status);
511				message.setTrueCounterpart(trueCounterpart);
512				if (!isTypeGroupChat) {
513					message.setType(Message.TYPE_PRIVATE);
514				}
515			} else {
516				updateLastseen(account, from);
517			}
518
519			if (replacementId != null && mXmppConnectionService.allowMessageCorrection()) {
520				Message replacedMessage = conversation.findMessageWithRemoteIdAndCounterpart(replacementId,
521						counterpart,
522						message.getStatus() == Message.STATUS_RECEIVED,
523						message.isCarbon());
524				if (replacedMessage != null) {
525					final boolean fingerprintsMatch = replacedMessage.getFingerprint() == null
526							|| replacedMessage.getFingerprint().equals(message.getFingerprint());
527					final boolean trueCountersMatch = replacedMessage.getTrueCounterpart() != null
528							&& replacedMessage.getTrueCounterpart().equals(message.getTrueCounterpart());
529					final boolean duplicate = conversation.hasDuplicateMessage(message);
530					if (fingerprintsMatch && (trueCountersMatch || !conversationMultiMode) && !duplicate) {
531						Log.d(Config.LOGTAG, "replaced message '" + replacedMessage.getBody() + "' with '" + message.getBody() + "'");
532						synchronized (replacedMessage) {
533							final String uuid = replacedMessage.getUuid();
534							replacedMessage.setUuid(UUID.randomUUID().toString());
535							replacedMessage.setBody(message.getBody());
536							replacedMessage.setEdited(replacedMessage.getRemoteMsgId());
537							replacedMessage.setRemoteMsgId(remoteMsgId);
538							replacedMessage.setEncryption(message.getEncryption());
539							if (replacedMessage.getStatus() == Message.STATUS_RECEIVED) {
540								replacedMessage.markUnread();
541							}
542							mXmppConnectionService.updateMessage(replacedMessage, uuid);
543							mXmppConnectionService.getNotificationService().updateNotification(false);
544							if (mXmppConnectionService.confirmMessages()
545									&& (replacedMessage.trusted() || replacedMessage.getType() == Message.TYPE_PRIVATE)
546									&& remoteMsgId != null
547									&& !isForwarded
548									&& !isTypeGroupChat) {
549								sendMessageReceipts(account, packet);
550							}
551							if (replacedMessage.getEncryption() == Message.ENCRYPTION_PGP) {
552								conversation.getAccount().getPgpDecryptionService().discard(replacedMessage);
553								conversation.getAccount().getPgpDecryptionService().decrypt(replacedMessage, false);
554							}
555						}
556						return;
557					} else {
558						Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received message correction but verification didn't check out");
559					}
560				}
561			}
562
563			long deletionDate = mXmppConnectionService.getAutomaticMessageDeletionDate();
564			if (deletionDate != 0 && message.getTimeSent() < deletionDate) {
565				Log.d(Config.LOGTAG,account.getJid().toBareJid()+": skipping message from "+message.getCounterpart().toString()+" because it was sent prior to our deletion date");
566				return;
567			}
568
569			boolean checkForDuplicates = (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
570					|| message.getType() == Message.TYPE_PRIVATE
571					|| message.getServerMsgId() != null;
572			if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
573				Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
574				return;
575			}
576
577			if (query != null && query.getPagingOrder() == MessageArchiveService.PagingOrder.REVERSE) {
578				conversation.prepend(message);
579			} else {
580				conversation.add(message);
581			}
582			if (query != null) {
583				query.incrementActualMessageCount();
584			}
585
586			if (query == null || query.isCatchup()) { //either no mam or catchup
587				if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
588					mXmppConnectionService.markRead(conversation);
589					if (query == null) {
590						activateGracePeriod(account);
591					}
592				} else {
593					message.markUnread();
594					notify = true;
595				}
596			}
597
598			if (message.getEncryption() == Message.ENCRYPTION_PGP) {
599				notify = conversation.getAccount().getPgpDecryptionService().decrypt(message, notify);
600			}
601
602			if (query == null) {
603				mXmppConnectionService.updateConversationUi();
604			}
605
606			if (mXmppConnectionService.confirmMessages()
607					&& (message.trusted() || message.getType() == Message.TYPE_PRIVATE)
608					&& remoteMsgId != null
609					&& !isForwarded
610					&& !isTypeGroupChat) {
611				sendMessageReceipts(account, packet);
612			}
613
614			if (message.getStatus() == Message.STATUS_RECEIVED
615					&& conversation.getOtrSession() != null
616					&& !conversation.getOtrSession().getSessionID().getUserID()
617					.equals(message.getCounterpart().getResourcepart())) {
618				conversation.endOtrIfNeeded();
619			}
620
621			mXmppConnectionService.databaseBackend.createMessage(message);
622			final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
623			if (message.trusted() && message.treatAsDownloadable() && manager.getAutoAcceptFileSize() > 0) {
624				manager.createNewDownloadConnection(message);
625			} else if (notify) {
626				if (query != null && query.isCatchup()) {
627					mXmppConnectionService.getNotificationService().pushFromBacklog(message);
628				} else {
629					mXmppConnectionService.getNotificationService().push(message);
630				}
631			}
632		} else if (!packet.hasChild("body")){ //no body
633			final Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
634			if (isTypeGroupChat) {
635				if (packet.hasChild("subject")) {
636					if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
637						conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
638						String subject = packet.findChildContent("subject");
639						conversation.getMucOptions().setSubject(subject);
640						final Bookmark bookmark = conversation.getBookmark();
641						if (bookmark != null && bookmark.getBookmarkName() == null) {
642							if (bookmark.setBookmarkName(subject)) {
643								mXmppConnectionService.pushBookmarks(account);
644							}
645						}
646						mXmppConnectionService.updateConversationUi();
647						return;
648					}
649				}
650			}
651			if (conversation != null && mucUserElement != null && from.isBareJid()) {
652				for (Element child : mucUserElement.getChildren()) {
653					if ("status".equals(child.getName())) {
654						try {
655							int code = Integer.parseInt(child.getAttribute("code"));
656							if ((code >= 170 && code <= 174) || (code >= 102 && code <= 104)) {
657								mXmppConnectionService.fetchConferenceConfiguration(conversation);
658								break;
659							}
660						} catch (Exception e) {
661							//ignored
662						}
663					} else if ("item".equals(child.getName())) {
664						MucOptions.User user = AbstractParser.parseItem(conversation,child);
665						Log.d(Config.LOGTAG,account.getJid()+": changing affiliation for "
666								+user.getRealJid()+" to "+user.getAffiliation()+" in "
667								+conversation.getJid().toBareJid());
668						if (!user.realJidMatchesAccount()) {
669							conversation.getMucOptions().updateUser(user);
670							mXmppConnectionService.getAvatarService().clear(conversation);
671							mXmppConnectionService.updateMucRosterUi();
672							mXmppConnectionService.updateConversationUi();
673							if (!user.getAffiliation().ranks(MucOptions.Affiliation.MEMBER)) {
674								Jid jid = user.getRealJid();
675								List<Jid> cryptoTargets = conversation.getAcceptedCryptoTargets();
676								if (cryptoTargets.remove(user.getRealJid())) {
677									Log.d(Config.LOGTAG,account.getJid().toBareJid()+": removed "+jid+" from crypto targets of "+conversation.getName());
678									conversation.setAcceptedCryptoTargets(cryptoTargets);
679									mXmppConnectionService.updateConversation(conversation);
680								}
681							}
682						}
683					}
684				}
685			}
686		}
687
688
689
690		Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
691		if (received == null) {
692			received = packet.findChild("received", "urn:xmpp:receipts");
693		}
694		if (received != null && !packet.fromAccount(account)) {
695			mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
696		}
697		Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
698		if (displayed != null) {
699			if (packet.fromAccount(account)) {
700				Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
701				if (conversation != null && (query == null || query.isCatchup())) {
702					mXmppConnectionService.markRead(conversation);
703				}
704			} else {
705				final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
706				Message message = displayedMessage == null ? null : displayedMessage.prev();
707				while (message != null
708						&& message.getStatus() == Message.STATUS_SEND_RECEIVED
709						&& message.getTimeSent() < displayedMessage.getTimeSent()) {
710					mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
711					message = message.prev();
712				}
713			}
714		}
715
716		Element event = original.findChild("event", "http://jabber.org/protocol/pubsub#event");
717		if (event != null) {
718			parseEvent(event, original.getFrom(), account);
719		}
720
721		String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
722		if (nick != null) {
723			Contact contact = account.getRoster().getContact(from);
724			contact.setPresenceName(nick);
725		}
726	}
727
728	private static Jid getTrueCounterpart(Element mucUserElement, Jid fallback) {
729		final Element item = mucUserElement == null ? null : mucUserElement.findChild("item");
730		Jid result = item == null ? null : item.getAttributeAsJid("jid");
731		return result != null ? result : fallback;
732	}
733
734	private void sendMessageReceipts(Account account, MessagePacket packet) {
735		ArrayList<String> receiptsNamespaces = new ArrayList<>();
736		if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
737			receiptsNamespaces.add("urn:xmpp:chat-markers:0");
738		}
739		if (packet.hasChild("request", "urn:xmpp:receipts")) {
740			receiptsNamespaces.add("urn:xmpp:receipts");
741		}
742		if (receiptsNamespaces.size() > 0) {
743			MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
744					packet,
745					receiptsNamespaces,
746					packet.getType());
747			mXmppConnectionService.sendMessagePacket(account, receipt);
748		}
749	}
750
751	private static SimpleDateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm:ss");
752
753	private void activateGracePeriod(Account account) {
754
755		long duration;
756		long defaultValue = mXmppConnectionService.getResources().getInteger(R.integer.grace_period);
757		try {
758			duration = Long.parseLong(mXmppConnectionService.getPreferences().getString("grace_period_length", String.valueOf(defaultValue))) * 1000;
759		} catch (NumberFormatException e) {
760			duration = defaultValue * 1000;
761		}
762		Log.d(Config.LOGTAG,account.getJid().toBareJid()+": activating grace period ("+duration+") till "+TIME_FORMAT.format(new Date(System.currentTimeMillis() + duration)));
763		account.activateGracePeriod(duration);
764	}
765}