package eu.siacs.conversations.parser; import android.util.Log; import net.java.otr4j.session.Session; import net.java.otr4j.session.SessionStatus; import eu.siacs.conversations.entities.Account; import eu.siacs.conversations.entities.Conversation; import eu.siacs.conversations.entities.Message; import eu.siacs.conversations.services.XmppConnectionService; import eu.siacs.conversations.utils.CryptoHelper; import eu.siacs.conversations.xml.Element; import eu.siacs.conversations.xmpp.stanzas.MessagePacket; public class MessageParser extends AbstractParser { public MessageParser(XmppConnectionService service) { super(service); } public Message parseChat(MessagePacket packet, Account account) { String[] fromParts = packet.getFrom().split("/"); Conversation conversation = mXmppConnectionService .findOrCreateConversation(account, fromParts[0], false); conversation.setLatestMarkableMessageId(getMarkableMessageId(packet)); updateLastseen(packet, account,true); String pgpBody = getPgpBody(packet); if (pgpBody != null) { return new Message(conversation, packet.getFrom(), pgpBody, Message.ENCRYPTION_PGP, Message.STATUS_RECIEVED); } else { return new Message(conversation, packet.getFrom(), packet.getBody(), Message.ENCRYPTION_NONE, Message.STATUS_RECIEVED); } } public Message parseOtrChat(MessagePacket packet, Account account) { boolean properlyAddressed = (packet.getTo().split("/").length == 2) || (account.countPresences() == 1); String[] fromParts = packet.getFrom().split("/"); Conversation conversation = mXmppConnectionService .findOrCreateConversation(account, fromParts[0], false); updateLastseen(packet, account,true); String body = packet.getBody(); if (!conversation.hasValidOtrSession()) { if (properlyAddressed) { conversation.startOtrSession( mXmppConnectionService.getApplicationContext(), fromParts[1], false); } else { return null; } } else { String foreignPresence = conversation.getOtrSession() .getSessionID().getUserID(); if (!foreignPresence.equals(fromParts[1])) { conversation.resetOtrSession(); if (properlyAddressed) { conversation.startOtrSession( mXmppConnectionService.getApplicationContext(), fromParts[1], false); } else { return null; } } } try { Session otrSession = conversation.getOtrSession(); SessionStatus before = otrSession.getSessionStatus(); body = otrSession.transformReceiving(body); SessionStatus after = otrSession.getSessionStatus(); if ((before != after) && (after == SessionStatus.ENCRYPTED)) { mXmppConnectionService.onOtrSessionEstablished(conversation); } else if ((before != after) && (after == SessionStatus.FINISHED)) { conversation.resetOtrSession(); } if ((body == null) || (body.isEmpty())) { return null; } if (body.startsWith(CryptoHelper.FILETRANSFER)) { String key = body.substring(CryptoHelper.FILETRANSFER.length()); conversation.setSymmetricKey(CryptoHelper.hexToBytes(key)); Log.d("xmppService","new symmetric key: "+CryptoHelper.bytesToHex(conversation.getSymmetricKey())); return null; } conversation.setLatestMarkableMessageId(getMarkableMessageId(packet)); Message finishedMessage = new Message(conversation, packet.getFrom(), body, Message.ENCRYPTION_OTR, Message.STATUS_RECIEVED); finishedMessage.setTime(getTimestamp(packet)); return finishedMessage; } catch (Exception e) { conversation.resetOtrSession(); return null; } } public Message parseGroupchat(MessagePacket packet, Account account) { int status; String[] fromParts = packet.getFrom().split("/"); Conversation conversation = mXmppConnectionService .findOrCreateConversation(account, fromParts[0], true); if (packet.hasChild("subject")) { conversation.getMucOptions().setSubject( packet.findChild("subject").getContent()); mXmppConnectionService.updateUi(conversation, false); return null; } if ((fromParts.length == 1)) { return null; } String counterPart = fromParts[1]; if (counterPart.equals(conversation.getMucOptions().getNick())) { if (mXmppConnectionService.markMessage(conversation, packet.getId(), Message.STATUS_SEND)) { return null; } else { status = Message.STATUS_SEND; } } else { status = Message.STATUS_RECIEVED; } String pgpBody = getPgpBody(packet); conversation.setLatestMarkableMessageId(getMarkableMessageId(packet)); Message finishedMessage; if (pgpBody == null) { finishedMessage = new Message(conversation, counterPart, packet.getBody(), Message.ENCRYPTION_NONE, status); } else { finishedMessage= new Message(conversation, counterPart, pgpBody, Message.ENCRYPTION_PGP, status); } finishedMessage.setTime(getTimestamp(packet)); return finishedMessage; } public Message parseCarbonMessage(MessagePacket packet, Account account) { int status; String fullJid; Element forwarded; if (packet.hasChild("received")) { forwarded = packet.findChild("received").findChild("forwarded"); status = Message.STATUS_RECIEVED; } else if (packet.hasChild("sent")) { forwarded = packet.findChild("sent").findChild("forwarded"); status = Message.STATUS_SEND; } else { return null; } if (forwarded == null) { return null; } Element message = forwarded.findChild("message"); if ((message == null) || (!message.hasChild("body"))) return null; // either malformed or boring if (status == Message.STATUS_RECIEVED) { fullJid = message.getAttribute("from"); updateLastseen(message, account,true); } else { fullJid = message.getAttribute("to"); } String[] parts = fullJid.split("/"); Conversation conversation = mXmppConnectionService .findOrCreateConversation(account, parts[0], false); conversation.setLatestMarkableMessageId(getMarkableMessageId(packet)); String pgpBody = getPgpBody(message); Message finishedMessage; if (pgpBody != null) { finishedMessage = new Message(conversation, fullJid, pgpBody,Message.ENCRYPTION_PGP, status); } else { String body = message.findChild("body").getContent(); finishedMessage= new Message(conversation, fullJid, body,Message.ENCRYPTION_NONE, status); } finishedMessage.setTime(getTimestamp(message)); return finishedMessage; } public void parseError(MessagePacket packet, Account account) { String[] fromParts = packet.getFrom().split("/"); mXmppConnectionService.markMessage(account, fromParts[0], packet.getId(), Message.STATUS_SEND_FAILED); } public void parseNormal(MessagePacket packet, Account account) { if (packet.hasChild("displayed","urn:xmpp:chat-markers:0")) { String id = packet.findChild("displayed","urn:xmpp:chat-markers:0").getAttribute("id"); String[] fromParts = packet.getFrom().split("/"); updateLastseen(packet, account,true); mXmppConnectionService.markMessage(account,fromParts[0], id, Message.STATUS_SEND_DISPLAYED); } else if (packet.hasChild("received","urn:xmpp:chat-markers:0")) { String id = packet.findChild("received","urn:xmpp:chat-markers:0").getAttribute("id"); String[] fromParts = packet.getFrom().split("/"); updateLastseen(packet, account,false); mXmppConnectionService.markMessage(account,fromParts[0], id, Message.STATUS_SEND_RECEIVED); } else if (packet.hasChild("x")) { Element x = packet.findChild("x"); if (x.hasChild("invite")) { Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, packet.getFrom(), true); mXmppConnectionService.updateUi(conversation, false); } } } private String getPgpBody(Element message) { Element child = message.findChild("x", "jabber:x:encrypted"); if (child == null) { return null; } else { return child.getContent(); } } private String getMarkableMessageId(Element message) { if (message.hasChild("markable", "urn:xmpp:chat-markers:0")) { return message.getAttribute("id"); } else { return null; } } }