conversations-classic/src/main/java/eu/siacs/conversations/parser/MessageParser.java
Daniel Gultsch 6a458b853c Merge pull request #1513 from fiaxh/pgp_background_decryption
PGP messages background decryption
2015-10-30 10:18:27 +01:00

495 lines
19 KiB
Java

package eu.siacs.conversations.parser;
import android.util.Log;
import android.util.Pair;
import eu.siacs.conversations.crypto.PgpDecryptionService;
import net.java.otr4j.session.Session;
import net.java.otr4j.session.SessionStatus;
import java.util.Set;
import eu.siacs.conversations.Config;
import eu.siacs.conversations.crypto.axolotl.AxolotlService;
import eu.siacs.conversations.crypto.axolotl.XmppAxolotlMessage;
import eu.siacs.conversations.entities.Account;
import eu.siacs.conversations.entities.Contact;
import eu.siacs.conversations.entities.Conversation;
import eu.siacs.conversations.entities.Message;
import eu.siacs.conversations.entities.MucOptions;
import eu.siacs.conversations.http.HttpConnectionManager;
import eu.siacs.conversations.services.MessageArchiveService;
import eu.siacs.conversations.services.XmppConnectionService;
import eu.siacs.conversations.utils.CryptoHelper;
import eu.siacs.conversations.xml.Element;
import eu.siacs.conversations.xmpp.OnMessagePacketReceived;
import eu.siacs.conversations.xmpp.chatstate.ChatState;
import eu.siacs.conversations.xmpp.jid.Jid;
import eu.siacs.conversations.xmpp.pep.Avatar;
import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
public class MessageParser extends AbstractParser implements
OnMessagePacketReceived {
public MessageParser(XmppConnectionService service) {
super(service);
}
private boolean extractChatState(Conversation conversation, final MessagePacket packet) {
ChatState state = ChatState.parse(packet);
if (state != null && conversation != null) {
final Account account = conversation.getAccount();
Jid from = packet.getFrom();
if (from.toBareJid().equals(account.getJid().toBareJid())) {
conversation.setOutgoingChatState(state);
if (state == ChatState.ACTIVE || state == ChatState.COMPOSING) {
mXmppConnectionService.markRead(conversation);
account.activateGracePeriod();
}
return false;
} else {
return conversation.setIncomingChatState(state);
}
}
return false;
}
private Message parseOtrChat(String body, Jid from, String id, Conversation conversation) {
String presence;
if (from.isBareJid()) {
presence = "";
} else {
presence = from.getResourcepart();
}
if (body.matches("^\\?OTRv\\d{1,2}\\?.*")) {
conversation.endOtrIfNeeded();
}
if (!conversation.hasValidOtrSession()) {
conversation.startOtrSession(presence,false);
} else {
String foreignPresence = conversation.getOtrSession().getSessionID().getUserID();
if (!foreignPresence.equals(presence)) {
conversation.endOtrIfNeeded();
conversation.startOtrSession(presence, false);
}
}
try {
conversation.setLastReceivedOtrMessageId(id);
Session otrSession = conversation.getOtrSession();
body = otrSession.transformReceiving(body);
SessionStatus status = otrSession.getSessionStatus();
if (body == null && status == SessionStatus.ENCRYPTED) {
mXmppConnectionService.onOtrSessionEstablished(conversation);
return null;
} else if (body == null && status == SessionStatus.FINISHED) {
conversation.resetOtrSession();
mXmppConnectionService.updateConversationUi();
return null;
} else if (body == null || (body.isEmpty())) {
return null;
}
if (body.startsWith(CryptoHelper.FILETRANSFER)) {
String key = body.substring(CryptoHelper.FILETRANSFER.length());
conversation.setSymmetricKey(CryptoHelper.hexToBytes(key));
return null;
}
Message finishedMessage = new Message(conversation, body, Message.ENCRYPTION_OTR, Message.STATUS_RECEIVED);
conversation.setLastReceivedOtrMessageId(null);
return finishedMessage;
} catch (Exception e) {
conversation.resetOtrSession();
return null;
}
}
private Message parseAxolotlChat(Element axolotlMessage, Jid from, String id, Conversation conversation, int status) {
Message finishedMessage = null;
AxolotlService service = conversation.getAccount().getAxolotlService();
XmppAxolotlMessage xmppAxolotlMessage = XmppAxolotlMessage.fromElement(axolotlMessage, from.toBareJid());
XmppAxolotlMessage.XmppAxolotlPlaintextMessage plaintextMessage = service.processReceivingPayloadMessage(xmppAxolotlMessage);
if(plaintextMessage != null) {
finishedMessage = new Message(conversation, plaintextMessage.getPlaintext(), Message.ENCRYPTION_AXOLOTL, status);
finishedMessage.setAxolotlFingerprint(plaintextMessage.getFingerprint());
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(finishedMessage.getConversation().getAccount())+" Received Message with session fingerprint: "+plaintextMessage.getFingerprint());
}
return finishedMessage;
}
private Message parsePGPChat(final Conversation conversation, String pgpEncrypted, int status) {
final Message message = new Message(conversation, pgpEncrypted, Message.ENCRYPTION_PGP, status);
PgpDecryptionService pgpDecryptionService = conversation.getAccount().getPgpDecryptionService();
pgpDecryptionService.add(message);
return message;
}
private class Invite {
Jid jid;
String password;
Invite(Jid jid, String password) {
this.jid = jid;
this.password = password;
}
public boolean execute(Account account) {
if (jid != null) {
Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, jid, true);
if (!conversation.getMucOptions().online()) {
conversation.getMucOptions().setPassword(password);
mXmppConnectionService.databaseBackend.updateConversation(conversation);
mXmppConnectionService.joinMuc(conversation);
mXmppConnectionService.updateConversationUi();
}
return true;
}
return false;
}
}
private Invite extractInvite(Element message) {
Element x = message.findChild("x", "http://jabber.org/protocol/muc#user");
if (x != null) {
Element invite = x.findChild("invite");
if (invite != null) {
Element pw = x.findChild("password");
return new Invite(message.getAttributeAsJid("from"), pw != null ? pw.getContent(): null);
}
} else {
x = message.findChild("x","jabber:x:conference");
if (x != null) {
return new Invite(x.getAttributeAsJid("jid"),x.getAttribute("password"));
}
}
return null;
}
private void parseEvent(final Element event, final Jid from, final Account account) {
Element items = event.findChild("items");
String node = items == null ? null : items.getAttribute("node");
if ("urn:xmpp:avatar:metadata".equals(node)) {
Avatar avatar = Avatar.parseMetadata(items);
if (avatar != null) {
avatar.owner = from;
if (mXmppConnectionService.getFileBackend().isAvatarCached(avatar)) {
if (account.getJid().toBareJid().equals(from)) {
if (account.setAvatar(avatar.getFilename())) {
mXmppConnectionService.databaseBackend.updateAccount(account);
}
mXmppConnectionService.getAvatarService().clear(account);
mXmppConnectionService.updateConversationUi();
mXmppConnectionService.updateAccountUi();
} else {
Contact contact = account.getRoster().getContact(from);
contact.setAvatar(avatar);
mXmppConnectionService.getAvatarService().clear(contact);
mXmppConnectionService.updateConversationUi();
mXmppConnectionService.updateRosterUi();
}
} else {
mXmppConnectionService.fetchAvatar(account, avatar);
}
}
} else if ("http://jabber.org/protocol/nick".equals(node)) {
Element i = items.findChild("item");
Element nick = i == null ? null : i.findChild("nick", "http://jabber.org/protocol/nick");
if (nick != null && nick.getContent() != null) {
Contact contact = account.getRoster().getContact(from);
contact.setPresenceName(nick.getContent());
mXmppConnectionService.getAvatarService().clear(account);
mXmppConnectionService.updateConversationUi();
mXmppConnectionService.updateAccountUi();
}
} else if (AxolotlService.PEP_DEVICE_LIST.equals(node)) {
Log.d(Config.LOGTAG, AxolotlService.getLogprefix(account)+"Received PEP device list update from "+ from + ", processing...");
Element item = items.findChild("item");
Set<Integer> deviceIds = mXmppConnectionService.getIqParser().deviceIds(item);
AxolotlService axolotlService = account.getAxolotlService();
axolotlService.registerDevices(from, deviceIds);
mXmppConnectionService.updateAccountUi();
}
}
private boolean handleErrorMessage(Account account, MessagePacket packet) {
if (packet.getType() == MessagePacket.TYPE_ERROR) {
Jid from = packet.getFrom();
if (from != null) {
Element error = packet.findChild("error");
String text = error == null ? null : error.findChildContent("text");
if (text != null) {
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + text);
} else if (error != null) {
Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": sending message to "+ from+ " failed - " + error);
}
Message message = mXmppConnectionService.markMessage(account,
from.toBareJid(),
packet.getId(),
Message.STATUS_SEND_FAILED);
if (message != null && message.getEncryption() == Message.ENCRYPTION_OTR) {
message.getConversation().endOtrIfNeeded();
}
}
return true;
}
return false;
}
@Override
public void onMessagePacketReceived(Account account, MessagePacket original) {
if (handleErrorMessage(account, original)) {
return;
}
final MessagePacket packet;
Long timestamp = null;
final boolean isForwarded;
boolean isCarbon = false;
String serverMsgId = null;
final Element fin = original.findChild("fin", "urn:xmpp:mam:0");
if (fin != null) {
mXmppConnectionService.getMessageArchiveService().processFin(fin,original.getFrom());
return;
}
final Element result = original.findChild("result","urn:xmpp:mam:0");
final MessageArchiveService.Query query = result == null ? null : mXmppConnectionService.getMessageArchiveService().findQuery(result.getAttribute("queryid"));
if (query != null && query.validFrom(original.getFrom())) {
Pair<MessagePacket, Long> f = original.getForwardedMessagePacket("result", "urn:xmpp:mam:0");
if (f == null) {
return;
}
timestamp = f.second;
packet = f.first;
isForwarded = true;
serverMsgId = result.getAttribute("id");
query.incrementTotalCount();
} else if (query != null) {
Log.d(Config.LOGTAG,account.getJid().toBareJid()+": received mam result from invalid sender");
return;
} else if (original.fromServer(account)) {
Pair<MessagePacket, Long> f;
f = original.getForwardedMessagePacket("received", "urn:xmpp:carbons:2");
f = f == null ? original.getForwardedMessagePacket("sent", "urn:xmpp:carbons:2") : f;
packet = f != null ? f.first : original;
if (handleErrorMessage(account, packet)) {
return;
}
timestamp = f != null ? f.second : null;
isCarbon = f != null;
isForwarded = isCarbon;
} else {
packet = original;
isForwarded = false;
}
if (timestamp == null) {
timestamp = AbstractParser.getTimestamp(packet, System.currentTimeMillis());
}
final String body = packet.getBody();
final Element mucUserElement = packet.findChild("x", "http://jabber.org/protocol/muc#user");
final String pgpEncrypted = packet.findChildContent("x", "jabber:x:encrypted");
final Element axolotlEncrypted = packet.findChild(XmppAxolotlMessage.CONTAINERTAG, AxolotlService.PEP_PREFIX);
int status;
final Jid counterpart;
final Jid to = packet.getTo();
final Jid from = packet.getFrom();
final String remoteMsgId = packet.getId();
if (from == null || to == null) {
Log.d(Config.LOGTAG,"no to or from in: "+packet.toString());
return;
}
boolean isTypeGroupChat = packet.getType() == MessagePacket.TYPE_GROUPCHAT;
boolean isProperlyAddressed = !to.isBareJid() || account.countPresences() == 1;
boolean isMucStatusMessage = from.isBareJid() && mucUserElement != null && mucUserElement.hasChild("status");
if (packet.fromAccount(account)) {
status = Message.STATUS_SEND;
counterpart = to;
} else {
status = Message.STATUS_RECEIVED;
counterpart = from;
}
Invite invite = extractInvite(packet);
if (invite != null && invite.execute(account)) {
return;
}
if (extractChatState(mXmppConnectionService.find(account, counterpart.toBareJid()), packet)) {
mXmppConnectionService.updateConversationUi();
}
if ((body != null || pgpEncrypted != null || axolotlEncrypted != null) && !isMucStatusMessage) {
Conversation conversation = mXmppConnectionService.findOrCreateConversation(account, counterpart.toBareJid(), isTypeGroupChat);
if (isTypeGroupChat) {
if (counterpart.getResourcepart().equals(conversation.getMucOptions().getActualNick())) {
status = Message.STATUS_SEND_RECEIVED;
if (mXmppConnectionService.markMessage(conversation, remoteMsgId, status)) {
return;
} else if (remoteMsgId == null || Config.IGNORE_ID_REWRITE_IN_MUC) {
Message message = conversation.findSentMessageWithBody(packet.getBody());
if (message != null) {
mXmppConnectionService.markMessage(message, status);
return;
}
}
} else {
status = Message.STATUS_RECEIVED;
}
}
Message message;
if (body != null && body.startsWith("?OTR")) {
if (!isForwarded && !isTypeGroupChat && isProperlyAddressed) {
message = parseOtrChat(body, from, remoteMsgId, conversation);
if (message == null) {
return;
}
} else {
message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
}
} else if (pgpEncrypted != null) {
message = parsePGPChat(conversation, pgpEncrypted, status);
} else if (axolotlEncrypted != null) {
message = parseAxolotlChat(axolotlEncrypted, from, remoteMsgId, conversation, status);
if (message == null) {
return;
}
} else {
message = new Message(conversation, body, Message.ENCRYPTION_NONE, status);
}
message.setCounterpart(counterpart);
message.setRemoteMsgId(remoteMsgId);
message.setServerMsgId(serverMsgId);
message.setCarbon(isCarbon);
message.setTime(timestamp);
message.markable = packet.hasChild("markable", "urn:xmpp:chat-markers:0");
if (conversation.getMode() == Conversation.MODE_MULTI) {
Jid trueCounterpart = conversation.getMucOptions().getTrueCounterpart(counterpart.getResourcepart());
message.setTrueCounterpart(trueCounterpart);
if (trueCounterpart != null) {
updateLastseen(packet,account,trueCounterpart,false);
}
if (!isTypeGroupChat) {
message.setType(Message.TYPE_PRIVATE);
}
}
updateLastseen(packet,account,true);
boolean checkForDuplicates = serverMsgId != null
|| (isTypeGroupChat && packet.hasChild("delay","urn:xmpp:delay"))
|| message.getType() == Message.TYPE_PRIVATE;
if (checkForDuplicates && conversation.hasDuplicateMessage(message)) {
Log.d(Config.LOGTAG,"skipping duplicate message from "+message.getCounterpart().toString()+" "+message.getBody());
return;
}
if (query != null) {
query.incrementMessageCount();
}
conversation.add(message);
if (serverMsgId == null) {
if (status == Message.STATUS_SEND || status == Message.STATUS_SEND_RECEIVED) {
mXmppConnectionService.markRead(conversation);
account.activateGracePeriod();
} else {
message.markUnread();
}
mXmppConnectionService.updateConversationUi();
}
if (mXmppConnectionService.confirmMessages() && remoteMsgId != null && !isForwarded && !isTypeGroupChat) {
if (packet.hasChild("markable", "urn:xmpp:chat-markers:0")) {
MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
packet,
"urn:xmpp:chat-markers:0",
MessagePacket.TYPE_CHAT);
mXmppConnectionService.sendMessagePacket(account, receipt);
}
if (packet.hasChild("request", "urn:xmpp:receipts")) {
MessagePacket receipt = mXmppConnectionService.getMessageGenerator().received(account,
packet,
"urn:xmpp:receipts",
packet.getType());
mXmppConnectionService.sendMessagePacket(account, receipt);
}
}
if (account.getXmppConnection() != null && account.getXmppConnection().getFeatures().advancedStreamFeaturesLoaded()) {
if (conversation.setLastMessageTransmitted(System.currentTimeMillis())) {
mXmppConnectionService.updateConversation(conversation);
}
}
if (message.getStatus() == Message.STATUS_RECEIVED
&& conversation.getOtrSession() != null
&& !conversation.getOtrSession().getSessionID().getUserID()
.equals(message.getCounterpart().getResourcepart())) {
conversation.endOtrIfNeeded();
}
if (message.getEncryption() == Message.ENCRYPTION_NONE || mXmppConnectionService.saveEncryptedMessages()) {
mXmppConnectionService.databaseBackend.createMessage(message);
}
final HttpConnectionManager manager = this.mXmppConnectionService.getHttpConnectionManager();
if (message.trusted() && message.treatAsDownloadable() != Message.Decision.NEVER && manager.getAutoAcceptFileSize() > 0) {
manager.createNewDownloadConnection(message);
} else if (!message.isRead()) {
mXmppConnectionService.getNotificationService().push(message);
}
} else { //no body
if (isTypeGroupChat) {
Conversation conversation = mXmppConnectionService.find(account, from.toBareJid());
if (packet.hasChild("subject")) {
if (conversation != null && conversation.getMode() == Conversation.MODE_MULTI) {
conversation.setHasMessagesLeftOnServer(conversation.countMessages() > 0);
conversation.getMucOptions().setSubject(packet.findChildContent("subject"));
mXmppConnectionService.updateConversationUi();
return;
}
}
if (conversation != null && isMucStatusMessage) {
for (Element child : mucUserElement.getChildren()) {
if (child.getName().equals("status")
&& MucOptions.STATUS_CODE_ROOM_CONFIG_CHANGED.equals(child.getAttribute("code"))) {
mXmppConnectionService.fetchConferenceConfiguration(conversation);
}
}
}
}
}
Element received = packet.findChild("received", "urn:xmpp:chat-markers:0");
if (received == null) {
received = packet.findChild("received", "urn:xmpp:receipts");
}
if (received != null && !packet.fromAccount(account)) {
mXmppConnectionService.markMessage(account, from.toBareJid(), received.getAttribute("id"), Message.STATUS_SEND_RECEIVED);
}
Element displayed = packet.findChild("displayed", "urn:xmpp:chat-markers:0");
if (displayed != null) {
if (packet.fromAccount(account)) {
Conversation conversation = mXmppConnectionService.find(account,counterpart.toBareJid());
if (conversation != null) {
mXmppConnectionService.markRead(conversation);
}
} else {
updateLastseen(packet, account, true);
final Message displayedMessage = mXmppConnectionService.markMessage(account, from.toBareJid(), displayed.getAttribute("id"), Message.STATUS_SEND_DISPLAYED);
Message message = displayedMessage == null ? null : displayedMessage.prev();
while (message != null
&& message.getStatus() == Message.STATUS_SEND_RECEIVED
&& message.getTimeSent() < displayedMessage.getTimeSent()) {
mXmppConnectionService.markMessage(message, Message.STATUS_SEND_DISPLAYED);
message = message.prev();
}
}
}
Element event = packet.findChild("event", "http://jabber.org/protocol/pubsub#event");
if (event != null) {
parseEvent(event, from, account);
}
String nick = packet.findChildContent("nick", "http://jabber.org/protocol/nick");
if (nick != null) {
Contact contact = account.getRoster().getContact(from);
contact.setPresenceName(nick);
}
}
}