package de.pixart.messenger.xmpp; import android.content.Context; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.SystemClock; import android.security.KeyChain; import android.support.annotation.NonNull; import android.util.Base64; import android.util.Log; import android.util.Pair; import android.util.SparseArray; import org.xmlpull.v1.XmlPullParserException; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.net.ConnectException; import java.net.IDN; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.MalformedURLException; import java.net.Socket; import java.net.URL; import java.net.UnknownHostException; import java.security.KeyManagementException; import java.security.NoSuchAlgorithmException; import java.security.Principal; import java.security.PrivateKey; import java.security.cert.X509Certificate; import java.util.ArrayList; import java.util.Arrays; import java.util.Collections; import java.util.HashMap; import java.util.HashSet; import java.util.Hashtable; import java.util.Iterator; import java.util.List; import java.util.Map.Entry; import java.util.Random; import java.util.Set; import java.util.concurrent.CountDownLatch; import java.util.concurrent.TimeUnit; import java.util.concurrent.atomic.AtomicBoolean; import java.util.concurrent.atomic.AtomicInteger; import java.util.regex.Matcher; import javax.net.ssl.KeyManager; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSocket; import javax.net.ssl.SSLSocketFactory; import javax.net.ssl.X509KeyManager; import javax.net.ssl.X509TrustManager; import de.pixart.messenger.Config; import de.pixart.messenger.R; import de.pixart.messenger.crypto.DomainHostnameVerifier; import de.pixart.messenger.crypto.XmppDomainVerifier; import de.pixart.messenger.crypto.axolotl.AxolotlService; import de.pixart.messenger.crypto.sasl.Anonymous; import de.pixart.messenger.crypto.sasl.DigestMd5; import de.pixart.messenger.crypto.sasl.External; import de.pixart.messenger.crypto.sasl.Plain; import de.pixart.messenger.crypto.sasl.SaslMechanism; import de.pixart.messenger.crypto.sasl.ScramSha1; import de.pixart.messenger.crypto.sasl.ScramSha256; import de.pixart.messenger.entities.Account; import de.pixart.messenger.entities.Message; import de.pixart.messenger.entities.ServiceDiscoveryResult; import de.pixart.messenger.generator.IqGenerator; import de.pixart.messenger.persistance.FileBackend; import de.pixart.messenger.services.MemorizingTrustManager; import de.pixart.messenger.services.MessageArchiveService; import de.pixart.messenger.services.NotificationService; import de.pixart.messenger.services.XmppConnectionService; import de.pixart.messenger.utils.CryptoHelper; import de.pixart.messenger.utils.Namespace; import de.pixart.messenger.utils.Patterns; import de.pixart.messenger.utils.Resolver; import de.pixart.messenger.utils.SSLSocketHelper; import de.pixart.messenger.utils.SocksSocketFactory; import de.pixart.messenger.xml.Element; import de.pixart.messenger.xml.Tag; import de.pixart.messenger.xml.TagWriter; import de.pixart.messenger.xml.XmlReader; import de.pixart.messenger.xmpp.forms.Data; import de.pixart.messenger.xmpp.forms.Field; import de.pixart.messenger.xmpp.jingle.OnJinglePacketReceived; import de.pixart.messenger.xmpp.jingle.stanzas.JinglePacket; import de.pixart.messenger.xmpp.stanzas.AbstractAcknowledgeableStanza; import de.pixart.messenger.xmpp.stanzas.AbstractStanza; import de.pixart.messenger.xmpp.stanzas.IqPacket; import de.pixart.messenger.xmpp.stanzas.MessagePacket; import de.pixart.messenger.xmpp.stanzas.PresencePacket; import de.pixart.messenger.xmpp.stanzas.csi.ActivePacket; import de.pixart.messenger.xmpp.stanzas.csi.InactivePacket; import de.pixart.messenger.xmpp.stanzas.streammgmt.AckPacket; import de.pixart.messenger.xmpp.stanzas.streammgmt.EnablePacket; import de.pixart.messenger.xmpp.stanzas.streammgmt.RequestPacket; import de.pixart.messenger.xmpp.stanzas.streammgmt.ResumePacket; import rocks.xmpp.addr.Jid; public class XmppConnection implements Runnable { private static final int PACKET_IQ = 0; private static final int PACKET_MESSAGE = 1; private static final int PACKET_PRESENCE = 2; public final OnIqPacketReceived registrationResponseListener = new OnIqPacketReceived() { @Override public void onIqPacketReceived(Account account, IqPacket packet) { if (packet.getType() == IqPacket.TYPE.RESULT) { account.setOption(Account.OPTION_REGISTER, false); throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL); } else { final List PASSWORD_TOO_WEAK_MSGS = Arrays.asList( "The password is too weak", "Please use a longer password."); Element error = packet.findChild("error"); Account.State state = Account.State.REGISTRATION_FAILED; mXmppConnectionService.deleteAccount(account); if (error != null) { if (error.hasChild("text")) { errorMessage = error.findChildContent("text"); Log.d(Config.LOGTAG, "Error creating account : " + error.findChildContent("text")); } if (error.hasChild("conflict")) { state = Account.State.REGISTRATION_CONFLICT; } else if (error.hasChild("resource-constraint") && "wait".equals(error.getAttribute("type"))) { state = Account.State.REGISTRATION_PLEASE_WAIT; } else if (error.hasChild("not-acceptable") && PASSWORD_TOO_WEAK_MSGS.contains(error.findChildContent("text"))) { state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK; } } Log.d(Config.LOGTAG, "Delete account because of error " + error); throw new StateChangingError(state); } } }; protected final Account account; private final Features features = new Features(this); private final HashMap disco = new HashMap<>(); private final SparseArray mStanzaQueue = new SparseArray<>(); private final Hashtable> packetCallbacks = new Hashtable<>(); private final Set advancedStreamFeaturesLoadedListeners = new HashSet<>(); private final XmppConnectionService mXmppConnectionService; private Socket socket; private XmlReader tagReader; private TagWriter tagWriter = new TagWriter(); private boolean shouldAuthenticate = true; private boolean inSmacksSession = false; private boolean isBound = false; private Element streamFeatures; private String streamId = null; private int smVersion = 3; private int stanzasReceived = 0; private int stanzasSent = 0; private long lastPacketReceived = 0; private long lastPingSent = 0; private long lastConnect = 0; private long lastSessionStarted = 0; private long lastDiscoStarted = 0; private boolean isMamPreferenceAlways = false; private AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0); private AtomicBoolean mWaitForDisco = new AtomicBoolean(true); private AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false); private AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0); private boolean mInteractive = false; private int attempt = 0; public static String errorMessage = null; private OnPresencePacketReceived presenceListener = null; private OnJinglePacketReceived jingleListener = null; private OnIqPacketReceived unregisteredIqListener = null; private OnMessagePacketReceived messageListener = null; private OnStatusChanged statusListener = null; private OnBindListener bindListener = null; private OnMessageAcknowledged acknowledgedListener = null; private SaslMechanism saslMechanism; private URL redirectionUrl = null; private String verifiedHostname = null; private volatile Thread mThread; private CountDownLatch mStreamCountDownLatch; public XmppConnection(final Account account, final XmppConnectionService service) { this.account = account; this.mXmppConnectionService = service; } private static void fixResource(Context context, Account account) { String resource = account.getResource(); int fixedPartLength = context.getString(R.string.app_name).length() + 1; //include the trailing dot int randomPartLength = 4; // 3 bytes if (resource != null && resource.length() > fixedPartLength + randomPartLength) { if (validBase64(resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) { account.setResource(resource.substring(0, fixedPartLength + randomPartLength)); } } } private static boolean validBase64(String input) { try { return Base64.decode(input, Base64.URL_SAFE).length == 3; } catch (Throwable throwable) { return false; } } private void changeStatus(final Account.State nextStatus) { synchronized (this) { if (Thread.currentThread().isInterrupted()) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not changing status to " + nextStatus + " because thread was interrupted"); return; } if (account.getStatus() != nextStatus) { if ((nextStatus == Account.State.OFFLINE) && (account.getStatus() != Account.State.CONNECTING) && (account.getStatus() != Account.State.ONLINE) && (account.getStatus() != Account.State.DISABLED)) { return; } if (nextStatus == Account.State.ONLINE) { this.attempt = 0; } account.setStatus(nextStatus); } else { return; } } if (statusListener != null) { statusListener.onStatusChanged(account); } } public void prepareNewConnection() { this.lastConnect = SystemClock.elapsedRealtime(); this.lastPingSent = SystemClock.elapsedRealtime(); this.lastDiscoStarted = Long.MAX_VALUE; this.mWaitingForSmCatchup.set(false); this.changeStatus(Account.State.CONNECTING); } public boolean isWaitingForSmCatchup() { return mWaitingForSmCatchup.get(); } public void incrementSmCatchupMessageCounter() { this.mSmCatchupMessageCounter.incrementAndGet(); } protected void connect() { if (mXmppConnectionService.areMessagesInitialized()) { mXmppConnectionService.resetSendingToWaiting(account); } Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting"); features.encryptionEnabled = false; inSmacksSession = false; isBound = false; this.attempt++; this.verifiedHostname = null; //will be set if user entered hostname is being used or hostname was verified with dnssec try { Socket localSocket; shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER); this.changeStatus(Account.State.CONNECTING); final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion(); final boolean extended = mXmppConnectionService.showExtendedConnectionOptions(); if (Config.XMPP_IP != null && Config.XMPP_Ports != null) { Integer[] XMPP_Port = Config.XMPP_Ports; Integer Port = XMPP_Port[new Random().nextInt(XMPP_Port.length)]; localSocket = new Socket(); try { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": connect to " + Config.XMPP_IP + ":" + Port); localSocket.connect(new InetSocketAddress(Config.XMPP_IP, Port), Config.SOCKET_TIMEOUT * 1000); } catch (IOException e) { throw new UnknownHostException(); } try { startXmpp(localSocket); } catch (InterruptedException e) { Log.d(Config.LOGTAG,account.getJid().asBareJid()+": thread was interrupted before beginning stream"); return; } catch (Exception e) { throw new IOException(e.getMessage()); } } else if (useTor) { String destination; if (account.getHostname().isEmpty()) { destination = account.getServer(); } else { destination = account.getHostname(); this.verifiedHostname = destination; } Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": connect to " + destination + " via Tor"); localSocket = SocksSocketFactory.createSocketOverTor(destination, account.getPort()); try { startXmpp(localSocket); } catch (InterruptedException e) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream"); return; } catch (Exception e) { throw new IOException(e.getMessage()); } } else { final String domain = account.getJid().getDomain(); final List results; final boolean hardcoded = extended && !account.getHostname().isEmpty(); if (hardcoded) { results = Resolver.fromHardCoded(account.getHostname(), account.getPort()); } else { results = Resolver.resolve(domain); } if (Thread.currentThread().isInterrupted()) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted"); return; } if (results.size() == 0) { Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": Resolver results were empty"); return; } final Resolver.Result storedBackupResult; if (hardcoded) { storedBackupResult = null; } else { storedBackupResult = mXmppConnectionService.databaseBackend.findResolverResult(domain); if (storedBackupResult != null && !results.contains(storedBackupResult)) { results.add(storedBackupResult); Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": loaded backup resolver result from db: " + storedBackupResult); } } for (Iterator iterator = results.iterator(); iterator.hasNext(); ) { final Resolver.Result result = iterator.next(); if (Thread.currentThread().isInterrupted()) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted"); return; } try { // if tls is true, encryption is implied and must not be started features.encryptionEnabled = result.isDirectTls(); verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null; Log.d(Config.LOGTAG, "verified hostname " + verifiedHostname); final InetSocketAddress addr; if (result.getIp() != null) { addr = new InetSocketAddress(result.getIp(), result.getPort()); Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": using values from resolver " + (result.getHostname() == null ? "" : result.getHostname().toString() + "/") + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled); } else { addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort()); Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": using values from resolver " + result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled); } if (!features.encryptionEnabled) { localSocket = new Socket(); localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000); } else { final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier(); localSocket = tlsFactoryVerifier.factory.createSocket(); if (localSocket == null) { throw new IOException("could not initialize ssl socket"); } SSLSocketHelper.setSecurity((SSLSocket) localSocket); SSLSocketHelper.setHostname((SSLSocket) localSocket, account.getServer()); SSLSocketHelper.setApplicationProtocol((SSLSocket) localSocket, "xmpp-client"); localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000); if (!tlsFactoryVerifier.verifier.verify(account.getServer(), verifiedHostname, ((SSLSocket) localSocket).getSession())) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed"); if (!iterator.hasNext()) { throw new StateChangingException(Account.State.TLS_ERROR); } } } localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000); if (startXmpp(localSocket)) { localSocket.setSoTimeout(0); //reset to 0; once the connection is established we don’t want this if (!hardcoded && !result.equals(storedBackupResult)) { mXmppConnectionService.databaseBackend.saveResolverResult(domain, result); } break; // successfully connected to server that speaks xmpp } else { localSocket.close(); if (!iterator.hasNext()) { throw new StateChangingException(Account.State.STREAM_OPENING_ERROR); } } } catch (final StateChangingException e) { throw e; } catch (InterruptedException e) { Log.d(Config.LOGTAG,account.getJid().asBareJid()+": thread was interrupted before beginning stream"); return; } catch (final Throwable e) { Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")"); if (!iterator.hasNext()) { throw new UnknownHostException(); } } } } processStream(); } catch (final SecurityException e) { this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION); } catch (final StateChangingException e) { this.changeStatus(e.state); } catch (final UnknownHostException | ConnectException e) { this.changeStatus(Account.State.SERVER_NOT_FOUND); } catch (final SocksSocketFactory.SocksProxyNotFoundException e) { this.changeStatus(Account.State.TOR_NOT_AVAILABLE); } catch (final IOException | XmlPullParserException e) { Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage()); this.changeStatus(Account.State.OFFLINE); this.attempt = Math.max(0, this.attempt - 1); } finally { if (!Thread.currentThread().isInterrupted()) { forceCloseSocket(); } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not force closing socket because thread was interrupted"); } } } /** * Starts xmpp protocol, call after connecting to socket * * @return true if server returns with valid xmpp, false otherwise */ private boolean startXmpp(Socket socket) throws Exception { if (Thread.currentThread().isInterrupted()) { throw new InterruptedException(); } this.socket = socket; tagReader = new XmlReader(); if (tagWriter != null) { tagWriter.forceClose(); } tagWriter = new TagWriter(); tagWriter.setOutputStream(socket.getOutputStream()); tagReader.setInputStream(socket.getInputStream()); tagWriter.beginDocument(); sendStartStream(); final Tag tag = tagReader.readTag(); if (Thread.currentThread().isInterrupted()) { throw new InterruptedException(); } if (socket instanceof SSLSocket) { SSLSocketHelper.log(account, (SSLSocket) socket); } return tag != null && tag.isStart("stream"); } private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException { final SSLContext sc = SSLSocketHelper.getSSLContext(); MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager(); KeyManager[] keyManager; if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) { keyManager = new KeyManager[]{new MyKeyManager()}; } else { keyManager = null; } String domain = account.getJid().getDomain(); sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG()); final SSLSocketFactory factory = sc.getSocketFactory(); final DomainHostnameVerifier verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier(), mInteractive); return new TlsFactoryVerifier(factory, verifier); } @Override public void run() { synchronized (this) { this.mThread = Thread.currentThread(); if (this.mThread.isInterrupted()) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": aborting connect because thread was interrupted"); return; } forceCloseSocket(); } connect(); } private void processStream() throws XmlPullParserException, IOException { final CountDownLatch streamCountDownLatch = new CountDownLatch(1); this.mStreamCountDownLatch = streamCountDownLatch; Tag nextTag = tagReader.readTag(); while (nextTag != null && !nextTag.isEnd("stream")) { if (nextTag.isStart("error")) { processStreamError(nextTag); } else if (nextTag.isStart("features")) { processStreamFeatures(nextTag); } else if (nextTag.isStart("proceed")) { switchOverToTls(); } else if (nextTag.isStart("success")) { final String challenge = tagReader.readElement(nextTag).getContent(); try { saslMechanism.getResponse(challenge); } catch (final SaslMechanism.AuthenticationException e) { Log.e(Config.LOGTAG, String.valueOf(e)); throw new StateChangingException(Account.State.UNAUTHORIZED); } Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": logged in"); account.setKey(Account.PINNED_MECHANISM_KEY, String.valueOf(saslMechanism.getPriority())); tagReader.reset(); sendStartStream(); final Tag tag = tagReader.readTag(); if (tag != null && tag.isStart("stream")) { processStream(); } else { throw new StateChangingException(Account.State.STREAM_OPENING_ERROR); } break; } else if (nextTag.isStart("failure")) { final Element failure = tagReader.readElement(nextTag); if (Namespace.SASL.equals(failure.getNamespace())) { final String text = failure.findChildContent("text"); if (failure.hasChild("account-disabled") && text != null) { Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text); if (matcher.find()) { try { URL url = new URL(text.substring(matcher.start(), matcher.end())); if (url.getProtocol().equals("https")) { this.redirectionUrl = url; throw new StateChangingException(Account.State.PAYMENT_REQUIRED); } } catch (MalformedURLException e) { throw new StateChangingException(Account.State.UNAUTHORIZED); } } } throw new StateChangingException(Account.State.UNAUTHORIZED); } else if (Namespace.TLS.equals(failure.getNamespace())) { throw new StateChangingException(Account.State.TLS_ERROR); } else { throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER); } } else if (nextTag.isStart("challenge")) { final String challenge = tagReader.readElement(nextTag).getContent(); final Element response = new Element("response", Namespace.SASL); try { response.setContent(saslMechanism.getResponse(challenge)); } catch (final SaslMechanism.AuthenticationException e) { // TODO: Send auth abort tag. Log.e(Config.LOGTAG, e.toString()); } tagWriter.writeElement(response); } else if (nextTag.isStart("enabled")) { final Element enabled = tagReader.readElement(nextTag); if ("true".equals(enabled.getAttribute("resume"))) { this.streamId = enabled.getAttribute("id"); Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": stream management(" + smVersion + ") enabled (resumable)"); } else { Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": stream management(" + smVersion + ") enabled"); } this.stanzasReceived = 0; this.inSmacksSession = true; final RequestPacket r = new RequestPacket(smVersion); tagWriter.writeStanzaAsync(r); } else if (nextTag.isStart("resumed")) { this.inSmacksSession = true; this.isBound = true; this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion)); lastPacketReceived = SystemClock.elapsedRealtime(); final Element resumed = tagReader.readElement(nextTag); final String h = resumed.getAttribute("h"); try { ArrayList failedStanzas = new ArrayList<>(); final boolean acknowledgedMessages; synchronized (this.mStanzaQueue) { final int serverCount = Integer.parseInt(h); if (serverCount < stanzasSent) { Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed with lost packages"); stanzasSent = serverCount; } else { Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed"); } acknowledgedMessages = acknowledgeStanzaUpTo(serverCount); for (int i = 0; i < this.mStanzaQueue.size(); ++i) { failedStanzas.add(mStanzaQueue.valueAt(i)); } mStanzaQueue.clear(); } if (acknowledgedMessages) { mXmppConnectionService.updateConversationUi(); } Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas"); for (AbstractAcknowledgeableStanza packet : failedStanzas) { if (packet instanceof MessagePacket) { MessagePacket message = (MessagePacket) packet; mXmppConnectionService.markMessage(account, message.getTo().asBareJid(), message.getId(), Message.STATUS_UNSEND); } sendPacket(packet); } } catch (final NumberFormatException ignored) { } Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource()); changeStatus(Account.State.ONLINE); } else if (nextTag.isStart("r")) { tagReader.readElement(nextTag); if (Config.EXTENDED_SM_LOGGING) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": acknowledging stanza #" + this.stanzasReceived); } final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion); tagWriter.writeStanzaAsync(ack); } else if (nextTag.isStart("a")) { boolean accountUiNeedsRefresh = false; synchronized (NotificationService.CATCHUP_LOCK) { if (mWaitingForSmCatchup.compareAndSet(true, false)) { int count = mSmCatchupMessageCounter.get(); Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": SM catchup complete (" + count + ")"); accountUiNeedsRefresh = true; if (count > 0) { mXmppConnectionService.getNotificationService().finishBacklog(true, account); } } } if (accountUiNeedsRefresh) { mXmppConnectionService.updateAccountUi(); } final Element ack = tagReader.readElement(nextTag); lastPacketReceived = SystemClock.elapsedRealtime(); try { final boolean acknowledgedMessages; synchronized (this.mStanzaQueue) { final int serverSequence = Integer.parseInt(ack.getAttribute("h")); acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence); } if (acknowledgedMessages) { mXmppConnectionService.updateConversationUi(); } } catch (NumberFormatException | NullPointerException e) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server send ack without sequence number"); } } else if (nextTag.isStart("failed")) { Element failed = tagReader.readElement(nextTag); try { final int serverCount = Integer.parseInt(failed.getAttribute("h")); Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed but server acknowledged stanza #" + serverCount); final boolean acknowledgedMessages; synchronized (this.mStanzaQueue) { acknowledgedMessages = acknowledgeStanzaUpTo(serverCount); } if (acknowledgedMessages) { mXmppConnectionService.updateConversationUi(); } } catch (NumberFormatException | NullPointerException e) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed"); } resetStreamId(); sendBindRequest(); } else if (nextTag.isStart("iq")) { processIq(nextTag); } else if (nextTag.isStart("message")) { processMessage(nextTag); } else if (nextTag.isStart("presence")) { processPresence(nextTag); } nextTag = tagReader.readTag(); } if (nextTag != null && nextTag.isEnd("stream")) { streamCountDownLatch.countDown(); } } private boolean acknowledgeStanzaUpTo(int serverCount) { if (serverCount > stanzasSent) { Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent); } boolean acknowledgedMessages = false; for (int i = 0; i < mStanzaQueue.size(); ++i) { if (serverCount >= mStanzaQueue.keyAt(i)) { if (Config.EXTENDED_SM_LOGGING) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i)); } AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i); if (stanza instanceof MessagePacket && acknowledgedListener != null) { MessagePacket packet = (MessagePacket) stanza; acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, packet.getId()); } mStanzaQueue.removeAt(i); i--; } } return acknowledgedMessages; } private @NonNull Element processPacket(final Tag currentTag, final int packetType) throws XmlPullParserException, IOException { Element element; switch (packetType) { case PACKET_IQ: element = new IqPacket(); break; case PACKET_MESSAGE: element = new MessagePacket(); break; case PACKET_PRESENCE: element = new PresencePacket(); break; default: throw new AssertionError("Should never encounter invalid type"); } element.setAttributes(currentTag.getAttributes()); Tag nextTag = tagReader.readTag(); if (nextTag == null) { throw new IOException("interrupted mid tag"); } while (!nextTag.isEnd(element.getName())) { if (!nextTag.isNo()) { final Element child = tagReader.readElement(nextTag); final String type = currentTag.getAttribute("type"); if (packetType == PACKET_IQ && "jingle".equals(child.getName()) && ("set".equalsIgnoreCase(type) || "get" .equalsIgnoreCase(type))) { element = new JinglePacket(); element.setAttributes(currentTag.getAttributes()); } element.addChild(child); } nextTag = tagReader.readTag(); if (nextTag == null) { throw new IOException("interrupted mid tag"); } } if (stanzasReceived == Integer.MAX_VALUE) { resetStreamId(); throw new IOException("time to restart the session. cant handle >2 billion pcks"); } if (inSmacksSession) { ++stanzasReceived; } else if (features.sm()) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session."); } lastPacketReceived = SystemClock.elapsedRealtime(); if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) { Log.d(Config.LOGTAG, "[background stanza] " + element); } return element; } private void processIq(final Tag currentTag) throws XmlPullParserException, IOException { final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ); if (!packet.valid()) { Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'"); return; } if (packet instanceof JinglePacket) { if (this.jingleListener != null) { this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet); } } else { OnIqPacketReceived callback = null; synchronized (this.packetCallbacks) { if (packetCallbacks.containsKey(packet.getId())) { final Pair packetCallbackDuple = packetCallbacks.get(packet.getId()); // Packets to the server should have responses from the server if (packetCallbackDuple.first.toServer(account)) { if (packet.fromServer(account)) { callback = packetCallbackDuple.second; packetCallbacks.remove(packet.getId()); } else { Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet"); } } else { if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) { callback = packetCallbackDuple.second; packetCallbacks.remove(packet.getId()); } else { Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet"); } } } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) { callback = this.unregisteredIqListener; } } if (callback != null) { try { callback.onIqPacketReceived(account, packet); } catch (StateChangingError error) { throw new StateChangingException(error.state); } } } } private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException { final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE); if (!packet.valid()) { Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'"); return; } this.messageListener.onMessagePacketReceived(account, packet); } private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException { PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE); if (!packet.valid()) { Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'"); return; } this.presenceListener.onPresencePacketReceived(account, packet); } private void sendStartTLS() throws IOException { final Tag startTLS = Tag.empty("starttls"); startTLS.setAttribute("xmlns", Namespace.TLS); tagWriter.writeTag(startTLS); } private void switchOverToTls() throws XmlPullParserException, IOException { tagReader.readTag(); try { final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier(); final InetAddress address = socket == null ? null : socket.getInetAddress(); if (address == null) { throw new IOException("could not setup ssl"); } final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true); if (sslSocket == null) { throw new IOException("could not initialize ssl socket"); } SSLSocketHelper.setSecurity(sslSocket); SSLSocketHelper.setHostname(sslSocket, account.getServer()); SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client"); if (!tlsFactoryVerifier.verifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed"); throw new StateChangingException(Account.State.TLS_ERROR); } tagReader.setInputStream(sslSocket.getInputStream()); tagWriter.setOutputStream(sslSocket.getOutputStream()); sendStartStream(); Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established"); features.encryptionEnabled = true; final Tag tag = tagReader.readTag(); if (tag != null && tag.isStart("stream")) { SSLSocketHelper.log(account, sslSocket); processStream(); } else { throw new StateChangingException(Account.State.STREAM_OPENING_ERROR); } sslSocket.close(); } catch (final NoSuchAlgorithmException | KeyManagementException e1) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed"); throw new StateChangingException(Account.State.TLS_ERROR); } } private void processStreamFeatures(final Tag currentTag) throws XmlPullParserException, IOException { this.streamFeatures = tagReader.readElement(currentTag); final boolean isSecure = features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS; final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER); if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) { sendStartTLS(); } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) { if (isSecure) { sendRegistryRequest(); } else { throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER); } } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) { throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED); } else if (this.streamFeatures.hasChild("mechanisms") && shouldAuthenticate && isSecure) { authenticate(); } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) { if (Config.EXTENDED_SM_LOGGING) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resuming after stanza #" + stanzasReceived); } final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion); this.mSmCatchupMessageCounter.set(0); this.mWaitingForSmCatchup.set(true); this.tagWriter.writeStanzaAsync(resume); } else if (needsBinding) { if (this.streamFeatures.hasChild("bind") && isSecure) { sendBindRequest(); } else { throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER); } } } private void authenticate() throws IOException { final List mechanisms = extractMechanisms(streamFeatures .findChild("mechanisms")); final Element auth = new Element("auth", Namespace.SASL); if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) { saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG()); } else if (mechanisms.contains("SCRAM-SHA-256")) { saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG()); } else if (mechanisms.contains("SCRAM-SHA-1")) { saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG()); } else if (mechanisms.contains("PLAIN") && !account.getJid().getDomain().equals("nimbuzz.com")) { saslMechanism = new Plain(tagWriter, account); } else if (mechanisms.contains("DIGEST-MD5")) { saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG()); } else if (mechanisms.contains("ANONYMOUS")) { saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG()); } if (saslMechanism != null) { final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1); if (pinnedMechanism > saslMechanism.getPriority()) { Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() + " has lower priority (" + String.valueOf(saslMechanism.getPriority()) + ") than pinned priority (" + pinnedMechanism + "). Possible downgrade attack?"); throw new StateChangingException(Account.State.DOWNGRADE_ATTACK); } Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism()); auth.setAttribute("mechanism", saslMechanism.getMechanism()); if (!saslMechanism.getClientFirstMessage().isEmpty()) { auth.setContent(saslMechanism.getClientFirstMessage()); } tagWriter.writeElement(auth); } else { throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER); } } private List extractMechanisms(final Element stream) { final ArrayList mechanisms = new ArrayList<>(stream .getChildren().size()); for (final Element child : stream.getChildren()) { mechanisms.add(child.getContent()); } return mechanisms; } private void sendRegistryRequest() { final IqPacket register = new IqPacket(IqPacket.TYPE.GET); register.query("jabber:iq:register"); register.setTo(Jid.of(account.getServer())); sendUnmodifiedIqPacket(register, (account, packet) -> { if (packet.getType() == IqPacket.TYPE.TIMEOUT) { return; } if (packet.getType() == IqPacket.TYPE.ERROR) { throw new StateChangingError(Account.State.REGISTRATION_FAILED); } final Element query = packet.query("jabber:iq:register"); if (query.hasChild("username") && (query.hasChild("password"))) { final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET); final Element username = new Element("username").setContent(account.getUsername()); final Element password = new Element("password").setContent(account.getPassword()); register1.query("jabber:iq:register").addChild(username); register1.query().addChild(password); register1.setFrom(account.getJid().asBareJid()); sendUnmodifiedIqPacket(register1, registrationResponseListener, true); } else if (query.hasChild("x", Namespace.DATA)) { final Data data = Data.parse(query.findChild("x", Namespace.DATA)); final Element blob = query.findChild("data", "urn:xmpp:bob"); final String id = packet.getId(); InputStream is; if (blob != null) { try { final String base64Blob = blob.getContent(); final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT); is = new ByteArrayInputStream(strBlob); } catch (Exception e) { is = null; } } else { try { Field field = data.getFieldByName("url"); URL url = field != null && field.getValue() != null ? new URL(field.getValue()) : null; is = url != null ? url.openStream() : null; } catch (IOException e) { is = null; } } if (is != null) { Bitmap captcha = BitmapFactory.decodeStream(is); try { if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) { return; } } catch (Exception e) { throw new StateChangingError(Account.State.REGISTRATION_FAILED); } } throw new StateChangingError(Account.State.REGISTRATION_FAILED); } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) { final String instructions = query.findChildContent("instructions"); final Element oob = query.findChild("x", Namespace.OOB); final String url = oob == null ? null : oob.findChildContent("url"); if (url != null) { setAccountCreationFailed(url); } else if (instructions != null) { Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions); if (matcher.find()) { setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end())); } } throw new StateChangingError(Account.State.REGISTRATION_FAILED); } }, true); } private void setAccountCreationFailed(String url) { if (url != null) { try { this.redirectionUrl = new URL(url); if (this.redirectionUrl.getProtocol().equals("https")) { throw new StateChangingError(Account.State.REGISTRATION_WEB); } } catch (MalformedURLException e) { //fall through } } throw new StateChangingError(Account.State.REGISTRATION_FAILED); } public URL getRedirectionUrl() { return this.redirectionUrl; } public void resetEverything() { resetAttemptCount(true); resetStreamId(); clearIqCallbacks(); this.stanzasSent = 0; mStanzaQueue.clear(); this.redirectionUrl = null; synchronized (this.disco) { disco.clear(); } } private void sendBindRequest() { try { mXmppConnectionService.restoredFromDatabaseLatch.await(); } catch (InterruptedException e) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind"); return; } clearIqCallbacks(); if (account.getJid().isBareJid()) { account.setResource(this.createNewResource()); } else { fixResource(mXmppConnectionService, account); } final IqPacket iq = new IqPacket(IqPacket.TYPE.SET); final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource(); iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource); this.sendUnmodifiedIqPacket(iq, (account, packet) -> { if (packet.getType() == IqPacket.TYPE.TIMEOUT) { return; } final Element bind = packet.findChild("bind"); if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) { isBound = true; final Element jid = bind.findChild("jid"); if (jid != null && jid.getContent() != null) { try { Jid assignedJid = Jid.ofEscaped(jid.getContent()); if (!account.getJid().getDomain().equals(assignedJid.getDomain())) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain()); throw new StateChangingError(Account.State.BIND_FAILURE); } if (account.setJid(assignedJid)) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database"); mXmppConnectionService.databaseBackend.updateAccount(account); } if (streamFeatures.hasChild("session") && !streamFeatures.findChild("session").hasChild("optional")) { sendStartSession(); } else { sendPostBindInitialization(); } return; } catch (final IllegalArgumentException e) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind"); } } else { Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)"); } } else { Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString()); } final Element error = packet.findChild("error"); if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) { account.setResource(createNewResource()); } throw new StateChangingError(Account.State.BIND_FAILURE); }, true); } private void clearIqCallbacks() { final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT); final ArrayList callbacks = new ArrayList<>(); synchronized (this.packetCallbacks) { if (this.packetCallbacks.size() == 0) { return; } Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks"); final Iterator> iterator = this.packetCallbacks.values().iterator(); while (iterator.hasNext()) { Pair entry = iterator.next(); callbacks.add(entry.second); iterator.remove(); } } for (OnIqPacketReceived callback : callbacks) { try { callback.onIqPacketReceived(account, failurePacket); } catch (StateChangingError error) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks"); //ignore } } Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left"); } public void sendDiscoTimeout() { if (mWaitForDisco.compareAndSet(true, false)) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout"); finalizeBind(); } } private void sendStartSession() { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server"); final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET); startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session"); this.sendUnmodifiedIqPacket(startSession, (account, packet) -> { if (packet.getType() == IqPacket.TYPE.RESULT) { sendPostBindInitialization(); } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) { throw new StateChangingError(Account.State.SESSION_FAILURE); } }, true); } private void sendPostBindInitialization() { smVersion = 0; if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) { smVersion = 3; } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) { smVersion = 2; } if (smVersion != 0) { synchronized (this.mStanzaQueue) { final EnablePacket enable = new EnablePacket(smVersion); tagWriter.writeStanzaAsync(enable); stanzasSent = 0; mStanzaQueue.clear(); } } features.carbonsEnabled = false; features.blockListRequested = false; synchronized (this.disco) { this.disco.clear(); } Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery"); mPendingServiceDiscoveries.set(0); if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain())) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery"); mWaitForDisco.set(false); } else { mWaitForDisco.set(true); } lastDiscoStarted = SystemClock.elapsedRealtime(); mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode()); Element caps = streamFeatures.findChild("c"); final String hash = caps == null ? null : caps.getAttribute("hash"); final String ver = caps == null ? null : caps.getAttribute("ver"); ServiceDiscoveryResult discoveryResult = null; if (hash != null && ver != null) { discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver)); } final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY); if (requestDiscoItemsFirst) { sendServiceDiscoveryItems(Jid.of(account.getServer())); } if (discoveryResult == null) { sendServiceDiscoveryInfo(Jid.of(account.getServer())); } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache"); disco.put(Jid.of(account.getServer()), discoveryResult); } discoverMamPreferences(); sendServiceDiscoveryInfo(account.getJid().asBareJid()); if (!requestDiscoItemsFirst) { sendServiceDiscoveryItems(Jid.of(account.getServer())); } if (!mWaitForDisco.get()) { finalizeBind(); } this.lastSessionStarted = SystemClock.elapsedRealtime(); } private void sendServiceDiscoveryInfo(final Jid jid) { mPendingServiceDiscoveries.incrementAndGet(); final IqPacket iq = new IqPacket(IqPacket.TYPE.GET); iq.setTo(jid); iq.query("http://jabber.org/protocol/disco#info"); this.sendIqPacket(iq, (account, packet) -> { if (packet.getType() == IqPacket.TYPE.RESULT) { boolean advancedStreamFeaturesLoaded; synchronized (XmppConnection.this.disco) { ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet); if (jid.equals(Jid.of(account.getServer()))) { mXmppConnectionService.databaseBackend.insertDiscoveryResult(result); } disco.put(jid, result); advancedStreamFeaturesLoaded = disco.containsKey(Jid.of(account.getServer())) && disco.containsKey(account.getJid().asBareJid()); } if (advancedStreamFeaturesLoaded && (jid.equals(Jid.of(account.getServer())) || jid.equals(account.getJid().asBareJid()))) { enableAdvancedStreamFeatures(); } } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString()); } if (packet.getType() != IqPacket.TYPE.TIMEOUT) { if (mPendingServiceDiscoveries.decrementAndGet() == 0 && mWaitForDisco.compareAndSet(true, false)) { finalizeBind(); } } }); } private void discoverMamPreferences() { IqPacket request = new IqPacket(IqPacket.TYPE.GET); request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace); sendIqPacket(request, (account, response) -> { if (response.getType() == IqPacket.TYPE.RESULT) { Element prefs = response.findChild("prefs", MessageArchiveService.Version.MAM_2.namespace); isMamPreferenceAlways = "always".equals(prefs == null ? null : prefs.getAttribute("default")); } }); } public boolean isMamPreferenceAlways() { return isMamPreferenceAlways; } private void finalizeBind() { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource()); if (bindListener != null) { bindListener.onBind(account); } changeStatus(Account.State.ONLINE); } private void enableAdvancedStreamFeatures() { if (getFeatures().carbons() && !features.carbonsEnabled) { sendEnableCarbons(); } if (getFeatures().blocking() && !features.blockListRequested) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list"); this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser()); } for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) { listener.onAdvancedStreamFeaturesAvailable(account); } } private void sendServiceDiscoveryItems(final Jid server) { mPendingServiceDiscoveries.incrementAndGet(); final IqPacket iq = new IqPacket(IqPacket.TYPE.GET); iq.setTo(Jid.ofDomain(server.getDomain())); iq.query("http://jabber.org/protocol/disco#items"); this.sendIqPacket(iq, (account, packet) -> { if (packet.getType() == IqPacket.TYPE.RESULT) { HashSet items = new HashSet(); final List elements = packet.query().getChildren(); for (final Element element : elements) { if (element.getName().equals("item")) { final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid")); if (jid != null && !jid.equals(Jid.of(account.getServer()))) { items.add(jid); } } } for (Jid jid : items) { sendServiceDiscoveryInfo(jid); } } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server); } if (packet.getType() != IqPacket.TYPE.TIMEOUT) { if (mPendingServiceDiscoveries.decrementAndGet() == 0 && mWaitForDisco.compareAndSet(true, false)) { finalizeBind(); } } }); } private void sendEnableCarbons() { final IqPacket iq = new IqPacket(IqPacket.TYPE.SET); iq.addChild("enable", "urn:xmpp:carbons:2"); this.sendIqPacket(iq, new OnIqPacketReceived() { @Override public void onIqPacketReceived(final Account account, final IqPacket packet) { if (!packet.hasChild("error")) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": successfully enabled carbons"); features.carbonsEnabled = true; } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": error enableing carbons " + packet.toString()); } } }); } private void processStreamError(final Tag currentTag) throws XmlPullParserException, IOException { final Element streamError = tagReader.readElement(currentTag); if (streamError == null) { return; } if (streamError.hasChild("conflict")) { account.setResource(createNewResource()); Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")"); throw new IOException(); } else if (streamError.hasChild("host-unknown")) { throw new StateChangingException(Account.State.HOST_UNKNOWN); } else if (streamError.hasChild("policy-violation")) { throw new StateChangingException(Account.State.POLICY_VIOLATION); } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError.toString()); throw new StateChangingException(Account.State.STREAM_ERROR); } } private void sendStartStream() throws IOException { final Tag stream = Tag.start("stream:stream"); stream.setAttribute("to", account.getServer()); stream.setAttribute("version", "1.0"); stream.setAttribute("xml:lang", "en"); stream.setAttribute("xmlns", "jabber:client"); stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams"); tagWriter.writeTag(stream); } private String createNewResource() { return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true); } private String nextRandomId() { return nextRandomId(false); } private String nextRandomId(boolean s) { return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG()); } public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) { packet.setFrom(account.getJid()); return this.sendUnmodifiedIqPacket(packet, callback, false); } public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) { if (packet.getId() == null) { packet.setAttribute("id", nextRandomId()); } if (callback != null) { synchronized (this.packetCallbacks) { packetCallbacks.put(packet.getId(), new Pair<>(packet, callback)); } } this.sendPacket(packet, force); return packet.getId(); } public void sendMessagePacket(final MessagePacket packet) { this.sendPacket(packet); } public void sendPresencePacket(final PresencePacket packet) { this.sendPacket(packet); } private synchronized void sendPacket(final AbstractStanza packet) { sendPacket(packet, false); } private synchronized void sendPacket(final AbstractStanza packet, final boolean force) { if (stanzasSent == Integer.MAX_VALUE) { resetStreamId(); disconnect(true); return; } synchronized (this.mStanzaQueue) { if (force || isBound) { tagWriter.writeStanzaAsync(packet); } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString()); } if (packet instanceof AbstractAcknowledgeableStanza) { AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet; if (this.mStanzaQueue.size() != 0) { int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1); if (currentHighestKey != stanzasSent) { throw new AssertionError("Stanza count messed up"); } } ++stanzasSent; this.mStanzaQueue.append(stanzasSent, stanza); if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) { if (Config.EXTENDED_SM_LOGGING) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent); } tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion)); } } } } public void sendPing() { if (!r()) { final IqPacket iq = new IqPacket(IqPacket.TYPE.GET); iq.setFrom(account.getJid()); iq.addChild("ping", "urn:xmpp:ping"); this.sendIqPacket(iq, null); } this.lastPingSent = SystemClock.elapsedRealtime(); } public void setOnMessagePacketReceivedListener( final OnMessagePacketReceived listener) { this.messageListener = listener; } public void setOnUnregisteredIqPacketReceivedListener( final OnIqPacketReceived listener) { this.unregisteredIqListener = listener; } public void setOnPresencePacketReceivedListener( final OnPresencePacketReceived listener) { this.presenceListener = listener; } public void setOnJinglePacketReceivedListener( final OnJinglePacketReceived listener) { this.jingleListener = listener; } public void setOnStatusChangedListener(final OnStatusChanged listener) { this.statusListener = listener; } public void setOnBindListener(final OnBindListener listener) { this.bindListener = listener; } public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) { this.acknowledgedListener = listener; } public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) { this.advancedStreamFeaturesLoadedListeners.add(listener); } private void forceCloseSocket() { if (socket != null) { try { socket.close(); } catch (IOException e) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception " + e.getMessage() + " during force close"); } } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": socket was null during force close"); } } public void interrupt() { if (this.mThread != null) { this.mThread.interrupt(); } } public void disconnect(final boolean force) { interrupt(); Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + Boolean.toString(force)); if (force) { forceCloseSocket(); } else { final TagWriter currentTagWriter = this.tagWriter; if (currentTagWriter.isActive()) { currentTagWriter.finish(); final Socket currentSocket = this.socket; final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch; try { currentTagWriter.await(1, TimeUnit.SECONDS); Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream"); currentTagWriter.writeTag(Tag.end("stream:stream")); if (streamCountDownLatch != null) { if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream"); } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing"); } } } catch (InterruptedException e) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream"); } catch (final IOException e) { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")"); } finally { FileBackend.close(currentSocket); } } else { forceCloseSocket(); } } } public void resetStreamId() { this.streamId = null; } public List> findDiscoItemsByFeature(final String feature) { synchronized (this.disco) { final List> items = new ArrayList<>(); for (final Entry cursor : this.disco.entrySet()) { if (cursor.getValue().getFeatures().contains(feature)) { items.add(cursor); } } return items; } } public Jid findDiscoItemByFeature(final String feature) { final List> items = findDiscoItemsByFeature(feature); if (items.size() >= 1) { return items.get(0).getKey(); } return null; } public boolean r() { if (getFeatures().sm()) { this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion)); return true; } else { return false; } } public List getMucServersWithholdAccount() { List servers = getMucServers(); servers.remove(account.getServer()); return servers; } public List getMucServers() { List servers = new ArrayList<>(); synchronized (this.disco) { for (final Entry cursor : disco.entrySet()) { final ServiceDiscoveryResult value = cursor.getValue(); if (value.getFeatures().contains("http://jabber.org/protocol/muc") && value.hasIdentity("conference", "text") && !value.getFeatures().contains("jabber:iq:gateway") && !value.hasIdentity("conference", "irc")) { servers.add(cursor.getKey().toString()); } } } return servers; } public String getMucServer() { List servers = getMucServers(); return servers.size() > 0 ? servers.get(0) : null; } public int getTimeToNextAttempt() { final int interval = Math.min((int) (25 * Math.pow(1.3, attempt)), 300); final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000); return interval - secondsSinceLast; } public int getAttempt() { return this.attempt; } public Features getFeatures() { return this.features; } public long getLastSessionEstablished() { final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted; return System.currentTimeMillis() - diff; } public long getLastConnect() { return this.lastConnect; } public long getLastPingSent() { return this.lastPingSent; } public long getLastDiscoStarted() { return this.lastDiscoStarted; } public long getLastPacketReceived() { return this.lastPacketReceived; } public void sendActive() { this.sendPacket(new ActivePacket()); } public void sendInactive() { this.sendPacket(new InactivePacket()); } public void resetAttemptCount(boolean resetConnectTime) { this.attempt = 0; if (resetConnectTime) { this.lastConnect = 0; } } public void setInteractive(boolean interactive) { this.mInteractive = interactive; } public Identity getServerIdentity() { synchronized (this.disco) { ServiceDiscoveryResult result = disco.get(Jid.ofDomain(account.getJid().getDomain())); if (result == null) { return Identity.UNKNOWN; } for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) { if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) { switch (id.getName()) { case "Prosody": return Identity.PROSODY; case "ejabberd": return Identity.EJABBERD; case "Slack-XMPP": return Identity.SLACK; } } } } return Identity.UNKNOWN; } private IqGenerator getIqGenerator() { return mXmppConnectionService.getIqGenerator(); } public enum Identity { FACEBOOK, SLACK, EJABBERD, PROSODY, NIMBUZZ, UNKNOWN } private static class TlsFactoryVerifier { private final SSLSocketFactory factory; private final DomainHostnameVerifier verifier; TlsFactoryVerifier(final SSLSocketFactory factory, final DomainHostnameVerifier verifier) throws IOException { this.factory = factory; this.verifier = verifier; if (factory == null || verifier == null) { throw new IOException("could not setup ssl"); } } } private class MyKeyManager implements X509KeyManager { @Override public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) { return account.getPrivateKeyAlias(); } @Override public String chooseServerAlias(String s, Principal[] principals, Socket socket) { return null; } @Override public X509Certificate[] getCertificateChain(String alias) { Log.d(Config.LOGTAG, "getting certificate chain"); try { return KeyChain.getCertificateChain(mXmppConnectionService, alias); } catch (Exception e) { Log.d(Config.LOGTAG, e.getMessage()); return new X509Certificate[0]; } } @Override public String[] getClientAliases(String s, Principal[] principals) { final String alias = account.getPrivateKeyAlias(); return alias != null ? new String[]{alias} : new String[0]; } @Override public String[] getServerAliases(String s, Principal[] principals) { return new String[0]; } @Override public PrivateKey getPrivateKey(String alias) { try { return KeyChain.getPrivateKey(mXmppConnectionService, alias); } catch (Exception e) { return null; } } } private class StateChangingError extends Error { private final Account.State state; public StateChangingError(Account.State state) { this.state = state; } } private class StateChangingException extends IOException { private final Account.State state; public StateChangingException(Account.State state) { this.state = state; } } public class Features { XmppConnection connection; private boolean carbonsEnabled = false; private boolean encryptionEnabled = false; private boolean blockListRequested = false; public Features(final XmppConnection connection) { this.connection = connection; } private boolean hasDiscoFeature(final Jid server, final String feature) { synchronized (XmppConnection.this.disco) { return connection.disco.containsKey(server) && connection.disco.get(server).getFeatures().contains(feature); } } public boolean carbons() { return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:carbons:2"); } public boolean bookmarksConversion() { return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions(); } public boolean blocking() { return hasDiscoFeature(Jid.of(account.getServer()), Namespace.BLOCKING); } public boolean spamReporting() { return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:reporting:reason:spam:0"); } public boolean flexibleOfflineMessageRetrieval() { return hasDiscoFeature(Jid.of(account.getServer()), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL); } public boolean register() { return hasDiscoFeature(Jid.of(account.getServer()), Namespace.REGISTER); } public boolean sm() { return streamId != null || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm")); } public boolean csi() { return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0"); } public boolean pep() { synchronized (XmppConnection.this.disco) { ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid()); return info != null && info.hasIdentity("pubsub", "pep"); } } public boolean pepPersistent() { synchronized (XmppConnection.this.disco) { ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid()); return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items"); } } public boolean pepPublishOptions() { return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS); } public boolean pepOmemoWhitelisted() { return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED); } public boolean mam() { return MessageArchiveService.Version.has(getAccountFeatures()); } public List getAccountFeatures() { ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid()); return result == null ? Collections.emptyList() : result.getFeatures(); } public boolean push() { return hasDiscoFeature(account.getJid().asBareJid(), "urn:xmpp:push:0") || hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:push:0"); } public boolean rosterVersioning() { return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver"); } public void setBlockListRequested(boolean value) { this.blockListRequested = value; } public boolean p1S3FileTransfer() { return hasDiscoFeature(Jid.of(account.getServer()), Namespace.P1_S3_FILE_TRANSFER); } public boolean httpUpload(long filesize) { if (Config.DISABLE_HTTP_UPLOAD) { return false; } else { for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) { List> items = findDiscoItemsByFeature(namespace); if (items.size() > 0) { try { long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size")); if (filesize <= maxsize) { return true; } else { Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")"); return false; } } catch (Exception e) { return true; } } } return false; } } public boolean useLegacyHttpUpload() { return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null; } public long getMaxHttpUploadSize() { for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) { List> items = findDiscoItemsByFeature(namespace); if (items.size() > 0) { try { return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size")); } catch (Exception e) { //ignored } } } return -1; } public boolean stanzaIds() { return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS); } } }