1package eu.siacs.conversations.xmpp;
2
3import static eu.siacs.conversations.utils.Random.SECURE_RANDOM;
4
5import android.content.Context;
6import android.graphics.Bitmap;
7import android.graphics.BitmapFactory;
8import android.os.Build;
9import android.os.SystemClock;
10import android.security.KeyChain;
11import android.util.Base64;
12import android.util.Log;
13import android.util.Pair;
14import android.util.SparseArray;
15
16import androidx.annotation.NonNull;
17import androidx.annotation.Nullable;
18
19import com.google.common.base.MoreObjects;
20import com.google.common.base.Optional;
21import com.google.common.base.Preconditions;
22import com.google.common.base.Strings;
23import com.google.common.collect.ImmutableList;
24
25import eu.siacs.conversations.Config;
26import eu.siacs.conversations.R;
27import eu.siacs.conversations.crypto.XmppDomainVerifier;
28import eu.siacs.conversations.crypto.axolotl.AxolotlService;
29import eu.siacs.conversations.crypto.sasl.ChannelBinding;
30import eu.siacs.conversations.crypto.sasl.ChannelBindingMechanism;
31import eu.siacs.conversations.crypto.sasl.HashedToken;
32import eu.siacs.conversations.crypto.sasl.SaslMechanism;
33import eu.siacs.conversations.entities.Account;
34import eu.siacs.conversations.entities.Message;
35import eu.siacs.conversations.entities.ServiceDiscoveryResult;
36import eu.siacs.conversations.generator.IqGenerator;
37import eu.siacs.conversations.http.HttpConnectionManager;
38import eu.siacs.conversations.persistance.FileBackend;
39import eu.siacs.conversations.services.MemorizingTrustManager;
40import eu.siacs.conversations.services.MessageArchiveService;
41import eu.siacs.conversations.services.NotificationService;
42import eu.siacs.conversations.services.XmppConnectionService;
43import eu.siacs.conversations.utils.AccountUtils;
44import eu.siacs.conversations.utils.CryptoHelper;
45import eu.siacs.conversations.utils.Patterns;
46import eu.siacs.conversations.utils.PhoneHelper;
47import eu.siacs.conversations.utils.Resolver;
48import eu.siacs.conversations.utils.SSLSockets;
49import eu.siacs.conversations.utils.SocksSocketFactory;
50import eu.siacs.conversations.utils.XmlHelper;
51import eu.siacs.conversations.xml.Element;
52import eu.siacs.conversations.xml.LocalizedContent;
53import eu.siacs.conversations.xml.Namespace;
54import eu.siacs.conversations.xml.Tag;
55import eu.siacs.conversations.xml.TagWriter;
56import eu.siacs.conversations.xml.XmlReader;
57import eu.siacs.conversations.xmpp.bind.Bind2;
58import eu.siacs.conversations.xmpp.forms.Data;
59import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
60import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
61import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
62import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
63import eu.siacs.conversations.xmpp.stanzas.IqPacket;
64import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
65import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
66import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
67import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
68import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
69import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
70import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
71import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
72
73import okhttp3.HttpUrl;
74
75import org.xmlpull.v1.XmlPullParserException;
76
77import java.io.ByteArrayInputStream;
78import java.io.IOException;
79import java.io.InputStream;
80import java.net.ConnectException;
81import java.net.IDN;
82import java.net.InetAddress;
83import java.net.InetSocketAddress;
84import java.net.Socket;
85import java.net.UnknownHostException;
86import java.security.KeyManagementException;
87import java.security.NoSuchAlgorithmException;
88import java.security.Principal;
89import java.security.PrivateKey;
90import java.security.cert.X509Certificate;
91import java.util.ArrayList;
92import java.util.Arrays;
93import java.util.Collection;
94import java.util.Collections;
95import java.util.HashMap;
96import java.util.HashSet;
97import java.util.Hashtable;
98import java.util.Iterator;
99import java.util.List;
100import java.util.Map.Entry;
101import java.util.Set;
102import java.util.concurrent.CountDownLatch;
103import java.util.concurrent.TimeUnit;
104import java.util.concurrent.atomic.AtomicBoolean;
105import java.util.concurrent.atomic.AtomicInteger;
106import java.util.regex.Matcher;
107
108import javax.net.ssl.KeyManager;
109import javax.net.ssl.SSLContext;
110import javax.net.ssl.SSLPeerUnverifiedException;
111import javax.net.ssl.SSLSocket;
112import javax.net.ssl.SSLSocketFactory;
113import javax.net.ssl.X509KeyManager;
114import javax.net.ssl.X509TrustManager;
115
116public class XmppConnection implements Runnable {
117
118 private static final int PACKET_IQ = 0;
119 private static final int PACKET_MESSAGE = 1;
120 private static final int PACKET_PRESENCE = 2;
121 public final OnIqPacketReceived registrationResponseListener =
122 (account, packet) -> {
123 if (packet.getType() == IqPacket.TYPE.RESULT) {
124 account.setOption(Account.OPTION_REGISTER, false);
125 Log.d(
126 Config.LOGTAG,
127 account.getJid().asBareJid()
128 + ": successfully registered new account on server");
129 throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL);
130 } else {
131 final List<String> PASSWORD_TOO_WEAK_MSGS =
132 Arrays.asList(
133 "The password is too weak", "Please use a longer password.");
134 Element error = packet.findChild("error");
135 Account.State state = Account.State.REGISTRATION_FAILED;
136 if (error != null) {
137 if (error.hasChild("conflict")) {
138 state = Account.State.REGISTRATION_CONFLICT;
139 } else if (error.hasChild("resource-constraint")
140 && "wait".equals(error.getAttribute("type"))) {
141 state = Account.State.REGISTRATION_PLEASE_WAIT;
142 } else if (error.hasChild("not-acceptable")
143 && PASSWORD_TOO_WEAK_MSGS.contains(
144 error.findChildContent("text"))) {
145 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
146 }
147 }
148 throw new StateChangingError(state);
149 }
150 };
151 protected final Account account;
152 private final Features features = new Features(this);
153 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
154 private final HashMap<String, Jid> commands = new HashMap<>();
155 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
156 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks =
157 new Hashtable<>();
158 private final Set<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners =
159 new HashSet<>();
160 private final XmppConnectionService mXmppConnectionService;
161 private Socket socket;
162 private XmlReader tagReader;
163 private TagWriter tagWriter = new TagWriter();
164 private boolean shouldAuthenticate = true;
165 private boolean inSmacksSession = false;
166 private boolean quickStartInProgress = false;
167 private boolean isBound = false;
168 private Element streamFeatures;
169 private Element boundStreamFeatures;
170 private StreamId streamId = null;
171 private int stanzasReceived = 0;
172 private int stanzasSent = 0;
173 private int stanzasSentBeforeAuthentication;
174 private long lastPacketReceived = 0;
175 private long lastPingSent = 0;
176 private long lastConnect = 0;
177 private long lastSessionStarted = 0;
178 private long lastDiscoStarted = 0;
179 private boolean isMamPreferenceAlways = false;
180 private final AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
181 private final AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
182 private final AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
183 private final AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
184 private boolean mInteractive = false;
185 private int attempt = 0;
186 private OnPresencePacketReceived presenceListener = null;
187 private OnJinglePacketReceived jingleListener = null;
188 private OnIqPacketReceived unregisteredIqListener = null;
189 private OnMessagePacketReceived messageListener = null;
190 private OnStatusChanged statusListener = null;
191 private OnBindListener bindListener = null;
192 private OnMessageAcknowledged acknowledgedListener = null;
193 private LoginInfo loginInfo;
194 private HashedToken.Mechanism hashTokenRequest;
195 private HttpUrl redirectionUrl = null;
196 private String verifiedHostname = null;
197 private Resolver.Result currentResolverResult;
198 private Resolver.Result seeOtherHostResolverResult;
199 private volatile Thread mThread;
200 private CountDownLatch mStreamCountDownLatch;
201
202 public XmppConnection(final Account account, final XmppConnectionService service) {
203 this.account = account;
204 this.mXmppConnectionService = service;
205 }
206
207 private static void fixResource(Context context, Account account) {
208 String resource = account.getResource();
209 int fixedPartLength =
210 context.getString(R.string.app_name).length() + 1; // include the trailing dot
211 int randomPartLength = 4; // 3 bytes
212 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
213 if (validBase64(
214 resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
215 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
216 }
217 }
218 }
219
220 private static boolean validBase64(String input) {
221 try {
222 return Base64.decode(input, Base64.URL_SAFE).length == 3;
223 } catch (Throwable throwable) {
224 return false;
225 }
226 }
227
228 private void changeStatus(final Account.State nextStatus) {
229 synchronized (this) {
230 if (Thread.currentThread().isInterrupted()) {
231 Log.d(
232 Config.LOGTAG,
233 account.getJid().asBareJid()
234 + ": not changing status to "
235 + nextStatus
236 + " because thread was interrupted");
237 return;
238 }
239 if (account.getStatus() != nextStatus) {
240 if (nextStatus == Account.State.OFFLINE
241 && account.getStatus() != Account.State.CONNECTING
242 && account.getStatus() != Account.State.ONLINE
243 && account.getStatus() != Account.State.DISABLED
244 && account.getStatus() != Account.State.LOGGED_OUT) {
245 return;
246 }
247 if (nextStatus == Account.State.ONLINE) {
248 this.attempt = 0;
249 }
250 account.setStatus(nextStatus);
251 } else {
252 return;
253 }
254 }
255 if (statusListener != null) {
256 statusListener.onStatusChanged(account);
257 }
258 }
259
260 public Jid getJidForCommand(final String node) {
261 synchronized (this.commands) {
262 return this.commands.get(node);
263 }
264 }
265
266 public void prepareNewConnection() {
267 this.lastConnect = SystemClock.elapsedRealtime();
268 this.lastPingSent = SystemClock.elapsedRealtime();
269 this.lastDiscoStarted = Long.MAX_VALUE;
270 this.mWaitingForSmCatchup.set(false);
271 this.changeStatus(Account.State.CONNECTING);
272 }
273
274 public boolean isWaitingForSmCatchup() {
275 return mWaitingForSmCatchup.get();
276 }
277
278 public void incrementSmCatchupMessageCounter() {
279 this.mSmCatchupMessageCounter.incrementAndGet();
280 }
281
282 protected void connect() {
283 if (mXmppConnectionService.areMessagesInitialized()) {
284 mXmppConnectionService.resetSendingToWaiting(account);
285 }
286 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
287 this.loginInfo = null;
288 this.features.encryptionEnabled = false;
289 this.inSmacksSession = false;
290 this.quickStartInProgress = false;
291 this.isBound = false;
292 this.attempt++;
293 this.verifiedHostname =
294 null; // will be set if user entered hostname is being used or hostname was verified
295 // with dnssec
296 try {
297 Socket localSocket;
298 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
299 this.changeStatus(Account.State.CONNECTING);
300 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
301 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
302 if (useTor) {
303 String destination;
304 if (account.getHostname().isEmpty() || account.isOnion()) {
305 destination = account.getServer();
306 } else {
307 destination = account.getHostname();
308 this.verifiedHostname = destination;
309 }
310
311 final int port = account.getPort();
312 final boolean directTls = Resolver.useDirectTls(port);
313
314 Log.d(
315 Config.LOGTAG,
316 account.getJid().asBareJid()
317 + ": connect to "
318 + destination
319 + " via Tor. directTls="
320 + directTls);
321 localSocket = SocksSocketFactory.createSocketOverTor(destination, port);
322
323 if (directTls) {
324 localSocket = upgradeSocketToTls(localSocket);
325 features.encryptionEnabled = true;
326 }
327
328 try {
329 startXmpp(localSocket);
330 } catch (final InterruptedException e) {
331 Log.d(
332 Config.LOGTAG,
333 account.getJid().asBareJid()
334 + ": thread was interrupted before beginning stream");
335 return;
336 } catch (final Exception e) {
337 throw new IOException("Could not start stream", e);
338 }
339 } else {
340 final String domain = account.getServer();
341 final List<Resolver.Result> results;
342 final boolean hardcoded = extended && !account.getHostname().isEmpty();
343 if (hardcoded) {
344 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
345 } else {
346 results = Resolver.resolve(domain);
347 }
348 if (Thread.currentThread().isInterrupted()) {
349 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
350 return;
351 }
352 if (results.size() == 0) {
353 Log.e(
354 Config.LOGTAG,
355 account.getJid().asBareJid() + ": Resolver results were empty");
356 return;
357 }
358 final Resolver.Result storedBackupResult;
359 if (hardcoded) {
360 storedBackupResult = null;
361 } else {
362 storedBackupResult =
363 mXmppConnectionService.databaseBackend.findResolverResult(domain);
364 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
365 results.add(storedBackupResult);
366 Log.d(
367 Config.LOGTAG,
368 account.getJid().asBareJid()
369 + ": loaded backup resolver result from db: "
370 + storedBackupResult);
371 }
372 }
373 final StreamId streamId = this.streamId;
374 final Resolver.Result resumeLocation = streamId == null ? null : streamId.location;
375 if (resumeLocation != null) {
376 Log.d(
377 Config.LOGTAG,
378 account.getJid().asBareJid()
379 + ": injected resume location on position 0");
380 results.add(0, resumeLocation);
381 }
382 final Resolver.Result seeOtherHost = this.seeOtherHostResolverResult;
383 if (seeOtherHost != null) {
384 Log.d(
385 Config.LOGTAG,
386 account.getJid().asBareJid()
387 + ": injected see-other-host on position 0");
388 results.add(0, seeOtherHost);
389 }
390 for (final Iterator<Resolver.Result> iterator = results.iterator();
391 iterator.hasNext(); ) {
392 final Resolver.Result result = iterator.next();
393 if (Thread.currentThread().isInterrupted()) {
394 Log.d(
395 Config.LOGTAG,
396 account.getJid().asBareJid() + ": Thread was interrupted");
397 return;
398 }
399 try {
400 // if tls is true, encryption is implied and must not be started
401 features.encryptionEnabled = result.isDirectTls();
402 verifiedHostname =
403 result.isAuthenticated() ? result.getHostname().toString() : null;
404 final InetSocketAddress addr;
405 if (result.getIp() != null) {
406 addr = new InetSocketAddress(result.getIp(), result.getPort());
407 Log.d(
408 Config.LOGTAG,
409 account.getJid().asBareJid().toString()
410 + ": using values from resolver "
411 + (result.getHostname() == null
412 ? ""
413 : result.getHostname().toString() + "/")
414 + result.getIp().getHostAddress()
415 + ":"
416 + result.getPort()
417 + " tls: "
418 + features.encryptionEnabled);
419 } else {
420 addr =
421 new InetSocketAddress(
422 IDN.toASCII(result.getHostname().toString()),
423 result.getPort());
424 Log.d(
425 Config.LOGTAG,
426 account.getJid().asBareJid().toString()
427 + ": using values from resolver "
428 + result.getHostname().toString()
429 + ":"
430 + result.getPort()
431 + " tls: "
432 + features.encryptionEnabled);
433 }
434
435 localSocket = new Socket();
436 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
437
438 if (features.encryptionEnabled) {
439 localSocket = upgradeSocketToTls(localSocket);
440 }
441
442 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
443 if (startXmpp(localSocket)) {
444 localSocket.setSoTimeout(
445 0); // reset to 0; once the connection is established we don’t
446 // want this
447 if (!hardcoded && !result.equals(storedBackupResult)) {
448 mXmppConnectionService.databaseBackend.saveResolverResult(
449 domain, result);
450 }
451 this.currentResolverResult = result;
452 this.seeOtherHostResolverResult = null;
453 break; // successfully connected to server that speaks xmpp
454 } else {
455 FileBackend.close(localSocket);
456 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
457 }
458 } catch (final StateChangingException e) {
459 if (!iterator.hasNext()) {
460 throw e;
461 }
462 } catch (InterruptedException e) {
463 Log.d(
464 Config.LOGTAG,
465 account.getJid().asBareJid()
466 + ": thread was interrupted before beginning stream");
467 return;
468 } catch (final Throwable e) {
469 Log.d(
470 Config.LOGTAG,
471 account.getJid().asBareJid().toString()
472 + ": "
473 + e.getMessage()
474 + "("
475 + e.getClass().getName()
476 + ")");
477 if (!iterator.hasNext()) {
478 throw new UnknownHostException();
479 }
480 }
481 }
482 }
483 processStream();
484 } catch (final SecurityException e) {
485 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
486 } catch (final StateChangingException e) {
487 this.changeStatus(e.state);
488 } catch (final UnknownHostException
489 | ConnectException
490 | SocksSocketFactory.HostNotFoundException e) {
491 this.changeStatus(Account.State.SERVER_NOT_FOUND);
492 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
493 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
494 } catch (final IOException | XmlPullParserException e) {
495 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
496 this.changeStatus(Account.State.OFFLINE);
497 this.attempt = Math.max(0, this.attempt - 1);
498 } finally {
499 if (!Thread.currentThread().isInterrupted()) {
500 forceCloseSocket();
501 } else {
502 Log.d(
503 Config.LOGTAG,
504 account.getJid().asBareJid()
505 + ": not force closing socket because thread was interrupted");
506 }
507 }
508 }
509
510 /**
511 * Starts xmpp protocol, call after connecting to socket
512 *
513 * @return true if server returns with valid xmpp, false otherwise
514 */
515 private boolean startXmpp(final Socket socket) throws Exception {
516 if (Thread.currentThread().isInterrupted()) {
517 throw new InterruptedException();
518 }
519 this.socket = socket;
520 tagReader = new XmlReader();
521 if (tagWriter != null) {
522 tagWriter.forceClose();
523 }
524 tagWriter = new TagWriter();
525 tagWriter.setOutputStream(socket.getOutputStream());
526 tagReader.setInputStream(socket.getInputStream());
527 tagWriter.beginDocument();
528 final boolean quickStart;
529 if (socket instanceof SSLSocket) {
530 final SSLSocket sslSocket = (SSLSocket) socket;
531 SSLSockets.log(account, sslSocket);
532 quickStart = establishStream(SSLSockets.version(sslSocket));
533 } else {
534 quickStart = establishStream(SSLSockets.Version.NONE);
535 }
536 final Tag tag = tagReader.readTag();
537 if (Thread.currentThread().isInterrupted()) {
538 throw new InterruptedException();
539 }
540 final boolean success = tag != null && tag.isStart("stream", Namespace.STREAMS);
541 if (success && quickStart) {
542 this.quickStartInProgress = true;
543 }
544 return success;
545 }
546
547 private SSLSocketFactory getSSLSocketFactory()
548 throws NoSuchAlgorithmException, KeyManagementException {
549 final SSLContext sc = SSLSockets.getSSLContext();
550 final MemorizingTrustManager trustManager =
551 this.mXmppConnectionService.getMemorizingTrustManager();
552 final KeyManager[] keyManager;
553 if (account.getPrivateKeyAlias() != null) {
554 keyManager = new KeyManager[] {new MyKeyManager()};
555 } else {
556 keyManager = null;
557 }
558 final String domain = account.getServer();
559 sc.init(
560 keyManager,
561 new X509TrustManager[] {
562 mInteractive
563 ? trustManager.getInteractive(domain)
564 : trustManager.getNonInteractive(domain)
565 },
566 SECURE_RANDOM);
567 return sc.getSocketFactory();
568 }
569
570 @Override
571 public void run() {
572 synchronized (this) {
573 this.mThread = Thread.currentThread();
574 if (this.mThread.isInterrupted()) {
575 Log.d(
576 Config.LOGTAG,
577 account.getJid().asBareJid()
578 + ": aborting connect because thread was interrupted");
579 return;
580 }
581 forceCloseSocket();
582 }
583 connect();
584 }
585
586 private void processStream() throws XmlPullParserException, IOException {
587 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
588 this.mStreamCountDownLatch = streamCountDownLatch;
589 Tag nextTag = tagReader.readTag();
590 while (nextTag != null && !nextTag.isEnd("stream")) {
591 if (nextTag.isStart("error")) {
592 processStreamError(nextTag);
593 } else if (nextTag.isStart("features", Namespace.STREAMS)) {
594 processStreamFeatures(nextTag);
595 } else if (nextTag.isStart("proceed", Namespace.TLS)) {
596 switchOverToTls();
597 } else if (nextTag.isStart("failure", Namespace.TLS)) {
598 throw new StateChangingException(Account.State.TLS_ERROR);
599 } else if (account.isOptionSet(Account.OPTION_REGISTER)
600 && nextTag.isStart("iq", Namespace.JABBER_CLIENT)) {
601 processIq(nextTag);
602 } else if (!isSecure() || this.loginInfo == null) {
603 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
604 } else if (nextTag.isStart("success")) {
605 final Element success = tagReader.readElement(nextTag);
606 if (processSuccess(success)) {
607 break;
608 }
609 } else if (nextTag.isStart("failure")) {
610 final Element failure = tagReader.readElement(nextTag);
611 processFailure(failure);
612 } else if (nextTag.isStart("continue", Namespace.SASL_2)) {
613 // two step sasl2 - we don’t support this yet
614 throw new StateChangingException(Account.State.INCOMPATIBLE_CLIENT);
615 } else if (nextTag.isStart("challenge")) {
616 final Element challenge = tagReader.readElement(nextTag);
617 processChallenge(challenge);
618 } else if (this.streamId != null
619 && nextTag.isStart("resumed", Namespace.STREAM_MANAGEMENT)) {
620 final Element resumed = tagReader.readElement(nextTag);
621 processResumed(resumed);
622 } else if (nextTag.isStart("failed", Namespace.STREAM_MANAGEMENT)) {
623 final Element failed = tagReader.readElement(nextTag);
624 processFailed(failed, true);
625 } else if (nextTag.isStart("iq", Namespace.JABBER_CLIENT)) {
626 processIq(nextTag);
627 } else if (!isBound) {
628 Log.d(
629 Config.LOGTAG,
630 account.getJid().asBareJid()
631 + ": server sent unexpected"
632 + nextTag.identifier());
633 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
634 } else if (nextTag.isStart("message", Namespace.JABBER_CLIENT)) {
635 processMessage(nextTag);
636 } else if (nextTag.isStart("presence", Namespace.JABBER_CLIENT)) {
637 processPresence(nextTag);
638 } else if (nextTag.isStart("enabled", Namespace.STREAM_MANAGEMENT)) {
639 final Element enabled = tagReader.readElement(nextTag);
640 processEnabled(enabled);
641 } else if (nextTag.isStart("r", Namespace.STREAM_MANAGEMENT)) {
642 tagReader.readElement(nextTag);
643 if (Config.EXTENDED_SM_LOGGING) {
644 Log.d(
645 Config.LOGTAG,
646 account.getJid().asBareJid()
647 + ": acknowledging stanza #"
648 + this.stanzasReceived);
649 }
650 final AckPacket ack = new AckPacket(this.stanzasReceived);
651 tagWriter.writeStanzaAsync(ack);
652 } else if (nextTag.isStart("a", Namespace.STREAM_MANAGEMENT)) {
653 boolean accountUiNeedsRefresh = false;
654 synchronized (NotificationService.CATCHUP_LOCK) {
655 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
656 final int messageCount = mSmCatchupMessageCounter.get();
657 final int pendingIQs = packetCallbacks.size();
658 Log.d(
659 Config.LOGTAG,
660 account.getJid().asBareJid()
661 + ": SM catchup complete (messages="
662 + messageCount
663 + ", pending IQs="
664 + pendingIQs
665 + ")");
666 accountUiNeedsRefresh = true;
667 if (messageCount > 0) {
668 mXmppConnectionService
669 .getNotificationService()
670 .finishBacklog(true, account);
671 }
672 }
673 }
674 if (accountUiNeedsRefresh) {
675 mXmppConnectionService.updateAccountUi();
676 }
677 final Element ack = tagReader.readElement(nextTag);
678 lastPacketReceived = SystemClock.elapsedRealtime();
679 final boolean acknowledgedMessages;
680 synchronized (this.mStanzaQueue) {
681 final Optional<Integer> serverSequence = ack.getOptionalIntAttribute("h");
682 if (serverSequence.isPresent()) {
683 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence.get());
684 } else {
685 acknowledgedMessages = false;
686 Log.d(
687 Config.LOGTAG,
688 account.getJid().asBareJid()
689 + ": server send ack without sequence number");
690 }
691 }
692 if (acknowledgedMessages) {
693 mXmppConnectionService.updateConversationUi();
694 }
695 } else {
696 Log.e(
697 Config.LOGTAG,
698 account.getJid().asBareJid()
699 + ": Encountered unknown stream element"
700 + nextTag.identifier());
701 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
702 }
703 nextTag = tagReader.readTag();
704 }
705 if (nextTag != null && nextTag.isEnd("stream")) {
706 streamCountDownLatch.countDown();
707 }
708 }
709
710 private void processChallenge(final Element challenge) throws IOException {
711 final SaslMechanism.Version version;
712 try {
713 version = SaslMechanism.Version.of(challenge);
714 } catch (final IllegalArgumentException e) {
715 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
716 }
717 final Element response;
718 if (version == SaslMechanism.Version.SASL) {
719 response = new Element("response", Namespace.SASL);
720 } else if (version == SaslMechanism.Version.SASL_2) {
721 response = new Element("response", Namespace.SASL_2);
722 } else {
723 throw new AssertionError("Missing implementation for " + version);
724 }
725 try {
726 response.setContent(
727 this.loginInfo.saslMechanism.getResponse(
728 challenge.getContent(), sslSocketOrNull(socket)));
729 } catch (final SaslMechanism.AuthenticationException e) {
730 // TODO: Send auth abort tag.
731 Log.e(Config.LOGTAG, e.toString());
732 throw new StateChangingException(Account.State.UNAUTHORIZED);
733 }
734 tagWriter.writeElement(response);
735 }
736
737 private boolean processSuccess(final Element success)
738 throws IOException, XmlPullParserException {
739 final SaslMechanism.Version version;
740 try {
741 version = SaslMechanism.Version.of(success);
742 } catch (final IllegalArgumentException e) {
743 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
744 }
745 final LoginInfo currentLoginInfo = this.loginInfo;
746 final SaslMechanism currentSaslMechanism = LoginInfo.mechanism(currentLoginInfo);
747 if (currentLoginInfo == null || currentSaslMechanism == null) {
748 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
749 }
750 final String challenge;
751 if (version == SaslMechanism.Version.SASL) {
752 challenge = success.getContent();
753 } else if (version == SaslMechanism.Version.SASL_2) {
754 challenge = success.findChildContent("additional-data");
755 } else {
756 throw new AssertionError("Missing implementation for " + version);
757 }
758 try {
759 currentSaslMechanism.getResponse(challenge, sslSocketOrNull(socket));
760 } catch (final SaslMechanism.AuthenticationException e) {
761 Log.e(Config.LOGTAG, String.valueOf(e));
762 throw new StateChangingException(Account.State.UNAUTHORIZED);
763 }
764 Log.d(
765 Config.LOGTAG,
766 account.getJid().asBareJid().toString() + ": logged in (using " + version + ")");
767 if (SaslMechanism.pin(currentSaslMechanism)) {
768 account.setPinnedMechanism(currentSaslMechanism);
769 }
770 if (version == SaslMechanism.Version.SASL_2) {
771 final String authorizationIdentifier =
772 success.findChildContent("authorization-identifier");
773 final Jid authorizationJid;
774 try {
775 authorizationJid =
776 Strings.isNullOrEmpty(authorizationIdentifier)
777 ? null
778 : Jid.ofEscaped(authorizationIdentifier);
779 } catch (final IllegalArgumentException e) {
780 Log.d(
781 Config.LOGTAG,
782 account.getJid().asBareJid()
783 + ": SASL 2.0 authorization identifier was not a valid jid");
784 throw new StateChangingException(Account.State.BIND_FAILURE);
785 }
786 if (authorizationJid == null) {
787 throw new StateChangingException(Account.State.BIND_FAILURE);
788 }
789 Log.d(
790 Config.LOGTAG,
791 account.getJid().asBareJid()
792 + ": SASL 2.0 authorization identifier was "
793 + authorizationJid);
794 if (!account.getJid().getDomain().equals(authorizationJid.getDomain())) {
795 Log.d(
796 Config.LOGTAG,
797 account.getJid().asBareJid()
798 + ": server tried to re-assign domain to "
799 + authorizationJid.getDomain());
800 throw new StateChangingError(Account.State.BIND_FAILURE);
801 }
802 if (authorizationJid.isFullJid() && account.setJid(authorizationJid)) {
803 Log.d(
804 Config.LOGTAG,
805 account.getJid().asBareJid()
806 + ": jid changed during SASL 2.0. updating database");
807 }
808 final Element bound = success.findChild("bound", Namespace.BIND2);
809 final Element resumed = success.findChild("resumed", Namespace.STREAM_MANAGEMENT);
810 final Element failed = success.findChild("failed", Namespace.STREAM_MANAGEMENT);
811 final Element tokenWrapper = success.findChild("token", Namespace.FAST);
812 final String token = tokenWrapper == null ? null : tokenWrapper.getAttribute("token");
813 if (bound != null && resumed != null) {
814 Log.d(
815 Config.LOGTAG,
816 account.getJid().asBareJid()
817 + ": server sent bound and resumed in SASL2 success");
818 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
819 }
820 if (resumed != null && streamId != null) {
821 if (this.boundStreamFeatures != null) {
822 this.streamFeatures = this.boundStreamFeatures;
823 Log.d(
824 Config.LOGTAG,
825 "putting previous stream features back in place: "
826 + XmlHelper.printElementNames(this.boundStreamFeatures));
827 }
828 processResumed(resumed);
829 } else if (failed != null) {
830 processFailed(failed, false); // wait for new stream features
831 }
832 if (bound != null) {
833 clearIqCallbacks();
834 this.isBound = true;
835 processNopStreamFeatures();
836 this.boundStreamFeatures = this.streamFeatures;
837 final Element streamManagementEnabled =
838 bound.findChild("enabled", Namespace.STREAM_MANAGEMENT);
839 final Element carbonsEnabled = bound.findChild("enabled", Namespace.CARBONS);
840 final boolean waitForDisco;
841 if (streamManagementEnabled != null) {
842 resetOutboundStanzaQueue();
843 processEnabled(streamManagementEnabled);
844 waitForDisco = true;
845 } else {
846 // if we did not enable stream management in bind do it now
847 waitForDisco = enableStreamManagement();
848 }
849 final boolean negotiatedCarbons;
850 if (carbonsEnabled != null) {
851 negotiatedCarbons = true;
852 Log.d(
853 Config.LOGTAG,
854 account.getJid().asBareJid()
855 + ": successfully enabled carbons (via Bind 2.0)");
856 features.carbonsEnabled = true;
857 } else if (loginInfo.inlineBindFeatures.contains(Namespace.CARBONS)) {
858 negotiatedCarbons = true;
859 Log.d(
860 Config.LOGTAG,
861 account.getJid().asBareJid()
862 + ": successfully enabled carbons (via Bind 2.0/implicit)");
863 features.carbonsEnabled = true;
864 } else {
865 negotiatedCarbons = false;
866 }
867 sendPostBindInitialization(waitForDisco, negotiatedCarbons);
868 }
869 final HashedToken.Mechanism tokenMechanism;
870 if (SaslMechanism.hashedToken(currentSaslMechanism)) {
871 tokenMechanism = ((HashedToken) currentSaslMechanism).getTokenMechanism();
872 } else if (this.hashTokenRequest != null) {
873 tokenMechanism = this.hashTokenRequest;
874 } else {
875 tokenMechanism = null;
876 }
877 if (tokenMechanism != null && !Strings.isNullOrEmpty(token)) {
878 if (ChannelBinding.priority(tokenMechanism.channelBinding)
879 >= ChannelBindingMechanism.getPriority(currentSaslMechanism)) {
880 this.account.setFastToken(tokenMechanism, token);
881 Log.d(
882 Config.LOGTAG,
883 account.getJid().asBareJid()
884 + ": storing hashed token "
885 + tokenMechanism);
886 } else {
887 Log.d(
888 Config.LOGTAG,
889 account.getJid().asBareJid()
890 + ": not accepting hashed token "
891 + tokenMechanism.name()
892 + " for log in mechanism "
893 + currentSaslMechanism.getMechanism());
894 this.account.resetFastToken();
895 }
896 } else if (this.hashTokenRequest != null) {
897 Log.w(
898 Config.LOGTAG,
899 account.getJid().asBareJid()
900 + ": no response to our hashed token request "
901 + this.hashTokenRequest);
902 }
903 }
904 mXmppConnectionService.databaseBackend.updateAccount(account);
905 this.quickStartInProgress = false;
906 if (version == SaslMechanism.Version.SASL) {
907 tagReader.reset();
908 sendStartStream(false, true);
909 final Tag tag = tagReader.readTag();
910 if (tag != null && tag.isStart("stream", Namespace.STREAMS)) {
911 processStream();
912 return true;
913 } else {
914 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
915 }
916 } else {
917 return false;
918 }
919 }
920
921 private void resetOutboundStanzaQueue() {
922 synchronized (this.mStanzaQueue) {
923 final List<AbstractAcknowledgeableStanza> intermediateStanzas = new ArrayList<>();
924 if (Config.EXTENDED_SM_LOGGING) {
925 Log.d(
926 Config.LOGTAG,
927 account.getJid().asBareJid()
928 + ": stanzas sent before auth: "
929 + this.stanzasSentBeforeAuthentication);
930 }
931 for (int i = this.stanzasSentBeforeAuthentication + 1; i <= this.stanzasSent; ++i) {
932 final AbstractAcknowledgeableStanza stanza = this.mStanzaQueue.get(i);
933 if (stanza != null) {
934 intermediateStanzas.add(stanza);
935 }
936 }
937 this.mStanzaQueue.clear();
938 for (int i = 0; i < intermediateStanzas.size(); ++i) {
939 this.mStanzaQueue.put(i, intermediateStanzas.get(i));
940 }
941 this.stanzasSent = intermediateStanzas.size();
942 if (Config.EXTENDED_SM_LOGGING) {
943 Log.d(
944 Config.LOGTAG,
945 account.getJid().asBareJid()
946 + ": resetting outbound stanza queue to "
947 + this.stanzasSent);
948 }
949 }
950 }
951
952 private void processNopStreamFeatures() throws IOException {
953 final Tag tag = tagReader.readTag();
954 if (tag != null && tag.isStart("features", Namespace.STREAMS)) {
955 this.streamFeatures = tagReader.readElement(tag);
956 Log.d(
957 Config.LOGTAG,
958 account.getJid().asBareJid()
959 + ": processed NOP stream features after success: "
960 + XmlHelper.printElementNames(this.streamFeatures));
961 } else {
962 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received " + tag);
963 Log.d(
964 Config.LOGTAG,
965 account.getJid().asBareJid()
966 + ": server did not send stream features after SASL2 success");
967 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
968 }
969 }
970
971 private void processFailure(final Element failure) throws IOException {
972 final SaslMechanism.Version version;
973 try {
974 version = SaslMechanism.Version.of(failure);
975 } catch (final IllegalArgumentException e) {
976 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
977 }
978 Log.d(Config.LOGTAG, failure.toString());
979 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
980 if (SaslMechanism.hashedToken(LoginInfo.mechanism(this.loginInfo))) {
981 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resetting token");
982 account.resetFastToken();
983 mXmppConnectionService.databaseBackend.updateAccount(account);
984 }
985 if (failure.hasChild("temporary-auth-failure")) {
986 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
987 } else if (failure.hasChild("account-disabled")) {
988 final String text = failure.findChildContent("text");
989 if (Strings.isNullOrEmpty(text)) {
990 throw new StateChangingException(Account.State.UNAUTHORIZED);
991 }
992 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
993 if (matcher.find()) {
994 final HttpUrl url;
995 try {
996 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
997 } catch (final IllegalArgumentException e) {
998 throw new StateChangingException(Account.State.UNAUTHORIZED);
999 }
1000 if (url.isHttps()) {
1001 this.redirectionUrl = url;
1002 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
1003 }
1004 }
1005 }
1006 if (SaslMechanism.hashedToken(LoginInfo.mechanism(this.loginInfo))) {
1007 Log.d(
1008 Config.LOGTAG,
1009 account.getJid().asBareJid()
1010 + ": fast authentication failed. falling back to regular authentication");
1011 authenticate();
1012 } else {
1013 throw new StateChangingException(Account.State.UNAUTHORIZED);
1014 }
1015 }
1016
1017 private static SSLSocket sslSocketOrNull(final Socket socket) {
1018 if (socket instanceof SSLSocket) {
1019 return (SSLSocket) socket;
1020 } else {
1021 return null;
1022 }
1023 }
1024
1025 private void processEnabled(final Element enabled) {
1026 final String id;
1027 if (enabled.getAttributeAsBoolean("resume")) {
1028 id = enabled.getAttribute("id");
1029 } else {
1030 id = null;
1031 }
1032 final String locationAttribute = enabled.getAttribute("location");
1033 final Resolver.Result currentResolverResult = this.currentResolverResult;
1034 final Resolver.Result location;
1035 if (Strings.isNullOrEmpty(locationAttribute) || currentResolverResult == null) {
1036 location = null;
1037 } else {
1038 location = currentResolverResult.seeOtherHost(locationAttribute);
1039 }
1040 final StreamId streamId = id == null ? null : new StreamId(id, location);
1041 if (streamId == null) {
1042 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream management enabled");
1043 } else {
1044 Log.d(
1045 Config.LOGTAG,
1046 account.getJid().asBareJid()
1047 + ": stream management enabled. resume at: "
1048 + streamId.location);
1049 }
1050 this.streamId = streamId;
1051 this.stanzasReceived = 0;
1052 this.inSmacksSession = true;
1053 final RequestPacket r = new RequestPacket();
1054 tagWriter.writeStanzaAsync(r);
1055 }
1056
1057 private void processResumed(final Element resumed) throws StateChangingException {
1058 this.inSmacksSession = true;
1059 this.isBound = true;
1060 this.tagWriter.writeStanzaAsync(new RequestPacket());
1061 lastPacketReceived = SystemClock.elapsedRealtime();
1062 final Optional<Integer> h = resumed.getOptionalIntAttribute("h");
1063 final int serverCount;
1064 if (h.isPresent()) {
1065 serverCount = h.get();
1066 } else {
1067 resetStreamId();
1068 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1069 }
1070 final ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
1071 final boolean acknowledgedMessages;
1072 synchronized (this.mStanzaQueue) {
1073 if (serverCount < stanzasSent) {
1074 Log.d(
1075 Config.LOGTAG,
1076 account.getJid().asBareJid() + ": session resumed with lost packages");
1077 stanzasSent = serverCount;
1078 } else {
1079 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": session resumed");
1080 }
1081 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
1082 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
1083 failedStanzas.add(mStanzaQueue.valueAt(i));
1084 }
1085 mStanzaQueue.clear();
1086 }
1087 if (acknowledgedMessages) {
1088 mXmppConnectionService.updateConversationUi();
1089 }
1090 Log.d(
1091 Config.LOGTAG,
1092 account.getJid().asBareJid() + ": resending " + failedStanzas.size() + " stanzas");
1093 for (final AbstractAcknowledgeableStanza packet : failedStanzas) {
1094 if (packet instanceof MessagePacket message) {
1095 mXmppConnectionService.markMessage(
1096 account,
1097 message.getTo().asBareJid(),
1098 message.getId(),
1099 Message.STATUS_UNSEND);
1100 }
1101 sendPacket(packet);
1102 }
1103 changeStatusToOnline();
1104 }
1105
1106 private void changeStatusToOnline() {
1107 Log.d(
1108 Config.LOGTAG,
1109 account.getJid().asBareJid() + ": online with resource " + account.getResource());
1110 changeStatus(Account.State.ONLINE);
1111 }
1112
1113 private void processFailed(final Element failed, final boolean sendBindRequest) {
1114 final Optional<Integer> serverCount = failed.getOptionalIntAttribute("h");
1115 if (serverCount.isPresent()) {
1116 Log.d(
1117 Config.LOGTAG,
1118 account.getJid().asBareJid()
1119 + ": resumption failed but server acknowledged stanza #"
1120 + serverCount.get());
1121 final boolean acknowledgedMessages;
1122 synchronized (this.mStanzaQueue) {
1123 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount.get());
1124 }
1125 if (acknowledgedMessages) {
1126 mXmppConnectionService.updateConversationUi();
1127 }
1128 } else {
1129 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
1130 }
1131 resetStreamId();
1132 if (sendBindRequest) {
1133 sendBindRequest();
1134 }
1135 }
1136
1137 private boolean acknowledgeStanzaUpTo(final int serverCount) {
1138 if (serverCount > stanzasSent) {
1139 Log.e(
1140 Config.LOGTAG,
1141 "server acknowledged more stanzas than we sent. serverCount="
1142 + serverCount
1143 + ", ourCount="
1144 + stanzasSent);
1145 }
1146 boolean acknowledgedMessages = false;
1147 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1148 if (serverCount >= mStanzaQueue.keyAt(i)) {
1149 if (Config.EXTENDED_SM_LOGGING) {
1150 Log.d(
1151 Config.LOGTAG,
1152 account.getJid().asBareJid()
1153 + ": server acknowledged stanza #"
1154 + mStanzaQueue.keyAt(i));
1155 }
1156 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1157 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
1158 final MessagePacket packet = (MessagePacket) stanza;
1159 final String id = packet.getId();
1160 final Jid to = packet.getTo();
1161 if (id != null && to != null) {
1162 acknowledgedMessages |=
1163 acknowledgedListener.onMessageAcknowledged(account, to, id);
1164 }
1165 }
1166 mStanzaQueue.removeAt(i);
1167 i--;
1168 }
1169 }
1170 return acknowledgedMessages;
1171 }
1172
1173 private @NonNull Element processPacket(final Tag currentTag, final int packetType)
1174 throws IOException {
1175 final Element element =
1176 switch (packetType) {
1177 case PACKET_IQ -> new IqPacket();
1178 case PACKET_MESSAGE -> new MessagePacket();
1179 case PACKET_PRESENCE -> new PresencePacket();
1180 default -> throw new AssertionError("Should never encounter invalid type");
1181 };
1182 element.setAttributes(currentTag.getAttributes());
1183 Tag nextTag = tagReader.readTag();
1184 if (nextTag == null) {
1185 throw new IOException("interrupted mid tag");
1186 }
1187 while (!nextTag.isEnd(element.getName())) {
1188 if (!nextTag.isNo()) {
1189 element.addChild(tagReader.readElement(nextTag));
1190 }
1191 nextTag = tagReader.readTag();
1192 if (nextTag == null) {
1193 throw new IOException("interrupted mid tag");
1194 }
1195 }
1196 if (stanzasReceived == Integer.MAX_VALUE) {
1197 resetStreamId();
1198 throw new IOException("time to restart the session. cant handle >2 billion pcks");
1199 }
1200 if (inSmacksSession) {
1201 ++stanzasReceived;
1202 } else if (features.sm()) {
1203 Log.d(
1204 Config.LOGTAG,
1205 account.getJid().asBareJid()
1206 + ": not counting stanza("
1207 + element.getClass().getSimpleName()
1208 + "). Not in smacks session.");
1209 }
1210 lastPacketReceived = SystemClock.elapsedRealtime();
1211 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
1212 Log.d(Config.LOGTAG, "[background stanza] " + element);
1213 }
1214 if (element instanceof IqPacket
1215 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
1216 && element.hasChild("jingle", Namespace.JINGLE)) {
1217 return JinglePacket.upgrade((IqPacket) element);
1218 } else {
1219 return element;
1220 }
1221 }
1222
1223 private void processIq(final Tag currentTag) throws IOException {
1224 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
1225 if (!packet.valid()) {
1226 Log.e(
1227 Config.LOGTAG,
1228 "encountered invalid iq from='"
1229 + packet.getFrom()
1230 + "' to='"
1231 + packet.getTo()
1232 + "'");
1233 return;
1234 }
1235 if (packet instanceof JinglePacket jinglePacket && isBound) {
1236 if (this.jingleListener != null) {
1237 this.jingleListener.onJinglePacketReceived(account, jinglePacket);
1238 }
1239 } else {
1240 final OnIqPacketReceived callback = getIqPacketReceivedCallback(packet);
1241 if (callback == null) {
1242 Log.d(
1243 Config.LOGTAG,
1244 account.getJid().asBareJid().toString()
1245 + ": no callback registered for IQ from "
1246 + packet.getFrom());
1247 return;
1248 }
1249 try {
1250 callback.onIqPacketReceived(account, packet);
1251 } catch (final StateChangingError error) {
1252 throw new StateChangingException(error.state);
1253 }
1254 }
1255 }
1256
1257 private OnIqPacketReceived getIqPacketReceivedCallback(final IqPacket stanza)
1258 throws StateChangingException {
1259 final boolean isRequest =
1260 stanza.getType() == IqPacket.TYPE.GET || stanza.getType() == IqPacket.TYPE.SET;
1261 if (isRequest) {
1262 if (isBound) {
1263 return this.unregisteredIqListener;
1264 } else {
1265 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1266 }
1267 } else {
1268 synchronized (this.packetCallbacks) {
1269 final var pair = packetCallbacks.get(stanza.getId());
1270 if (pair == null) {
1271 return null;
1272 }
1273 if (pair.first.toServer(account)) {
1274 if (stanza.fromServer(account)) {
1275 packetCallbacks.remove(stanza.getId());
1276 return pair.second;
1277 } else {
1278 Log.e(
1279 Config.LOGTAG,
1280 account.getJid().asBareJid().toString()
1281 + ": ignoring spoofed iq packet");
1282 }
1283 } else {
1284 if (stanza.getFrom() != null && stanza.getFrom().equals(pair.first.getTo())) {
1285 packetCallbacks.remove(stanza.getId());
1286 return pair.second;
1287 } else {
1288 Log.e(
1289 Config.LOGTAG,
1290 account.getJid().asBareJid().toString()
1291 + ": ignoring spoofed iq packet");
1292 }
1293 }
1294 }
1295 }
1296 return null;
1297 }
1298
1299 private void processMessage(final Tag currentTag) throws IOException {
1300 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
1301 if (!packet.valid()) {
1302 Log.e(
1303 Config.LOGTAG,
1304 "encountered invalid message from='"
1305 + packet.getFrom()
1306 + "' to='"
1307 + packet.getTo()
1308 + "'");
1309 return;
1310 }
1311 this.messageListener.onMessagePacketReceived(account, packet);
1312 }
1313
1314 private void processPresence(final Tag currentTag) throws IOException {
1315 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
1316 if (!packet.valid()) {
1317 Log.e(
1318 Config.LOGTAG,
1319 "encountered invalid presence from='"
1320 + packet.getFrom()
1321 + "' to='"
1322 + packet.getTo()
1323 + "'");
1324 return;
1325 }
1326 this.presenceListener.onPresencePacketReceived(account, packet);
1327 }
1328
1329 private void sendStartTLS() throws IOException {
1330 final Tag startTLS = Tag.empty("starttls");
1331 startTLS.setAttribute("xmlns", Namespace.TLS);
1332 tagWriter.writeTag(startTLS);
1333 }
1334
1335 private void switchOverToTls() throws XmlPullParserException, IOException {
1336 tagReader.readTag();
1337 final Socket socket = this.socket;
1338 final SSLSocket sslSocket = upgradeSocketToTls(socket);
1339 this.socket = sslSocket;
1340 this.tagReader.setInputStream(sslSocket.getInputStream());
1341 this.tagWriter.setOutputStream(sslSocket.getOutputStream());
1342 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
1343 final boolean quickStart;
1344 try {
1345 quickStart = establishStream(SSLSockets.version(sslSocket));
1346 } catch (final InterruptedException e) {
1347 return;
1348 }
1349 if (quickStart) {
1350 this.quickStartInProgress = true;
1351 }
1352 features.encryptionEnabled = true;
1353 final Tag tag = tagReader.readTag();
1354 if (tag != null && tag.isStart("stream", Namespace.STREAMS)) {
1355 SSLSockets.log(account, sslSocket);
1356 processStream();
1357 } else {
1358 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
1359 }
1360 sslSocket.close();
1361 }
1362
1363 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
1364 final SSLSocketFactory sslSocketFactory;
1365 try {
1366 sslSocketFactory = getSSLSocketFactory();
1367 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
1368 throw new StateChangingException(Account.State.TLS_ERROR);
1369 }
1370 final InetAddress address = socket.getInetAddress();
1371 final SSLSocket sslSocket =
1372 (SSLSocket)
1373 sslSocketFactory.createSocket(
1374 socket, address.getHostAddress(), socket.getPort(), true);
1375 SSLSockets.setSecurity(sslSocket);
1376 SSLSockets.setHostname(sslSocket, IDN.toASCII(account.getServer()));
1377 SSLSockets.setApplicationProtocol(sslSocket, "xmpp-client");
1378 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
1379 try {
1380 if (!xmppDomainVerifier.verify(
1381 account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
1382 Log.d(
1383 Config.LOGTAG,
1384 account.getJid().asBareJid()
1385 + ": TLS certificate domain verification failed");
1386 FileBackend.close(sslSocket);
1387 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
1388 }
1389 } catch (final SSLPeerUnverifiedException e) {
1390 FileBackend.close(sslSocket);
1391 throw new StateChangingException(Account.State.TLS_ERROR);
1392 }
1393 return sslSocket;
1394 }
1395
1396 private void processStreamFeatures(final Tag currentTag) throws IOException {
1397 this.streamFeatures = tagReader.readElement(currentTag);
1398 final boolean isSecure = isSecure();
1399 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
1400 if (this.quickStartInProgress) {
1401 if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1402 Log.d(
1403 Config.LOGTAG,
1404 account.getJid().asBareJid()
1405 + ": quick start in progress. ignoring features: "
1406 + XmlHelper.printElementNames(this.streamFeatures));
1407 if (SaslMechanism.hashedToken(LoginInfo.mechanism(this.loginInfo))) {
1408 return;
1409 }
1410 if (isFastTokenAvailable(
1411 this.streamFeatures.findChild("authentication", Namespace.SASL_2))) {
1412 Log.d(
1413 Config.LOGTAG,
1414 account.getJid().asBareJid()
1415 + ": fast token available; resetting quick start");
1416 account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, false);
1417 mXmppConnectionService.databaseBackend.updateAccount(account);
1418 }
1419 return;
1420 }
1421 Log.d(
1422 Config.LOGTAG,
1423 account.getJid().asBareJid()
1424 + ": server lost support for SASL 2. quick start not possible");
1425 this.account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, false);
1426 mXmppConnectionService.databaseBackend.updateAccount(account);
1427 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1428 }
1429 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
1430 && !features.encryptionEnabled) {
1431 sendStartTLS();
1432 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1433 && account.isOptionSet(Account.OPTION_REGISTER)) {
1434 if (isSecure) {
1435 register();
1436 } else {
1437 Log.d(
1438 Config.LOGTAG,
1439 account.getJid().asBareJid()
1440 + ": unable to find STARTTLS for registration process "
1441 + XmlHelper.printElementNames(this.streamFeatures));
1442 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1443 }
1444 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1445 && account.isOptionSet(Account.OPTION_REGISTER)) {
1446 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
1447 } else if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)
1448 && shouldAuthenticate
1449 && isSecure) {
1450 authenticate(SaslMechanism.Version.SASL_2);
1451 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
1452 && shouldAuthenticate
1453 && isSecure) {
1454 authenticate(SaslMechanism.Version.SASL);
1455 } else if (this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT)
1456 && streamId != null
1457 && !inSmacksSession) {
1458 if (Config.EXTENDED_SM_LOGGING) {
1459 Log.d(
1460 Config.LOGTAG,
1461 account.getJid().asBareJid()
1462 + ": resuming after stanza #"
1463 + stanzasReceived);
1464 }
1465 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1466 this.mSmCatchupMessageCounter.set(0);
1467 this.mWaitingForSmCatchup.set(true);
1468 this.tagWriter.writeStanzaAsync(resume);
1469 } else if (needsBinding) {
1470 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
1471 sendBindRequest();
1472 } else {
1473 Log.d(
1474 Config.LOGTAG,
1475 account.getJid().asBareJid()
1476 + ": unable to find bind feature "
1477 + XmlHelper.printElementNames(this.streamFeatures));
1478 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1479 }
1480 } else {
1481
1482 Log.d(
1483 Config.LOGTAG,
1484 account.getJid().asBareJid()
1485 + ": received NOP stream features: "
1486 + XmlHelper.printElementNames(this.streamFeatures));
1487 }
1488 }
1489
1490 private void authenticate() throws IOException {
1491 final boolean isSecure = isSecure();
1492 if (isSecure && this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1493 authenticate(SaslMechanism.Version.SASL_2);
1494 } else if (isSecure && this.streamFeatures.hasChild("mechanisms", Namespace.SASL)) {
1495 authenticate(SaslMechanism.Version.SASL);
1496 } else {
1497 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1498 }
1499 }
1500
1501 private boolean isSecure() {
1502 return features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
1503 }
1504
1505 private void authenticate(final SaslMechanism.Version version) throws IOException {
1506 final Element authElement;
1507 if (version == SaslMechanism.Version.SASL) {
1508 authElement = this.streamFeatures.findChild("mechanisms", Namespace.SASL);
1509 } else {
1510 authElement = this.streamFeatures.findChild("authentication", Namespace.SASL_2);
1511 }
1512 final Collection<String> mechanisms = SaslMechanism.mechanisms(authElement);
1513 final Element cbElement =
1514 this.streamFeatures.findChild("sasl-channel-binding", Namespace.CHANNEL_BINDING);
1515 final Collection<ChannelBinding> channelBindings = ChannelBinding.of(cbElement);
1516 final SaslMechanism.Factory factory = new SaslMechanism.Factory(account);
1517 final SaslMechanism saslMechanism =
1518 factory.of(mechanisms, channelBindings, version, SSLSockets.version(this.socket));
1519 this.validate(saslMechanism, mechanisms);
1520 final boolean quickStartAvailable;
1521 final String firstMessage =
1522 saslMechanism.getClientFirstMessage(sslSocketOrNull(this.socket));
1523 final boolean usingFast = SaslMechanism.hashedToken(saslMechanism);
1524 final Element authenticate;
1525 if (version == SaslMechanism.Version.SASL) {
1526 authenticate = new Element("auth", Namespace.SASL);
1527 if (!Strings.isNullOrEmpty(firstMessage)) {
1528 authenticate.setContent(firstMessage);
1529 }
1530 quickStartAvailable = false;
1531 this.loginInfo = new LoginInfo(saslMechanism, version, Collections.emptyList());
1532 } else if (version == SaslMechanism.Version.SASL_2) {
1533 final Element inline = authElement.findChild("inline", Namespace.SASL_2);
1534 final boolean sm = inline != null && inline.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1535 final HashedToken.Mechanism hashTokenRequest;
1536 if (usingFast) {
1537 hashTokenRequest = null;
1538 } else {
1539 final Element fast =
1540 inline == null ? null : inline.findChild("fast", Namespace.FAST);
1541 final Collection<String> fastMechanisms = SaslMechanism.mechanisms(fast);
1542 hashTokenRequest =
1543 HashedToken.Mechanism.best(fastMechanisms, SSLSockets.version(this.socket));
1544 }
1545 final Collection<String> bindFeatures = Bind2.features(inline);
1546 quickStartAvailable =
1547 sm
1548 && bindFeatures != null
1549 && bindFeatures.containsAll(Bind2.QUICKSTART_FEATURES);
1550 if (bindFeatures != null) {
1551 try {
1552 mXmppConnectionService.restoredFromDatabaseLatch.await();
1553 } catch (final InterruptedException e) {
1554 Log.d(
1555 Config.LOGTAG,
1556 account.getJid().asBareJid()
1557 + ": interrupted while waiting for DB restore during SASL2 bind");
1558 return;
1559 }
1560 }
1561 this.loginInfo = new LoginInfo(saslMechanism, version, bindFeatures);
1562 this.hashTokenRequest = hashTokenRequest;
1563 authenticate =
1564 generateAuthenticationRequest(
1565 firstMessage, usingFast, hashTokenRequest, bindFeatures, sm);
1566 } else {
1567 throw new AssertionError("Missing implementation for " + version);
1568 }
1569
1570 if (account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, quickStartAvailable)) {
1571 mXmppConnectionService.databaseBackend.updateAccount(account);
1572 }
1573
1574 Log.d(
1575 Config.LOGTAG,
1576 account.getJid().toString()
1577 + ": Authenticating with "
1578 + version
1579 + "/"
1580 + LoginInfo.mechanism(this.loginInfo).getMechanism());
1581 authenticate.setAttribute("mechanism", LoginInfo.mechanism(this.loginInfo).getMechanism());
1582 synchronized (this.mStanzaQueue) {
1583 this.stanzasSentBeforeAuthentication = this.stanzasSent;
1584 tagWriter.writeElement(authenticate);
1585 }
1586 }
1587
1588 private static boolean isFastTokenAvailable(final Element authentication) {
1589 final Element inline = authentication == null ? null : authentication.findChild("inline");
1590 return inline != null && inline.hasChild("fast", Namespace.FAST);
1591 }
1592
1593 private void validate(
1594 final @Nullable SaslMechanism saslMechanism, Collection<String> mechanisms)
1595 throws StateChangingException {
1596 if (saslMechanism == null) {
1597 Log.d(
1598 Config.LOGTAG,
1599 account.getJid().asBareJid()
1600 + ": unable to find supported SASL mechanism in "
1601 + mechanisms);
1602 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1603 }
1604 if (SaslMechanism.hashedToken(saslMechanism)) {
1605 return;
1606 }
1607 final int pinnedMechanism = account.getPinnedMechanismPriority();
1608 if (pinnedMechanism > saslMechanism.getPriority()) {
1609 Log.e(
1610 Config.LOGTAG,
1611 "Auth failed. Authentication mechanism "
1612 + saslMechanism.getMechanism()
1613 + " has lower priority ("
1614 + saslMechanism.getPriority()
1615 + ") than pinned priority ("
1616 + pinnedMechanism
1617 + "). Possible downgrade attack?");
1618 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1619 }
1620 }
1621
1622 private Element generateAuthenticationRequest(
1623 final String firstMessage, final boolean usingFast) {
1624 return generateAuthenticationRequest(
1625 firstMessage, usingFast, null, Bind2.QUICKSTART_FEATURES, true);
1626 }
1627
1628 private Element generateAuthenticationRequest(
1629 final String firstMessage,
1630 final boolean usingFast,
1631 final HashedToken.Mechanism hashedTokenRequest,
1632 final Collection<String> bind,
1633 final boolean inlineStreamManagement) {
1634 final Element authenticate = new Element("authenticate", Namespace.SASL_2);
1635 if (!Strings.isNullOrEmpty(firstMessage)) {
1636 authenticate.addChild("initial-response").setContent(firstMessage);
1637 }
1638 final Element userAgent = authenticate.addChild("user-agent");
1639 userAgent.setAttribute("id", AccountUtils.publicDeviceId(account));
1640 userAgent
1641 .addChild("software")
1642 .setContent(mXmppConnectionService.getString(R.string.app_name));
1643 if (!PhoneHelper.isEmulator()) {
1644 userAgent
1645 .addChild("device")
1646 .setContent(String.format("%s %s", Build.MANUFACTURER, Build.MODEL));
1647 }
1648 // do not include bind if 'inlineStreamManagement' is missing and we have a streamId
1649 // (because we would rather just do a normal SM/resume)
1650 final boolean mayAttemptBind = streamId == null || inlineStreamManagement;
1651 if (bind != null && mayAttemptBind) {
1652 authenticate.addChild(generateBindRequest(bind));
1653 }
1654 if (inlineStreamManagement && streamId != null) {
1655 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1656 this.mSmCatchupMessageCounter.set(0);
1657 this.mWaitingForSmCatchup.set(true);
1658 authenticate.addChild(resume);
1659 }
1660 if (hashedTokenRequest != null) {
1661 authenticate
1662 .addChild("request-token", Namespace.FAST)
1663 .setAttribute("mechanism", hashedTokenRequest.name());
1664 }
1665 if (usingFast) {
1666 authenticate.addChild("fast", Namespace.FAST);
1667 }
1668 return authenticate;
1669 }
1670
1671 private Element generateBindRequest(final Collection<String> bindFeatures) {
1672 Log.d(Config.LOGTAG, "inline bind features: " + bindFeatures);
1673 final Element bind = new Element("bind", Namespace.BIND2);
1674 bind.addChild("tag").setContent(mXmppConnectionService.getString(R.string.app_name));
1675 if (bindFeatures.contains(Namespace.CARBONS)) {
1676 bind.addChild("enable", Namespace.CARBONS);
1677 }
1678 if (bindFeatures.contains(Namespace.STREAM_MANAGEMENT)) {
1679 bind.addChild(new EnablePacket());
1680 }
1681 return bind;
1682 }
1683
1684 private void register() {
1685 final String preAuth = account.getKey(Account.KEY_PRE_AUTH_REGISTRATION_TOKEN);
1686 if (preAuth != null && features.invite()) {
1687 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1688 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1689 sendUnmodifiedIqPacket(
1690 preAuthRequest,
1691 (account, response) -> {
1692 if (response.getType() == IqPacket.TYPE.RESULT) {
1693 sendRegistryRequest();
1694 } else {
1695 final String error = response.getErrorCondition();
1696 Log.d(
1697 Config.LOGTAG,
1698 account.getJid().asBareJid()
1699 + ": failed to pre auth. "
1700 + error);
1701 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1702 }
1703 },
1704 true);
1705 } else {
1706 sendRegistryRequest();
1707 }
1708 }
1709
1710 private void sendRegistryRequest() {
1711 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1712 register.query(Namespace.REGISTER);
1713 register.setTo(account.getDomain());
1714 sendUnmodifiedIqPacket(
1715 register,
1716 (account, packet) -> {
1717 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1718 return;
1719 }
1720 if (packet.getType() == IqPacket.TYPE.ERROR) {
1721 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1722 }
1723 final Element query = packet.query(Namespace.REGISTER);
1724 if (query.hasChild("username") && (query.hasChild("password"))) {
1725 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1726 final Element username =
1727 new Element("username").setContent(account.getUsername());
1728 final Element password =
1729 new Element("password").setContent(account.getPassword());
1730 register1.query(Namespace.REGISTER).addChild(username);
1731 register1.query().addChild(password);
1732 register1.setFrom(account.getJid().asBareJid());
1733 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1734 } else if (query.hasChild("x", Namespace.DATA)) {
1735 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1736 final Element blob = query.findChild("data", "urn:xmpp:bob");
1737 final String id = packet.getId();
1738 InputStream is;
1739 if (blob != null) {
1740 try {
1741 final String base64Blob = blob.getContent();
1742 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1743 is = new ByteArrayInputStream(strBlob);
1744 } catch (Exception e) {
1745 is = null;
1746 }
1747 } else {
1748 final boolean useTor =
1749 mXmppConnectionService.useTorToConnect() || account.isOnion();
1750 try {
1751 final String url = data.getValue("url");
1752 final String fallbackUrl = data.getValue("captcha-fallback-url");
1753 if (url != null) {
1754 is = HttpConnectionManager.open(url, useTor);
1755 } else if (fallbackUrl != null) {
1756 is = HttpConnectionManager.open(fallbackUrl, useTor);
1757 } else {
1758 is = null;
1759 }
1760 } catch (final IOException e) {
1761 Log.d(
1762 Config.LOGTAG,
1763 account.getJid().asBareJid() + ": unable to fetch captcha",
1764 e);
1765 is = null;
1766 }
1767 }
1768
1769 if (is != null) {
1770 Bitmap captcha = BitmapFactory.decodeStream(is);
1771 try {
1772 if (mXmppConnectionService.displayCaptchaRequest(
1773 account, id, data, captcha)) {
1774 return;
1775 }
1776 } catch (Exception e) {
1777 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1778 }
1779 }
1780 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1781 } else if (query.hasChild("instructions")
1782 || query.hasChild("x", Namespace.OOB)) {
1783 final String instructions = query.findChildContent("instructions");
1784 final Element oob = query.findChild("x", Namespace.OOB);
1785 final String url = oob == null ? null : oob.findChildContent("url");
1786 if (url != null) {
1787 setAccountCreationFailed(url);
1788 } else if (instructions != null) {
1789 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1790 if (matcher.find()) {
1791 setAccountCreationFailed(
1792 instructions.substring(matcher.start(), matcher.end()));
1793 }
1794 }
1795 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1796 }
1797 },
1798 true);
1799 }
1800
1801 private void setAccountCreationFailed(final String url) {
1802 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1803 if (httpUrl != null && httpUrl.isHttps()) {
1804 this.redirectionUrl = httpUrl;
1805 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1806 }
1807 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1808 }
1809
1810 public HttpUrl getRedirectionUrl() {
1811 return this.redirectionUrl;
1812 }
1813
1814 public void resetEverything() {
1815 resetAttemptCount(true);
1816 resetStreamId();
1817 clearIqCallbacks();
1818 this.stanzasSent = 0;
1819 mStanzaQueue.clear();
1820 this.redirectionUrl = null;
1821 synchronized (this.disco) {
1822 disco.clear();
1823 }
1824 synchronized (this.commands) {
1825 this.commands.clear();
1826 }
1827 this.loginInfo = null;
1828 }
1829
1830 private void sendBindRequest() {
1831 try {
1832 mXmppConnectionService.restoredFromDatabaseLatch.await();
1833 } catch (InterruptedException e) {
1834 Log.d(
1835 Config.LOGTAG,
1836 account.getJid().asBareJid()
1837 + ": interrupted while waiting for DB restore during bind");
1838 return;
1839 }
1840 clearIqCallbacks();
1841 if (account.getJid().isBareJid()) {
1842 account.setResource(this.createNewResource());
1843 } else {
1844 fixResource(mXmppConnectionService, account);
1845 }
1846 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1847 final String resource =
1848 Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1849 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1850 this.sendUnmodifiedIqPacket(
1851 iq,
1852 (account, packet) -> {
1853 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1854 return;
1855 }
1856 final Element bind = packet.findChild("bind");
1857 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1858 isBound = true;
1859 final Element jid = bind.findChild("jid");
1860 if (jid != null && jid.getContent() != null) {
1861 try {
1862 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1863 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1864 Log.d(
1865 Config.LOGTAG,
1866 account.getJid().asBareJid()
1867 + ": server tried to re-assign domain to "
1868 + assignedJid.getDomain());
1869 throw new StateChangingError(Account.State.BIND_FAILURE);
1870 }
1871 if (account.setJid(assignedJid)) {
1872 Log.d(
1873 Config.LOGTAG,
1874 account.getJid().asBareJid()
1875 + ": jid changed during bind. updating database");
1876 mXmppConnectionService.databaseBackend.updateAccount(account);
1877 }
1878 if (streamFeatures.hasChild("session")
1879 && !streamFeatures
1880 .findChild("session")
1881 .hasChild("optional")) {
1882 sendStartSession();
1883 } else {
1884 final boolean waitForDisco = enableStreamManagement();
1885 sendPostBindInitialization(waitForDisco, false);
1886 }
1887 return;
1888 } catch (final IllegalArgumentException e) {
1889 Log.d(
1890 Config.LOGTAG,
1891 account.getJid().asBareJid()
1892 + ": server reported invalid jid ("
1893 + jid.getContent()
1894 + ") on bind");
1895 }
1896 } else {
1897 Log.d(
1898 Config.LOGTAG,
1899 account.getJid()
1900 + ": disconnecting because of bind failure. (no jid)");
1901 }
1902 } else {
1903 Log.d(
1904 Config.LOGTAG,
1905 account.getJid()
1906 + ": disconnecting because of bind failure ("
1907 + packet);
1908 }
1909 final Element error = packet.findChild("error");
1910 if (packet.getType() == IqPacket.TYPE.ERROR
1911 && error != null
1912 && error.hasChild("conflict")) {
1913 account.setResource(createNewResource());
1914 }
1915 throw new StateChangingError(Account.State.BIND_FAILURE);
1916 },
1917 true);
1918 }
1919
1920 private void clearIqCallbacks() {
1921 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1922 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1923 synchronized (this.packetCallbacks) {
1924 if (this.packetCallbacks.size() == 0) {
1925 return;
1926 }
1927 Log.d(
1928 Config.LOGTAG,
1929 account.getJid().asBareJid()
1930 + ": clearing "
1931 + this.packetCallbacks.size()
1932 + " iq callbacks");
1933 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator =
1934 this.packetCallbacks.values().iterator();
1935 while (iterator.hasNext()) {
1936 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1937 callbacks.add(entry.second);
1938 iterator.remove();
1939 }
1940 }
1941 for (OnIqPacketReceived callback : callbacks) {
1942 try {
1943 callback.onIqPacketReceived(account, failurePacket);
1944 } catch (StateChangingError error) {
1945 Log.d(
1946 Config.LOGTAG,
1947 account.getJid().asBareJid()
1948 + ": caught StateChangingError("
1949 + error.state.toString()
1950 + ") while clearing callbacks");
1951 // ignore
1952 }
1953 }
1954 Log.d(
1955 Config.LOGTAG,
1956 account.getJid().asBareJid()
1957 + ": done clearing iq callbacks. "
1958 + this.packetCallbacks.size()
1959 + " left");
1960 }
1961
1962 public void sendDiscoTimeout() {
1963 if (mWaitForDisco.compareAndSet(true, false)) {
1964 Log.d(
1965 Config.LOGTAG,
1966 account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1967 finalizeBind();
1968 }
1969 }
1970
1971 private void sendStartSession() {
1972 Log.d(
1973 Config.LOGTAG,
1974 account.getJid().asBareJid() + ": sending legacy session to outdated server");
1975 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1976 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1977 this.sendUnmodifiedIqPacket(
1978 startSession,
1979 (account, packet) -> {
1980 if (packet.getType() == IqPacket.TYPE.RESULT) {
1981 final boolean waitForDisco = enableStreamManagement();
1982 sendPostBindInitialization(waitForDisco, false);
1983 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1984 throw new StateChangingError(Account.State.SESSION_FAILURE);
1985 }
1986 },
1987 true);
1988 }
1989
1990 private boolean enableStreamManagement() {
1991 final boolean streamManagement =
1992 this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1993 if (streamManagement) {
1994 synchronized (this.mStanzaQueue) {
1995 final EnablePacket enable = new EnablePacket();
1996 tagWriter.writeStanzaAsync(enable);
1997 stanzasSent = 0;
1998 mStanzaQueue.clear();
1999 }
2000 return true;
2001 } else {
2002 return false;
2003 }
2004 }
2005
2006 private void sendPostBindInitialization(
2007 final boolean waitForDisco, final boolean carbonsEnabled) {
2008 features.carbonsEnabled = carbonsEnabled;
2009 features.blockListRequested = false;
2010 synchronized (this.disco) {
2011 this.disco.clear();
2012 }
2013 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
2014 mPendingServiceDiscoveries.set(0);
2015 mWaitForDisco.set(waitForDisco);
2016 lastDiscoStarted = SystemClock.elapsedRealtime();
2017 mXmppConnectionService.scheduleWakeUpCall(
2018 Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
2019 final Element caps = streamFeatures.findChild("c");
2020 final String hash = caps == null ? null : caps.getAttribute("hash");
2021 final String ver = caps == null ? null : caps.getAttribute("ver");
2022 ServiceDiscoveryResult discoveryResult = null;
2023 if (hash != null && ver != null) {
2024 discoveryResult =
2025 mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
2026 }
2027 final boolean requestDiscoItemsFirst =
2028 !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
2029 if (requestDiscoItemsFirst) {
2030 sendServiceDiscoveryItems(account.getDomain());
2031 }
2032 if (discoveryResult == null) {
2033 sendServiceDiscoveryInfo(account.getDomain());
2034 } else {
2035 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
2036 disco.put(account.getDomain(), discoveryResult);
2037 }
2038 discoverMamPreferences();
2039 sendServiceDiscoveryInfo(account.getJid().asBareJid());
2040 if (!requestDiscoItemsFirst) {
2041 sendServiceDiscoveryItems(account.getDomain());
2042 }
2043
2044 if (!mWaitForDisco.get()) {
2045 finalizeBind();
2046 }
2047 this.lastSessionStarted = SystemClock.elapsedRealtime();
2048 }
2049
2050 private void sendServiceDiscoveryInfo(final Jid jid) {
2051 mPendingServiceDiscoveries.incrementAndGet();
2052 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2053 iq.setTo(jid);
2054 iq.query("http://jabber.org/protocol/disco#info");
2055 this.sendIqPacket(
2056 iq,
2057 (account, packet) -> {
2058 if (packet.getType() == IqPacket.TYPE.RESULT) {
2059 boolean advancedStreamFeaturesLoaded;
2060 synchronized (XmppConnection.this.disco) {
2061 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
2062 if (jid.equals(account.getDomain())) {
2063 mXmppConnectionService.databaseBackend.insertDiscoveryResult(
2064 result);
2065 }
2066 disco.put(jid, result);
2067 advancedStreamFeaturesLoaded =
2068 disco.containsKey(account.getDomain())
2069 && disco.containsKey(account.getJid().asBareJid());
2070 }
2071 if (advancedStreamFeaturesLoaded
2072 && (jid.equals(account.getDomain())
2073 || jid.equals(account.getJid().asBareJid()))) {
2074 enableAdvancedStreamFeatures();
2075 }
2076 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
2077 Log.d(
2078 Config.LOGTAG,
2079 account.getJid().asBareJid()
2080 + ": could not query disco info for "
2081 + jid.toString());
2082 final boolean serverOrAccount =
2083 jid.equals(account.getDomain())
2084 || jid.equals(account.getJid().asBareJid());
2085 final boolean advancedStreamFeaturesLoaded;
2086 if (serverOrAccount) {
2087 synchronized (XmppConnection.this.disco) {
2088 disco.put(jid, ServiceDiscoveryResult.empty());
2089 advancedStreamFeaturesLoaded =
2090 disco.containsKey(account.getDomain())
2091 && disco.containsKey(account.getJid().asBareJid());
2092 }
2093 } else {
2094 advancedStreamFeaturesLoaded = false;
2095 }
2096 if (advancedStreamFeaturesLoaded) {
2097 enableAdvancedStreamFeatures();
2098 }
2099 }
2100 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2101 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2102 && mWaitForDisco.compareAndSet(true, false)) {
2103 finalizeBind();
2104 }
2105 }
2106 });
2107 }
2108
2109 private void discoverMamPreferences() {
2110 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2111 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
2112 sendIqPacket(
2113 request,
2114 (account, response) -> {
2115 if (response.getType() == IqPacket.TYPE.RESULT) {
2116 Element prefs =
2117 response.findChild(
2118 "prefs", MessageArchiveService.Version.MAM_2.namespace);
2119 isMamPreferenceAlways =
2120 "always"
2121 .equals(
2122 prefs == null
2123 ? null
2124 : prefs.getAttribute("default"));
2125 }
2126 });
2127 }
2128
2129 private void discoverCommands() {
2130 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2131 request.setTo(account.getDomain());
2132 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
2133 sendIqPacket(
2134 request,
2135 (account, response) -> {
2136 if (response.getType() == IqPacket.TYPE.RESULT) {
2137 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
2138 if (query == null) {
2139 return;
2140 }
2141 final HashMap<String, Jid> commands = new HashMap<>();
2142 for (final Element child : query.getChildren()) {
2143 if ("item".equals(child.getName())) {
2144 final String node = child.getAttribute("node");
2145 final Jid jid = child.getAttributeAsJid("jid");
2146 if (node != null && jid != null) {
2147 commands.put(node, jid);
2148 }
2149 }
2150 }
2151 synchronized (this.commands) {
2152 this.commands.clear();
2153 this.commands.putAll(commands);
2154 }
2155 }
2156 });
2157 }
2158
2159 public boolean isMamPreferenceAlways() {
2160 return isMamPreferenceAlways;
2161 }
2162
2163 private void finalizeBind() {
2164 if (bindListener != null) {
2165 bindListener.onBind(account);
2166 }
2167 changeStatusToOnline();
2168 }
2169
2170 private void enableAdvancedStreamFeatures() {
2171 if (getFeatures().blocking() && !features.blockListRequested) {
2172 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
2173 this.sendIqPacket(
2174 getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
2175 }
2176 for (final OnAdvancedStreamFeaturesLoaded listener :
2177 advancedStreamFeaturesLoadedListeners) {
2178 listener.onAdvancedStreamFeaturesAvailable(account);
2179 }
2180 if (getFeatures().carbons() && !features.carbonsEnabled) {
2181 sendEnableCarbons();
2182 }
2183 if (getFeatures().commands()) {
2184 discoverCommands();
2185 }
2186 }
2187
2188 private void sendServiceDiscoveryItems(final Jid server) {
2189 mPendingServiceDiscoveries.incrementAndGet();
2190 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2191 iq.setTo(server.getDomain());
2192 iq.query("http://jabber.org/protocol/disco#items");
2193 this.sendIqPacket(
2194 iq,
2195 (account, packet) -> {
2196 if (packet.getType() == IqPacket.TYPE.RESULT) {
2197 final HashSet<Jid> items = new HashSet<>();
2198 final List<Element> elements = packet.query().getChildren();
2199 for (final Element element : elements) {
2200 if (element.getName().equals("item")) {
2201 final Jid jid =
2202 InvalidJid.getNullForInvalid(
2203 element.getAttributeAsJid("jid"));
2204 if (jid != null && !jid.equals(account.getDomain())) {
2205 items.add(jid);
2206 }
2207 }
2208 }
2209 for (Jid jid : items) {
2210 sendServiceDiscoveryInfo(jid);
2211 }
2212 } else {
2213 Log.d(
2214 Config.LOGTAG,
2215 account.getJid().asBareJid()
2216 + ": could not query disco items of "
2217 + server);
2218 }
2219 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2220 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2221 && mWaitForDisco.compareAndSet(true, false)) {
2222 finalizeBind();
2223 }
2224 }
2225 });
2226 }
2227
2228 private void sendEnableCarbons() {
2229 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
2230 iq.addChild("enable", Namespace.CARBONS);
2231 this.sendIqPacket(
2232 iq,
2233 (account, packet) -> {
2234 if (packet.getType() == IqPacket.TYPE.RESULT) {
2235 Log.d(
2236 Config.LOGTAG,
2237 account.getJid().asBareJid() + ": successfully enabled carbons");
2238 features.carbonsEnabled = true;
2239 } else {
2240 Log.d(
2241 Config.LOGTAG,
2242 account.getJid().asBareJid()
2243 + ": could not enable carbons "
2244 + packet);
2245 }
2246 });
2247 }
2248
2249 private void processStreamError(final Tag currentTag) throws IOException {
2250 final Element streamError = tagReader.readElement(currentTag);
2251 if (streamError == null) {
2252 return;
2253 }
2254 if (streamError.hasChild("conflict")) {
2255 account.setResource(createNewResource());
2256 Log.d(
2257 Config.LOGTAG,
2258 account.getJid().asBareJid()
2259 + ": switching resource due to conflict ("
2260 + account.getResource()
2261 + ")");
2262 throw new IOException();
2263 } else if (streamError.hasChild("host-unknown")) {
2264 throw new StateChangingException(Account.State.HOST_UNKNOWN);
2265 } else if (streamError.hasChild("policy-violation")) {
2266 this.lastConnect = SystemClock.elapsedRealtime();
2267 final String text = streamError.findChildContent("text");
2268 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
2269 failPendingMessages(text);
2270 throw new StateChangingException(Account.State.POLICY_VIOLATION);
2271 } else if (streamError.hasChild("see-other-host")) {
2272 final String seeOtherHost = streamError.findChildContent("see-other-host");
2273 final Resolver.Result currentResolverResult = this.currentResolverResult;
2274 if (Strings.isNullOrEmpty(seeOtherHost) || currentResolverResult == null) {
2275 Log.d(
2276 Config.LOGTAG,
2277 account.getJid().asBareJid() + ": stream error " + streamError);
2278 throw new StateChangingException(Account.State.STREAM_ERROR);
2279 }
2280 Log.d(
2281 Config.LOGTAG,
2282 account.getJid().asBareJid()
2283 + ": see other host: "
2284 + seeOtherHost
2285 + " "
2286 + currentResolverResult);
2287 final Resolver.Result seeOtherResult = currentResolverResult.seeOtherHost(seeOtherHost);
2288 if (seeOtherResult != null) {
2289 this.seeOtherHostResolverResult = seeOtherResult;
2290 throw new StateChangingException(Account.State.SEE_OTHER_HOST);
2291 } else {
2292 throw new StateChangingException(Account.State.STREAM_ERROR);
2293 }
2294 } else {
2295 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
2296 throw new StateChangingException(Account.State.STREAM_ERROR);
2297 }
2298 }
2299
2300 private void failPendingMessages(final String error) {
2301 synchronized (this.mStanzaQueue) {
2302 for (int i = 0; i < mStanzaQueue.size(); ++i) {
2303 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
2304 if (stanza instanceof MessagePacket) {
2305 final MessagePacket packet = (MessagePacket) stanza;
2306 final String id = packet.getId();
2307 final Jid to = packet.getTo();
2308 mXmppConnectionService.markMessage(
2309 account, to.asBareJid(), id, Message.STATUS_SEND_FAILED, error);
2310 }
2311 }
2312 }
2313 }
2314
2315 private boolean establishStream(final SSLSockets.Version sslVersion)
2316 throws IOException, InterruptedException {
2317 final boolean secureConnection = sslVersion != SSLSockets.Version.NONE;
2318 final SaslMechanism quickStartMechanism;
2319 if (secureConnection) {
2320 quickStartMechanism =
2321 SaslMechanism.ensureAvailable(account.getQuickStartMechanism(), sslVersion);
2322 } else {
2323 quickStartMechanism = null;
2324 }
2325 if (secureConnection
2326 && Config.QUICKSTART_ENABLED
2327 && quickStartMechanism != null
2328 && account.isOptionSet(Account.OPTION_QUICKSTART_AVAILABLE)) {
2329 mXmppConnectionService.restoredFromDatabaseLatch.await();
2330 this.loginInfo =
2331 new LoginInfo(
2332 quickStartMechanism,
2333 SaslMechanism.Version.SASL_2,
2334 Bind2.QUICKSTART_FEATURES);
2335 final boolean usingFast = quickStartMechanism instanceof HashedToken;
2336 final Element authenticate =
2337 generateAuthenticationRequest(
2338 quickStartMechanism.getClientFirstMessage(sslSocketOrNull(this.socket)),
2339 usingFast);
2340 authenticate.setAttribute("mechanism", quickStartMechanism.getMechanism());
2341 sendStartStream(true, false);
2342 synchronized (this.mStanzaQueue) {
2343 this.stanzasSentBeforeAuthentication = this.stanzasSent;
2344 tagWriter.writeElement(authenticate);
2345 }
2346 Log.d(
2347 Config.LOGTAG,
2348 account.getJid().toString()
2349 + ": quick start with "
2350 + quickStartMechanism.getMechanism());
2351 return true;
2352 } else {
2353 sendStartStream(secureConnection, true);
2354 return false;
2355 }
2356 }
2357
2358 private void sendStartStream(final boolean from, final boolean flush) throws IOException {
2359 final Tag stream = Tag.start("stream:stream");
2360 stream.setAttribute("to", account.getServer());
2361 if (from) {
2362 stream.setAttribute("from", account.getJid().asBareJid().toEscapedString());
2363 }
2364 stream.setAttribute("version", "1.0");
2365 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
2366 stream.setAttribute("xmlns", Namespace.JABBER_CLIENT);
2367 stream.setAttribute("xmlns:stream", Namespace.STREAMS);
2368 tagWriter.writeTag(stream, flush);
2369 }
2370
2371 private String createNewResource() {
2372 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
2373 }
2374
2375 private String nextRandomId() {
2376 return nextRandomId(false);
2377 }
2378
2379 private String nextRandomId(final boolean s) {
2380 return CryptoHelper.random(s ? 3 : 9);
2381 }
2382
2383 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
2384 packet.setFrom(account.getJid());
2385 return this.sendUnmodifiedIqPacket(packet, callback, false);
2386 }
2387
2388 public synchronized String sendUnmodifiedIqPacket(
2389 final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
2390 if (packet.getId() == null) {
2391 packet.setAttribute("id", nextRandomId());
2392 }
2393 if (callback != null) {
2394 synchronized (this.packetCallbacks) {
2395 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
2396 }
2397 }
2398 this.sendPacket(packet, force);
2399 return packet.getId();
2400 }
2401
2402 public void sendMessagePacket(final MessagePacket packet) {
2403 this.sendPacket(packet);
2404 }
2405
2406 public void sendPresencePacket(final PresencePacket packet) {
2407 this.sendPacket(packet);
2408 }
2409
2410 private synchronized void sendPacket(final AbstractStanza packet) {
2411 sendPacket(packet, false);
2412 }
2413
2414 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
2415 if (stanzasSent == Integer.MAX_VALUE) {
2416 resetStreamId();
2417 disconnect(true);
2418 return;
2419 }
2420 synchronized (this.mStanzaQueue) {
2421 if (force || isBound) {
2422 tagWriter.writeStanzaAsync(packet);
2423 } else {
2424 Log.d(
2425 Config.LOGTAG,
2426 account.getJid().asBareJid()
2427 + " do not write stanza to unbound stream "
2428 + packet.toString());
2429 }
2430 if (packet instanceof AbstractAcknowledgeableStanza) {
2431 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
2432
2433 if (this.mStanzaQueue.size() != 0) {
2434 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
2435 if (currentHighestKey != stanzasSent) {
2436 throw new AssertionError("Stanza count messed up");
2437 }
2438 }
2439
2440 ++stanzasSent;
2441 if (Config.EXTENDED_SM_LOGGING) {
2442 Log.d(
2443 Config.LOGTAG,
2444 account.getJid().asBareJid()
2445 + ": counting outbound "
2446 + packet.getName()
2447 + " as #"
2448 + stanzasSent);
2449 }
2450 this.mStanzaQueue.append(stanzasSent, stanza);
2451 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
2452 if (Config.EXTENDED_SM_LOGGING) {
2453 Log.d(
2454 Config.LOGTAG,
2455 account.getJid().asBareJid()
2456 + ": requesting ack for message stanza #"
2457 + stanzasSent);
2458 }
2459 tagWriter.writeStanzaAsync(new RequestPacket());
2460 }
2461 }
2462 }
2463 }
2464
2465 public void sendPing() {
2466 if (!r()) {
2467 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2468 iq.setFrom(account.getJid());
2469 iq.addChild("ping", Namespace.PING);
2470 this.sendIqPacket(iq, null);
2471 }
2472 this.lastPingSent = SystemClock.elapsedRealtime();
2473 }
2474
2475 public void setOnMessagePacketReceivedListener(final OnMessagePacketReceived listener) {
2476 this.messageListener = listener;
2477 }
2478
2479 public void setOnUnregisteredIqPacketReceivedListener(final OnIqPacketReceived listener) {
2480 this.unregisteredIqListener = listener;
2481 }
2482
2483 public void setOnPresencePacketReceivedListener(final OnPresencePacketReceived listener) {
2484 this.presenceListener = listener;
2485 }
2486
2487 public void setOnJinglePacketReceivedListener(final OnJinglePacketReceived listener) {
2488 this.jingleListener = listener;
2489 }
2490
2491 public void setOnStatusChangedListener(final OnStatusChanged listener) {
2492 this.statusListener = listener;
2493 }
2494
2495 public void setOnBindListener(final OnBindListener listener) {
2496 this.bindListener = listener;
2497 }
2498
2499 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
2500 this.acknowledgedListener = listener;
2501 }
2502
2503 public void addOnAdvancedStreamFeaturesAvailableListener(
2504 final OnAdvancedStreamFeaturesLoaded listener) {
2505 this.advancedStreamFeaturesLoadedListeners.add(listener);
2506 }
2507
2508 private void forceCloseSocket() {
2509 FileBackend.close(this.socket);
2510 FileBackend.close(this.tagReader);
2511 }
2512
2513 public void interrupt() {
2514 if (this.mThread != null) {
2515 this.mThread.interrupt();
2516 }
2517 }
2518
2519 public void disconnect(final boolean force) {
2520 interrupt();
2521 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
2522 if (force) {
2523 forceCloseSocket();
2524 } else {
2525 final TagWriter currentTagWriter = this.tagWriter;
2526 if (currentTagWriter.isActive()) {
2527 currentTagWriter.finish();
2528 final Socket currentSocket = this.socket;
2529 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
2530 try {
2531 currentTagWriter.await(1, TimeUnit.SECONDS);
2532 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
2533 currentTagWriter.writeTag(Tag.end("stream:stream"));
2534 if (streamCountDownLatch != null) {
2535 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
2536 Log.d(
2537 Config.LOGTAG,
2538 account.getJid().asBareJid() + ": remote ended stream");
2539 } else {
2540 Log.d(
2541 Config.LOGTAG,
2542 account.getJid().asBareJid()
2543 + ": remote has not closed socket. force closing");
2544 }
2545 }
2546 } catch (InterruptedException e) {
2547 Log.d(
2548 Config.LOGTAG,
2549 account.getJid().asBareJid()
2550 + ": interrupted while gracefully closing stream");
2551 } catch (final IOException e) {
2552 Log.d(
2553 Config.LOGTAG,
2554 account.getJid().asBareJid()
2555 + ": io exception during disconnect ("
2556 + e.getMessage()
2557 + ")");
2558 } finally {
2559 FileBackend.close(currentSocket);
2560 }
2561 } else {
2562 forceCloseSocket();
2563 }
2564 }
2565 }
2566
2567 private void resetStreamId() {
2568 this.streamId = null;
2569 this.boundStreamFeatures = null;
2570 }
2571
2572 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
2573 synchronized (this.disco) {
2574 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
2575 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
2576 if (cursor.getValue().getFeatures().contains(feature)) {
2577 items.add(cursor);
2578 }
2579 }
2580 return items;
2581 }
2582 }
2583
2584 public Jid findDiscoItemByFeature(final String feature) {
2585 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
2586 if (items.size() >= 1) {
2587 return items.get(0).getKey();
2588 }
2589 return null;
2590 }
2591
2592 public boolean r() {
2593 if (getFeatures().sm()) {
2594 this.tagWriter.writeStanzaAsync(new RequestPacket());
2595 return true;
2596 } else {
2597 return false;
2598 }
2599 }
2600
2601 public List<String> getMucServersWithholdAccount() {
2602 final List<String> servers = getMucServers();
2603 servers.remove(account.getDomain().toEscapedString());
2604 return servers;
2605 }
2606
2607 public List<String> getMucServers() {
2608 List<String> servers = new ArrayList<>();
2609 synchronized (this.disco) {
2610 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
2611 final ServiceDiscoveryResult value = cursor.getValue();
2612 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
2613 && value.hasIdentity("conference", "text")
2614 && !value.getFeatures().contains("jabber:iq:gateway")
2615 && !value.hasIdentity("conference", "irc")) {
2616 servers.add(cursor.getKey().toString());
2617 }
2618 }
2619 }
2620 return servers;
2621 }
2622
2623 public String getMucServer() {
2624 List<String> servers = getMucServers();
2625 return servers.size() > 0 ? servers.get(0) : null;
2626 }
2627
2628 public int getTimeToNextAttempt(final boolean aggressive) {
2629 final int interval;
2630 if (aggressive) {
2631 interval = Math.min((int) (3 * Math.pow(1.3, attempt)), 60);
2632 } else {
2633 final int additionalTime =
2634 account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
2635 interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
2636 }
2637 final int secondsSinceLast =
2638 (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
2639 return interval - secondsSinceLast;
2640 }
2641
2642 public int getAttempt() {
2643 return this.attempt;
2644 }
2645
2646 public Features getFeatures() {
2647 return this.features;
2648 }
2649
2650 public long getLastSessionEstablished() {
2651 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
2652 return System.currentTimeMillis() - diff;
2653 }
2654
2655 public long getLastConnect() {
2656 return this.lastConnect;
2657 }
2658
2659 public long getLastPingSent() {
2660 return this.lastPingSent;
2661 }
2662
2663 public long getLastDiscoStarted() {
2664 return this.lastDiscoStarted;
2665 }
2666
2667 public long getLastPacketReceived() {
2668 return this.lastPacketReceived;
2669 }
2670
2671 public void sendActive() {
2672 this.sendPacket(new ActivePacket());
2673 }
2674
2675 public void sendInactive() {
2676 this.sendPacket(new InactivePacket());
2677 }
2678
2679 public void resetAttemptCount(boolean resetConnectTime) {
2680 this.attempt = 0;
2681 if (resetConnectTime) {
2682 this.lastConnect = 0;
2683 }
2684 }
2685
2686 public void setInteractive(boolean interactive) {
2687 this.mInteractive = interactive;
2688 }
2689
2690 private IqGenerator getIqGenerator() {
2691 return mXmppConnectionService.getIqGenerator();
2692 }
2693
2694 private class MyKeyManager implements X509KeyManager {
2695 @Override
2696 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
2697 return account.getPrivateKeyAlias();
2698 }
2699
2700 @Override
2701 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
2702 return null;
2703 }
2704
2705 @Override
2706 public X509Certificate[] getCertificateChain(String alias) {
2707 Log.d(Config.LOGTAG, "getting certificate chain");
2708 try {
2709 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
2710 } catch (final Exception e) {
2711 Log.d(Config.LOGTAG, "could not get certificate chain", e);
2712 return new X509Certificate[0];
2713 }
2714 }
2715
2716 @Override
2717 public String[] getClientAliases(String s, Principal[] principals) {
2718 final String alias = account.getPrivateKeyAlias();
2719 return alias != null ? new String[] {alias} : new String[0];
2720 }
2721
2722 @Override
2723 public String[] getServerAliases(String s, Principal[] principals) {
2724 return new String[0];
2725 }
2726
2727 @Override
2728 public PrivateKey getPrivateKey(String alias) {
2729 try {
2730 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
2731 } catch (Exception e) {
2732 return null;
2733 }
2734 }
2735 }
2736
2737 private static class LoginInfo {
2738 public final SaslMechanism saslMechanism;
2739 public final SaslMechanism.Version saslVersion;
2740 public final List<String> inlineBindFeatures;
2741
2742 private LoginInfo(
2743 final SaslMechanism saslMechanism,
2744 final SaslMechanism.Version saslVersion,
2745 final Collection<String> inlineBindFeatures) {
2746 Preconditions.checkNotNull(saslMechanism, "SASL Mechanism must not be null");
2747 Preconditions.checkNotNull(saslVersion, "SASL version must not be null");
2748 this.saslMechanism = saslMechanism;
2749 this.saslVersion = saslVersion;
2750 this.inlineBindFeatures =
2751 inlineBindFeatures == null
2752 ? Collections.emptyList()
2753 : ImmutableList.copyOf(inlineBindFeatures);
2754 }
2755
2756 public static SaslMechanism mechanism(final LoginInfo loginInfo) {
2757 return loginInfo == null ? null : loginInfo.saslMechanism;
2758 }
2759 }
2760
2761 private static class StreamId {
2762 public final String id;
2763 public final Resolver.Result location;
2764
2765 private StreamId(String id, Resolver.Result location) {
2766 this.id = id;
2767 this.location = location;
2768 }
2769
2770 @NonNull
2771 @Override
2772 public String toString() {
2773 return MoreObjects.toStringHelper(this)
2774 .add("id", id)
2775 .add("location", location)
2776 .toString();
2777 }
2778 }
2779
2780 private static class StateChangingError extends Error {
2781 private final Account.State state;
2782
2783 public StateChangingError(Account.State state) {
2784 this.state = state;
2785 }
2786 }
2787
2788 private static class StateChangingException extends IOException {
2789 private final Account.State state;
2790
2791 public StateChangingException(Account.State state) {
2792 this.state = state;
2793 }
2794 }
2795
2796 public class Features {
2797 XmppConnection connection;
2798 private boolean carbonsEnabled = false;
2799 private boolean encryptionEnabled = false;
2800 private boolean blockListRequested = false;
2801
2802 public Features(final XmppConnection connection) {
2803 this.connection = connection;
2804 }
2805
2806 private boolean hasDiscoFeature(final Jid server, final String feature) {
2807 synchronized (XmppConnection.this.disco) {
2808 final ServiceDiscoveryResult sdr = connection.disco.get(server);
2809 return sdr != null && sdr.getFeatures().contains(feature);
2810 }
2811 }
2812
2813 public boolean carbons() {
2814 return hasDiscoFeature(account.getDomain(), Namespace.CARBONS);
2815 }
2816
2817 public boolean commands() {
2818 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2819 }
2820
2821 public boolean easyOnboardingInvites() {
2822 synchronized (commands) {
2823 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2824 }
2825 }
2826
2827 public boolean bookmarksConversion() {
2828 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION)
2829 && pepPublishOptions();
2830 }
2831
2832 public boolean avatarConversion() {
2833 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION)
2834 && pepPublishOptions();
2835 }
2836
2837 public boolean blocking() {
2838 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2839 }
2840
2841 public boolean spamReporting() {
2842 return hasDiscoFeature(account.getDomain(), Namespace.REPORTING);
2843 }
2844
2845 public boolean flexibleOfflineMessageRetrieval() {
2846 return hasDiscoFeature(
2847 account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2848 }
2849
2850 public boolean register() {
2851 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2852 }
2853
2854 public boolean invite() {
2855 return connection.streamFeatures != null
2856 && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2857 }
2858
2859 public boolean sm() {
2860 return streamId != null
2861 || (connection.streamFeatures != null
2862 && connection.streamFeatures.hasChild(
2863 "sm", Namespace.STREAM_MANAGEMENT));
2864 }
2865
2866 public boolean csi() {
2867 return connection.streamFeatures != null
2868 && connection.streamFeatures.hasChild("csi", Namespace.CSI);
2869 }
2870
2871 public boolean pep() {
2872 synchronized (XmppConnection.this.disco) {
2873 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2874 return info != null && info.hasIdentity("pubsub", "pep");
2875 }
2876 }
2877
2878 public boolean pepPersistent() {
2879 synchronized (XmppConnection.this.disco) {
2880 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2881 return info != null
2882 && info.getFeatures()
2883 .contains("http://jabber.org/protocol/pubsub#persistent-items");
2884 }
2885 }
2886
2887 public boolean pepPublishOptions() {
2888 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2889 }
2890
2891 public boolean pepOmemoWhitelisted() {
2892 return hasDiscoFeature(
2893 account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2894 }
2895
2896 public boolean mam() {
2897 return MessageArchiveService.Version.has(getAccountFeatures());
2898 }
2899
2900 public List<String> getAccountFeatures() {
2901 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2902 return result == null ? Collections.emptyList() : result.getFeatures();
2903 }
2904
2905 public boolean push() {
2906 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2907 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2908 }
2909
2910 public boolean rosterVersioning() {
2911 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2912 }
2913
2914 public void setBlockListRequested(boolean value) {
2915 this.blockListRequested = value;
2916 }
2917
2918 public boolean httpUpload(long filesize) {
2919 if (Config.DISABLE_HTTP_UPLOAD) {
2920 return false;
2921 } else {
2922 for (String namespace :
2923 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2924 List<Entry<Jid, ServiceDiscoveryResult>> items =
2925 findDiscoItemsByFeature(namespace);
2926 if (items.size() > 0) {
2927 try {
2928 long maxsize =
2929 Long.parseLong(
2930 items.get(0)
2931 .getValue()
2932 .getExtendedDiscoInformation(
2933 namespace, "max-file-size"));
2934 if (filesize <= maxsize) {
2935 return true;
2936 } else {
2937 Log.d(
2938 Config.LOGTAG,
2939 account.getJid().asBareJid()
2940 + ": http upload is not available for files with size "
2941 + filesize
2942 + " (max is "
2943 + maxsize
2944 + ")");
2945 return false;
2946 }
2947 } catch (Exception e) {
2948 return true;
2949 }
2950 }
2951 }
2952 return false;
2953 }
2954 }
2955
2956 public boolean useLegacyHttpUpload() {
2957 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null
2958 && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2959 }
2960
2961 public long getMaxHttpUploadSize() {
2962 for (String namespace :
2963 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2964 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2965 if (items.size() > 0) {
2966 try {
2967 return Long.parseLong(
2968 items.get(0)
2969 .getValue()
2970 .getExtendedDiscoInformation(namespace, "max-file-size"));
2971 } catch (Exception e) {
2972 // ignored
2973 }
2974 }
2975 }
2976 return -1;
2977 }
2978
2979 public boolean stanzaIds() {
2980 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2981 }
2982
2983 public boolean bookmarks2() {
2984 return pepPublishOptions()
2985 && hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT);
2986 }
2987
2988 public boolean externalServiceDiscovery() {
2989 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2990 }
2991 }
2992}