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 && isSecure
1457 && loginInfo != null
1458 && streamId != null
1459 && !inSmacksSession) {
1460 if (Config.EXTENDED_SM_LOGGING) {
1461 Log.d(
1462 Config.LOGTAG,
1463 account.getJid().asBareJid()
1464 + ": resuming after stanza #"
1465 + stanzasReceived);
1466 }
1467 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1468 this.mSmCatchupMessageCounter.set(0);
1469 this.mWaitingForSmCatchup.set(true);
1470 this.tagWriter.writeStanzaAsync(resume);
1471 } else if (needsBinding) {
1472 if (this.streamFeatures.hasChild("bind", Namespace.BIND)
1473 && isSecure
1474 && loginInfo != null) {
1475 sendBindRequest();
1476 } else {
1477 Log.d(
1478 Config.LOGTAG,
1479 account.getJid().asBareJid()
1480 + ": unable to find bind feature "
1481 + XmlHelper.printElementNames(this.streamFeatures));
1482 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1483 }
1484 } else {
1485 Log.d(
1486 Config.LOGTAG,
1487 account.getJid().asBareJid()
1488 + ": received NOP stream features: "
1489 + XmlHelper.printElementNames(this.streamFeatures));
1490 }
1491 }
1492
1493 private void authenticate() throws IOException {
1494 final boolean isSecure = isSecure();
1495 if (isSecure && this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1496 authenticate(SaslMechanism.Version.SASL_2);
1497 } else if (isSecure && this.streamFeatures.hasChild("mechanisms", Namespace.SASL)) {
1498 authenticate(SaslMechanism.Version.SASL);
1499 } else {
1500 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1501 }
1502 }
1503
1504 private boolean isSecure() {
1505 return features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
1506 }
1507
1508 private void authenticate(final SaslMechanism.Version version) throws IOException {
1509 final Element authElement;
1510 if (version == SaslMechanism.Version.SASL) {
1511 authElement = this.streamFeatures.findChild("mechanisms", Namespace.SASL);
1512 } else {
1513 authElement = this.streamFeatures.findChild("authentication", Namespace.SASL_2);
1514 }
1515 final Collection<String> mechanisms = SaslMechanism.mechanisms(authElement);
1516 final Element cbElement =
1517 this.streamFeatures.findChild("sasl-channel-binding", Namespace.CHANNEL_BINDING);
1518 final Collection<ChannelBinding> channelBindings = ChannelBinding.of(cbElement);
1519 final SaslMechanism.Factory factory = new SaslMechanism.Factory(account);
1520 final SaslMechanism saslMechanism =
1521 factory.of(mechanisms, channelBindings, version, SSLSockets.version(this.socket));
1522 this.validate(saslMechanism, mechanisms);
1523 final boolean quickStartAvailable;
1524 final String firstMessage =
1525 saslMechanism.getClientFirstMessage(sslSocketOrNull(this.socket));
1526 final boolean usingFast = SaslMechanism.hashedToken(saslMechanism);
1527 final Element authenticate;
1528 if (version == SaslMechanism.Version.SASL) {
1529 authenticate = new Element("auth", Namespace.SASL);
1530 if (!Strings.isNullOrEmpty(firstMessage)) {
1531 authenticate.setContent(firstMessage);
1532 }
1533 quickStartAvailable = false;
1534 this.loginInfo = new LoginInfo(saslMechanism, version, Collections.emptyList());
1535 } else if (version == SaslMechanism.Version.SASL_2) {
1536 final Element inline = authElement.findChild("inline", Namespace.SASL_2);
1537 final boolean sm = inline != null && inline.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1538 final HashedToken.Mechanism hashTokenRequest;
1539 if (usingFast) {
1540 hashTokenRequest = null;
1541 } else {
1542 final Element fast =
1543 inline == null ? null : inline.findChild("fast", Namespace.FAST);
1544 final Collection<String> fastMechanisms = SaslMechanism.mechanisms(fast);
1545 hashTokenRequest =
1546 HashedToken.Mechanism.best(fastMechanisms, SSLSockets.version(this.socket));
1547 }
1548 final Collection<String> bindFeatures = Bind2.features(inline);
1549 quickStartAvailable =
1550 sm
1551 && bindFeatures != null
1552 && bindFeatures.containsAll(Bind2.QUICKSTART_FEATURES);
1553 if (bindFeatures != null) {
1554 try {
1555 mXmppConnectionService.restoredFromDatabaseLatch.await();
1556 } catch (final InterruptedException e) {
1557 Log.d(
1558 Config.LOGTAG,
1559 account.getJid().asBareJid()
1560 + ": interrupted while waiting for DB restore during SASL2 bind");
1561 return;
1562 }
1563 }
1564 this.loginInfo = new LoginInfo(saslMechanism, version, bindFeatures);
1565 this.hashTokenRequest = hashTokenRequest;
1566 authenticate =
1567 generateAuthenticationRequest(
1568 firstMessage, usingFast, hashTokenRequest, bindFeatures, sm);
1569 } else {
1570 throw new AssertionError("Missing implementation for " + version);
1571 }
1572
1573 if (account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, quickStartAvailable)) {
1574 mXmppConnectionService.databaseBackend.updateAccount(account);
1575 }
1576
1577 Log.d(
1578 Config.LOGTAG,
1579 account.getJid().toString()
1580 + ": Authenticating with "
1581 + version
1582 + "/"
1583 + LoginInfo.mechanism(this.loginInfo).getMechanism());
1584 authenticate.setAttribute("mechanism", LoginInfo.mechanism(this.loginInfo).getMechanism());
1585 synchronized (this.mStanzaQueue) {
1586 this.stanzasSentBeforeAuthentication = this.stanzasSent;
1587 tagWriter.writeElement(authenticate);
1588 }
1589 }
1590
1591 private static boolean isFastTokenAvailable(final Element authentication) {
1592 final Element inline = authentication == null ? null : authentication.findChild("inline");
1593 return inline != null && inline.hasChild("fast", Namespace.FAST);
1594 }
1595
1596 private void validate(
1597 final @Nullable SaslMechanism saslMechanism, Collection<String> mechanisms)
1598 throws StateChangingException {
1599 if (saslMechanism == null) {
1600 Log.d(
1601 Config.LOGTAG,
1602 account.getJid().asBareJid()
1603 + ": unable to find supported SASL mechanism in "
1604 + mechanisms);
1605 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1606 }
1607 if (SaslMechanism.hashedToken(saslMechanism)) {
1608 return;
1609 }
1610 final int pinnedMechanism = account.getPinnedMechanismPriority();
1611 if (pinnedMechanism > saslMechanism.getPriority()) {
1612 Log.e(
1613 Config.LOGTAG,
1614 "Auth failed. Authentication mechanism "
1615 + saslMechanism.getMechanism()
1616 + " has lower priority ("
1617 + saslMechanism.getPriority()
1618 + ") than pinned priority ("
1619 + pinnedMechanism
1620 + "). Possible downgrade attack?");
1621 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1622 }
1623 }
1624
1625 private Element generateAuthenticationRequest(
1626 final String firstMessage, final boolean usingFast) {
1627 return generateAuthenticationRequest(
1628 firstMessage, usingFast, null, Bind2.QUICKSTART_FEATURES, true);
1629 }
1630
1631 private Element generateAuthenticationRequest(
1632 final String firstMessage,
1633 final boolean usingFast,
1634 final HashedToken.Mechanism hashedTokenRequest,
1635 final Collection<String> bind,
1636 final boolean inlineStreamManagement) {
1637 final Element authenticate = new Element("authenticate", Namespace.SASL_2);
1638 if (!Strings.isNullOrEmpty(firstMessage)) {
1639 authenticate.addChild("initial-response").setContent(firstMessage);
1640 }
1641 final Element userAgent = authenticate.addChild("user-agent");
1642 userAgent.setAttribute("id", AccountUtils.publicDeviceId(account));
1643 userAgent
1644 .addChild("software")
1645 .setContent(mXmppConnectionService.getString(R.string.app_name));
1646 if (!PhoneHelper.isEmulator()) {
1647 userAgent
1648 .addChild("device")
1649 .setContent(String.format("%s %s", Build.MANUFACTURER, Build.MODEL));
1650 }
1651 // do not include bind if 'inlineStreamManagement' is missing and we have a streamId
1652 // (because we would rather just do a normal SM/resume)
1653 final boolean mayAttemptBind = streamId == null || inlineStreamManagement;
1654 if (bind != null && mayAttemptBind) {
1655 authenticate.addChild(generateBindRequest(bind));
1656 }
1657 if (inlineStreamManagement && streamId != null) {
1658 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1659 this.mSmCatchupMessageCounter.set(0);
1660 this.mWaitingForSmCatchup.set(true);
1661 authenticate.addChild(resume);
1662 }
1663 if (hashedTokenRequest != null) {
1664 authenticate
1665 .addChild("request-token", Namespace.FAST)
1666 .setAttribute("mechanism", hashedTokenRequest.name());
1667 }
1668 if (usingFast) {
1669 authenticate.addChild("fast", Namespace.FAST);
1670 }
1671 return authenticate;
1672 }
1673
1674 private Element generateBindRequest(final Collection<String> bindFeatures) {
1675 Log.d(Config.LOGTAG, "inline bind features: " + bindFeatures);
1676 final Element bind = new Element("bind", Namespace.BIND2);
1677 bind.addChild("tag").setContent(mXmppConnectionService.getString(R.string.app_name));
1678 if (bindFeatures.contains(Namespace.CARBONS)) {
1679 bind.addChild("enable", Namespace.CARBONS);
1680 }
1681 if (bindFeatures.contains(Namespace.STREAM_MANAGEMENT)) {
1682 bind.addChild(new EnablePacket());
1683 }
1684 return bind;
1685 }
1686
1687 private void register() {
1688 final String preAuth = account.getKey(Account.KEY_PRE_AUTH_REGISTRATION_TOKEN);
1689 if (preAuth != null && features.invite()) {
1690 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1691 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1692 sendUnmodifiedIqPacket(
1693 preAuthRequest,
1694 (account, response) -> {
1695 if (response.getType() == IqPacket.TYPE.RESULT) {
1696 sendRegistryRequest();
1697 } else {
1698 final String error = response.getErrorCondition();
1699 Log.d(
1700 Config.LOGTAG,
1701 account.getJid().asBareJid()
1702 + ": failed to pre auth. "
1703 + error);
1704 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1705 }
1706 },
1707 true);
1708 } else {
1709 sendRegistryRequest();
1710 }
1711 }
1712
1713 private void sendRegistryRequest() {
1714 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1715 register.query(Namespace.REGISTER);
1716 register.setTo(account.getDomain());
1717 sendUnmodifiedIqPacket(
1718 register,
1719 (account, packet) -> {
1720 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1721 return;
1722 }
1723 if (packet.getType() == IqPacket.TYPE.ERROR) {
1724 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1725 }
1726 final Element query = packet.query(Namespace.REGISTER);
1727 if (query.hasChild("username") && (query.hasChild("password"))) {
1728 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1729 final Element username =
1730 new Element("username").setContent(account.getUsername());
1731 final Element password =
1732 new Element("password").setContent(account.getPassword());
1733 register1.query(Namespace.REGISTER).addChild(username);
1734 register1.query().addChild(password);
1735 register1.setFrom(account.getJid().asBareJid());
1736 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1737 } else if (query.hasChild("x", Namespace.DATA)) {
1738 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1739 final Element blob = query.findChild("data", "urn:xmpp:bob");
1740 final String id = packet.getId();
1741 InputStream is;
1742 if (blob != null) {
1743 try {
1744 final String base64Blob = blob.getContent();
1745 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1746 is = new ByteArrayInputStream(strBlob);
1747 } catch (Exception e) {
1748 is = null;
1749 }
1750 } else {
1751 final boolean useTor =
1752 mXmppConnectionService.useTorToConnect() || account.isOnion();
1753 try {
1754 final String url = data.getValue("url");
1755 final String fallbackUrl = data.getValue("captcha-fallback-url");
1756 if (url != null) {
1757 is = HttpConnectionManager.open(url, useTor);
1758 } else if (fallbackUrl != null) {
1759 is = HttpConnectionManager.open(fallbackUrl, useTor);
1760 } else {
1761 is = null;
1762 }
1763 } catch (final IOException e) {
1764 Log.d(
1765 Config.LOGTAG,
1766 account.getJid().asBareJid() + ": unable to fetch captcha",
1767 e);
1768 is = null;
1769 }
1770 }
1771
1772 if (is != null) {
1773 Bitmap captcha = BitmapFactory.decodeStream(is);
1774 try {
1775 if (mXmppConnectionService.displayCaptchaRequest(
1776 account, id, data, captcha)) {
1777 return;
1778 }
1779 } catch (Exception e) {
1780 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1781 }
1782 }
1783 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1784 } else if (query.hasChild("instructions")
1785 || query.hasChild("x", Namespace.OOB)) {
1786 final String instructions = query.findChildContent("instructions");
1787 final Element oob = query.findChild("x", Namespace.OOB);
1788 final String url = oob == null ? null : oob.findChildContent("url");
1789 if (url != null) {
1790 setAccountCreationFailed(url);
1791 } else if (instructions != null) {
1792 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1793 if (matcher.find()) {
1794 setAccountCreationFailed(
1795 instructions.substring(matcher.start(), matcher.end()));
1796 }
1797 }
1798 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1799 }
1800 },
1801 true);
1802 }
1803
1804 private void setAccountCreationFailed(final String url) {
1805 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1806 if (httpUrl != null && httpUrl.isHttps()) {
1807 this.redirectionUrl = httpUrl;
1808 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1809 }
1810 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1811 }
1812
1813 public HttpUrl getRedirectionUrl() {
1814 return this.redirectionUrl;
1815 }
1816
1817 public void resetEverything() {
1818 resetAttemptCount(true);
1819 resetStreamId();
1820 clearIqCallbacks();
1821 this.stanzasSent = 0;
1822 mStanzaQueue.clear();
1823 this.redirectionUrl = null;
1824 synchronized (this.disco) {
1825 disco.clear();
1826 }
1827 synchronized (this.commands) {
1828 this.commands.clear();
1829 }
1830 this.loginInfo = null;
1831 }
1832
1833 private void sendBindRequest() {
1834 try {
1835 mXmppConnectionService.restoredFromDatabaseLatch.await();
1836 } catch (InterruptedException e) {
1837 Log.d(
1838 Config.LOGTAG,
1839 account.getJid().asBareJid()
1840 + ": interrupted while waiting for DB restore during bind");
1841 return;
1842 }
1843 clearIqCallbacks();
1844 if (account.getJid().isBareJid()) {
1845 account.setResource(this.createNewResource());
1846 } else {
1847 fixResource(mXmppConnectionService, account);
1848 }
1849 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1850 final String resource =
1851 Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1852 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1853 this.sendUnmodifiedIqPacket(
1854 iq,
1855 (account, packet) -> {
1856 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1857 return;
1858 }
1859 final Element bind = packet.findChild("bind");
1860 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1861 isBound = true;
1862 final Element jid = bind.findChild("jid");
1863 if (jid != null && jid.getContent() != null) {
1864 try {
1865 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1866 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1867 Log.d(
1868 Config.LOGTAG,
1869 account.getJid().asBareJid()
1870 + ": server tried to re-assign domain to "
1871 + assignedJid.getDomain());
1872 throw new StateChangingError(Account.State.BIND_FAILURE);
1873 }
1874 if (account.setJid(assignedJid)) {
1875 Log.d(
1876 Config.LOGTAG,
1877 account.getJid().asBareJid()
1878 + ": jid changed during bind. updating database");
1879 mXmppConnectionService.databaseBackend.updateAccount(account);
1880 }
1881 if (streamFeatures.hasChild("session")
1882 && !streamFeatures
1883 .findChild("session")
1884 .hasChild("optional")) {
1885 sendStartSession();
1886 } else {
1887 final boolean waitForDisco = enableStreamManagement();
1888 sendPostBindInitialization(waitForDisco, false);
1889 }
1890 return;
1891 } catch (final IllegalArgumentException e) {
1892 Log.d(
1893 Config.LOGTAG,
1894 account.getJid().asBareJid()
1895 + ": server reported invalid jid ("
1896 + jid.getContent()
1897 + ") on bind");
1898 }
1899 } else {
1900 Log.d(
1901 Config.LOGTAG,
1902 account.getJid()
1903 + ": disconnecting because of bind failure. (no jid)");
1904 }
1905 } else {
1906 Log.d(
1907 Config.LOGTAG,
1908 account.getJid()
1909 + ": disconnecting because of bind failure ("
1910 + packet);
1911 }
1912 final Element error = packet.findChild("error");
1913 if (packet.getType() == IqPacket.TYPE.ERROR
1914 && error != null
1915 && error.hasChild("conflict")) {
1916 account.setResource(createNewResource());
1917 }
1918 throw new StateChangingError(Account.State.BIND_FAILURE);
1919 },
1920 true);
1921 }
1922
1923 private void clearIqCallbacks() {
1924 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1925 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1926 synchronized (this.packetCallbacks) {
1927 if (this.packetCallbacks.size() == 0) {
1928 return;
1929 }
1930 Log.d(
1931 Config.LOGTAG,
1932 account.getJid().asBareJid()
1933 + ": clearing "
1934 + this.packetCallbacks.size()
1935 + " iq callbacks");
1936 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator =
1937 this.packetCallbacks.values().iterator();
1938 while (iterator.hasNext()) {
1939 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1940 callbacks.add(entry.second);
1941 iterator.remove();
1942 }
1943 }
1944 for (OnIqPacketReceived callback : callbacks) {
1945 try {
1946 callback.onIqPacketReceived(account, failurePacket);
1947 } catch (StateChangingError error) {
1948 Log.d(
1949 Config.LOGTAG,
1950 account.getJid().asBareJid()
1951 + ": caught StateChangingError("
1952 + error.state.toString()
1953 + ") while clearing callbacks");
1954 // ignore
1955 }
1956 }
1957 Log.d(
1958 Config.LOGTAG,
1959 account.getJid().asBareJid()
1960 + ": done clearing iq callbacks. "
1961 + this.packetCallbacks.size()
1962 + " left");
1963 }
1964
1965 public void sendDiscoTimeout() {
1966 if (mWaitForDisco.compareAndSet(true, false)) {
1967 Log.d(
1968 Config.LOGTAG,
1969 account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1970 finalizeBind();
1971 }
1972 }
1973
1974 private void sendStartSession() {
1975 Log.d(
1976 Config.LOGTAG,
1977 account.getJid().asBareJid() + ": sending legacy session to outdated server");
1978 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1979 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1980 this.sendUnmodifiedIqPacket(
1981 startSession,
1982 (account, packet) -> {
1983 if (packet.getType() == IqPacket.TYPE.RESULT) {
1984 final boolean waitForDisco = enableStreamManagement();
1985 sendPostBindInitialization(waitForDisco, false);
1986 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1987 throw new StateChangingError(Account.State.SESSION_FAILURE);
1988 }
1989 },
1990 true);
1991 }
1992
1993 private boolean enableStreamManagement() {
1994 final boolean streamManagement =
1995 this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1996 if (streamManagement) {
1997 synchronized (this.mStanzaQueue) {
1998 final EnablePacket enable = new EnablePacket();
1999 tagWriter.writeStanzaAsync(enable);
2000 stanzasSent = 0;
2001 mStanzaQueue.clear();
2002 }
2003 return true;
2004 } else {
2005 return false;
2006 }
2007 }
2008
2009 private void sendPostBindInitialization(
2010 final boolean waitForDisco, final boolean carbonsEnabled) {
2011 features.carbonsEnabled = carbonsEnabled;
2012 features.blockListRequested = false;
2013 synchronized (this.disco) {
2014 this.disco.clear();
2015 }
2016 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
2017 mPendingServiceDiscoveries.set(0);
2018 mWaitForDisco.set(waitForDisco);
2019 lastDiscoStarted = SystemClock.elapsedRealtime();
2020 mXmppConnectionService.scheduleWakeUpCall(
2021 Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
2022 final Element caps = streamFeatures.findChild("c");
2023 final String hash = caps == null ? null : caps.getAttribute("hash");
2024 final String ver = caps == null ? null : caps.getAttribute("ver");
2025 ServiceDiscoveryResult discoveryResult = null;
2026 if (hash != null && ver != null) {
2027 discoveryResult =
2028 mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
2029 }
2030 final boolean requestDiscoItemsFirst =
2031 !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
2032 if (requestDiscoItemsFirst) {
2033 sendServiceDiscoveryItems(account.getDomain());
2034 }
2035 if (discoveryResult == null) {
2036 sendServiceDiscoveryInfo(account.getDomain());
2037 } else {
2038 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
2039 disco.put(account.getDomain(), discoveryResult);
2040 }
2041 discoverMamPreferences();
2042 sendServiceDiscoveryInfo(account.getJid().asBareJid());
2043 if (!requestDiscoItemsFirst) {
2044 sendServiceDiscoveryItems(account.getDomain());
2045 }
2046
2047 if (!mWaitForDisco.get()) {
2048 finalizeBind();
2049 }
2050 this.lastSessionStarted = SystemClock.elapsedRealtime();
2051 }
2052
2053 private void sendServiceDiscoveryInfo(final Jid jid) {
2054 mPendingServiceDiscoveries.incrementAndGet();
2055 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2056 iq.setTo(jid);
2057 iq.query("http://jabber.org/protocol/disco#info");
2058 this.sendIqPacket(
2059 iq,
2060 (account, packet) -> {
2061 if (packet.getType() == IqPacket.TYPE.RESULT) {
2062 boolean advancedStreamFeaturesLoaded;
2063 synchronized (XmppConnection.this.disco) {
2064 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
2065 if (jid.equals(account.getDomain())) {
2066 mXmppConnectionService.databaseBackend.insertDiscoveryResult(
2067 result);
2068 }
2069 disco.put(jid, result);
2070 advancedStreamFeaturesLoaded =
2071 disco.containsKey(account.getDomain())
2072 && disco.containsKey(account.getJid().asBareJid());
2073 }
2074 if (advancedStreamFeaturesLoaded
2075 && (jid.equals(account.getDomain())
2076 || jid.equals(account.getJid().asBareJid()))) {
2077 enableAdvancedStreamFeatures();
2078 }
2079 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
2080 Log.d(
2081 Config.LOGTAG,
2082 account.getJid().asBareJid()
2083 + ": could not query disco info for "
2084 + jid.toString());
2085 final boolean serverOrAccount =
2086 jid.equals(account.getDomain())
2087 || jid.equals(account.getJid().asBareJid());
2088 final boolean advancedStreamFeaturesLoaded;
2089 if (serverOrAccount) {
2090 synchronized (XmppConnection.this.disco) {
2091 disco.put(jid, ServiceDiscoveryResult.empty());
2092 advancedStreamFeaturesLoaded =
2093 disco.containsKey(account.getDomain())
2094 && disco.containsKey(account.getJid().asBareJid());
2095 }
2096 } else {
2097 advancedStreamFeaturesLoaded = false;
2098 }
2099 if (advancedStreamFeaturesLoaded) {
2100 enableAdvancedStreamFeatures();
2101 }
2102 }
2103 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2104 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2105 && mWaitForDisco.compareAndSet(true, false)) {
2106 finalizeBind();
2107 }
2108 }
2109 });
2110 }
2111
2112 private void discoverMamPreferences() {
2113 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2114 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
2115 sendIqPacket(
2116 request,
2117 (account, response) -> {
2118 if (response.getType() == IqPacket.TYPE.RESULT) {
2119 Element prefs =
2120 response.findChild(
2121 "prefs", MessageArchiveService.Version.MAM_2.namespace);
2122 isMamPreferenceAlways =
2123 "always"
2124 .equals(
2125 prefs == null
2126 ? null
2127 : prefs.getAttribute("default"));
2128 }
2129 });
2130 }
2131
2132 private void discoverCommands() {
2133 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2134 request.setTo(account.getDomain());
2135 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
2136 sendIqPacket(
2137 request,
2138 (account, response) -> {
2139 if (response.getType() == IqPacket.TYPE.RESULT) {
2140 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
2141 if (query == null) {
2142 return;
2143 }
2144 final HashMap<String, Jid> commands = new HashMap<>();
2145 for (final Element child : query.getChildren()) {
2146 if ("item".equals(child.getName())) {
2147 final String node = child.getAttribute("node");
2148 final Jid jid = child.getAttributeAsJid("jid");
2149 if (node != null && jid != null) {
2150 commands.put(node, jid);
2151 }
2152 }
2153 }
2154 synchronized (this.commands) {
2155 this.commands.clear();
2156 this.commands.putAll(commands);
2157 }
2158 }
2159 });
2160 }
2161
2162 public boolean isMamPreferenceAlways() {
2163 return isMamPreferenceAlways;
2164 }
2165
2166 private void finalizeBind() {
2167 if (bindListener != null) {
2168 bindListener.onBind(account);
2169 }
2170 changeStatusToOnline();
2171 }
2172
2173 private void enableAdvancedStreamFeatures() {
2174 if (getFeatures().blocking() && !features.blockListRequested) {
2175 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
2176 this.sendIqPacket(
2177 getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
2178 }
2179 for (final OnAdvancedStreamFeaturesLoaded listener :
2180 advancedStreamFeaturesLoadedListeners) {
2181 listener.onAdvancedStreamFeaturesAvailable(account);
2182 }
2183 if (getFeatures().carbons() && !features.carbonsEnabled) {
2184 sendEnableCarbons();
2185 }
2186 if (getFeatures().commands()) {
2187 discoverCommands();
2188 }
2189 }
2190
2191 private void sendServiceDiscoveryItems(final Jid server) {
2192 mPendingServiceDiscoveries.incrementAndGet();
2193 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2194 iq.setTo(server.getDomain());
2195 iq.query("http://jabber.org/protocol/disco#items");
2196 this.sendIqPacket(
2197 iq,
2198 (account, packet) -> {
2199 if (packet.getType() == IqPacket.TYPE.RESULT) {
2200 final HashSet<Jid> items = new HashSet<>();
2201 final List<Element> elements = packet.query().getChildren();
2202 for (final Element element : elements) {
2203 if (element.getName().equals("item")) {
2204 final Jid jid =
2205 InvalidJid.getNullForInvalid(
2206 element.getAttributeAsJid("jid"));
2207 if (jid != null && !jid.equals(account.getDomain())) {
2208 items.add(jid);
2209 }
2210 }
2211 }
2212 for (Jid jid : items) {
2213 sendServiceDiscoveryInfo(jid);
2214 }
2215 } else {
2216 Log.d(
2217 Config.LOGTAG,
2218 account.getJid().asBareJid()
2219 + ": could not query disco items of "
2220 + server);
2221 }
2222 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2223 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2224 && mWaitForDisco.compareAndSet(true, false)) {
2225 finalizeBind();
2226 }
2227 }
2228 });
2229 }
2230
2231 private void sendEnableCarbons() {
2232 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
2233 iq.addChild("enable", Namespace.CARBONS);
2234 this.sendIqPacket(
2235 iq,
2236 (account, packet) -> {
2237 if (packet.getType() == IqPacket.TYPE.RESULT) {
2238 Log.d(
2239 Config.LOGTAG,
2240 account.getJid().asBareJid() + ": successfully enabled carbons");
2241 features.carbonsEnabled = true;
2242 } else {
2243 Log.d(
2244 Config.LOGTAG,
2245 account.getJid().asBareJid()
2246 + ": could not enable carbons "
2247 + packet);
2248 }
2249 });
2250 }
2251
2252 private void processStreamError(final Tag currentTag) throws IOException {
2253 final Element streamError = tagReader.readElement(currentTag);
2254 if (streamError == null) {
2255 return;
2256 }
2257 if (streamError.hasChild("conflict")) {
2258 account.setResource(createNewResource());
2259 Log.d(
2260 Config.LOGTAG,
2261 account.getJid().asBareJid()
2262 + ": switching resource due to conflict ("
2263 + account.getResource()
2264 + ")");
2265 throw new IOException();
2266 } else if (streamError.hasChild("host-unknown")) {
2267 throw new StateChangingException(Account.State.HOST_UNKNOWN);
2268 } else if (streamError.hasChild("policy-violation")) {
2269 this.lastConnect = SystemClock.elapsedRealtime();
2270 final String text = streamError.findChildContent("text");
2271 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
2272 failPendingMessages(text);
2273 throw new StateChangingException(Account.State.POLICY_VIOLATION);
2274 } else if (streamError.hasChild("see-other-host")) {
2275 final String seeOtherHost = streamError.findChildContent("see-other-host");
2276 final Resolver.Result currentResolverResult = this.currentResolverResult;
2277 if (Strings.isNullOrEmpty(seeOtherHost) || currentResolverResult == null) {
2278 Log.d(
2279 Config.LOGTAG,
2280 account.getJid().asBareJid() + ": stream error " + streamError);
2281 throw new StateChangingException(Account.State.STREAM_ERROR);
2282 }
2283 Log.d(
2284 Config.LOGTAG,
2285 account.getJid().asBareJid()
2286 + ": see other host: "
2287 + seeOtherHost
2288 + " "
2289 + currentResolverResult);
2290 final Resolver.Result seeOtherResult = currentResolverResult.seeOtherHost(seeOtherHost);
2291 if (seeOtherResult != null) {
2292 this.seeOtherHostResolverResult = seeOtherResult;
2293 throw new StateChangingException(Account.State.SEE_OTHER_HOST);
2294 } else {
2295 throw new StateChangingException(Account.State.STREAM_ERROR);
2296 }
2297 } else {
2298 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
2299 throw new StateChangingException(Account.State.STREAM_ERROR);
2300 }
2301 }
2302
2303 private void failPendingMessages(final String error) {
2304 synchronized (this.mStanzaQueue) {
2305 for (int i = 0; i < mStanzaQueue.size(); ++i) {
2306 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
2307 if (stanza instanceof MessagePacket) {
2308 final MessagePacket packet = (MessagePacket) stanza;
2309 final String id = packet.getId();
2310 final Jid to = packet.getTo();
2311 mXmppConnectionService.markMessage(
2312 account, to.asBareJid(), id, Message.STATUS_SEND_FAILED, error);
2313 }
2314 }
2315 }
2316 }
2317
2318 private boolean establishStream(final SSLSockets.Version sslVersion)
2319 throws IOException, InterruptedException {
2320 final boolean secureConnection = sslVersion != SSLSockets.Version.NONE;
2321 final SaslMechanism quickStartMechanism;
2322 if (secureConnection) {
2323 quickStartMechanism =
2324 SaslMechanism.ensureAvailable(account.getQuickStartMechanism(), sslVersion);
2325 } else {
2326 quickStartMechanism = null;
2327 }
2328 if (secureConnection
2329 && Config.QUICKSTART_ENABLED
2330 && quickStartMechanism != null
2331 && account.isOptionSet(Account.OPTION_QUICKSTART_AVAILABLE)) {
2332 mXmppConnectionService.restoredFromDatabaseLatch.await();
2333 this.loginInfo =
2334 new LoginInfo(
2335 quickStartMechanism,
2336 SaslMechanism.Version.SASL_2,
2337 Bind2.QUICKSTART_FEATURES);
2338 final boolean usingFast = quickStartMechanism instanceof HashedToken;
2339 final Element authenticate =
2340 generateAuthenticationRequest(
2341 quickStartMechanism.getClientFirstMessage(sslSocketOrNull(this.socket)),
2342 usingFast);
2343 authenticate.setAttribute("mechanism", quickStartMechanism.getMechanism());
2344 sendStartStream(true, false);
2345 synchronized (this.mStanzaQueue) {
2346 this.stanzasSentBeforeAuthentication = this.stanzasSent;
2347 tagWriter.writeElement(authenticate);
2348 }
2349 Log.d(
2350 Config.LOGTAG,
2351 account.getJid().toString()
2352 + ": quick start with "
2353 + quickStartMechanism.getMechanism());
2354 return true;
2355 } else {
2356 sendStartStream(secureConnection, true);
2357 return false;
2358 }
2359 }
2360
2361 private void sendStartStream(final boolean from, final boolean flush) throws IOException {
2362 final Tag stream = Tag.start("stream:stream");
2363 stream.setAttribute("to", account.getServer());
2364 if (from) {
2365 stream.setAttribute("from", account.getJid().asBareJid().toEscapedString());
2366 }
2367 stream.setAttribute("version", "1.0");
2368 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
2369 stream.setAttribute("xmlns", Namespace.JABBER_CLIENT);
2370 stream.setAttribute("xmlns:stream", Namespace.STREAMS);
2371 tagWriter.writeTag(stream, flush);
2372 }
2373
2374 private String createNewResource() {
2375 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
2376 }
2377
2378 private String nextRandomId() {
2379 return nextRandomId(false);
2380 }
2381
2382 private String nextRandomId(final boolean s) {
2383 return CryptoHelper.random(s ? 3 : 9);
2384 }
2385
2386 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
2387 packet.setFrom(account.getJid());
2388 return this.sendUnmodifiedIqPacket(packet, callback, false);
2389 }
2390
2391 public synchronized String sendUnmodifiedIqPacket(
2392 final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
2393 if (packet.getId() == null) {
2394 packet.setAttribute("id", nextRandomId());
2395 }
2396 if (callback != null) {
2397 synchronized (this.packetCallbacks) {
2398 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
2399 }
2400 }
2401 this.sendPacket(packet, force);
2402 return packet.getId();
2403 }
2404
2405 public void sendMessagePacket(final MessagePacket packet) {
2406 this.sendPacket(packet);
2407 }
2408
2409 public void sendPresencePacket(final PresencePacket packet) {
2410 this.sendPacket(packet);
2411 }
2412
2413 private synchronized void sendPacket(final AbstractStanza packet) {
2414 sendPacket(packet, false);
2415 }
2416
2417 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
2418 if (stanzasSent == Integer.MAX_VALUE) {
2419 resetStreamId();
2420 disconnect(true);
2421 return;
2422 }
2423 synchronized (this.mStanzaQueue) {
2424 if (force || isBound) {
2425 tagWriter.writeStanzaAsync(packet);
2426 } else {
2427 Log.d(
2428 Config.LOGTAG,
2429 account.getJid().asBareJid()
2430 + " do not write stanza to unbound stream "
2431 + packet.toString());
2432 }
2433 if (packet instanceof AbstractAcknowledgeableStanza) {
2434 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
2435
2436 if (this.mStanzaQueue.size() != 0) {
2437 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
2438 if (currentHighestKey != stanzasSent) {
2439 throw new AssertionError("Stanza count messed up");
2440 }
2441 }
2442
2443 ++stanzasSent;
2444 if (Config.EXTENDED_SM_LOGGING) {
2445 Log.d(
2446 Config.LOGTAG,
2447 account.getJid().asBareJid()
2448 + ": counting outbound "
2449 + packet.getName()
2450 + " as #"
2451 + stanzasSent);
2452 }
2453 this.mStanzaQueue.append(stanzasSent, stanza);
2454 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
2455 if (Config.EXTENDED_SM_LOGGING) {
2456 Log.d(
2457 Config.LOGTAG,
2458 account.getJid().asBareJid()
2459 + ": requesting ack for message stanza #"
2460 + stanzasSent);
2461 }
2462 tagWriter.writeStanzaAsync(new RequestPacket());
2463 }
2464 }
2465 }
2466 }
2467
2468 public void sendPing() {
2469 if (!r()) {
2470 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2471 iq.setFrom(account.getJid());
2472 iq.addChild("ping", Namespace.PING);
2473 this.sendIqPacket(iq, null);
2474 }
2475 this.lastPingSent = SystemClock.elapsedRealtime();
2476 }
2477
2478 public void setOnMessagePacketReceivedListener(final OnMessagePacketReceived listener) {
2479 this.messageListener = listener;
2480 }
2481
2482 public void setOnUnregisteredIqPacketReceivedListener(final OnIqPacketReceived listener) {
2483 this.unregisteredIqListener = listener;
2484 }
2485
2486 public void setOnPresencePacketReceivedListener(final OnPresencePacketReceived listener) {
2487 this.presenceListener = listener;
2488 }
2489
2490 public void setOnJinglePacketReceivedListener(final OnJinglePacketReceived listener) {
2491 this.jingleListener = listener;
2492 }
2493
2494 public void setOnStatusChangedListener(final OnStatusChanged listener) {
2495 this.statusListener = listener;
2496 }
2497
2498 public void setOnBindListener(final OnBindListener listener) {
2499 this.bindListener = listener;
2500 }
2501
2502 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
2503 this.acknowledgedListener = listener;
2504 }
2505
2506 public void addOnAdvancedStreamFeaturesAvailableListener(
2507 final OnAdvancedStreamFeaturesLoaded listener) {
2508 this.advancedStreamFeaturesLoadedListeners.add(listener);
2509 }
2510
2511 private void forceCloseSocket() {
2512 FileBackend.close(this.socket);
2513 FileBackend.close(this.tagReader);
2514 }
2515
2516 public void interrupt() {
2517 if (this.mThread != null) {
2518 this.mThread.interrupt();
2519 }
2520 }
2521
2522 public void disconnect(final boolean force) {
2523 interrupt();
2524 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
2525 if (force) {
2526 forceCloseSocket();
2527 } else {
2528 final TagWriter currentTagWriter = this.tagWriter;
2529 if (currentTagWriter.isActive()) {
2530 currentTagWriter.finish();
2531 final Socket currentSocket = this.socket;
2532 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
2533 try {
2534 currentTagWriter.await(1, TimeUnit.SECONDS);
2535 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
2536 currentTagWriter.writeTag(Tag.end("stream:stream"));
2537 if (streamCountDownLatch != null) {
2538 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
2539 Log.d(
2540 Config.LOGTAG,
2541 account.getJid().asBareJid() + ": remote ended stream");
2542 } else {
2543 Log.d(
2544 Config.LOGTAG,
2545 account.getJid().asBareJid()
2546 + ": remote has not closed socket. force closing");
2547 }
2548 }
2549 } catch (InterruptedException e) {
2550 Log.d(
2551 Config.LOGTAG,
2552 account.getJid().asBareJid()
2553 + ": interrupted while gracefully closing stream");
2554 } catch (final IOException e) {
2555 Log.d(
2556 Config.LOGTAG,
2557 account.getJid().asBareJid()
2558 + ": io exception during disconnect ("
2559 + e.getMessage()
2560 + ")");
2561 } finally {
2562 FileBackend.close(currentSocket);
2563 }
2564 } else {
2565 forceCloseSocket();
2566 }
2567 }
2568 }
2569
2570 private void resetStreamId() {
2571 this.streamId = null;
2572 this.boundStreamFeatures = null;
2573 }
2574
2575 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
2576 synchronized (this.disco) {
2577 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
2578 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
2579 if (cursor.getValue().getFeatures().contains(feature)) {
2580 items.add(cursor);
2581 }
2582 }
2583 return items;
2584 }
2585 }
2586
2587 public Jid findDiscoItemByFeature(final String feature) {
2588 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
2589 if (items.size() >= 1) {
2590 return items.get(0).getKey();
2591 }
2592 return null;
2593 }
2594
2595 public boolean r() {
2596 if (getFeatures().sm()) {
2597 this.tagWriter.writeStanzaAsync(new RequestPacket());
2598 return true;
2599 } else {
2600 return false;
2601 }
2602 }
2603
2604 public List<String> getMucServersWithholdAccount() {
2605 final List<String> servers = getMucServers();
2606 servers.remove(account.getDomain().toEscapedString());
2607 return servers;
2608 }
2609
2610 public List<String> getMucServers() {
2611 List<String> servers = new ArrayList<>();
2612 synchronized (this.disco) {
2613 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
2614 final ServiceDiscoveryResult value = cursor.getValue();
2615 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
2616 && value.hasIdentity("conference", "text")
2617 && !value.getFeatures().contains("jabber:iq:gateway")
2618 && !value.hasIdentity("conference", "irc")) {
2619 servers.add(cursor.getKey().toString());
2620 }
2621 }
2622 }
2623 return servers;
2624 }
2625
2626 public String getMucServer() {
2627 List<String> servers = getMucServers();
2628 return servers.size() > 0 ? servers.get(0) : null;
2629 }
2630
2631 public int getTimeToNextAttempt(final boolean aggressive) {
2632 final int interval;
2633 if (aggressive) {
2634 interval = Math.min((int) (3 * Math.pow(1.3, attempt)), 60);
2635 } else {
2636 final int additionalTime =
2637 account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
2638 interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
2639 }
2640 final int secondsSinceLast =
2641 (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
2642 return interval - secondsSinceLast;
2643 }
2644
2645 public int getAttempt() {
2646 return this.attempt;
2647 }
2648
2649 public Features getFeatures() {
2650 return this.features;
2651 }
2652
2653 public long getLastSessionEstablished() {
2654 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
2655 return System.currentTimeMillis() - diff;
2656 }
2657
2658 public long getLastConnect() {
2659 return this.lastConnect;
2660 }
2661
2662 public long getLastPingSent() {
2663 return this.lastPingSent;
2664 }
2665
2666 public long getLastDiscoStarted() {
2667 return this.lastDiscoStarted;
2668 }
2669
2670 public long getLastPacketReceived() {
2671 return this.lastPacketReceived;
2672 }
2673
2674 public void sendActive() {
2675 this.sendPacket(new ActivePacket());
2676 }
2677
2678 public void sendInactive() {
2679 this.sendPacket(new InactivePacket());
2680 }
2681
2682 public void resetAttemptCount(boolean resetConnectTime) {
2683 this.attempt = 0;
2684 if (resetConnectTime) {
2685 this.lastConnect = 0;
2686 }
2687 }
2688
2689 public void setInteractive(boolean interactive) {
2690 this.mInteractive = interactive;
2691 }
2692
2693 private IqGenerator getIqGenerator() {
2694 return mXmppConnectionService.getIqGenerator();
2695 }
2696
2697 private class MyKeyManager implements X509KeyManager {
2698 @Override
2699 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
2700 return account.getPrivateKeyAlias();
2701 }
2702
2703 @Override
2704 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
2705 return null;
2706 }
2707
2708 @Override
2709 public X509Certificate[] getCertificateChain(String alias) {
2710 Log.d(Config.LOGTAG, "getting certificate chain");
2711 try {
2712 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
2713 } catch (final Exception e) {
2714 Log.d(Config.LOGTAG, "could not get certificate chain", e);
2715 return new X509Certificate[0];
2716 }
2717 }
2718
2719 @Override
2720 public String[] getClientAliases(String s, Principal[] principals) {
2721 final String alias = account.getPrivateKeyAlias();
2722 return alias != null ? new String[] {alias} : new String[0];
2723 }
2724
2725 @Override
2726 public String[] getServerAliases(String s, Principal[] principals) {
2727 return new String[0];
2728 }
2729
2730 @Override
2731 public PrivateKey getPrivateKey(String alias) {
2732 try {
2733 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
2734 } catch (Exception e) {
2735 return null;
2736 }
2737 }
2738 }
2739
2740 private static class LoginInfo {
2741 public final SaslMechanism saslMechanism;
2742 public final SaslMechanism.Version saslVersion;
2743 public final List<String> inlineBindFeatures;
2744
2745 private LoginInfo(
2746 final SaslMechanism saslMechanism,
2747 final SaslMechanism.Version saslVersion,
2748 final Collection<String> inlineBindFeatures) {
2749 Preconditions.checkNotNull(saslMechanism, "SASL Mechanism must not be null");
2750 Preconditions.checkNotNull(saslVersion, "SASL version must not be null");
2751 this.saslMechanism = saslMechanism;
2752 this.saslVersion = saslVersion;
2753 this.inlineBindFeatures =
2754 inlineBindFeatures == null
2755 ? Collections.emptyList()
2756 : ImmutableList.copyOf(inlineBindFeatures);
2757 }
2758
2759 public static SaslMechanism mechanism(final LoginInfo loginInfo) {
2760 return loginInfo == null ? null : loginInfo.saslMechanism;
2761 }
2762 }
2763
2764 private static class StreamId {
2765 public final String id;
2766 public final Resolver.Result location;
2767
2768 private StreamId(String id, Resolver.Result location) {
2769 this.id = id;
2770 this.location = location;
2771 }
2772
2773 @NonNull
2774 @Override
2775 public String toString() {
2776 return MoreObjects.toStringHelper(this)
2777 .add("id", id)
2778 .add("location", location)
2779 .toString();
2780 }
2781 }
2782
2783 private static class StateChangingError extends Error {
2784 private final Account.State state;
2785
2786 public StateChangingError(Account.State state) {
2787 this.state = state;
2788 }
2789 }
2790
2791 private static class StateChangingException extends IOException {
2792 private final Account.State state;
2793
2794 public StateChangingException(Account.State state) {
2795 this.state = state;
2796 }
2797 }
2798
2799 public class Features {
2800 XmppConnection connection;
2801 private boolean carbonsEnabled = false;
2802 private boolean encryptionEnabled = false;
2803 private boolean blockListRequested = false;
2804
2805 public Features(final XmppConnection connection) {
2806 this.connection = connection;
2807 }
2808
2809 private boolean hasDiscoFeature(final Jid server, final String feature) {
2810 synchronized (XmppConnection.this.disco) {
2811 final ServiceDiscoveryResult sdr = connection.disco.get(server);
2812 return sdr != null && sdr.getFeatures().contains(feature);
2813 }
2814 }
2815
2816 public boolean carbons() {
2817 return hasDiscoFeature(account.getDomain(), Namespace.CARBONS);
2818 }
2819
2820 public boolean commands() {
2821 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2822 }
2823
2824 public boolean easyOnboardingInvites() {
2825 synchronized (commands) {
2826 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2827 }
2828 }
2829
2830 public boolean bookmarksConversion() {
2831 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION)
2832 && pepPublishOptions();
2833 }
2834
2835 public boolean avatarConversion() {
2836 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION)
2837 && pepPublishOptions();
2838 }
2839
2840 public boolean blocking() {
2841 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2842 }
2843
2844 public boolean spamReporting() {
2845 return hasDiscoFeature(account.getDomain(), Namespace.REPORTING);
2846 }
2847
2848 public boolean flexibleOfflineMessageRetrieval() {
2849 return hasDiscoFeature(
2850 account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2851 }
2852
2853 public boolean register() {
2854 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2855 }
2856
2857 public boolean invite() {
2858 return connection.streamFeatures != null
2859 && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2860 }
2861
2862 public boolean sm() {
2863 return streamId != null
2864 || (connection.streamFeatures != null
2865 && connection.streamFeatures.hasChild(
2866 "sm", Namespace.STREAM_MANAGEMENT));
2867 }
2868
2869 public boolean csi() {
2870 return connection.streamFeatures != null
2871 && connection.streamFeatures.hasChild("csi", Namespace.CSI);
2872 }
2873
2874 public boolean pep() {
2875 synchronized (XmppConnection.this.disco) {
2876 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2877 return info != null && info.hasIdentity("pubsub", "pep");
2878 }
2879 }
2880
2881 public boolean pepPersistent() {
2882 synchronized (XmppConnection.this.disco) {
2883 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2884 return info != null
2885 && info.getFeatures()
2886 .contains("http://jabber.org/protocol/pubsub#persistent-items");
2887 }
2888 }
2889
2890 public boolean pepPublishOptions() {
2891 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2892 }
2893
2894 public boolean pepOmemoWhitelisted() {
2895 return hasDiscoFeature(
2896 account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2897 }
2898
2899 public boolean mam() {
2900 return MessageArchiveService.Version.has(getAccountFeatures());
2901 }
2902
2903 public List<String> getAccountFeatures() {
2904 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2905 return result == null ? Collections.emptyList() : result.getFeatures();
2906 }
2907
2908 public boolean push() {
2909 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2910 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2911 }
2912
2913 public boolean rosterVersioning() {
2914 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2915 }
2916
2917 public void setBlockListRequested(boolean value) {
2918 this.blockListRequested = value;
2919 }
2920
2921 public boolean httpUpload(long filesize) {
2922 if (Config.DISABLE_HTTP_UPLOAD) {
2923 return false;
2924 } else {
2925 for (String namespace :
2926 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2927 List<Entry<Jid, ServiceDiscoveryResult>> items =
2928 findDiscoItemsByFeature(namespace);
2929 if (items.size() > 0) {
2930 try {
2931 long maxsize =
2932 Long.parseLong(
2933 items.get(0)
2934 .getValue()
2935 .getExtendedDiscoInformation(
2936 namespace, "max-file-size"));
2937 if (filesize <= maxsize) {
2938 return true;
2939 } else {
2940 Log.d(
2941 Config.LOGTAG,
2942 account.getJid().asBareJid()
2943 + ": http upload is not available for files with size "
2944 + filesize
2945 + " (max is "
2946 + maxsize
2947 + ")");
2948 return false;
2949 }
2950 } catch (Exception e) {
2951 return true;
2952 }
2953 }
2954 }
2955 return false;
2956 }
2957 }
2958
2959 public boolean useLegacyHttpUpload() {
2960 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null
2961 && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2962 }
2963
2964 public long getMaxHttpUploadSize() {
2965 for (String namespace :
2966 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2967 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2968 if (items.size() > 0) {
2969 try {
2970 return Long.parseLong(
2971 items.get(0)
2972 .getValue()
2973 .getExtendedDiscoInformation(namespace, "max-file-size"));
2974 } catch (Exception e) {
2975 // ignored
2976 }
2977 }
2978 }
2979 return -1;
2980 }
2981
2982 public boolean stanzaIds() {
2983 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2984 }
2985
2986 public boolean bookmarks2() {
2987 return pepPublishOptions()
2988 && hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT);
2989 }
2990
2991 public boolean externalServiceDiscovery() {
2992 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2993 }
2994 }
2995}