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) {
1236 if (this.jingleListener != null) {
1237 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
1238 }
1239 } else {
1240 OnIqPacketReceived callback = null;
1241 synchronized (this.packetCallbacks) {
1242 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple =
1243 packetCallbacks.get(packet.getId());
1244 if (packetCallbackDuple != null) {
1245 // Packets to the server should have responses from the server
1246 if (packetCallbackDuple.first.toServer(account)) {
1247 if (packet.fromServer(account)) {
1248 callback = packetCallbackDuple.second;
1249 packetCallbacks.remove(packet.getId());
1250 } else {
1251 Log.e(
1252 Config.LOGTAG,
1253 account.getJid().asBareJid().toString()
1254 + ": ignoring spoofed iq packet");
1255 }
1256 } else {
1257 if (packet.getFrom() != null
1258 && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
1259 callback = packetCallbackDuple.second;
1260 packetCallbacks.remove(packet.getId());
1261 } else {
1262 Log.e(
1263 Config.LOGTAG,
1264 account.getJid().asBareJid().toString()
1265 + ": ignoring spoofed iq packet");
1266 }
1267 }
1268 } else if (packet.getType() == IqPacket.TYPE.GET
1269 || packet.getType() == IqPacket.TYPE.SET) {
1270 callback = this.unregisteredIqListener;
1271 }
1272 }
1273 if (callback != null) {
1274 try {
1275 callback.onIqPacketReceived(account, packet);
1276 } catch (StateChangingError error) {
1277 throw new StateChangingException(error.state);
1278 }
1279 }
1280 }
1281 }
1282
1283 private void processMessage(final Tag currentTag) throws IOException {
1284 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
1285 if (!packet.valid()) {
1286 Log.e(
1287 Config.LOGTAG,
1288 "encountered invalid message from='"
1289 + packet.getFrom()
1290 + "' to='"
1291 + packet.getTo()
1292 + "'");
1293 return;
1294 }
1295 this.messageListener.onMessagePacketReceived(account, packet);
1296 }
1297
1298 private void processPresence(final Tag currentTag) throws IOException {
1299 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
1300 if (!packet.valid()) {
1301 Log.e(
1302 Config.LOGTAG,
1303 "encountered invalid presence from='"
1304 + packet.getFrom()
1305 + "' to='"
1306 + packet.getTo()
1307 + "'");
1308 return;
1309 }
1310 this.presenceListener.onPresencePacketReceived(account, packet);
1311 }
1312
1313 private void sendStartTLS() throws IOException {
1314 final Tag startTLS = Tag.empty("starttls");
1315 startTLS.setAttribute("xmlns", Namespace.TLS);
1316 tagWriter.writeTag(startTLS);
1317 }
1318
1319 private void switchOverToTls() throws XmlPullParserException, IOException {
1320 tagReader.readTag();
1321 final Socket socket = this.socket;
1322 final SSLSocket sslSocket = upgradeSocketToTls(socket);
1323 this.socket = sslSocket;
1324 this.tagReader.setInputStream(sslSocket.getInputStream());
1325 this.tagWriter.setOutputStream(sslSocket.getOutputStream());
1326 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
1327 final boolean quickStart;
1328 try {
1329 quickStart = establishStream(SSLSockets.version(sslSocket));
1330 } catch (final InterruptedException e) {
1331 return;
1332 }
1333 if (quickStart) {
1334 this.quickStartInProgress = true;
1335 }
1336 features.encryptionEnabled = true;
1337 final Tag tag = tagReader.readTag();
1338 if (tag != null && tag.isStart("stream", Namespace.STREAMS)) {
1339 SSLSockets.log(account, sslSocket);
1340 processStream();
1341 } else {
1342 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
1343 }
1344 sslSocket.close();
1345 }
1346
1347 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
1348 final SSLSocketFactory sslSocketFactory;
1349 try {
1350 sslSocketFactory = getSSLSocketFactory();
1351 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
1352 throw new StateChangingException(Account.State.TLS_ERROR);
1353 }
1354 final InetAddress address = socket.getInetAddress();
1355 final SSLSocket sslSocket =
1356 (SSLSocket)
1357 sslSocketFactory.createSocket(
1358 socket, address.getHostAddress(), socket.getPort(), true);
1359 SSLSockets.setSecurity(sslSocket);
1360 SSLSockets.setHostname(sslSocket, IDN.toASCII(account.getServer()));
1361 SSLSockets.setApplicationProtocol(sslSocket, "xmpp-client");
1362 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
1363 try {
1364 if (!xmppDomainVerifier.verify(
1365 account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
1366 Log.d(
1367 Config.LOGTAG,
1368 account.getJid().asBareJid()
1369 + ": TLS certificate domain verification failed");
1370 FileBackend.close(sslSocket);
1371 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
1372 }
1373 } catch (final SSLPeerUnverifiedException e) {
1374 FileBackend.close(sslSocket);
1375 throw new StateChangingException(Account.State.TLS_ERROR);
1376 }
1377 return sslSocket;
1378 }
1379
1380 private void processStreamFeatures(final Tag currentTag) throws IOException {
1381 this.streamFeatures = tagReader.readElement(currentTag);
1382 final boolean isSecure = isSecure();
1383 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
1384 if (this.quickStartInProgress) {
1385 if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1386 Log.d(
1387 Config.LOGTAG,
1388 account.getJid().asBareJid()
1389 + ": quick start in progress. ignoring features: "
1390 + XmlHelper.printElementNames(this.streamFeatures));
1391 if (SaslMechanism.hashedToken(LoginInfo.mechanism(this.loginInfo))) {
1392 return;
1393 }
1394 if (isFastTokenAvailable(
1395 this.streamFeatures.findChild("authentication", Namespace.SASL_2))) {
1396 Log.d(
1397 Config.LOGTAG,
1398 account.getJid().asBareJid()
1399 + ": fast token available; resetting quick start");
1400 account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, false);
1401 mXmppConnectionService.databaseBackend.updateAccount(account);
1402 }
1403 return;
1404 }
1405 Log.d(
1406 Config.LOGTAG,
1407 account.getJid().asBareJid()
1408 + ": server lost support for SASL 2. quick start not possible");
1409 this.account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, false);
1410 mXmppConnectionService.databaseBackend.updateAccount(account);
1411 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1412 }
1413 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
1414 && !features.encryptionEnabled) {
1415 sendStartTLS();
1416 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1417 && account.isOptionSet(Account.OPTION_REGISTER)) {
1418 if (isSecure) {
1419 register();
1420 } else {
1421 Log.d(
1422 Config.LOGTAG,
1423 account.getJid().asBareJid()
1424 + ": unable to find STARTTLS for registration process "
1425 + XmlHelper.printElementNames(this.streamFeatures));
1426 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1427 }
1428 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1429 && account.isOptionSet(Account.OPTION_REGISTER)) {
1430 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
1431 } else if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)
1432 && shouldAuthenticate
1433 && isSecure) {
1434 authenticate(SaslMechanism.Version.SASL_2);
1435 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
1436 && shouldAuthenticate
1437 && isSecure) {
1438 authenticate(SaslMechanism.Version.SASL);
1439 } else if (this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT)
1440 && streamId != null
1441 && !inSmacksSession) {
1442 if (Config.EXTENDED_SM_LOGGING) {
1443 Log.d(
1444 Config.LOGTAG,
1445 account.getJid().asBareJid()
1446 + ": resuming after stanza #"
1447 + stanzasReceived);
1448 }
1449 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1450 this.mSmCatchupMessageCounter.set(0);
1451 this.mWaitingForSmCatchup.set(true);
1452 this.tagWriter.writeStanzaAsync(resume);
1453 } else if (needsBinding) {
1454 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
1455 sendBindRequest();
1456 } else {
1457 Log.d(
1458 Config.LOGTAG,
1459 account.getJid().asBareJid()
1460 + ": unable to find bind feature "
1461 + XmlHelper.printElementNames(this.streamFeatures));
1462 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1463 }
1464 } else {
1465
1466 Log.d(
1467 Config.LOGTAG,
1468 account.getJid().asBareJid()
1469 + ": received NOP stream features: "
1470 + XmlHelper.printElementNames(this.streamFeatures));
1471 }
1472 }
1473
1474 private void authenticate() throws IOException {
1475 final boolean isSecure = isSecure();
1476 if (isSecure && this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1477 authenticate(SaslMechanism.Version.SASL_2);
1478 } else if (isSecure && this.streamFeatures.hasChild("mechanisms", Namespace.SASL)) {
1479 authenticate(SaslMechanism.Version.SASL);
1480 } else {
1481 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1482 }
1483 }
1484
1485 private boolean isSecure() {
1486 return features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
1487 }
1488
1489 private void authenticate(final SaslMechanism.Version version) throws IOException {
1490 final Element authElement;
1491 if (version == SaslMechanism.Version.SASL) {
1492 authElement = this.streamFeatures.findChild("mechanisms", Namespace.SASL);
1493 } else {
1494 authElement = this.streamFeatures.findChild("authentication", Namespace.SASL_2);
1495 }
1496 final Collection<String> mechanisms = SaslMechanism.mechanisms(authElement);
1497 final Element cbElement =
1498 this.streamFeatures.findChild("sasl-channel-binding", Namespace.CHANNEL_BINDING);
1499 final Collection<ChannelBinding> channelBindings = ChannelBinding.of(cbElement);
1500 final SaslMechanism.Factory factory = new SaslMechanism.Factory(account);
1501 final SaslMechanism saslMechanism =
1502 factory.of(mechanisms, channelBindings, version, SSLSockets.version(this.socket));
1503 this.validate(saslMechanism, mechanisms);
1504 final boolean quickStartAvailable;
1505 final String firstMessage =
1506 saslMechanism.getClientFirstMessage(sslSocketOrNull(this.socket));
1507 final boolean usingFast = SaslMechanism.hashedToken(saslMechanism);
1508 final Element authenticate;
1509 if (version == SaslMechanism.Version.SASL) {
1510 authenticate = new Element("auth", Namespace.SASL);
1511 if (!Strings.isNullOrEmpty(firstMessage)) {
1512 authenticate.setContent(firstMessage);
1513 }
1514 quickStartAvailable = false;
1515 this.loginInfo = new LoginInfo(saslMechanism, version, Collections.emptyList());
1516 } else if (version == SaslMechanism.Version.SASL_2) {
1517 final Element inline = authElement.findChild("inline", Namespace.SASL_2);
1518 final boolean sm = inline != null && inline.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1519 final HashedToken.Mechanism hashTokenRequest;
1520 if (usingFast) {
1521 hashTokenRequest = null;
1522 } else {
1523 final Element fast =
1524 inline == null ? null : inline.findChild("fast", Namespace.FAST);
1525 final Collection<String> fastMechanisms = SaslMechanism.mechanisms(fast);
1526 hashTokenRequest =
1527 HashedToken.Mechanism.best(fastMechanisms, SSLSockets.version(this.socket));
1528 }
1529 final Collection<String> bindFeatures = Bind2.features(inline);
1530 quickStartAvailable =
1531 sm
1532 && bindFeatures != null
1533 && bindFeatures.containsAll(Bind2.QUICKSTART_FEATURES);
1534 if (bindFeatures != null) {
1535 try {
1536 mXmppConnectionService.restoredFromDatabaseLatch.await();
1537 } catch (final InterruptedException e) {
1538 Log.d(
1539 Config.LOGTAG,
1540 account.getJid().asBareJid()
1541 + ": interrupted while waiting for DB restore during SASL2 bind");
1542 return;
1543 }
1544 }
1545 this.loginInfo = new LoginInfo(saslMechanism, version, bindFeatures);
1546 this.hashTokenRequest = hashTokenRequest;
1547 authenticate =
1548 generateAuthenticationRequest(
1549 firstMessage, usingFast, hashTokenRequest, bindFeatures, sm);
1550 } else {
1551 throw new AssertionError("Missing implementation for " + version);
1552 }
1553
1554 if (account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, quickStartAvailable)) {
1555 mXmppConnectionService.databaseBackend.updateAccount(account);
1556 }
1557
1558 Log.d(
1559 Config.LOGTAG,
1560 account.getJid().toString()
1561 + ": Authenticating with "
1562 + version
1563 + "/"
1564 + LoginInfo.mechanism(this.loginInfo).getMechanism());
1565 authenticate.setAttribute("mechanism", LoginInfo.mechanism(this.loginInfo).getMechanism());
1566 synchronized (this.mStanzaQueue) {
1567 this.stanzasSentBeforeAuthentication = this.stanzasSent;
1568 tagWriter.writeElement(authenticate);
1569 }
1570 }
1571
1572 private static boolean isFastTokenAvailable(final Element authentication) {
1573 final Element inline = authentication == null ? null : authentication.findChild("inline");
1574 return inline != null && inline.hasChild("fast", Namespace.FAST);
1575 }
1576
1577 private void validate(
1578 final @Nullable SaslMechanism saslMechanism, Collection<String> mechanisms)
1579 throws StateChangingException {
1580 if (saslMechanism == null) {
1581 Log.d(
1582 Config.LOGTAG,
1583 account.getJid().asBareJid()
1584 + ": unable to find supported SASL mechanism in "
1585 + mechanisms);
1586 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1587 }
1588 if (SaslMechanism.hashedToken(saslMechanism)) {
1589 return;
1590 }
1591 final int pinnedMechanism = account.getPinnedMechanismPriority();
1592 if (pinnedMechanism > saslMechanism.getPriority()) {
1593 Log.e(
1594 Config.LOGTAG,
1595 "Auth failed. Authentication mechanism "
1596 + saslMechanism.getMechanism()
1597 + " has lower priority ("
1598 + saslMechanism.getPriority()
1599 + ") than pinned priority ("
1600 + pinnedMechanism
1601 + "). Possible downgrade attack?");
1602 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1603 }
1604 }
1605
1606 private Element generateAuthenticationRequest(
1607 final String firstMessage, final boolean usingFast) {
1608 return generateAuthenticationRequest(
1609 firstMessage, usingFast, null, Bind2.QUICKSTART_FEATURES, true);
1610 }
1611
1612 private Element generateAuthenticationRequest(
1613 final String firstMessage,
1614 final boolean usingFast,
1615 final HashedToken.Mechanism hashedTokenRequest,
1616 final Collection<String> bind,
1617 final boolean inlineStreamManagement) {
1618 final Element authenticate = new Element("authenticate", Namespace.SASL_2);
1619 if (!Strings.isNullOrEmpty(firstMessage)) {
1620 authenticate.addChild("initial-response").setContent(firstMessage);
1621 }
1622 final Element userAgent = authenticate.addChild("user-agent");
1623 userAgent.setAttribute("id", AccountUtils.publicDeviceId(account));
1624 userAgent
1625 .addChild("software")
1626 .setContent(mXmppConnectionService.getString(R.string.app_name));
1627 if (!PhoneHelper.isEmulator()) {
1628 userAgent
1629 .addChild("device")
1630 .setContent(String.format("%s %s", Build.MANUFACTURER, Build.MODEL));
1631 }
1632 // do not include bind if 'inlineStreamManagement' is missing and we have a streamId
1633 // (because we would rather just do a normal SM/resume)
1634 final boolean mayAttemptBind = streamId == null || inlineStreamManagement;
1635 if (bind != null && mayAttemptBind) {
1636 authenticate.addChild(generateBindRequest(bind));
1637 }
1638 if (inlineStreamManagement && streamId != null) {
1639 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1640 this.mSmCatchupMessageCounter.set(0);
1641 this.mWaitingForSmCatchup.set(true);
1642 authenticate.addChild(resume);
1643 }
1644 if (hashedTokenRequest != null) {
1645 authenticate
1646 .addChild("request-token", Namespace.FAST)
1647 .setAttribute("mechanism", hashedTokenRequest.name());
1648 }
1649 if (usingFast) {
1650 authenticate.addChild("fast", Namespace.FAST);
1651 }
1652 return authenticate;
1653 }
1654
1655 private Element generateBindRequest(final Collection<String> bindFeatures) {
1656 Log.d(Config.LOGTAG, "inline bind features: " + bindFeatures);
1657 final Element bind = new Element("bind", Namespace.BIND2);
1658 bind.addChild("tag").setContent(mXmppConnectionService.getString(R.string.app_name));
1659 if (bindFeatures.contains(Namespace.CARBONS)) {
1660 bind.addChild("enable", Namespace.CARBONS);
1661 }
1662 if (bindFeatures.contains(Namespace.STREAM_MANAGEMENT)) {
1663 bind.addChild(new EnablePacket());
1664 }
1665 return bind;
1666 }
1667
1668 private void register() {
1669 final String preAuth = account.getKey(Account.KEY_PRE_AUTH_REGISTRATION_TOKEN);
1670 if (preAuth != null && features.invite()) {
1671 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1672 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1673 sendUnmodifiedIqPacket(
1674 preAuthRequest,
1675 (account, response) -> {
1676 if (response.getType() == IqPacket.TYPE.RESULT) {
1677 sendRegistryRequest();
1678 } else {
1679 final String error = response.getErrorCondition();
1680 Log.d(
1681 Config.LOGTAG,
1682 account.getJid().asBareJid()
1683 + ": failed to pre auth. "
1684 + error);
1685 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1686 }
1687 },
1688 true);
1689 } else {
1690 sendRegistryRequest();
1691 }
1692 }
1693
1694 private void sendRegistryRequest() {
1695 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1696 register.query(Namespace.REGISTER);
1697 register.setTo(account.getDomain());
1698 sendUnmodifiedIqPacket(
1699 register,
1700 (account, packet) -> {
1701 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1702 return;
1703 }
1704 if (packet.getType() == IqPacket.TYPE.ERROR) {
1705 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1706 }
1707 final Element query = packet.query(Namespace.REGISTER);
1708 if (query.hasChild("username") && (query.hasChild("password"))) {
1709 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1710 final Element username =
1711 new Element("username").setContent(account.getUsername());
1712 final Element password =
1713 new Element("password").setContent(account.getPassword());
1714 register1.query(Namespace.REGISTER).addChild(username);
1715 register1.query().addChild(password);
1716 register1.setFrom(account.getJid().asBareJid());
1717 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1718 } else if (query.hasChild("x", Namespace.DATA)) {
1719 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1720 final Element blob = query.findChild("data", "urn:xmpp:bob");
1721 final String id = packet.getId();
1722 InputStream is;
1723 if (blob != null) {
1724 try {
1725 final String base64Blob = blob.getContent();
1726 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1727 is = new ByteArrayInputStream(strBlob);
1728 } catch (Exception e) {
1729 is = null;
1730 }
1731 } else {
1732 final boolean useTor =
1733 mXmppConnectionService.useTorToConnect() || account.isOnion();
1734 try {
1735 final String url = data.getValue("url");
1736 final String fallbackUrl = data.getValue("captcha-fallback-url");
1737 if (url != null) {
1738 is = HttpConnectionManager.open(url, useTor);
1739 } else if (fallbackUrl != null) {
1740 is = HttpConnectionManager.open(fallbackUrl, useTor);
1741 } else {
1742 is = null;
1743 }
1744 } catch (final IOException e) {
1745 Log.d(
1746 Config.LOGTAG,
1747 account.getJid().asBareJid() + ": unable to fetch captcha",
1748 e);
1749 is = null;
1750 }
1751 }
1752
1753 if (is != null) {
1754 Bitmap captcha = BitmapFactory.decodeStream(is);
1755 try {
1756 if (mXmppConnectionService.displayCaptchaRequest(
1757 account, id, data, captcha)) {
1758 return;
1759 }
1760 } catch (Exception e) {
1761 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1762 }
1763 }
1764 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1765 } else if (query.hasChild("instructions")
1766 || query.hasChild("x", Namespace.OOB)) {
1767 final String instructions = query.findChildContent("instructions");
1768 final Element oob = query.findChild("x", Namespace.OOB);
1769 final String url = oob == null ? null : oob.findChildContent("url");
1770 if (url != null) {
1771 setAccountCreationFailed(url);
1772 } else if (instructions != null) {
1773 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1774 if (matcher.find()) {
1775 setAccountCreationFailed(
1776 instructions.substring(matcher.start(), matcher.end()));
1777 }
1778 }
1779 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1780 }
1781 },
1782 true);
1783 }
1784
1785 private void setAccountCreationFailed(final String url) {
1786 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1787 if (httpUrl != null && httpUrl.isHttps()) {
1788 this.redirectionUrl = httpUrl;
1789 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1790 }
1791 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1792 }
1793
1794 public HttpUrl getRedirectionUrl() {
1795 return this.redirectionUrl;
1796 }
1797
1798 public void resetEverything() {
1799 resetAttemptCount(true);
1800 resetStreamId();
1801 clearIqCallbacks();
1802 this.stanzasSent = 0;
1803 mStanzaQueue.clear();
1804 this.redirectionUrl = null;
1805 synchronized (this.disco) {
1806 disco.clear();
1807 }
1808 synchronized (this.commands) {
1809 this.commands.clear();
1810 }
1811 this.loginInfo = null;
1812 }
1813
1814 private void sendBindRequest() {
1815 try {
1816 mXmppConnectionService.restoredFromDatabaseLatch.await();
1817 } catch (InterruptedException e) {
1818 Log.d(
1819 Config.LOGTAG,
1820 account.getJid().asBareJid()
1821 + ": interrupted while waiting for DB restore during bind");
1822 return;
1823 }
1824 clearIqCallbacks();
1825 if (account.getJid().isBareJid()) {
1826 account.setResource(this.createNewResource());
1827 } else {
1828 fixResource(mXmppConnectionService, account);
1829 }
1830 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1831 final String resource =
1832 Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1833 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1834 this.sendUnmodifiedIqPacket(
1835 iq,
1836 (account, packet) -> {
1837 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1838 return;
1839 }
1840 final Element bind = packet.findChild("bind");
1841 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1842 isBound = true;
1843 final Element jid = bind.findChild("jid");
1844 if (jid != null && jid.getContent() != null) {
1845 try {
1846 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1847 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1848 Log.d(
1849 Config.LOGTAG,
1850 account.getJid().asBareJid()
1851 + ": server tried to re-assign domain to "
1852 + assignedJid.getDomain());
1853 throw new StateChangingError(Account.State.BIND_FAILURE);
1854 }
1855 if (account.setJid(assignedJid)) {
1856 Log.d(
1857 Config.LOGTAG,
1858 account.getJid().asBareJid()
1859 + ": jid changed during bind. updating database");
1860 mXmppConnectionService.databaseBackend.updateAccount(account);
1861 }
1862 if (streamFeatures.hasChild("session")
1863 && !streamFeatures
1864 .findChild("session")
1865 .hasChild("optional")) {
1866 sendStartSession();
1867 } else {
1868 final boolean waitForDisco = enableStreamManagement();
1869 sendPostBindInitialization(waitForDisco, false);
1870 }
1871 return;
1872 } catch (final IllegalArgumentException e) {
1873 Log.d(
1874 Config.LOGTAG,
1875 account.getJid().asBareJid()
1876 + ": server reported invalid jid ("
1877 + jid.getContent()
1878 + ") on bind");
1879 }
1880 } else {
1881 Log.d(
1882 Config.LOGTAG,
1883 account.getJid()
1884 + ": disconnecting because of bind failure. (no jid)");
1885 }
1886 } else {
1887 Log.d(
1888 Config.LOGTAG,
1889 account.getJid()
1890 + ": disconnecting because of bind failure ("
1891 + packet);
1892 }
1893 final Element error = packet.findChild("error");
1894 if (packet.getType() == IqPacket.TYPE.ERROR
1895 && error != null
1896 && error.hasChild("conflict")) {
1897 account.setResource(createNewResource());
1898 }
1899 throw new StateChangingError(Account.State.BIND_FAILURE);
1900 },
1901 true);
1902 }
1903
1904 private void clearIqCallbacks() {
1905 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1906 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1907 synchronized (this.packetCallbacks) {
1908 if (this.packetCallbacks.size() == 0) {
1909 return;
1910 }
1911 Log.d(
1912 Config.LOGTAG,
1913 account.getJid().asBareJid()
1914 + ": clearing "
1915 + this.packetCallbacks.size()
1916 + " iq callbacks");
1917 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator =
1918 this.packetCallbacks.values().iterator();
1919 while (iterator.hasNext()) {
1920 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1921 callbacks.add(entry.second);
1922 iterator.remove();
1923 }
1924 }
1925 for (OnIqPacketReceived callback : callbacks) {
1926 try {
1927 callback.onIqPacketReceived(account, failurePacket);
1928 } catch (StateChangingError error) {
1929 Log.d(
1930 Config.LOGTAG,
1931 account.getJid().asBareJid()
1932 + ": caught StateChangingError("
1933 + error.state.toString()
1934 + ") while clearing callbacks");
1935 // ignore
1936 }
1937 }
1938 Log.d(
1939 Config.LOGTAG,
1940 account.getJid().asBareJid()
1941 + ": done clearing iq callbacks. "
1942 + this.packetCallbacks.size()
1943 + " left");
1944 }
1945
1946 public void sendDiscoTimeout() {
1947 if (mWaitForDisco.compareAndSet(true, false)) {
1948 Log.d(
1949 Config.LOGTAG,
1950 account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1951 finalizeBind();
1952 }
1953 }
1954
1955 private void sendStartSession() {
1956 Log.d(
1957 Config.LOGTAG,
1958 account.getJid().asBareJid() + ": sending legacy session to outdated server");
1959 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1960 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1961 this.sendUnmodifiedIqPacket(
1962 startSession,
1963 (account, packet) -> {
1964 if (packet.getType() == IqPacket.TYPE.RESULT) {
1965 final boolean waitForDisco = enableStreamManagement();
1966 sendPostBindInitialization(waitForDisco, false);
1967 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1968 throw new StateChangingError(Account.State.SESSION_FAILURE);
1969 }
1970 },
1971 true);
1972 }
1973
1974 private boolean enableStreamManagement() {
1975 final boolean streamManagement =
1976 this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1977 if (streamManagement) {
1978 synchronized (this.mStanzaQueue) {
1979 final EnablePacket enable = new EnablePacket();
1980 tagWriter.writeStanzaAsync(enable);
1981 stanzasSent = 0;
1982 mStanzaQueue.clear();
1983 }
1984 return true;
1985 } else {
1986 return false;
1987 }
1988 }
1989
1990 private void sendPostBindInitialization(
1991 final boolean waitForDisco, final boolean carbonsEnabled) {
1992 features.carbonsEnabled = carbonsEnabled;
1993 features.blockListRequested = false;
1994 synchronized (this.disco) {
1995 this.disco.clear();
1996 }
1997 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1998 mPendingServiceDiscoveries.set(0);
1999 mWaitForDisco.set(waitForDisco);
2000 lastDiscoStarted = SystemClock.elapsedRealtime();
2001 mXmppConnectionService.scheduleWakeUpCall(
2002 Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
2003 final Element caps = streamFeatures.findChild("c");
2004 final String hash = caps == null ? null : caps.getAttribute("hash");
2005 final String ver = caps == null ? null : caps.getAttribute("ver");
2006 ServiceDiscoveryResult discoveryResult = null;
2007 if (hash != null && ver != null) {
2008 discoveryResult =
2009 mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
2010 }
2011 final boolean requestDiscoItemsFirst =
2012 !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
2013 if (requestDiscoItemsFirst) {
2014 sendServiceDiscoveryItems(account.getDomain());
2015 }
2016 if (discoveryResult == null) {
2017 sendServiceDiscoveryInfo(account.getDomain());
2018 } else {
2019 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
2020 disco.put(account.getDomain(), discoveryResult);
2021 }
2022 discoverMamPreferences();
2023 sendServiceDiscoveryInfo(account.getJid().asBareJid());
2024 if (!requestDiscoItemsFirst) {
2025 sendServiceDiscoveryItems(account.getDomain());
2026 }
2027
2028 if (!mWaitForDisco.get()) {
2029 finalizeBind();
2030 }
2031 this.lastSessionStarted = SystemClock.elapsedRealtime();
2032 }
2033
2034 private void sendServiceDiscoveryInfo(final Jid jid) {
2035 mPendingServiceDiscoveries.incrementAndGet();
2036 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2037 iq.setTo(jid);
2038 iq.query("http://jabber.org/protocol/disco#info");
2039 this.sendIqPacket(
2040 iq,
2041 (account, packet) -> {
2042 if (packet.getType() == IqPacket.TYPE.RESULT) {
2043 boolean advancedStreamFeaturesLoaded;
2044 synchronized (XmppConnection.this.disco) {
2045 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
2046 if (jid.equals(account.getDomain())) {
2047 mXmppConnectionService.databaseBackend.insertDiscoveryResult(
2048 result);
2049 }
2050 disco.put(jid, result);
2051 advancedStreamFeaturesLoaded =
2052 disco.containsKey(account.getDomain())
2053 && disco.containsKey(account.getJid().asBareJid());
2054 }
2055 if (advancedStreamFeaturesLoaded
2056 && (jid.equals(account.getDomain())
2057 || jid.equals(account.getJid().asBareJid()))) {
2058 enableAdvancedStreamFeatures();
2059 }
2060 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
2061 Log.d(
2062 Config.LOGTAG,
2063 account.getJid().asBareJid()
2064 + ": could not query disco info for "
2065 + jid.toString());
2066 final boolean serverOrAccount =
2067 jid.equals(account.getDomain())
2068 || jid.equals(account.getJid().asBareJid());
2069 final boolean advancedStreamFeaturesLoaded;
2070 if (serverOrAccount) {
2071 synchronized (XmppConnection.this.disco) {
2072 disco.put(jid, ServiceDiscoveryResult.empty());
2073 advancedStreamFeaturesLoaded =
2074 disco.containsKey(account.getDomain())
2075 && disco.containsKey(account.getJid().asBareJid());
2076 }
2077 } else {
2078 advancedStreamFeaturesLoaded = false;
2079 }
2080 if (advancedStreamFeaturesLoaded) {
2081 enableAdvancedStreamFeatures();
2082 }
2083 }
2084 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2085 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2086 && mWaitForDisco.compareAndSet(true, false)) {
2087 finalizeBind();
2088 }
2089 }
2090 });
2091 }
2092
2093 private void discoverMamPreferences() {
2094 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2095 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
2096 sendIqPacket(
2097 request,
2098 (account, response) -> {
2099 if (response.getType() == IqPacket.TYPE.RESULT) {
2100 Element prefs =
2101 response.findChild(
2102 "prefs", MessageArchiveService.Version.MAM_2.namespace);
2103 isMamPreferenceAlways =
2104 "always"
2105 .equals(
2106 prefs == null
2107 ? null
2108 : prefs.getAttribute("default"));
2109 }
2110 });
2111 }
2112
2113 private void discoverCommands() {
2114 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2115 request.setTo(account.getDomain());
2116 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
2117 sendIqPacket(
2118 request,
2119 (account, response) -> {
2120 if (response.getType() == IqPacket.TYPE.RESULT) {
2121 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
2122 if (query == null) {
2123 return;
2124 }
2125 final HashMap<String, Jid> commands = new HashMap<>();
2126 for (final Element child : query.getChildren()) {
2127 if ("item".equals(child.getName())) {
2128 final String node = child.getAttribute("node");
2129 final Jid jid = child.getAttributeAsJid("jid");
2130 if (node != null && jid != null) {
2131 commands.put(node, jid);
2132 }
2133 }
2134 }
2135 synchronized (this.commands) {
2136 this.commands.clear();
2137 this.commands.putAll(commands);
2138 }
2139 }
2140 });
2141 }
2142
2143 public boolean isMamPreferenceAlways() {
2144 return isMamPreferenceAlways;
2145 }
2146
2147 private void finalizeBind() {
2148 if (bindListener != null) {
2149 bindListener.onBind(account);
2150 }
2151 changeStatusToOnline();
2152 }
2153
2154 private void enableAdvancedStreamFeatures() {
2155 if (getFeatures().blocking() && !features.blockListRequested) {
2156 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
2157 this.sendIqPacket(
2158 getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
2159 }
2160 for (final OnAdvancedStreamFeaturesLoaded listener :
2161 advancedStreamFeaturesLoadedListeners) {
2162 listener.onAdvancedStreamFeaturesAvailable(account);
2163 }
2164 if (getFeatures().carbons() && !features.carbonsEnabled) {
2165 sendEnableCarbons();
2166 }
2167 if (getFeatures().commands()) {
2168 discoverCommands();
2169 }
2170 }
2171
2172 private void sendServiceDiscoveryItems(final Jid server) {
2173 mPendingServiceDiscoveries.incrementAndGet();
2174 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2175 iq.setTo(server.getDomain());
2176 iq.query("http://jabber.org/protocol/disco#items");
2177 this.sendIqPacket(
2178 iq,
2179 (account, packet) -> {
2180 if (packet.getType() == IqPacket.TYPE.RESULT) {
2181 final HashSet<Jid> items = new HashSet<>();
2182 final List<Element> elements = packet.query().getChildren();
2183 for (final Element element : elements) {
2184 if (element.getName().equals("item")) {
2185 final Jid jid =
2186 InvalidJid.getNullForInvalid(
2187 element.getAttributeAsJid("jid"));
2188 if (jid != null && !jid.equals(account.getDomain())) {
2189 items.add(jid);
2190 }
2191 }
2192 }
2193 for (Jid jid : items) {
2194 sendServiceDiscoveryInfo(jid);
2195 }
2196 } else {
2197 Log.d(
2198 Config.LOGTAG,
2199 account.getJid().asBareJid()
2200 + ": could not query disco items of "
2201 + server);
2202 }
2203 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2204 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2205 && mWaitForDisco.compareAndSet(true, false)) {
2206 finalizeBind();
2207 }
2208 }
2209 });
2210 }
2211
2212 private void sendEnableCarbons() {
2213 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
2214 iq.addChild("enable", Namespace.CARBONS);
2215 this.sendIqPacket(
2216 iq,
2217 (account, packet) -> {
2218 if (packet.getType() == IqPacket.TYPE.RESULT) {
2219 Log.d(
2220 Config.LOGTAG,
2221 account.getJid().asBareJid() + ": successfully enabled carbons");
2222 features.carbonsEnabled = true;
2223 } else {
2224 Log.d(
2225 Config.LOGTAG,
2226 account.getJid().asBareJid()
2227 + ": could not enable carbons "
2228 + packet);
2229 }
2230 });
2231 }
2232
2233 private void processStreamError(final Tag currentTag) throws IOException {
2234 final Element streamError = tagReader.readElement(currentTag);
2235 if (streamError == null) {
2236 return;
2237 }
2238 if (streamError.hasChild("conflict")) {
2239 account.setResource(createNewResource());
2240 Log.d(
2241 Config.LOGTAG,
2242 account.getJid().asBareJid()
2243 + ": switching resource due to conflict ("
2244 + account.getResource()
2245 + ")");
2246 throw new IOException();
2247 } else if (streamError.hasChild("host-unknown")) {
2248 throw new StateChangingException(Account.State.HOST_UNKNOWN);
2249 } else if (streamError.hasChild("policy-violation")) {
2250 this.lastConnect = SystemClock.elapsedRealtime();
2251 final String text = streamError.findChildContent("text");
2252 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
2253 failPendingMessages(text);
2254 throw new StateChangingException(Account.State.POLICY_VIOLATION);
2255 } else if (streamError.hasChild("see-other-host")) {
2256 final String seeOtherHost = streamError.findChildContent("see-other-host");
2257 final Resolver.Result currentResolverResult = this.currentResolverResult;
2258 if (Strings.isNullOrEmpty(seeOtherHost) || currentResolverResult == null) {
2259 Log.d(
2260 Config.LOGTAG,
2261 account.getJid().asBareJid() + ": stream error " + streamError);
2262 throw new StateChangingException(Account.State.STREAM_ERROR);
2263 }
2264 Log.d(
2265 Config.LOGTAG,
2266 account.getJid().asBareJid()
2267 + ": see other host: "
2268 + seeOtherHost
2269 + " "
2270 + currentResolverResult);
2271 final Resolver.Result seeOtherResult = currentResolverResult.seeOtherHost(seeOtherHost);
2272 if (seeOtherResult != null) {
2273 this.seeOtherHostResolverResult = seeOtherResult;
2274 throw new StateChangingException(Account.State.SEE_OTHER_HOST);
2275 } else {
2276 throw new StateChangingException(Account.State.STREAM_ERROR);
2277 }
2278 } else {
2279 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
2280 throw new StateChangingException(Account.State.STREAM_ERROR);
2281 }
2282 }
2283
2284 private void failPendingMessages(final String error) {
2285 synchronized (this.mStanzaQueue) {
2286 for (int i = 0; i < mStanzaQueue.size(); ++i) {
2287 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
2288 if (stanza instanceof MessagePacket) {
2289 final MessagePacket packet = (MessagePacket) stanza;
2290 final String id = packet.getId();
2291 final Jid to = packet.getTo();
2292 mXmppConnectionService.markMessage(
2293 account, to.asBareJid(), id, Message.STATUS_SEND_FAILED, error);
2294 }
2295 }
2296 }
2297 }
2298
2299 private boolean establishStream(final SSLSockets.Version sslVersion)
2300 throws IOException, InterruptedException {
2301 final boolean secureConnection = sslVersion != SSLSockets.Version.NONE;
2302 final SaslMechanism quickStartMechanism;
2303 if (secureConnection) {
2304 quickStartMechanism =
2305 SaslMechanism.ensureAvailable(account.getQuickStartMechanism(), sslVersion);
2306 } else {
2307 quickStartMechanism = null;
2308 }
2309 if (secureConnection
2310 && Config.QUICKSTART_ENABLED
2311 && quickStartMechanism != null
2312 && account.isOptionSet(Account.OPTION_QUICKSTART_AVAILABLE)) {
2313 mXmppConnectionService.restoredFromDatabaseLatch.await();
2314 this.loginInfo =
2315 new LoginInfo(
2316 quickStartMechanism,
2317 SaslMechanism.Version.SASL_2,
2318 Bind2.QUICKSTART_FEATURES);
2319 final boolean usingFast = quickStartMechanism instanceof HashedToken;
2320 final Element authenticate =
2321 generateAuthenticationRequest(
2322 quickStartMechanism.getClientFirstMessage(sslSocketOrNull(this.socket)),
2323 usingFast);
2324 authenticate.setAttribute("mechanism", quickStartMechanism.getMechanism());
2325 sendStartStream(true, false);
2326 synchronized (this.mStanzaQueue) {
2327 this.stanzasSentBeforeAuthentication = this.stanzasSent;
2328 tagWriter.writeElement(authenticate);
2329 }
2330 Log.d(
2331 Config.LOGTAG,
2332 account.getJid().toString()
2333 + ": quick start with "
2334 + quickStartMechanism.getMechanism());
2335 return true;
2336 } else {
2337 sendStartStream(secureConnection, true);
2338 return false;
2339 }
2340 }
2341
2342 private void sendStartStream(final boolean from, final boolean flush) throws IOException {
2343 final Tag stream = Tag.start("stream:stream");
2344 stream.setAttribute("to", account.getServer());
2345 if (from) {
2346 stream.setAttribute("from", account.getJid().asBareJid().toEscapedString());
2347 }
2348 stream.setAttribute("version", "1.0");
2349 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
2350 stream.setAttribute("xmlns", Namespace.JABBER_CLIENT);
2351 stream.setAttribute("xmlns:stream", Namespace.STREAMS);
2352 tagWriter.writeTag(stream, flush);
2353 }
2354
2355 private String createNewResource() {
2356 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
2357 }
2358
2359 private String nextRandomId() {
2360 return nextRandomId(false);
2361 }
2362
2363 private String nextRandomId(final boolean s) {
2364 return CryptoHelper.random(s ? 3 : 9);
2365 }
2366
2367 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
2368 packet.setFrom(account.getJid());
2369 return this.sendUnmodifiedIqPacket(packet, callback, false);
2370 }
2371
2372 public synchronized String sendUnmodifiedIqPacket(
2373 final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
2374 if (packet.getId() == null) {
2375 packet.setAttribute("id", nextRandomId());
2376 }
2377 if (callback != null) {
2378 synchronized (this.packetCallbacks) {
2379 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
2380 }
2381 }
2382 this.sendPacket(packet, force);
2383 return packet.getId();
2384 }
2385
2386 public void sendMessagePacket(final MessagePacket packet) {
2387 this.sendPacket(packet);
2388 }
2389
2390 public void sendPresencePacket(final PresencePacket packet) {
2391 this.sendPacket(packet);
2392 }
2393
2394 private synchronized void sendPacket(final AbstractStanza packet) {
2395 sendPacket(packet, false);
2396 }
2397
2398 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
2399 if (stanzasSent == Integer.MAX_VALUE) {
2400 resetStreamId();
2401 disconnect(true);
2402 return;
2403 }
2404 synchronized (this.mStanzaQueue) {
2405 if (force || isBound) {
2406 tagWriter.writeStanzaAsync(packet);
2407 } else {
2408 Log.d(
2409 Config.LOGTAG,
2410 account.getJid().asBareJid()
2411 + " do not write stanza to unbound stream "
2412 + packet.toString());
2413 }
2414 if (packet instanceof AbstractAcknowledgeableStanza) {
2415 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
2416
2417 if (this.mStanzaQueue.size() != 0) {
2418 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
2419 if (currentHighestKey != stanzasSent) {
2420 throw new AssertionError("Stanza count messed up");
2421 }
2422 }
2423
2424 ++stanzasSent;
2425 if (Config.EXTENDED_SM_LOGGING) {
2426 Log.d(
2427 Config.LOGTAG,
2428 account.getJid().asBareJid()
2429 + ": counting outbound "
2430 + packet.getName()
2431 + " as #"
2432 + stanzasSent);
2433 }
2434 this.mStanzaQueue.append(stanzasSent, stanza);
2435 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
2436 if (Config.EXTENDED_SM_LOGGING) {
2437 Log.d(
2438 Config.LOGTAG,
2439 account.getJid().asBareJid()
2440 + ": requesting ack for message stanza #"
2441 + stanzasSent);
2442 }
2443 tagWriter.writeStanzaAsync(new RequestPacket());
2444 }
2445 }
2446 }
2447 }
2448
2449 public void sendPing() {
2450 if (!r()) {
2451 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2452 iq.setFrom(account.getJid());
2453 iq.addChild("ping", Namespace.PING);
2454 this.sendIqPacket(iq, null);
2455 }
2456 this.lastPingSent = SystemClock.elapsedRealtime();
2457 }
2458
2459 public void setOnMessagePacketReceivedListener(final OnMessagePacketReceived listener) {
2460 this.messageListener = listener;
2461 }
2462
2463 public void setOnUnregisteredIqPacketReceivedListener(final OnIqPacketReceived listener) {
2464 this.unregisteredIqListener = listener;
2465 }
2466
2467 public void setOnPresencePacketReceivedListener(final OnPresencePacketReceived listener) {
2468 this.presenceListener = listener;
2469 }
2470
2471 public void setOnJinglePacketReceivedListener(final OnJinglePacketReceived listener) {
2472 this.jingleListener = listener;
2473 }
2474
2475 public void setOnStatusChangedListener(final OnStatusChanged listener) {
2476 this.statusListener = listener;
2477 }
2478
2479 public void setOnBindListener(final OnBindListener listener) {
2480 this.bindListener = listener;
2481 }
2482
2483 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
2484 this.acknowledgedListener = listener;
2485 }
2486
2487 public void addOnAdvancedStreamFeaturesAvailableListener(
2488 final OnAdvancedStreamFeaturesLoaded listener) {
2489 this.advancedStreamFeaturesLoadedListeners.add(listener);
2490 }
2491
2492 private void forceCloseSocket() {
2493 FileBackend.close(this.socket);
2494 FileBackend.close(this.tagReader);
2495 }
2496
2497 public void interrupt() {
2498 if (this.mThread != null) {
2499 this.mThread.interrupt();
2500 }
2501 }
2502
2503 public void disconnect(final boolean force) {
2504 interrupt();
2505 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
2506 if (force) {
2507 forceCloseSocket();
2508 } else {
2509 final TagWriter currentTagWriter = this.tagWriter;
2510 if (currentTagWriter.isActive()) {
2511 currentTagWriter.finish();
2512 final Socket currentSocket = this.socket;
2513 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
2514 try {
2515 currentTagWriter.await(1, TimeUnit.SECONDS);
2516 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
2517 currentTagWriter.writeTag(Tag.end("stream:stream"));
2518 if (streamCountDownLatch != null) {
2519 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
2520 Log.d(
2521 Config.LOGTAG,
2522 account.getJid().asBareJid() + ": remote ended stream");
2523 } else {
2524 Log.d(
2525 Config.LOGTAG,
2526 account.getJid().asBareJid()
2527 + ": remote has not closed socket. force closing");
2528 }
2529 }
2530 } catch (InterruptedException e) {
2531 Log.d(
2532 Config.LOGTAG,
2533 account.getJid().asBareJid()
2534 + ": interrupted while gracefully closing stream");
2535 } catch (final IOException e) {
2536 Log.d(
2537 Config.LOGTAG,
2538 account.getJid().asBareJid()
2539 + ": io exception during disconnect ("
2540 + e.getMessage()
2541 + ")");
2542 } finally {
2543 FileBackend.close(currentSocket);
2544 }
2545 } else {
2546 forceCloseSocket();
2547 }
2548 }
2549 }
2550
2551 private void resetStreamId() {
2552 this.streamId = null;
2553 this.boundStreamFeatures = null;
2554 }
2555
2556 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
2557 synchronized (this.disco) {
2558 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
2559 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
2560 if (cursor.getValue().getFeatures().contains(feature)) {
2561 items.add(cursor);
2562 }
2563 }
2564 return items;
2565 }
2566 }
2567
2568 public Jid findDiscoItemByFeature(final String feature) {
2569 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
2570 if (items.size() >= 1) {
2571 return items.get(0).getKey();
2572 }
2573 return null;
2574 }
2575
2576 public boolean r() {
2577 if (getFeatures().sm()) {
2578 this.tagWriter.writeStanzaAsync(new RequestPacket());
2579 return true;
2580 } else {
2581 return false;
2582 }
2583 }
2584
2585 public List<String> getMucServersWithholdAccount() {
2586 final List<String> servers = getMucServers();
2587 servers.remove(account.getDomain().toEscapedString());
2588 return servers;
2589 }
2590
2591 public List<String> getMucServers() {
2592 List<String> servers = new ArrayList<>();
2593 synchronized (this.disco) {
2594 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
2595 final ServiceDiscoveryResult value = cursor.getValue();
2596 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
2597 && value.hasIdentity("conference", "text")
2598 && !value.getFeatures().contains("jabber:iq:gateway")
2599 && !value.hasIdentity("conference", "irc")) {
2600 servers.add(cursor.getKey().toString());
2601 }
2602 }
2603 }
2604 return servers;
2605 }
2606
2607 public String getMucServer() {
2608 List<String> servers = getMucServers();
2609 return servers.size() > 0 ? servers.get(0) : null;
2610 }
2611
2612 public int getTimeToNextAttempt(final boolean aggressive) {
2613 final int interval;
2614 if (aggressive) {
2615 interval = Math.min((int) (3 * Math.pow(1.3, attempt)), 60);
2616 } else {
2617 final int additionalTime =
2618 account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
2619 interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
2620 }
2621 final int secondsSinceLast =
2622 (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
2623 return interval - secondsSinceLast;
2624 }
2625
2626 public int getAttempt() {
2627 return this.attempt;
2628 }
2629
2630 public Features getFeatures() {
2631 return this.features;
2632 }
2633
2634 public long getLastSessionEstablished() {
2635 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
2636 return System.currentTimeMillis() - diff;
2637 }
2638
2639 public long getLastConnect() {
2640 return this.lastConnect;
2641 }
2642
2643 public long getLastPingSent() {
2644 return this.lastPingSent;
2645 }
2646
2647 public long getLastDiscoStarted() {
2648 return this.lastDiscoStarted;
2649 }
2650
2651 public long getLastPacketReceived() {
2652 return this.lastPacketReceived;
2653 }
2654
2655 public void sendActive() {
2656 this.sendPacket(new ActivePacket());
2657 }
2658
2659 public void sendInactive() {
2660 this.sendPacket(new InactivePacket());
2661 }
2662
2663 public void resetAttemptCount(boolean resetConnectTime) {
2664 this.attempt = 0;
2665 if (resetConnectTime) {
2666 this.lastConnect = 0;
2667 }
2668 }
2669
2670 public void setInteractive(boolean interactive) {
2671 this.mInteractive = interactive;
2672 }
2673
2674 private IqGenerator getIqGenerator() {
2675 return mXmppConnectionService.getIqGenerator();
2676 }
2677
2678 private class MyKeyManager implements X509KeyManager {
2679 @Override
2680 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
2681 return account.getPrivateKeyAlias();
2682 }
2683
2684 @Override
2685 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
2686 return null;
2687 }
2688
2689 @Override
2690 public X509Certificate[] getCertificateChain(String alias) {
2691 Log.d(Config.LOGTAG, "getting certificate chain");
2692 try {
2693 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
2694 } catch (final Exception e) {
2695 Log.d(Config.LOGTAG, "could not get certificate chain", e);
2696 return new X509Certificate[0];
2697 }
2698 }
2699
2700 @Override
2701 public String[] getClientAliases(String s, Principal[] principals) {
2702 final String alias = account.getPrivateKeyAlias();
2703 return alias != null ? new String[] {alias} : new String[0];
2704 }
2705
2706 @Override
2707 public String[] getServerAliases(String s, Principal[] principals) {
2708 return new String[0];
2709 }
2710
2711 @Override
2712 public PrivateKey getPrivateKey(String alias) {
2713 try {
2714 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
2715 } catch (Exception e) {
2716 return null;
2717 }
2718 }
2719 }
2720
2721 private static class LoginInfo {
2722 public final SaslMechanism saslMechanism;
2723 public final SaslMechanism.Version saslVersion;
2724 public final List<String> inlineBindFeatures;
2725
2726 private LoginInfo(
2727 final SaslMechanism saslMechanism,
2728 final SaslMechanism.Version saslVersion,
2729 final Collection<String> inlineBindFeatures) {
2730 Preconditions.checkNotNull(saslMechanism, "SASL Mechanism must not be null");
2731 Preconditions.checkNotNull(saslVersion, "SASL version must not be null");
2732 this.saslMechanism = saslMechanism;
2733 this.saslVersion = saslVersion;
2734 this.inlineBindFeatures =
2735 inlineBindFeatures == null
2736 ? Collections.emptyList()
2737 : ImmutableList.copyOf(inlineBindFeatures);
2738 }
2739
2740 public static SaslMechanism mechanism(final LoginInfo loginInfo) {
2741 return loginInfo == null ? null : loginInfo.saslMechanism;
2742 }
2743 }
2744
2745 private static class StreamId {
2746 public final String id;
2747 public final Resolver.Result location;
2748
2749 private StreamId(String id, Resolver.Result location) {
2750 this.id = id;
2751 this.location = location;
2752 }
2753
2754 @NonNull
2755 @Override
2756 public String toString() {
2757 return MoreObjects.toStringHelper(this)
2758 .add("id", id)
2759 .add("location", location)
2760 .toString();
2761 }
2762 }
2763
2764 private static class StateChangingError extends Error {
2765 private final Account.State state;
2766
2767 public StateChangingError(Account.State state) {
2768 this.state = state;
2769 }
2770 }
2771
2772 private static class StateChangingException extends IOException {
2773 private final Account.State state;
2774
2775 public StateChangingException(Account.State state) {
2776 this.state = state;
2777 }
2778 }
2779
2780 public class Features {
2781 XmppConnection connection;
2782 private boolean carbonsEnabled = false;
2783 private boolean encryptionEnabled = false;
2784 private boolean blockListRequested = false;
2785
2786 public Features(final XmppConnection connection) {
2787 this.connection = connection;
2788 }
2789
2790 private boolean hasDiscoFeature(final Jid server, final String feature) {
2791 synchronized (XmppConnection.this.disco) {
2792 final ServiceDiscoveryResult sdr = connection.disco.get(server);
2793 return sdr != null && sdr.getFeatures().contains(feature);
2794 }
2795 }
2796
2797 public boolean carbons() {
2798 return hasDiscoFeature(account.getDomain(), Namespace.CARBONS);
2799 }
2800
2801 public boolean commands() {
2802 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2803 }
2804
2805 public boolean easyOnboardingInvites() {
2806 synchronized (commands) {
2807 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2808 }
2809 }
2810
2811 public boolean bookmarksConversion() {
2812 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION)
2813 && pepPublishOptions();
2814 }
2815
2816 public boolean avatarConversion() {
2817 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION)
2818 && pepPublishOptions();
2819 }
2820
2821 public boolean blocking() {
2822 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2823 }
2824
2825 public boolean spamReporting() {
2826 return hasDiscoFeature(account.getDomain(), Namespace.REPORTING);
2827 }
2828
2829 public boolean flexibleOfflineMessageRetrieval() {
2830 return hasDiscoFeature(
2831 account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2832 }
2833
2834 public boolean register() {
2835 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2836 }
2837
2838 public boolean invite() {
2839 return connection.streamFeatures != null
2840 && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2841 }
2842
2843 public boolean sm() {
2844 return streamId != null
2845 || (connection.streamFeatures != null
2846 && connection.streamFeatures.hasChild(
2847 "sm", Namespace.STREAM_MANAGEMENT));
2848 }
2849
2850 public boolean csi() {
2851 return connection.streamFeatures != null
2852 && connection.streamFeatures.hasChild("csi", Namespace.CSI);
2853 }
2854
2855 public boolean pep() {
2856 synchronized (XmppConnection.this.disco) {
2857 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2858 return info != null && info.hasIdentity("pubsub", "pep");
2859 }
2860 }
2861
2862 public boolean pepPersistent() {
2863 synchronized (XmppConnection.this.disco) {
2864 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2865 return info != null
2866 && info.getFeatures()
2867 .contains("http://jabber.org/protocol/pubsub#persistent-items");
2868 }
2869 }
2870
2871 public boolean pepPublishOptions() {
2872 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2873 }
2874
2875 public boolean pepOmemoWhitelisted() {
2876 return hasDiscoFeature(
2877 account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2878 }
2879
2880 public boolean mam() {
2881 return MessageArchiveService.Version.has(getAccountFeatures());
2882 }
2883
2884 public List<String> getAccountFeatures() {
2885 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2886 return result == null ? Collections.emptyList() : result.getFeatures();
2887 }
2888
2889 public boolean push() {
2890 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2891 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2892 }
2893
2894 public boolean rosterVersioning() {
2895 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2896 }
2897
2898 public void setBlockListRequested(boolean value) {
2899 this.blockListRequested = value;
2900 }
2901
2902 public boolean httpUpload(long filesize) {
2903 if (Config.DISABLE_HTTP_UPLOAD) {
2904 return false;
2905 } else {
2906 for (String namespace :
2907 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2908 List<Entry<Jid, ServiceDiscoveryResult>> items =
2909 findDiscoItemsByFeature(namespace);
2910 if (items.size() > 0) {
2911 try {
2912 long maxsize =
2913 Long.parseLong(
2914 items.get(0)
2915 .getValue()
2916 .getExtendedDiscoInformation(
2917 namespace, "max-file-size"));
2918 if (filesize <= maxsize) {
2919 return true;
2920 } else {
2921 Log.d(
2922 Config.LOGTAG,
2923 account.getJid().asBareJid()
2924 + ": http upload is not available for files with size "
2925 + filesize
2926 + " (max is "
2927 + maxsize
2928 + ")");
2929 return false;
2930 }
2931 } catch (Exception e) {
2932 return true;
2933 }
2934 }
2935 }
2936 return false;
2937 }
2938 }
2939
2940 public boolean useLegacyHttpUpload() {
2941 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null
2942 && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2943 }
2944
2945 public long getMaxHttpUploadSize() {
2946 for (String namespace :
2947 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2948 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2949 if (items.size() > 0) {
2950 try {
2951 return Long.parseLong(
2952 items.get(0)
2953 .getValue()
2954 .getExtendedDiscoInformation(namespace, "max-file-size"));
2955 } catch (Exception e) {
2956 // ignored
2957 }
2958 }
2959 }
2960 return -1;
2961 }
2962
2963 public boolean stanzaIds() {
2964 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2965 }
2966
2967 public boolean bookmarks2() {
2968 return pepPublishOptions()
2969 && hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT);
2970 }
2971
2972 public boolean externalServiceDiscovery() {
2973 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2974 }
2975 }
2976}