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 boolean offlineMessagesRetrieved = false;
169 private Element streamFeatures;
170 private Element boundStreamFeatures;
171 private StreamId streamId = null;
172 private int stanzasReceived = 0;
173 private int stanzasSent = 0;
174 private int stanzasSentBeforeAuthentication;
175 private long lastPacketReceived = 0;
176 private long lastPingSent = 0;
177 private long lastConnect = 0;
178 private long lastSessionStarted = 0;
179 private long lastDiscoStarted = 0;
180 private boolean isMamPreferenceAlways = false;
181 private final AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
182 private final AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
183 private final AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
184 private final AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
185 private boolean mInteractive = false;
186 private int attempt = 0;
187 private OnPresencePacketReceived presenceListener = null;
188 private OnJinglePacketReceived jingleListener = null;
189 private OnIqPacketReceived unregisteredIqListener = null;
190 private OnMessagePacketReceived messageListener = null;
191 private OnStatusChanged statusListener = null;
192 private OnBindListener bindListener = null;
193 private OnMessageAcknowledged acknowledgedListener = null;
194 private LoginInfo loginInfo;
195 private HashedToken.Mechanism hashTokenRequest;
196 private HttpUrl redirectionUrl = null;
197 private String verifiedHostname = null;
198 private Resolver.Result currentResolverResult;
199 private Resolver.Result seeOtherHostResolverResult;
200 private volatile Thread mThread;
201 private CountDownLatch mStreamCountDownLatch;
202
203 public XmppConnection(final Account account, final XmppConnectionService service) {
204 this.account = account;
205 this.mXmppConnectionService = service;
206 }
207
208 private static void fixResource(Context context, Account account) {
209 String resource = account.getResource();
210 int fixedPartLength =
211 context.getString(R.string.app_name).length() + 1; // include the trailing dot
212 int randomPartLength = 4; // 3 bytes
213 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
214 if (validBase64(
215 resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
216 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
217 }
218 }
219 }
220
221 private static boolean validBase64(String input) {
222 try {
223 return Base64.decode(input, Base64.URL_SAFE).length == 3;
224 } catch (Throwable throwable) {
225 return false;
226 }
227 }
228
229 private void changeStatus(final Account.State nextStatus) {
230 synchronized (this) {
231 if (Thread.currentThread().isInterrupted()) {
232 Log.d(
233 Config.LOGTAG,
234 account.getJid().asBareJid()
235 + ": not changing status to "
236 + nextStatus
237 + " because thread was interrupted");
238 return;
239 }
240 if (account.getStatus() != nextStatus) {
241 if (nextStatus == Account.State.OFFLINE
242 && account.getStatus() != Account.State.CONNECTING
243 && account.getStatus() != Account.State.ONLINE
244 && account.getStatus() != Account.State.DISABLED
245 && account.getStatus() != Account.State.LOGGED_OUT) {
246 return;
247 }
248 if (nextStatus == Account.State.ONLINE) {
249 this.attempt = 0;
250 }
251 account.setStatus(nextStatus);
252 } else {
253 return;
254 }
255 }
256 if (statusListener != null) {
257 statusListener.onStatusChanged(account);
258 }
259 }
260
261 public Jid getJidForCommand(final String node) {
262 synchronized (this.commands) {
263 return this.commands.get(node);
264 }
265 }
266
267 public void prepareNewConnection() {
268 this.lastConnect = SystemClock.elapsedRealtime();
269 this.lastPingSent = SystemClock.elapsedRealtime();
270 this.lastDiscoStarted = Long.MAX_VALUE;
271 this.mWaitingForSmCatchup.set(false);
272 this.changeStatus(Account.State.CONNECTING);
273 }
274
275 public boolean isWaitingForSmCatchup() {
276 return mWaitingForSmCatchup.get();
277 }
278
279 public void incrementSmCatchupMessageCounter() {
280 this.mSmCatchupMessageCounter.incrementAndGet();
281 }
282
283 protected void connect() {
284 if (mXmppConnectionService.areMessagesInitialized()) {
285 mXmppConnectionService.resetSendingToWaiting(account);
286 }
287 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
288 this.loginInfo = null;
289 this.features.encryptionEnabled = false;
290 this.inSmacksSession = false;
291 this.quickStartInProgress = false;
292 this.isBound = false;
293 this.attempt++;
294 this.verifiedHostname =
295 null; // will be set if user entered hostname is being used or hostname was verified
296 // with dnssec
297 try {
298 Socket localSocket;
299 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
300 this.changeStatus(Account.State.CONNECTING);
301 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
302 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
303 if (useTor) {
304 String destination;
305 if (account.getHostname().isEmpty() || account.isOnion()) {
306 destination = account.getServer();
307 } else {
308 destination = account.getHostname();
309 this.verifiedHostname = destination;
310 }
311
312 final int port = account.getPort();
313 final boolean directTls = Resolver.useDirectTls(port);
314
315 Log.d(
316 Config.LOGTAG,
317 account.getJid().asBareJid()
318 + ": connect to "
319 + destination
320 + " via Tor. directTls="
321 + directTls);
322 localSocket = SocksSocketFactory.createSocketOverTor(destination, port);
323
324 if (directTls) {
325 localSocket = upgradeSocketToTls(localSocket);
326 features.encryptionEnabled = true;
327 }
328
329 try {
330 startXmpp(localSocket);
331 } catch (final InterruptedException e) {
332 Log.d(
333 Config.LOGTAG,
334 account.getJid().asBareJid()
335 + ": thread was interrupted before beginning stream");
336 return;
337 } catch (final Exception e) {
338 throw new IOException("Could not start stream", e);
339 }
340 } else {
341 final String domain = account.getServer();
342 final List<Resolver.Result> results = new ArrayList<>();
343 final boolean hardcoded = extended && !account.getHostname().isEmpty();
344 if (hardcoded) {
345 results.addAll(
346 Resolver.fromHardCoded(account.getHostname(), account.getPort()));
347 } else {
348 results.addAll(Resolver.resolve(domain));
349 }
350 if (Thread.currentThread().isInterrupted()) {
351 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
352 return;
353 }
354 if (results.size() == 0) {
355 Log.e(
356 Config.LOGTAG,
357 account.getJid().asBareJid() + ": Resolver results were empty");
358 return;
359 }
360 final Resolver.Result storedBackupResult;
361 if (hardcoded) {
362 storedBackupResult = null;
363 } else {
364 storedBackupResult =
365 mXmppConnectionService.databaseBackend.findResolverResult(domain);
366 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
367 results.add(storedBackupResult);
368 Log.d(
369 Config.LOGTAG,
370 account.getJid().asBareJid()
371 + ": loaded backup resolver result from db: "
372 + storedBackupResult);
373 }
374 }
375 final StreamId streamId = this.streamId;
376 final Resolver.Result resumeLocation = streamId == null ? null : streamId.location;
377 if (resumeLocation != null) {
378 Log.d(
379 Config.LOGTAG,
380 account.getJid().asBareJid()
381 + ": injected resume location on position 0");
382 results.add(0, resumeLocation);
383 }
384 final Resolver.Result seeOtherHost = this.seeOtherHostResolverResult;
385 if (seeOtherHost != null) {
386 Log.d(
387 Config.LOGTAG,
388 account.getJid().asBareJid()
389 + ": injected see-other-host on position 0");
390 results.add(0, seeOtherHost);
391 }
392 for (final Iterator<Resolver.Result> iterator = results.iterator();
393 iterator.hasNext(); ) {
394 final Resolver.Result result = iterator.next();
395 if (Thread.currentThread().isInterrupted()) {
396 Log.d(
397 Config.LOGTAG,
398 account.getJid().asBareJid() + ": Thread was interrupted");
399 return;
400 }
401 try {
402 // if tls is true, encryption is implied and must not be started
403 features.encryptionEnabled = result.isDirectTls();
404 verifiedHostname =
405 result.isAuthenticated() ? result.getHostname().toString() : null;
406 final InetSocketAddress addr;
407 if (result.getIp() != null) {
408 addr = new InetSocketAddress(result.getIp(), result.getPort());
409 Log.d(
410 Config.LOGTAG,
411 account.getJid().asBareJid().toString()
412 + ": using values from resolver "
413 + (result.getHostname() == null
414 ? ""
415 : result.getHostname().toString() + "/")
416 + result.getIp().getHostAddress()
417 + ":"
418 + result.getPort()
419 + " tls: "
420 + features.encryptionEnabled);
421 } else {
422 addr =
423 new InetSocketAddress(
424 IDN.toASCII(result.getHostname().toString()),
425 result.getPort());
426 Log.d(
427 Config.LOGTAG,
428 account.getJid().asBareJid().toString()
429 + ": using values from resolver "
430 + result.getHostname().toString()
431 + ":"
432 + result.getPort()
433 + " tls: "
434 + features.encryptionEnabled);
435 }
436
437 localSocket = new Socket();
438 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
439
440 if (features.encryptionEnabled) {
441 localSocket = upgradeSocketToTls(localSocket);
442 }
443
444 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
445 if (startXmpp(localSocket)) {
446 localSocket.setSoTimeout(
447 0); // reset to 0; once the connection is established we don’t
448 // want this
449 if (!hardcoded && !result.equals(storedBackupResult)) {
450 mXmppConnectionService.databaseBackend.saveResolverResult(
451 domain, result);
452 }
453 this.currentResolverResult = result;
454 this.seeOtherHostResolverResult = null;
455 break; // successfully connected to server that speaks xmpp
456 } else {
457 FileBackend.close(localSocket);
458 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
459 }
460 } catch (final StateChangingException e) {
461 if (!iterator.hasNext()) {
462 throw e;
463 }
464 } catch (InterruptedException e) {
465 Log.d(
466 Config.LOGTAG,
467 account.getJid().asBareJid()
468 + ": thread was interrupted before beginning stream");
469 return;
470 } catch (final Throwable e) {
471 Log.d(
472 Config.LOGTAG,
473 account.getJid().asBareJid().toString()
474 + ": "
475 + e.getMessage()
476 + "("
477 + e.getClass().getName()
478 + ")");
479 if (!iterator.hasNext()) {
480 throw new UnknownHostException();
481 }
482 }
483 }
484 }
485 processStream();
486 } catch (final SecurityException e) {
487 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
488 } catch (final StateChangingException e) {
489 this.changeStatus(e.state);
490 } catch (final UnknownHostException
491 | ConnectException
492 | SocksSocketFactory.HostNotFoundException e) {
493 this.changeStatus(Account.State.SERVER_NOT_FOUND);
494 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
495 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
496 } catch (final IOException | XmlPullParserException e) {
497 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
498 this.changeStatus(Account.State.OFFLINE);
499 this.attempt = Math.max(0, this.attempt - 1);
500 } finally {
501 if (!Thread.currentThread().isInterrupted()) {
502 forceCloseSocket();
503 } else {
504 Log.d(
505 Config.LOGTAG,
506 account.getJid().asBareJid()
507 + ": not force closing socket because thread was interrupted");
508 }
509 }
510 }
511
512 /**
513 * Starts xmpp protocol, call after connecting to socket
514 *
515 * @return true if server returns with valid xmpp, false otherwise
516 */
517 private boolean startXmpp(final Socket socket) throws Exception {
518 if (Thread.currentThread().isInterrupted()) {
519 throw new InterruptedException();
520 }
521 this.socket = socket;
522 tagReader = new XmlReader();
523 if (tagWriter != null) {
524 tagWriter.forceClose();
525 }
526 tagWriter = new TagWriter();
527 tagWriter.setOutputStream(socket.getOutputStream());
528 tagReader.setInputStream(socket.getInputStream());
529 tagWriter.beginDocument();
530 final boolean quickStart;
531 if (socket instanceof SSLSocket sslSocket) {
532 SSLSockets.log(account, sslSocket);
533 quickStart = establishStream(SSLSockets.version(sslSocket));
534 } else {
535 quickStart = establishStream(SSLSockets.Version.NONE);
536 }
537 final Tag tag = tagReader.readTag();
538 if (Thread.currentThread().isInterrupted()) {
539 throw new InterruptedException();
540 }
541 if (tag == null) {
542 return false;
543 }
544 final boolean success = tag.isStart("stream", Namespace.STREAMS);
545 if (success) {
546 final var from = tag.getAttribute("from");
547 if (from == null || !from.equals(account.getServer())) {
548 throw new StateChangingException(Account.State.HOST_UNKNOWN);
549 }
550 }
551 if (success && quickStart) {
552 this.quickStartInProgress = true;
553 }
554 return success;
555 }
556
557 private SSLSocketFactory getSSLSocketFactory()
558 throws NoSuchAlgorithmException, KeyManagementException {
559 final SSLContext sc = SSLSockets.getSSLContext();
560 final MemorizingTrustManager trustManager =
561 this.mXmppConnectionService.getMemorizingTrustManager();
562 final KeyManager[] keyManager;
563 if (account.getPrivateKeyAlias() != null) {
564 keyManager = new KeyManager[] {new MyKeyManager()};
565 } else {
566 keyManager = null;
567 }
568 final String domain = account.getServer();
569 sc.init(
570 keyManager,
571 new X509TrustManager[] {
572 mInteractive
573 ? trustManager.getInteractive(domain)
574 : trustManager.getNonInteractive(domain)
575 },
576 SECURE_RANDOM);
577 return sc.getSocketFactory();
578 }
579
580 @Override
581 public void run() {
582 synchronized (this) {
583 this.mThread = Thread.currentThread();
584 if (this.mThread.isInterrupted()) {
585 Log.d(
586 Config.LOGTAG,
587 account.getJid().asBareJid()
588 + ": aborting connect because thread was interrupted");
589 return;
590 }
591 forceCloseSocket();
592 }
593 connect();
594 }
595
596 private void processStream() throws XmlPullParserException, IOException {
597 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
598 this.mStreamCountDownLatch = streamCountDownLatch;
599 Tag nextTag = tagReader.readTag();
600 while (nextTag != null && !nextTag.isEnd("stream")) {
601 if (nextTag.isStart("error")) {
602 processStreamError(nextTag);
603 } else if (nextTag.isStart("features", Namespace.STREAMS)) {
604 processStreamFeatures(nextTag);
605 } else if (nextTag.isStart("proceed", Namespace.TLS)) {
606 switchOverToTls();
607 } else if (nextTag.isStart("failure", Namespace.TLS)) {
608 throw new StateChangingException(Account.State.TLS_ERROR);
609 } else if (account.isOptionSet(Account.OPTION_REGISTER)
610 && nextTag.isStart("iq", Namespace.JABBER_CLIENT)) {
611 processIq(nextTag);
612 } else if (!isSecure() || this.loginInfo == null) {
613 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
614 } else if (nextTag.isStart("success")) {
615 final Element success = tagReader.readElement(nextTag);
616 if (processSuccess(success)) {
617 break;
618 }
619 } else if (nextTag.isStart("failure")) {
620 final Element failure = tagReader.readElement(nextTag);
621 processFailure(failure);
622 } else if (nextTag.isStart("continue", Namespace.SASL_2)) {
623 // two step sasl2 - we don’t support this yet
624 throw new StateChangingException(Account.State.INCOMPATIBLE_CLIENT);
625 } else if (nextTag.isStart("challenge")) {
626 final Element challenge = tagReader.readElement(nextTag);
627 processChallenge(challenge);
628 } else if (!LoginInfo.isSuccess(this.loginInfo)) {
629 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
630 } else if (this.streamId != null
631 && nextTag.isStart("resumed", Namespace.STREAM_MANAGEMENT)) {
632 final Element resumed = tagReader.readElement(nextTag);
633 processResumed(resumed);
634 } else if (nextTag.isStart("failed", Namespace.STREAM_MANAGEMENT)) {
635 final Element failed = tagReader.readElement(nextTag);
636 processFailed(failed, true);
637 } else if (nextTag.isStart("iq", Namespace.JABBER_CLIENT)) {
638 processIq(nextTag);
639 } else if (!isBound) {
640 Log.d(
641 Config.LOGTAG,
642 account.getJid().asBareJid()
643 + ": server sent unexpected"
644 + nextTag.identifier());
645 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
646 } else if (nextTag.isStart("message", Namespace.JABBER_CLIENT)) {
647 processMessage(nextTag);
648 } else if (nextTag.isStart("presence", Namespace.JABBER_CLIENT)) {
649 processPresence(nextTag);
650 } else if (nextTag.isStart("enabled", Namespace.STREAM_MANAGEMENT)) {
651 final Element enabled = tagReader.readElement(nextTag);
652 processEnabled(enabled);
653 } else if (nextTag.isStart("r", Namespace.STREAM_MANAGEMENT)) {
654 tagReader.readElement(nextTag);
655 if (Config.EXTENDED_SM_LOGGING) {
656 Log.d(
657 Config.LOGTAG,
658 account.getJid().asBareJid()
659 + ": acknowledging stanza #"
660 + this.stanzasReceived);
661 }
662 final AckPacket ack = new AckPacket(this.stanzasReceived);
663 tagWriter.writeStanzaAsync(ack);
664 } else if (nextTag.isStart("a", Namespace.STREAM_MANAGEMENT)) {
665 boolean accountUiNeedsRefresh = false;
666 synchronized (NotificationService.CATCHUP_LOCK) {
667 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
668 final int messageCount = mSmCatchupMessageCounter.get();
669 final int pendingIQs = packetCallbacks.size();
670 Log.d(
671 Config.LOGTAG,
672 account.getJid().asBareJid()
673 + ": SM catchup complete (messages="
674 + messageCount
675 + ", pending IQs="
676 + pendingIQs
677 + ")");
678 accountUiNeedsRefresh = true;
679 if (messageCount > 0) {
680 mXmppConnectionService
681 .getNotificationService()
682 .finishBacklog(true, account);
683 }
684 }
685 }
686 if (accountUiNeedsRefresh) {
687 mXmppConnectionService.updateAccountUi();
688 }
689 final Element ack = tagReader.readElement(nextTag);
690 lastPacketReceived = SystemClock.elapsedRealtime();
691 final boolean acknowledgedMessages;
692 synchronized (this.mStanzaQueue) {
693 final Optional<Integer> serverSequence = ack.getOptionalIntAttribute("h");
694 if (serverSequence.isPresent()) {
695 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence.get());
696 } else {
697 acknowledgedMessages = false;
698 Log.d(
699 Config.LOGTAG,
700 account.getJid().asBareJid()
701 + ": server send ack without sequence number");
702 }
703 }
704 if (acknowledgedMessages) {
705 mXmppConnectionService.updateConversationUi();
706 }
707 } else {
708 Log.e(
709 Config.LOGTAG,
710 account.getJid().asBareJid()
711 + ": Encountered unknown stream element"
712 + nextTag.identifier());
713 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
714 }
715 nextTag = tagReader.readTag();
716 }
717 if (nextTag != null && nextTag.isEnd("stream")) {
718 streamCountDownLatch.countDown();
719 }
720 }
721
722 private void processChallenge(final Element challenge) throws IOException {
723 final SaslMechanism.Version version;
724 try {
725 version = SaslMechanism.Version.of(challenge);
726 } catch (final IllegalArgumentException e) {
727 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
728 }
729 final Element response;
730 if (version == SaslMechanism.Version.SASL) {
731 response = new Element("response", Namespace.SASL);
732 } else if (version == SaslMechanism.Version.SASL_2) {
733 response = new Element("response", Namespace.SASL_2);
734 } else {
735 throw new AssertionError("Missing implementation for " + version);
736 }
737 final LoginInfo currentLoginInfo = this.loginInfo;
738 if (currentLoginInfo == null || LoginInfo.isSuccess(currentLoginInfo)) {
739 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
740 }
741 try {
742 response.setContent(
743 currentLoginInfo.saslMechanism.getResponse(
744 challenge.getContent(), sslSocketOrNull(socket)));
745 } catch (final SaslMechanism.AuthenticationException e) {
746 // TODO: Send auth abort tag.
747 Log.e(Config.LOGTAG, e.toString());
748 throw new StateChangingException(Account.State.UNAUTHORIZED);
749 }
750 tagWriter.writeElement(response);
751 }
752
753 private boolean processSuccess(final Element success)
754 throws IOException, XmlPullParserException {
755 final SaslMechanism.Version version;
756 try {
757 version = SaslMechanism.Version.of(success);
758 } catch (final IllegalArgumentException e) {
759 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
760 }
761 final LoginInfo currentLoginInfo = this.loginInfo;
762 final SaslMechanism currentSaslMechanism = LoginInfo.mechanism(currentLoginInfo);
763 if (currentLoginInfo == null || currentSaslMechanism == null) {
764 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
765 }
766 final String challenge;
767 if (version == SaslMechanism.Version.SASL) {
768 challenge = success.getContent();
769 } else if (version == SaslMechanism.Version.SASL_2) {
770 challenge = success.findChildContent("additional-data");
771 } else {
772 throw new AssertionError("Missing implementation for " + version);
773 }
774 try {
775 currentLoginInfo.success(challenge, sslSocketOrNull(socket));
776 } catch (final SaslMechanism.AuthenticationException e) {
777 Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": authentication failure ", e);
778 throw new StateChangingException(Account.State.UNAUTHORIZED);
779 }
780 Log.d(
781 Config.LOGTAG,
782 account.getJid().asBareJid().toString() + ": logged in (using " + version + ")");
783 if (SaslMechanism.pin(currentSaslMechanism)) {
784 account.setPinnedMechanism(currentSaslMechanism);
785 }
786 if (version == SaslMechanism.Version.SASL_2) {
787 final String authorizationIdentifier =
788 success.findChildContent("authorization-identifier");
789 final Jid authorizationJid;
790 try {
791 authorizationJid =
792 Strings.isNullOrEmpty(authorizationIdentifier)
793 ? null
794 : Jid.ofEscaped(authorizationIdentifier);
795 } catch (final IllegalArgumentException e) {
796 Log.d(
797 Config.LOGTAG,
798 account.getJid().asBareJid()
799 + ": SASL 2.0 authorization identifier was not a valid jid");
800 throw new StateChangingException(Account.State.BIND_FAILURE);
801 }
802 if (authorizationJid == null) {
803 throw new StateChangingException(Account.State.BIND_FAILURE);
804 }
805 Log.d(
806 Config.LOGTAG,
807 account.getJid().asBareJid()
808 + ": SASL 2.0 authorization identifier was "
809 + authorizationJid);
810 if (!account.getJid().getDomain().equals(authorizationJid.getDomain())) {
811 Log.d(
812 Config.LOGTAG,
813 account.getJid().asBareJid()
814 + ": server tried to re-assign domain to "
815 + authorizationJid.getDomain());
816 throw new StateChangingError(Account.State.BIND_FAILURE);
817 }
818 if (authorizationJid.isFullJid() && account.setJid(authorizationJid)) {
819 Log.d(
820 Config.LOGTAG,
821 account.getJid().asBareJid()
822 + ": jid changed during SASL 2.0. updating database");
823 }
824 final Element bound = success.findChild("bound", Namespace.BIND2);
825 final Element resumed = success.findChild("resumed", Namespace.STREAM_MANAGEMENT);
826 final Element failed = success.findChild("failed", Namespace.STREAM_MANAGEMENT);
827 final Element tokenWrapper = success.findChild("token", Namespace.FAST);
828 final String token = tokenWrapper == null ? null : tokenWrapper.getAttribute("token");
829 if (bound != null && resumed != null) {
830 Log.d(
831 Config.LOGTAG,
832 account.getJid().asBareJid()
833 + ": server sent bound and resumed in SASL2 success");
834 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
835 }
836 if (resumed != null && streamId != null) {
837 if (this.boundStreamFeatures != null) {
838 this.streamFeatures = this.boundStreamFeatures;
839 Log.d(
840 Config.LOGTAG,
841 "putting previous stream features back in place: "
842 + XmlHelper.printElementNames(this.boundStreamFeatures));
843 }
844 processResumed(resumed);
845 } else if (failed != null) {
846 processFailed(failed, false); // wait for new stream features
847 }
848 if (bound != null) {
849 clearIqCallbacks();
850 this.isBound = true;
851 processNopStreamFeatures();
852 this.boundStreamFeatures = this.streamFeatures;
853 final Element streamManagementEnabled =
854 bound.findChild("enabled", Namespace.STREAM_MANAGEMENT);
855 final Element carbonsEnabled = bound.findChild("enabled", Namespace.CARBONS);
856 final boolean waitForDisco;
857 if (streamManagementEnabled != null) {
858 resetOutboundStanzaQueue();
859 processEnabled(streamManagementEnabled);
860 waitForDisco = true;
861 } else {
862 // if we did not enable stream management in bind do it now
863 waitForDisco = enableStreamManagement();
864 }
865 final boolean negotiatedCarbons;
866 if (carbonsEnabled != null) {
867 negotiatedCarbons = true;
868 Log.d(
869 Config.LOGTAG,
870 account.getJid().asBareJid()
871 + ": successfully enabled carbons (via Bind 2.0)");
872 features.carbonsEnabled = true;
873 } else if (loginInfo.inlineBindFeatures.contains(Namespace.CARBONS)) {
874 negotiatedCarbons = true;
875 Log.d(
876 Config.LOGTAG,
877 account.getJid().asBareJid()
878 + ": successfully enabled carbons (via Bind 2.0/implicit)");
879 features.carbonsEnabled = true;
880 } else {
881 negotiatedCarbons = false;
882 }
883 sendPostBindInitialization(waitForDisco, negotiatedCarbons);
884 }
885 final HashedToken.Mechanism tokenMechanism;
886 if (SaslMechanism.hashedToken(currentSaslMechanism)) {
887 tokenMechanism = ((HashedToken) currentSaslMechanism).getTokenMechanism();
888 } else if (this.hashTokenRequest != null) {
889 tokenMechanism = this.hashTokenRequest;
890 } else {
891 tokenMechanism = null;
892 }
893 if (tokenMechanism != null && !Strings.isNullOrEmpty(token)) {
894 if (ChannelBinding.priority(tokenMechanism.channelBinding)
895 >= ChannelBindingMechanism.getPriority(currentSaslMechanism)) {
896 this.account.setFastToken(tokenMechanism, token);
897 Log.d(
898 Config.LOGTAG,
899 account.getJid().asBareJid()
900 + ": storing hashed token "
901 + tokenMechanism);
902 } else {
903 Log.d(
904 Config.LOGTAG,
905 account.getJid().asBareJid()
906 + ": not accepting hashed token "
907 + tokenMechanism.name()
908 + " for log in mechanism "
909 + currentSaslMechanism.getMechanism());
910 this.account.resetFastToken();
911 }
912 } else if (this.hashTokenRequest != null) {
913 Log.w(
914 Config.LOGTAG,
915 account.getJid().asBareJid()
916 + ": no response to our hashed token request "
917 + this.hashTokenRequest);
918 }
919 }
920 mXmppConnectionService.databaseBackend.updateAccount(account);
921 this.quickStartInProgress = false;
922 if (version == SaslMechanism.Version.SASL) {
923 tagReader.reset();
924 sendStartStream(false, true);
925 final Tag tag = tagReader.readTag();
926 if (tag != null && tag.isStart("stream", Namespace.STREAMS)) {
927 processStream();
928 return true;
929 } else {
930 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
931 }
932 } else {
933 return false;
934 }
935 }
936
937 private void resetOutboundStanzaQueue() {
938 synchronized (this.mStanzaQueue) {
939 final List<AbstractAcknowledgeableStanza> intermediateStanzas = new ArrayList<>();
940 if (Config.EXTENDED_SM_LOGGING) {
941 Log.d(
942 Config.LOGTAG,
943 account.getJid().asBareJid()
944 + ": stanzas sent before auth: "
945 + this.stanzasSentBeforeAuthentication);
946 }
947 for (int i = this.stanzasSentBeforeAuthentication + 1; i <= this.stanzasSent; ++i) {
948 final AbstractAcknowledgeableStanza stanza = this.mStanzaQueue.get(i);
949 if (stanza != null) {
950 intermediateStanzas.add(stanza);
951 }
952 }
953 this.mStanzaQueue.clear();
954 for (int i = 0; i < intermediateStanzas.size(); ++i) {
955 this.mStanzaQueue.put(i, intermediateStanzas.get(i));
956 }
957 this.stanzasSent = intermediateStanzas.size();
958 if (Config.EXTENDED_SM_LOGGING) {
959 Log.d(
960 Config.LOGTAG,
961 account.getJid().asBareJid()
962 + ": resetting outbound stanza queue to "
963 + this.stanzasSent);
964 }
965 }
966 }
967
968 private void processNopStreamFeatures() throws IOException {
969 final Tag tag = tagReader.readTag();
970 if (tag != null && tag.isStart("features", Namespace.STREAMS)) {
971 this.streamFeatures = tagReader.readElement(tag);
972 Log.d(
973 Config.LOGTAG,
974 account.getJid().asBareJid()
975 + ": processed NOP stream features after success: "
976 + XmlHelper.printElementNames(this.streamFeatures));
977 } else {
978 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": received " + tag);
979 Log.d(
980 Config.LOGTAG,
981 account.getJid().asBareJid()
982 + ": server did not send stream features after SASL2 success");
983 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
984 }
985 }
986
987 private void processFailure(final Element failure) throws IOException {
988 final SaslMechanism.Version version;
989 try {
990 version = SaslMechanism.Version.of(failure);
991 } catch (final IllegalArgumentException e) {
992 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
993 }
994 Log.d(Config.LOGTAG, failure.toString());
995 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
996 if (SaslMechanism.hashedToken(LoginInfo.mechanism(this.loginInfo))) {
997 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resetting token");
998 account.resetFastToken();
999 mXmppConnectionService.databaseBackend.updateAccount(account);
1000 }
1001 if (failure.hasChild("temporary-auth-failure")) {
1002 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
1003 } else if (failure.hasChild("account-disabled")) {
1004 final String text = failure.findChildContent("text");
1005 if (Strings.isNullOrEmpty(text)) {
1006 throw new StateChangingException(Account.State.UNAUTHORIZED);
1007 }
1008 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
1009 if (matcher.find()) {
1010 final HttpUrl url;
1011 try {
1012 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
1013 } catch (final IllegalArgumentException e) {
1014 throw new StateChangingException(Account.State.UNAUTHORIZED);
1015 }
1016 if (url.isHttps()) {
1017 this.redirectionUrl = url;
1018 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
1019 }
1020 }
1021 }
1022 if (SaslMechanism.hashedToken(LoginInfo.mechanism(this.loginInfo))) {
1023 Log.d(
1024 Config.LOGTAG,
1025 account.getJid().asBareJid()
1026 + ": fast authentication failed. falling back to regular authentication");
1027 authenticate();
1028 } else {
1029 throw new StateChangingException(Account.State.UNAUTHORIZED);
1030 }
1031 }
1032
1033 private static SSLSocket sslSocketOrNull(final Socket socket) {
1034 if (socket instanceof SSLSocket) {
1035 return (SSLSocket) socket;
1036 } else {
1037 return null;
1038 }
1039 }
1040
1041 private void processEnabled(final Element enabled) {
1042 final String id;
1043 if (enabled.getAttributeAsBoolean("resume")) {
1044 id = enabled.getAttribute("id");
1045 } else {
1046 id = null;
1047 }
1048 final String locationAttribute = enabled.getAttribute("location");
1049 final Resolver.Result currentResolverResult = this.currentResolverResult;
1050 final Resolver.Result location;
1051 if (Strings.isNullOrEmpty(locationAttribute) || currentResolverResult == null) {
1052 location = null;
1053 } else {
1054 location = currentResolverResult.seeOtherHost(locationAttribute);
1055 }
1056 final StreamId streamId = id == null ? null : new StreamId(id, location);
1057 if (streamId == null) {
1058 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream management enabled");
1059 } else {
1060 Log.d(
1061 Config.LOGTAG,
1062 account.getJid().asBareJid()
1063 + ": stream management enabled. resume at: "
1064 + streamId.location);
1065 }
1066 this.streamId = streamId;
1067 this.stanzasReceived = 0;
1068 this.inSmacksSession = true;
1069 final RequestPacket r = new RequestPacket();
1070 tagWriter.writeStanzaAsync(r);
1071 }
1072
1073 private void processResumed(final Element resumed) throws StateChangingException {
1074 this.inSmacksSession = true;
1075 this.isBound = true;
1076 this.tagWriter.writeStanzaAsync(new RequestPacket());
1077 lastPacketReceived = SystemClock.elapsedRealtime();
1078 final Optional<Integer> h = resumed.getOptionalIntAttribute("h");
1079 final int serverCount;
1080 if (h.isPresent()) {
1081 serverCount = h.get();
1082 } else {
1083 resetStreamId();
1084 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1085 }
1086 final ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
1087 final boolean acknowledgedMessages;
1088 synchronized (this.mStanzaQueue) {
1089 if (serverCount < stanzasSent) {
1090 Log.d(
1091 Config.LOGTAG,
1092 account.getJid().asBareJid() + ": session resumed with lost packages");
1093 stanzasSent = serverCount;
1094 } else {
1095 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": session resumed");
1096 }
1097 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
1098 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
1099 failedStanzas.add(mStanzaQueue.valueAt(i));
1100 }
1101 mStanzaQueue.clear();
1102 }
1103 if (acknowledgedMessages) {
1104 mXmppConnectionService.updateConversationUi();
1105 }
1106 Log.d(
1107 Config.LOGTAG,
1108 account.getJid().asBareJid() + ": resending " + failedStanzas.size() + " stanzas");
1109 for (final AbstractAcknowledgeableStanza packet : failedStanzas) {
1110 if (packet instanceof MessagePacket message) {
1111 mXmppConnectionService.markMessage(
1112 account,
1113 message.getTo().asBareJid(),
1114 message.getId(),
1115 Message.STATUS_UNSEND);
1116 }
1117 sendPacket(packet);
1118 }
1119 changeStatusToOnline();
1120 }
1121
1122 private void changeStatusToOnline() {
1123 Log.d(
1124 Config.LOGTAG,
1125 account.getJid().asBareJid() + ": online with resource " + account.getResource());
1126 changeStatus(Account.State.ONLINE);
1127 }
1128
1129 private void processFailed(final Element failed, final boolean sendBindRequest) {
1130 final Optional<Integer> serverCount = failed.getOptionalIntAttribute("h");
1131 if (serverCount.isPresent()) {
1132 Log.d(
1133 Config.LOGTAG,
1134 account.getJid().asBareJid()
1135 + ": resumption failed but server acknowledged stanza #"
1136 + serverCount.get());
1137 final boolean acknowledgedMessages;
1138 synchronized (this.mStanzaQueue) {
1139 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount.get());
1140 }
1141 if (acknowledgedMessages) {
1142 mXmppConnectionService.updateConversationUi();
1143 }
1144 } else {
1145 Log.d(
1146 Config.LOGTAG,
1147 account.getJid().asBareJid()
1148 + ": resumption failed ("
1149 + XmlHelper.print(failed.getChildren())
1150 + ")");
1151 }
1152 resetStreamId();
1153 if (sendBindRequest) {
1154 sendBindRequest();
1155 }
1156 }
1157
1158 private boolean acknowledgeStanzaUpTo(final int serverCount) {
1159 if (serverCount > stanzasSent) {
1160 Log.e(
1161 Config.LOGTAG,
1162 "server acknowledged more stanzas than we sent. serverCount="
1163 + serverCount
1164 + ", ourCount="
1165 + stanzasSent);
1166 }
1167 boolean acknowledgedMessages = false;
1168 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1169 if (serverCount >= mStanzaQueue.keyAt(i)) {
1170 if (Config.EXTENDED_SM_LOGGING) {
1171 Log.d(
1172 Config.LOGTAG,
1173 account.getJid().asBareJid()
1174 + ": server acknowledged stanza #"
1175 + mStanzaQueue.keyAt(i));
1176 }
1177 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1178 if (stanza instanceof MessagePacket packet && acknowledgedListener != null) {
1179 final String id = packet.getId();
1180 final Jid to = packet.getTo();
1181 if (id != null && to != null) {
1182 acknowledgedMessages |=
1183 acknowledgedListener.onMessageAcknowledged(account, to, id);
1184 }
1185 }
1186 mStanzaQueue.removeAt(i);
1187 i--;
1188 }
1189 }
1190 return acknowledgedMessages;
1191 }
1192
1193 private @NonNull Element processPacket(final Tag currentTag, final int packetType)
1194 throws IOException {
1195 final Element element =
1196 switch (packetType) {
1197 case PACKET_IQ -> new IqPacket();
1198 case PACKET_MESSAGE -> new MessagePacket();
1199 case PACKET_PRESENCE -> new PresencePacket();
1200 default -> throw new AssertionError("Should never encounter invalid type");
1201 };
1202 element.setAttributes(currentTag.getAttributes());
1203 Tag nextTag = tagReader.readTag();
1204 if (nextTag == null) {
1205 throw new IOException("interrupted mid tag");
1206 }
1207 while (!nextTag.isEnd(element.getName())) {
1208 if (!nextTag.isNo()) {
1209 element.addChild(tagReader.readElement(nextTag));
1210 }
1211 nextTag = tagReader.readTag();
1212 if (nextTag == null) {
1213 throw new IOException("interrupted mid tag");
1214 }
1215 }
1216 if (stanzasReceived == Integer.MAX_VALUE) {
1217 resetStreamId();
1218 throw new IOException("time to restart the session. cant handle >2 billion pcks");
1219 }
1220 if (inSmacksSession) {
1221 ++stanzasReceived;
1222 } else if (features.sm()) {
1223 Log.d(
1224 Config.LOGTAG,
1225 account.getJid().asBareJid()
1226 + ": not counting stanza("
1227 + element.getClass().getSimpleName()
1228 + "). Not in smacks session.");
1229 }
1230 lastPacketReceived = SystemClock.elapsedRealtime();
1231 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
1232 Log.d(Config.LOGTAG, "[background stanza] " + element);
1233 }
1234 if (element instanceof IqPacket
1235 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
1236 && element.hasChild("jingle", Namespace.JINGLE)) {
1237 return JinglePacket.upgrade((IqPacket) element);
1238 } else {
1239 return element;
1240 }
1241 }
1242
1243 private void processIq(final Tag currentTag) throws IOException {
1244 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
1245 if (!packet.valid()) {
1246 Log.e(
1247 Config.LOGTAG,
1248 "encountered invalid iq from='"
1249 + packet.getFrom()
1250 + "' to='"
1251 + packet.getTo()
1252 + "'");
1253 return;
1254 }
1255 if (Thread.currentThread().isInterrupted()) {
1256 Log.d(
1257 Config.LOGTAG,
1258 account.getJid().asBareJid() + "Not processing iq. Thread was interrupted");
1259 return;
1260 }
1261 if (packet instanceof JinglePacket jinglePacket && isBound) {
1262 if (this.jingleListener != null) {
1263 this.jingleListener.onJinglePacketReceived(account, jinglePacket);
1264 }
1265 } else {
1266 final OnIqPacketReceived callback = getIqPacketReceivedCallback(packet);
1267 if (callback == null) {
1268 Log.d(
1269 Config.LOGTAG,
1270 account.getJid().asBareJid().toString()
1271 + ": no callback registered for IQ from "
1272 + packet.getFrom());
1273 return;
1274 }
1275 try {
1276 callback.onIqPacketReceived(account, packet);
1277 } catch (final StateChangingError error) {
1278 throw new StateChangingException(error.state);
1279 }
1280 }
1281 }
1282
1283 private OnIqPacketReceived getIqPacketReceivedCallback(final IqPacket stanza)
1284 throws StateChangingException {
1285 final boolean isRequest =
1286 stanza.getType() == IqPacket.TYPE.GET || stanza.getType() == IqPacket.TYPE.SET;
1287 if (isRequest) {
1288 if (isBound) {
1289 return this.unregisteredIqListener;
1290 } else {
1291 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1292 }
1293 } else {
1294 synchronized (this.packetCallbacks) {
1295 final var pair = packetCallbacks.get(stanza.getId());
1296 if (pair == null) {
1297 return null;
1298 }
1299 if (pair.first.toServer(account)) {
1300 if (stanza.fromServer(account)) {
1301 packetCallbacks.remove(stanza.getId());
1302 return pair.second;
1303 } else {
1304 Log.e(
1305 Config.LOGTAG,
1306 account.getJid().asBareJid().toString()
1307 + ": ignoring spoofed iq packet");
1308 }
1309 } else {
1310 if (stanza.getFrom() != null && stanza.getFrom().equals(pair.first.getTo())) {
1311 packetCallbacks.remove(stanza.getId());
1312 return pair.second;
1313 } else {
1314 Log.e(
1315 Config.LOGTAG,
1316 account.getJid().asBareJid().toString()
1317 + ": ignoring spoofed iq packet");
1318 }
1319 }
1320 }
1321 }
1322 return null;
1323 }
1324
1325 private void processMessage(final Tag currentTag) throws IOException {
1326 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
1327 if (!packet.valid()) {
1328 Log.e(
1329 Config.LOGTAG,
1330 "encountered invalid message from='"
1331 + packet.getFrom()
1332 + "' to='"
1333 + packet.getTo()
1334 + "'");
1335 return;
1336 }
1337 if (Thread.currentThread().isInterrupted()) {
1338 Log.d(
1339 Config.LOGTAG,
1340 account.getJid().asBareJid()
1341 + "Not processing message. Thread was interrupted");
1342 return;
1343 }
1344 this.messageListener.onMessagePacketReceived(account, packet);
1345 }
1346
1347 private void processPresence(final Tag currentTag) throws IOException {
1348 final PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
1349 if (!packet.valid()) {
1350 Log.e(
1351 Config.LOGTAG,
1352 "encountered invalid presence from='"
1353 + packet.getFrom()
1354 + "' to='"
1355 + packet.getTo()
1356 + "'");
1357 return;
1358 }
1359 if (Thread.currentThread().isInterrupted()) {
1360 Log.d(
1361 Config.LOGTAG,
1362 account.getJid().asBareJid()
1363 + "Not processing presence. Thread was interrupted");
1364 return;
1365 }
1366 this.presenceListener.onPresencePacketReceived(account, packet);
1367 }
1368
1369 private void sendStartTLS() throws IOException {
1370 final Tag startTLS = Tag.empty("starttls");
1371 startTLS.setAttribute("xmlns", Namespace.TLS);
1372 tagWriter.writeTag(startTLS);
1373 }
1374
1375 private void switchOverToTls() throws XmlPullParserException, IOException {
1376 tagReader.readTag();
1377 final Socket socket = this.socket;
1378 final SSLSocket sslSocket = upgradeSocketToTls(socket);
1379 this.socket = sslSocket;
1380 this.tagReader.setInputStream(sslSocket.getInputStream());
1381 this.tagWriter.setOutputStream(sslSocket.getOutputStream());
1382 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
1383 final boolean quickStart;
1384 try {
1385 quickStart = establishStream(SSLSockets.version(sslSocket));
1386 } catch (final InterruptedException e) {
1387 return;
1388 }
1389 if (quickStart) {
1390 this.quickStartInProgress = true;
1391 }
1392 features.encryptionEnabled = true;
1393 final Tag tag = tagReader.readTag();
1394 if (tag != null && tag.isStart("stream", Namespace.STREAMS)) {
1395 SSLSockets.log(account, sslSocket);
1396 processStream();
1397 } else {
1398 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
1399 }
1400 sslSocket.close();
1401 }
1402
1403 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
1404 final SSLSocketFactory sslSocketFactory;
1405 try {
1406 sslSocketFactory = getSSLSocketFactory();
1407 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
1408 throw new StateChangingException(Account.State.TLS_ERROR);
1409 }
1410 final InetAddress address = socket.getInetAddress();
1411 final SSLSocket sslSocket =
1412 (SSLSocket)
1413 sslSocketFactory.createSocket(
1414 socket, address.getHostAddress(), socket.getPort(), true);
1415 SSLSockets.setSecurity(sslSocket);
1416 SSLSockets.setHostname(sslSocket, IDN.toASCII(account.getServer()));
1417 SSLSockets.setApplicationProtocol(sslSocket, "xmpp-client");
1418 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
1419 try {
1420 if (!xmppDomainVerifier.verify(
1421 account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
1422 Log.d(
1423 Config.LOGTAG,
1424 account.getJid().asBareJid()
1425 + ": TLS certificate domain verification failed");
1426 FileBackend.close(sslSocket);
1427 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
1428 }
1429 } catch (final SSLPeerUnverifiedException e) {
1430 FileBackend.close(sslSocket);
1431 throw new StateChangingException(Account.State.TLS_ERROR);
1432 }
1433 return sslSocket;
1434 }
1435
1436 private void processStreamFeatures(final Tag currentTag) throws IOException {
1437 this.streamFeatures = tagReader.readElement(currentTag);
1438 final boolean isSecure = isSecure();
1439 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
1440 if (this.quickStartInProgress) {
1441 if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1442 Log.d(
1443 Config.LOGTAG,
1444 account.getJid().asBareJid()
1445 + ": quick start in progress. ignoring features: "
1446 + XmlHelper.printElementNames(this.streamFeatures));
1447 if (SaslMechanism.hashedToken(LoginInfo.mechanism(this.loginInfo))) {
1448 return;
1449 }
1450 if (isFastTokenAvailable(
1451 this.streamFeatures.findChild("authentication", Namespace.SASL_2))) {
1452 Log.d(
1453 Config.LOGTAG,
1454 account.getJid().asBareJid()
1455 + ": fast token available; resetting quick start");
1456 account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, false);
1457 mXmppConnectionService.databaseBackend.updateAccount(account);
1458 }
1459 return;
1460 }
1461 Log.d(
1462 Config.LOGTAG,
1463 account.getJid().asBareJid()
1464 + ": server lost support for SASL 2. quick start not possible");
1465 this.account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, false);
1466 mXmppConnectionService.databaseBackend.updateAccount(account);
1467 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1468 }
1469 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
1470 && !features.encryptionEnabled) {
1471 sendStartTLS();
1472 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1473 && account.isOptionSet(Account.OPTION_REGISTER)) {
1474 if (isSecure) {
1475 register();
1476 } else {
1477 Log.d(
1478 Config.LOGTAG,
1479 account.getJid().asBareJid()
1480 + ": unable to find STARTTLS for registration process "
1481 + XmlHelper.printElementNames(this.streamFeatures));
1482 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1483 }
1484 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1485 && account.isOptionSet(Account.OPTION_REGISTER)) {
1486 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
1487 } else if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)
1488 && shouldAuthenticate
1489 && isSecure) {
1490 authenticate(SaslMechanism.Version.SASL_2);
1491 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
1492 && shouldAuthenticate
1493 && isSecure) {
1494 authenticate(SaslMechanism.Version.SASL);
1495 } else if (this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT)
1496 && isSecure
1497 && LoginInfo.isSuccess(loginInfo)
1498 && streamId != null
1499 && !inSmacksSession) {
1500 if (Config.EXTENDED_SM_LOGGING) {
1501 Log.d(
1502 Config.LOGTAG,
1503 account.getJid().asBareJid()
1504 + ": resuming after stanza #"
1505 + stanzasReceived);
1506 }
1507 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1508 this.mSmCatchupMessageCounter.set(0);
1509 this.mWaitingForSmCatchup.set(true);
1510 this.tagWriter.writeStanzaAsync(resume);
1511 } else if (needsBinding) {
1512 if (this.streamFeatures.hasChild("bind", Namespace.BIND)
1513 && isSecure
1514 && LoginInfo.isSuccess(loginInfo)) {
1515 sendBindRequest();
1516 } else {
1517 Log.d(
1518 Config.LOGTAG,
1519 account.getJid().asBareJid()
1520 + ": unable to find bind feature "
1521 + XmlHelper.printElementNames(this.streamFeatures));
1522 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1523 }
1524 } else {
1525 Log.d(
1526 Config.LOGTAG,
1527 account.getJid().asBareJid()
1528 + ": received NOP stream features: "
1529 + XmlHelper.printElementNames(this.streamFeatures));
1530 }
1531 }
1532
1533 private void authenticate() throws IOException {
1534 final boolean isSecure = isSecure();
1535 if (isSecure && this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1536 authenticate(SaslMechanism.Version.SASL_2);
1537 } else if (isSecure && this.streamFeatures.hasChild("mechanisms", Namespace.SASL)) {
1538 authenticate(SaslMechanism.Version.SASL);
1539 } else {
1540 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1541 }
1542 }
1543
1544 private boolean isSecure() {
1545 return features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
1546 }
1547
1548 private void authenticate(final SaslMechanism.Version version) throws IOException {
1549 final Element authElement;
1550 if (version == SaslMechanism.Version.SASL) {
1551 authElement = this.streamFeatures.findChild("mechanisms", Namespace.SASL);
1552 } else {
1553 authElement = this.streamFeatures.findChild("authentication", Namespace.SASL_2);
1554 }
1555 final Collection<String> mechanisms = SaslMechanism.mechanisms(authElement);
1556 final Element cbElement =
1557 this.streamFeatures.findChild("sasl-channel-binding", Namespace.CHANNEL_BINDING);
1558 final Collection<ChannelBinding> channelBindings = ChannelBinding.of(cbElement);
1559 final SaslMechanism.Factory factory = new SaslMechanism.Factory(account);
1560 final SaslMechanism saslMechanism =
1561 factory.of(mechanisms, channelBindings, version, SSLSockets.version(this.socket));
1562 this.validate(saslMechanism, mechanisms);
1563 final boolean quickStartAvailable;
1564 final String firstMessage =
1565 saslMechanism.getClientFirstMessage(sslSocketOrNull(this.socket));
1566 final boolean usingFast = SaslMechanism.hashedToken(saslMechanism);
1567 final Element authenticate;
1568 if (version == SaslMechanism.Version.SASL) {
1569 authenticate = new Element("auth", Namespace.SASL);
1570 if (!Strings.isNullOrEmpty(firstMessage)) {
1571 authenticate.setContent(firstMessage);
1572 }
1573 quickStartAvailable = false;
1574 this.loginInfo = new LoginInfo(saslMechanism, version, Collections.emptyList());
1575 } else if (version == SaslMechanism.Version.SASL_2) {
1576 final Element inline = authElement.findChild("inline", Namespace.SASL_2);
1577 final boolean sm = inline != null && inline.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1578 final HashedToken.Mechanism hashTokenRequest;
1579 if (usingFast) {
1580 hashTokenRequest = null;
1581 } else {
1582 final Element fast =
1583 inline == null ? null : inline.findChild("fast", Namespace.FAST);
1584 final Collection<String> fastMechanisms = SaslMechanism.mechanisms(fast);
1585 hashTokenRequest =
1586 HashedToken.Mechanism.best(fastMechanisms, SSLSockets.version(this.socket));
1587 }
1588 final Collection<String> bindFeatures = Bind2.features(inline);
1589 quickStartAvailable =
1590 sm
1591 && bindFeatures != null
1592 && bindFeatures.containsAll(Bind2.QUICKSTART_FEATURES);
1593 if (bindFeatures != null) {
1594 try {
1595 mXmppConnectionService.restoredFromDatabaseLatch.await();
1596 } catch (final InterruptedException e) {
1597 Log.d(
1598 Config.LOGTAG,
1599 account.getJid().asBareJid()
1600 + ": interrupted while waiting for DB restore during SASL2 bind");
1601 return;
1602 }
1603 }
1604 this.loginInfo = new LoginInfo(saslMechanism, version, bindFeatures);
1605 this.hashTokenRequest = hashTokenRequest;
1606 authenticate =
1607 generateAuthenticationRequest(
1608 firstMessage, usingFast, hashTokenRequest, bindFeatures, sm);
1609 } else {
1610 throw new AssertionError("Missing implementation for " + version);
1611 }
1612
1613 if (account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, quickStartAvailable)) {
1614 mXmppConnectionService.databaseBackend.updateAccount(account);
1615 }
1616
1617 Log.d(
1618 Config.LOGTAG,
1619 account.getJid().toString()
1620 + ": Authenticating with "
1621 + version
1622 + "/"
1623 + LoginInfo.mechanism(this.loginInfo).getMechanism());
1624 authenticate.setAttribute("mechanism", LoginInfo.mechanism(this.loginInfo).getMechanism());
1625 synchronized (this.mStanzaQueue) {
1626 this.stanzasSentBeforeAuthentication = this.stanzasSent;
1627 tagWriter.writeElement(authenticate);
1628 }
1629 }
1630
1631 private static boolean isFastTokenAvailable(final Element authentication) {
1632 final Element inline = authentication == null ? null : authentication.findChild("inline");
1633 return inline != null && inline.hasChild("fast", Namespace.FAST);
1634 }
1635
1636 private void validate(
1637 final @Nullable SaslMechanism saslMechanism, Collection<String> mechanisms)
1638 throws StateChangingException {
1639 if (saslMechanism == null) {
1640 Log.d(
1641 Config.LOGTAG,
1642 account.getJid().asBareJid()
1643 + ": unable to find supported SASL mechanism in "
1644 + mechanisms);
1645 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1646 }
1647 if (SaslMechanism.hashedToken(saslMechanism)) {
1648 return;
1649 }
1650 final int pinnedMechanism = account.getPinnedMechanismPriority();
1651 if (pinnedMechanism > saslMechanism.getPriority()) {
1652 Log.e(
1653 Config.LOGTAG,
1654 "Auth failed. Authentication mechanism "
1655 + saslMechanism.getMechanism()
1656 + " has lower priority ("
1657 + saslMechanism.getPriority()
1658 + ") than pinned priority ("
1659 + pinnedMechanism
1660 + "). Possible downgrade attack?");
1661 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1662 }
1663 }
1664
1665 private Element generateAuthenticationRequest(
1666 final String firstMessage, final boolean usingFast) {
1667 return generateAuthenticationRequest(
1668 firstMessage, usingFast, null, Bind2.QUICKSTART_FEATURES, true);
1669 }
1670
1671 private Element generateAuthenticationRequest(
1672 final String firstMessage,
1673 final boolean usingFast,
1674 final HashedToken.Mechanism hashedTokenRequest,
1675 final Collection<String> bind,
1676 final boolean inlineStreamManagement) {
1677 final Element authenticate = new Element("authenticate", Namespace.SASL_2);
1678 if (!Strings.isNullOrEmpty(firstMessage)) {
1679 authenticate.addChild("initial-response").setContent(firstMessage);
1680 }
1681 final Element userAgent = authenticate.addChild("user-agent");
1682 userAgent.setAttribute("id", AccountUtils.publicDeviceId(account));
1683 userAgent
1684 .addChild("software")
1685 .setContent(mXmppConnectionService.getString(R.string.app_name));
1686 if (!PhoneHelper.isEmulator()) {
1687 userAgent
1688 .addChild("device")
1689 .setContent(String.format("%s %s", Build.MANUFACTURER, Build.MODEL));
1690 }
1691 // do not include bind if 'inlineStreamManagement' is missing and we have a streamId
1692 // (because we would rather just do a normal SM/resume)
1693 final boolean mayAttemptBind = streamId == null || inlineStreamManagement;
1694 if (bind != null && mayAttemptBind) {
1695 authenticate.addChild(generateBindRequest(bind));
1696 }
1697 if (inlineStreamManagement && streamId != null) {
1698 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1699 this.mSmCatchupMessageCounter.set(0);
1700 this.mWaitingForSmCatchup.set(true);
1701 authenticate.addChild(resume);
1702 }
1703 if (hashedTokenRequest != null) {
1704 authenticate
1705 .addChild("request-token", Namespace.FAST)
1706 .setAttribute("mechanism", hashedTokenRequest.name());
1707 }
1708 if (usingFast) {
1709 authenticate.addChild("fast", Namespace.FAST);
1710 }
1711 return authenticate;
1712 }
1713
1714 private Element generateBindRequest(final Collection<String> bindFeatures) {
1715 Log.d(Config.LOGTAG, "inline bind features: " + bindFeatures);
1716 final Element bind = new Element("bind", Namespace.BIND2);
1717 bind.addChild("tag").setContent(mXmppConnectionService.getString(R.string.app_name));
1718 if (bindFeatures.contains(Namespace.CARBONS)) {
1719 bind.addChild("enable", Namespace.CARBONS);
1720 }
1721 if (bindFeatures.contains(Namespace.STREAM_MANAGEMENT)) {
1722 bind.addChild(new EnablePacket());
1723 }
1724 return bind;
1725 }
1726
1727 private void register() {
1728 final String preAuth = account.getKey(Account.KEY_PRE_AUTH_REGISTRATION_TOKEN);
1729 if (preAuth != null && features.invite()) {
1730 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1731 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1732 sendUnmodifiedIqPacket(
1733 preAuthRequest,
1734 (account, response) -> {
1735 if (response.getType() == IqPacket.TYPE.RESULT) {
1736 sendRegistryRequest();
1737 } else {
1738 final String error = response.getErrorCondition();
1739 Log.d(
1740 Config.LOGTAG,
1741 account.getJid().asBareJid()
1742 + ": failed to pre auth. "
1743 + error);
1744 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1745 }
1746 },
1747 true);
1748 } else {
1749 sendRegistryRequest();
1750 }
1751 }
1752
1753 private void sendRegistryRequest() {
1754 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1755 register.query(Namespace.REGISTER);
1756 register.setTo(account.getDomain());
1757 sendUnmodifiedIqPacket(
1758 register,
1759 (account, packet) -> {
1760 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1761 return;
1762 }
1763 if (packet.getType() == IqPacket.TYPE.ERROR) {
1764 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1765 }
1766 final Element query = packet.query(Namespace.REGISTER);
1767 if (query.hasChild("username") && (query.hasChild("password"))) {
1768 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1769 final Element username =
1770 new Element("username").setContent(account.getUsername());
1771 final Element password =
1772 new Element("password").setContent(account.getPassword());
1773 register1.query(Namespace.REGISTER).addChild(username);
1774 register1.query().addChild(password);
1775 register1.setFrom(account.getJid().asBareJid());
1776 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1777 } else if (query.hasChild("x", Namespace.DATA)) {
1778 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1779 final Element blob = query.findChild("data", "urn:xmpp:bob");
1780 final String id = packet.getId();
1781 InputStream is;
1782 if (blob != null) {
1783 try {
1784 final String base64Blob = blob.getContent();
1785 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1786 is = new ByteArrayInputStream(strBlob);
1787 } catch (Exception e) {
1788 is = null;
1789 }
1790 } else {
1791 final boolean useTor =
1792 mXmppConnectionService.useTorToConnect() || account.isOnion();
1793 try {
1794 final String url = data.getValue("url");
1795 final String fallbackUrl = data.getValue("captcha-fallback-url");
1796 if (url != null) {
1797 is = HttpConnectionManager.open(url, useTor);
1798 } else if (fallbackUrl != null) {
1799 is = HttpConnectionManager.open(fallbackUrl, useTor);
1800 } else {
1801 is = null;
1802 }
1803 } catch (final IOException e) {
1804 Log.d(
1805 Config.LOGTAG,
1806 account.getJid().asBareJid() + ": unable to fetch captcha",
1807 e);
1808 is = null;
1809 }
1810 }
1811
1812 if (is != null) {
1813 Bitmap captcha = BitmapFactory.decodeStream(is);
1814 try {
1815 if (mXmppConnectionService.displayCaptchaRequest(
1816 account, id, data, captcha)) {
1817 return;
1818 }
1819 } catch (Exception e) {
1820 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1821 }
1822 }
1823 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1824 } else if (query.hasChild("instructions")
1825 || query.hasChild("x", Namespace.OOB)) {
1826 final String instructions = query.findChildContent("instructions");
1827 final Element oob = query.findChild("x", Namespace.OOB);
1828 final String url = oob == null ? null : oob.findChildContent("url");
1829 if (url != null) {
1830 setAccountCreationFailed(url);
1831 } else if (instructions != null) {
1832 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1833 if (matcher.find()) {
1834 setAccountCreationFailed(
1835 instructions.substring(matcher.start(), matcher.end()));
1836 }
1837 }
1838 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1839 }
1840 },
1841 true);
1842 }
1843
1844 private void setAccountCreationFailed(final String url) {
1845 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1846 if (httpUrl != null && httpUrl.isHttps()) {
1847 this.redirectionUrl = httpUrl;
1848 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1849 }
1850 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1851 }
1852
1853 public HttpUrl getRedirectionUrl() {
1854 return this.redirectionUrl;
1855 }
1856
1857 public void resetEverything() {
1858 resetAttemptCount(true);
1859 resetStreamId();
1860 clearIqCallbacks();
1861 synchronized (this.mStanzaQueue) {
1862 this.stanzasSent = 0;
1863 this.mStanzaQueue.clear();
1864 }
1865 this.redirectionUrl = null;
1866 synchronized (this.disco) {
1867 disco.clear();
1868 }
1869 synchronized (this.commands) {
1870 this.commands.clear();
1871 }
1872 this.loginInfo = null;
1873 }
1874
1875 private void sendBindRequest() {
1876 try {
1877 mXmppConnectionService.restoredFromDatabaseLatch.await();
1878 } catch (InterruptedException e) {
1879 Log.d(
1880 Config.LOGTAG,
1881 account.getJid().asBareJid()
1882 + ": interrupted while waiting for DB restore during bind");
1883 return;
1884 }
1885 clearIqCallbacks();
1886 if (account.getJid().isBareJid()) {
1887 account.setResource(this.createNewResource());
1888 } else {
1889 fixResource(mXmppConnectionService, account);
1890 }
1891 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1892 final String resource =
1893 Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1894 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1895 this.sendUnmodifiedIqPacket(
1896 iq,
1897 (account, packet) -> {
1898 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1899 return;
1900 }
1901 final Element bind = packet.findChild("bind");
1902 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1903 isBound = true;
1904 final Element jid = bind.findChild("jid");
1905 if (jid != null && jid.getContent() != null) {
1906 try {
1907 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1908 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1909 Log.d(
1910 Config.LOGTAG,
1911 account.getJid().asBareJid()
1912 + ": server tried to re-assign domain to "
1913 + assignedJid.getDomain());
1914 throw new StateChangingError(Account.State.BIND_FAILURE);
1915 }
1916 if (account.setJid(assignedJid)) {
1917 Log.d(
1918 Config.LOGTAG,
1919 account.getJid().asBareJid()
1920 + ": jid changed during bind. updating database");
1921 mXmppConnectionService.databaseBackend.updateAccount(account);
1922 }
1923 if (streamFeatures.hasChild("session")
1924 && !streamFeatures
1925 .findChild("session")
1926 .hasChild("optional")) {
1927 sendStartSession();
1928 } else {
1929 final boolean waitForDisco = enableStreamManagement();
1930 sendPostBindInitialization(waitForDisco, false);
1931 }
1932 return;
1933 } catch (final IllegalArgumentException e) {
1934 Log.d(
1935 Config.LOGTAG,
1936 account.getJid().asBareJid()
1937 + ": server reported invalid jid ("
1938 + jid.getContent()
1939 + ") on bind");
1940 }
1941 } else {
1942 Log.d(
1943 Config.LOGTAG,
1944 account.getJid()
1945 + ": disconnecting because of bind failure. (no jid)");
1946 }
1947 } else {
1948 Log.d(
1949 Config.LOGTAG,
1950 account.getJid()
1951 + ": disconnecting because of bind failure ("
1952 + packet);
1953 }
1954 final Element error = packet.findChild("error");
1955 if (packet.getType() == IqPacket.TYPE.ERROR
1956 && error != null
1957 && error.hasChild("conflict")) {
1958 account.setResource(createNewResource());
1959 }
1960 throw new StateChangingError(Account.State.BIND_FAILURE);
1961 },
1962 true);
1963 }
1964
1965 private void clearIqCallbacks() {
1966 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1967 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1968 synchronized (this.packetCallbacks) {
1969 if (this.packetCallbacks.size() == 0) {
1970 return;
1971 }
1972 Log.d(
1973 Config.LOGTAG,
1974 account.getJid().asBareJid()
1975 + ": clearing "
1976 + this.packetCallbacks.size()
1977 + " iq callbacks");
1978 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator =
1979 this.packetCallbacks.values().iterator();
1980 while (iterator.hasNext()) {
1981 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1982 callbacks.add(entry.second);
1983 iterator.remove();
1984 }
1985 }
1986 for (OnIqPacketReceived callback : callbacks) {
1987 try {
1988 callback.onIqPacketReceived(account, failurePacket);
1989 } catch (StateChangingError error) {
1990 Log.d(
1991 Config.LOGTAG,
1992 account.getJid().asBareJid()
1993 + ": caught StateChangingError("
1994 + error.state.toString()
1995 + ") while clearing callbacks");
1996 // ignore
1997 }
1998 }
1999 Log.d(
2000 Config.LOGTAG,
2001 account.getJid().asBareJid()
2002 + ": done clearing iq callbacks. "
2003 + this.packetCallbacks.size()
2004 + " left");
2005 }
2006
2007 public void sendDiscoTimeout() {
2008 if (mWaitForDisco.compareAndSet(true, false)) {
2009 Log.d(
2010 Config.LOGTAG,
2011 account.getJid().asBareJid() + ": finalizing bind after disco timeout");
2012 finalizeBind();
2013 }
2014 }
2015
2016 private void sendStartSession() {
2017 Log.d(
2018 Config.LOGTAG,
2019 account.getJid().asBareJid() + ": sending legacy session to outdated server");
2020 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
2021 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
2022 this.sendUnmodifiedIqPacket(
2023 startSession,
2024 (account, packet) -> {
2025 if (packet.getType() == IqPacket.TYPE.RESULT) {
2026 final boolean waitForDisco = enableStreamManagement();
2027 sendPostBindInitialization(waitForDisco, false);
2028 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2029 throw new StateChangingError(Account.State.SESSION_FAILURE);
2030 }
2031 },
2032 true);
2033 }
2034
2035 private boolean enableStreamManagement() {
2036 final boolean streamManagement =
2037 this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT);
2038 if (streamManagement) {
2039 synchronized (this.mStanzaQueue) {
2040 final EnablePacket enable = new EnablePacket();
2041 tagWriter.writeStanzaAsync(enable);
2042 stanzasSent = 0;
2043 mStanzaQueue.clear();
2044 }
2045 return true;
2046 } else {
2047 return false;
2048 }
2049 }
2050
2051 private void sendPostBindInitialization(
2052 final boolean waitForDisco, final boolean carbonsEnabled) {
2053 features.carbonsEnabled = carbonsEnabled;
2054 features.blockListRequested = false;
2055 synchronized (this.disco) {
2056 this.disco.clear();
2057 }
2058 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
2059 mPendingServiceDiscoveries.set(0);
2060 mWaitForDisco.set(waitForDisco);
2061 lastDiscoStarted = SystemClock.elapsedRealtime();
2062 mXmppConnectionService.scheduleWakeUpCall(
2063 Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
2064 final Element caps = streamFeatures.findChild("c");
2065 final String hash = caps == null ? null : caps.getAttribute("hash");
2066 final String ver = caps == null ? null : caps.getAttribute("ver");
2067 ServiceDiscoveryResult discoveryResult = null;
2068 if (hash != null && ver != null) {
2069 discoveryResult =
2070 mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
2071 }
2072 final boolean requestDiscoItemsFirst =
2073 !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
2074 if (requestDiscoItemsFirst) {
2075 sendServiceDiscoveryItems(account.getDomain());
2076 }
2077 if (discoveryResult == null) {
2078 sendServiceDiscoveryInfo(account.getDomain());
2079 } else {
2080 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
2081 disco.put(account.getDomain(), discoveryResult);
2082 }
2083 discoverMamPreferences();
2084 sendServiceDiscoveryInfo(account.getJid().asBareJid());
2085 if (!requestDiscoItemsFirst) {
2086 sendServiceDiscoveryItems(account.getDomain());
2087 }
2088
2089 if (!mWaitForDisco.get()) {
2090 finalizeBind();
2091 }
2092 this.lastSessionStarted = SystemClock.elapsedRealtime();
2093 }
2094
2095 private void sendServiceDiscoveryInfo(final Jid jid) {
2096 mPendingServiceDiscoveries.incrementAndGet();
2097 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2098 iq.setTo(jid);
2099 iq.query("http://jabber.org/protocol/disco#info");
2100 this.sendIqPacket(
2101 iq,
2102 (account, packet) -> {
2103 if (packet.getType() == IqPacket.TYPE.RESULT) {
2104 boolean advancedStreamFeaturesLoaded;
2105 synchronized (XmppConnection.this.disco) {
2106 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
2107 if (jid.equals(account.getDomain())) {
2108 mXmppConnectionService.databaseBackend.insertDiscoveryResult(
2109 result);
2110 }
2111 disco.put(jid, result);
2112 advancedStreamFeaturesLoaded =
2113 disco.containsKey(account.getDomain())
2114 && disco.containsKey(account.getJid().asBareJid());
2115 }
2116 if (advancedStreamFeaturesLoaded
2117 && (jid.equals(account.getDomain())
2118 || jid.equals(account.getJid().asBareJid()))) {
2119 enableAdvancedStreamFeatures();
2120 }
2121 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
2122 Log.d(
2123 Config.LOGTAG,
2124 account.getJid().asBareJid()
2125 + ": could not query disco info for "
2126 + jid.toString());
2127 final boolean serverOrAccount =
2128 jid.equals(account.getDomain())
2129 || jid.equals(account.getJid().asBareJid());
2130 final boolean advancedStreamFeaturesLoaded;
2131 if (serverOrAccount) {
2132 synchronized (XmppConnection.this.disco) {
2133 disco.put(jid, ServiceDiscoveryResult.empty());
2134 advancedStreamFeaturesLoaded =
2135 disco.containsKey(account.getDomain())
2136 && disco.containsKey(account.getJid().asBareJid());
2137 }
2138 } else {
2139 advancedStreamFeaturesLoaded = false;
2140 }
2141 if (advancedStreamFeaturesLoaded) {
2142 enableAdvancedStreamFeatures();
2143 }
2144 }
2145 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2146 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2147 && mWaitForDisco.compareAndSet(true, false)) {
2148 finalizeBind();
2149 }
2150 }
2151 });
2152 }
2153
2154 private void discoverMamPreferences() {
2155 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2156 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
2157 sendIqPacket(
2158 request,
2159 (account, response) -> {
2160 if (response.getType() == IqPacket.TYPE.RESULT) {
2161 Element prefs =
2162 response.findChild(
2163 "prefs", MessageArchiveService.Version.MAM_2.namespace);
2164 isMamPreferenceAlways =
2165 "always"
2166 .equals(
2167 prefs == null
2168 ? null
2169 : prefs.getAttribute("default"));
2170 }
2171 });
2172 }
2173
2174 private void discoverCommands() {
2175 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2176 request.setTo(account.getDomain());
2177 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
2178 sendIqPacket(
2179 request,
2180 (account, response) -> {
2181 if (response.getType() == IqPacket.TYPE.RESULT) {
2182 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
2183 if (query == null) {
2184 return;
2185 }
2186 final HashMap<String, Jid> commands = new HashMap<>();
2187 for (final Element child : query.getChildren()) {
2188 if ("item".equals(child.getName())) {
2189 final String node = child.getAttribute("node");
2190 final Jid jid = child.getAttributeAsJid("jid");
2191 if (node != null && jid != null) {
2192 commands.put(node, jid);
2193 }
2194 }
2195 }
2196 synchronized (this.commands) {
2197 this.commands.clear();
2198 this.commands.putAll(commands);
2199 }
2200 }
2201 });
2202 }
2203
2204 public boolean isMamPreferenceAlways() {
2205 return isMamPreferenceAlways;
2206 }
2207
2208 private void finalizeBind() {
2209 this.offlineMessagesRetrieved = false;
2210 if (bindListener != null) {
2211 bindListener.onBind(account);
2212 }
2213 changeStatusToOnline();
2214 }
2215
2216 private void enableAdvancedStreamFeatures() {
2217 if (getFeatures().blocking() && !features.blockListRequested) {
2218 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
2219 this.sendIqPacket(
2220 getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
2221 }
2222 for (final OnAdvancedStreamFeaturesLoaded listener :
2223 advancedStreamFeaturesLoadedListeners) {
2224 listener.onAdvancedStreamFeaturesAvailable(account);
2225 }
2226 if (getFeatures().carbons() && !features.carbonsEnabled) {
2227 sendEnableCarbons();
2228 }
2229 if (getFeatures().commands()) {
2230 discoverCommands();
2231 }
2232 }
2233
2234 private void sendServiceDiscoveryItems(final Jid server) {
2235 mPendingServiceDiscoveries.incrementAndGet();
2236 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2237 iq.setTo(server.getDomain());
2238 iq.query("http://jabber.org/protocol/disco#items");
2239 this.sendIqPacket(
2240 iq,
2241 (account, packet) -> {
2242 if (packet.getType() == IqPacket.TYPE.RESULT) {
2243 final HashSet<Jid> items = new HashSet<>();
2244 final List<Element> elements = packet.query().getChildren();
2245 for (final Element element : elements) {
2246 if (element.getName().equals("item")) {
2247 final Jid jid =
2248 InvalidJid.getNullForInvalid(
2249 element.getAttributeAsJid("jid"));
2250 if (jid != null && !jid.equals(account.getDomain())) {
2251 items.add(jid);
2252 }
2253 }
2254 }
2255 for (Jid jid : items) {
2256 sendServiceDiscoveryInfo(jid);
2257 }
2258 } else {
2259 Log.d(
2260 Config.LOGTAG,
2261 account.getJid().asBareJid()
2262 + ": could not query disco items of "
2263 + server);
2264 }
2265 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2266 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2267 && mWaitForDisco.compareAndSet(true, false)) {
2268 finalizeBind();
2269 }
2270 }
2271 });
2272 }
2273
2274 private void sendEnableCarbons() {
2275 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
2276 iq.addChild("enable", Namespace.CARBONS);
2277 this.sendIqPacket(
2278 iq,
2279 (account, packet) -> {
2280 if (packet.getType() == IqPacket.TYPE.RESULT) {
2281 Log.d(
2282 Config.LOGTAG,
2283 account.getJid().asBareJid() + ": successfully enabled carbons");
2284 features.carbonsEnabled = true;
2285 } else {
2286 Log.d(
2287 Config.LOGTAG,
2288 account.getJid().asBareJid()
2289 + ": could not enable carbons "
2290 + packet);
2291 }
2292 });
2293 }
2294
2295 private void processStreamError(final Tag currentTag) throws IOException {
2296 final Element streamError = tagReader.readElement(currentTag);
2297 if (streamError == null) {
2298 return;
2299 }
2300 if (streamError.hasChild("conflict")) {
2301 account.setResource(createNewResource());
2302 Log.d(
2303 Config.LOGTAG,
2304 account.getJid().asBareJid()
2305 + ": switching resource due to conflict ("
2306 + account.getResource()
2307 + ")");
2308 throw new IOException();
2309 } else if (streamError.hasChild("host-unknown")) {
2310 throw new StateChangingException(Account.State.HOST_UNKNOWN);
2311 } else if (streamError.hasChild("policy-violation")) {
2312 this.lastConnect = SystemClock.elapsedRealtime();
2313 final String text = streamError.findChildContent("text");
2314 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
2315 failPendingMessages(text);
2316 throw new StateChangingException(Account.State.POLICY_VIOLATION);
2317 } else if (streamError.hasChild("see-other-host")) {
2318 final String seeOtherHost = streamError.findChildContent("see-other-host");
2319 final Resolver.Result currentResolverResult = this.currentResolverResult;
2320 if (Strings.isNullOrEmpty(seeOtherHost) || currentResolverResult == null) {
2321 Log.d(
2322 Config.LOGTAG,
2323 account.getJid().asBareJid() + ": stream error " + streamError);
2324 throw new StateChangingException(Account.State.STREAM_ERROR);
2325 }
2326 Log.d(
2327 Config.LOGTAG,
2328 account.getJid().asBareJid()
2329 + ": see other host: "
2330 + seeOtherHost
2331 + " "
2332 + currentResolverResult);
2333 final Resolver.Result seeOtherResult = currentResolverResult.seeOtherHost(seeOtherHost);
2334 if (seeOtherResult != null) {
2335 this.seeOtherHostResolverResult = seeOtherResult;
2336 throw new StateChangingException(Account.State.SEE_OTHER_HOST);
2337 } else {
2338 throw new StateChangingException(Account.State.STREAM_ERROR);
2339 }
2340 } else {
2341 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
2342 throw new StateChangingException(Account.State.STREAM_ERROR);
2343 }
2344 }
2345
2346 private void failPendingMessages(final String error) {
2347 synchronized (this.mStanzaQueue) {
2348 for (int i = 0; i < mStanzaQueue.size(); ++i) {
2349 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
2350 if (stanza instanceof MessagePacket packet) {
2351 final String id = packet.getId();
2352 final Jid to = packet.getTo();
2353 mXmppConnectionService.markMessage(
2354 account, to.asBareJid(), id, Message.STATUS_SEND_FAILED, error);
2355 }
2356 }
2357 }
2358 }
2359
2360 private boolean establishStream(final SSLSockets.Version sslVersion)
2361 throws IOException, InterruptedException {
2362 final boolean secureConnection = sslVersion != SSLSockets.Version.NONE;
2363 final SaslMechanism quickStartMechanism;
2364 if (secureConnection) {
2365 quickStartMechanism =
2366 SaslMechanism.ensureAvailable(account.getQuickStartMechanism(), sslVersion);
2367 } else {
2368 quickStartMechanism = null;
2369 }
2370 if (secureConnection
2371 && Config.QUICKSTART_ENABLED
2372 && quickStartMechanism != null
2373 && account.isOptionSet(Account.OPTION_QUICKSTART_AVAILABLE)) {
2374 mXmppConnectionService.restoredFromDatabaseLatch.await();
2375 this.loginInfo =
2376 new LoginInfo(
2377 quickStartMechanism,
2378 SaslMechanism.Version.SASL_2,
2379 Bind2.QUICKSTART_FEATURES);
2380 final boolean usingFast = quickStartMechanism instanceof HashedToken;
2381 final Element authenticate =
2382 generateAuthenticationRequest(
2383 quickStartMechanism.getClientFirstMessage(sslSocketOrNull(this.socket)),
2384 usingFast);
2385 authenticate.setAttribute("mechanism", quickStartMechanism.getMechanism());
2386 sendStartStream(true, false);
2387 synchronized (this.mStanzaQueue) {
2388 this.stanzasSentBeforeAuthentication = this.stanzasSent;
2389 tagWriter.writeElement(authenticate);
2390 }
2391 Log.d(
2392 Config.LOGTAG,
2393 account.getJid().toString()
2394 + ": quick start with "
2395 + quickStartMechanism.getMechanism());
2396 return true;
2397 } else {
2398 sendStartStream(secureConnection, true);
2399 return false;
2400 }
2401 }
2402
2403 private void sendStartStream(final boolean from, final boolean flush) throws IOException {
2404 final Tag stream = Tag.start("stream:stream");
2405 stream.setAttribute("to", account.getServer());
2406 if (from) {
2407 stream.setAttribute("from", account.getJid().asBareJid().toEscapedString());
2408 }
2409 stream.setAttribute("version", "1.0");
2410 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
2411 stream.setAttribute("xmlns", Namespace.JABBER_CLIENT);
2412 stream.setAttribute("xmlns:stream", Namespace.STREAMS);
2413 tagWriter.writeTag(stream, flush);
2414 }
2415
2416 private String createNewResource() {
2417 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
2418 }
2419
2420 private String nextRandomId() {
2421 return nextRandomId(false);
2422 }
2423
2424 private String nextRandomId(final boolean s) {
2425 return CryptoHelper.random(s ? 3 : 9);
2426 }
2427
2428 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
2429 packet.setFrom(account.getJid());
2430 return this.sendUnmodifiedIqPacket(packet, callback, false);
2431 }
2432
2433 public synchronized String sendUnmodifiedIqPacket(
2434 final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
2435 if (packet.getId() == null) {
2436 packet.setAttribute("id", nextRandomId());
2437 }
2438 if (callback != null) {
2439 synchronized (this.packetCallbacks) {
2440 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
2441 }
2442 }
2443 this.sendPacket(packet, force);
2444 return packet.getId();
2445 }
2446
2447 public void sendMessagePacket(final MessagePacket packet) {
2448 this.sendPacket(packet);
2449 }
2450
2451 public void sendPresencePacket(final PresencePacket packet) {
2452 this.sendPacket(packet);
2453 }
2454
2455 private synchronized void sendPacket(final AbstractStanza packet) {
2456 sendPacket(packet, false);
2457 }
2458
2459 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
2460 if (stanzasSent == Integer.MAX_VALUE) {
2461 resetStreamId();
2462 disconnect(true);
2463 return;
2464 }
2465 synchronized (this.mStanzaQueue) {
2466 if (force || isBound) {
2467 tagWriter.writeStanzaAsync(packet);
2468 } else {
2469 Log.d(
2470 Config.LOGTAG,
2471 account.getJid().asBareJid()
2472 + " do not write stanza to unbound stream "
2473 + packet.toString());
2474 }
2475 if (packet instanceof AbstractAcknowledgeableStanza stanza) {
2476 if (this.mStanzaQueue.size() != 0) {
2477 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
2478 if (currentHighestKey != stanzasSent) {
2479 throw new AssertionError("Stanza count messed up");
2480 }
2481 }
2482
2483 ++stanzasSent;
2484 if (Config.EXTENDED_SM_LOGGING) {
2485 Log.d(
2486 Config.LOGTAG,
2487 account.getJid().asBareJid()
2488 + ": counting outbound "
2489 + packet.getName()
2490 + " as #"
2491 + stanzasSent);
2492 }
2493 this.mStanzaQueue.append(stanzasSent, stanza);
2494 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
2495 if (Config.EXTENDED_SM_LOGGING) {
2496 Log.d(
2497 Config.LOGTAG,
2498 account.getJid().asBareJid()
2499 + ": requesting ack for message stanza #"
2500 + stanzasSent);
2501 }
2502 tagWriter.writeStanzaAsync(new RequestPacket());
2503 }
2504 }
2505 }
2506 }
2507
2508 public void sendPing() {
2509 if (!r()) {
2510 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2511 iq.setFrom(account.getJid());
2512 iq.addChild("ping", Namespace.PING);
2513 this.sendIqPacket(iq, null);
2514 }
2515 this.lastPingSent = SystemClock.elapsedRealtime();
2516 }
2517
2518 public void setOnMessagePacketReceivedListener(final OnMessagePacketReceived listener) {
2519 this.messageListener = listener;
2520 }
2521
2522 public void setOnUnregisteredIqPacketReceivedListener(final OnIqPacketReceived listener) {
2523 this.unregisteredIqListener = listener;
2524 }
2525
2526 public void setOnPresencePacketReceivedListener(final OnPresencePacketReceived listener) {
2527 this.presenceListener = listener;
2528 }
2529
2530 public void setOnJinglePacketReceivedListener(final OnJinglePacketReceived listener) {
2531 this.jingleListener = listener;
2532 }
2533
2534 public void setOnStatusChangedListener(final OnStatusChanged listener) {
2535 this.statusListener = listener;
2536 }
2537
2538 public void setOnBindListener(final OnBindListener listener) {
2539 this.bindListener = listener;
2540 }
2541
2542 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
2543 this.acknowledgedListener = listener;
2544 }
2545
2546 public void addOnAdvancedStreamFeaturesAvailableListener(
2547 final OnAdvancedStreamFeaturesLoaded listener) {
2548 this.advancedStreamFeaturesLoadedListeners.add(listener);
2549 }
2550
2551 private void forceCloseSocket() {
2552 FileBackend.close(this.socket);
2553 FileBackend.close(this.tagReader);
2554 }
2555
2556 public void interrupt() {
2557 if (this.mThread != null) {
2558 this.mThread.interrupt();
2559 }
2560 }
2561
2562 public void disconnect(final boolean force) {
2563 interrupt();
2564 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
2565 if (force) {
2566 forceCloseSocket();
2567 } else {
2568 final TagWriter currentTagWriter = this.tagWriter;
2569 if (currentTagWriter.isActive()) {
2570 currentTagWriter.finish();
2571 final Socket currentSocket = this.socket;
2572 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
2573 try {
2574 currentTagWriter.await(1, TimeUnit.SECONDS);
2575 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
2576 currentTagWriter.writeTag(Tag.end("stream:stream"));
2577 if (streamCountDownLatch != null) {
2578 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
2579 Log.d(
2580 Config.LOGTAG,
2581 account.getJid().asBareJid() + ": remote ended stream");
2582 } else {
2583 Log.d(
2584 Config.LOGTAG,
2585 account.getJid().asBareJid()
2586 + ": remote has not closed socket. force closing");
2587 }
2588 }
2589 } catch (InterruptedException e) {
2590 Log.d(
2591 Config.LOGTAG,
2592 account.getJid().asBareJid()
2593 + ": interrupted while gracefully closing stream");
2594 } catch (final IOException e) {
2595 Log.d(
2596 Config.LOGTAG,
2597 account.getJid().asBareJid()
2598 + ": io exception during disconnect ("
2599 + e.getMessage()
2600 + ")");
2601 } finally {
2602 FileBackend.close(currentSocket);
2603 }
2604 } else {
2605 forceCloseSocket();
2606 }
2607 }
2608 }
2609
2610 private void resetStreamId() {
2611 this.streamId = null;
2612 this.boundStreamFeatures = null;
2613 }
2614
2615 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
2616 synchronized (this.disco) {
2617 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
2618 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
2619 if (cursor.getValue().getFeatures().contains(feature)) {
2620 items.add(cursor);
2621 }
2622 }
2623 return items;
2624 }
2625 }
2626
2627 public Jid findDiscoItemByFeature(final String feature) {
2628 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
2629 if (items.size() >= 1) {
2630 return items.get(0).getKey();
2631 }
2632 return null;
2633 }
2634
2635 public boolean r() {
2636 if (getFeatures().sm()) {
2637 this.tagWriter.writeStanzaAsync(new RequestPacket());
2638 return true;
2639 } else {
2640 return false;
2641 }
2642 }
2643
2644 public List<String> getMucServersWithholdAccount() {
2645 final List<String> servers = getMucServers();
2646 servers.remove(account.getDomain().toEscapedString());
2647 return servers;
2648 }
2649
2650 public List<String> getMucServers() {
2651 List<String> servers = new ArrayList<>();
2652 synchronized (this.disco) {
2653 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
2654 final ServiceDiscoveryResult value = cursor.getValue();
2655 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
2656 && value.hasIdentity("conference", "text")
2657 && !value.getFeatures().contains("jabber:iq:gateway")
2658 && !value.hasIdentity("conference", "irc")) {
2659 servers.add(cursor.getKey().toString());
2660 }
2661 }
2662 }
2663 return servers;
2664 }
2665
2666 public String getMucServer() {
2667 List<String> servers = getMucServers();
2668 return servers.size() > 0 ? servers.get(0) : null;
2669 }
2670
2671 public int getTimeToNextAttempt(final boolean aggressive) {
2672 final int interval;
2673 if (aggressive) {
2674 interval = Math.min((int) (3 * Math.pow(1.3, attempt)), 60);
2675 } else {
2676 final int additionalTime =
2677 account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
2678 interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
2679 }
2680 final int secondsSinceLast =
2681 (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
2682 return interval - secondsSinceLast;
2683 }
2684
2685 public int getAttempt() {
2686 return this.attempt;
2687 }
2688
2689 public Features getFeatures() {
2690 return this.features;
2691 }
2692
2693 public long getLastSessionEstablished() {
2694 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
2695 return System.currentTimeMillis() - diff;
2696 }
2697
2698 public long getLastConnect() {
2699 return this.lastConnect;
2700 }
2701
2702 public long getLastPingSent() {
2703 return this.lastPingSent;
2704 }
2705
2706 public long getLastDiscoStarted() {
2707 return this.lastDiscoStarted;
2708 }
2709
2710 public long getLastPacketReceived() {
2711 return this.lastPacketReceived;
2712 }
2713
2714 public void sendActive() {
2715 this.sendPacket(new ActivePacket());
2716 }
2717
2718 public void sendInactive() {
2719 this.sendPacket(new InactivePacket());
2720 }
2721
2722 public void resetAttemptCount(boolean resetConnectTime) {
2723 this.attempt = 0;
2724 if (resetConnectTime) {
2725 this.lastConnect = 0;
2726 }
2727 }
2728
2729 public void setInteractive(boolean interactive) {
2730 this.mInteractive = interactive;
2731 }
2732
2733 private IqGenerator getIqGenerator() {
2734 return mXmppConnectionService.getIqGenerator();
2735 }
2736
2737 public void trackOfflineMessageRetrieval(boolean trackOfflineMessageRetrieval) {
2738 if (trackOfflineMessageRetrieval) {
2739 final IqPacket iqPing = new IqPacket(IqPacket.TYPE.GET);
2740 iqPing.addChild("ping", Namespace.PING);
2741 this.sendIqPacket(
2742 iqPing,
2743 (a, response) -> {
2744 Log.d(
2745 Config.LOGTAG,
2746 account.getJid().asBareJid()
2747 + ": got ping response after sending initial presence");
2748 XmppConnection.this.offlineMessagesRetrieved = true;
2749 });
2750 } else {
2751 this.offlineMessagesRetrieved = true;
2752 }
2753 }
2754
2755 public boolean isOfflineMessagesRetrieved() {
2756 return this.offlineMessagesRetrieved;
2757 }
2758
2759 private class MyKeyManager implements X509KeyManager {
2760 @Override
2761 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
2762 return account.getPrivateKeyAlias();
2763 }
2764
2765 @Override
2766 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
2767 return null;
2768 }
2769
2770 @Override
2771 public X509Certificate[] getCertificateChain(String alias) {
2772 Log.d(Config.LOGTAG, "getting certificate chain");
2773 try {
2774 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
2775 } catch (final Exception e) {
2776 Log.d(Config.LOGTAG, "could not get certificate chain", e);
2777 return new X509Certificate[0];
2778 }
2779 }
2780
2781 @Override
2782 public String[] getClientAliases(String s, Principal[] principals) {
2783 final String alias = account.getPrivateKeyAlias();
2784 return alias != null ? new String[] {alias} : new String[0];
2785 }
2786
2787 @Override
2788 public String[] getServerAliases(String s, Principal[] principals) {
2789 return new String[0];
2790 }
2791
2792 @Override
2793 public PrivateKey getPrivateKey(String alias) {
2794 try {
2795 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
2796 } catch (Exception e) {
2797 return null;
2798 }
2799 }
2800 }
2801
2802 private static class LoginInfo {
2803 public final SaslMechanism saslMechanism;
2804 public final SaslMechanism.Version saslVersion;
2805 public final List<String> inlineBindFeatures;
2806 public final AtomicBoolean success = new AtomicBoolean(false);
2807
2808 private LoginInfo(
2809 final SaslMechanism saslMechanism,
2810 final SaslMechanism.Version saslVersion,
2811 final Collection<String> inlineBindFeatures) {
2812 Preconditions.checkNotNull(saslMechanism, "SASL Mechanism must not be null");
2813 Preconditions.checkNotNull(saslVersion, "SASL version must not be null");
2814 this.saslMechanism = saslMechanism;
2815 this.saslVersion = saslVersion;
2816 this.inlineBindFeatures =
2817 inlineBindFeatures == null
2818 ? Collections.emptyList()
2819 : ImmutableList.copyOf(inlineBindFeatures);
2820 }
2821
2822 public static SaslMechanism mechanism(final LoginInfo loginInfo) {
2823 return loginInfo == null ? null : loginInfo.saslMechanism;
2824 }
2825
2826 public void success(final String challenge, final SSLSocket sslSocket)
2827 throws SaslMechanism.AuthenticationException {
2828 final var response = this.saslMechanism.getResponse(challenge, sslSocket);
2829 if (!Strings.isNullOrEmpty(response)) {
2830 throw new SaslMechanism.AuthenticationException(
2831 "processing success yielded another response");
2832 }
2833 if (this.success.compareAndSet(false, true)) {
2834 return;
2835 }
2836 throw new SaslMechanism.AuthenticationException("Process 'success' twice");
2837 }
2838
2839 public static boolean isSuccess(final LoginInfo loginInfo) {
2840 return loginInfo != null && loginInfo.success.get();
2841 }
2842 }
2843
2844 private static class StreamId {
2845 public final String id;
2846 public final Resolver.Result location;
2847
2848 private StreamId(String id, Resolver.Result location) {
2849 this.id = id;
2850 this.location = location;
2851 }
2852
2853 @NonNull
2854 @Override
2855 public String toString() {
2856 return MoreObjects.toStringHelper(this)
2857 .add("id", id)
2858 .add("location", location)
2859 .toString();
2860 }
2861 }
2862
2863 private static class StateChangingError extends Error {
2864 private final Account.State state;
2865
2866 public StateChangingError(Account.State state) {
2867 this.state = state;
2868 }
2869 }
2870
2871 private static class StateChangingException extends IOException {
2872 private final Account.State state;
2873
2874 public StateChangingException(Account.State state) {
2875 this.state = state;
2876 }
2877 }
2878
2879 public class Features {
2880 XmppConnection connection;
2881 private boolean carbonsEnabled = false;
2882 private boolean encryptionEnabled = false;
2883 private boolean blockListRequested = false;
2884
2885 public Features(final XmppConnection connection) {
2886 this.connection = connection;
2887 }
2888
2889 private boolean hasDiscoFeature(final Jid server, final String feature) {
2890 synchronized (XmppConnection.this.disco) {
2891 final ServiceDiscoveryResult sdr = connection.disco.get(server);
2892 return sdr != null && sdr.getFeatures().contains(feature);
2893 }
2894 }
2895
2896 public boolean carbons() {
2897 return hasDiscoFeature(account.getDomain(), Namespace.CARBONS);
2898 }
2899
2900 public boolean commands() {
2901 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2902 }
2903
2904 public boolean easyOnboardingInvites() {
2905 synchronized (commands) {
2906 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2907 }
2908 }
2909
2910 public boolean bookmarksConversion() {
2911 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION)
2912 && pepPublishOptions();
2913 }
2914
2915 public boolean blocking() {
2916 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2917 }
2918
2919 public boolean spamReporting() {
2920 return hasDiscoFeature(account.getDomain(), Namespace.REPORTING);
2921 }
2922
2923 public boolean flexibleOfflineMessageRetrieval() {
2924 return hasDiscoFeature(
2925 account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2926 }
2927
2928 public boolean register() {
2929 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2930 }
2931
2932 public boolean invite() {
2933 return connection.streamFeatures != null
2934 && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2935 }
2936
2937 public boolean sm() {
2938 return streamId != null
2939 || (connection.streamFeatures != null
2940 && connection.streamFeatures.hasChild(
2941 "sm", Namespace.STREAM_MANAGEMENT));
2942 }
2943
2944 public boolean csi() {
2945 return connection.streamFeatures != null
2946 && connection.streamFeatures.hasChild("csi", Namespace.CSI);
2947 }
2948
2949 public boolean pep() {
2950 synchronized (XmppConnection.this.disco) {
2951 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2952 return info != null && info.hasIdentity("pubsub", "pep");
2953 }
2954 }
2955
2956 public boolean pepPersistent() {
2957 synchronized (XmppConnection.this.disco) {
2958 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2959 return info != null
2960 && info.getFeatures()
2961 .contains("http://jabber.org/protocol/pubsub#persistent-items");
2962 }
2963 }
2964
2965 public boolean pepPublishOptions() {
2966 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2967 }
2968
2969 public boolean pepOmemoWhitelisted() {
2970 return hasDiscoFeature(
2971 account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2972 }
2973
2974 public boolean mam() {
2975 return MessageArchiveService.Version.has(getAccountFeatures());
2976 }
2977
2978 public List<String> getAccountFeatures() {
2979 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2980 return result == null ? Collections.emptyList() : result.getFeatures();
2981 }
2982
2983 public boolean push() {
2984 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2985 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2986 }
2987
2988 public boolean rosterVersioning() {
2989 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2990 }
2991
2992 public void setBlockListRequested(boolean value) {
2993 this.blockListRequested = value;
2994 }
2995
2996 public boolean httpUpload(long filesize) {
2997 if (Config.DISABLE_HTTP_UPLOAD) {
2998 return false;
2999 } else {
3000 for (String namespace :
3001 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
3002 List<Entry<Jid, ServiceDiscoveryResult>> items =
3003 findDiscoItemsByFeature(namespace);
3004 if (items.size() > 0) {
3005 try {
3006 long maxsize =
3007 Long.parseLong(
3008 items.get(0)
3009 .getValue()
3010 .getExtendedDiscoInformation(
3011 namespace, "max-file-size"));
3012 if (filesize <= maxsize) {
3013 return true;
3014 } else {
3015 Log.d(
3016 Config.LOGTAG,
3017 account.getJid().asBareJid()
3018 + ": http upload is not available for files with size "
3019 + filesize
3020 + " (max is "
3021 + maxsize
3022 + ")");
3023 return false;
3024 }
3025 } catch (Exception e) {
3026 return true;
3027 }
3028 }
3029 }
3030 return false;
3031 }
3032 }
3033
3034 public boolean useLegacyHttpUpload() {
3035 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null
3036 && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
3037 }
3038
3039 public long getMaxHttpUploadSize() {
3040 for (String namespace :
3041 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
3042 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
3043 if (items.size() > 0) {
3044 try {
3045 return Long.parseLong(
3046 items.get(0)
3047 .getValue()
3048 .getExtendedDiscoInformation(namespace, "max-file-size"));
3049 } catch (Exception e) {
3050 // ignored
3051 }
3052 }
3053 }
3054 return -1;
3055 }
3056
3057 public boolean stanzaIds() {
3058 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
3059 }
3060
3061 public boolean bookmarks2() {
3062 return pepPublishOptions()
3063 && hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT);
3064 }
3065
3066 public boolean externalServiceDiscovery() {
3067 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
3068 }
3069 }
3070}