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(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
1146 }
1147 resetStreamId();
1148 if (sendBindRequest) {
1149 sendBindRequest();
1150 }
1151 }
1152
1153 private boolean acknowledgeStanzaUpTo(final int serverCount) {
1154 if (serverCount > stanzasSent) {
1155 Log.e(
1156 Config.LOGTAG,
1157 "server acknowledged more stanzas than we sent. serverCount="
1158 + serverCount
1159 + ", ourCount="
1160 + stanzasSent);
1161 }
1162 boolean acknowledgedMessages = false;
1163 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1164 if (serverCount >= mStanzaQueue.keyAt(i)) {
1165 if (Config.EXTENDED_SM_LOGGING) {
1166 Log.d(
1167 Config.LOGTAG,
1168 account.getJid().asBareJid()
1169 + ": server acknowledged stanza #"
1170 + mStanzaQueue.keyAt(i));
1171 }
1172 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1173 if (stanza instanceof MessagePacket packet && acknowledgedListener != null) {
1174 final String id = packet.getId();
1175 final Jid to = packet.getTo();
1176 if (id != null && to != null) {
1177 acknowledgedMessages |=
1178 acknowledgedListener.onMessageAcknowledged(account, to, id);
1179 }
1180 }
1181 mStanzaQueue.removeAt(i);
1182 i--;
1183 }
1184 }
1185 return acknowledgedMessages;
1186 }
1187
1188 private @NonNull Element processPacket(final Tag currentTag, final int packetType)
1189 throws IOException {
1190 final Element element =
1191 switch (packetType) {
1192 case PACKET_IQ -> new IqPacket();
1193 case PACKET_MESSAGE -> new MessagePacket();
1194 case PACKET_PRESENCE -> new PresencePacket();
1195 default -> throw new AssertionError("Should never encounter invalid type");
1196 };
1197 element.setAttributes(currentTag.getAttributes());
1198 Tag nextTag = tagReader.readTag();
1199 if (nextTag == null) {
1200 throw new IOException("interrupted mid tag");
1201 }
1202 while (!nextTag.isEnd(element.getName())) {
1203 if (!nextTag.isNo()) {
1204 element.addChild(tagReader.readElement(nextTag));
1205 }
1206 nextTag = tagReader.readTag();
1207 if (nextTag == null) {
1208 throw new IOException("interrupted mid tag");
1209 }
1210 }
1211 if (stanzasReceived == Integer.MAX_VALUE) {
1212 resetStreamId();
1213 throw new IOException("time to restart the session. cant handle >2 billion pcks");
1214 }
1215 if (inSmacksSession) {
1216 ++stanzasReceived;
1217 } else if (features.sm()) {
1218 Log.d(
1219 Config.LOGTAG,
1220 account.getJid().asBareJid()
1221 + ": not counting stanza("
1222 + element.getClass().getSimpleName()
1223 + "). Not in smacks session.");
1224 }
1225 lastPacketReceived = SystemClock.elapsedRealtime();
1226 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
1227 Log.d(Config.LOGTAG, "[background stanza] " + element);
1228 }
1229 if (element instanceof IqPacket
1230 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
1231 && element.hasChild("jingle", Namespace.JINGLE)) {
1232 return JinglePacket.upgrade((IqPacket) element);
1233 } else {
1234 return element;
1235 }
1236 }
1237
1238 private void processIq(final Tag currentTag) throws IOException {
1239 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
1240 if (!packet.valid()) {
1241 Log.e(
1242 Config.LOGTAG,
1243 "encountered invalid iq from='"
1244 + packet.getFrom()
1245 + "' to='"
1246 + packet.getTo()
1247 + "'");
1248 return;
1249 }
1250 if (Thread.currentThread().isInterrupted()) {
1251 Log.d(
1252 Config.LOGTAG,
1253 account.getJid().asBareJid() + "Not processing iq. Thread was interrupted");
1254 return;
1255 }
1256 if (packet instanceof JinglePacket jinglePacket && isBound) {
1257 if (this.jingleListener != null) {
1258 this.jingleListener.onJinglePacketReceived(account, jinglePacket);
1259 }
1260 } else {
1261 final OnIqPacketReceived callback = getIqPacketReceivedCallback(packet);
1262 if (callback == null) {
1263 Log.d(
1264 Config.LOGTAG,
1265 account.getJid().asBareJid().toString()
1266 + ": no callback registered for IQ from "
1267 + packet.getFrom());
1268 return;
1269 }
1270 try {
1271 callback.onIqPacketReceived(account, packet);
1272 } catch (final StateChangingError error) {
1273 throw new StateChangingException(error.state);
1274 }
1275 }
1276 }
1277
1278 private OnIqPacketReceived getIqPacketReceivedCallback(final IqPacket stanza)
1279 throws StateChangingException {
1280 final boolean isRequest =
1281 stanza.getType() == IqPacket.TYPE.GET || stanza.getType() == IqPacket.TYPE.SET;
1282 if (isRequest) {
1283 if (isBound) {
1284 return this.unregisteredIqListener;
1285 } else {
1286 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1287 }
1288 } else {
1289 synchronized (this.packetCallbacks) {
1290 final var pair = packetCallbacks.get(stanza.getId());
1291 if (pair == null) {
1292 return null;
1293 }
1294 if (pair.first.toServer(account)) {
1295 if (stanza.fromServer(account)) {
1296 packetCallbacks.remove(stanza.getId());
1297 return pair.second;
1298 } else {
1299 Log.e(
1300 Config.LOGTAG,
1301 account.getJid().asBareJid().toString()
1302 + ": ignoring spoofed iq packet");
1303 }
1304 } else {
1305 if (stanza.getFrom() != null && stanza.getFrom().equals(pair.first.getTo())) {
1306 packetCallbacks.remove(stanza.getId());
1307 return pair.second;
1308 } else {
1309 Log.e(
1310 Config.LOGTAG,
1311 account.getJid().asBareJid().toString()
1312 + ": ignoring spoofed iq packet");
1313 }
1314 }
1315 }
1316 }
1317 return null;
1318 }
1319
1320 private void processMessage(final Tag currentTag) throws IOException {
1321 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
1322 if (!packet.valid()) {
1323 Log.e(
1324 Config.LOGTAG,
1325 "encountered invalid message from='"
1326 + packet.getFrom()
1327 + "' to='"
1328 + packet.getTo()
1329 + "'");
1330 return;
1331 }
1332 if (Thread.currentThread().isInterrupted()) {
1333 Log.d(
1334 Config.LOGTAG,
1335 account.getJid().asBareJid()
1336 + "Not processing message. Thread was interrupted");
1337 return;
1338 }
1339 this.messageListener.onMessagePacketReceived(account, packet);
1340 }
1341
1342 private void processPresence(final Tag currentTag) throws IOException {
1343 final PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
1344 if (!packet.valid()) {
1345 Log.e(
1346 Config.LOGTAG,
1347 "encountered invalid presence from='"
1348 + packet.getFrom()
1349 + "' to='"
1350 + packet.getTo()
1351 + "'");
1352 return;
1353 }
1354 if (Thread.currentThread().isInterrupted()) {
1355 Log.d(
1356 Config.LOGTAG,
1357 account.getJid().asBareJid()
1358 + "Not processing presence. Thread was interrupted");
1359 return;
1360 }
1361 this.presenceListener.onPresencePacketReceived(account, packet);
1362 }
1363
1364 private void sendStartTLS() throws IOException {
1365 final Tag startTLS = Tag.empty("starttls");
1366 startTLS.setAttribute("xmlns", Namespace.TLS);
1367 tagWriter.writeTag(startTLS);
1368 }
1369
1370 private void switchOverToTls() throws XmlPullParserException, IOException {
1371 tagReader.readTag();
1372 final Socket socket = this.socket;
1373 final SSLSocket sslSocket = upgradeSocketToTls(socket);
1374 this.socket = sslSocket;
1375 this.tagReader.setInputStream(sslSocket.getInputStream());
1376 this.tagWriter.setOutputStream(sslSocket.getOutputStream());
1377 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
1378 final boolean quickStart;
1379 try {
1380 quickStart = establishStream(SSLSockets.version(sslSocket));
1381 } catch (final InterruptedException e) {
1382 return;
1383 }
1384 if (quickStart) {
1385 this.quickStartInProgress = true;
1386 }
1387 features.encryptionEnabled = true;
1388 final Tag tag = tagReader.readTag();
1389 if (tag != null && tag.isStart("stream", Namespace.STREAMS)) {
1390 SSLSockets.log(account, sslSocket);
1391 processStream();
1392 } else {
1393 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
1394 }
1395 sslSocket.close();
1396 }
1397
1398 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
1399 final SSLSocketFactory sslSocketFactory;
1400 try {
1401 sslSocketFactory = getSSLSocketFactory();
1402 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
1403 throw new StateChangingException(Account.State.TLS_ERROR);
1404 }
1405 final InetAddress address = socket.getInetAddress();
1406 final SSLSocket sslSocket =
1407 (SSLSocket)
1408 sslSocketFactory.createSocket(
1409 socket, address.getHostAddress(), socket.getPort(), true);
1410 SSLSockets.setSecurity(sslSocket);
1411 SSLSockets.setHostname(sslSocket, IDN.toASCII(account.getServer()));
1412 SSLSockets.setApplicationProtocol(sslSocket, "xmpp-client");
1413 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
1414 try {
1415 if (!xmppDomainVerifier.verify(
1416 account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
1417 Log.d(
1418 Config.LOGTAG,
1419 account.getJid().asBareJid()
1420 + ": TLS certificate domain verification failed");
1421 FileBackend.close(sslSocket);
1422 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
1423 }
1424 } catch (final SSLPeerUnverifiedException e) {
1425 FileBackend.close(sslSocket);
1426 throw new StateChangingException(Account.State.TLS_ERROR);
1427 }
1428 return sslSocket;
1429 }
1430
1431 private void processStreamFeatures(final Tag currentTag) throws IOException {
1432 this.streamFeatures = tagReader.readElement(currentTag);
1433 final boolean isSecure = isSecure();
1434 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
1435 if (this.quickStartInProgress) {
1436 if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1437 Log.d(
1438 Config.LOGTAG,
1439 account.getJid().asBareJid()
1440 + ": quick start in progress. ignoring features: "
1441 + XmlHelper.printElementNames(this.streamFeatures));
1442 if (SaslMechanism.hashedToken(LoginInfo.mechanism(this.loginInfo))) {
1443 return;
1444 }
1445 if (isFastTokenAvailable(
1446 this.streamFeatures.findChild("authentication", Namespace.SASL_2))) {
1447 Log.d(
1448 Config.LOGTAG,
1449 account.getJid().asBareJid()
1450 + ": fast token available; resetting quick start");
1451 account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, false);
1452 mXmppConnectionService.databaseBackend.updateAccount(account);
1453 }
1454 return;
1455 }
1456 Log.d(
1457 Config.LOGTAG,
1458 account.getJid().asBareJid()
1459 + ": server lost support for SASL 2. quick start not possible");
1460 this.account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, false);
1461 mXmppConnectionService.databaseBackend.updateAccount(account);
1462 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1463 }
1464 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
1465 && !features.encryptionEnabled) {
1466 sendStartTLS();
1467 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1468 && account.isOptionSet(Account.OPTION_REGISTER)) {
1469 if (isSecure) {
1470 register();
1471 } else {
1472 Log.d(
1473 Config.LOGTAG,
1474 account.getJid().asBareJid()
1475 + ": unable to find STARTTLS for registration process "
1476 + XmlHelper.printElementNames(this.streamFeatures));
1477 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1478 }
1479 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1480 && account.isOptionSet(Account.OPTION_REGISTER)) {
1481 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
1482 } else if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)
1483 && shouldAuthenticate
1484 && isSecure) {
1485 authenticate(SaslMechanism.Version.SASL_2);
1486 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
1487 && shouldAuthenticate
1488 && isSecure) {
1489 authenticate(SaslMechanism.Version.SASL);
1490 } else if (this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT)
1491 && isSecure
1492 && LoginInfo.isSuccess(loginInfo)
1493 && streamId != null
1494 && !inSmacksSession) {
1495 if (Config.EXTENDED_SM_LOGGING) {
1496 Log.d(
1497 Config.LOGTAG,
1498 account.getJid().asBareJid()
1499 + ": resuming after stanza #"
1500 + stanzasReceived);
1501 }
1502 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1503 this.mSmCatchupMessageCounter.set(0);
1504 this.mWaitingForSmCatchup.set(true);
1505 this.tagWriter.writeStanzaAsync(resume);
1506 } else if (needsBinding) {
1507 if (this.streamFeatures.hasChild("bind", Namespace.BIND)
1508 && isSecure
1509 && LoginInfo.isSuccess(loginInfo)) {
1510 sendBindRequest();
1511 } else {
1512 Log.d(
1513 Config.LOGTAG,
1514 account.getJid().asBareJid()
1515 + ": unable to find bind feature "
1516 + XmlHelper.printElementNames(this.streamFeatures));
1517 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1518 }
1519 } else {
1520 Log.d(
1521 Config.LOGTAG,
1522 account.getJid().asBareJid()
1523 + ": received NOP stream features: "
1524 + XmlHelper.printElementNames(this.streamFeatures));
1525 }
1526 }
1527
1528 private void authenticate() throws IOException {
1529 final boolean isSecure = isSecure();
1530 if (isSecure && this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1531 authenticate(SaslMechanism.Version.SASL_2);
1532 } else if (isSecure && this.streamFeatures.hasChild("mechanisms", Namespace.SASL)) {
1533 authenticate(SaslMechanism.Version.SASL);
1534 } else {
1535 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1536 }
1537 }
1538
1539 private boolean isSecure() {
1540 return features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
1541 }
1542
1543 private void authenticate(final SaslMechanism.Version version) throws IOException {
1544 final Element authElement;
1545 if (version == SaslMechanism.Version.SASL) {
1546 authElement = this.streamFeatures.findChild("mechanisms", Namespace.SASL);
1547 } else {
1548 authElement = this.streamFeatures.findChild("authentication", Namespace.SASL_2);
1549 }
1550 final Collection<String> mechanisms = SaslMechanism.mechanisms(authElement);
1551 final Element cbElement =
1552 this.streamFeatures.findChild("sasl-channel-binding", Namespace.CHANNEL_BINDING);
1553 final Collection<ChannelBinding> channelBindings = ChannelBinding.of(cbElement);
1554 final SaslMechanism.Factory factory = new SaslMechanism.Factory(account);
1555 final SaslMechanism saslMechanism =
1556 factory.of(mechanisms, channelBindings, version, SSLSockets.version(this.socket));
1557 this.validate(saslMechanism, mechanisms);
1558 final boolean quickStartAvailable;
1559 final String firstMessage =
1560 saslMechanism.getClientFirstMessage(sslSocketOrNull(this.socket));
1561 final boolean usingFast = SaslMechanism.hashedToken(saslMechanism);
1562 final Element authenticate;
1563 if (version == SaslMechanism.Version.SASL) {
1564 authenticate = new Element("auth", Namespace.SASL);
1565 if (!Strings.isNullOrEmpty(firstMessage)) {
1566 authenticate.setContent(firstMessage);
1567 }
1568 quickStartAvailable = false;
1569 this.loginInfo = new LoginInfo(saslMechanism, version, Collections.emptyList());
1570 } else if (version == SaslMechanism.Version.SASL_2) {
1571 final Element inline = authElement.findChild("inline", Namespace.SASL_2);
1572 final boolean sm = inline != null && inline.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1573 final HashedToken.Mechanism hashTokenRequest;
1574 if (usingFast) {
1575 hashTokenRequest = null;
1576 } else {
1577 final Element fast =
1578 inline == null ? null : inline.findChild("fast", Namespace.FAST);
1579 final Collection<String> fastMechanisms = SaslMechanism.mechanisms(fast);
1580 hashTokenRequest =
1581 HashedToken.Mechanism.best(fastMechanisms, SSLSockets.version(this.socket));
1582 }
1583 final Collection<String> bindFeatures = Bind2.features(inline);
1584 quickStartAvailable =
1585 sm
1586 && bindFeatures != null
1587 && bindFeatures.containsAll(Bind2.QUICKSTART_FEATURES);
1588 if (bindFeatures != null) {
1589 try {
1590 mXmppConnectionService.restoredFromDatabaseLatch.await();
1591 } catch (final InterruptedException e) {
1592 Log.d(
1593 Config.LOGTAG,
1594 account.getJid().asBareJid()
1595 + ": interrupted while waiting for DB restore during SASL2 bind");
1596 return;
1597 }
1598 }
1599 this.loginInfo = new LoginInfo(saslMechanism, version, bindFeatures);
1600 this.hashTokenRequest = hashTokenRequest;
1601 authenticate =
1602 generateAuthenticationRequest(
1603 firstMessage, usingFast, hashTokenRequest, bindFeatures, sm);
1604 } else {
1605 throw new AssertionError("Missing implementation for " + version);
1606 }
1607
1608 if (account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, quickStartAvailable)) {
1609 mXmppConnectionService.databaseBackend.updateAccount(account);
1610 }
1611
1612 Log.d(
1613 Config.LOGTAG,
1614 account.getJid().toString()
1615 + ": Authenticating with "
1616 + version
1617 + "/"
1618 + LoginInfo.mechanism(this.loginInfo).getMechanism());
1619 authenticate.setAttribute("mechanism", LoginInfo.mechanism(this.loginInfo).getMechanism());
1620 synchronized (this.mStanzaQueue) {
1621 this.stanzasSentBeforeAuthentication = this.stanzasSent;
1622 tagWriter.writeElement(authenticate);
1623 }
1624 }
1625
1626 private static boolean isFastTokenAvailable(final Element authentication) {
1627 final Element inline = authentication == null ? null : authentication.findChild("inline");
1628 return inline != null && inline.hasChild("fast", Namespace.FAST);
1629 }
1630
1631 private void validate(
1632 final @Nullable SaslMechanism saslMechanism, Collection<String> mechanisms)
1633 throws StateChangingException {
1634 if (saslMechanism == null) {
1635 Log.d(
1636 Config.LOGTAG,
1637 account.getJid().asBareJid()
1638 + ": unable to find supported SASL mechanism in "
1639 + mechanisms);
1640 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1641 }
1642 if (SaslMechanism.hashedToken(saslMechanism)) {
1643 return;
1644 }
1645 final int pinnedMechanism = account.getPinnedMechanismPriority();
1646 if (pinnedMechanism > saslMechanism.getPriority()) {
1647 Log.e(
1648 Config.LOGTAG,
1649 "Auth failed. Authentication mechanism "
1650 + saslMechanism.getMechanism()
1651 + " has lower priority ("
1652 + saslMechanism.getPriority()
1653 + ") than pinned priority ("
1654 + pinnedMechanism
1655 + "). Possible downgrade attack?");
1656 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1657 }
1658 }
1659
1660 private Element generateAuthenticationRequest(
1661 final String firstMessage, final boolean usingFast) {
1662 return generateAuthenticationRequest(
1663 firstMessage, usingFast, null, Bind2.QUICKSTART_FEATURES, true);
1664 }
1665
1666 private Element generateAuthenticationRequest(
1667 final String firstMessage,
1668 final boolean usingFast,
1669 final HashedToken.Mechanism hashedTokenRequest,
1670 final Collection<String> bind,
1671 final boolean inlineStreamManagement) {
1672 final Element authenticate = new Element("authenticate", Namespace.SASL_2);
1673 if (!Strings.isNullOrEmpty(firstMessage)) {
1674 authenticate.addChild("initial-response").setContent(firstMessage);
1675 }
1676 final Element userAgent = authenticate.addChild("user-agent");
1677 userAgent.setAttribute("id", AccountUtils.publicDeviceId(account));
1678 userAgent
1679 .addChild("software")
1680 .setContent(mXmppConnectionService.getString(R.string.app_name));
1681 if (!PhoneHelper.isEmulator()) {
1682 userAgent
1683 .addChild("device")
1684 .setContent(String.format("%s %s", Build.MANUFACTURER, Build.MODEL));
1685 }
1686 // do not include bind if 'inlineStreamManagement' is missing and we have a streamId
1687 // (because we would rather just do a normal SM/resume)
1688 final boolean mayAttemptBind = streamId == null || inlineStreamManagement;
1689 if (bind != null && mayAttemptBind) {
1690 authenticate.addChild(generateBindRequest(bind));
1691 }
1692 if (inlineStreamManagement && streamId != null) {
1693 final ResumePacket resume = new ResumePacket(this.streamId.id, stanzasReceived);
1694 this.mSmCatchupMessageCounter.set(0);
1695 this.mWaitingForSmCatchup.set(true);
1696 authenticate.addChild(resume);
1697 }
1698 if (hashedTokenRequest != null) {
1699 authenticate
1700 .addChild("request-token", Namespace.FAST)
1701 .setAttribute("mechanism", hashedTokenRequest.name());
1702 }
1703 if (usingFast) {
1704 authenticate.addChild("fast", Namespace.FAST);
1705 }
1706 return authenticate;
1707 }
1708
1709 private Element generateBindRequest(final Collection<String> bindFeatures) {
1710 Log.d(Config.LOGTAG, "inline bind features: " + bindFeatures);
1711 final Element bind = new Element("bind", Namespace.BIND2);
1712 bind.addChild("tag").setContent(mXmppConnectionService.getString(R.string.app_name));
1713 if (bindFeatures.contains(Namespace.CARBONS)) {
1714 bind.addChild("enable", Namespace.CARBONS);
1715 }
1716 if (bindFeatures.contains(Namespace.STREAM_MANAGEMENT)) {
1717 bind.addChild(new EnablePacket());
1718 }
1719 return bind;
1720 }
1721
1722 private void register() {
1723 final String preAuth = account.getKey(Account.KEY_PRE_AUTH_REGISTRATION_TOKEN);
1724 if (preAuth != null && features.invite()) {
1725 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1726 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1727 sendUnmodifiedIqPacket(
1728 preAuthRequest,
1729 (account, response) -> {
1730 if (response.getType() == IqPacket.TYPE.RESULT) {
1731 sendRegistryRequest();
1732 } else {
1733 final String error = response.getErrorCondition();
1734 Log.d(
1735 Config.LOGTAG,
1736 account.getJid().asBareJid()
1737 + ": failed to pre auth. "
1738 + error);
1739 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1740 }
1741 },
1742 true);
1743 } else {
1744 sendRegistryRequest();
1745 }
1746 }
1747
1748 private void sendRegistryRequest() {
1749 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1750 register.query(Namespace.REGISTER);
1751 register.setTo(account.getDomain());
1752 sendUnmodifiedIqPacket(
1753 register,
1754 (account, packet) -> {
1755 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1756 return;
1757 }
1758 if (packet.getType() == IqPacket.TYPE.ERROR) {
1759 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1760 }
1761 final Element query = packet.query(Namespace.REGISTER);
1762 if (query.hasChild("username") && (query.hasChild("password"))) {
1763 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1764 final Element username =
1765 new Element("username").setContent(account.getUsername());
1766 final Element password =
1767 new Element("password").setContent(account.getPassword());
1768 register1.query(Namespace.REGISTER).addChild(username);
1769 register1.query().addChild(password);
1770 register1.setFrom(account.getJid().asBareJid());
1771 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1772 } else if (query.hasChild("x", Namespace.DATA)) {
1773 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1774 final Element blob = query.findChild("data", "urn:xmpp:bob");
1775 final String id = packet.getId();
1776 InputStream is;
1777 if (blob != null) {
1778 try {
1779 final String base64Blob = blob.getContent();
1780 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1781 is = new ByteArrayInputStream(strBlob);
1782 } catch (Exception e) {
1783 is = null;
1784 }
1785 } else {
1786 final boolean useTor =
1787 mXmppConnectionService.useTorToConnect() || account.isOnion();
1788 try {
1789 final String url = data.getValue("url");
1790 final String fallbackUrl = data.getValue("captcha-fallback-url");
1791 if (url != null) {
1792 is = HttpConnectionManager.open(url, useTor);
1793 } else if (fallbackUrl != null) {
1794 is = HttpConnectionManager.open(fallbackUrl, useTor);
1795 } else {
1796 is = null;
1797 }
1798 } catch (final IOException e) {
1799 Log.d(
1800 Config.LOGTAG,
1801 account.getJid().asBareJid() + ": unable to fetch captcha",
1802 e);
1803 is = null;
1804 }
1805 }
1806
1807 if (is != null) {
1808 Bitmap captcha = BitmapFactory.decodeStream(is);
1809 try {
1810 if (mXmppConnectionService.displayCaptchaRequest(
1811 account, id, data, captcha)) {
1812 return;
1813 }
1814 } catch (Exception e) {
1815 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1816 }
1817 }
1818 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1819 } else if (query.hasChild("instructions")
1820 || query.hasChild("x", Namespace.OOB)) {
1821 final String instructions = query.findChildContent("instructions");
1822 final Element oob = query.findChild("x", Namespace.OOB);
1823 final String url = oob == null ? null : oob.findChildContent("url");
1824 if (url != null) {
1825 setAccountCreationFailed(url);
1826 } else if (instructions != null) {
1827 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1828 if (matcher.find()) {
1829 setAccountCreationFailed(
1830 instructions.substring(matcher.start(), matcher.end()));
1831 }
1832 }
1833 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1834 }
1835 },
1836 true);
1837 }
1838
1839 private void setAccountCreationFailed(final String url) {
1840 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1841 if (httpUrl != null && httpUrl.isHttps()) {
1842 this.redirectionUrl = httpUrl;
1843 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1844 }
1845 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1846 }
1847
1848 public HttpUrl getRedirectionUrl() {
1849 return this.redirectionUrl;
1850 }
1851
1852 public void resetEverything() {
1853 resetAttemptCount(true);
1854 resetStreamId();
1855 clearIqCallbacks();
1856 synchronized (this.mStanzaQueue) {
1857 this.stanzasSent = 0;
1858 this.mStanzaQueue.clear();
1859 }
1860 this.redirectionUrl = null;
1861 synchronized (this.disco) {
1862 disco.clear();
1863 }
1864 synchronized (this.commands) {
1865 this.commands.clear();
1866 }
1867 this.loginInfo = null;
1868 }
1869
1870 private void sendBindRequest() {
1871 try {
1872 mXmppConnectionService.restoredFromDatabaseLatch.await();
1873 } catch (InterruptedException e) {
1874 Log.d(
1875 Config.LOGTAG,
1876 account.getJid().asBareJid()
1877 + ": interrupted while waiting for DB restore during bind");
1878 return;
1879 }
1880 clearIqCallbacks();
1881 if (account.getJid().isBareJid()) {
1882 account.setResource(this.createNewResource());
1883 } else {
1884 fixResource(mXmppConnectionService, account);
1885 }
1886 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1887 final String resource =
1888 Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1889 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1890 this.sendUnmodifiedIqPacket(
1891 iq,
1892 (account, packet) -> {
1893 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1894 return;
1895 }
1896 final Element bind = packet.findChild("bind");
1897 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1898 isBound = true;
1899 final Element jid = bind.findChild("jid");
1900 if (jid != null && jid.getContent() != null) {
1901 try {
1902 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1903 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1904 Log.d(
1905 Config.LOGTAG,
1906 account.getJid().asBareJid()
1907 + ": server tried to re-assign domain to "
1908 + assignedJid.getDomain());
1909 throw new StateChangingError(Account.State.BIND_FAILURE);
1910 }
1911 if (account.setJid(assignedJid)) {
1912 Log.d(
1913 Config.LOGTAG,
1914 account.getJid().asBareJid()
1915 + ": jid changed during bind. updating database");
1916 mXmppConnectionService.databaseBackend.updateAccount(account);
1917 }
1918 if (streamFeatures.hasChild("session")
1919 && !streamFeatures
1920 .findChild("session")
1921 .hasChild("optional")) {
1922 sendStartSession();
1923 } else {
1924 final boolean waitForDisco = enableStreamManagement();
1925 sendPostBindInitialization(waitForDisco, false);
1926 }
1927 return;
1928 } catch (final IllegalArgumentException e) {
1929 Log.d(
1930 Config.LOGTAG,
1931 account.getJid().asBareJid()
1932 + ": server reported invalid jid ("
1933 + jid.getContent()
1934 + ") on bind");
1935 }
1936 } else {
1937 Log.d(
1938 Config.LOGTAG,
1939 account.getJid()
1940 + ": disconnecting because of bind failure. (no jid)");
1941 }
1942 } else {
1943 Log.d(
1944 Config.LOGTAG,
1945 account.getJid()
1946 + ": disconnecting because of bind failure ("
1947 + packet);
1948 }
1949 final Element error = packet.findChild("error");
1950 if (packet.getType() == IqPacket.TYPE.ERROR
1951 && error != null
1952 && error.hasChild("conflict")) {
1953 account.setResource(createNewResource());
1954 }
1955 throw new StateChangingError(Account.State.BIND_FAILURE);
1956 },
1957 true);
1958 }
1959
1960 private void clearIqCallbacks() {
1961 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1962 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1963 synchronized (this.packetCallbacks) {
1964 if (this.packetCallbacks.size() == 0) {
1965 return;
1966 }
1967 Log.d(
1968 Config.LOGTAG,
1969 account.getJid().asBareJid()
1970 + ": clearing "
1971 + this.packetCallbacks.size()
1972 + " iq callbacks");
1973 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator =
1974 this.packetCallbacks.values().iterator();
1975 while (iterator.hasNext()) {
1976 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1977 callbacks.add(entry.second);
1978 iterator.remove();
1979 }
1980 }
1981 for (OnIqPacketReceived callback : callbacks) {
1982 try {
1983 callback.onIqPacketReceived(account, failurePacket);
1984 } catch (StateChangingError error) {
1985 Log.d(
1986 Config.LOGTAG,
1987 account.getJid().asBareJid()
1988 + ": caught StateChangingError("
1989 + error.state.toString()
1990 + ") while clearing callbacks");
1991 // ignore
1992 }
1993 }
1994 Log.d(
1995 Config.LOGTAG,
1996 account.getJid().asBareJid()
1997 + ": done clearing iq callbacks. "
1998 + this.packetCallbacks.size()
1999 + " left");
2000 }
2001
2002 public void sendDiscoTimeout() {
2003 if (mWaitForDisco.compareAndSet(true, false)) {
2004 Log.d(
2005 Config.LOGTAG,
2006 account.getJid().asBareJid() + ": finalizing bind after disco timeout");
2007 finalizeBind();
2008 }
2009 }
2010
2011 private void sendStartSession() {
2012 Log.d(
2013 Config.LOGTAG,
2014 account.getJid().asBareJid() + ": sending legacy session to outdated server");
2015 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
2016 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
2017 this.sendUnmodifiedIqPacket(
2018 startSession,
2019 (account, packet) -> {
2020 if (packet.getType() == IqPacket.TYPE.RESULT) {
2021 final boolean waitForDisco = enableStreamManagement();
2022 sendPostBindInitialization(waitForDisco, false);
2023 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2024 throw new StateChangingError(Account.State.SESSION_FAILURE);
2025 }
2026 },
2027 true);
2028 }
2029
2030 private boolean enableStreamManagement() {
2031 final boolean streamManagement =
2032 this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT);
2033 if (streamManagement) {
2034 synchronized (this.mStanzaQueue) {
2035 final EnablePacket enable = new EnablePacket();
2036 tagWriter.writeStanzaAsync(enable);
2037 stanzasSent = 0;
2038 mStanzaQueue.clear();
2039 }
2040 return true;
2041 } else {
2042 return false;
2043 }
2044 }
2045
2046 private void sendPostBindInitialization(
2047 final boolean waitForDisco, final boolean carbonsEnabled) {
2048 features.carbonsEnabled = carbonsEnabled;
2049 features.blockListRequested = false;
2050 synchronized (this.disco) {
2051 this.disco.clear();
2052 }
2053 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
2054 mPendingServiceDiscoveries.set(0);
2055 mWaitForDisco.set(waitForDisco);
2056 lastDiscoStarted = SystemClock.elapsedRealtime();
2057 mXmppConnectionService.scheduleWakeUpCall(
2058 Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
2059 final Element caps = streamFeatures.findChild("c");
2060 final String hash = caps == null ? null : caps.getAttribute("hash");
2061 final String ver = caps == null ? null : caps.getAttribute("ver");
2062 ServiceDiscoveryResult discoveryResult = null;
2063 if (hash != null && ver != null) {
2064 discoveryResult =
2065 mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
2066 }
2067 final boolean requestDiscoItemsFirst =
2068 !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
2069 if (requestDiscoItemsFirst) {
2070 sendServiceDiscoveryItems(account.getDomain());
2071 }
2072 if (discoveryResult == null) {
2073 sendServiceDiscoveryInfo(account.getDomain());
2074 } else {
2075 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
2076 disco.put(account.getDomain(), discoveryResult);
2077 }
2078 discoverMamPreferences();
2079 sendServiceDiscoveryInfo(account.getJid().asBareJid());
2080 if (!requestDiscoItemsFirst) {
2081 sendServiceDiscoveryItems(account.getDomain());
2082 }
2083
2084 if (!mWaitForDisco.get()) {
2085 finalizeBind();
2086 }
2087 this.lastSessionStarted = SystemClock.elapsedRealtime();
2088 }
2089
2090 private void sendServiceDiscoveryInfo(final Jid jid) {
2091 mPendingServiceDiscoveries.incrementAndGet();
2092 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2093 iq.setTo(jid);
2094 iq.query("http://jabber.org/protocol/disco#info");
2095 this.sendIqPacket(
2096 iq,
2097 (account, packet) -> {
2098 if (packet.getType() == IqPacket.TYPE.RESULT) {
2099 boolean advancedStreamFeaturesLoaded;
2100 synchronized (XmppConnection.this.disco) {
2101 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
2102 if (jid.equals(account.getDomain())) {
2103 mXmppConnectionService.databaseBackend.insertDiscoveryResult(
2104 result);
2105 }
2106 disco.put(jid, result);
2107 advancedStreamFeaturesLoaded =
2108 disco.containsKey(account.getDomain())
2109 && disco.containsKey(account.getJid().asBareJid());
2110 }
2111 if (advancedStreamFeaturesLoaded
2112 && (jid.equals(account.getDomain())
2113 || jid.equals(account.getJid().asBareJid()))) {
2114 enableAdvancedStreamFeatures();
2115 }
2116 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
2117 Log.d(
2118 Config.LOGTAG,
2119 account.getJid().asBareJid()
2120 + ": could not query disco info for "
2121 + jid.toString());
2122 final boolean serverOrAccount =
2123 jid.equals(account.getDomain())
2124 || jid.equals(account.getJid().asBareJid());
2125 final boolean advancedStreamFeaturesLoaded;
2126 if (serverOrAccount) {
2127 synchronized (XmppConnection.this.disco) {
2128 disco.put(jid, ServiceDiscoveryResult.empty());
2129 advancedStreamFeaturesLoaded =
2130 disco.containsKey(account.getDomain())
2131 && disco.containsKey(account.getJid().asBareJid());
2132 }
2133 } else {
2134 advancedStreamFeaturesLoaded = false;
2135 }
2136 if (advancedStreamFeaturesLoaded) {
2137 enableAdvancedStreamFeatures();
2138 }
2139 }
2140 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2141 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2142 && mWaitForDisco.compareAndSet(true, false)) {
2143 finalizeBind();
2144 }
2145 }
2146 });
2147 }
2148
2149 private void discoverMamPreferences() {
2150 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2151 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
2152 sendIqPacket(
2153 request,
2154 (account, response) -> {
2155 if (response.getType() == IqPacket.TYPE.RESULT) {
2156 Element prefs =
2157 response.findChild(
2158 "prefs", MessageArchiveService.Version.MAM_2.namespace);
2159 isMamPreferenceAlways =
2160 "always"
2161 .equals(
2162 prefs == null
2163 ? null
2164 : prefs.getAttribute("default"));
2165 }
2166 });
2167 }
2168
2169 private void discoverCommands() {
2170 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
2171 request.setTo(account.getDomain());
2172 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
2173 sendIqPacket(
2174 request,
2175 (account, response) -> {
2176 if (response.getType() == IqPacket.TYPE.RESULT) {
2177 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
2178 if (query == null) {
2179 return;
2180 }
2181 final HashMap<String, Jid> commands = new HashMap<>();
2182 for (final Element child : query.getChildren()) {
2183 if ("item".equals(child.getName())) {
2184 final String node = child.getAttribute("node");
2185 final Jid jid = child.getAttributeAsJid("jid");
2186 if (node != null && jid != null) {
2187 commands.put(node, jid);
2188 }
2189 }
2190 }
2191 synchronized (this.commands) {
2192 this.commands.clear();
2193 this.commands.putAll(commands);
2194 }
2195 }
2196 });
2197 }
2198
2199 public boolean isMamPreferenceAlways() {
2200 return isMamPreferenceAlways;
2201 }
2202
2203 private void finalizeBind() {
2204 this.offlineMessagesRetrieved = false;
2205 if (bindListener != null) {
2206 bindListener.onBind(account);
2207 }
2208 changeStatusToOnline();
2209 }
2210
2211 private void enableAdvancedStreamFeatures() {
2212 if (getFeatures().blocking() && !features.blockListRequested) {
2213 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
2214 this.sendIqPacket(
2215 getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
2216 }
2217 for (final OnAdvancedStreamFeaturesLoaded listener :
2218 advancedStreamFeaturesLoadedListeners) {
2219 listener.onAdvancedStreamFeaturesAvailable(account);
2220 }
2221 if (getFeatures().carbons() && !features.carbonsEnabled) {
2222 sendEnableCarbons();
2223 }
2224 if (getFeatures().commands()) {
2225 discoverCommands();
2226 }
2227 }
2228
2229 private void sendServiceDiscoveryItems(final Jid server) {
2230 mPendingServiceDiscoveries.incrementAndGet();
2231 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2232 iq.setTo(server.getDomain());
2233 iq.query("http://jabber.org/protocol/disco#items");
2234 this.sendIqPacket(
2235 iq,
2236 (account, packet) -> {
2237 if (packet.getType() == IqPacket.TYPE.RESULT) {
2238 final HashSet<Jid> items = new HashSet<>();
2239 final List<Element> elements = packet.query().getChildren();
2240 for (final Element element : elements) {
2241 if (element.getName().equals("item")) {
2242 final Jid jid =
2243 InvalidJid.getNullForInvalid(
2244 element.getAttributeAsJid("jid"));
2245 if (jid != null && !jid.equals(account.getDomain())) {
2246 items.add(jid);
2247 }
2248 }
2249 }
2250 for (Jid jid : items) {
2251 sendServiceDiscoveryInfo(jid);
2252 }
2253 } else {
2254 Log.d(
2255 Config.LOGTAG,
2256 account.getJid().asBareJid()
2257 + ": could not query disco items of "
2258 + server);
2259 }
2260 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2261 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2262 && mWaitForDisco.compareAndSet(true, false)) {
2263 finalizeBind();
2264 }
2265 }
2266 });
2267 }
2268
2269 private void sendEnableCarbons() {
2270 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
2271 iq.addChild("enable", Namespace.CARBONS);
2272 this.sendIqPacket(
2273 iq,
2274 (account, packet) -> {
2275 if (packet.getType() == IqPacket.TYPE.RESULT) {
2276 Log.d(
2277 Config.LOGTAG,
2278 account.getJid().asBareJid() + ": successfully enabled carbons");
2279 features.carbonsEnabled = true;
2280 } else {
2281 Log.d(
2282 Config.LOGTAG,
2283 account.getJid().asBareJid()
2284 + ": could not enable carbons "
2285 + packet);
2286 }
2287 });
2288 }
2289
2290 private void processStreamError(final Tag currentTag) throws IOException {
2291 final Element streamError = tagReader.readElement(currentTag);
2292 if (streamError == null) {
2293 return;
2294 }
2295 if (streamError.hasChild("conflict")) {
2296 account.setResource(createNewResource());
2297 Log.d(
2298 Config.LOGTAG,
2299 account.getJid().asBareJid()
2300 + ": switching resource due to conflict ("
2301 + account.getResource()
2302 + ")");
2303 throw new IOException();
2304 } else if (streamError.hasChild("host-unknown")) {
2305 throw new StateChangingException(Account.State.HOST_UNKNOWN);
2306 } else if (streamError.hasChild("policy-violation")) {
2307 this.lastConnect = SystemClock.elapsedRealtime();
2308 final String text = streamError.findChildContent("text");
2309 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
2310 failPendingMessages(text);
2311 throw new StateChangingException(Account.State.POLICY_VIOLATION);
2312 } else if (streamError.hasChild("see-other-host")) {
2313 final String seeOtherHost = streamError.findChildContent("see-other-host");
2314 final Resolver.Result currentResolverResult = this.currentResolverResult;
2315 if (Strings.isNullOrEmpty(seeOtherHost) || currentResolverResult == null) {
2316 Log.d(
2317 Config.LOGTAG,
2318 account.getJid().asBareJid() + ": stream error " + streamError);
2319 throw new StateChangingException(Account.State.STREAM_ERROR);
2320 }
2321 Log.d(
2322 Config.LOGTAG,
2323 account.getJid().asBareJid()
2324 + ": see other host: "
2325 + seeOtherHost
2326 + " "
2327 + currentResolverResult);
2328 final Resolver.Result seeOtherResult = currentResolverResult.seeOtherHost(seeOtherHost);
2329 if (seeOtherResult != null) {
2330 this.seeOtherHostResolverResult = seeOtherResult;
2331 throw new StateChangingException(Account.State.SEE_OTHER_HOST);
2332 } else {
2333 throw new StateChangingException(Account.State.STREAM_ERROR);
2334 }
2335 } else {
2336 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
2337 throw new StateChangingException(Account.State.STREAM_ERROR);
2338 }
2339 }
2340
2341 private void failPendingMessages(final String error) {
2342 synchronized (this.mStanzaQueue) {
2343 for (int i = 0; i < mStanzaQueue.size(); ++i) {
2344 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
2345 if (stanza instanceof MessagePacket packet) {
2346 final String id = packet.getId();
2347 final Jid to = packet.getTo();
2348 mXmppConnectionService.markMessage(
2349 account, to.asBareJid(), id, Message.STATUS_SEND_FAILED, error);
2350 }
2351 }
2352 }
2353 }
2354
2355 private boolean establishStream(final SSLSockets.Version sslVersion)
2356 throws IOException, InterruptedException {
2357 final boolean secureConnection = sslVersion != SSLSockets.Version.NONE;
2358 final SaslMechanism quickStartMechanism;
2359 if (secureConnection) {
2360 quickStartMechanism =
2361 SaslMechanism.ensureAvailable(account.getQuickStartMechanism(), sslVersion);
2362 } else {
2363 quickStartMechanism = null;
2364 }
2365 if (secureConnection
2366 && Config.QUICKSTART_ENABLED
2367 && quickStartMechanism != null
2368 && account.isOptionSet(Account.OPTION_QUICKSTART_AVAILABLE)) {
2369 mXmppConnectionService.restoredFromDatabaseLatch.await();
2370 this.loginInfo =
2371 new LoginInfo(
2372 quickStartMechanism,
2373 SaslMechanism.Version.SASL_2,
2374 Bind2.QUICKSTART_FEATURES);
2375 final boolean usingFast = quickStartMechanism instanceof HashedToken;
2376 final Element authenticate =
2377 generateAuthenticationRequest(
2378 quickStartMechanism.getClientFirstMessage(sslSocketOrNull(this.socket)),
2379 usingFast);
2380 authenticate.setAttribute("mechanism", quickStartMechanism.getMechanism());
2381 sendStartStream(true, false);
2382 synchronized (this.mStanzaQueue) {
2383 this.stanzasSentBeforeAuthentication = this.stanzasSent;
2384 tagWriter.writeElement(authenticate);
2385 }
2386 Log.d(
2387 Config.LOGTAG,
2388 account.getJid().toString()
2389 + ": quick start with "
2390 + quickStartMechanism.getMechanism());
2391 return true;
2392 } else {
2393 sendStartStream(secureConnection, true);
2394 return false;
2395 }
2396 }
2397
2398 private void sendStartStream(final boolean from, final boolean flush) throws IOException {
2399 final Tag stream = Tag.start("stream:stream");
2400 stream.setAttribute("to", account.getServer());
2401 if (from) {
2402 stream.setAttribute("from", account.getJid().asBareJid().toEscapedString());
2403 }
2404 stream.setAttribute("version", "1.0");
2405 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
2406 stream.setAttribute("xmlns", Namespace.JABBER_CLIENT);
2407 stream.setAttribute("xmlns:stream", Namespace.STREAMS);
2408 tagWriter.writeTag(stream, flush);
2409 }
2410
2411 private String createNewResource() {
2412 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
2413 }
2414
2415 private String nextRandomId() {
2416 return nextRandomId(false);
2417 }
2418
2419 private String nextRandomId(final boolean s) {
2420 return CryptoHelper.random(s ? 3 : 9);
2421 }
2422
2423 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
2424 packet.setFrom(account.getJid());
2425 return this.sendUnmodifiedIqPacket(packet, callback, false);
2426 }
2427
2428 public synchronized String sendUnmodifiedIqPacket(
2429 final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
2430 if (packet.getId() == null) {
2431 packet.setAttribute("id", nextRandomId());
2432 }
2433 if (callback != null) {
2434 synchronized (this.packetCallbacks) {
2435 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
2436 }
2437 }
2438 this.sendPacket(packet, force);
2439 return packet.getId();
2440 }
2441
2442 public void sendMessagePacket(final MessagePacket packet) {
2443 this.sendPacket(packet);
2444 }
2445
2446 public void sendPresencePacket(final PresencePacket packet) {
2447 this.sendPacket(packet);
2448 }
2449
2450 private synchronized void sendPacket(final AbstractStanza packet) {
2451 sendPacket(packet, false);
2452 }
2453
2454 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
2455 if (stanzasSent == Integer.MAX_VALUE) {
2456 resetStreamId();
2457 disconnect(true);
2458 return;
2459 }
2460 synchronized (this.mStanzaQueue) {
2461 if (force || isBound) {
2462 tagWriter.writeStanzaAsync(packet);
2463 } else {
2464 Log.d(
2465 Config.LOGTAG,
2466 account.getJid().asBareJid()
2467 + " do not write stanza to unbound stream "
2468 + packet.toString());
2469 }
2470 if (packet instanceof AbstractAcknowledgeableStanza stanza) {
2471 if (this.mStanzaQueue.size() != 0) {
2472 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
2473 if (currentHighestKey != stanzasSent) {
2474 throw new AssertionError("Stanza count messed up");
2475 }
2476 }
2477
2478 ++stanzasSent;
2479 if (Config.EXTENDED_SM_LOGGING) {
2480 Log.d(
2481 Config.LOGTAG,
2482 account.getJid().asBareJid()
2483 + ": counting outbound "
2484 + packet.getName()
2485 + " as #"
2486 + stanzasSent);
2487 }
2488 this.mStanzaQueue.append(stanzasSent, stanza);
2489 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
2490 if (Config.EXTENDED_SM_LOGGING) {
2491 Log.d(
2492 Config.LOGTAG,
2493 account.getJid().asBareJid()
2494 + ": requesting ack for message stanza #"
2495 + stanzasSent);
2496 }
2497 tagWriter.writeStanzaAsync(new RequestPacket());
2498 }
2499 }
2500 }
2501 }
2502
2503 public void sendPing() {
2504 if (!r()) {
2505 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2506 iq.setFrom(account.getJid());
2507 iq.addChild("ping", Namespace.PING);
2508 this.sendIqPacket(iq, null);
2509 }
2510 this.lastPingSent = SystemClock.elapsedRealtime();
2511 }
2512
2513 public void setOnMessagePacketReceivedListener(final OnMessagePacketReceived listener) {
2514 this.messageListener = listener;
2515 }
2516
2517 public void setOnUnregisteredIqPacketReceivedListener(final OnIqPacketReceived listener) {
2518 this.unregisteredIqListener = listener;
2519 }
2520
2521 public void setOnPresencePacketReceivedListener(final OnPresencePacketReceived listener) {
2522 this.presenceListener = listener;
2523 }
2524
2525 public void setOnJinglePacketReceivedListener(final OnJinglePacketReceived listener) {
2526 this.jingleListener = listener;
2527 }
2528
2529 public void setOnStatusChangedListener(final OnStatusChanged listener) {
2530 this.statusListener = listener;
2531 }
2532
2533 public void setOnBindListener(final OnBindListener listener) {
2534 this.bindListener = listener;
2535 }
2536
2537 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
2538 this.acknowledgedListener = listener;
2539 }
2540
2541 public void addOnAdvancedStreamFeaturesAvailableListener(
2542 final OnAdvancedStreamFeaturesLoaded listener) {
2543 this.advancedStreamFeaturesLoadedListeners.add(listener);
2544 }
2545
2546 private void forceCloseSocket() {
2547 FileBackend.close(this.socket);
2548 FileBackend.close(this.tagReader);
2549 }
2550
2551 public void interrupt() {
2552 if (this.mThread != null) {
2553 this.mThread.interrupt();
2554 }
2555 }
2556
2557 public void disconnect(final boolean force) {
2558 interrupt();
2559 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
2560 if (force) {
2561 forceCloseSocket();
2562 } else {
2563 final TagWriter currentTagWriter = this.tagWriter;
2564 if (currentTagWriter.isActive()) {
2565 currentTagWriter.finish();
2566 final Socket currentSocket = this.socket;
2567 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
2568 try {
2569 currentTagWriter.await(1, TimeUnit.SECONDS);
2570 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
2571 currentTagWriter.writeTag(Tag.end("stream:stream"));
2572 if (streamCountDownLatch != null) {
2573 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
2574 Log.d(
2575 Config.LOGTAG,
2576 account.getJid().asBareJid() + ": remote ended stream");
2577 } else {
2578 Log.d(
2579 Config.LOGTAG,
2580 account.getJid().asBareJid()
2581 + ": remote has not closed socket. force closing");
2582 }
2583 }
2584 } catch (InterruptedException e) {
2585 Log.d(
2586 Config.LOGTAG,
2587 account.getJid().asBareJid()
2588 + ": interrupted while gracefully closing stream");
2589 } catch (final IOException e) {
2590 Log.d(
2591 Config.LOGTAG,
2592 account.getJid().asBareJid()
2593 + ": io exception during disconnect ("
2594 + e.getMessage()
2595 + ")");
2596 } finally {
2597 FileBackend.close(currentSocket);
2598 }
2599 } else {
2600 forceCloseSocket();
2601 }
2602 }
2603 }
2604
2605 private void resetStreamId() {
2606 this.streamId = null;
2607 this.boundStreamFeatures = null;
2608 }
2609
2610 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
2611 synchronized (this.disco) {
2612 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
2613 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
2614 if (cursor.getValue().getFeatures().contains(feature)) {
2615 items.add(cursor);
2616 }
2617 }
2618 return items;
2619 }
2620 }
2621
2622 public Jid findDiscoItemByFeature(final String feature) {
2623 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
2624 if (items.size() >= 1) {
2625 return items.get(0).getKey();
2626 }
2627 return null;
2628 }
2629
2630 public boolean r() {
2631 if (getFeatures().sm()) {
2632 this.tagWriter.writeStanzaAsync(new RequestPacket());
2633 return true;
2634 } else {
2635 return false;
2636 }
2637 }
2638
2639 public List<String> getMucServersWithholdAccount() {
2640 final List<String> servers = getMucServers();
2641 servers.remove(account.getDomain().toEscapedString());
2642 return servers;
2643 }
2644
2645 public List<String> getMucServers() {
2646 List<String> servers = new ArrayList<>();
2647 synchronized (this.disco) {
2648 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
2649 final ServiceDiscoveryResult value = cursor.getValue();
2650 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
2651 && value.hasIdentity("conference", "text")
2652 && !value.getFeatures().contains("jabber:iq:gateway")
2653 && !value.hasIdentity("conference", "irc")) {
2654 servers.add(cursor.getKey().toString());
2655 }
2656 }
2657 }
2658 return servers;
2659 }
2660
2661 public String getMucServer() {
2662 List<String> servers = getMucServers();
2663 return servers.size() > 0 ? servers.get(0) : null;
2664 }
2665
2666 public int getTimeToNextAttempt(final boolean aggressive) {
2667 final int interval;
2668 if (aggressive) {
2669 interval = Math.min((int) (3 * Math.pow(1.3, attempt)), 60);
2670 } else {
2671 final int additionalTime =
2672 account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
2673 interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
2674 }
2675 final int secondsSinceLast =
2676 (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
2677 return interval - secondsSinceLast;
2678 }
2679
2680 public int getAttempt() {
2681 return this.attempt;
2682 }
2683
2684 public Features getFeatures() {
2685 return this.features;
2686 }
2687
2688 public long getLastSessionEstablished() {
2689 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
2690 return System.currentTimeMillis() - diff;
2691 }
2692
2693 public long getLastConnect() {
2694 return this.lastConnect;
2695 }
2696
2697 public long getLastPingSent() {
2698 return this.lastPingSent;
2699 }
2700
2701 public long getLastDiscoStarted() {
2702 return this.lastDiscoStarted;
2703 }
2704
2705 public long getLastPacketReceived() {
2706 return this.lastPacketReceived;
2707 }
2708
2709 public void sendActive() {
2710 this.sendPacket(new ActivePacket());
2711 }
2712
2713 public void sendInactive() {
2714 this.sendPacket(new InactivePacket());
2715 }
2716
2717 public void resetAttemptCount(boolean resetConnectTime) {
2718 this.attempt = 0;
2719 if (resetConnectTime) {
2720 this.lastConnect = 0;
2721 }
2722 }
2723
2724 public void setInteractive(boolean interactive) {
2725 this.mInteractive = interactive;
2726 }
2727
2728 private IqGenerator getIqGenerator() {
2729 return mXmppConnectionService.getIqGenerator();
2730 }
2731
2732 public void trackOfflineMessageRetrieval(boolean trackOfflineMessageRetrieval) {
2733 if (trackOfflineMessageRetrieval) {
2734 final IqPacket iqPing = new IqPacket(IqPacket.TYPE.GET);
2735 iqPing.addChild("ping", Namespace.PING);
2736 this.sendIqPacket(
2737 iqPing,
2738 (a, response) -> {
2739 Log.d(
2740 Config.LOGTAG,
2741 account.getJid().asBareJid()
2742 + ": got ping response after sending initial presence");
2743 XmppConnection.this.offlineMessagesRetrieved = true;
2744 });
2745 } else {
2746 this.offlineMessagesRetrieved = true;
2747 }
2748 }
2749
2750 public boolean isOfflineMessagesRetrieved() {
2751 return this.offlineMessagesRetrieved;
2752 }
2753
2754 private class MyKeyManager implements X509KeyManager {
2755 @Override
2756 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
2757 return account.getPrivateKeyAlias();
2758 }
2759
2760 @Override
2761 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
2762 return null;
2763 }
2764
2765 @Override
2766 public X509Certificate[] getCertificateChain(String alias) {
2767 Log.d(Config.LOGTAG, "getting certificate chain");
2768 try {
2769 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
2770 } catch (final Exception e) {
2771 Log.d(Config.LOGTAG, "could not get certificate chain", e);
2772 return new X509Certificate[0];
2773 }
2774 }
2775
2776 @Override
2777 public String[] getClientAliases(String s, Principal[] principals) {
2778 final String alias = account.getPrivateKeyAlias();
2779 return alias != null ? new String[] {alias} : new String[0];
2780 }
2781
2782 @Override
2783 public String[] getServerAliases(String s, Principal[] principals) {
2784 return new String[0];
2785 }
2786
2787 @Override
2788 public PrivateKey getPrivateKey(String alias) {
2789 try {
2790 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
2791 } catch (Exception e) {
2792 return null;
2793 }
2794 }
2795 }
2796
2797 private static class LoginInfo {
2798 public final SaslMechanism saslMechanism;
2799 public final SaslMechanism.Version saslVersion;
2800 public final List<String> inlineBindFeatures;
2801 public final AtomicBoolean success = new AtomicBoolean(false);
2802
2803 private LoginInfo(
2804 final SaslMechanism saslMechanism,
2805 final SaslMechanism.Version saslVersion,
2806 final Collection<String> inlineBindFeatures) {
2807 Preconditions.checkNotNull(saslMechanism, "SASL Mechanism must not be null");
2808 Preconditions.checkNotNull(saslVersion, "SASL version must not be null");
2809 this.saslMechanism = saslMechanism;
2810 this.saslVersion = saslVersion;
2811 this.inlineBindFeatures =
2812 inlineBindFeatures == null
2813 ? Collections.emptyList()
2814 : ImmutableList.copyOf(inlineBindFeatures);
2815 }
2816
2817 public static SaslMechanism mechanism(final LoginInfo loginInfo) {
2818 return loginInfo == null ? null : loginInfo.saslMechanism;
2819 }
2820
2821 public void success(final String challenge, final SSLSocket sslSocket)
2822 throws SaslMechanism.AuthenticationException {
2823 final var response = this.saslMechanism.getResponse(challenge, sslSocket);
2824 if (!Strings.isNullOrEmpty(response)) {
2825 throw new SaslMechanism.AuthenticationException(
2826 "processing success yielded another response");
2827 }
2828 if (this.success.compareAndSet(false, true)) {
2829 return;
2830 }
2831 throw new SaslMechanism.AuthenticationException("Process 'success' twice");
2832 }
2833
2834 public static boolean isSuccess(final LoginInfo loginInfo) {
2835 return loginInfo != null && loginInfo.success.get();
2836 }
2837 }
2838
2839 private static class StreamId {
2840 public final String id;
2841 public final Resolver.Result location;
2842
2843 private StreamId(String id, Resolver.Result location) {
2844 this.id = id;
2845 this.location = location;
2846 }
2847
2848 @NonNull
2849 @Override
2850 public String toString() {
2851 return MoreObjects.toStringHelper(this)
2852 .add("id", id)
2853 .add("location", location)
2854 .toString();
2855 }
2856 }
2857
2858 private static class StateChangingError extends Error {
2859 private final Account.State state;
2860
2861 public StateChangingError(Account.State state) {
2862 this.state = state;
2863 }
2864 }
2865
2866 private static class StateChangingException extends IOException {
2867 private final Account.State state;
2868
2869 public StateChangingException(Account.State state) {
2870 this.state = state;
2871 }
2872 }
2873
2874 public class Features {
2875 XmppConnection connection;
2876 private boolean carbonsEnabled = false;
2877 private boolean encryptionEnabled = false;
2878 private boolean blockListRequested = false;
2879
2880 public Features(final XmppConnection connection) {
2881 this.connection = connection;
2882 }
2883
2884 private boolean hasDiscoFeature(final Jid server, final String feature) {
2885 synchronized (XmppConnection.this.disco) {
2886 final ServiceDiscoveryResult sdr = connection.disco.get(server);
2887 return sdr != null && sdr.getFeatures().contains(feature);
2888 }
2889 }
2890
2891 public boolean carbons() {
2892 return hasDiscoFeature(account.getDomain(), Namespace.CARBONS);
2893 }
2894
2895 public boolean commands() {
2896 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2897 }
2898
2899 public boolean easyOnboardingInvites() {
2900 synchronized (commands) {
2901 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2902 }
2903 }
2904
2905 public boolean bookmarksConversion() {
2906 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION)
2907 && pepPublishOptions();
2908 }
2909
2910 public boolean blocking() {
2911 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2912 }
2913
2914 public boolean spamReporting() {
2915 return hasDiscoFeature(account.getDomain(), Namespace.REPORTING);
2916 }
2917
2918 public boolean flexibleOfflineMessageRetrieval() {
2919 return hasDiscoFeature(
2920 account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2921 }
2922
2923 public boolean register() {
2924 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2925 }
2926
2927 public boolean invite() {
2928 return connection.streamFeatures != null
2929 && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2930 }
2931
2932 public boolean sm() {
2933 return streamId != null
2934 || (connection.streamFeatures != null
2935 && connection.streamFeatures.hasChild(
2936 "sm", Namespace.STREAM_MANAGEMENT));
2937 }
2938
2939 public boolean csi() {
2940 return connection.streamFeatures != null
2941 && connection.streamFeatures.hasChild("csi", Namespace.CSI);
2942 }
2943
2944 public boolean pep() {
2945 synchronized (XmppConnection.this.disco) {
2946 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2947 return info != null && info.hasIdentity("pubsub", "pep");
2948 }
2949 }
2950
2951 public boolean pepPersistent() {
2952 synchronized (XmppConnection.this.disco) {
2953 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2954 return info != null
2955 && info.getFeatures()
2956 .contains("http://jabber.org/protocol/pubsub#persistent-items");
2957 }
2958 }
2959
2960 public boolean pepPublishOptions() {
2961 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2962 }
2963
2964 public boolean pepOmemoWhitelisted() {
2965 return hasDiscoFeature(
2966 account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2967 }
2968
2969 public boolean mam() {
2970 return MessageArchiveService.Version.has(getAccountFeatures());
2971 }
2972
2973 public List<String> getAccountFeatures() {
2974 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2975 return result == null ? Collections.emptyList() : result.getFeatures();
2976 }
2977
2978 public boolean push() {
2979 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2980 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2981 }
2982
2983 public boolean rosterVersioning() {
2984 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2985 }
2986
2987 public void setBlockListRequested(boolean value) {
2988 this.blockListRequested = value;
2989 }
2990
2991 public boolean httpUpload(long filesize) {
2992 if (Config.DISABLE_HTTP_UPLOAD) {
2993 return false;
2994 } else {
2995 for (String namespace :
2996 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2997 List<Entry<Jid, ServiceDiscoveryResult>> items =
2998 findDiscoItemsByFeature(namespace);
2999 if (items.size() > 0) {
3000 try {
3001 long maxsize =
3002 Long.parseLong(
3003 items.get(0)
3004 .getValue()
3005 .getExtendedDiscoInformation(
3006 namespace, "max-file-size"));
3007 if (filesize <= maxsize) {
3008 return true;
3009 } else {
3010 Log.d(
3011 Config.LOGTAG,
3012 account.getJid().asBareJid()
3013 + ": http upload is not available for files with size "
3014 + filesize
3015 + " (max is "
3016 + maxsize
3017 + ")");
3018 return false;
3019 }
3020 } catch (Exception e) {
3021 return true;
3022 }
3023 }
3024 }
3025 return false;
3026 }
3027 }
3028
3029 public boolean useLegacyHttpUpload() {
3030 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null
3031 && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
3032 }
3033
3034 public long getMaxHttpUploadSize() {
3035 for (String namespace :
3036 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
3037 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
3038 if (items.size() > 0) {
3039 try {
3040 return Long.parseLong(
3041 items.get(0)
3042 .getValue()
3043 .getExtendedDiscoInformation(namespace, "max-file-size"));
3044 } catch (Exception e) {
3045 // ignored
3046 }
3047 }
3048 }
3049 return -1;
3050 }
3051
3052 public boolean stanzaIds() {
3053 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
3054 }
3055
3056 public boolean bookmarks2() {
3057 return pepPublishOptions()
3058 && hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT);
3059 }
3060
3061 public boolean externalServiceDiscovery() {
3062 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
3063 }
3064 }
3065}