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.SystemClock;
9import android.security.KeyChain;
10import android.util.Base64;
11import android.util.Log;
12import android.util.Pair;
13import android.util.SparseArray;
14
15import androidx.annotation.NonNull;
16
17import com.google.common.base.Predicates;
18import com.google.common.base.Strings;
19import com.google.common.collect.Collections2;
20
21import org.xmlpull.v1.XmlPullParserException;
22
23import java.io.ByteArrayInputStream;
24import java.io.IOException;
25import java.io.InputStream;
26import java.net.ConnectException;
27import java.net.IDN;
28import java.net.InetAddress;
29import java.net.InetSocketAddress;
30import java.net.Socket;
31import java.net.UnknownHostException;
32import java.security.KeyManagementException;
33import java.security.NoSuchAlgorithmException;
34import java.security.Principal;
35import java.security.PrivateKey;
36import java.security.cert.X509Certificate;
37import java.util.ArrayList;
38import java.util.Arrays;
39import java.util.Collection;
40import java.util.Collections;
41import java.util.HashMap;
42import java.util.HashSet;
43import java.util.Hashtable;
44import java.util.Iterator;
45import java.util.List;
46import java.util.Map.Entry;
47import java.util.Set;
48import java.util.concurrent.CountDownLatch;
49import java.util.concurrent.TimeUnit;
50import java.util.concurrent.atomic.AtomicBoolean;
51import java.util.concurrent.atomic.AtomicInteger;
52import java.util.regex.Matcher;
53
54import javax.net.ssl.KeyManager;
55import javax.net.ssl.SSLContext;
56import javax.net.ssl.SSLPeerUnverifiedException;
57import javax.net.ssl.SSLSocket;
58import javax.net.ssl.SSLSocketFactory;
59import javax.net.ssl.X509KeyManager;
60import javax.net.ssl.X509TrustManager;
61
62import eu.siacs.conversations.Config;
63import eu.siacs.conversations.R;
64import eu.siacs.conversations.crypto.XmppDomainVerifier;
65import eu.siacs.conversations.crypto.axolotl.AxolotlService;
66import eu.siacs.conversations.crypto.sasl.ChannelBinding;
67import eu.siacs.conversations.crypto.sasl.SaslMechanism;
68import eu.siacs.conversations.entities.Account;
69import eu.siacs.conversations.entities.Message;
70import eu.siacs.conversations.entities.ServiceDiscoveryResult;
71import eu.siacs.conversations.generator.IqGenerator;
72import eu.siacs.conversations.http.HttpConnectionManager;
73import eu.siacs.conversations.persistance.FileBackend;
74import eu.siacs.conversations.services.MemorizingTrustManager;
75import eu.siacs.conversations.services.MessageArchiveService;
76import eu.siacs.conversations.services.NotificationService;
77import eu.siacs.conversations.services.XmppConnectionService;
78import eu.siacs.conversations.utils.CryptoHelper;
79import eu.siacs.conversations.utils.Patterns;
80import eu.siacs.conversations.utils.Resolver;
81import eu.siacs.conversations.utils.SSLSocketHelper;
82import eu.siacs.conversations.utils.SocksSocketFactory;
83import eu.siacs.conversations.utils.XmlHelper;
84import eu.siacs.conversations.xml.Element;
85import eu.siacs.conversations.xml.LocalizedContent;
86import eu.siacs.conversations.xml.Namespace;
87import eu.siacs.conversations.xml.Tag;
88import eu.siacs.conversations.xml.TagWriter;
89import eu.siacs.conversations.xml.XmlReader;
90import eu.siacs.conversations.xmpp.forms.Data;
91import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
92import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
93import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
94import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
95import eu.siacs.conversations.xmpp.stanzas.IqPacket;
96import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
97import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
98import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
99import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
100import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
101import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
102import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
103import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
104import okhttp3.HttpUrl;
105
106public class XmppConnection implements Runnable {
107
108 private static final int PACKET_IQ = 0;
109 private static final int PACKET_MESSAGE = 1;
110 private static final int PACKET_PRESENCE = 2;
111 public final OnIqPacketReceived registrationResponseListener =
112 (account, packet) -> {
113 if (packet.getType() == IqPacket.TYPE.RESULT) {
114 account.setOption(Account.OPTION_REGISTER, false);
115 Log.d(
116 Config.LOGTAG,
117 account.getJid().asBareJid()
118 + ": successfully registered new account on server");
119 throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL);
120 } else {
121 final List<String> PASSWORD_TOO_WEAK_MSGS =
122 Arrays.asList(
123 "The password is too weak", "Please use a longer password.");
124 Element error = packet.findChild("error");
125 Account.State state = Account.State.REGISTRATION_FAILED;
126 if (error != null) {
127 if (error.hasChild("conflict")) {
128 state = Account.State.REGISTRATION_CONFLICT;
129 } else if (error.hasChild("resource-constraint")
130 && "wait".equals(error.getAttribute("type"))) {
131 state = Account.State.REGISTRATION_PLEASE_WAIT;
132 } else if (error.hasChild("not-acceptable")
133 && PASSWORD_TOO_WEAK_MSGS.contains(
134 error.findChildContent("text"))) {
135 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
136 }
137 }
138 throw new StateChangingError(state);
139 }
140 };
141 protected final Account account;
142 private final Features features = new Features(this);
143 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
144 private final HashMap<String, Jid> commands = new HashMap<>();
145 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
146 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks =
147 new Hashtable<>();
148 private final Set<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners =
149 new HashSet<>();
150 private final XmppConnectionService mXmppConnectionService;
151 private Socket socket;
152 private XmlReader tagReader;
153 private TagWriter tagWriter = new TagWriter();
154 private boolean shouldAuthenticate = true;
155 private boolean inSmacksSession = false;
156 private boolean isBound = false;
157 private Element streamFeatures;
158 private String streamId = null;
159 private int stanzasReceived = 0;
160 private int stanzasSent = 0;
161 private long lastPacketReceived = 0;
162 private long lastPingSent = 0;
163 private long lastConnect = 0;
164 private long lastSessionStarted = 0;
165 private long lastDiscoStarted = 0;
166 private boolean isMamPreferenceAlways = false;
167 private final AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
168 private final AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
169 private final AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
170 private final AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
171 private boolean mInteractive = false;
172 private int attempt = 0;
173 private OnPresencePacketReceived presenceListener = null;
174 private OnJinglePacketReceived jingleListener = null;
175 private OnIqPacketReceived unregisteredIqListener = null;
176 private OnMessagePacketReceived messageListener = null;
177 private OnStatusChanged statusListener = null;
178 private OnBindListener bindListener = null;
179 private OnMessageAcknowledged acknowledgedListener = null;
180 private SaslMechanism saslMechanism;
181 private HttpUrl redirectionUrl = null;
182 private String verifiedHostname = null;
183 private volatile Thread mThread;
184 private CountDownLatch mStreamCountDownLatch;
185
186 public XmppConnection(final Account account, final XmppConnectionService service) {
187 this.account = account;
188 this.mXmppConnectionService = service;
189 }
190
191 private static void fixResource(Context context, Account account) {
192 String resource = account.getResource();
193 int fixedPartLength =
194 context.getString(R.string.app_name).length() + 1; // include the trailing dot
195 int randomPartLength = 4; // 3 bytes
196 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
197 if (validBase64(
198 resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
199 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
200 }
201 }
202 }
203
204 private static boolean validBase64(String input) {
205 try {
206 return Base64.decode(input, Base64.URL_SAFE).length == 3;
207 } catch (Throwable throwable) {
208 return false;
209 }
210 }
211
212 private void changeStatus(final Account.State nextStatus) {
213 synchronized (this) {
214 if (Thread.currentThread().isInterrupted()) {
215 Log.d(
216 Config.LOGTAG,
217 account.getJid().asBareJid()
218 + ": not changing status to "
219 + nextStatus
220 + " because thread was interrupted");
221 return;
222 }
223 if (account.getStatus() != nextStatus) {
224 if ((nextStatus == Account.State.OFFLINE)
225 && (account.getStatus() != Account.State.CONNECTING)
226 && (account.getStatus() != Account.State.ONLINE)
227 && (account.getStatus() != Account.State.DISABLED)) {
228 return;
229 }
230 if (nextStatus == Account.State.ONLINE) {
231 this.attempt = 0;
232 }
233 account.setStatus(nextStatus);
234 } else {
235 return;
236 }
237 }
238 if (statusListener != null) {
239 statusListener.onStatusChanged(account);
240 }
241 }
242
243 public Jid getJidForCommand(final String node) {
244 synchronized (this.commands) {
245 return this.commands.get(node);
246 }
247 }
248
249 public void prepareNewConnection() {
250 this.lastConnect = SystemClock.elapsedRealtime();
251 this.lastPingSent = SystemClock.elapsedRealtime();
252 this.lastDiscoStarted = Long.MAX_VALUE;
253 this.mWaitingForSmCatchup.set(false);
254 this.changeStatus(Account.State.CONNECTING);
255 }
256
257 public boolean isWaitingForSmCatchup() {
258 return mWaitingForSmCatchup.get();
259 }
260
261 public void incrementSmCatchupMessageCounter() {
262 this.mSmCatchupMessageCounter.incrementAndGet();
263 }
264
265 protected void connect() {
266 if (mXmppConnectionService.areMessagesInitialized()) {
267 mXmppConnectionService.resetSendingToWaiting(account);
268 }
269 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
270 features.encryptionEnabled = false;
271 inSmacksSession = false;
272 isBound = false;
273 this.attempt++;
274 this.verifiedHostname =
275 null; // will be set if user entered hostname is being used or hostname was verified
276 // with dnssec
277 try {
278 Socket localSocket;
279 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
280 this.changeStatus(Account.State.CONNECTING);
281 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
282 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
283 if (useTor) {
284 String destination;
285 if (account.getHostname().isEmpty() || account.isOnion()) {
286 destination = account.getServer();
287 } else {
288 destination = account.getHostname();
289 this.verifiedHostname = destination;
290 }
291
292 final int port = account.getPort();
293 final boolean directTls = Resolver.useDirectTls(port);
294
295 Log.d(
296 Config.LOGTAG,
297 account.getJid().asBareJid()
298 + ": connect to "
299 + destination
300 + " via Tor. directTls="
301 + directTls);
302 localSocket = SocksSocketFactory.createSocketOverTor(destination, port);
303
304 if (directTls) {
305 localSocket = upgradeSocketToTls(localSocket);
306 features.encryptionEnabled = true;
307 }
308
309 try {
310 startXmpp(localSocket);
311 } catch (InterruptedException e) {
312 Log.d(
313 Config.LOGTAG,
314 account.getJid().asBareJid()
315 + ": thread was interrupted before beginning stream");
316 return;
317 } catch (Exception e) {
318 throw new IOException(e.getMessage());
319 }
320 } else {
321 final String domain = account.getServer();
322 final List<Resolver.Result> results;
323 final boolean hardcoded = extended && !account.getHostname().isEmpty();
324 if (hardcoded) {
325 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
326 } else {
327 results = Resolver.resolve(domain);
328 }
329 if (Thread.currentThread().isInterrupted()) {
330 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
331 return;
332 }
333 if (results.size() == 0) {
334 Log.e(
335 Config.LOGTAG,
336 account.getJid().asBareJid() + ": Resolver results were empty");
337 return;
338 }
339 final Resolver.Result storedBackupResult;
340 if (hardcoded) {
341 storedBackupResult = null;
342 } else {
343 storedBackupResult =
344 mXmppConnectionService.databaseBackend.findResolverResult(domain);
345 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
346 results.add(storedBackupResult);
347 Log.d(
348 Config.LOGTAG,
349 account.getJid().asBareJid()
350 + ": loaded backup resolver result from db: "
351 + storedBackupResult);
352 }
353 }
354 for (Iterator<Resolver.Result> iterator = results.iterator();
355 iterator.hasNext(); ) {
356 final Resolver.Result result = iterator.next();
357 if (Thread.currentThread().isInterrupted()) {
358 Log.d(
359 Config.LOGTAG,
360 account.getJid().asBareJid() + ": Thread was interrupted");
361 return;
362 }
363 try {
364 // if tls is true, encryption is implied and must not be started
365 features.encryptionEnabled = result.isDirectTls();
366 verifiedHostname =
367 result.isAuthenticated() ? result.getHostname().toString() : null;
368 Log.d(Config.LOGTAG, "verified hostname " + verifiedHostname);
369 final InetSocketAddress addr;
370 if (result.getIp() != null) {
371 addr = new InetSocketAddress(result.getIp(), result.getPort());
372 Log.d(
373 Config.LOGTAG,
374 account.getJid().asBareJid().toString()
375 + ": using values from resolver "
376 + (result.getHostname() == null
377 ? ""
378 : result.getHostname().toString() + "/")
379 + result.getIp().getHostAddress()
380 + ":"
381 + result.getPort()
382 + " tls: "
383 + features.encryptionEnabled);
384 } else {
385 addr =
386 new InetSocketAddress(
387 IDN.toASCII(result.getHostname().toString()),
388 result.getPort());
389 Log.d(
390 Config.LOGTAG,
391 account.getJid().asBareJid().toString()
392 + ": using values from resolver "
393 + result.getHostname().toString()
394 + ":"
395 + result.getPort()
396 + " tls: "
397 + features.encryptionEnabled);
398 }
399
400 localSocket = new Socket();
401 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
402
403 if (features.encryptionEnabled) {
404 localSocket = upgradeSocketToTls(localSocket);
405 }
406
407 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
408 if (startXmpp(localSocket)) {
409 localSocket.setSoTimeout(
410 0); // reset to 0; once the connection is established we don’t
411 // want this
412 if (!hardcoded && !result.equals(storedBackupResult)) {
413 mXmppConnectionService.databaseBackend.saveResolverResult(
414 domain, result);
415 }
416 break; // successfully connected to server that speaks xmpp
417 } else {
418 FileBackend.close(localSocket);
419 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
420 }
421 } catch (final StateChangingException e) {
422 if (!iterator.hasNext()) {
423 throw e;
424 }
425 } catch (InterruptedException e) {
426 Log.d(
427 Config.LOGTAG,
428 account.getJid().asBareJid()
429 + ": thread was interrupted before beginning stream");
430 return;
431 } catch (final Throwable e) {
432 Log.d(
433 Config.LOGTAG,
434 account.getJid().asBareJid().toString()
435 + ": "
436 + e.getMessage()
437 + "("
438 + e.getClass().getName()
439 + ")");
440 if (!iterator.hasNext()) {
441 throw new UnknownHostException();
442 }
443 }
444 }
445 }
446 processStream();
447 } catch (final SecurityException e) {
448 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
449 } catch (final StateChangingException e) {
450 this.changeStatus(e.state);
451 } catch (final UnknownHostException
452 | ConnectException
453 | SocksSocketFactory.HostNotFoundException e) {
454 this.changeStatus(Account.State.SERVER_NOT_FOUND);
455 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
456 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
457 } catch (final IOException | XmlPullParserException e) {
458 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
459 this.changeStatus(Account.State.OFFLINE);
460 this.attempt = Math.max(0, this.attempt - 1);
461 } finally {
462 if (!Thread.currentThread().isInterrupted()) {
463 forceCloseSocket();
464 } else {
465 Log.d(
466 Config.LOGTAG,
467 account.getJid().asBareJid()
468 + ": not force closing socket because thread was interrupted");
469 }
470 }
471 }
472
473 /**
474 * Starts xmpp protocol, call after connecting to socket
475 *
476 * @return true if server returns with valid xmpp, false otherwise
477 */
478 private boolean startXmpp(Socket socket) throws Exception {
479 if (Thread.currentThread().isInterrupted()) {
480 throw new InterruptedException();
481 }
482 this.socket = socket;
483 tagReader = new XmlReader();
484 if (tagWriter != null) {
485 tagWriter.forceClose();
486 }
487 tagWriter = new TagWriter();
488 tagWriter.setOutputStream(socket.getOutputStream());
489 tagReader.setInputStream(socket.getInputStream());
490 tagWriter.beginDocument();
491 sendStartStream();
492 final Tag tag = tagReader.readTag();
493 if (Thread.currentThread().isInterrupted()) {
494 throw new InterruptedException();
495 }
496 if (socket instanceof SSLSocket) {
497 SSLSocketHelper.log(account, (SSLSocket) socket);
498 }
499 return tag != null && tag.isStart("stream");
500 }
501
502 private SSLSocketFactory getSSLSocketFactory()
503 throws NoSuchAlgorithmException, KeyManagementException {
504 final SSLContext sc = SSLSocketHelper.getSSLContext();
505 final MemorizingTrustManager trustManager =
506 this.mXmppConnectionService.getMemorizingTrustManager();
507 final KeyManager[] keyManager;
508 if (account.getPrivateKeyAlias() != null) {
509 keyManager = new KeyManager[] {new MyKeyManager()};
510 } else {
511 keyManager = null;
512 }
513 final String domain = account.getServer();
514 sc.init(
515 keyManager,
516 new X509TrustManager[] {
517 mInteractive
518 ? trustManager.getInteractive(domain)
519 : trustManager.getNonInteractive(domain)
520 },
521 SECURE_RANDOM);
522 return sc.getSocketFactory();
523 }
524
525 @Override
526 public void run() {
527 synchronized (this) {
528 this.mThread = Thread.currentThread();
529 if (this.mThread.isInterrupted()) {
530 Log.d(
531 Config.LOGTAG,
532 account.getJid().asBareJid()
533 + ": aborting connect because thread was interrupted");
534 return;
535 }
536 forceCloseSocket();
537 }
538 connect();
539 }
540
541 private void processStream() throws XmlPullParserException, IOException {
542 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
543 this.mStreamCountDownLatch = streamCountDownLatch;
544 Tag nextTag = tagReader.readTag();
545 while (nextTag != null && !nextTag.isEnd("stream")) {
546 if (nextTag.isStart("error")) {
547 processStreamError(nextTag);
548 } else if (nextTag.isStart("features")) {
549 processStreamFeatures(nextTag);
550 } else if (nextTag.isStart("proceed", Namespace.TLS)) {
551 switchOverToTls();
552 } else if (nextTag.isStart("success")) {
553 final Element success = tagReader.readElement(nextTag);
554 if (processSuccess(success)) {
555 break;
556 }
557
558 } else if (nextTag.isStart("failure", Namespace.TLS)) {
559 throw new StateChangingException(Account.State.TLS_ERROR);
560 } else if (nextTag.isStart("failure")) {
561 final Element failure = tagReader.readElement(nextTag);
562 processFailure(failure);
563 } else if (nextTag.isStart("continue", Namespace.SASL_2)) {
564 // two step sasl2 - we don’t support this yet
565 throw new StateChangingException(Account.State.INCOMPATIBLE_CLIENT);
566 } else if (nextTag.isStart("challenge")) {
567 final Element challenge = tagReader.readElement(nextTag);
568 processChallenge(challenge);
569 } else if (nextTag.isStart("enabled", Namespace.STREAM_MANAGEMENT)) {
570 final Element enabled = tagReader.readElement(nextTag);
571 processEnabled(enabled);
572 } else if (nextTag.isStart("resumed")) {
573 final Element resumed = tagReader.readElement(nextTag);
574 processResumed(resumed);
575 } else if (nextTag.isStart("r")) {
576 tagReader.readElement(nextTag);
577 if (Config.EXTENDED_SM_LOGGING) {
578 Log.d(
579 Config.LOGTAG,
580 account.getJid().asBareJid()
581 + ": acknowledging stanza #"
582 + this.stanzasReceived);
583 }
584 final AckPacket ack = new AckPacket(this.stanzasReceived);
585 tagWriter.writeStanzaAsync(ack);
586 } else if (nextTag.isStart("a")) {
587 boolean accountUiNeedsRefresh = false;
588 synchronized (NotificationService.CATCHUP_LOCK) {
589 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
590 final int messageCount = mSmCatchupMessageCounter.get();
591 final int pendingIQs = packetCallbacks.size();
592 Log.d(
593 Config.LOGTAG,
594 account.getJid().asBareJid()
595 + ": SM catchup complete (messages="
596 + messageCount
597 + ", pending IQs="
598 + pendingIQs
599 + ")");
600 accountUiNeedsRefresh = true;
601 if (messageCount > 0) {
602 mXmppConnectionService
603 .getNotificationService()
604 .finishBacklog(true, account);
605 }
606 }
607 }
608 if (accountUiNeedsRefresh) {
609 mXmppConnectionService.updateAccountUi();
610 }
611 final Element ack = tagReader.readElement(nextTag);
612 lastPacketReceived = SystemClock.elapsedRealtime();
613 try {
614 final boolean acknowledgedMessages;
615 synchronized (this.mStanzaQueue) {
616 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
617 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
618 }
619 if (acknowledgedMessages) {
620 mXmppConnectionService.updateConversationUi();
621 }
622 } catch (NumberFormatException | NullPointerException e) {
623 Log.d(
624 Config.LOGTAG,
625 account.getJid().asBareJid()
626 + ": server send ack without sequence number");
627 }
628 } else if (nextTag.isStart("failed")) {
629 final Element failed = tagReader.readElement(nextTag);
630 processFailed(failed, true);
631 } else if (nextTag.isStart("iq")) {
632 processIq(nextTag);
633 } else if (nextTag.isStart("message")) {
634 processMessage(nextTag);
635 } else if (nextTag.isStart("presence")) {
636 processPresence(nextTag);
637 }
638 nextTag = tagReader.readTag();
639 }
640 if (nextTag != null && nextTag.isEnd("stream")) {
641 streamCountDownLatch.countDown();
642 }
643 }
644
645 private void processChallenge(Element challenge) throws IOException {
646 final SaslMechanism.Version version;
647 try {
648 version = SaslMechanism.Version.of(challenge);
649 } catch (final IllegalArgumentException e) {
650 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
651 }
652 final Element response;
653 if (version == SaslMechanism.Version.SASL) {
654 response = new Element("response", Namespace.SASL);
655 } else if (version == SaslMechanism.Version.SASL_2) {
656 response = new Element("response", Namespace.SASL_2);
657 } else {
658 throw new AssertionError("Missing implementation for " + version);
659 }
660 try {
661 response.setContent(saslMechanism.getResponse(challenge.getContent(), sslSocketOrNull(socket)));
662 } catch (final SaslMechanism.AuthenticationException e) {
663 // TODO: Send auth abort tag.
664 Log.e(Config.LOGTAG, e.toString());
665 throw new StateChangingException(Account.State.UNAUTHORIZED);
666 }
667 tagWriter.writeElement(response);
668 }
669
670 private boolean processSuccess(final Element success)
671 throws IOException, XmlPullParserException {
672 final SaslMechanism.Version version;
673 try {
674 version = SaslMechanism.Version.of(success);
675 } catch (final IllegalArgumentException e) {
676 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
677 }
678 final String challenge;
679 if (version == SaslMechanism.Version.SASL) {
680 challenge = success.getContent();
681 } else if (version == SaslMechanism.Version.SASL_2) {
682 challenge = success.findChildContent("additional-data");
683 } else {
684 throw new AssertionError("Missing implementation for " + version);
685 }
686 try {
687 saslMechanism.getResponse(challenge, sslSocketOrNull(socket));
688 } catch (final SaslMechanism.AuthenticationException e) {
689 Log.e(Config.LOGTAG, String.valueOf(e));
690 throw new StateChangingException(Account.State.UNAUTHORIZED);
691 }
692 Log.d(
693 Config.LOGTAG,
694 account.getJid().asBareJid().toString() + ": logged in (using " + version + ")");
695 // TODO store mechanism name
696 account.setKey(Account.PINNED_MECHANISM_KEY, String.valueOf(saslMechanism.getPriority()));
697 if (version == SaslMechanism.Version.SASL_2) {
698 final String authorizationIdentifier =
699 success.findChildContent("authorization-identifier");
700 final Jid authorizationJid;
701 try {
702 authorizationJid =
703 Strings.isNullOrEmpty(authorizationIdentifier)
704 ? null
705 : Jid.ofEscaped(authorizationIdentifier);
706 } catch (final IllegalArgumentException e) {
707 Log.d(
708 Config.LOGTAG,
709 account.getJid().asBareJid()
710 + ": SASL 2.0 authorization identifier was not a valid jid");
711 throw new StateChangingException(Account.State.BIND_FAILURE);
712 }
713 if (authorizationJid == null) {
714 throw new StateChangingException(Account.State.BIND_FAILURE);
715 }
716 Log.d(
717 Config.LOGTAG,
718 account.getJid().asBareJid()
719 + ": SASL 2.0 authorization identifier was "
720 + authorizationJid);
721 if (!account.getJid().getDomain().equals(authorizationJid.getDomain())) {
722 Log.d(
723 Config.LOGTAG,
724 account.getJid().asBareJid()
725 + ": server tried to re-assign domain to "
726 + authorizationJid.getDomain());
727 throw new StateChangingError(Account.State.BIND_FAILURE);
728 }
729 if (authorizationJid.isFullJid() && account.setJid(authorizationJid)) {
730 Log.d(
731 Config.LOGTAG,
732 account.getJid().asBareJid()
733 + ": jid changed during SASL 2.0. updating database");
734 mXmppConnectionService.databaseBackend.updateAccount(account);
735 }
736 final Element bound = success.findChild("bound", Namespace.BIND2);
737 final Element resumed = success.findChild("resumed", "urn:xmpp:sm:3");
738 final Element failed = success.findChild("failed", "urn:xmpp:sm:3");
739 // TODO check if resumed and bound exist and throw bind failure
740 if (resumed != null && streamId != null) {
741 processResumed(resumed);
742 } else if (failed != null) {
743 processFailed(failed, false); // wait for new stream features
744 }
745 if (bound != null) {
746 this.isBound = true;
747 final Element streamManagementEnabled =
748 bound.findChild("enabled", Namespace.STREAM_MANAGEMENT);
749 final Element carbonsEnabled = bound.findChild("enabled", Namespace.CARBONS);
750 if (streamManagementEnabled != null) {
751 processEnabled(streamManagementEnabled);
752 }
753 if (carbonsEnabled != null) {
754 Log.d(
755 Config.LOGTAG,
756 account.getJid().asBareJid() + ": successfully enabled carbons");
757 features.carbonsEnabled = true;
758 }
759 // TODO if both are set mark account ready for pipelining
760 sendPostBindInitialization(streamManagementEnabled != null, carbonsEnabled != null);
761 }
762 }
763 if (version == SaslMechanism.Version.SASL) {
764 tagReader.reset();
765 sendStartStream();
766 final Tag tag = tagReader.readTag();
767 if (tag != null && tag.isStart("stream")) {
768 processStream();
769 return true;
770 } else {
771 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
772 }
773 } else {
774 return false;
775 }
776 }
777
778 private void processFailure(final Element failure) throws StateChangingException {
779 final SaslMechanism.Version version;
780 try {
781 version = SaslMechanism.Version.of(failure);
782 } catch (final IllegalArgumentException e) {
783 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
784 }
785 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
786 if (failure.hasChild("temporary-auth-failure")) {
787 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
788 } else if (failure.hasChild("account-disabled")) {
789 final String text = failure.findChildContent("text");
790 if (Strings.isNullOrEmpty(text)) {
791 throw new StateChangingException(Account.State.UNAUTHORIZED);
792 }
793 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
794 if (matcher.find()) {
795 final HttpUrl url;
796 try {
797 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
798 } catch (final IllegalArgumentException e) {
799 throw new StateChangingException(Account.State.UNAUTHORIZED);
800 }
801 if (url.isHttps()) {
802 this.redirectionUrl = url;
803 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
804 }
805 }
806 }
807 throw new StateChangingException(Account.State.UNAUTHORIZED);
808 }
809
810 private static SSLSocket sslSocketOrNull(final Socket socket) {
811 if (socket instanceof SSLSocket) {
812 return (SSLSocket) socket;
813 } else {
814 return null;
815 }
816 }
817
818 private void processEnabled(final Element enabled) {
819 final String streamId;
820 if (enabled.getAttributeAsBoolean("resume")) {
821 streamId = enabled.getAttribute("id");
822 Log.d(
823 Config.LOGTAG,
824 account.getJid().asBareJid().toString()
825 + ": stream management enabled (resumable)");
826 } else {
827 Log.d(
828 Config.LOGTAG,
829 account.getJid().asBareJid().toString() + ": stream management enabled");
830 streamId = null;
831 }
832 this.streamId = streamId;
833 this.stanzasReceived = 0;
834 this.inSmacksSession = true;
835 final RequestPacket r = new RequestPacket();
836 tagWriter.writeStanzaAsync(r);
837 }
838
839 private void processResumed(final Element resumed) throws StateChangingException {
840 this.inSmacksSession = true;
841 this.isBound = true;
842 this.tagWriter.writeStanzaAsync(new RequestPacket());
843 lastPacketReceived = SystemClock.elapsedRealtime();
844 final String h = resumed.getAttribute("h");
845 if (h == null) {
846 resetStreamId();
847 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
848 }
849 final int serverCount;
850 try {
851 serverCount = Integer.parseInt(h);
852 } catch (final NumberFormatException e) {
853 resetStreamId();
854 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
855 }
856 final ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
857 final boolean acknowledgedMessages;
858 synchronized (this.mStanzaQueue) {
859 if (serverCount < stanzasSent) {
860 Log.d(
861 Config.LOGTAG,
862 account.getJid().asBareJid() + ": session resumed with lost packages");
863 stanzasSent = serverCount;
864 } else {
865 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": session resumed");
866 }
867 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
868 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
869 failedStanzas.add(mStanzaQueue.valueAt(i));
870 }
871 mStanzaQueue.clear();
872 }
873 if (acknowledgedMessages) {
874 mXmppConnectionService.updateConversationUi();
875 }
876 Log.d(
877 Config.LOGTAG,
878 account.getJid().asBareJid() + ": resending " + failedStanzas.size() + " stanzas");
879 for (final AbstractAcknowledgeableStanza packet : failedStanzas) {
880 if (packet instanceof MessagePacket) {
881 MessagePacket message = (MessagePacket) packet;
882 mXmppConnectionService.markMessage(
883 account,
884 message.getTo().asBareJid(),
885 message.getId(),
886 Message.STATUS_UNSEND);
887 }
888 sendPacket(packet);
889 }
890 Log.d(
891 Config.LOGTAG,
892 account.getJid().asBareJid() + ": online with resource " + account.getResource());
893 changeStatus(Account.State.ONLINE);
894 }
895
896 private void processFailed(final Element failed, final boolean sendBindRequest) {
897 final int serverCount;
898 try {
899 serverCount = Integer.parseInt(failed.getAttribute("h"));
900 } catch (final NumberFormatException | NullPointerException e) {
901 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
902 resetStreamId();
903 if (sendBindRequest) {
904 sendBindRequest();
905 }
906 return;
907 }
908 Log.d(
909 Config.LOGTAG,
910 account.getJid().asBareJid()
911 + ": resumption failed but server acknowledged stanza #"
912 + serverCount);
913 final boolean acknowledgedMessages;
914 synchronized (this.mStanzaQueue) {
915 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
916 }
917 if (acknowledgedMessages) {
918 mXmppConnectionService.updateConversationUi();
919 }
920 resetStreamId();
921 if (sendBindRequest) {
922 sendBindRequest();
923 }
924 }
925
926 private boolean acknowledgeStanzaUpTo(int serverCount) {
927 if (serverCount > stanzasSent) {
928 Log.e(
929 Config.LOGTAG,
930 "server acknowledged more stanzas than we sent. serverCount="
931 + serverCount
932 + ", ourCount="
933 + stanzasSent);
934 }
935 boolean acknowledgedMessages = false;
936 for (int i = 0; i < mStanzaQueue.size(); ++i) {
937 if (serverCount >= mStanzaQueue.keyAt(i)) {
938 if (Config.EXTENDED_SM_LOGGING) {
939 Log.d(
940 Config.LOGTAG,
941 account.getJid().asBareJid()
942 + ": server acknowledged stanza #"
943 + mStanzaQueue.keyAt(i));
944 }
945 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
946 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
947 final MessagePacket packet = (MessagePacket) stanza;
948 final String id = packet.getId();
949 final Jid to = packet.getTo();
950 if (id != null && to != null) {
951 acknowledgedMessages |=
952 acknowledgedListener.onMessageAcknowledged(account, to, id);
953 }
954 }
955 mStanzaQueue.removeAt(i);
956 i--;
957 }
958 }
959 return acknowledgedMessages;
960 }
961
962 private @NonNull Element processPacket(final Tag currentTag, final int packetType)
963 throws IOException {
964 final Element element;
965 switch (packetType) {
966 case PACKET_IQ:
967 element = new IqPacket();
968 break;
969 case PACKET_MESSAGE:
970 element = new MessagePacket();
971 break;
972 case PACKET_PRESENCE:
973 element = new PresencePacket();
974 break;
975 default:
976 throw new AssertionError("Should never encounter invalid type");
977 }
978 element.setAttributes(currentTag.getAttributes());
979 Tag nextTag = tagReader.readTag();
980 if (nextTag == null) {
981 throw new IOException("interrupted mid tag");
982 }
983 while (!nextTag.isEnd(element.getName())) {
984 if (!nextTag.isNo()) {
985 element.addChild(tagReader.readElement(nextTag));
986 }
987 nextTag = tagReader.readTag();
988 if (nextTag == null) {
989 throw new IOException("interrupted mid tag");
990 }
991 }
992 if (stanzasReceived == Integer.MAX_VALUE) {
993 resetStreamId();
994 throw new IOException("time to restart the session. cant handle >2 billion pcks");
995 }
996 if (inSmacksSession) {
997 ++stanzasReceived;
998 } else if (features.sm()) {
999 Log.d(
1000 Config.LOGTAG,
1001 account.getJid().asBareJid()
1002 + ": not counting stanza("
1003 + element.getClass().getSimpleName()
1004 + "). Not in smacks session.");
1005 }
1006 lastPacketReceived = SystemClock.elapsedRealtime();
1007 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
1008 Log.d(Config.LOGTAG, "[background stanza] " + element);
1009 }
1010 if (element instanceof IqPacket
1011 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
1012 && element.hasChild("jingle", Namespace.JINGLE)) {
1013 return JinglePacket.upgrade((IqPacket) element);
1014 } else {
1015 return element;
1016 }
1017 }
1018
1019 private void processIq(final Tag currentTag) throws IOException {
1020 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
1021 if (!packet.valid()) {
1022 Log.e(
1023 Config.LOGTAG,
1024 "encountered invalid iq from='"
1025 + packet.getFrom()
1026 + "' to='"
1027 + packet.getTo()
1028 + "'");
1029 return;
1030 }
1031 if (packet instanceof JinglePacket) {
1032 if (this.jingleListener != null) {
1033 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
1034 }
1035 } else {
1036 OnIqPacketReceived callback = null;
1037 synchronized (this.packetCallbacks) {
1038 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple =
1039 packetCallbacks.get(packet.getId());
1040 if (packetCallbackDuple != null) {
1041 // Packets to the server should have responses from the server
1042 if (packetCallbackDuple.first.toServer(account)) {
1043 if (packet.fromServer(account)) {
1044 callback = packetCallbackDuple.second;
1045 packetCallbacks.remove(packet.getId());
1046 } else {
1047 Log.e(
1048 Config.LOGTAG,
1049 account.getJid().asBareJid().toString()
1050 + ": ignoring spoofed iq packet");
1051 }
1052 } else {
1053 if (packet.getFrom() != null
1054 && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
1055 callback = packetCallbackDuple.second;
1056 packetCallbacks.remove(packet.getId());
1057 } else {
1058 Log.e(
1059 Config.LOGTAG,
1060 account.getJid().asBareJid().toString()
1061 + ": ignoring spoofed iq packet");
1062 }
1063 }
1064 } else if (packet.getType() == IqPacket.TYPE.GET
1065 || packet.getType() == IqPacket.TYPE.SET) {
1066 callback = this.unregisteredIqListener;
1067 }
1068 }
1069 if (callback != null) {
1070 try {
1071 callback.onIqPacketReceived(account, packet);
1072 } catch (StateChangingError error) {
1073 throw new StateChangingException(error.state);
1074 }
1075 }
1076 }
1077 }
1078
1079 private void processMessage(final Tag currentTag) throws IOException {
1080 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
1081 if (!packet.valid()) {
1082 Log.e(
1083 Config.LOGTAG,
1084 "encountered invalid message from='"
1085 + packet.getFrom()
1086 + "' to='"
1087 + packet.getTo()
1088 + "'");
1089 return;
1090 }
1091 this.messageListener.onMessagePacketReceived(account, packet);
1092 }
1093
1094 private void processPresence(final Tag currentTag) throws IOException {
1095 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
1096 if (!packet.valid()) {
1097 Log.e(
1098 Config.LOGTAG,
1099 "encountered invalid presence from='"
1100 + packet.getFrom()
1101 + "' to='"
1102 + packet.getTo()
1103 + "'");
1104 return;
1105 }
1106 this.presenceListener.onPresencePacketReceived(account, packet);
1107 }
1108
1109 private void sendStartTLS() throws IOException {
1110 final Tag startTLS = Tag.empty("starttls");
1111 startTLS.setAttribute("xmlns", Namespace.TLS);
1112 tagWriter.writeTag(startTLS);
1113 }
1114
1115 private void switchOverToTls() throws XmlPullParserException, IOException {
1116 tagReader.readTag();
1117 final Socket socket = this.socket;
1118 final SSLSocket sslSocket = upgradeSocketToTls(socket);
1119 tagReader.setInputStream(sslSocket.getInputStream());
1120 tagWriter.setOutputStream(sslSocket.getOutputStream());
1121 sendStartStream();
1122 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
1123 features.encryptionEnabled = true;
1124 final Tag tag = tagReader.readTag();
1125 if (tag != null && tag.isStart("stream")) {
1126 SSLSocketHelper.log(account, sslSocket);
1127 processStream();
1128 } else {
1129 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
1130 }
1131 sslSocket.close();
1132 }
1133
1134 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
1135 final SSLSocketFactory sslSocketFactory;
1136 try {
1137 sslSocketFactory = getSSLSocketFactory();
1138 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
1139 throw new StateChangingException(Account.State.TLS_ERROR);
1140 }
1141 final InetAddress address = socket.getInetAddress();
1142 final SSLSocket sslSocket =
1143 (SSLSocket)
1144 sslSocketFactory.createSocket(
1145 socket, address.getHostAddress(), socket.getPort(), true);
1146 SSLSocketHelper.setSecurity(sslSocket);
1147 SSLSocketHelper.setHostname(sslSocket, IDN.toASCII(account.getServer()));
1148 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
1149 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
1150 try {
1151 if (!xmppDomainVerifier.verify(
1152 account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
1153 Log.d(
1154 Config.LOGTAG,
1155 account.getJid().asBareJid()
1156 + ": TLS certificate domain verification failed");
1157 FileBackend.close(sslSocket);
1158 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
1159 }
1160 } catch (final SSLPeerUnverifiedException e) {
1161 FileBackend.close(sslSocket);
1162 throw new StateChangingException(Account.State.TLS_ERROR);
1163 }
1164 return sslSocket;
1165 }
1166
1167 private void processStreamFeatures(final Tag currentTag) throws IOException {
1168 this.streamFeatures = tagReader.readElement(currentTag);
1169 final boolean isSecure =
1170 features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
1171 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
1172 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
1173 && !features.encryptionEnabled) {
1174 sendStartTLS();
1175 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1176 && account.isOptionSet(Account.OPTION_REGISTER)) {
1177 if (isSecure) {
1178 register();
1179 } else {
1180 Log.d(
1181 Config.LOGTAG,
1182 account.getJid().asBareJid()
1183 + ": unable to find STARTTLS for registration process "
1184 + XmlHelper.printElementNames(this.streamFeatures));
1185 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1186 }
1187 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1188 && account.isOptionSet(Account.OPTION_REGISTER)) {
1189 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
1190 } else if (Config.SASL_2_ENABLED
1191 && this.streamFeatures.hasChild("mechanisms", Namespace.SASL_2)
1192 && shouldAuthenticate
1193 && isSecure) {
1194 authenticate(SaslMechanism.Version.SASL_2);
1195 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
1196 && shouldAuthenticate
1197 && isSecure) {
1198 authenticate(SaslMechanism.Version.SASL);
1199 } else if (this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT)
1200 && streamId != null
1201 && !inSmacksSession) {
1202 if (Config.EXTENDED_SM_LOGGING) {
1203 Log.d(
1204 Config.LOGTAG,
1205 account.getJid().asBareJid()
1206 + ": resuming after stanza #"
1207 + stanzasReceived);
1208 }
1209 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived);
1210 this.mSmCatchupMessageCounter.set(0);
1211 this.mWaitingForSmCatchup.set(true);
1212 this.tagWriter.writeStanzaAsync(resume);
1213 } else if (needsBinding) {
1214 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
1215 sendBindRequest();
1216 } else {
1217 Log.d(
1218 Config.LOGTAG,
1219 account.getJid().asBareJid()
1220 + ": unable to find bind feature "
1221 + XmlHelper.printElementNames(this.streamFeatures));
1222 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1223 }
1224 } else {
1225 Log.d(
1226 Config.LOGTAG,
1227 account.getJid().asBareJid()
1228 + ": received NOP stream features "
1229 + XmlHelper.printElementNames(this.streamFeatures));
1230 }
1231 }
1232
1233 private void authenticate(final SaslMechanism.Version version) throws IOException {
1234 final Element element =
1235 this.streamFeatures.findChild("mechanisms", SaslMechanism.namespace(version));
1236 final Collection<String> mechanisms =
1237 Collections2.transform(
1238 Collections2.filter(
1239 element.getChildren(),
1240 c -> c != null && "mechanism".equals(c.getName())),
1241 c -> c == null ? null : c.getContent());
1242 final Element cbElement =
1243 this.streamFeatures.findChild("sasl-channel-binding", Namespace.CHANNEL_BINDING);
1244 final Collection<ChannelBinding> channelBindings =
1245 Collections2.filter(
1246 Collections2.transform(
1247 Collections2.filter(
1248 cbElement == null
1249 ? Collections.emptyList()
1250 : cbElement.getChildren(),
1251 c -> c != null && "channel-binding".equals(c.getName())),
1252 c -> c == null ? null : ChannelBinding.of(c.getAttribute("type"))),
1253 Predicates.notNull());
1254 Log.d(Config.LOGTAG,"mechanisms: "+mechanisms);
1255 Log.d(Config.LOGTAG, "channel bindings: " + channelBindings);
1256 final SaslMechanism.Factory factory = new SaslMechanism.Factory(account);
1257 this.saslMechanism = factory.of(mechanisms, channelBindings);
1258
1259 if (saslMechanism == null) {
1260 Log.d(
1261 Config.LOGTAG,
1262 account.getJid().asBareJid()
1263 + ": unable to find supported SASL mechanism in "
1264 + mechanisms);
1265 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1266 }
1267 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
1268 if (pinnedMechanism > saslMechanism.getPriority()) {
1269 Log.e(
1270 Config.LOGTAG,
1271 "Auth failed. Authentication mechanism "
1272 + saslMechanism.getMechanism()
1273 + " has lower priority ("
1274 + saslMechanism.getPriority()
1275 + ") than pinned priority ("
1276 + pinnedMechanism
1277 + "). Possible downgrade attack?");
1278 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1279 }
1280 final String firstMessage = saslMechanism.getClientFirstMessage();
1281 final Element authenticate;
1282 if (version == SaslMechanism.Version.SASL) {
1283 authenticate = new Element("auth", Namespace.SASL);
1284 if (!Strings.isNullOrEmpty(firstMessage)) {
1285 authenticate.setContent(firstMessage);
1286 }
1287 } else if (version == SaslMechanism.Version.SASL_2) {
1288 authenticate = new Element("authenticate", Namespace.SASL_2);
1289 if (!Strings.isNullOrEmpty(firstMessage)) {
1290 authenticate.addChild("initial-response").setContent(firstMessage);
1291 }
1292 final Element inline = this.streamFeatures.findChild("inline", Namespace.SASL_2);
1293 final boolean inlineStreamManagement =
1294 inline != null && inline.hasChild("sm", "urn:xmpp:sm:3");
1295 final boolean inlineBind2 = inline != null && inline.hasChild("bind", Namespace.BIND2);
1296 final Element inlineBindFeatures =
1297 this.streamFeatures.findChild("inline", Namespace.BIND2);
1298 if (inlineBind2 && inlineBindFeatures != null) {
1299 final Element bind =
1300 generateBindRequest(
1301 Collections2.transform(
1302 inlineBindFeatures.getChildren(),
1303 c -> c == null ? null : c.getAttribute("var")));
1304 authenticate.addChild(bind);
1305 }
1306 if (inlineStreamManagement && streamId != null) {
1307 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived);
1308 this.mSmCatchupMessageCounter.set(0);
1309 this.mWaitingForSmCatchup.set(true);
1310 authenticate.addChild(resume);
1311 }
1312 } else {
1313 throw new AssertionError("Missing implementation for " + version);
1314 }
1315
1316 Log.d(
1317 Config.LOGTAG,
1318 account.getJid().toString()
1319 + ": Authenticating with "
1320 + version
1321 + "/"
1322 + saslMechanism.getMechanism());
1323 authenticate.setAttribute("mechanism", saslMechanism.getMechanism());
1324 tagWriter.writeElement(authenticate);
1325 }
1326
1327 private Element generateBindRequest(final Collection<String> bindFeatures) {
1328 Log.d(Config.LOGTAG, "inline bind features: " + bindFeatures);
1329 final Element bind = new Element("bind", Namespace.BIND2);
1330 final Element clientId = bind.addChild("client-id");
1331 clientId.setAttribute("tag", mXmppConnectionService.getString(R.string.app_name));
1332 clientId.setContent(account.getUuid());
1333 final Element features = bind.addChild("features");
1334 if (bindFeatures.contains(Namespace.CARBONS)) {
1335 features.addChild("enable", Namespace.CARBONS);
1336 }
1337 if (bindFeatures.contains(Namespace.STREAM_MANAGEMENT)) {
1338 features.addChild(new EnablePacket());
1339 }
1340 return bind;
1341 }
1342
1343 private static Collection<String> extractMechanisms(final Element stream) {
1344 return Collections2.transform(stream.getChildren(), c -> c == null ? null : c.getContent());
1345 }
1346
1347 private void register() {
1348 final String preAuth = account.getKey(Account.PRE_AUTH_REGISTRATION_TOKEN);
1349 if (preAuth != null && features.invite()) {
1350 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1351 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1352 sendUnmodifiedIqPacket(
1353 preAuthRequest,
1354 (account, response) -> {
1355 if (response.getType() == IqPacket.TYPE.RESULT) {
1356 sendRegistryRequest();
1357 } else {
1358 final String error = response.getErrorCondition();
1359 Log.d(
1360 Config.LOGTAG,
1361 account.getJid().asBareJid()
1362 + ": failed to pre auth. "
1363 + error);
1364 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1365 }
1366 },
1367 true);
1368 } else {
1369 sendRegistryRequest();
1370 }
1371 }
1372
1373 private void sendRegistryRequest() {
1374 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1375 register.query(Namespace.REGISTER);
1376 register.setTo(account.getDomain());
1377 sendUnmodifiedIqPacket(
1378 register,
1379 (account, packet) -> {
1380 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1381 return;
1382 }
1383 if (packet.getType() == IqPacket.TYPE.ERROR) {
1384 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1385 }
1386 final Element query = packet.query(Namespace.REGISTER);
1387 if (query.hasChild("username") && (query.hasChild("password"))) {
1388 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1389 final Element username =
1390 new Element("username").setContent(account.getUsername());
1391 final Element password =
1392 new Element("password").setContent(account.getPassword());
1393 register1.query(Namespace.REGISTER).addChild(username);
1394 register1.query().addChild(password);
1395 register1.setFrom(account.getJid().asBareJid());
1396 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1397 } else if (query.hasChild("x", Namespace.DATA)) {
1398 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1399 final Element blob = query.findChild("data", "urn:xmpp:bob");
1400 final String id = packet.getId();
1401 InputStream is;
1402 if (blob != null) {
1403 try {
1404 final String base64Blob = blob.getContent();
1405 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1406 is = new ByteArrayInputStream(strBlob);
1407 } catch (Exception e) {
1408 is = null;
1409 }
1410 } else {
1411 final boolean useTor =
1412 mXmppConnectionService.useTorToConnect() || account.isOnion();
1413 try {
1414 final String url = data.getValue("url");
1415 final String fallbackUrl = data.getValue("captcha-fallback-url");
1416 if (url != null) {
1417 is = HttpConnectionManager.open(url, useTor);
1418 } else if (fallbackUrl != null) {
1419 is = HttpConnectionManager.open(fallbackUrl, useTor);
1420 } else {
1421 is = null;
1422 }
1423 } catch (final IOException e) {
1424 Log.d(
1425 Config.LOGTAG,
1426 account.getJid().asBareJid() + ": unable to fetch captcha",
1427 e);
1428 is = null;
1429 }
1430 }
1431
1432 if (is != null) {
1433 Bitmap captcha = BitmapFactory.decodeStream(is);
1434 try {
1435 if (mXmppConnectionService.displayCaptchaRequest(
1436 account, id, data, captcha)) {
1437 return;
1438 }
1439 } catch (Exception e) {
1440 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1441 }
1442 }
1443 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1444 } else if (query.hasChild("instructions")
1445 || query.hasChild("x", Namespace.OOB)) {
1446 final String instructions = query.findChildContent("instructions");
1447 final Element oob = query.findChild("x", Namespace.OOB);
1448 final String url = oob == null ? null : oob.findChildContent("url");
1449 if (url != null) {
1450 setAccountCreationFailed(url);
1451 } else if (instructions != null) {
1452 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1453 if (matcher.find()) {
1454 setAccountCreationFailed(
1455 instructions.substring(matcher.start(), matcher.end()));
1456 }
1457 }
1458 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1459 }
1460 },
1461 true);
1462 }
1463
1464 private void setAccountCreationFailed(final String url) {
1465 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1466 if (httpUrl != null && httpUrl.isHttps()) {
1467 this.redirectionUrl = httpUrl;
1468 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1469 }
1470 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1471 }
1472
1473 public HttpUrl getRedirectionUrl() {
1474 return this.redirectionUrl;
1475 }
1476
1477 public void resetEverything() {
1478 resetAttemptCount(true);
1479 resetStreamId();
1480 clearIqCallbacks();
1481 this.stanzasSent = 0;
1482 mStanzaQueue.clear();
1483 this.redirectionUrl = null;
1484 synchronized (this.disco) {
1485 disco.clear();
1486 }
1487 synchronized (this.commands) {
1488 this.commands.clear();
1489 }
1490 }
1491
1492 private void sendBindRequest() {
1493 try {
1494 mXmppConnectionService.restoredFromDatabaseLatch.await();
1495 } catch (InterruptedException e) {
1496 Log.d(
1497 Config.LOGTAG,
1498 account.getJid().asBareJid()
1499 + ": interrupted while waiting for DB restore during bind");
1500 return;
1501 }
1502 clearIqCallbacks();
1503 if (account.getJid().isBareJid()) {
1504 account.setResource(this.createNewResource());
1505 } else {
1506 fixResource(mXmppConnectionService, account);
1507 }
1508 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1509 final String resource =
1510 Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1511 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1512 this.sendUnmodifiedIqPacket(
1513 iq,
1514 (account, packet) -> {
1515 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1516 return;
1517 }
1518 final Element bind = packet.findChild("bind");
1519 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1520 isBound = true;
1521 final Element jid = bind.findChild("jid");
1522 if (jid != null && jid.getContent() != null) {
1523 try {
1524 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1525 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1526 Log.d(
1527 Config.LOGTAG,
1528 account.getJid().asBareJid()
1529 + ": server tried to re-assign domain to "
1530 + assignedJid.getDomain());
1531 throw new StateChangingError(Account.State.BIND_FAILURE);
1532 }
1533 if (account.setJid(assignedJid)) {
1534 Log.d(
1535 Config.LOGTAG,
1536 account.getJid().asBareJid()
1537 + ": jid changed during bind. updating database");
1538 mXmppConnectionService.databaseBackend.updateAccount(account);
1539 }
1540 if (streamFeatures.hasChild("session")
1541 && !streamFeatures
1542 .findChild("session")
1543 .hasChild("optional")) {
1544 sendStartSession();
1545 } else {
1546 final boolean waitForDisco = enableStreamManagement();
1547 sendPostBindInitialization(waitForDisco, false);
1548 }
1549 return;
1550 } catch (final IllegalArgumentException e) {
1551 Log.d(
1552 Config.LOGTAG,
1553 account.getJid().asBareJid()
1554 + ": server reported invalid jid ("
1555 + jid.getContent()
1556 + ") on bind");
1557 }
1558 } else {
1559 Log.d(
1560 Config.LOGTAG,
1561 account.getJid()
1562 + ": disconnecting because of bind failure. (no jid)");
1563 }
1564 } else {
1565 Log.d(
1566 Config.LOGTAG,
1567 account.getJid()
1568 + ": disconnecting because of bind failure ("
1569 + packet);
1570 }
1571 final Element error = packet.findChild("error");
1572 if (packet.getType() == IqPacket.TYPE.ERROR
1573 && error != null
1574 && error.hasChild("conflict")) {
1575 account.setResource(createNewResource());
1576 }
1577 throw new StateChangingError(Account.State.BIND_FAILURE);
1578 },
1579 true);
1580 }
1581
1582 private void clearIqCallbacks() {
1583 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1584 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1585 synchronized (this.packetCallbacks) {
1586 if (this.packetCallbacks.size() == 0) {
1587 return;
1588 }
1589 Log.d(
1590 Config.LOGTAG,
1591 account.getJid().asBareJid()
1592 + ": clearing "
1593 + this.packetCallbacks.size()
1594 + " iq callbacks");
1595 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator =
1596 this.packetCallbacks.values().iterator();
1597 while (iterator.hasNext()) {
1598 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1599 callbacks.add(entry.second);
1600 iterator.remove();
1601 }
1602 }
1603 for (OnIqPacketReceived callback : callbacks) {
1604 try {
1605 callback.onIqPacketReceived(account, failurePacket);
1606 } catch (StateChangingError error) {
1607 Log.d(
1608 Config.LOGTAG,
1609 account.getJid().asBareJid()
1610 + ": caught StateChangingError("
1611 + error.state.toString()
1612 + ") while clearing callbacks");
1613 // ignore
1614 }
1615 }
1616 Log.d(
1617 Config.LOGTAG,
1618 account.getJid().asBareJid()
1619 + ": done clearing iq callbacks. "
1620 + this.packetCallbacks.size()
1621 + " left");
1622 }
1623
1624 public void sendDiscoTimeout() {
1625 if (mWaitForDisco.compareAndSet(true, false)) {
1626 Log.d(
1627 Config.LOGTAG,
1628 account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1629 finalizeBind();
1630 }
1631 }
1632
1633 private void sendStartSession() {
1634 Log.d(
1635 Config.LOGTAG,
1636 account.getJid().asBareJid() + ": sending legacy session to outdated server");
1637 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1638 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1639 this.sendUnmodifiedIqPacket(
1640 startSession,
1641 (account, packet) -> {
1642 if (packet.getType() == IqPacket.TYPE.RESULT) {
1643 final boolean waitForDisco = enableStreamManagement();
1644 sendPostBindInitialization(waitForDisco, false);
1645 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1646 throw new StateChangingError(Account.State.SESSION_FAILURE);
1647 }
1648 },
1649 true);
1650 }
1651
1652 private boolean enableStreamManagement() {
1653 final boolean streamManagement =
1654 this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1655 if (streamManagement) {
1656 synchronized (this.mStanzaQueue) {
1657 final EnablePacket enable = new EnablePacket();
1658 tagWriter.writeStanzaAsync(enable);
1659 stanzasSent = 0;
1660 mStanzaQueue.clear();
1661 }
1662 return true;
1663 } else {
1664 return false;
1665 }
1666 }
1667
1668 private void sendPostBindInitialization(
1669 final boolean waitForDisco, final boolean carbonsEnabled) {
1670 features.carbonsEnabled = carbonsEnabled;
1671 features.blockListRequested = false;
1672 synchronized (this.disco) {
1673 this.disco.clear();
1674 }
1675 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1676 mPendingServiceDiscoveries.set(0);
1677 if (!waitForDisco
1678 || Patches.DISCO_EXCEPTIONS.contains(
1679 account.getJid().getDomain().toEscapedString())) {
1680 Log.d(
1681 Config.LOGTAG,
1682 account.getJid().asBareJid() + ": do not wait for service discovery");
1683 mWaitForDisco.set(false);
1684 } else {
1685 mWaitForDisco.set(true);
1686 }
1687 lastDiscoStarted = SystemClock.elapsedRealtime();
1688 mXmppConnectionService.scheduleWakeUpCall(
1689 Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1690 Element caps = streamFeatures.findChild("c");
1691 final String hash = caps == null ? null : caps.getAttribute("hash");
1692 final String ver = caps == null ? null : caps.getAttribute("ver");
1693 ServiceDiscoveryResult discoveryResult = null;
1694 if (hash != null && ver != null) {
1695 discoveryResult =
1696 mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1697 }
1698 final boolean requestDiscoItemsFirst =
1699 !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1700 if (requestDiscoItemsFirst) {
1701 sendServiceDiscoveryItems(account.getDomain());
1702 }
1703 if (discoveryResult == null) {
1704 sendServiceDiscoveryInfo(account.getDomain());
1705 } else {
1706 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1707 disco.put(account.getDomain(), discoveryResult);
1708 }
1709 discoverMamPreferences();
1710 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1711 if (!requestDiscoItemsFirst) {
1712 sendServiceDiscoveryItems(account.getDomain());
1713 }
1714
1715 if (!mWaitForDisco.get()) {
1716 finalizeBind();
1717 }
1718 this.lastSessionStarted = SystemClock.elapsedRealtime();
1719 }
1720
1721 private void sendServiceDiscoveryInfo(final Jid jid) {
1722 mPendingServiceDiscoveries.incrementAndGet();
1723 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1724 iq.setTo(jid);
1725 iq.query("http://jabber.org/protocol/disco#info");
1726 this.sendIqPacket(
1727 iq,
1728 (account, packet) -> {
1729 if (packet.getType() == IqPacket.TYPE.RESULT) {
1730 boolean advancedStreamFeaturesLoaded;
1731 synchronized (XmppConnection.this.disco) {
1732 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1733 if (jid.equals(account.getDomain())) {
1734 mXmppConnectionService.databaseBackend.insertDiscoveryResult(
1735 result);
1736 }
1737 disco.put(jid, result);
1738 advancedStreamFeaturesLoaded =
1739 disco.containsKey(account.getDomain())
1740 && disco.containsKey(account.getJid().asBareJid());
1741 }
1742 if (advancedStreamFeaturesLoaded
1743 && (jid.equals(account.getDomain())
1744 || jid.equals(account.getJid().asBareJid()))) {
1745 enableAdvancedStreamFeatures();
1746 }
1747 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1748 Log.d(
1749 Config.LOGTAG,
1750 account.getJid().asBareJid()
1751 + ": could not query disco info for "
1752 + jid.toString());
1753 final boolean serverOrAccount =
1754 jid.equals(account.getDomain())
1755 || jid.equals(account.getJid().asBareJid());
1756 final boolean advancedStreamFeaturesLoaded;
1757 if (serverOrAccount) {
1758 synchronized (XmppConnection.this.disco) {
1759 disco.put(jid, ServiceDiscoveryResult.empty());
1760 advancedStreamFeaturesLoaded =
1761 disco.containsKey(account.getDomain())
1762 && disco.containsKey(account.getJid().asBareJid());
1763 }
1764 } else {
1765 advancedStreamFeaturesLoaded = false;
1766 }
1767 if (advancedStreamFeaturesLoaded) {
1768 enableAdvancedStreamFeatures();
1769 }
1770 }
1771 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1772 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1773 && mWaitForDisco.compareAndSet(true, false)) {
1774 finalizeBind();
1775 }
1776 }
1777 });
1778 }
1779
1780 private void discoverMamPreferences() {
1781 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1782 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1783 sendIqPacket(
1784 request,
1785 (account, response) -> {
1786 if (response.getType() == IqPacket.TYPE.RESULT) {
1787 Element prefs =
1788 response.findChild(
1789 "prefs", MessageArchiveService.Version.MAM_2.namespace);
1790 isMamPreferenceAlways =
1791 "always"
1792 .equals(
1793 prefs == null
1794 ? null
1795 : prefs.getAttribute("default"));
1796 }
1797 });
1798 }
1799
1800 private void discoverCommands() {
1801 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1802 request.setTo(account.getDomain());
1803 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1804 sendIqPacket(
1805 request,
1806 (account, response) -> {
1807 if (response.getType() == IqPacket.TYPE.RESULT) {
1808 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1809 if (query == null) {
1810 return;
1811 }
1812 final HashMap<String, Jid> commands = new HashMap<>();
1813 for (final Element child : query.getChildren()) {
1814 if ("item".equals(child.getName())) {
1815 final String node = child.getAttribute("node");
1816 final Jid jid = child.getAttributeAsJid("jid");
1817 if (node != null && jid != null) {
1818 commands.put(node, jid);
1819 }
1820 }
1821 }
1822 Log.d(Config.LOGTAG, commands.toString());
1823 synchronized (this.commands) {
1824 this.commands.clear();
1825 this.commands.putAll(commands);
1826 }
1827 }
1828 });
1829 }
1830
1831 public boolean isMamPreferenceAlways() {
1832 return isMamPreferenceAlways;
1833 }
1834
1835 private void finalizeBind() {
1836 Log.d(
1837 Config.LOGTAG,
1838 account.getJid().asBareJid() + ": online with resource " + account.getResource());
1839 if (bindListener != null) {
1840 bindListener.onBind(account);
1841 }
1842 changeStatus(Account.State.ONLINE);
1843 }
1844
1845 private void enableAdvancedStreamFeatures() {
1846 if (getFeatures().blocking() && !features.blockListRequested) {
1847 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1848 this.sendIqPacket(
1849 getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1850 }
1851 for (final OnAdvancedStreamFeaturesLoaded listener :
1852 advancedStreamFeaturesLoadedListeners) {
1853 listener.onAdvancedStreamFeaturesAvailable(account);
1854 }
1855 if (getFeatures().carbons() && !features.carbonsEnabled) {
1856 sendEnableCarbons();
1857 }
1858 if (getFeatures().commands()) {
1859 discoverCommands();
1860 }
1861 }
1862
1863 private void sendServiceDiscoveryItems(final Jid server) {
1864 mPendingServiceDiscoveries.incrementAndGet();
1865 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1866 iq.setTo(server.getDomain());
1867 iq.query("http://jabber.org/protocol/disco#items");
1868 this.sendIqPacket(
1869 iq,
1870 (account, packet) -> {
1871 if (packet.getType() == IqPacket.TYPE.RESULT) {
1872 final HashSet<Jid> items = new HashSet<>();
1873 final List<Element> elements = packet.query().getChildren();
1874 for (final Element element : elements) {
1875 if (element.getName().equals("item")) {
1876 final Jid jid =
1877 InvalidJid.getNullForInvalid(
1878 element.getAttributeAsJid("jid"));
1879 if (jid != null && !jid.equals(account.getDomain())) {
1880 items.add(jid);
1881 }
1882 }
1883 }
1884 for (Jid jid : items) {
1885 sendServiceDiscoveryInfo(jid);
1886 }
1887 } else {
1888 Log.d(
1889 Config.LOGTAG,
1890 account.getJid().asBareJid()
1891 + ": could not query disco items of "
1892 + server);
1893 }
1894 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1895 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1896 && mWaitForDisco.compareAndSet(true, false)) {
1897 finalizeBind();
1898 }
1899 }
1900 });
1901 }
1902
1903 private void sendEnableCarbons() {
1904 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1905 iq.addChild("enable", Namespace.CARBONS);
1906 this.sendIqPacket(
1907 iq,
1908 (account, packet) -> {
1909 if (packet.getType() == IqPacket.TYPE.RESULT) {
1910 Log.d(
1911 Config.LOGTAG,
1912 account.getJid().asBareJid() + ": successfully enabled carbons");
1913 features.carbonsEnabled = true;
1914 } else {
1915 Log.d(
1916 Config.LOGTAG,
1917 account.getJid().asBareJid()
1918 + ": could not enable carbons "
1919 + packet);
1920 }
1921 });
1922 }
1923
1924 private void processStreamError(final Tag currentTag) throws IOException {
1925 final Element streamError = tagReader.readElement(currentTag);
1926 if (streamError == null) {
1927 return;
1928 }
1929 if (streamError.hasChild("conflict")) {
1930 account.setResource(createNewResource());
1931 Log.d(
1932 Config.LOGTAG,
1933 account.getJid().asBareJid()
1934 + ": switching resource due to conflict ("
1935 + account.getResource()
1936 + ")");
1937 throw new IOException();
1938 } else if (streamError.hasChild("host-unknown")) {
1939 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1940 } else if (streamError.hasChild("policy-violation")) {
1941 this.lastConnect = SystemClock.elapsedRealtime();
1942 final String text = streamError.findChildContent("text");
1943 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1944 failPendingMessages(text);
1945 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1946 } else {
1947 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
1948 throw new StateChangingException(Account.State.STREAM_ERROR);
1949 }
1950 }
1951
1952 private void failPendingMessages(final String error) {
1953 synchronized (this.mStanzaQueue) {
1954 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1955 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1956 if (stanza instanceof MessagePacket) {
1957 final MessagePacket packet = (MessagePacket) stanza;
1958 final String id = packet.getId();
1959 final Jid to = packet.getTo();
1960 mXmppConnectionService.markMessage(
1961 account, to.asBareJid(), id, Message.STATUS_SEND_FAILED, error);
1962 }
1963 }
1964 }
1965 }
1966
1967 private void sendStartStream() throws IOException {
1968 final Tag stream = Tag.start("stream:stream");
1969 stream.setAttribute("to", account.getServer());
1970 stream.setAttribute("version", "1.0");
1971 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1972 stream.setAttribute("xmlns", "jabber:client");
1973 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1974 tagWriter.writeTag(stream);
1975 }
1976
1977 private String createNewResource() {
1978 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1979 }
1980
1981 private String nextRandomId() {
1982 return nextRandomId(false);
1983 }
1984
1985 private String nextRandomId(final boolean s) {
1986 return CryptoHelper.random(s ? 3 : 9);
1987 }
1988
1989 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1990 packet.setFrom(account.getJid());
1991 return this.sendUnmodifiedIqPacket(packet, callback, false);
1992 }
1993
1994 public synchronized String sendUnmodifiedIqPacket(
1995 final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1996 if (packet.getId() == null) {
1997 packet.setAttribute("id", nextRandomId());
1998 }
1999 if (callback != null) {
2000 synchronized (this.packetCallbacks) {
2001 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
2002 }
2003 }
2004 this.sendPacket(packet, force);
2005 return packet.getId();
2006 }
2007
2008 public void sendMessagePacket(final MessagePacket packet) {
2009 this.sendPacket(packet);
2010 }
2011
2012 public void sendPresencePacket(final PresencePacket packet) {
2013 this.sendPacket(packet);
2014 }
2015
2016 private synchronized void sendPacket(final AbstractStanza packet) {
2017 sendPacket(packet, false);
2018 }
2019
2020 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
2021 if (stanzasSent == Integer.MAX_VALUE) {
2022 resetStreamId();
2023 disconnect(true);
2024 return;
2025 }
2026 synchronized (this.mStanzaQueue) {
2027 if (force || isBound) {
2028 tagWriter.writeStanzaAsync(packet);
2029 } else {
2030 Log.d(
2031 Config.LOGTAG,
2032 account.getJid().asBareJid()
2033 + " do not write stanza to unbound stream "
2034 + packet.toString());
2035 }
2036 if (packet instanceof AbstractAcknowledgeableStanza) {
2037 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
2038
2039 if (this.mStanzaQueue.size() != 0) {
2040 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
2041 if (currentHighestKey != stanzasSent) {
2042 throw new AssertionError("Stanza count messed up");
2043 }
2044 }
2045
2046 ++stanzasSent;
2047 this.mStanzaQueue.append(stanzasSent, stanza);
2048 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
2049 if (Config.EXTENDED_SM_LOGGING) {
2050 Log.d(
2051 Config.LOGTAG,
2052 account.getJid().asBareJid()
2053 + ": requesting ack for message stanza #"
2054 + stanzasSent);
2055 }
2056 tagWriter.writeStanzaAsync(new RequestPacket());
2057 }
2058 }
2059 }
2060 }
2061
2062 public void sendPing() {
2063 if (!r()) {
2064 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2065 iq.setFrom(account.getJid());
2066 iq.addChild("ping", Namespace.PING);
2067 this.sendIqPacket(iq, null);
2068 }
2069 this.lastPingSent = SystemClock.elapsedRealtime();
2070 }
2071
2072 public void setOnMessagePacketReceivedListener(final OnMessagePacketReceived listener) {
2073 this.messageListener = listener;
2074 }
2075
2076 public void setOnUnregisteredIqPacketReceivedListener(final OnIqPacketReceived listener) {
2077 this.unregisteredIqListener = listener;
2078 }
2079
2080 public void setOnPresencePacketReceivedListener(final OnPresencePacketReceived listener) {
2081 this.presenceListener = listener;
2082 }
2083
2084 public void setOnJinglePacketReceivedListener(final OnJinglePacketReceived listener) {
2085 this.jingleListener = listener;
2086 }
2087
2088 public void setOnStatusChangedListener(final OnStatusChanged listener) {
2089 this.statusListener = listener;
2090 }
2091
2092 public void setOnBindListener(final OnBindListener listener) {
2093 this.bindListener = listener;
2094 }
2095
2096 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
2097 this.acknowledgedListener = listener;
2098 }
2099
2100 public void addOnAdvancedStreamFeaturesAvailableListener(
2101 final OnAdvancedStreamFeaturesLoaded listener) {
2102 this.advancedStreamFeaturesLoadedListeners.add(listener);
2103 }
2104
2105 private void forceCloseSocket() {
2106 FileBackend.close(this.socket);
2107 FileBackend.close(this.tagReader);
2108 }
2109
2110 public void interrupt() {
2111 if (this.mThread != null) {
2112 this.mThread.interrupt();
2113 }
2114 }
2115
2116 public void disconnect(final boolean force) {
2117 interrupt();
2118 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
2119 if (force) {
2120 forceCloseSocket();
2121 } else {
2122 final TagWriter currentTagWriter = this.tagWriter;
2123 if (currentTagWriter.isActive()) {
2124 currentTagWriter.finish();
2125 final Socket currentSocket = this.socket;
2126 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
2127 try {
2128 currentTagWriter.await(1, TimeUnit.SECONDS);
2129 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
2130 currentTagWriter.writeTag(Tag.end("stream:stream"));
2131 if (streamCountDownLatch != null) {
2132 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
2133 Log.d(
2134 Config.LOGTAG,
2135 account.getJid().asBareJid() + ": remote ended stream");
2136 } else {
2137 Log.d(
2138 Config.LOGTAG,
2139 account.getJid().asBareJid()
2140 + ": remote has not closed socket. force closing");
2141 }
2142 }
2143 } catch (InterruptedException e) {
2144 Log.d(
2145 Config.LOGTAG,
2146 account.getJid().asBareJid()
2147 + ": interrupted while gracefully closing stream");
2148 } catch (final IOException e) {
2149 Log.d(
2150 Config.LOGTAG,
2151 account.getJid().asBareJid()
2152 + ": io exception during disconnect ("
2153 + e.getMessage()
2154 + ")");
2155 } finally {
2156 FileBackend.close(currentSocket);
2157 }
2158 } else {
2159 forceCloseSocket();
2160 }
2161 }
2162 }
2163
2164 private void resetStreamId() {
2165 this.streamId = null;
2166 }
2167
2168 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
2169 synchronized (this.disco) {
2170 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
2171 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
2172 if (cursor.getValue().getFeatures().contains(feature)) {
2173 items.add(cursor);
2174 }
2175 }
2176 return items;
2177 }
2178 }
2179
2180 public Jid findDiscoItemByFeature(final String feature) {
2181 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
2182 if (items.size() >= 1) {
2183 return items.get(0).getKey();
2184 }
2185 return null;
2186 }
2187
2188 public boolean r() {
2189 if (getFeatures().sm()) {
2190 this.tagWriter.writeStanzaAsync(new RequestPacket());
2191 return true;
2192 } else {
2193 return false;
2194 }
2195 }
2196
2197 public List<String> getMucServersWithholdAccount() {
2198 final List<String> servers = getMucServers();
2199 servers.remove(account.getDomain().toEscapedString());
2200 return servers;
2201 }
2202
2203 public List<String> getMucServers() {
2204 List<String> servers = new ArrayList<>();
2205 synchronized (this.disco) {
2206 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
2207 final ServiceDiscoveryResult value = cursor.getValue();
2208 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
2209 && value.hasIdentity("conference", "text")
2210 && !value.getFeatures().contains("jabber:iq:gateway")
2211 && !value.hasIdentity("conference", "irc")) {
2212 servers.add(cursor.getKey().toString());
2213 }
2214 }
2215 }
2216 return servers;
2217 }
2218
2219 public String getMucServer() {
2220 List<String> servers = getMucServers();
2221 return servers.size() > 0 ? servers.get(0) : null;
2222 }
2223
2224 public int getTimeToNextAttempt() {
2225 final int additionalTime =
2226 account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
2227 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
2228 final int secondsSinceLast =
2229 (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
2230 return interval - secondsSinceLast;
2231 }
2232
2233 public int getAttempt() {
2234 return this.attempt;
2235 }
2236
2237 public Features getFeatures() {
2238 return this.features;
2239 }
2240
2241 public long getLastSessionEstablished() {
2242 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
2243 return System.currentTimeMillis() - diff;
2244 }
2245
2246 public long getLastConnect() {
2247 return this.lastConnect;
2248 }
2249
2250 public long getLastPingSent() {
2251 return this.lastPingSent;
2252 }
2253
2254 public long getLastDiscoStarted() {
2255 return this.lastDiscoStarted;
2256 }
2257
2258 public long getLastPacketReceived() {
2259 return this.lastPacketReceived;
2260 }
2261
2262 public void sendActive() {
2263 this.sendPacket(new ActivePacket());
2264 }
2265
2266 public void sendInactive() {
2267 this.sendPacket(new InactivePacket());
2268 }
2269
2270 public void resetAttemptCount(boolean resetConnectTime) {
2271 this.attempt = 0;
2272 if (resetConnectTime) {
2273 this.lastConnect = 0;
2274 }
2275 }
2276
2277 public void setInteractive(boolean interactive) {
2278 this.mInteractive = interactive;
2279 }
2280
2281 public Identity getServerIdentity() {
2282 synchronized (this.disco) {
2283 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
2284 if (result == null) {
2285 return Identity.UNKNOWN;
2286 }
2287 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
2288 if (id.getType().equals("im")
2289 && id.getCategory().equals("server")
2290 && id.getName() != null) {
2291 switch (id.getName()) {
2292 case "Prosody":
2293 return Identity.PROSODY;
2294 case "ejabberd":
2295 return Identity.EJABBERD;
2296 case "Slack-XMPP":
2297 return Identity.SLACK;
2298 }
2299 }
2300 }
2301 }
2302 return Identity.UNKNOWN;
2303 }
2304
2305 private IqGenerator getIqGenerator() {
2306 return mXmppConnectionService.getIqGenerator();
2307 }
2308
2309 public enum Identity {
2310 FACEBOOK,
2311 SLACK,
2312 EJABBERD,
2313 PROSODY,
2314 NIMBUZZ,
2315 UNKNOWN
2316 }
2317
2318 private class MyKeyManager implements X509KeyManager {
2319 @Override
2320 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
2321 return account.getPrivateKeyAlias();
2322 }
2323
2324 @Override
2325 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
2326 return null;
2327 }
2328
2329 @Override
2330 public X509Certificate[] getCertificateChain(String alias) {
2331 Log.d(Config.LOGTAG, "getting certificate chain");
2332 try {
2333 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
2334 } catch (final Exception e) {
2335 Log.d(Config.LOGTAG, "could not get certificate chain", e);
2336 return new X509Certificate[0];
2337 }
2338 }
2339
2340 @Override
2341 public String[] getClientAliases(String s, Principal[] principals) {
2342 final String alias = account.getPrivateKeyAlias();
2343 return alias != null ? new String[] {alias} : new String[0];
2344 }
2345
2346 @Override
2347 public String[] getServerAliases(String s, Principal[] principals) {
2348 return new String[0];
2349 }
2350
2351 @Override
2352 public PrivateKey getPrivateKey(String alias) {
2353 try {
2354 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
2355 } catch (Exception e) {
2356 return null;
2357 }
2358 }
2359 }
2360
2361 private static class StateChangingError extends Error {
2362 private final Account.State state;
2363
2364 public StateChangingError(Account.State state) {
2365 this.state = state;
2366 }
2367 }
2368
2369 private static class StateChangingException extends IOException {
2370 private final Account.State state;
2371
2372 public StateChangingException(Account.State state) {
2373 this.state = state;
2374 }
2375 }
2376
2377 public class Features {
2378 XmppConnection connection;
2379 private boolean carbonsEnabled = false;
2380 private boolean encryptionEnabled = false;
2381 private boolean blockListRequested = false;
2382
2383 public Features(final XmppConnection connection) {
2384 this.connection = connection;
2385 }
2386
2387 private boolean hasDiscoFeature(final Jid server, final String feature) {
2388 synchronized (XmppConnection.this.disco) {
2389 final ServiceDiscoveryResult sdr = connection.disco.get(server);
2390 return sdr != null && sdr.getFeatures().contains(feature);
2391 }
2392 }
2393
2394 public boolean carbons() {
2395 return hasDiscoFeature(account.getDomain(), Namespace.CARBONS);
2396 }
2397
2398 public boolean commands() {
2399 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2400 }
2401
2402 public boolean easyOnboardingInvites() {
2403 synchronized (commands) {
2404 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2405 }
2406 }
2407
2408 public boolean bookmarksConversion() {
2409 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION)
2410 && pepPublishOptions();
2411 }
2412
2413 public boolean avatarConversion() {
2414 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION)
2415 && pepPublishOptions();
2416 }
2417
2418 public boolean blocking() {
2419 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2420 }
2421
2422 public boolean spamReporting() {
2423 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
2424 }
2425
2426 public boolean flexibleOfflineMessageRetrieval() {
2427 return hasDiscoFeature(
2428 account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2429 }
2430
2431 public boolean register() {
2432 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2433 }
2434
2435 public boolean invite() {
2436 return connection.streamFeatures != null
2437 && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2438 }
2439
2440 public boolean sm() {
2441 return streamId != null
2442 || (connection.streamFeatures != null
2443 && connection.streamFeatures.hasChild("sm"));
2444 }
2445
2446 public boolean csi() {
2447 return connection.streamFeatures != null
2448 && connection.streamFeatures.hasChild("csi", Namespace.CSI);
2449 }
2450
2451 public boolean pep() {
2452 synchronized (XmppConnection.this.disco) {
2453 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2454 return info != null && info.hasIdentity("pubsub", "pep");
2455 }
2456 }
2457
2458 public boolean pepPersistent() {
2459 synchronized (XmppConnection.this.disco) {
2460 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2461 return info != null
2462 && info.getFeatures()
2463 .contains("http://jabber.org/protocol/pubsub#persistent-items");
2464 }
2465 }
2466
2467 public boolean pepPublishOptions() {
2468 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2469 }
2470
2471 public boolean pepOmemoWhitelisted() {
2472 return hasDiscoFeature(
2473 account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2474 }
2475
2476 public boolean mam() {
2477 return MessageArchiveService.Version.has(getAccountFeatures());
2478 }
2479
2480 public List<String> getAccountFeatures() {
2481 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2482 return result == null ? Collections.emptyList() : result.getFeatures();
2483 }
2484
2485 public boolean push() {
2486 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2487 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2488 }
2489
2490 public boolean rosterVersioning() {
2491 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2492 }
2493
2494 public void setBlockListRequested(boolean value) {
2495 this.blockListRequested = value;
2496 }
2497
2498 public boolean httpUpload(long filesize) {
2499 if (Config.DISABLE_HTTP_UPLOAD) {
2500 return false;
2501 } else {
2502 for (String namespace :
2503 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2504 List<Entry<Jid, ServiceDiscoveryResult>> items =
2505 findDiscoItemsByFeature(namespace);
2506 if (items.size() > 0) {
2507 try {
2508 long maxsize =
2509 Long.parseLong(
2510 items.get(0)
2511 .getValue()
2512 .getExtendedDiscoInformation(
2513 namespace, "max-file-size"));
2514 if (filesize <= maxsize) {
2515 return true;
2516 } else {
2517 Log.d(
2518 Config.LOGTAG,
2519 account.getJid().asBareJid()
2520 + ": http upload is not available for files with size "
2521 + filesize
2522 + " (max is "
2523 + maxsize
2524 + ")");
2525 return false;
2526 }
2527 } catch (Exception e) {
2528 return true;
2529 }
2530 }
2531 }
2532 return false;
2533 }
2534 }
2535
2536 public boolean useLegacyHttpUpload() {
2537 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null
2538 && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2539 }
2540
2541 public long getMaxHttpUploadSize() {
2542 for (String namespace :
2543 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2544 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2545 if (items.size() > 0) {
2546 try {
2547 return Long.parseLong(
2548 items.get(0)
2549 .getValue()
2550 .getExtendedDiscoInformation(namespace, "max-file-size"));
2551 } catch (Exception e) {
2552 // ignored
2553 }
2554 }
2555 }
2556 return -1;
2557 }
2558
2559 public boolean stanzaIds() {
2560 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2561 }
2562
2563 public boolean bookmarks2() {
2564 return Config
2565 .USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
2566 }
2567
2568 public boolean externalServiceDiscovery() {
2569 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2570 }
2571 }
2572}