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 account.setPinnedMechanism(saslMechanism);
696 if (version == SaslMechanism.Version.SASL_2) {
697 final String authorizationIdentifier =
698 success.findChildContent("authorization-identifier");
699 final Jid authorizationJid;
700 try {
701 authorizationJid =
702 Strings.isNullOrEmpty(authorizationIdentifier)
703 ? null
704 : Jid.ofEscaped(authorizationIdentifier);
705 } catch (final IllegalArgumentException e) {
706 Log.d(
707 Config.LOGTAG,
708 account.getJid().asBareJid()
709 + ": SASL 2.0 authorization identifier was not a valid jid");
710 throw new StateChangingException(Account.State.BIND_FAILURE);
711 }
712 if (authorizationJid == null) {
713 throw new StateChangingException(Account.State.BIND_FAILURE);
714 }
715 Log.d(
716 Config.LOGTAG,
717 account.getJid().asBareJid()
718 + ": SASL 2.0 authorization identifier was "
719 + authorizationJid);
720 if (!account.getJid().getDomain().equals(authorizationJid.getDomain())) {
721 Log.d(
722 Config.LOGTAG,
723 account.getJid().asBareJid()
724 + ": server tried to re-assign domain to "
725 + authorizationJid.getDomain());
726 throw new StateChangingError(Account.State.BIND_FAILURE);
727 }
728 if (authorizationJid.isFullJid() && account.setJid(authorizationJid)) {
729 Log.d(
730 Config.LOGTAG,
731 account.getJid().asBareJid()
732 + ": jid changed during SASL 2.0. updating database");
733 mXmppConnectionService.databaseBackend.updateAccount(account);
734 }
735 final Element bound = success.findChild("bound", Namespace.BIND2);
736 final Element resumed = success.findChild("resumed", "urn:xmpp:sm:3");
737 final Element failed = success.findChild("failed", "urn:xmpp:sm:3");
738 // TODO check if resumed and bound exist and throw bind failure
739 if (resumed != null && streamId != null) {
740 processResumed(resumed);
741 } else if (failed != null) {
742 processFailed(failed, false); // wait for new stream features
743 }
744 if (bound != null) {
745 this.isBound = true;
746 final Element streamManagementEnabled =
747 bound.findChild("enabled", Namespace.STREAM_MANAGEMENT);
748 final Element carbonsEnabled = bound.findChild("enabled", Namespace.CARBONS);
749 if (streamManagementEnabled != null) {
750 processEnabled(streamManagementEnabled);
751 }
752 if (carbonsEnabled != null) {
753 Log.d(
754 Config.LOGTAG,
755 account.getJid().asBareJid() + ": successfully enabled carbons");
756 features.carbonsEnabled = true;
757 }
758 // TODO if both are set mark account ready for pipelining
759 sendPostBindInitialization(streamManagementEnabled != null, carbonsEnabled != null);
760 }
761 }
762 if (version == SaslMechanism.Version.SASL) {
763 tagReader.reset();
764 sendStartStream();
765 final Tag tag = tagReader.readTag();
766 if (tag != null && tag.isStart("stream")) {
767 processStream();
768 return true;
769 } else {
770 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
771 }
772 } else {
773 return false;
774 }
775 }
776
777 private void processFailure(final Element failure) throws StateChangingException {
778 final SaslMechanism.Version version;
779 try {
780 version = SaslMechanism.Version.of(failure);
781 } catch (final IllegalArgumentException e) {
782 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
783 }
784 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
785 if (failure.hasChild("temporary-auth-failure")) {
786 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
787 } else if (failure.hasChild("account-disabled")) {
788 final String text = failure.findChildContent("text");
789 if (Strings.isNullOrEmpty(text)) {
790 throw new StateChangingException(Account.State.UNAUTHORIZED);
791 }
792 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
793 if (matcher.find()) {
794 final HttpUrl url;
795 try {
796 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
797 } catch (final IllegalArgumentException e) {
798 throw new StateChangingException(Account.State.UNAUTHORIZED);
799 }
800 if (url.isHttps()) {
801 this.redirectionUrl = url;
802 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
803 }
804 }
805 }
806 throw new StateChangingException(Account.State.UNAUTHORIZED);
807 }
808
809 private static SSLSocket sslSocketOrNull(final Socket socket) {
810 if (socket instanceof SSLSocket) {
811 return (SSLSocket) socket;
812 } else {
813 return null;
814 }
815 }
816
817 private void processEnabled(final Element enabled) {
818 final String streamId;
819 if (enabled.getAttributeAsBoolean("resume")) {
820 streamId = enabled.getAttribute("id");
821 Log.d(
822 Config.LOGTAG,
823 account.getJid().asBareJid().toString()
824 + ": stream management enabled (resumable)");
825 } else {
826 Log.d(
827 Config.LOGTAG,
828 account.getJid().asBareJid().toString() + ": stream management enabled");
829 streamId = null;
830 }
831 this.streamId = streamId;
832 this.stanzasReceived = 0;
833 this.inSmacksSession = true;
834 final RequestPacket r = new RequestPacket();
835 tagWriter.writeStanzaAsync(r);
836 }
837
838 private void processResumed(final Element resumed) throws StateChangingException {
839 this.inSmacksSession = true;
840 this.isBound = true;
841 this.tagWriter.writeStanzaAsync(new RequestPacket());
842 lastPacketReceived = SystemClock.elapsedRealtime();
843 final String h = resumed.getAttribute("h");
844 if (h == null) {
845 resetStreamId();
846 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
847 }
848 final int serverCount;
849 try {
850 serverCount = Integer.parseInt(h);
851 } catch (final NumberFormatException e) {
852 resetStreamId();
853 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
854 }
855 final ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
856 final boolean acknowledgedMessages;
857 synchronized (this.mStanzaQueue) {
858 if (serverCount < stanzasSent) {
859 Log.d(
860 Config.LOGTAG,
861 account.getJid().asBareJid() + ": session resumed with lost packages");
862 stanzasSent = serverCount;
863 } else {
864 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": session resumed");
865 }
866 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
867 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
868 failedStanzas.add(mStanzaQueue.valueAt(i));
869 }
870 mStanzaQueue.clear();
871 }
872 if (acknowledgedMessages) {
873 mXmppConnectionService.updateConversationUi();
874 }
875 Log.d(
876 Config.LOGTAG,
877 account.getJid().asBareJid() + ": resending " + failedStanzas.size() + " stanzas");
878 for (final AbstractAcknowledgeableStanza packet : failedStanzas) {
879 if (packet instanceof MessagePacket) {
880 MessagePacket message = (MessagePacket) packet;
881 mXmppConnectionService.markMessage(
882 account,
883 message.getTo().asBareJid(),
884 message.getId(),
885 Message.STATUS_UNSEND);
886 }
887 sendPacket(packet);
888 }
889 Log.d(
890 Config.LOGTAG,
891 account.getJid().asBareJid() + ": online with resource " + account.getResource());
892 changeStatus(Account.State.ONLINE);
893 }
894
895 private void processFailed(final Element failed, final boolean sendBindRequest) {
896 final int serverCount;
897 try {
898 serverCount = Integer.parseInt(failed.getAttribute("h"));
899 } catch (final NumberFormatException | NullPointerException e) {
900 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
901 resetStreamId();
902 if (sendBindRequest) {
903 sendBindRequest();
904 }
905 return;
906 }
907 Log.d(
908 Config.LOGTAG,
909 account.getJid().asBareJid()
910 + ": resumption failed but server acknowledged stanza #"
911 + serverCount);
912 final boolean acknowledgedMessages;
913 synchronized (this.mStanzaQueue) {
914 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
915 }
916 if (acknowledgedMessages) {
917 mXmppConnectionService.updateConversationUi();
918 }
919 resetStreamId();
920 if (sendBindRequest) {
921 sendBindRequest();
922 }
923 }
924
925 private boolean acknowledgeStanzaUpTo(int serverCount) {
926 if (serverCount > stanzasSent) {
927 Log.e(
928 Config.LOGTAG,
929 "server acknowledged more stanzas than we sent. serverCount="
930 + serverCount
931 + ", ourCount="
932 + stanzasSent);
933 }
934 boolean acknowledgedMessages = false;
935 for (int i = 0; i < mStanzaQueue.size(); ++i) {
936 if (serverCount >= mStanzaQueue.keyAt(i)) {
937 if (Config.EXTENDED_SM_LOGGING) {
938 Log.d(
939 Config.LOGTAG,
940 account.getJid().asBareJid()
941 + ": server acknowledged stanza #"
942 + mStanzaQueue.keyAt(i));
943 }
944 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
945 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
946 final MessagePacket packet = (MessagePacket) stanza;
947 final String id = packet.getId();
948 final Jid to = packet.getTo();
949 if (id != null && to != null) {
950 acknowledgedMessages |=
951 acknowledgedListener.onMessageAcknowledged(account, to, id);
952 }
953 }
954 mStanzaQueue.removeAt(i);
955 i--;
956 }
957 }
958 return acknowledgedMessages;
959 }
960
961 private @NonNull Element processPacket(final Tag currentTag, final int packetType)
962 throws IOException {
963 final Element element;
964 switch (packetType) {
965 case PACKET_IQ:
966 element = new IqPacket();
967 break;
968 case PACKET_MESSAGE:
969 element = new MessagePacket();
970 break;
971 case PACKET_PRESENCE:
972 element = new PresencePacket();
973 break;
974 default:
975 throw new AssertionError("Should never encounter invalid type");
976 }
977 element.setAttributes(currentTag.getAttributes());
978 Tag nextTag = tagReader.readTag();
979 if (nextTag == null) {
980 throw new IOException("interrupted mid tag");
981 }
982 while (!nextTag.isEnd(element.getName())) {
983 if (!nextTag.isNo()) {
984 element.addChild(tagReader.readElement(nextTag));
985 }
986 nextTag = tagReader.readTag();
987 if (nextTag == null) {
988 throw new IOException("interrupted mid tag");
989 }
990 }
991 if (stanzasReceived == Integer.MAX_VALUE) {
992 resetStreamId();
993 throw new IOException("time to restart the session. cant handle >2 billion pcks");
994 }
995 if (inSmacksSession) {
996 ++stanzasReceived;
997 } else if (features.sm()) {
998 Log.d(
999 Config.LOGTAG,
1000 account.getJid().asBareJid()
1001 + ": not counting stanza("
1002 + element.getClass().getSimpleName()
1003 + "). Not in smacks session.");
1004 }
1005 lastPacketReceived = SystemClock.elapsedRealtime();
1006 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
1007 Log.d(Config.LOGTAG, "[background stanza] " + element);
1008 }
1009 if (element instanceof IqPacket
1010 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
1011 && element.hasChild("jingle", Namespace.JINGLE)) {
1012 return JinglePacket.upgrade((IqPacket) element);
1013 } else {
1014 return element;
1015 }
1016 }
1017
1018 private void processIq(final Tag currentTag) throws IOException {
1019 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
1020 if (!packet.valid()) {
1021 Log.e(
1022 Config.LOGTAG,
1023 "encountered invalid iq from='"
1024 + packet.getFrom()
1025 + "' to='"
1026 + packet.getTo()
1027 + "'");
1028 return;
1029 }
1030 if (packet instanceof JinglePacket) {
1031 if (this.jingleListener != null) {
1032 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
1033 }
1034 } else {
1035 OnIqPacketReceived callback = null;
1036 synchronized (this.packetCallbacks) {
1037 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple =
1038 packetCallbacks.get(packet.getId());
1039 if (packetCallbackDuple != null) {
1040 // Packets to the server should have responses from the server
1041 if (packetCallbackDuple.first.toServer(account)) {
1042 if (packet.fromServer(account)) {
1043 callback = packetCallbackDuple.second;
1044 packetCallbacks.remove(packet.getId());
1045 } else {
1046 Log.e(
1047 Config.LOGTAG,
1048 account.getJid().asBareJid().toString()
1049 + ": ignoring spoofed iq packet");
1050 }
1051 } else {
1052 if (packet.getFrom() != null
1053 && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
1054 callback = packetCallbackDuple.second;
1055 packetCallbacks.remove(packet.getId());
1056 } else {
1057 Log.e(
1058 Config.LOGTAG,
1059 account.getJid().asBareJid().toString()
1060 + ": ignoring spoofed iq packet");
1061 }
1062 }
1063 } else if (packet.getType() == IqPacket.TYPE.GET
1064 || packet.getType() == IqPacket.TYPE.SET) {
1065 callback = this.unregisteredIqListener;
1066 }
1067 }
1068 if (callback != null) {
1069 try {
1070 callback.onIqPacketReceived(account, packet);
1071 } catch (StateChangingError error) {
1072 throw new StateChangingException(error.state);
1073 }
1074 }
1075 }
1076 }
1077
1078 private void processMessage(final Tag currentTag) throws IOException {
1079 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
1080 if (!packet.valid()) {
1081 Log.e(
1082 Config.LOGTAG,
1083 "encountered invalid message from='"
1084 + packet.getFrom()
1085 + "' to='"
1086 + packet.getTo()
1087 + "'");
1088 return;
1089 }
1090 this.messageListener.onMessagePacketReceived(account, packet);
1091 }
1092
1093 private void processPresence(final Tag currentTag) throws IOException {
1094 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
1095 if (!packet.valid()) {
1096 Log.e(
1097 Config.LOGTAG,
1098 "encountered invalid presence from='"
1099 + packet.getFrom()
1100 + "' to='"
1101 + packet.getTo()
1102 + "'");
1103 return;
1104 }
1105 this.presenceListener.onPresencePacketReceived(account, packet);
1106 }
1107
1108 private void sendStartTLS() throws IOException {
1109 final Tag startTLS = Tag.empty("starttls");
1110 startTLS.setAttribute("xmlns", Namespace.TLS);
1111 tagWriter.writeTag(startTLS);
1112 }
1113
1114 private void switchOverToTls() throws XmlPullParserException, IOException {
1115 tagReader.readTag();
1116 final Socket socket = this.socket;
1117 final SSLSocket sslSocket = upgradeSocketToTls(socket);
1118 tagReader.setInputStream(sslSocket.getInputStream());
1119 tagWriter.setOutputStream(sslSocket.getOutputStream());
1120 sendStartStream();
1121 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
1122 features.encryptionEnabled = true;
1123 final Tag tag = tagReader.readTag();
1124 if (tag != null && tag.isStart("stream")) {
1125 SSLSocketHelper.log(account, sslSocket);
1126 processStream();
1127 } else {
1128 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
1129 }
1130 sslSocket.close();
1131 }
1132
1133 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
1134 final SSLSocketFactory sslSocketFactory;
1135 try {
1136 sslSocketFactory = getSSLSocketFactory();
1137 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
1138 throw new StateChangingException(Account.State.TLS_ERROR);
1139 }
1140 final InetAddress address = socket.getInetAddress();
1141 final SSLSocket sslSocket =
1142 (SSLSocket)
1143 sslSocketFactory.createSocket(
1144 socket, address.getHostAddress(), socket.getPort(), true);
1145 SSLSocketHelper.setSecurity(sslSocket);
1146 SSLSocketHelper.setHostname(sslSocket, IDN.toASCII(account.getServer()));
1147 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
1148 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
1149 try {
1150 if (!xmppDomainVerifier.verify(
1151 account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
1152 Log.d(
1153 Config.LOGTAG,
1154 account.getJid().asBareJid()
1155 + ": TLS certificate domain verification failed");
1156 FileBackend.close(sslSocket);
1157 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
1158 }
1159 } catch (final SSLPeerUnverifiedException e) {
1160 FileBackend.close(sslSocket);
1161 throw new StateChangingException(Account.State.TLS_ERROR);
1162 }
1163 return sslSocket;
1164 }
1165
1166 private void processStreamFeatures(final Tag currentTag) throws IOException {
1167 this.streamFeatures = tagReader.readElement(currentTag);
1168 final boolean isSecure =
1169 features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
1170 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
1171 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
1172 && !features.encryptionEnabled) {
1173 sendStartTLS();
1174 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1175 && account.isOptionSet(Account.OPTION_REGISTER)) {
1176 if (isSecure) {
1177 register();
1178 } else {
1179 Log.d(
1180 Config.LOGTAG,
1181 account.getJid().asBareJid()
1182 + ": unable to find STARTTLS for registration process "
1183 + XmlHelper.printElementNames(this.streamFeatures));
1184 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1185 }
1186 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1187 && account.isOptionSet(Account.OPTION_REGISTER)) {
1188 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
1189 } else if (Config.SASL_2_ENABLED
1190 && this.streamFeatures.hasChild("mechanisms", Namespace.SASL_2)
1191 && shouldAuthenticate
1192 && isSecure) {
1193 authenticate(SaslMechanism.Version.SASL_2);
1194 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
1195 && shouldAuthenticate
1196 && isSecure) {
1197 authenticate(SaslMechanism.Version.SASL);
1198 } else if (this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT)
1199 && streamId != null
1200 && !inSmacksSession) {
1201 if (Config.EXTENDED_SM_LOGGING) {
1202 Log.d(
1203 Config.LOGTAG,
1204 account.getJid().asBareJid()
1205 + ": resuming after stanza #"
1206 + stanzasReceived);
1207 }
1208 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived);
1209 this.mSmCatchupMessageCounter.set(0);
1210 this.mWaitingForSmCatchup.set(true);
1211 this.tagWriter.writeStanzaAsync(resume);
1212 } else if (needsBinding) {
1213 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
1214 sendBindRequest();
1215 } else {
1216 Log.d(
1217 Config.LOGTAG,
1218 account.getJid().asBareJid()
1219 + ": unable to find bind feature "
1220 + XmlHelper.printElementNames(this.streamFeatures));
1221 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1222 }
1223 } else {
1224 Log.d(
1225 Config.LOGTAG,
1226 account.getJid().asBareJid()
1227 + ": received NOP stream features "
1228 + XmlHelper.printElementNames(this.streamFeatures));
1229 }
1230 }
1231
1232 private void authenticate(final SaslMechanism.Version version) throws IOException {
1233 final Element element =
1234 this.streamFeatures.findChild("mechanisms", SaslMechanism.namespace(version));
1235 final Collection<String> mechanisms =
1236 Collections2.transform(
1237 Collections2.filter(
1238 element.getChildren(),
1239 c -> c != null && "mechanism".equals(c.getName())),
1240 c -> c == null ? null : c.getContent());
1241 final Element cbElement =
1242 this.streamFeatures.findChild("sasl-channel-binding", Namespace.CHANNEL_BINDING);
1243 final Collection<ChannelBinding> channelBindings =
1244 Collections2.filter(
1245 Collections2.transform(
1246 Collections2.filter(
1247 cbElement == null
1248 ? Collections.emptyList()
1249 : cbElement.getChildren(),
1250 c -> c != null && "channel-binding".equals(c.getName())),
1251 c -> c == null ? null : ChannelBinding.of(c.getAttribute("type"))),
1252 Predicates.notNull());
1253 Log.d(Config.LOGTAG,"mechanisms: "+mechanisms);
1254 Log.d(Config.LOGTAG, "channel bindings: " + channelBindings);
1255 final SaslMechanism.Factory factory = new SaslMechanism.Factory(account);
1256 this.saslMechanism = factory.of(mechanisms, channelBindings);
1257
1258 if (saslMechanism == null) {
1259 Log.d(
1260 Config.LOGTAG,
1261 account.getJid().asBareJid()
1262 + ": unable to find supported SASL mechanism in "
1263 + mechanisms);
1264 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1265 }
1266 final int pinnedMechanism = account.getPinnedMechanismPriority();
1267 if (pinnedMechanism > saslMechanism.getPriority()) {
1268 Log.e(
1269 Config.LOGTAG,
1270 "Auth failed. Authentication mechanism "
1271 + saslMechanism.getMechanism()
1272 + " has lower priority ("
1273 + saslMechanism.getPriority()
1274 + ") than pinned priority ("
1275 + pinnedMechanism
1276 + "). Possible downgrade attack?");
1277 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1278 }
1279 final String firstMessage = saslMechanism.getClientFirstMessage();
1280 final Element authenticate;
1281 if (version == SaslMechanism.Version.SASL) {
1282 authenticate = new Element("auth", Namespace.SASL);
1283 if (!Strings.isNullOrEmpty(firstMessage)) {
1284 authenticate.setContent(firstMessage);
1285 }
1286 } else if (version == SaslMechanism.Version.SASL_2) {
1287 authenticate = new Element("authenticate", Namespace.SASL_2);
1288 if (!Strings.isNullOrEmpty(firstMessage)) {
1289 authenticate.addChild("initial-response").setContent(firstMessage);
1290 }
1291 final Element inline = this.streamFeatures.findChild("inline", Namespace.SASL_2);
1292 final boolean inlineStreamManagement =
1293 inline != null && inline.hasChild("sm", "urn:xmpp:sm:3");
1294 final boolean inlineBind2 = inline != null && inline.hasChild("bind", Namespace.BIND2);
1295 final Element inlineBindFeatures =
1296 this.streamFeatures.findChild("inline", Namespace.BIND2);
1297 if (inlineBind2 && inlineBindFeatures != null) {
1298 final Element bind =
1299 generateBindRequest(
1300 Collections2.transform(
1301 inlineBindFeatures.getChildren(),
1302 c -> c == null ? null : c.getAttribute("var")));
1303 authenticate.addChild(bind);
1304 }
1305 if (inlineStreamManagement && streamId != null) {
1306 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived);
1307 this.mSmCatchupMessageCounter.set(0);
1308 this.mWaitingForSmCatchup.set(true);
1309 authenticate.addChild(resume);
1310 }
1311 } else {
1312 throw new AssertionError("Missing implementation for " + version);
1313 }
1314
1315 Log.d(
1316 Config.LOGTAG,
1317 account.getJid().toString()
1318 + ": Authenticating with "
1319 + version
1320 + "/"
1321 + saslMechanism.getMechanism());
1322 authenticate.setAttribute("mechanism", saslMechanism.getMechanism());
1323 tagWriter.writeElement(authenticate);
1324 }
1325
1326 private Element generateBindRequest(final Collection<String> bindFeatures) {
1327 Log.d(Config.LOGTAG, "inline bind features: " + bindFeatures);
1328 final Element bind = new Element("bind", Namespace.BIND2);
1329 final Element clientId = bind.addChild("client-id");
1330 clientId.setAttribute("tag", mXmppConnectionService.getString(R.string.app_name));
1331 clientId.setContent(account.getUuid());
1332 final Element features = bind.addChild("features");
1333 if (bindFeatures.contains(Namespace.CARBONS)) {
1334 features.addChild("enable", Namespace.CARBONS);
1335 }
1336 if (bindFeatures.contains(Namespace.STREAM_MANAGEMENT)) {
1337 features.addChild(new EnablePacket());
1338 }
1339 return bind;
1340 }
1341
1342 private static Collection<String> extractMechanisms(final Element stream) {
1343 return Collections2.transform(stream.getChildren(), c -> c == null ? null : c.getContent());
1344 }
1345
1346 private void register() {
1347 final String preAuth = account.getKey(Account.KEY_PRE_AUTH_REGISTRATION_TOKEN);
1348 if (preAuth != null && features.invite()) {
1349 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1350 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1351 sendUnmodifiedIqPacket(
1352 preAuthRequest,
1353 (account, response) -> {
1354 if (response.getType() == IqPacket.TYPE.RESULT) {
1355 sendRegistryRequest();
1356 } else {
1357 final String error = response.getErrorCondition();
1358 Log.d(
1359 Config.LOGTAG,
1360 account.getJid().asBareJid()
1361 + ": failed to pre auth. "
1362 + error);
1363 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1364 }
1365 },
1366 true);
1367 } else {
1368 sendRegistryRequest();
1369 }
1370 }
1371
1372 private void sendRegistryRequest() {
1373 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1374 register.query(Namespace.REGISTER);
1375 register.setTo(account.getDomain());
1376 sendUnmodifiedIqPacket(
1377 register,
1378 (account, packet) -> {
1379 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1380 return;
1381 }
1382 if (packet.getType() == IqPacket.TYPE.ERROR) {
1383 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1384 }
1385 final Element query = packet.query(Namespace.REGISTER);
1386 if (query.hasChild("username") && (query.hasChild("password"))) {
1387 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1388 final Element username =
1389 new Element("username").setContent(account.getUsername());
1390 final Element password =
1391 new Element("password").setContent(account.getPassword());
1392 register1.query(Namespace.REGISTER).addChild(username);
1393 register1.query().addChild(password);
1394 register1.setFrom(account.getJid().asBareJid());
1395 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1396 } else if (query.hasChild("x", Namespace.DATA)) {
1397 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1398 final Element blob = query.findChild("data", "urn:xmpp:bob");
1399 final String id = packet.getId();
1400 InputStream is;
1401 if (blob != null) {
1402 try {
1403 final String base64Blob = blob.getContent();
1404 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1405 is = new ByteArrayInputStream(strBlob);
1406 } catch (Exception e) {
1407 is = null;
1408 }
1409 } else {
1410 final boolean useTor =
1411 mXmppConnectionService.useTorToConnect() || account.isOnion();
1412 try {
1413 final String url = data.getValue("url");
1414 final String fallbackUrl = data.getValue("captcha-fallback-url");
1415 if (url != null) {
1416 is = HttpConnectionManager.open(url, useTor);
1417 } else if (fallbackUrl != null) {
1418 is = HttpConnectionManager.open(fallbackUrl, useTor);
1419 } else {
1420 is = null;
1421 }
1422 } catch (final IOException e) {
1423 Log.d(
1424 Config.LOGTAG,
1425 account.getJid().asBareJid() + ": unable to fetch captcha",
1426 e);
1427 is = null;
1428 }
1429 }
1430
1431 if (is != null) {
1432 Bitmap captcha = BitmapFactory.decodeStream(is);
1433 try {
1434 if (mXmppConnectionService.displayCaptchaRequest(
1435 account, id, data, captcha)) {
1436 return;
1437 }
1438 } catch (Exception e) {
1439 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1440 }
1441 }
1442 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1443 } else if (query.hasChild("instructions")
1444 || query.hasChild("x", Namespace.OOB)) {
1445 final String instructions = query.findChildContent("instructions");
1446 final Element oob = query.findChild("x", Namespace.OOB);
1447 final String url = oob == null ? null : oob.findChildContent("url");
1448 if (url != null) {
1449 setAccountCreationFailed(url);
1450 } else if (instructions != null) {
1451 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1452 if (matcher.find()) {
1453 setAccountCreationFailed(
1454 instructions.substring(matcher.start(), matcher.end()));
1455 }
1456 }
1457 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1458 }
1459 },
1460 true);
1461 }
1462
1463 private void setAccountCreationFailed(final String url) {
1464 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1465 if (httpUrl != null && httpUrl.isHttps()) {
1466 this.redirectionUrl = httpUrl;
1467 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1468 }
1469 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1470 }
1471
1472 public HttpUrl getRedirectionUrl() {
1473 return this.redirectionUrl;
1474 }
1475
1476 public void resetEverything() {
1477 resetAttemptCount(true);
1478 resetStreamId();
1479 clearIqCallbacks();
1480 this.stanzasSent = 0;
1481 mStanzaQueue.clear();
1482 this.redirectionUrl = null;
1483 synchronized (this.disco) {
1484 disco.clear();
1485 }
1486 synchronized (this.commands) {
1487 this.commands.clear();
1488 }
1489 }
1490
1491 private void sendBindRequest() {
1492 try {
1493 mXmppConnectionService.restoredFromDatabaseLatch.await();
1494 } catch (InterruptedException e) {
1495 Log.d(
1496 Config.LOGTAG,
1497 account.getJid().asBareJid()
1498 + ": interrupted while waiting for DB restore during bind");
1499 return;
1500 }
1501 clearIqCallbacks();
1502 if (account.getJid().isBareJid()) {
1503 account.setResource(this.createNewResource());
1504 } else {
1505 fixResource(mXmppConnectionService, account);
1506 }
1507 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1508 final String resource =
1509 Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1510 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1511 this.sendUnmodifiedIqPacket(
1512 iq,
1513 (account, packet) -> {
1514 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1515 return;
1516 }
1517 final Element bind = packet.findChild("bind");
1518 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1519 isBound = true;
1520 final Element jid = bind.findChild("jid");
1521 if (jid != null && jid.getContent() != null) {
1522 try {
1523 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1524 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1525 Log.d(
1526 Config.LOGTAG,
1527 account.getJid().asBareJid()
1528 + ": server tried to re-assign domain to "
1529 + assignedJid.getDomain());
1530 throw new StateChangingError(Account.State.BIND_FAILURE);
1531 }
1532 if (account.setJid(assignedJid)) {
1533 Log.d(
1534 Config.LOGTAG,
1535 account.getJid().asBareJid()
1536 + ": jid changed during bind. updating database");
1537 mXmppConnectionService.databaseBackend.updateAccount(account);
1538 }
1539 if (streamFeatures.hasChild("session")
1540 && !streamFeatures
1541 .findChild("session")
1542 .hasChild("optional")) {
1543 sendStartSession();
1544 } else {
1545 final boolean waitForDisco = enableStreamManagement();
1546 sendPostBindInitialization(waitForDisco, false);
1547 }
1548 return;
1549 } catch (final IllegalArgumentException e) {
1550 Log.d(
1551 Config.LOGTAG,
1552 account.getJid().asBareJid()
1553 + ": server reported invalid jid ("
1554 + jid.getContent()
1555 + ") on bind");
1556 }
1557 } else {
1558 Log.d(
1559 Config.LOGTAG,
1560 account.getJid()
1561 + ": disconnecting because of bind failure. (no jid)");
1562 }
1563 } else {
1564 Log.d(
1565 Config.LOGTAG,
1566 account.getJid()
1567 + ": disconnecting because of bind failure ("
1568 + packet);
1569 }
1570 final Element error = packet.findChild("error");
1571 if (packet.getType() == IqPacket.TYPE.ERROR
1572 && error != null
1573 && error.hasChild("conflict")) {
1574 account.setResource(createNewResource());
1575 }
1576 throw new StateChangingError(Account.State.BIND_FAILURE);
1577 },
1578 true);
1579 }
1580
1581 private void clearIqCallbacks() {
1582 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1583 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1584 synchronized (this.packetCallbacks) {
1585 if (this.packetCallbacks.size() == 0) {
1586 return;
1587 }
1588 Log.d(
1589 Config.LOGTAG,
1590 account.getJid().asBareJid()
1591 + ": clearing "
1592 + this.packetCallbacks.size()
1593 + " iq callbacks");
1594 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator =
1595 this.packetCallbacks.values().iterator();
1596 while (iterator.hasNext()) {
1597 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1598 callbacks.add(entry.second);
1599 iterator.remove();
1600 }
1601 }
1602 for (OnIqPacketReceived callback : callbacks) {
1603 try {
1604 callback.onIqPacketReceived(account, failurePacket);
1605 } catch (StateChangingError error) {
1606 Log.d(
1607 Config.LOGTAG,
1608 account.getJid().asBareJid()
1609 + ": caught StateChangingError("
1610 + error.state.toString()
1611 + ") while clearing callbacks");
1612 // ignore
1613 }
1614 }
1615 Log.d(
1616 Config.LOGTAG,
1617 account.getJid().asBareJid()
1618 + ": done clearing iq callbacks. "
1619 + this.packetCallbacks.size()
1620 + " left");
1621 }
1622
1623 public void sendDiscoTimeout() {
1624 if (mWaitForDisco.compareAndSet(true, false)) {
1625 Log.d(
1626 Config.LOGTAG,
1627 account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1628 finalizeBind();
1629 }
1630 }
1631
1632 private void sendStartSession() {
1633 Log.d(
1634 Config.LOGTAG,
1635 account.getJid().asBareJid() + ": sending legacy session to outdated server");
1636 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1637 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1638 this.sendUnmodifiedIqPacket(
1639 startSession,
1640 (account, packet) -> {
1641 if (packet.getType() == IqPacket.TYPE.RESULT) {
1642 final boolean waitForDisco = enableStreamManagement();
1643 sendPostBindInitialization(waitForDisco, false);
1644 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1645 throw new StateChangingError(Account.State.SESSION_FAILURE);
1646 }
1647 },
1648 true);
1649 }
1650
1651 private boolean enableStreamManagement() {
1652 final boolean streamManagement =
1653 this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1654 if (streamManagement) {
1655 synchronized (this.mStanzaQueue) {
1656 final EnablePacket enable = new EnablePacket();
1657 tagWriter.writeStanzaAsync(enable);
1658 stanzasSent = 0;
1659 mStanzaQueue.clear();
1660 }
1661 return true;
1662 } else {
1663 return false;
1664 }
1665 }
1666
1667 private void sendPostBindInitialization(
1668 final boolean waitForDisco, final boolean carbonsEnabled) {
1669 features.carbonsEnabled = carbonsEnabled;
1670 features.blockListRequested = false;
1671 synchronized (this.disco) {
1672 this.disco.clear();
1673 }
1674 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1675 mPendingServiceDiscoveries.set(0);
1676 if (!waitForDisco
1677 || Patches.DISCO_EXCEPTIONS.contains(
1678 account.getJid().getDomain().toEscapedString())) {
1679 Log.d(
1680 Config.LOGTAG,
1681 account.getJid().asBareJid() + ": do not wait for service discovery");
1682 mWaitForDisco.set(false);
1683 } else {
1684 mWaitForDisco.set(true);
1685 }
1686 lastDiscoStarted = SystemClock.elapsedRealtime();
1687 mXmppConnectionService.scheduleWakeUpCall(
1688 Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1689 Element caps = streamFeatures.findChild("c");
1690 final String hash = caps == null ? null : caps.getAttribute("hash");
1691 final String ver = caps == null ? null : caps.getAttribute("ver");
1692 ServiceDiscoveryResult discoveryResult = null;
1693 if (hash != null && ver != null) {
1694 discoveryResult =
1695 mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1696 }
1697 final boolean requestDiscoItemsFirst =
1698 !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1699 if (requestDiscoItemsFirst) {
1700 sendServiceDiscoveryItems(account.getDomain());
1701 }
1702 if (discoveryResult == null) {
1703 sendServiceDiscoveryInfo(account.getDomain());
1704 } else {
1705 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1706 disco.put(account.getDomain(), discoveryResult);
1707 }
1708 discoverMamPreferences();
1709 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1710 if (!requestDiscoItemsFirst) {
1711 sendServiceDiscoveryItems(account.getDomain());
1712 }
1713
1714 if (!mWaitForDisco.get()) {
1715 finalizeBind();
1716 }
1717 this.lastSessionStarted = SystemClock.elapsedRealtime();
1718 }
1719
1720 private void sendServiceDiscoveryInfo(final Jid jid) {
1721 mPendingServiceDiscoveries.incrementAndGet();
1722 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1723 iq.setTo(jid);
1724 iq.query("http://jabber.org/protocol/disco#info");
1725 this.sendIqPacket(
1726 iq,
1727 (account, packet) -> {
1728 if (packet.getType() == IqPacket.TYPE.RESULT) {
1729 boolean advancedStreamFeaturesLoaded;
1730 synchronized (XmppConnection.this.disco) {
1731 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1732 if (jid.equals(account.getDomain())) {
1733 mXmppConnectionService.databaseBackend.insertDiscoveryResult(
1734 result);
1735 }
1736 disco.put(jid, result);
1737 advancedStreamFeaturesLoaded =
1738 disco.containsKey(account.getDomain())
1739 && disco.containsKey(account.getJid().asBareJid());
1740 }
1741 if (advancedStreamFeaturesLoaded
1742 && (jid.equals(account.getDomain())
1743 || jid.equals(account.getJid().asBareJid()))) {
1744 enableAdvancedStreamFeatures();
1745 }
1746 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1747 Log.d(
1748 Config.LOGTAG,
1749 account.getJid().asBareJid()
1750 + ": could not query disco info for "
1751 + jid.toString());
1752 final boolean serverOrAccount =
1753 jid.equals(account.getDomain())
1754 || jid.equals(account.getJid().asBareJid());
1755 final boolean advancedStreamFeaturesLoaded;
1756 if (serverOrAccount) {
1757 synchronized (XmppConnection.this.disco) {
1758 disco.put(jid, ServiceDiscoveryResult.empty());
1759 advancedStreamFeaturesLoaded =
1760 disco.containsKey(account.getDomain())
1761 && disco.containsKey(account.getJid().asBareJid());
1762 }
1763 } else {
1764 advancedStreamFeaturesLoaded = false;
1765 }
1766 if (advancedStreamFeaturesLoaded) {
1767 enableAdvancedStreamFeatures();
1768 }
1769 }
1770 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1771 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1772 && mWaitForDisco.compareAndSet(true, false)) {
1773 finalizeBind();
1774 }
1775 }
1776 });
1777 }
1778
1779 private void discoverMamPreferences() {
1780 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1781 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1782 sendIqPacket(
1783 request,
1784 (account, response) -> {
1785 if (response.getType() == IqPacket.TYPE.RESULT) {
1786 Element prefs =
1787 response.findChild(
1788 "prefs", MessageArchiveService.Version.MAM_2.namespace);
1789 isMamPreferenceAlways =
1790 "always"
1791 .equals(
1792 prefs == null
1793 ? null
1794 : prefs.getAttribute("default"));
1795 }
1796 });
1797 }
1798
1799 private void discoverCommands() {
1800 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1801 request.setTo(account.getDomain());
1802 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1803 sendIqPacket(
1804 request,
1805 (account, response) -> {
1806 if (response.getType() == IqPacket.TYPE.RESULT) {
1807 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1808 if (query == null) {
1809 return;
1810 }
1811 final HashMap<String, Jid> commands = new HashMap<>();
1812 for (final Element child : query.getChildren()) {
1813 if ("item".equals(child.getName())) {
1814 final String node = child.getAttribute("node");
1815 final Jid jid = child.getAttributeAsJid("jid");
1816 if (node != null && jid != null) {
1817 commands.put(node, jid);
1818 }
1819 }
1820 }
1821 Log.d(Config.LOGTAG, commands.toString());
1822 synchronized (this.commands) {
1823 this.commands.clear();
1824 this.commands.putAll(commands);
1825 }
1826 }
1827 });
1828 }
1829
1830 public boolean isMamPreferenceAlways() {
1831 return isMamPreferenceAlways;
1832 }
1833
1834 private void finalizeBind() {
1835 Log.d(
1836 Config.LOGTAG,
1837 account.getJid().asBareJid() + ": online with resource " + account.getResource());
1838 if (bindListener != null) {
1839 bindListener.onBind(account);
1840 }
1841 changeStatus(Account.State.ONLINE);
1842 }
1843
1844 private void enableAdvancedStreamFeatures() {
1845 if (getFeatures().blocking() && !features.blockListRequested) {
1846 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1847 this.sendIqPacket(
1848 getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1849 }
1850 for (final OnAdvancedStreamFeaturesLoaded listener :
1851 advancedStreamFeaturesLoadedListeners) {
1852 listener.onAdvancedStreamFeaturesAvailable(account);
1853 }
1854 if (getFeatures().carbons() && !features.carbonsEnabled) {
1855 sendEnableCarbons();
1856 }
1857 if (getFeatures().commands()) {
1858 discoverCommands();
1859 }
1860 }
1861
1862 private void sendServiceDiscoveryItems(final Jid server) {
1863 mPendingServiceDiscoveries.incrementAndGet();
1864 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1865 iq.setTo(server.getDomain());
1866 iq.query("http://jabber.org/protocol/disco#items");
1867 this.sendIqPacket(
1868 iq,
1869 (account, packet) -> {
1870 if (packet.getType() == IqPacket.TYPE.RESULT) {
1871 final HashSet<Jid> items = new HashSet<>();
1872 final List<Element> elements = packet.query().getChildren();
1873 for (final Element element : elements) {
1874 if (element.getName().equals("item")) {
1875 final Jid jid =
1876 InvalidJid.getNullForInvalid(
1877 element.getAttributeAsJid("jid"));
1878 if (jid != null && !jid.equals(account.getDomain())) {
1879 items.add(jid);
1880 }
1881 }
1882 }
1883 for (Jid jid : items) {
1884 sendServiceDiscoveryInfo(jid);
1885 }
1886 } else {
1887 Log.d(
1888 Config.LOGTAG,
1889 account.getJid().asBareJid()
1890 + ": could not query disco items of "
1891 + server);
1892 }
1893 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1894 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1895 && mWaitForDisco.compareAndSet(true, false)) {
1896 finalizeBind();
1897 }
1898 }
1899 });
1900 }
1901
1902 private void sendEnableCarbons() {
1903 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1904 iq.addChild("enable", Namespace.CARBONS);
1905 this.sendIqPacket(
1906 iq,
1907 (account, packet) -> {
1908 if (packet.getType() == IqPacket.TYPE.RESULT) {
1909 Log.d(
1910 Config.LOGTAG,
1911 account.getJid().asBareJid() + ": successfully enabled carbons");
1912 features.carbonsEnabled = true;
1913 } else {
1914 Log.d(
1915 Config.LOGTAG,
1916 account.getJid().asBareJid()
1917 + ": could not enable carbons "
1918 + packet);
1919 }
1920 });
1921 }
1922
1923 private void processStreamError(final Tag currentTag) throws IOException {
1924 final Element streamError = tagReader.readElement(currentTag);
1925 if (streamError == null) {
1926 return;
1927 }
1928 if (streamError.hasChild("conflict")) {
1929 account.setResource(createNewResource());
1930 Log.d(
1931 Config.LOGTAG,
1932 account.getJid().asBareJid()
1933 + ": switching resource due to conflict ("
1934 + account.getResource()
1935 + ")");
1936 throw new IOException();
1937 } else if (streamError.hasChild("host-unknown")) {
1938 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1939 } else if (streamError.hasChild("policy-violation")) {
1940 this.lastConnect = SystemClock.elapsedRealtime();
1941 final String text = streamError.findChildContent("text");
1942 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1943 failPendingMessages(text);
1944 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1945 } else {
1946 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
1947 throw new StateChangingException(Account.State.STREAM_ERROR);
1948 }
1949 }
1950
1951 private void failPendingMessages(final String error) {
1952 synchronized (this.mStanzaQueue) {
1953 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1954 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1955 if (stanza instanceof MessagePacket) {
1956 final MessagePacket packet = (MessagePacket) stanza;
1957 final String id = packet.getId();
1958 final Jid to = packet.getTo();
1959 mXmppConnectionService.markMessage(
1960 account, to.asBareJid(), id, Message.STATUS_SEND_FAILED, error);
1961 }
1962 }
1963 }
1964 }
1965
1966 private void sendStartStream() throws IOException {
1967 final Tag stream = Tag.start("stream:stream");
1968 stream.setAttribute("to", account.getServer());
1969 stream.setAttribute("version", "1.0");
1970 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1971 stream.setAttribute("xmlns", "jabber:client");
1972 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1973 tagWriter.writeTag(stream);
1974 }
1975
1976 private String createNewResource() {
1977 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1978 }
1979
1980 private String nextRandomId() {
1981 return nextRandomId(false);
1982 }
1983
1984 private String nextRandomId(final boolean s) {
1985 return CryptoHelper.random(s ? 3 : 9);
1986 }
1987
1988 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1989 packet.setFrom(account.getJid());
1990 return this.sendUnmodifiedIqPacket(packet, callback, false);
1991 }
1992
1993 public synchronized String sendUnmodifiedIqPacket(
1994 final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1995 if (packet.getId() == null) {
1996 packet.setAttribute("id", nextRandomId());
1997 }
1998 if (callback != null) {
1999 synchronized (this.packetCallbacks) {
2000 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
2001 }
2002 }
2003 this.sendPacket(packet, force);
2004 return packet.getId();
2005 }
2006
2007 public void sendMessagePacket(final MessagePacket packet) {
2008 this.sendPacket(packet);
2009 }
2010
2011 public void sendPresencePacket(final PresencePacket packet) {
2012 this.sendPacket(packet);
2013 }
2014
2015 private synchronized void sendPacket(final AbstractStanza packet) {
2016 sendPacket(packet, false);
2017 }
2018
2019 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
2020 if (stanzasSent == Integer.MAX_VALUE) {
2021 resetStreamId();
2022 disconnect(true);
2023 return;
2024 }
2025 synchronized (this.mStanzaQueue) {
2026 if (force || isBound) {
2027 tagWriter.writeStanzaAsync(packet);
2028 } else {
2029 Log.d(
2030 Config.LOGTAG,
2031 account.getJid().asBareJid()
2032 + " do not write stanza to unbound stream "
2033 + packet.toString());
2034 }
2035 if (packet instanceof AbstractAcknowledgeableStanza) {
2036 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
2037
2038 if (this.mStanzaQueue.size() != 0) {
2039 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
2040 if (currentHighestKey != stanzasSent) {
2041 throw new AssertionError("Stanza count messed up");
2042 }
2043 }
2044
2045 ++stanzasSent;
2046 this.mStanzaQueue.append(stanzasSent, stanza);
2047 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
2048 if (Config.EXTENDED_SM_LOGGING) {
2049 Log.d(
2050 Config.LOGTAG,
2051 account.getJid().asBareJid()
2052 + ": requesting ack for message stanza #"
2053 + stanzasSent);
2054 }
2055 tagWriter.writeStanzaAsync(new RequestPacket());
2056 }
2057 }
2058 }
2059 }
2060
2061 public void sendPing() {
2062 if (!r()) {
2063 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2064 iq.setFrom(account.getJid());
2065 iq.addChild("ping", Namespace.PING);
2066 this.sendIqPacket(iq, null);
2067 }
2068 this.lastPingSent = SystemClock.elapsedRealtime();
2069 }
2070
2071 public void setOnMessagePacketReceivedListener(final OnMessagePacketReceived listener) {
2072 this.messageListener = listener;
2073 }
2074
2075 public void setOnUnregisteredIqPacketReceivedListener(final OnIqPacketReceived listener) {
2076 this.unregisteredIqListener = listener;
2077 }
2078
2079 public void setOnPresencePacketReceivedListener(final OnPresencePacketReceived listener) {
2080 this.presenceListener = listener;
2081 }
2082
2083 public void setOnJinglePacketReceivedListener(final OnJinglePacketReceived listener) {
2084 this.jingleListener = listener;
2085 }
2086
2087 public void setOnStatusChangedListener(final OnStatusChanged listener) {
2088 this.statusListener = listener;
2089 }
2090
2091 public void setOnBindListener(final OnBindListener listener) {
2092 this.bindListener = listener;
2093 }
2094
2095 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
2096 this.acknowledgedListener = listener;
2097 }
2098
2099 public void addOnAdvancedStreamFeaturesAvailableListener(
2100 final OnAdvancedStreamFeaturesLoaded listener) {
2101 this.advancedStreamFeaturesLoadedListeners.add(listener);
2102 }
2103
2104 private void forceCloseSocket() {
2105 FileBackend.close(this.socket);
2106 FileBackend.close(this.tagReader);
2107 }
2108
2109 public void interrupt() {
2110 if (this.mThread != null) {
2111 this.mThread.interrupt();
2112 }
2113 }
2114
2115 public void disconnect(final boolean force) {
2116 interrupt();
2117 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
2118 if (force) {
2119 forceCloseSocket();
2120 } else {
2121 final TagWriter currentTagWriter = this.tagWriter;
2122 if (currentTagWriter.isActive()) {
2123 currentTagWriter.finish();
2124 final Socket currentSocket = this.socket;
2125 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
2126 try {
2127 currentTagWriter.await(1, TimeUnit.SECONDS);
2128 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
2129 currentTagWriter.writeTag(Tag.end("stream:stream"));
2130 if (streamCountDownLatch != null) {
2131 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
2132 Log.d(
2133 Config.LOGTAG,
2134 account.getJid().asBareJid() + ": remote ended stream");
2135 } else {
2136 Log.d(
2137 Config.LOGTAG,
2138 account.getJid().asBareJid()
2139 + ": remote has not closed socket. force closing");
2140 }
2141 }
2142 } catch (InterruptedException e) {
2143 Log.d(
2144 Config.LOGTAG,
2145 account.getJid().asBareJid()
2146 + ": interrupted while gracefully closing stream");
2147 } catch (final IOException e) {
2148 Log.d(
2149 Config.LOGTAG,
2150 account.getJid().asBareJid()
2151 + ": io exception during disconnect ("
2152 + e.getMessage()
2153 + ")");
2154 } finally {
2155 FileBackend.close(currentSocket);
2156 }
2157 } else {
2158 forceCloseSocket();
2159 }
2160 }
2161 }
2162
2163 private void resetStreamId() {
2164 this.streamId = null;
2165 }
2166
2167 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
2168 synchronized (this.disco) {
2169 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
2170 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
2171 if (cursor.getValue().getFeatures().contains(feature)) {
2172 items.add(cursor);
2173 }
2174 }
2175 return items;
2176 }
2177 }
2178
2179 public Jid findDiscoItemByFeature(final String feature) {
2180 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
2181 if (items.size() >= 1) {
2182 return items.get(0).getKey();
2183 }
2184 return null;
2185 }
2186
2187 public boolean r() {
2188 if (getFeatures().sm()) {
2189 this.tagWriter.writeStanzaAsync(new RequestPacket());
2190 return true;
2191 } else {
2192 return false;
2193 }
2194 }
2195
2196 public List<String> getMucServersWithholdAccount() {
2197 final List<String> servers = getMucServers();
2198 servers.remove(account.getDomain().toEscapedString());
2199 return servers;
2200 }
2201
2202 public List<String> getMucServers() {
2203 List<String> servers = new ArrayList<>();
2204 synchronized (this.disco) {
2205 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
2206 final ServiceDiscoveryResult value = cursor.getValue();
2207 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
2208 && value.hasIdentity("conference", "text")
2209 && !value.getFeatures().contains("jabber:iq:gateway")
2210 && !value.hasIdentity("conference", "irc")) {
2211 servers.add(cursor.getKey().toString());
2212 }
2213 }
2214 }
2215 return servers;
2216 }
2217
2218 public String getMucServer() {
2219 List<String> servers = getMucServers();
2220 return servers.size() > 0 ? servers.get(0) : null;
2221 }
2222
2223 public int getTimeToNextAttempt() {
2224 final int additionalTime =
2225 account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
2226 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
2227 final int secondsSinceLast =
2228 (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
2229 return interval - secondsSinceLast;
2230 }
2231
2232 public int getAttempt() {
2233 return this.attempt;
2234 }
2235
2236 public Features getFeatures() {
2237 return this.features;
2238 }
2239
2240 public long getLastSessionEstablished() {
2241 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
2242 return System.currentTimeMillis() - diff;
2243 }
2244
2245 public long getLastConnect() {
2246 return this.lastConnect;
2247 }
2248
2249 public long getLastPingSent() {
2250 return this.lastPingSent;
2251 }
2252
2253 public long getLastDiscoStarted() {
2254 return this.lastDiscoStarted;
2255 }
2256
2257 public long getLastPacketReceived() {
2258 return this.lastPacketReceived;
2259 }
2260
2261 public void sendActive() {
2262 this.sendPacket(new ActivePacket());
2263 }
2264
2265 public void sendInactive() {
2266 this.sendPacket(new InactivePacket());
2267 }
2268
2269 public void resetAttemptCount(boolean resetConnectTime) {
2270 this.attempt = 0;
2271 if (resetConnectTime) {
2272 this.lastConnect = 0;
2273 }
2274 }
2275
2276 public void setInteractive(boolean interactive) {
2277 this.mInteractive = interactive;
2278 }
2279
2280 public Identity getServerIdentity() {
2281 synchronized (this.disco) {
2282 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
2283 if (result == null) {
2284 return Identity.UNKNOWN;
2285 }
2286 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
2287 if (id.getType().equals("im")
2288 && id.getCategory().equals("server")
2289 && id.getName() != null) {
2290 switch (id.getName()) {
2291 case "Prosody":
2292 return Identity.PROSODY;
2293 case "ejabberd":
2294 return Identity.EJABBERD;
2295 case "Slack-XMPP":
2296 return Identity.SLACK;
2297 }
2298 }
2299 }
2300 }
2301 return Identity.UNKNOWN;
2302 }
2303
2304 private IqGenerator getIqGenerator() {
2305 return mXmppConnectionService.getIqGenerator();
2306 }
2307
2308 public enum Identity {
2309 FACEBOOK,
2310 SLACK,
2311 EJABBERD,
2312 PROSODY,
2313 NIMBUZZ,
2314 UNKNOWN
2315 }
2316
2317 private class MyKeyManager implements X509KeyManager {
2318 @Override
2319 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
2320 return account.getPrivateKeyAlias();
2321 }
2322
2323 @Override
2324 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
2325 return null;
2326 }
2327
2328 @Override
2329 public X509Certificate[] getCertificateChain(String alias) {
2330 Log.d(Config.LOGTAG, "getting certificate chain");
2331 try {
2332 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
2333 } catch (final Exception e) {
2334 Log.d(Config.LOGTAG, "could not get certificate chain", e);
2335 return new X509Certificate[0];
2336 }
2337 }
2338
2339 @Override
2340 public String[] getClientAliases(String s, Principal[] principals) {
2341 final String alias = account.getPrivateKeyAlias();
2342 return alias != null ? new String[] {alias} : new String[0];
2343 }
2344
2345 @Override
2346 public String[] getServerAliases(String s, Principal[] principals) {
2347 return new String[0];
2348 }
2349
2350 @Override
2351 public PrivateKey getPrivateKey(String alias) {
2352 try {
2353 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
2354 } catch (Exception e) {
2355 return null;
2356 }
2357 }
2358 }
2359
2360 private static class StateChangingError extends Error {
2361 private final Account.State state;
2362
2363 public StateChangingError(Account.State state) {
2364 this.state = state;
2365 }
2366 }
2367
2368 private static class StateChangingException extends IOException {
2369 private final Account.State state;
2370
2371 public StateChangingException(Account.State state) {
2372 this.state = state;
2373 }
2374 }
2375
2376 public class Features {
2377 XmppConnection connection;
2378 private boolean carbonsEnabled = false;
2379 private boolean encryptionEnabled = false;
2380 private boolean blockListRequested = false;
2381
2382 public Features(final XmppConnection connection) {
2383 this.connection = connection;
2384 }
2385
2386 private boolean hasDiscoFeature(final Jid server, final String feature) {
2387 synchronized (XmppConnection.this.disco) {
2388 final ServiceDiscoveryResult sdr = connection.disco.get(server);
2389 return sdr != null && sdr.getFeatures().contains(feature);
2390 }
2391 }
2392
2393 public boolean carbons() {
2394 return hasDiscoFeature(account.getDomain(), Namespace.CARBONS);
2395 }
2396
2397 public boolean commands() {
2398 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2399 }
2400
2401 public boolean easyOnboardingInvites() {
2402 synchronized (commands) {
2403 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2404 }
2405 }
2406
2407 public boolean bookmarksConversion() {
2408 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION)
2409 && pepPublishOptions();
2410 }
2411
2412 public boolean avatarConversion() {
2413 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION)
2414 && pepPublishOptions();
2415 }
2416
2417 public boolean blocking() {
2418 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2419 }
2420
2421 public boolean spamReporting() {
2422 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
2423 }
2424
2425 public boolean flexibleOfflineMessageRetrieval() {
2426 return hasDiscoFeature(
2427 account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2428 }
2429
2430 public boolean register() {
2431 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2432 }
2433
2434 public boolean invite() {
2435 return connection.streamFeatures != null
2436 && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2437 }
2438
2439 public boolean sm() {
2440 return streamId != null
2441 || (connection.streamFeatures != null
2442 && connection.streamFeatures.hasChild("sm"));
2443 }
2444
2445 public boolean csi() {
2446 return connection.streamFeatures != null
2447 && connection.streamFeatures.hasChild("csi", Namespace.CSI);
2448 }
2449
2450 public boolean pep() {
2451 synchronized (XmppConnection.this.disco) {
2452 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2453 return info != null && info.hasIdentity("pubsub", "pep");
2454 }
2455 }
2456
2457 public boolean pepPersistent() {
2458 synchronized (XmppConnection.this.disco) {
2459 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2460 return info != null
2461 && info.getFeatures()
2462 .contains("http://jabber.org/protocol/pubsub#persistent-items");
2463 }
2464 }
2465
2466 public boolean pepPublishOptions() {
2467 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2468 }
2469
2470 public boolean pepOmemoWhitelisted() {
2471 return hasDiscoFeature(
2472 account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2473 }
2474
2475 public boolean mam() {
2476 return MessageArchiveService.Version.has(getAccountFeatures());
2477 }
2478
2479 public List<String> getAccountFeatures() {
2480 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2481 return result == null ? Collections.emptyList() : result.getFeatures();
2482 }
2483
2484 public boolean push() {
2485 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2486 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2487 }
2488
2489 public boolean rosterVersioning() {
2490 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2491 }
2492
2493 public void setBlockListRequested(boolean value) {
2494 this.blockListRequested = value;
2495 }
2496
2497 public boolean httpUpload(long filesize) {
2498 if (Config.DISABLE_HTTP_UPLOAD) {
2499 return false;
2500 } else {
2501 for (String namespace :
2502 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2503 List<Entry<Jid, ServiceDiscoveryResult>> items =
2504 findDiscoItemsByFeature(namespace);
2505 if (items.size() > 0) {
2506 try {
2507 long maxsize =
2508 Long.parseLong(
2509 items.get(0)
2510 .getValue()
2511 .getExtendedDiscoInformation(
2512 namespace, "max-file-size"));
2513 if (filesize <= maxsize) {
2514 return true;
2515 } else {
2516 Log.d(
2517 Config.LOGTAG,
2518 account.getJid().asBareJid()
2519 + ": http upload is not available for files with size "
2520 + filesize
2521 + " (max is "
2522 + maxsize
2523 + ")");
2524 return false;
2525 }
2526 } catch (Exception e) {
2527 return true;
2528 }
2529 }
2530 }
2531 return false;
2532 }
2533 }
2534
2535 public boolean useLegacyHttpUpload() {
2536 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null
2537 && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2538 }
2539
2540 public long getMaxHttpUploadSize() {
2541 for (String namespace :
2542 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2543 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2544 if (items.size() > 0) {
2545 try {
2546 return Long.parseLong(
2547 items.get(0)
2548 .getValue()
2549 .getExtendedDiscoInformation(namespace, "max-file-size"));
2550 } catch (Exception e) {
2551 // ignored
2552 }
2553 }
2554 }
2555 return -1;
2556 }
2557
2558 public boolean stanzaIds() {
2559 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2560 }
2561
2562 public boolean bookmarks2() {
2563 return Config
2564 .USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
2565 }
2566
2567 public boolean externalServiceDiscovery() {
2568 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2569 }
2570 }
2571}