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 final SaslMechanism.Version version;
563 try {
564 version = SaslMechanism.Version.of(failure);
565 } catch (final IllegalArgumentException e) {
566 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
567 }
568 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
569 if (failure.hasChild("temporary-auth-failure")) {
570 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
571 } else if (failure.hasChild("account-disabled")) {
572 final String text = failure.findChildContent("text");
573 if (Strings.isNullOrEmpty(text)) {
574 throw new StateChangingException(Account.State.UNAUTHORIZED);
575 }
576 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
577 if (matcher.find()) {
578 final HttpUrl url;
579 try {
580 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
581 } catch (final IllegalArgumentException e) {
582 throw new StateChangingException(Account.State.UNAUTHORIZED);
583 }
584 if (url.isHttps()) {
585 this.redirectionUrl = url;
586 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
587 }
588 }
589 }
590 throw new StateChangingException(Account.State.UNAUTHORIZED);
591 } else if (nextTag.isStart("continue", Namespace.SASL_2)) {
592 throw new StateChangingException(Account.State.INCOMPATIBLE_CLIENT);
593 } else if (nextTag.isStart("challenge")) {
594 final Element challenge = tagReader.readElement(nextTag);
595 final SaslMechanism.Version version;
596 try {
597 version = SaslMechanism.Version.of(challenge);
598 } catch (final IllegalArgumentException e) {
599 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
600 }
601 final Element response;
602 if (version == SaslMechanism.Version.SASL) {
603 response = new Element("response", Namespace.SASL);
604 } else if (version == SaslMechanism.Version.SASL_2) {
605 response = new Element("response", Namespace.SASL_2);
606 } else {
607 throw new AssertionError("Missing implementation for " + version);
608 }
609 try {
610 response.setContent(saslMechanism.getResponse(challenge.getContent(), sslSocketOrNull(socket)));
611 } catch (final SaslMechanism.AuthenticationException e) {
612 // TODO: Send auth abort tag.
613 Log.e(Config.LOGTAG, e.toString());
614 throw new StateChangingException(Account.State.UNAUTHORIZED);
615 }
616 tagWriter.writeElement(response);
617 } else if (nextTag.isStart("enabled", Namespace.STREAM_MANAGEMENT)) {
618 final Element enabled = tagReader.readElement(nextTag);
619 processEnabled(enabled);
620 } else if (nextTag.isStart("resumed")) {
621 final Element resumed = tagReader.readElement(nextTag);
622 processResumed(resumed);
623 } else if (nextTag.isStart("r")) {
624 tagReader.readElement(nextTag);
625 if (Config.EXTENDED_SM_LOGGING) {
626 Log.d(
627 Config.LOGTAG,
628 account.getJid().asBareJid()
629 + ": acknowledging stanza #"
630 + this.stanzasReceived);
631 }
632 final AckPacket ack = new AckPacket(this.stanzasReceived);
633 tagWriter.writeStanzaAsync(ack);
634 } else if (nextTag.isStart("a")) {
635 boolean accountUiNeedsRefresh = false;
636 synchronized (NotificationService.CATCHUP_LOCK) {
637 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
638 final int messageCount = mSmCatchupMessageCounter.get();
639 final int pendingIQs = packetCallbacks.size();
640 Log.d(
641 Config.LOGTAG,
642 account.getJid().asBareJid()
643 + ": SM catchup complete (messages="
644 + messageCount
645 + ", pending IQs="
646 + pendingIQs
647 + ")");
648 accountUiNeedsRefresh = true;
649 if (messageCount > 0) {
650 mXmppConnectionService
651 .getNotificationService()
652 .finishBacklog(true, account);
653 }
654 }
655 }
656 if (accountUiNeedsRefresh) {
657 mXmppConnectionService.updateAccountUi();
658 }
659 final Element ack = tagReader.readElement(nextTag);
660 lastPacketReceived = SystemClock.elapsedRealtime();
661 try {
662 final boolean acknowledgedMessages;
663 synchronized (this.mStanzaQueue) {
664 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
665 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
666 }
667 if (acknowledgedMessages) {
668 mXmppConnectionService.updateConversationUi();
669 }
670 } catch (NumberFormatException | NullPointerException e) {
671 Log.d(
672 Config.LOGTAG,
673 account.getJid().asBareJid()
674 + ": server send ack without sequence number");
675 }
676 } else if (nextTag.isStart("failed")) {
677 final Element failed = tagReader.readElement(nextTag);
678 processFailed(failed, true);
679 } else if (nextTag.isStart("iq")) {
680 processIq(nextTag);
681 } else if (nextTag.isStart("message")) {
682 processMessage(nextTag);
683 } else if (nextTag.isStart("presence")) {
684 processPresence(nextTag);
685 }
686 nextTag = tagReader.readTag();
687 }
688 if (nextTag != null && nextTag.isEnd("stream")) {
689 streamCountDownLatch.countDown();
690 }
691 }
692
693 private boolean processSuccess(final Element success)
694 throws IOException, XmlPullParserException {
695 final SaslMechanism.Version version;
696 try {
697 version = SaslMechanism.Version.of(success);
698 } catch (final IllegalArgumentException e) {
699 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
700 }
701 final String challenge;
702 if (version == SaslMechanism.Version.SASL) {
703 challenge = success.getContent();
704 } else if (version == SaslMechanism.Version.SASL_2) {
705 challenge = success.findChildContent("additional-data");
706 } else {
707 throw new AssertionError("Missing implementation for " + version);
708 }
709 try {
710 saslMechanism.getResponse(challenge, sslSocketOrNull(socket));
711 } catch (final SaslMechanism.AuthenticationException e) {
712 Log.e(Config.LOGTAG, String.valueOf(e));
713 throw new StateChangingException(Account.State.UNAUTHORIZED);
714 }
715 Log.d(
716 Config.LOGTAG,
717 account.getJid().asBareJid().toString() + ": logged in (using " + version + ")");
718 // TODO store mechanism name
719 account.setKey(Account.PINNED_MECHANISM_KEY, String.valueOf(saslMechanism.getPriority()));
720 if (version == SaslMechanism.Version.SASL_2) {
721 final String authorizationIdentifier =
722 success.findChildContent("authorization-identifier");
723 final Jid authorizationJid;
724 try {
725 authorizationJid =
726 Strings.isNullOrEmpty(authorizationIdentifier)
727 ? null
728 : Jid.ofEscaped(authorizationIdentifier);
729 } catch (final IllegalArgumentException e) {
730 Log.d(
731 Config.LOGTAG,
732 account.getJid().asBareJid()
733 + ": SASL 2.0 authorization identifier was not a valid jid");
734 throw new StateChangingException(Account.State.BIND_FAILURE);
735 }
736 if (authorizationJid == null) {
737 throw new StateChangingException(Account.State.BIND_FAILURE);
738 }
739 Log.d(
740 Config.LOGTAG,
741 account.getJid().asBareJid()
742 + ": SASL 2.0 authorization identifier was "
743 + authorizationJid);
744 if (!account.getJid().getDomain().equals(authorizationJid.getDomain())) {
745 Log.d(
746 Config.LOGTAG,
747 account.getJid().asBareJid()
748 + ": server tried to re-assign domain to "
749 + authorizationJid.getDomain());
750 throw new StateChangingError(Account.State.BIND_FAILURE);
751 }
752 if (authorizationJid.isFullJid() && account.setJid(authorizationJid)) {
753 Log.d(
754 Config.LOGTAG,
755 account.getJid().asBareJid()
756 + ": jid changed during SASL 2.0. updating database");
757 mXmppConnectionService.databaseBackend.updateAccount(account);
758 }
759 final Element bound = success.findChild("bound", Namespace.BIND2);
760 final Element resumed = success.findChild("resumed", "urn:xmpp:sm:3");
761 final Element failed = success.findChild("failed", "urn:xmpp:sm:3");
762 // TODO check if resumed and bound exist and throw bind failure
763 if (resumed != null && streamId != null) {
764 processResumed(resumed);
765 } else if (failed != null) {
766 processFailed(failed, false); // wait for new stream features
767 }
768 if (bound != null) {
769 this.isBound = true;
770 final Element streamManagementEnabled =
771 bound.findChild("enabled", Namespace.STREAM_MANAGEMENT);
772 final Element carbonsEnabled = bound.findChild("enabled", Namespace.CARBONS);
773 if (streamManagementEnabled != null) {
774 processEnabled(streamManagementEnabled);
775 }
776 if (carbonsEnabled != null) {
777 Log.d(
778 Config.LOGTAG,
779 account.getJid().asBareJid() + ": successfully enabled carbons");
780 features.carbonsEnabled = true;
781 }
782 // TODO if both are set mark account ready for pipelining
783 sendPostBindInitialization(streamManagementEnabled != null, carbonsEnabled != null);
784 }
785 }
786 if (version == SaslMechanism.Version.SASL) {
787 tagReader.reset();
788 sendStartStream();
789 final Tag tag = tagReader.readTag();
790 if (tag != null && tag.isStart("stream")) {
791 processStream();
792 return true;
793 } else {
794 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
795 }
796 } else {
797 return false;
798 }
799 }
800
801 private static SSLSocket sslSocketOrNull(final Socket socket) {
802 if (socket instanceof SSLSocket) {
803 return (SSLSocket) socket;
804 } else {
805 return null;
806 }
807 }
808
809 private void processEnabled(final Element enabled) {
810 final String streamId;
811 if (enabled.getAttributeAsBoolean("resume")) {
812 streamId = enabled.getAttribute("id");
813 Log.d(
814 Config.LOGTAG,
815 account.getJid().asBareJid().toString()
816 + ": stream management enabled (resumable)");
817 } else {
818 Log.d(
819 Config.LOGTAG,
820 account.getJid().asBareJid().toString() + ": stream management enabled");
821 streamId = null;
822 }
823 this.streamId = streamId;
824 this.stanzasReceived = 0;
825 this.inSmacksSession = true;
826 final RequestPacket r = new RequestPacket();
827 tagWriter.writeStanzaAsync(r);
828 }
829
830 private void processResumed(final Element resumed) throws StateChangingException {
831 this.inSmacksSession = true;
832 this.isBound = true;
833 this.tagWriter.writeStanzaAsync(new RequestPacket());
834 lastPacketReceived = SystemClock.elapsedRealtime();
835 final String h = resumed.getAttribute("h");
836 if (h == null) {
837 resetStreamId();
838 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
839 }
840 final int serverCount;
841 try {
842 serverCount = Integer.parseInt(h);
843 } catch (final NumberFormatException e) {
844 resetStreamId();
845 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
846 }
847 final ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
848 final boolean acknowledgedMessages;
849 synchronized (this.mStanzaQueue) {
850 if (serverCount < stanzasSent) {
851 Log.d(
852 Config.LOGTAG,
853 account.getJid().asBareJid() + ": session resumed with lost packages");
854 stanzasSent = serverCount;
855 } else {
856 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": session resumed");
857 }
858 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
859 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
860 failedStanzas.add(mStanzaQueue.valueAt(i));
861 }
862 mStanzaQueue.clear();
863 }
864 if (acknowledgedMessages) {
865 mXmppConnectionService.updateConversationUi();
866 }
867 Log.d(
868 Config.LOGTAG,
869 account.getJid().asBareJid() + ": resending " + failedStanzas.size() + " stanzas");
870 for (final AbstractAcknowledgeableStanza packet : failedStanzas) {
871 if (packet instanceof MessagePacket) {
872 MessagePacket message = (MessagePacket) packet;
873 mXmppConnectionService.markMessage(
874 account,
875 message.getTo().asBareJid(),
876 message.getId(),
877 Message.STATUS_UNSEND);
878 }
879 sendPacket(packet);
880 }
881 Log.d(
882 Config.LOGTAG,
883 account.getJid().asBareJid() + ": online with resource " + account.getResource());
884 changeStatus(Account.State.ONLINE);
885 }
886
887 private void processFailed(final Element failed, final boolean sendBindRequest) {
888 final int serverCount;
889 try {
890 serverCount = Integer.parseInt(failed.getAttribute("h"));
891 } catch (final NumberFormatException | NullPointerException e) {
892 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
893 resetStreamId();
894 if (sendBindRequest) {
895 sendBindRequest();
896 }
897 return;
898 }
899 Log.d(
900 Config.LOGTAG,
901 account.getJid().asBareJid()
902 + ": resumption failed but server acknowledged stanza #"
903 + serverCount);
904 final boolean acknowledgedMessages;
905 synchronized (this.mStanzaQueue) {
906 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
907 }
908 if (acknowledgedMessages) {
909 mXmppConnectionService.updateConversationUi();
910 }
911 resetStreamId();
912 if (sendBindRequest) {
913 sendBindRequest();
914 }
915 }
916
917 private boolean acknowledgeStanzaUpTo(int serverCount) {
918 if (serverCount > stanzasSent) {
919 Log.e(
920 Config.LOGTAG,
921 "server acknowledged more stanzas than we sent. serverCount="
922 + serverCount
923 + ", ourCount="
924 + stanzasSent);
925 }
926 boolean acknowledgedMessages = false;
927 for (int i = 0; i < mStanzaQueue.size(); ++i) {
928 if (serverCount >= mStanzaQueue.keyAt(i)) {
929 if (Config.EXTENDED_SM_LOGGING) {
930 Log.d(
931 Config.LOGTAG,
932 account.getJid().asBareJid()
933 + ": server acknowledged stanza #"
934 + mStanzaQueue.keyAt(i));
935 }
936 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
937 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
938 final MessagePacket packet = (MessagePacket) stanza;
939 final String id = packet.getId();
940 final Jid to = packet.getTo();
941 if (id != null && to != null) {
942 acknowledgedMessages |=
943 acknowledgedListener.onMessageAcknowledged(account, to, id);
944 }
945 }
946 mStanzaQueue.removeAt(i);
947 i--;
948 }
949 }
950 return acknowledgedMessages;
951 }
952
953 private @NonNull Element processPacket(final Tag currentTag, final int packetType)
954 throws IOException {
955 final Element element;
956 switch (packetType) {
957 case PACKET_IQ:
958 element = new IqPacket();
959 break;
960 case PACKET_MESSAGE:
961 element = new MessagePacket();
962 break;
963 case PACKET_PRESENCE:
964 element = new PresencePacket();
965 break;
966 default:
967 throw new AssertionError("Should never encounter invalid type");
968 }
969 element.setAttributes(currentTag.getAttributes());
970 Tag nextTag = tagReader.readTag();
971 if (nextTag == null) {
972 throw new IOException("interrupted mid tag");
973 }
974 while (!nextTag.isEnd(element.getName())) {
975 if (!nextTag.isNo()) {
976 element.addChild(tagReader.readElement(nextTag));
977 }
978 nextTag = tagReader.readTag();
979 if (nextTag == null) {
980 throw new IOException("interrupted mid tag");
981 }
982 }
983 if (stanzasReceived == Integer.MAX_VALUE) {
984 resetStreamId();
985 throw new IOException("time to restart the session. cant handle >2 billion pcks");
986 }
987 if (inSmacksSession) {
988 ++stanzasReceived;
989 } else if (features.sm()) {
990 Log.d(
991 Config.LOGTAG,
992 account.getJid().asBareJid()
993 + ": not counting stanza("
994 + element.getClass().getSimpleName()
995 + "). Not in smacks session.");
996 }
997 lastPacketReceived = SystemClock.elapsedRealtime();
998 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
999 Log.d(Config.LOGTAG, "[background stanza] " + element);
1000 }
1001 if (element instanceof IqPacket
1002 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
1003 && element.hasChild("jingle", Namespace.JINGLE)) {
1004 return JinglePacket.upgrade((IqPacket) element);
1005 } else {
1006 return element;
1007 }
1008 }
1009
1010 private void processIq(final Tag currentTag) throws IOException {
1011 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
1012 if (!packet.valid()) {
1013 Log.e(
1014 Config.LOGTAG,
1015 "encountered invalid iq from='"
1016 + packet.getFrom()
1017 + "' to='"
1018 + packet.getTo()
1019 + "'");
1020 return;
1021 }
1022 if (packet instanceof JinglePacket) {
1023 if (this.jingleListener != null) {
1024 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
1025 }
1026 } else {
1027 OnIqPacketReceived callback = null;
1028 synchronized (this.packetCallbacks) {
1029 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple =
1030 packetCallbacks.get(packet.getId());
1031 if (packetCallbackDuple != null) {
1032 // Packets to the server should have responses from the server
1033 if (packetCallbackDuple.first.toServer(account)) {
1034 if (packet.fromServer(account)) {
1035 callback = packetCallbackDuple.second;
1036 packetCallbacks.remove(packet.getId());
1037 } else {
1038 Log.e(
1039 Config.LOGTAG,
1040 account.getJid().asBareJid().toString()
1041 + ": ignoring spoofed iq packet");
1042 }
1043 } else {
1044 if (packet.getFrom() != null
1045 && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
1046 callback = packetCallbackDuple.second;
1047 packetCallbacks.remove(packet.getId());
1048 } else {
1049 Log.e(
1050 Config.LOGTAG,
1051 account.getJid().asBareJid().toString()
1052 + ": ignoring spoofed iq packet");
1053 }
1054 }
1055 } else if (packet.getType() == IqPacket.TYPE.GET
1056 || packet.getType() == IqPacket.TYPE.SET) {
1057 callback = this.unregisteredIqListener;
1058 }
1059 }
1060 if (callback != null) {
1061 try {
1062 callback.onIqPacketReceived(account, packet);
1063 } catch (StateChangingError error) {
1064 throw new StateChangingException(error.state);
1065 }
1066 }
1067 }
1068 }
1069
1070 private void processMessage(final Tag currentTag) throws IOException {
1071 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
1072 if (!packet.valid()) {
1073 Log.e(
1074 Config.LOGTAG,
1075 "encountered invalid message from='"
1076 + packet.getFrom()
1077 + "' to='"
1078 + packet.getTo()
1079 + "'");
1080 return;
1081 }
1082 this.messageListener.onMessagePacketReceived(account, packet);
1083 }
1084
1085 private void processPresence(final Tag currentTag) throws IOException {
1086 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
1087 if (!packet.valid()) {
1088 Log.e(
1089 Config.LOGTAG,
1090 "encountered invalid presence from='"
1091 + packet.getFrom()
1092 + "' to='"
1093 + packet.getTo()
1094 + "'");
1095 return;
1096 }
1097 this.presenceListener.onPresencePacketReceived(account, packet);
1098 }
1099
1100 private void sendStartTLS() throws IOException {
1101 final Tag startTLS = Tag.empty("starttls");
1102 startTLS.setAttribute("xmlns", Namespace.TLS);
1103 tagWriter.writeTag(startTLS);
1104 }
1105
1106 private void switchOverToTls() throws XmlPullParserException, IOException {
1107 tagReader.readTag();
1108 final Socket socket = this.socket;
1109 final SSLSocket sslSocket = upgradeSocketToTls(socket);
1110 tagReader.setInputStream(sslSocket.getInputStream());
1111 tagWriter.setOutputStream(sslSocket.getOutputStream());
1112 sendStartStream();
1113 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
1114 features.encryptionEnabled = true;
1115 final Tag tag = tagReader.readTag();
1116 if (tag != null && tag.isStart("stream")) {
1117 SSLSocketHelper.log(account, sslSocket);
1118 processStream();
1119 } else {
1120 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
1121 }
1122 sslSocket.close();
1123 }
1124
1125 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
1126 final SSLSocketFactory sslSocketFactory;
1127 try {
1128 sslSocketFactory = getSSLSocketFactory();
1129 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
1130 throw new StateChangingException(Account.State.TLS_ERROR);
1131 }
1132 final InetAddress address = socket.getInetAddress();
1133 final SSLSocket sslSocket =
1134 (SSLSocket)
1135 sslSocketFactory.createSocket(
1136 socket, address.getHostAddress(), socket.getPort(), true);
1137 SSLSocketHelper.setSecurity(sslSocket);
1138 SSLSocketHelper.setHostname(sslSocket, IDN.toASCII(account.getServer()));
1139 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
1140 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
1141 try {
1142 if (!xmppDomainVerifier.verify(
1143 account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
1144 Log.d(
1145 Config.LOGTAG,
1146 account.getJid().asBareJid()
1147 + ": TLS certificate domain verification failed");
1148 FileBackend.close(sslSocket);
1149 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
1150 }
1151 } catch (final SSLPeerUnverifiedException e) {
1152 FileBackend.close(sslSocket);
1153 throw new StateChangingException(Account.State.TLS_ERROR);
1154 }
1155 return sslSocket;
1156 }
1157
1158 private void processStreamFeatures(final Tag currentTag) throws IOException {
1159 this.streamFeatures = tagReader.readElement(currentTag);
1160 final boolean isSecure =
1161 features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
1162 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
1163 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
1164 && !features.encryptionEnabled) {
1165 sendStartTLS();
1166 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1167 && account.isOptionSet(Account.OPTION_REGISTER)) {
1168 if (isSecure) {
1169 register();
1170 } else {
1171 Log.d(
1172 Config.LOGTAG,
1173 account.getJid().asBareJid()
1174 + ": unable to find STARTTLS for registration process "
1175 + XmlHelper.printElementNames(this.streamFeatures));
1176 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1177 }
1178 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1179 && account.isOptionSet(Account.OPTION_REGISTER)) {
1180 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
1181 } else if (Config.SASL_2_ENABLED
1182 && this.streamFeatures.hasChild("mechanisms", Namespace.SASL_2)
1183 && shouldAuthenticate
1184 && isSecure) {
1185 authenticate(SaslMechanism.Version.SASL_2);
1186 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
1187 && shouldAuthenticate
1188 && isSecure) {
1189 authenticate(SaslMechanism.Version.SASL);
1190 } else if (this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT)
1191 && streamId != null
1192 && !inSmacksSession) {
1193 if (Config.EXTENDED_SM_LOGGING) {
1194 Log.d(
1195 Config.LOGTAG,
1196 account.getJid().asBareJid()
1197 + ": resuming after stanza #"
1198 + stanzasReceived);
1199 }
1200 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived);
1201 this.mSmCatchupMessageCounter.set(0);
1202 this.mWaitingForSmCatchup.set(true);
1203 this.tagWriter.writeStanzaAsync(resume);
1204 } else if (needsBinding) {
1205 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
1206 sendBindRequest();
1207 } else {
1208 Log.d(
1209 Config.LOGTAG,
1210 account.getJid().asBareJid()
1211 + ": unable to find bind feature "
1212 + XmlHelper.printElementNames(this.streamFeatures));
1213 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1214 }
1215 } else {
1216 Log.d(
1217 Config.LOGTAG,
1218 account.getJid().asBareJid()
1219 + ": received NOP stream features "
1220 + XmlHelper.printElementNames(this.streamFeatures));
1221 }
1222 }
1223
1224 private void authenticate(final SaslMechanism.Version version) throws IOException {
1225 final Element element =
1226 this.streamFeatures.findChild("mechanisms", SaslMechanism.namespace(version));
1227 final Collection<String> mechanisms =
1228 Collections2.transform(
1229 Collections2.filter(
1230 element.getChildren(),
1231 c -> c != null && "mechanism".equals(c.getName())),
1232 c -> c == null ? null : c.getContent());
1233 final Element cbElement =
1234 this.streamFeatures.findChild("sasl-channel-binding", Namespace.CHANNEL_BINDING);
1235 final Collection<ChannelBinding> channelBindings =
1236 Collections2.filter(
1237 Collections2.transform(
1238 Collections2.filter(
1239 cbElement == null
1240 ? Collections.emptyList()
1241 : cbElement.getChildren(),
1242 c -> c != null && "channel-binding".equals(c.getName())),
1243 c -> c == null ? null : ChannelBinding.of(c.getAttribute("type"))),
1244 Predicates.notNull());
1245 Log.d(Config.LOGTAG,"mechanisms: "+mechanisms);
1246 Log.d(Config.LOGTAG, "channel bindings: " + channelBindings);
1247 final SaslMechanism.Factory factory = new SaslMechanism.Factory(account);
1248 this.saslMechanism = factory.of(mechanisms, channelBindings);
1249
1250 if (saslMechanism == null) {
1251 Log.d(
1252 Config.LOGTAG,
1253 account.getJid().asBareJid()
1254 + ": unable to find supported SASL mechanism in "
1255 + mechanisms);
1256 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1257 }
1258 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
1259 if (pinnedMechanism > saslMechanism.getPriority()) {
1260 Log.e(
1261 Config.LOGTAG,
1262 "Auth failed. Authentication mechanism "
1263 + saslMechanism.getMechanism()
1264 + " has lower priority ("
1265 + saslMechanism.getPriority()
1266 + ") than pinned priority ("
1267 + pinnedMechanism
1268 + "). Possible downgrade attack?");
1269 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1270 }
1271 final String firstMessage = saslMechanism.getClientFirstMessage();
1272 final Element authenticate;
1273 if (version == SaslMechanism.Version.SASL) {
1274 authenticate = new Element("auth", Namespace.SASL);
1275 if (!Strings.isNullOrEmpty(firstMessage)) {
1276 authenticate.setContent(firstMessage);
1277 }
1278 } else if (version == SaslMechanism.Version.SASL_2) {
1279 authenticate = new Element("authenticate", Namespace.SASL_2);
1280 if (!Strings.isNullOrEmpty(firstMessage)) {
1281 authenticate.addChild("initial-response").setContent(firstMessage);
1282 }
1283 final Element inline = this.streamFeatures.findChild("inline", Namespace.SASL_2);
1284 final boolean inlineStreamManagement =
1285 inline != null && inline.hasChild("sm", "urn:xmpp:sm:3");
1286 final boolean inlineBind2 = inline != null && inline.hasChild("bind", Namespace.BIND2);
1287 final Element inlineBindFeatures =
1288 this.streamFeatures.findChild("inline", Namespace.BIND2);
1289 if (inlineBind2 && inlineBindFeatures != null) {
1290 final Element bind =
1291 generateBindRequest(
1292 Collections2.transform(
1293 inlineBindFeatures.getChildren(),
1294 c -> c == null ? null : c.getAttribute("var")));
1295 authenticate.addChild(bind);
1296 }
1297 if (inlineStreamManagement && streamId != null) {
1298 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived);
1299 this.mSmCatchupMessageCounter.set(0);
1300 this.mWaitingForSmCatchup.set(true);
1301 authenticate.addChild(resume);
1302 }
1303 } else {
1304 throw new AssertionError("Missing implementation for " + version);
1305 }
1306
1307 Log.d(
1308 Config.LOGTAG,
1309 account.getJid().toString()
1310 + ": Authenticating with "
1311 + version
1312 + "/"
1313 + saslMechanism.getMechanism());
1314 authenticate.setAttribute("mechanism", saslMechanism.getMechanism());
1315 tagWriter.writeElement(authenticate);
1316 }
1317
1318 private Element generateBindRequest(final Collection<String> bindFeatures) {
1319 Log.d(Config.LOGTAG, "inline bind features: " + bindFeatures);
1320 final Element bind = new Element("bind", Namespace.BIND2);
1321 final Element clientId = bind.addChild("client-id");
1322 clientId.setAttribute("tag", mXmppConnectionService.getString(R.string.app_name));
1323 clientId.setContent(account.getUuid());
1324 final Element features = bind.addChild("features");
1325 if (bindFeatures.contains(Namespace.CARBONS)) {
1326 features.addChild("enable", Namespace.CARBONS);
1327 }
1328 if (bindFeatures.contains(Namespace.STREAM_MANAGEMENT)) {
1329 features.addChild(new EnablePacket());
1330 }
1331 return bind;
1332 }
1333
1334 private static Collection<String> extractMechanisms(final Element stream) {
1335 return Collections2.transform(stream.getChildren(), c -> c == null ? null : c.getContent());
1336 }
1337
1338 private void register() {
1339 final String preAuth = account.getKey(Account.PRE_AUTH_REGISTRATION_TOKEN);
1340 if (preAuth != null && features.invite()) {
1341 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1342 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1343 sendUnmodifiedIqPacket(
1344 preAuthRequest,
1345 (account, response) -> {
1346 if (response.getType() == IqPacket.TYPE.RESULT) {
1347 sendRegistryRequest();
1348 } else {
1349 final String error = response.getErrorCondition();
1350 Log.d(
1351 Config.LOGTAG,
1352 account.getJid().asBareJid()
1353 + ": failed to pre auth. "
1354 + error);
1355 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1356 }
1357 },
1358 true);
1359 } else {
1360 sendRegistryRequest();
1361 }
1362 }
1363
1364 private void sendRegistryRequest() {
1365 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1366 register.query(Namespace.REGISTER);
1367 register.setTo(account.getDomain());
1368 sendUnmodifiedIqPacket(
1369 register,
1370 (account, packet) -> {
1371 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1372 return;
1373 }
1374 if (packet.getType() == IqPacket.TYPE.ERROR) {
1375 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1376 }
1377 final Element query = packet.query(Namespace.REGISTER);
1378 if (query.hasChild("username") && (query.hasChild("password"))) {
1379 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1380 final Element username =
1381 new Element("username").setContent(account.getUsername());
1382 final Element password =
1383 new Element("password").setContent(account.getPassword());
1384 register1.query(Namespace.REGISTER).addChild(username);
1385 register1.query().addChild(password);
1386 register1.setFrom(account.getJid().asBareJid());
1387 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1388 } else if (query.hasChild("x", Namespace.DATA)) {
1389 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1390 final Element blob = query.findChild("data", "urn:xmpp:bob");
1391 final String id = packet.getId();
1392 InputStream is;
1393 if (blob != null) {
1394 try {
1395 final String base64Blob = blob.getContent();
1396 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1397 is = new ByteArrayInputStream(strBlob);
1398 } catch (Exception e) {
1399 is = null;
1400 }
1401 } else {
1402 final boolean useTor =
1403 mXmppConnectionService.useTorToConnect() || account.isOnion();
1404 try {
1405 final String url = data.getValue("url");
1406 final String fallbackUrl = data.getValue("captcha-fallback-url");
1407 if (url != null) {
1408 is = HttpConnectionManager.open(url, useTor);
1409 } else if (fallbackUrl != null) {
1410 is = HttpConnectionManager.open(fallbackUrl, useTor);
1411 } else {
1412 is = null;
1413 }
1414 } catch (final IOException e) {
1415 Log.d(
1416 Config.LOGTAG,
1417 account.getJid().asBareJid() + ": unable to fetch captcha",
1418 e);
1419 is = null;
1420 }
1421 }
1422
1423 if (is != null) {
1424 Bitmap captcha = BitmapFactory.decodeStream(is);
1425 try {
1426 if (mXmppConnectionService.displayCaptchaRequest(
1427 account, id, data, captcha)) {
1428 return;
1429 }
1430 } catch (Exception e) {
1431 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1432 }
1433 }
1434 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1435 } else if (query.hasChild("instructions")
1436 || query.hasChild("x", Namespace.OOB)) {
1437 final String instructions = query.findChildContent("instructions");
1438 final Element oob = query.findChild("x", Namespace.OOB);
1439 final String url = oob == null ? null : oob.findChildContent("url");
1440 if (url != null) {
1441 setAccountCreationFailed(url);
1442 } else if (instructions != null) {
1443 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1444 if (matcher.find()) {
1445 setAccountCreationFailed(
1446 instructions.substring(matcher.start(), matcher.end()));
1447 }
1448 }
1449 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1450 }
1451 },
1452 true);
1453 }
1454
1455 private void setAccountCreationFailed(final String url) {
1456 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1457 if (httpUrl != null && httpUrl.isHttps()) {
1458 this.redirectionUrl = httpUrl;
1459 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1460 }
1461 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1462 }
1463
1464 public HttpUrl getRedirectionUrl() {
1465 return this.redirectionUrl;
1466 }
1467
1468 public void resetEverything() {
1469 resetAttemptCount(true);
1470 resetStreamId();
1471 clearIqCallbacks();
1472 this.stanzasSent = 0;
1473 mStanzaQueue.clear();
1474 this.redirectionUrl = null;
1475 synchronized (this.disco) {
1476 disco.clear();
1477 }
1478 synchronized (this.commands) {
1479 this.commands.clear();
1480 }
1481 }
1482
1483 private void sendBindRequest() {
1484 try {
1485 mXmppConnectionService.restoredFromDatabaseLatch.await();
1486 } catch (InterruptedException e) {
1487 Log.d(
1488 Config.LOGTAG,
1489 account.getJid().asBareJid()
1490 + ": interrupted while waiting for DB restore during bind");
1491 return;
1492 }
1493 clearIqCallbacks();
1494 if (account.getJid().isBareJid()) {
1495 account.setResource(this.createNewResource());
1496 } else {
1497 fixResource(mXmppConnectionService, account);
1498 }
1499 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1500 final String resource =
1501 Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1502 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1503 this.sendUnmodifiedIqPacket(
1504 iq,
1505 (account, packet) -> {
1506 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1507 return;
1508 }
1509 final Element bind = packet.findChild("bind");
1510 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1511 isBound = true;
1512 final Element jid = bind.findChild("jid");
1513 if (jid != null && jid.getContent() != null) {
1514 try {
1515 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1516 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1517 Log.d(
1518 Config.LOGTAG,
1519 account.getJid().asBareJid()
1520 + ": server tried to re-assign domain to "
1521 + assignedJid.getDomain());
1522 throw new StateChangingError(Account.State.BIND_FAILURE);
1523 }
1524 if (account.setJid(assignedJid)) {
1525 Log.d(
1526 Config.LOGTAG,
1527 account.getJid().asBareJid()
1528 + ": jid changed during bind. updating database");
1529 mXmppConnectionService.databaseBackend.updateAccount(account);
1530 }
1531 if (streamFeatures.hasChild("session")
1532 && !streamFeatures
1533 .findChild("session")
1534 .hasChild("optional")) {
1535 sendStartSession();
1536 } else {
1537 final boolean waitForDisco = enableStreamManagement();
1538 sendPostBindInitialization(waitForDisco, false);
1539 }
1540 return;
1541 } catch (final IllegalArgumentException e) {
1542 Log.d(
1543 Config.LOGTAG,
1544 account.getJid().asBareJid()
1545 + ": server reported invalid jid ("
1546 + jid.getContent()
1547 + ") on bind");
1548 }
1549 } else {
1550 Log.d(
1551 Config.LOGTAG,
1552 account.getJid()
1553 + ": disconnecting because of bind failure. (no jid)");
1554 }
1555 } else {
1556 Log.d(
1557 Config.LOGTAG,
1558 account.getJid()
1559 + ": disconnecting because of bind failure ("
1560 + packet);
1561 }
1562 final Element error = packet.findChild("error");
1563 if (packet.getType() == IqPacket.TYPE.ERROR
1564 && error != null
1565 && error.hasChild("conflict")) {
1566 account.setResource(createNewResource());
1567 }
1568 throw new StateChangingError(Account.State.BIND_FAILURE);
1569 },
1570 true);
1571 }
1572
1573 private void clearIqCallbacks() {
1574 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1575 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1576 synchronized (this.packetCallbacks) {
1577 if (this.packetCallbacks.size() == 0) {
1578 return;
1579 }
1580 Log.d(
1581 Config.LOGTAG,
1582 account.getJid().asBareJid()
1583 + ": clearing "
1584 + this.packetCallbacks.size()
1585 + " iq callbacks");
1586 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator =
1587 this.packetCallbacks.values().iterator();
1588 while (iterator.hasNext()) {
1589 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1590 callbacks.add(entry.second);
1591 iterator.remove();
1592 }
1593 }
1594 for (OnIqPacketReceived callback : callbacks) {
1595 try {
1596 callback.onIqPacketReceived(account, failurePacket);
1597 } catch (StateChangingError error) {
1598 Log.d(
1599 Config.LOGTAG,
1600 account.getJid().asBareJid()
1601 + ": caught StateChangingError("
1602 + error.state.toString()
1603 + ") while clearing callbacks");
1604 // ignore
1605 }
1606 }
1607 Log.d(
1608 Config.LOGTAG,
1609 account.getJid().asBareJid()
1610 + ": done clearing iq callbacks. "
1611 + this.packetCallbacks.size()
1612 + " left");
1613 }
1614
1615 public void sendDiscoTimeout() {
1616 if (mWaitForDisco.compareAndSet(true, false)) {
1617 Log.d(
1618 Config.LOGTAG,
1619 account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1620 finalizeBind();
1621 }
1622 }
1623
1624 private void sendStartSession() {
1625 Log.d(
1626 Config.LOGTAG,
1627 account.getJid().asBareJid() + ": sending legacy session to outdated server");
1628 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1629 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1630 this.sendUnmodifiedIqPacket(
1631 startSession,
1632 (account, packet) -> {
1633 if (packet.getType() == IqPacket.TYPE.RESULT) {
1634 final boolean waitForDisco = enableStreamManagement();
1635 sendPostBindInitialization(waitForDisco, false);
1636 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1637 throw new StateChangingError(Account.State.SESSION_FAILURE);
1638 }
1639 },
1640 true);
1641 }
1642
1643 private boolean enableStreamManagement() {
1644 final boolean streamManagement =
1645 this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1646 if (streamManagement) {
1647 synchronized (this.mStanzaQueue) {
1648 final EnablePacket enable = new EnablePacket();
1649 tagWriter.writeStanzaAsync(enable);
1650 stanzasSent = 0;
1651 mStanzaQueue.clear();
1652 }
1653 return true;
1654 } else {
1655 return false;
1656 }
1657 }
1658
1659 private void sendPostBindInitialization(
1660 final boolean waitForDisco, final boolean carbonsEnabled) {
1661 features.carbonsEnabled = carbonsEnabled;
1662 features.blockListRequested = false;
1663 synchronized (this.disco) {
1664 this.disco.clear();
1665 }
1666 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1667 mPendingServiceDiscoveries.set(0);
1668 if (!waitForDisco
1669 || Patches.DISCO_EXCEPTIONS.contains(
1670 account.getJid().getDomain().toEscapedString())) {
1671 Log.d(
1672 Config.LOGTAG,
1673 account.getJid().asBareJid() + ": do not wait for service discovery");
1674 mWaitForDisco.set(false);
1675 } else {
1676 mWaitForDisco.set(true);
1677 }
1678 lastDiscoStarted = SystemClock.elapsedRealtime();
1679 mXmppConnectionService.scheduleWakeUpCall(
1680 Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1681 Element caps = streamFeatures.findChild("c");
1682 final String hash = caps == null ? null : caps.getAttribute("hash");
1683 final String ver = caps == null ? null : caps.getAttribute("ver");
1684 ServiceDiscoveryResult discoveryResult = null;
1685 if (hash != null && ver != null) {
1686 discoveryResult =
1687 mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1688 }
1689 final boolean requestDiscoItemsFirst =
1690 !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1691 if (requestDiscoItemsFirst) {
1692 sendServiceDiscoveryItems(account.getDomain());
1693 }
1694 if (discoveryResult == null) {
1695 sendServiceDiscoveryInfo(account.getDomain());
1696 } else {
1697 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1698 disco.put(account.getDomain(), discoveryResult);
1699 }
1700 discoverMamPreferences();
1701 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1702 if (!requestDiscoItemsFirst) {
1703 sendServiceDiscoveryItems(account.getDomain());
1704 }
1705
1706 if (!mWaitForDisco.get()) {
1707 finalizeBind();
1708 }
1709 this.lastSessionStarted = SystemClock.elapsedRealtime();
1710 }
1711
1712 private void sendServiceDiscoveryInfo(final Jid jid) {
1713 mPendingServiceDiscoveries.incrementAndGet();
1714 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1715 iq.setTo(jid);
1716 iq.query("http://jabber.org/protocol/disco#info");
1717 this.sendIqPacket(
1718 iq,
1719 (account, packet) -> {
1720 if (packet.getType() == IqPacket.TYPE.RESULT) {
1721 boolean advancedStreamFeaturesLoaded;
1722 synchronized (XmppConnection.this.disco) {
1723 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1724 if (jid.equals(account.getDomain())) {
1725 mXmppConnectionService.databaseBackend.insertDiscoveryResult(
1726 result);
1727 }
1728 disco.put(jid, result);
1729 advancedStreamFeaturesLoaded =
1730 disco.containsKey(account.getDomain())
1731 && disco.containsKey(account.getJid().asBareJid());
1732 }
1733 if (advancedStreamFeaturesLoaded
1734 && (jid.equals(account.getDomain())
1735 || jid.equals(account.getJid().asBareJid()))) {
1736 enableAdvancedStreamFeatures();
1737 }
1738 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1739 Log.d(
1740 Config.LOGTAG,
1741 account.getJid().asBareJid()
1742 + ": could not query disco info for "
1743 + jid.toString());
1744 final boolean serverOrAccount =
1745 jid.equals(account.getDomain())
1746 || jid.equals(account.getJid().asBareJid());
1747 final boolean advancedStreamFeaturesLoaded;
1748 if (serverOrAccount) {
1749 synchronized (XmppConnection.this.disco) {
1750 disco.put(jid, ServiceDiscoveryResult.empty());
1751 advancedStreamFeaturesLoaded =
1752 disco.containsKey(account.getDomain())
1753 && disco.containsKey(account.getJid().asBareJid());
1754 }
1755 } else {
1756 advancedStreamFeaturesLoaded = false;
1757 }
1758 if (advancedStreamFeaturesLoaded) {
1759 enableAdvancedStreamFeatures();
1760 }
1761 }
1762 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1763 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1764 && mWaitForDisco.compareAndSet(true, false)) {
1765 finalizeBind();
1766 }
1767 }
1768 });
1769 }
1770
1771 private void discoverMamPreferences() {
1772 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1773 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1774 sendIqPacket(
1775 request,
1776 (account, response) -> {
1777 if (response.getType() == IqPacket.TYPE.RESULT) {
1778 Element prefs =
1779 response.findChild(
1780 "prefs", MessageArchiveService.Version.MAM_2.namespace);
1781 isMamPreferenceAlways =
1782 "always"
1783 .equals(
1784 prefs == null
1785 ? null
1786 : prefs.getAttribute("default"));
1787 }
1788 });
1789 }
1790
1791 private void discoverCommands() {
1792 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1793 request.setTo(account.getDomain());
1794 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1795 sendIqPacket(
1796 request,
1797 (account, response) -> {
1798 if (response.getType() == IqPacket.TYPE.RESULT) {
1799 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1800 if (query == null) {
1801 return;
1802 }
1803 final HashMap<String, Jid> commands = new HashMap<>();
1804 for (final Element child : query.getChildren()) {
1805 if ("item".equals(child.getName())) {
1806 final String node = child.getAttribute("node");
1807 final Jid jid = child.getAttributeAsJid("jid");
1808 if (node != null && jid != null) {
1809 commands.put(node, jid);
1810 }
1811 }
1812 }
1813 Log.d(Config.LOGTAG, commands.toString());
1814 synchronized (this.commands) {
1815 this.commands.clear();
1816 this.commands.putAll(commands);
1817 }
1818 }
1819 });
1820 }
1821
1822 public boolean isMamPreferenceAlways() {
1823 return isMamPreferenceAlways;
1824 }
1825
1826 private void finalizeBind() {
1827 Log.d(
1828 Config.LOGTAG,
1829 account.getJid().asBareJid() + ": online with resource " + account.getResource());
1830 if (bindListener != null) {
1831 bindListener.onBind(account);
1832 }
1833 changeStatus(Account.State.ONLINE);
1834 }
1835
1836 private void enableAdvancedStreamFeatures() {
1837 if (getFeatures().blocking() && !features.blockListRequested) {
1838 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1839 this.sendIqPacket(
1840 getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1841 }
1842 for (final OnAdvancedStreamFeaturesLoaded listener :
1843 advancedStreamFeaturesLoadedListeners) {
1844 listener.onAdvancedStreamFeaturesAvailable(account);
1845 }
1846 if (getFeatures().carbons() && !features.carbonsEnabled) {
1847 sendEnableCarbons();
1848 }
1849 if (getFeatures().commands()) {
1850 discoverCommands();
1851 }
1852 }
1853
1854 private void sendServiceDiscoveryItems(final Jid server) {
1855 mPendingServiceDiscoveries.incrementAndGet();
1856 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1857 iq.setTo(server.getDomain());
1858 iq.query("http://jabber.org/protocol/disco#items");
1859 this.sendIqPacket(
1860 iq,
1861 (account, packet) -> {
1862 if (packet.getType() == IqPacket.TYPE.RESULT) {
1863 final HashSet<Jid> items = new HashSet<>();
1864 final List<Element> elements = packet.query().getChildren();
1865 for (final Element element : elements) {
1866 if (element.getName().equals("item")) {
1867 final Jid jid =
1868 InvalidJid.getNullForInvalid(
1869 element.getAttributeAsJid("jid"));
1870 if (jid != null && !jid.equals(account.getDomain())) {
1871 items.add(jid);
1872 }
1873 }
1874 }
1875 for (Jid jid : items) {
1876 sendServiceDiscoveryInfo(jid);
1877 }
1878 } else {
1879 Log.d(
1880 Config.LOGTAG,
1881 account.getJid().asBareJid()
1882 + ": could not query disco items of "
1883 + server);
1884 }
1885 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1886 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1887 && mWaitForDisco.compareAndSet(true, false)) {
1888 finalizeBind();
1889 }
1890 }
1891 });
1892 }
1893
1894 private void sendEnableCarbons() {
1895 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1896 iq.addChild("enable", Namespace.CARBONS);
1897 this.sendIqPacket(
1898 iq,
1899 (account, packet) -> {
1900 if (packet.getType() == IqPacket.TYPE.RESULT) {
1901 Log.d(
1902 Config.LOGTAG,
1903 account.getJid().asBareJid() + ": successfully enabled carbons");
1904 features.carbonsEnabled = true;
1905 } else {
1906 Log.d(
1907 Config.LOGTAG,
1908 account.getJid().asBareJid()
1909 + ": could not enable carbons "
1910 + packet);
1911 }
1912 });
1913 }
1914
1915 private void processStreamError(final Tag currentTag) throws IOException {
1916 final Element streamError = tagReader.readElement(currentTag);
1917 if (streamError == null) {
1918 return;
1919 }
1920 if (streamError.hasChild("conflict")) {
1921 account.setResource(createNewResource());
1922 Log.d(
1923 Config.LOGTAG,
1924 account.getJid().asBareJid()
1925 + ": switching resource due to conflict ("
1926 + account.getResource()
1927 + ")");
1928 throw new IOException();
1929 } else if (streamError.hasChild("host-unknown")) {
1930 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1931 } else if (streamError.hasChild("policy-violation")) {
1932 this.lastConnect = SystemClock.elapsedRealtime();
1933 final String text = streamError.findChildContent("text");
1934 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1935 failPendingMessages(text);
1936 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1937 } else {
1938 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
1939 throw new StateChangingException(Account.State.STREAM_ERROR);
1940 }
1941 }
1942
1943 private void failPendingMessages(final String error) {
1944 synchronized (this.mStanzaQueue) {
1945 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1946 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1947 if (stanza instanceof MessagePacket) {
1948 final MessagePacket packet = (MessagePacket) stanza;
1949 final String id = packet.getId();
1950 final Jid to = packet.getTo();
1951 mXmppConnectionService.markMessage(
1952 account, to.asBareJid(), id, Message.STATUS_SEND_FAILED, error);
1953 }
1954 }
1955 }
1956 }
1957
1958 private void sendStartStream() throws IOException {
1959 final Tag stream = Tag.start("stream:stream");
1960 stream.setAttribute("to", account.getServer());
1961 stream.setAttribute("version", "1.0");
1962 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1963 stream.setAttribute("xmlns", "jabber:client");
1964 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1965 tagWriter.writeTag(stream);
1966 }
1967
1968 private String createNewResource() {
1969 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1970 }
1971
1972 private String nextRandomId() {
1973 return nextRandomId(false);
1974 }
1975
1976 private String nextRandomId(final boolean s) {
1977 return CryptoHelper.random(s ? 3 : 9);
1978 }
1979
1980 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1981 packet.setFrom(account.getJid());
1982 return this.sendUnmodifiedIqPacket(packet, callback, false);
1983 }
1984
1985 public synchronized String sendUnmodifiedIqPacket(
1986 final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1987 if (packet.getId() == null) {
1988 packet.setAttribute("id", nextRandomId());
1989 }
1990 if (callback != null) {
1991 synchronized (this.packetCallbacks) {
1992 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1993 }
1994 }
1995 this.sendPacket(packet, force);
1996 return packet.getId();
1997 }
1998
1999 public void sendMessagePacket(final MessagePacket packet) {
2000 this.sendPacket(packet);
2001 }
2002
2003 public void sendPresencePacket(final PresencePacket packet) {
2004 this.sendPacket(packet);
2005 }
2006
2007 private synchronized void sendPacket(final AbstractStanza packet) {
2008 sendPacket(packet, false);
2009 }
2010
2011 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
2012 if (stanzasSent == Integer.MAX_VALUE) {
2013 resetStreamId();
2014 disconnect(true);
2015 return;
2016 }
2017 synchronized (this.mStanzaQueue) {
2018 if (force || isBound) {
2019 tagWriter.writeStanzaAsync(packet);
2020 } else {
2021 Log.d(
2022 Config.LOGTAG,
2023 account.getJid().asBareJid()
2024 + " do not write stanza to unbound stream "
2025 + packet.toString());
2026 }
2027 if (packet instanceof AbstractAcknowledgeableStanza) {
2028 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
2029
2030 if (this.mStanzaQueue.size() != 0) {
2031 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
2032 if (currentHighestKey != stanzasSent) {
2033 throw new AssertionError("Stanza count messed up");
2034 }
2035 }
2036
2037 ++stanzasSent;
2038 this.mStanzaQueue.append(stanzasSent, stanza);
2039 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
2040 if (Config.EXTENDED_SM_LOGGING) {
2041 Log.d(
2042 Config.LOGTAG,
2043 account.getJid().asBareJid()
2044 + ": requesting ack for message stanza #"
2045 + stanzasSent);
2046 }
2047 tagWriter.writeStanzaAsync(new RequestPacket());
2048 }
2049 }
2050 }
2051 }
2052
2053 public void sendPing() {
2054 if (!r()) {
2055 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2056 iq.setFrom(account.getJid());
2057 iq.addChild("ping", Namespace.PING);
2058 this.sendIqPacket(iq, null);
2059 }
2060 this.lastPingSent = SystemClock.elapsedRealtime();
2061 }
2062
2063 public void setOnMessagePacketReceivedListener(final OnMessagePacketReceived listener) {
2064 this.messageListener = listener;
2065 }
2066
2067 public void setOnUnregisteredIqPacketReceivedListener(final OnIqPacketReceived listener) {
2068 this.unregisteredIqListener = listener;
2069 }
2070
2071 public void setOnPresencePacketReceivedListener(final OnPresencePacketReceived listener) {
2072 this.presenceListener = listener;
2073 }
2074
2075 public void setOnJinglePacketReceivedListener(final OnJinglePacketReceived listener) {
2076 this.jingleListener = listener;
2077 }
2078
2079 public void setOnStatusChangedListener(final OnStatusChanged listener) {
2080 this.statusListener = listener;
2081 }
2082
2083 public void setOnBindListener(final OnBindListener listener) {
2084 this.bindListener = listener;
2085 }
2086
2087 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
2088 this.acknowledgedListener = listener;
2089 }
2090
2091 public void addOnAdvancedStreamFeaturesAvailableListener(
2092 final OnAdvancedStreamFeaturesLoaded listener) {
2093 this.advancedStreamFeaturesLoadedListeners.add(listener);
2094 }
2095
2096 private void forceCloseSocket() {
2097 FileBackend.close(this.socket);
2098 FileBackend.close(this.tagReader);
2099 }
2100
2101 public void interrupt() {
2102 if (this.mThread != null) {
2103 this.mThread.interrupt();
2104 }
2105 }
2106
2107 public void disconnect(final boolean force) {
2108 interrupt();
2109 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
2110 if (force) {
2111 forceCloseSocket();
2112 } else {
2113 final TagWriter currentTagWriter = this.tagWriter;
2114 if (currentTagWriter.isActive()) {
2115 currentTagWriter.finish();
2116 final Socket currentSocket = this.socket;
2117 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
2118 try {
2119 currentTagWriter.await(1, TimeUnit.SECONDS);
2120 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
2121 currentTagWriter.writeTag(Tag.end("stream:stream"));
2122 if (streamCountDownLatch != null) {
2123 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
2124 Log.d(
2125 Config.LOGTAG,
2126 account.getJid().asBareJid() + ": remote ended stream");
2127 } else {
2128 Log.d(
2129 Config.LOGTAG,
2130 account.getJid().asBareJid()
2131 + ": remote has not closed socket. force closing");
2132 }
2133 }
2134 } catch (InterruptedException e) {
2135 Log.d(
2136 Config.LOGTAG,
2137 account.getJid().asBareJid()
2138 + ": interrupted while gracefully closing stream");
2139 } catch (final IOException e) {
2140 Log.d(
2141 Config.LOGTAG,
2142 account.getJid().asBareJid()
2143 + ": io exception during disconnect ("
2144 + e.getMessage()
2145 + ")");
2146 } finally {
2147 FileBackend.close(currentSocket);
2148 }
2149 } else {
2150 forceCloseSocket();
2151 }
2152 }
2153 }
2154
2155 private void resetStreamId() {
2156 this.streamId = null;
2157 }
2158
2159 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
2160 synchronized (this.disco) {
2161 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
2162 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
2163 if (cursor.getValue().getFeatures().contains(feature)) {
2164 items.add(cursor);
2165 }
2166 }
2167 return items;
2168 }
2169 }
2170
2171 public Jid findDiscoItemByFeature(final String feature) {
2172 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
2173 if (items.size() >= 1) {
2174 return items.get(0).getKey();
2175 }
2176 return null;
2177 }
2178
2179 public boolean r() {
2180 if (getFeatures().sm()) {
2181 this.tagWriter.writeStanzaAsync(new RequestPacket());
2182 return true;
2183 } else {
2184 return false;
2185 }
2186 }
2187
2188 public List<String> getMucServersWithholdAccount() {
2189 final List<String> servers = getMucServers();
2190 servers.remove(account.getDomain().toEscapedString());
2191 return servers;
2192 }
2193
2194 public List<String> getMucServers() {
2195 List<String> servers = new ArrayList<>();
2196 synchronized (this.disco) {
2197 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
2198 final ServiceDiscoveryResult value = cursor.getValue();
2199 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
2200 && value.hasIdentity("conference", "text")
2201 && !value.getFeatures().contains("jabber:iq:gateway")
2202 && !value.hasIdentity("conference", "irc")) {
2203 servers.add(cursor.getKey().toString());
2204 }
2205 }
2206 }
2207 return servers;
2208 }
2209
2210 public String getMucServer() {
2211 List<String> servers = getMucServers();
2212 return servers.size() > 0 ? servers.get(0) : null;
2213 }
2214
2215 public int getTimeToNextAttempt() {
2216 final int additionalTime =
2217 account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
2218 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
2219 final int secondsSinceLast =
2220 (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
2221 return interval - secondsSinceLast;
2222 }
2223
2224 public int getAttempt() {
2225 return this.attempt;
2226 }
2227
2228 public Features getFeatures() {
2229 return this.features;
2230 }
2231
2232 public long getLastSessionEstablished() {
2233 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
2234 return System.currentTimeMillis() - diff;
2235 }
2236
2237 public long getLastConnect() {
2238 return this.lastConnect;
2239 }
2240
2241 public long getLastPingSent() {
2242 return this.lastPingSent;
2243 }
2244
2245 public long getLastDiscoStarted() {
2246 return this.lastDiscoStarted;
2247 }
2248
2249 public long getLastPacketReceived() {
2250 return this.lastPacketReceived;
2251 }
2252
2253 public void sendActive() {
2254 this.sendPacket(new ActivePacket());
2255 }
2256
2257 public void sendInactive() {
2258 this.sendPacket(new InactivePacket());
2259 }
2260
2261 public void resetAttemptCount(boolean resetConnectTime) {
2262 this.attempt = 0;
2263 if (resetConnectTime) {
2264 this.lastConnect = 0;
2265 }
2266 }
2267
2268 public void setInteractive(boolean interactive) {
2269 this.mInteractive = interactive;
2270 }
2271
2272 public Identity getServerIdentity() {
2273 synchronized (this.disco) {
2274 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
2275 if (result == null) {
2276 return Identity.UNKNOWN;
2277 }
2278 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
2279 if (id.getType().equals("im")
2280 && id.getCategory().equals("server")
2281 && id.getName() != null) {
2282 switch (id.getName()) {
2283 case "Prosody":
2284 return Identity.PROSODY;
2285 case "ejabberd":
2286 return Identity.EJABBERD;
2287 case "Slack-XMPP":
2288 return Identity.SLACK;
2289 }
2290 }
2291 }
2292 }
2293 return Identity.UNKNOWN;
2294 }
2295
2296 private IqGenerator getIqGenerator() {
2297 return mXmppConnectionService.getIqGenerator();
2298 }
2299
2300 public enum Identity {
2301 FACEBOOK,
2302 SLACK,
2303 EJABBERD,
2304 PROSODY,
2305 NIMBUZZ,
2306 UNKNOWN
2307 }
2308
2309 private class MyKeyManager implements X509KeyManager {
2310 @Override
2311 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
2312 return account.getPrivateKeyAlias();
2313 }
2314
2315 @Override
2316 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
2317 return null;
2318 }
2319
2320 @Override
2321 public X509Certificate[] getCertificateChain(String alias) {
2322 Log.d(Config.LOGTAG, "getting certificate chain");
2323 try {
2324 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
2325 } catch (final Exception e) {
2326 Log.d(Config.LOGTAG, "could not get certificate chain", e);
2327 return new X509Certificate[0];
2328 }
2329 }
2330
2331 @Override
2332 public String[] getClientAliases(String s, Principal[] principals) {
2333 final String alias = account.getPrivateKeyAlias();
2334 return alias != null ? new String[] {alias} : new String[0];
2335 }
2336
2337 @Override
2338 public String[] getServerAliases(String s, Principal[] principals) {
2339 return new String[0];
2340 }
2341
2342 @Override
2343 public PrivateKey getPrivateKey(String alias) {
2344 try {
2345 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
2346 } catch (Exception e) {
2347 return null;
2348 }
2349 }
2350 }
2351
2352 private static class StateChangingError extends Error {
2353 private final Account.State state;
2354
2355 public StateChangingError(Account.State state) {
2356 this.state = state;
2357 }
2358 }
2359
2360 private static class StateChangingException extends IOException {
2361 private final Account.State state;
2362
2363 public StateChangingException(Account.State state) {
2364 this.state = state;
2365 }
2366 }
2367
2368 public class Features {
2369 XmppConnection connection;
2370 private boolean carbonsEnabled = false;
2371 private boolean encryptionEnabled = false;
2372 private boolean blockListRequested = false;
2373
2374 public Features(final XmppConnection connection) {
2375 this.connection = connection;
2376 }
2377
2378 private boolean hasDiscoFeature(final Jid server, final String feature) {
2379 synchronized (XmppConnection.this.disco) {
2380 final ServiceDiscoveryResult sdr = connection.disco.get(server);
2381 return sdr != null && sdr.getFeatures().contains(feature);
2382 }
2383 }
2384
2385 public boolean carbons() {
2386 return hasDiscoFeature(account.getDomain(), Namespace.CARBONS);
2387 }
2388
2389 public boolean commands() {
2390 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2391 }
2392
2393 public boolean easyOnboardingInvites() {
2394 synchronized (commands) {
2395 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2396 }
2397 }
2398
2399 public boolean bookmarksConversion() {
2400 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION)
2401 && pepPublishOptions();
2402 }
2403
2404 public boolean avatarConversion() {
2405 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION)
2406 && pepPublishOptions();
2407 }
2408
2409 public boolean blocking() {
2410 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2411 }
2412
2413 public boolean spamReporting() {
2414 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
2415 }
2416
2417 public boolean flexibleOfflineMessageRetrieval() {
2418 return hasDiscoFeature(
2419 account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2420 }
2421
2422 public boolean register() {
2423 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2424 }
2425
2426 public boolean invite() {
2427 return connection.streamFeatures != null
2428 && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2429 }
2430
2431 public boolean sm() {
2432 return streamId != null
2433 || (connection.streamFeatures != null
2434 && connection.streamFeatures.hasChild("sm"));
2435 }
2436
2437 public boolean csi() {
2438 return connection.streamFeatures != null
2439 && connection.streamFeatures.hasChild("csi", Namespace.CSI);
2440 }
2441
2442 public boolean pep() {
2443 synchronized (XmppConnection.this.disco) {
2444 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2445 return info != null && info.hasIdentity("pubsub", "pep");
2446 }
2447 }
2448
2449 public boolean pepPersistent() {
2450 synchronized (XmppConnection.this.disco) {
2451 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2452 return info != null
2453 && info.getFeatures()
2454 .contains("http://jabber.org/protocol/pubsub#persistent-items");
2455 }
2456 }
2457
2458 public boolean pepPublishOptions() {
2459 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2460 }
2461
2462 public boolean pepOmemoWhitelisted() {
2463 return hasDiscoFeature(
2464 account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2465 }
2466
2467 public boolean mam() {
2468 return MessageArchiveService.Version.has(getAccountFeatures());
2469 }
2470
2471 public List<String> getAccountFeatures() {
2472 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2473 return result == null ? Collections.emptyList() : result.getFeatures();
2474 }
2475
2476 public boolean push() {
2477 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2478 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2479 }
2480
2481 public boolean rosterVersioning() {
2482 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2483 }
2484
2485 public void setBlockListRequested(boolean value) {
2486 this.blockListRequested = value;
2487 }
2488
2489 public boolean httpUpload(long filesize) {
2490 if (Config.DISABLE_HTTP_UPLOAD) {
2491 return false;
2492 } else {
2493 for (String namespace :
2494 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2495 List<Entry<Jid, ServiceDiscoveryResult>> items =
2496 findDiscoItemsByFeature(namespace);
2497 if (items.size() > 0) {
2498 try {
2499 long maxsize =
2500 Long.parseLong(
2501 items.get(0)
2502 .getValue()
2503 .getExtendedDiscoInformation(
2504 namespace, "max-file-size"));
2505 if (filesize <= maxsize) {
2506 return true;
2507 } else {
2508 Log.d(
2509 Config.LOGTAG,
2510 account.getJid().asBareJid()
2511 + ": http upload is not available for files with size "
2512 + filesize
2513 + " (max is "
2514 + maxsize
2515 + ")");
2516 return false;
2517 }
2518 } catch (Exception e) {
2519 return true;
2520 }
2521 }
2522 }
2523 return false;
2524 }
2525 }
2526
2527 public boolean useLegacyHttpUpload() {
2528 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null
2529 && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2530 }
2531
2532 public long getMaxHttpUploadSize() {
2533 for (String namespace :
2534 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2535 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2536 if (items.size() > 0) {
2537 try {
2538 return Long.parseLong(
2539 items.get(0)
2540 .getValue()
2541 .getExtendedDiscoInformation(namespace, "max-file-size"));
2542 } catch (Exception e) {
2543 // ignored
2544 }
2545 }
2546 }
2547 return -1;
2548 }
2549
2550 public boolean stanzaIds() {
2551 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2552 }
2553
2554 public boolean bookmarks2() {
2555 return Config
2556 .USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
2557 }
2558
2559 public boolean externalServiceDiscovery() {
2560 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2561 }
2562 }
2563}