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