1package eu.siacs.conversations.xmpp;
2
3import static eu.siacs.conversations.utils.Random.SECURE_RANDOM;
4
5import android.content.Context;
6import android.graphics.Bitmap;
7import android.graphics.BitmapFactory;
8import android.os.Build;
9import android.os.SystemClock;
10import android.security.KeyChain;
11import android.util.Base64;
12import android.util.Log;
13import android.util.Pair;
14import android.util.SparseArray;
15
16import androidx.annotation.NonNull;
17import androidx.annotation.Nullable;
18
19import com.google.common.base.Strings;
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.HashedToken;
68import eu.siacs.conversations.crypto.sasl.SaslMechanism;
69import eu.siacs.conversations.entities.Account;
70import eu.siacs.conversations.entities.Message;
71import eu.siacs.conversations.entities.ServiceDiscoveryResult;
72import eu.siacs.conversations.generator.IqGenerator;
73import eu.siacs.conversations.http.HttpConnectionManager;
74import eu.siacs.conversations.persistance.FileBackend;
75import eu.siacs.conversations.services.MemorizingTrustManager;
76import eu.siacs.conversations.services.MessageArchiveService;
77import eu.siacs.conversations.services.NotificationService;
78import eu.siacs.conversations.services.XmppConnectionService;
79import eu.siacs.conversations.utils.CryptoHelper;
80import eu.siacs.conversations.utils.Patterns;
81import eu.siacs.conversations.utils.PhoneHelper;
82import eu.siacs.conversations.utils.Resolver;
83import eu.siacs.conversations.utils.SSLSockets;
84import eu.siacs.conversations.utils.SocksSocketFactory;
85import eu.siacs.conversations.utils.XmlHelper;
86import eu.siacs.conversations.xml.Element;
87import eu.siacs.conversations.xml.LocalizedContent;
88import eu.siacs.conversations.xml.Namespace;
89import eu.siacs.conversations.xml.Tag;
90import eu.siacs.conversations.xml.TagWriter;
91import eu.siacs.conversations.xml.XmlReader;
92import eu.siacs.conversations.xmpp.bind.Bind2;
93import eu.siacs.conversations.xmpp.forms.Data;
94import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
95import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
96import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
97import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
98import eu.siacs.conversations.xmpp.stanzas.IqPacket;
99import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
100import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
101import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
102import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
103import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
104import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
105import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
106import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
107import okhttp3.HttpUrl;
108
109public class XmppConnection implements Runnable {
110
111 private static final int PACKET_IQ = 0;
112 private static final int PACKET_MESSAGE = 1;
113 private static final int PACKET_PRESENCE = 2;
114 public final OnIqPacketReceived registrationResponseListener =
115 (account, packet) -> {
116 if (packet.getType() == IqPacket.TYPE.RESULT) {
117 account.setOption(Account.OPTION_REGISTER, false);
118 Log.d(
119 Config.LOGTAG,
120 account.getJid().asBareJid()
121 + ": successfully registered new account on server");
122 throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL);
123 } else {
124 final List<String> PASSWORD_TOO_WEAK_MSGS =
125 Arrays.asList(
126 "The password is too weak", "Please use a longer password.");
127 Element error = packet.findChild("error");
128 Account.State state = Account.State.REGISTRATION_FAILED;
129 if (error != null) {
130 if (error.hasChild("conflict")) {
131 state = Account.State.REGISTRATION_CONFLICT;
132 } else if (error.hasChild("resource-constraint")
133 && "wait".equals(error.getAttribute("type"))) {
134 state = Account.State.REGISTRATION_PLEASE_WAIT;
135 } else if (error.hasChild("not-acceptable")
136 && PASSWORD_TOO_WEAK_MSGS.contains(
137 error.findChildContent("text"))) {
138 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
139 }
140 }
141 throw new StateChangingError(state);
142 }
143 };
144 protected final Account account;
145 private final Features features = new Features(this);
146 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
147 private final HashMap<String, Jid> commands = new HashMap<>();
148 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
149 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks =
150 new Hashtable<>();
151 private final Set<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners =
152 new HashSet<>();
153 private final XmppConnectionService mXmppConnectionService;
154 private Socket socket;
155 private XmlReader tagReader;
156 private TagWriter tagWriter = new TagWriter();
157 private boolean shouldAuthenticate = true;
158 private boolean inSmacksSession = false;
159 private boolean quickStartInProgress = false;
160 private boolean isBound = false;
161 private Element streamFeatures;
162 private String streamId = null;
163 private int stanzasReceived = 0;
164 private int stanzasSent = 0;
165 private long lastPacketReceived = 0;
166 private long lastPingSent = 0;
167 private long lastConnect = 0;
168 private long lastSessionStarted = 0;
169 private long lastDiscoStarted = 0;
170 private boolean isMamPreferenceAlways = false;
171 private final AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
172 private final AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
173 private final AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
174 private final AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
175 private boolean mInteractive = false;
176 private int attempt = 0;
177 private OnPresencePacketReceived presenceListener = null;
178 private OnJinglePacketReceived jingleListener = null;
179 private OnIqPacketReceived unregisteredIqListener = null;
180 private OnMessagePacketReceived messageListener = null;
181 private OnStatusChanged statusListener = null;
182 private OnBindListener bindListener = null;
183 private OnMessageAcknowledged acknowledgedListener = null;
184 private SaslMechanism saslMechanism;
185 private HashedToken.Mechanism hashTokenRequest;
186 private HttpUrl redirectionUrl = null;
187 private String verifiedHostname = null;
188 private volatile Thread mThread;
189 private CountDownLatch mStreamCountDownLatch;
190
191 public XmppConnection(final Account account, final XmppConnectionService service) {
192 this.account = account;
193 this.mXmppConnectionService = service;
194 }
195
196 private static void fixResource(Context context, Account account) {
197 String resource = account.getResource();
198 int fixedPartLength =
199 context.getString(R.string.app_name).length() + 1; // include the trailing dot
200 int randomPartLength = 4; // 3 bytes
201 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
202 if (validBase64(
203 resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
204 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
205 }
206 }
207 }
208
209 private static boolean validBase64(String input) {
210 try {
211 return Base64.decode(input, Base64.URL_SAFE).length == 3;
212 } catch (Throwable throwable) {
213 return false;
214 }
215 }
216
217 private void changeStatus(final Account.State nextStatus) {
218 synchronized (this) {
219 if (Thread.currentThread().isInterrupted()) {
220 Log.d(
221 Config.LOGTAG,
222 account.getJid().asBareJid()
223 + ": not changing status to "
224 + nextStatus
225 + " because thread was interrupted");
226 return;
227 }
228 if (account.getStatus() != nextStatus) {
229 if ((nextStatus == Account.State.OFFLINE)
230 && (account.getStatus() != Account.State.CONNECTING)
231 && (account.getStatus() != Account.State.ONLINE)
232 && (account.getStatus() != Account.State.DISABLED)) {
233 return;
234 }
235 if (nextStatus == Account.State.ONLINE) {
236 this.attempt = 0;
237 }
238 account.setStatus(nextStatus);
239 } else {
240 return;
241 }
242 }
243 if (statusListener != null) {
244 statusListener.onStatusChanged(account);
245 }
246 }
247
248 public Jid getJidForCommand(final String node) {
249 synchronized (this.commands) {
250 return this.commands.get(node);
251 }
252 }
253
254 public void prepareNewConnection() {
255 this.lastConnect = SystemClock.elapsedRealtime();
256 this.lastPingSent = SystemClock.elapsedRealtime();
257 this.lastDiscoStarted = Long.MAX_VALUE;
258 this.mWaitingForSmCatchup.set(false);
259 this.changeStatus(Account.State.CONNECTING);
260 }
261
262 public boolean isWaitingForSmCatchup() {
263 return mWaitingForSmCatchup.get();
264 }
265
266 public void incrementSmCatchupMessageCounter() {
267 this.mSmCatchupMessageCounter.incrementAndGet();
268 }
269
270 protected void connect() {
271 if (mXmppConnectionService.areMessagesInitialized()) {
272 mXmppConnectionService.resetSendingToWaiting(account);
273 }
274 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
275 features.encryptionEnabled = false;
276 this.inSmacksSession = false;
277 this.quickStartInProgress = false;
278 this.isBound = false;
279 this.attempt++;
280 this.verifiedHostname = null; // will be set if user entered hostname is being used or hostname was verified
281 // with dnssec
282 try {
283 Socket localSocket;
284 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
285 this.changeStatus(Account.State.CONNECTING);
286 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
287 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
288 if (useTor) {
289 String destination;
290 if (account.getHostname().isEmpty() || account.isOnion()) {
291 destination = account.getServer();
292 } else {
293 destination = account.getHostname();
294 this.verifiedHostname = destination;
295 }
296
297 final int port = account.getPort();
298 final boolean directTls = Resolver.useDirectTls(port);
299
300 Log.d(
301 Config.LOGTAG,
302 account.getJid().asBareJid()
303 + ": connect to "
304 + destination
305 + " via Tor. directTls="
306 + directTls);
307 localSocket = SocksSocketFactory.createSocketOverTor(destination, port);
308
309 if (directTls) {
310 localSocket = upgradeSocketToTls(localSocket);
311 features.encryptionEnabled = true;
312 }
313
314 try {
315 startXmpp(localSocket);
316 } catch (final InterruptedException e) {
317 Log.d(
318 Config.LOGTAG,
319 account.getJid().asBareJid()
320 + ": thread was interrupted before beginning stream");
321 return;
322 } catch (final Exception e) {
323 throw new IOException("Could not start stream", e);
324 }
325 } else {
326 final String domain = account.getServer();
327 final List<Resolver.Result> results;
328 final boolean hardcoded = extended && !account.getHostname().isEmpty();
329 if (hardcoded) {
330 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
331 } else {
332 results = Resolver.resolve(domain);
333 }
334 if (Thread.currentThread().isInterrupted()) {
335 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
336 return;
337 }
338 if (results.size() == 0) {
339 Log.e(
340 Config.LOGTAG,
341 account.getJid().asBareJid() + ": Resolver results were empty");
342 return;
343 }
344 final Resolver.Result storedBackupResult;
345 if (hardcoded) {
346 storedBackupResult = null;
347 } else {
348 storedBackupResult =
349 mXmppConnectionService.databaseBackend.findResolverResult(domain);
350 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
351 results.add(storedBackupResult);
352 Log.d(
353 Config.LOGTAG,
354 account.getJid().asBareJid()
355 + ": loaded backup resolver result from db: "
356 + storedBackupResult);
357 }
358 }
359 for (Iterator<Resolver.Result> iterator = results.iterator();
360 iterator.hasNext(); ) {
361 final Resolver.Result result = iterator.next();
362 if (Thread.currentThread().isInterrupted()) {
363 Log.d(
364 Config.LOGTAG,
365 account.getJid().asBareJid() + ": Thread was interrupted");
366 return;
367 }
368 try {
369 // if tls is true, encryption is implied and must not be started
370 features.encryptionEnabled = result.isDirectTls();
371 verifiedHostname =
372 result.isAuthenticated() ? result.getHostname().toString() : null;
373 Log.d(Config.LOGTAG, "verified hostname " + verifiedHostname);
374 final InetSocketAddress addr;
375 if (result.getIp() != null) {
376 addr = new InetSocketAddress(result.getIp(), result.getPort());
377 Log.d(
378 Config.LOGTAG,
379 account.getJid().asBareJid().toString()
380 + ": using values from resolver "
381 + (result.getHostname() == null
382 ? ""
383 : result.getHostname().toString() + "/")
384 + result.getIp().getHostAddress()
385 + ":"
386 + result.getPort()
387 + " tls: "
388 + features.encryptionEnabled);
389 } else {
390 addr =
391 new InetSocketAddress(
392 IDN.toASCII(result.getHostname().toString()),
393 result.getPort());
394 Log.d(
395 Config.LOGTAG,
396 account.getJid().asBareJid().toString()
397 + ": using values from resolver "
398 + result.getHostname().toString()
399 + ":"
400 + result.getPort()
401 + " tls: "
402 + features.encryptionEnabled);
403 }
404
405 localSocket = new Socket();
406 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
407
408 if (features.encryptionEnabled) {
409 localSocket = upgradeSocketToTls(localSocket);
410 }
411
412 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
413 if (startXmpp(localSocket)) {
414 localSocket.setSoTimeout(
415 0); // reset to 0; once the connection is established we don’t
416 // want this
417 if (!hardcoded && !result.equals(storedBackupResult)) {
418 mXmppConnectionService.databaseBackend.saveResolverResult(
419 domain, result);
420 }
421 break; // successfully connected to server that speaks xmpp
422 } else {
423 FileBackend.close(localSocket);
424 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
425 }
426 } catch (final StateChangingException e) {
427 if (!iterator.hasNext()) {
428 throw e;
429 }
430 } catch (InterruptedException e) {
431 Log.d(
432 Config.LOGTAG,
433 account.getJid().asBareJid()
434 + ": thread was interrupted before beginning stream");
435 return;
436 } catch (final Throwable e) {
437 Log.d(
438 Config.LOGTAG,
439 account.getJid().asBareJid().toString()
440 + ": "
441 + e.getMessage()
442 + "("
443 + e.getClass().getName()
444 + ")");
445 if (!iterator.hasNext()) {
446 throw new UnknownHostException();
447 }
448 }
449 }
450 }
451 processStream();
452 } catch (final SecurityException e) {
453 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
454 } catch (final StateChangingException e) {
455 this.changeStatus(e.state);
456 } catch (final UnknownHostException
457 | ConnectException
458 | SocksSocketFactory.HostNotFoundException e) {
459 this.changeStatus(Account.State.SERVER_NOT_FOUND);
460 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
461 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
462 } catch (final IOException | XmlPullParserException e) {
463 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
464 this.changeStatus(Account.State.OFFLINE);
465 this.attempt = Math.max(0, this.attempt - 1);
466 } finally {
467 if (!Thread.currentThread().isInterrupted()) {
468 forceCloseSocket();
469 } else {
470 Log.d(
471 Config.LOGTAG,
472 account.getJid().asBareJid()
473 + ": not force closing socket because thread was interrupted");
474 }
475 }
476 }
477
478 /**
479 * Starts xmpp protocol, call after connecting to socket
480 *
481 * @return true if server returns with valid xmpp, false otherwise
482 */
483 private boolean startXmpp(final Socket socket) throws Exception {
484 if (Thread.currentThread().isInterrupted()) {
485 throw new InterruptedException();
486 }
487 this.socket = socket;
488 tagReader = new XmlReader();
489 if (tagWriter != null) {
490 tagWriter.forceClose();
491 }
492 tagWriter = new TagWriter();
493 tagWriter.setOutputStream(socket.getOutputStream());
494 tagReader.setInputStream(socket.getInputStream());
495 tagWriter.beginDocument();
496 final boolean quickStart;
497 if (socket instanceof SSLSocket) {
498 final SSLSocket sslSocket = (SSLSocket) socket;
499 SSLSockets.log(account, sslSocket);
500 quickStart = establishStream(SSLSockets.version(sslSocket));
501 } else {
502 quickStart = establishStream(SSLSockets.Version.NONE);
503 }
504 final Tag tag = tagReader.readTag();
505 if (Thread.currentThread().isInterrupted()) {
506 throw new InterruptedException();
507 }
508 final boolean success = tag != null && tag.isStart("stream", Namespace.STREAMS);
509 if (success && quickStart) {
510 this.quickStartInProgress = true;
511 }
512 return success;
513 }
514
515 private SSLSocketFactory getSSLSocketFactory()
516 throws NoSuchAlgorithmException, KeyManagementException {
517 final SSLContext sc = SSLSockets.getSSLContext();
518 final MemorizingTrustManager trustManager =
519 this.mXmppConnectionService.getMemorizingTrustManager();
520 final KeyManager[] keyManager;
521 if (account.getPrivateKeyAlias() != null) {
522 keyManager = new KeyManager[] {new MyKeyManager()};
523 } else {
524 keyManager = null;
525 }
526 final String domain = account.getServer();
527 sc.init(
528 keyManager,
529 new X509TrustManager[] {
530 mInteractive
531 ? trustManager.getInteractive(domain)
532 : trustManager.getNonInteractive(domain)
533 },
534 SECURE_RANDOM);
535 return sc.getSocketFactory();
536 }
537
538 @Override
539 public void run() {
540 synchronized (this) {
541 this.mThread = Thread.currentThread();
542 if (this.mThread.isInterrupted()) {
543 Log.d(
544 Config.LOGTAG,
545 account.getJid().asBareJid()
546 + ": aborting connect because thread was interrupted");
547 return;
548 }
549 forceCloseSocket();
550 }
551 connect();
552 }
553
554 private void processStream() throws XmlPullParserException, IOException {
555 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
556 this.mStreamCountDownLatch = streamCountDownLatch;
557 Tag nextTag = tagReader.readTag();
558 while (nextTag != null && !nextTag.isEnd("stream")) {
559 if (nextTag.isStart("error")) {
560 processStreamError(nextTag);
561 } else if (nextTag.isStart("features", Namespace.STREAMS)) {
562 processStreamFeatures(nextTag);
563 } else if (nextTag.isStart("proceed", Namespace.TLS)) {
564 switchOverToTls();
565 } else if (nextTag.isStart("success")) {
566 final Element success = tagReader.readElement(nextTag);
567 if (processSuccess(success)) {
568 break;
569 }
570
571 } else if (nextTag.isStart("failure", Namespace.TLS)) {
572 throw new StateChangingException(Account.State.TLS_ERROR);
573 } else if (nextTag.isStart("failure")) {
574 final Element failure = tagReader.readElement(nextTag);
575 processFailure(failure);
576 } else if (nextTag.isStart("continue", Namespace.SASL_2)) {
577 // two step sasl2 - we don’t support this yet
578 throw new StateChangingException(Account.State.INCOMPATIBLE_CLIENT);
579 } else if (nextTag.isStart("challenge")) {
580 final Element challenge = tagReader.readElement(nextTag);
581 processChallenge(challenge);
582 } else if (nextTag.isStart("enabled", Namespace.STREAM_MANAGEMENT)) {
583 final Element enabled = tagReader.readElement(nextTag);
584 processEnabled(enabled);
585 } else if (nextTag.isStart("resumed")) {
586 final Element resumed = tagReader.readElement(nextTag);
587 processResumed(resumed);
588 } else if (nextTag.isStart("r")) {
589 tagReader.readElement(nextTag);
590 if (Config.EXTENDED_SM_LOGGING) {
591 Log.d(
592 Config.LOGTAG,
593 account.getJid().asBareJid()
594 + ": acknowledging stanza #"
595 + this.stanzasReceived);
596 }
597 final AckPacket ack = new AckPacket(this.stanzasReceived);
598 tagWriter.writeStanzaAsync(ack);
599 } else if (nextTag.isStart("a")) {
600 boolean accountUiNeedsRefresh = false;
601 synchronized (NotificationService.CATCHUP_LOCK) {
602 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
603 final int messageCount = mSmCatchupMessageCounter.get();
604 final int pendingIQs = packetCallbacks.size();
605 Log.d(
606 Config.LOGTAG,
607 account.getJid().asBareJid()
608 + ": SM catchup complete (messages="
609 + messageCount
610 + ", pending IQs="
611 + pendingIQs
612 + ")");
613 accountUiNeedsRefresh = true;
614 if (messageCount > 0) {
615 mXmppConnectionService
616 .getNotificationService()
617 .finishBacklog(true, account);
618 }
619 }
620 }
621 if (accountUiNeedsRefresh) {
622 mXmppConnectionService.updateAccountUi();
623 }
624 final Element ack = tagReader.readElement(nextTag);
625 lastPacketReceived = SystemClock.elapsedRealtime();
626 try {
627 final boolean acknowledgedMessages;
628 synchronized (this.mStanzaQueue) {
629 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
630 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
631 }
632 if (acknowledgedMessages) {
633 mXmppConnectionService.updateConversationUi();
634 }
635 } catch (NumberFormatException | NullPointerException e) {
636 Log.d(
637 Config.LOGTAG,
638 account.getJid().asBareJid()
639 + ": server send ack without sequence number");
640 }
641 } else if (nextTag.isStart("failed")) {
642 final Element failed = tagReader.readElement(nextTag);
643 processFailed(failed, true);
644 } else if (nextTag.isStart("iq")) {
645 processIq(nextTag);
646 } else if (nextTag.isStart("message")) {
647 processMessage(nextTag);
648 } else if (nextTag.isStart("presence")) {
649 processPresence(nextTag);
650 }
651 nextTag = tagReader.readTag();
652 }
653 if (nextTag != null && nextTag.isEnd("stream")) {
654 streamCountDownLatch.countDown();
655 }
656 }
657
658 private void processChallenge(Element challenge) throws IOException {
659 final SaslMechanism.Version version;
660 try {
661 version = SaslMechanism.Version.of(challenge);
662 } catch (final IllegalArgumentException e) {
663 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
664 }
665 final Element response;
666 if (version == SaslMechanism.Version.SASL) {
667 response = new Element("response", Namespace.SASL);
668 } else if (version == SaslMechanism.Version.SASL_2) {
669 response = new Element("response", Namespace.SASL_2);
670 } else {
671 throw new AssertionError("Missing implementation for " + version);
672 }
673 try {
674 response.setContent(saslMechanism.getResponse(challenge.getContent(), sslSocketOrNull(socket)));
675 } catch (final SaslMechanism.AuthenticationException e) {
676 // TODO: Send auth abort tag.
677 Log.e(Config.LOGTAG, e.toString());
678 throw new StateChangingException(Account.State.UNAUTHORIZED);
679 }
680 tagWriter.writeElement(response);
681 }
682
683 private boolean processSuccess(final Element success)
684 throws IOException, XmlPullParserException {
685 final SaslMechanism.Version version;
686 try {
687 version = SaslMechanism.Version.of(success);
688 } catch (final IllegalArgumentException e) {
689 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
690 }
691 final String challenge;
692 if (version == SaslMechanism.Version.SASL) {
693 challenge = success.getContent();
694 } else if (version == SaslMechanism.Version.SASL_2) {
695 challenge = success.findChildContent("additional-data");
696 } else {
697 throw new AssertionError("Missing implementation for " + version);
698 }
699 try {
700 saslMechanism.getResponse(challenge, sslSocketOrNull(socket));
701 } catch (final SaslMechanism.AuthenticationException e) {
702 Log.e(Config.LOGTAG, String.valueOf(e));
703 throw new StateChangingException(Account.State.UNAUTHORIZED);
704 }
705 Log.d(
706 Config.LOGTAG,
707 account.getJid().asBareJid().toString() + ": logged in (using " + version + ")");
708 if (SaslMechanism.pin(this.saslMechanism)) {
709 account.setPinnedMechanism(this.saslMechanism);
710 }
711 if (version == SaslMechanism.Version.SASL_2) {
712 final Tag tag = tagReader.readTag();
713 if (tag != null && tag.isStart("features", Namespace.STREAMS)) {
714 this.streamFeatures = tagReader.readElement(tag);
715 Log.d(
716 Config.LOGTAG,
717 account.getJid().asBareJid()
718 + ": processed NOP stream features after success "
719 + XmlHelper.printElementNames(this.streamFeatures));
720 } else {
721 Log.d(
722 Config.LOGTAG,
723 account.getJid().asBareJid()
724 + ": server did not send stream features after SASL2 success");
725 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
726 }
727 final String authorizationIdentifier =
728 success.findChildContent("authorization-identifier");
729 final Jid authorizationJid;
730 try {
731 authorizationJid =
732 Strings.isNullOrEmpty(authorizationIdentifier)
733 ? null
734 : Jid.ofEscaped(authorizationIdentifier);
735 } catch (final IllegalArgumentException e) {
736 Log.d(
737 Config.LOGTAG,
738 account.getJid().asBareJid()
739 + ": SASL 2.0 authorization identifier was not a valid jid");
740 throw new StateChangingException(Account.State.BIND_FAILURE);
741 }
742 if (authorizationJid == null) {
743 throw new StateChangingException(Account.State.BIND_FAILURE);
744 }
745 Log.d(
746 Config.LOGTAG,
747 account.getJid().asBareJid()
748 + ": SASL 2.0 authorization identifier was "
749 + authorizationJid);
750 if (!account.getJid().getDomain().equals(authorizationJid.getDomain())) {
751 Log.d(
752 Config.LOGTAG,
753 account.getJid().asBareJid()
754 + ": server tried to re-assign domain to "
755 + authorizationJid.getDomain());
756 throw new StateChangingError(Account.State.BIND_FAILURE);
757 }
758 if (authorizationJid.isFullJid() && account.setJid(authorizationJid)) {
759 Log.d(
760 Config.LOGTAG,
761 account.getJid().asBareJid()
762 + ": jid changed during SASL 2.0. updating database");
763 }
764 final Element bound = success.findChild("bound", Namespace.BIND2);
765 final Element resumed = success.findChild("resumed", "urn:xmpp:sm:3");
766 final Element failed = success.findChild("failed", "urn:xmpp:sm:3");
767 final Element tokenWrapper = success.findChild("token", Namespace.FAST);
768 final String token = tokenWrapper == null ? null : tokenWrapper.getAttribute("token");
769 if (bound != null && resumed != null) {
770 Log.d(
771 Config.LOGTAG,
772 account.getJid().asBareJid()
773 + ": server sent bound and resumed in SASL2 success");
774 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
775 }
776 if (resumed != null && streamId != null) {
777 processResumed(resumed);
778 } else if (failed != null) {
779 processFailed(failed, false); // wait for new stream features
780 }
781 if (bound != null) {
782 clearIqCallbacks();
783 this.isBound = true;
784 final Element streamManagementEnabled =
785 bound.findChild("enabled", Namespace.STREAM_MANAGEMENT);
786 final Element carbonsEnabled = bound.findChild("enabled", Namespace.CARBONS);
787 final boolean waitForDisco;
788 if (streamManagementEnabled != null) {
789 processEnabled(streamManagementEnabled);
790 waitForDisco = true;
791 } else {
792 //if we did not enable stream management in bind do it now
793 waitForDisco = enableStreamManagement();
794 }
795 if (carbonsEnabled != null) {
796 Log.d(
797 Config.LOGTAG,
798 account.getJid().asBareJid() + ": successfully enabled carbons");
799 features.carbonsEnabled = true;
800 }
801 sendPostBindInitialization(waitForDisco, carbonsEnabled != null);
802 }
803 final HashedToken.Mechanism tokenMechanism;
804 final SaslMechanism currentMechanism = this.saslMechanism;
805 if (currentMechanism instanceof HashedToken) {
806 tokenMechanism = ((HashedToken) currentMechanism).getTokenMechanism();
807 } else if (this.hashTokenRequest != null) {
808 tokenMechanism = this.hashTokenRequest;
809 } else {
810 tokenMechanism = null;
811 }
812 if (tokenMechanism != null && !Strings.isNullOrEmpty(token)) {
813 this.account.setFastToken(tokenMechanism,token);
814 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": storing hashed token "+tokenMechanism);
815 }
816 }
817 mXmppConnectionService.databaseBackend.updateAccount(account);
818 this.quickStartInProgress = false;
819 if (version == SaslMechanism.Version.SASL) {
820 tagReader.reset();
821 sendStartStream(false, true);
822 final Tag tag = tagReader.readTag();
823 if (tag != null && tag.isStart("stream", Namespace.STREAMS)) {
824 processStream();
825 return true;
826 } else {
827 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
828 }
829 } else {
830 return false;
831 }
832 }
833
834 private void processFailure(final Element failure) throws StateChangingException {
835 final SaslMechanism.Version version;
836 try {
837 version = SaslMechanism.Version.of(failure);
838 } catch (final IllegalArgumentException e) {
839 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
840 }
841 Log.d(Config.LOGTAG,failure.toString());
842 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
843 if (this.saslMechanism instanceof HashedToken) {
844 Log.d(Config.LOGTAG,account.getJid().asBareJid() + ": resetting token");
845 account.resetFastToken();
846 mXmppConnectionService.databaseBackend.updateAccount(account);
847 }
848 if (failure.hasChild("temporary-auth-failure")) {
849 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
850 } else if (failure.hasChild("account-disabled")) {
851 final String text = failure.findChildContent("text");
852 if (Strings.isNullOrEmpty(text)) {
853 throw new StateChangingException(Account.State.UNAUTHORIZED);
854 }
855 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
856 if (matcher.find()) {
857 final HttpUrl url;
858 try {
859 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
860 } catch (final IllegalArgumentException e) {
861 throw new StateChangingException(Account.State.UNAUTHORIZED);
862 }
863 if (url.isHttps()) {
864 this.redirectionUrl = url;
865 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
866 }
867 }
868 }
869 throw new StateChangingException(Account.State.UNAUTHORIZED);
870 }
871
872 private static SSLSocket sslSocketOrNull(final Socket socket) {
873 if (socket instanceof SSLSocket) {
874 return (SSLSocket) socket;
875 } else {
876 return null;
877 }
878 }
879
880 private void processEnabled(final Element enabled) {
881 final String streamId;
882 if (enabled.getAttributeAsBoolean("resume")) {
883 streamId = enabled.getAttribute("id");
884 Log.d(
885 Config.LOGTAG,
886 account.getJid().asBareJid().toString()
887 + ": stream management enabled (resumable)");
888 } else {
889 Log.d(
890 Config.LOGTAG,
891 account.getJid().asBareJid().toString() + ": stream management enabled");
892 streamId = null;
893 }
894 this.streamId = streamId;
895 this.stanzasReceived = 0;
896 this.inSmacksSession = true;
897 final RequestPacket r = new RequestPacket();
898 tagWriter.writeStanzaAsync(r);
899 }
900
901 private void processResumed(final Element resumed) throws StateChangingException {
902 this.inSmacksSession = true;
903 this.isBound = true;
904 this.tagWriter.writeStanzaAsync(new RequestPacket());
905 lastPacketReceived = SystemClock.elapsedRealtime();
906 final String h = resumed.getAttribute("h");
907 if (h == null) {
908 resetStreamId();
909 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
910 }
911 final int serverCount;
912 try {
913 serverCount = Integer.parseInt(h);
914 } catch (final NumberFormatException e) {
915 resetStreamId();
916 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
917 }
918 final ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
919 final boolean acknowledgedMessages;
920 synchronized (this.mStanzaQueue) {
921 if (serverCount < stanzasSent) {
922 Log.d(
923 Config.LOGTAG,
924 account.getJid().asBareJid() + ": session resumed with lost packages");
925 stanzasSent = serverCount;
926 } else {
927 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": session resumed");
928 }
929 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
930 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
931 failedStanzas.add(mStanzaQueue.valueAt(i));
932 }
933 mStanzaQueue.clear();
934 }
935 if (acknowledgedMessages) {
936 mXmppConnectionService.updateConversationUi();
937 }
938 Log.d(
939 Config.LOGTAG,
940 account.getJid().asBareJid() + ": resending " + failedStanzas.size() + " stanzas");
941 for (final AbstractAcknowledgeableStanza packet : failedStanzas) {
942 if (packet instanceof MessagePacket) {
943 MessagePacket message = (MessagePacket) packet;
944 mXmppConnectionService.markMessage(
945 account,
946 message.getTo().asBareJid(),
947 message.getId(),
948 Message.STATUS_UNSEND);
949 }
950 sendPacket(packet);
951 }
952 changeStatusToOnline();
953 }
954
955 private void changeStatusToOnline() {
956 Log.d(
957 Config.LOGTAG,
958 account.getJid().asBareJid() + ": online with resource " + account.getResource());
959 changeStatus(Account.State.ONLINE);
960 }
961
962 private void processFailed(final Element failed, final boolean sendBindRequest) {
963 final int serverCount;
964 try {
965 serverCount = Integer.parseInt(failed.getAttribute("h"));
966 } catch (final NumberFormatException | NullPointerException e) {
967 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
968 resetStreamId();
969 if (sendBindRequest) {
970 sendBindRequest();
971 }
972 return;
973 }
974 Log.d(
975 Config.LOGTAG,
976 account.getJid().asBareJid()
977 + ": resumption failed but server acknowledged stanza #"
978 + serverCount);
979 final boolean acknowledgedMessages;
980 synchronized (this.mStanzaQueue) {
981 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
982 }
983 if (acknowledgedMessages) {
984 mXmppConnectionService.updateConversationUi();
985 }
986 resetStreamId();
987 if (sendBindRequest) {
988 sendBindRequest();
989 }
990 }
991
992 private boolean acknowledgeStanzaUpTo(int serverCount) {
993 if (serverCount > stanzasSent) {
994 Log.e(
995 Config.LOGTAG,
996 "server acknowledged more stanzas than we sent. serverCount="
997 + serverCount
998 + ", ourCount="
999 + stanzasSent);
1000 }
1001 boolean acknowledgedMessages = false;
1002 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1003 if (serverCount >= mStanzaQueue.keyAt(i)) {
1004 if (Config.EXTENDED_SM_LOGGING) {
1005 Log.d(
1006 Config.LOGTAG,
1007 account.getJid().asBareJid()
1008 + ": server acknowledged stanza #"
1009 + mStanzaQueue.keyAt(i));
1010 }
1011 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1012 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
1013 final MessagePacket packet = (MessagePacket) stanza;
1014 final String id = packet.getId();
1015 final Jid to = packet.getTo();
1016 if (id != null && to != null) {
1017 acknowledgedMessages |=
1018 acknowledgedListener.onMessageAcknowledged(account, to, id);
1019 }
1020 }
1021 mStanzaQueue.removeAt(i);
1022 i--;
1023 }
1024 }
1025 return acknowledgedMessages;
1026 }
1027
1028 private @NonNull Element processPacket(final Tag currentTag, final int packetType)
1029 throws IOException {
1030 final Element element;
1031 switch (packetType) {
1032 case PACKET_IQ:
1033 element = new IqPacket();
1034 break;
1035 case PACKET_MESSAGE:
1036 element = new MessagePacket();
1037 break;
1038 case PACKET_PRESENCE:
1039 element = new PresencePacket();
1040 break;
1041 default:
1042 throw new AssertionError("Should never encounter invalid type");
1043 }
1044 element.setAttributes(currentTag.getAttributes());
1045 Tag nextTag = tagReader.readTag();
1046 if (nextTag == null) {
1047 throw new IOException("interrupted mid tag");
1048 }
1049 while (!nextTag.isEnd(element.getName())) {
1050 if (!nextTag.isNo()) {
1051 element.addChild(tagReader.readElement(nextTag));
1052 }
1053 nextTag = tagReader.readTag();
1054 if (nextTag == null) {
1055 throw new IOException("interrupted mid tag");
1056 }
1057 }
1058 if (stanzasReceived == Integer.MAX_VALUE) {
1059 resetStreamId();
1060 throw new IOException("time to restart the session. cant handle >2 billion pcks");
1061 }
1062 if (inSmacksSession) {
1063 ++stanzasReceived;
1064 } else if (features.sm()) {
1065 Log.d(
1066 Config.LOGTAG,
1067 account.getJid().asBareJid()
1068 + ": not counting stanza("
1069 + element.getClass().getSimpleName()
1070 + "). Not in smacks session.");
1071 }
1072 lastPacketReceived = SystemClock.elapsedRealtime();
1073 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
1074 Log.d(Config.LOGTAG, "[background stanza] " + element);
1075 }
1076 if (element instanceof IqPacket
1077 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
1078 && element.hasChild("jingle", Namespace.JINGLE)) {
1079 return JinglePacket.upgrade((IqPacket) element);
1080 } else {
1081 return element;
1082 }
1083 }
1084
1085 private void processIq(final Tag currentTag) throws IOException {
1086 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
1087 if (!packet.valid()) {
1088 Log.e(
1089 Config.LOGTAG,
1090 "encountered invalid iq from='"
1091 + packet.getFrom()
1092 + "' to='"
1093 + packet.getTo()
1094 + "'");
1095 return;
1096 }
1097 if (packet instanceof JinglePacket) {
1098 if (this.jingleListener != null) {
1099 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
1100 }
1101 } else {
1102 OnIqPacketReceived callback = null;
1103 synchronized (this.packetCallbacks) {
1104 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple =
1105 packetCallbacks.get(packet.getId());
1106 if (packetCallbackDuple != null) {
1107 // Packets to the server should have responses from the server
1108 if (packetCallbackDuple.first.toServer(account)) {
1109 if (packet.fromServer(account)) {
1110 callback = packetCallbackDuple.second;
1111 packetCallbacks.remove(packet.getId());
1112 } else {
1113 Log.e(
1114 Config.LOGTAG,
1115 account.getJid().asBareJid().toString()
1116 + ": ignoring spoofed iq packet");
1117 }
1118 } else {
1119 if (packet.getFrom() != null
1120 && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
1121 callback = packetCallbackDuple.second;
1122 packetCallbacks.remove(packet.getId());
1123 } else {
1124 Log.e(
1125 Config.LOGTAG,
1126 account.getJid().asBareJid().toString()
1127 + ": ignoring spoofed iq packet");
1128 }
1129 }
1130 } else if (packet.getType() == IqPacket.TYPE.GET
1131 || packet.getType() == IqPacket.TYPE.SET) {
1132 callback = this.unregisteredIqListener;
1133 }
1134 }
1135 if (callback != null) {
1136 try {
1137 callback.onIqPacketReceived(account, packet);
1138 } catch (StateChangingError error) {
1139 throw new StateChangingException(error.state);
1140 }
1141 }
1142 }
1143 }
1144
1145 private void processMessage(final Tag currentTag) throws IOException {
1146 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
1147 if (!packet.valid()) {
1148 Log.e(
1149 Config.LOGTAG,
1150 "encountered invalid message from='"
1151 + packet.getFrom()
1152 + "' to='"
1153 + packet.getTo()
1154 + "'");
1155 return;
1156 }
1157 this.messageListener.onMessagePacketReceived(account, packet);
1158 }
1159
1160 private void processPresence(final Tag currentTag) throws IOException {
1161 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
1162 if (!packet.valid()) {
1163 Log.e(
1164 Config.LOGTAG,
1165 "encountered invalid presence from='"
1166 + packet.getFrom()
1167 + "' to='"
1168 + packet.getTo()
1169 + "'");
1170 return;
1171 }
1172 this.presenceListener.onPresencePacketReceived(account, packet);
1173 }
1174
1175 private void sendStartTLS() throws IOException {
1176 final Tag startTLS = Tag.empty("starttls");
1177 startTLS.setAttribute("xmlns", Namespace.TLS);
1178 tagWriter.writeTag(startTLS);
1179 }
1180
1181 private void switchOverToTls() throws XmlPullParserException, IOException {
1182 tagReader.readTag();
1183 final Socket socket = this.socket;
1184 final SSLSocket sslSocket = upgradeSocketToTls(socket);
1185 tagReader.setInputStream(sslSocket.getInputStream());
1186 tagWriter.setOutputStream(sslSocket.getOutputStream());
1187 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
1188 final boolean quickStart;
1189 try {
1190 quickStart = establishStream(SSLSockets.version(sslSocket));
1191 } catch (final InterruptedException e) {
1192 return;
1193 }
1194 if (quickStart) {
1195 this.quickStartInProgress = true;
1196 }
1197 features.encryptionEnabled = true;
1198 final Tag tag = tagReader.readTag();
1199 if (tag != null && tag.isStart("stream", Namespace.STREAMS)) {
1200 SSLSockets.log(account, sslSocket);
1201 processStream();
1202 } else {
1203 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
1204 }
1205 sslSocket.close();
1206 }
1207
1208 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
1209 final SSLSocketFactory sslSocketFactory;
1210 try {
1211 sslSocketFactory = getSSLSocketFactory();
1212 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
1213 throw new StateChangingException(Account.State.TLS_ERROR);
1214 }
1215 final InetAddress address = socket.getInetAddress();
1216 final SSLSocket sslSocket =
1217 (SSLSocket)
1218 sslSocketFactory.createSocket(
1219 socket, address.getHostAddress(), socket.getPort(), true);
1220 SSLSockets.setSecurity(sslSocket);
1221 SSLSockets.setHostname(sslSocket, IDN.toASCII(account.getServer()));
1222 SSLSockets.setApplicationProtocol(sslSocket, "xmpp-client");
1223 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
1224 try {
1225 if (!xmppDomainVerifier.verify(
1226 account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
1227 Log.d(
1228 Config.LOGTAG,
1229 account.getJid().asBareJid()
1230 + ": TLS certificate domain verification failed");
1231 FileBackend.close(sslSocket);
1232 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
1233 }
1234 } catch (final SSLPeerUnverifiedException e) {
1235 FileBackend.close(sslSocket);
1236 throw new StateChangingException(Account.State.TLS_ERROR);
1237 }
1238 return sslSocket;
1239 }
1240
1241 private void processStreamFeatures(final Tag currentTag) throws IOException {
1242 this.streamFeatures = tagReader.readElement(currentTag);
1243 final boolean isSecure =
1244 features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
1245 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
1246 if (this.quickStartInProgress) {
1247 if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)) {
1248 Log.d(
1249 Config.LOGTAG,
1250 account.getJid().asBareJid()
1251 + ": quick start in progress. ignoring features: "
1252 + XmlHelper.printElementNames(this.streamFeatures));
1253 //TODO check if 'fast' is available but we are doing something else
1254 return;
1255 }
1256 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": server lost support for SASL 2. quick start not possible");
1257 this.account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, false);
1258 mXmppConnectionService.updateAccount(account);
1259 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1260 }
1261 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
1262 && !features.encryptionEnabled) {
1263 sendStartTLS();
1264 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1265 && account.isOptionSet(Account.OPTION_REGISTER)) {
1266 if (isSecure) {
1267 register();
1268 } else {
1269 Log.d(
1270 Config.LOGTAG,
1271 account.getJid().asBareJid()
1272 + ": unable to find STARTTLS for registration process "
1273 + XmlHelper.printElementNames(this.streamFeatures));
1274 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1275 }
1276 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1277 && account.isOptionSet(Account.OPTION_REGISTER)) {
1278 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
1279 } else if (this.streamFeatures.hasChild("authentication", Namespace.SASL_2)
1280 && shouldAuthenticate
1281 && isSecure) {
1282 authenticate(SaslMechanism.Version.SASL_2);
1283 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
1284 && shouldAuthenticate
1285 && isSecure) {
1286 authenticate(SaslMechanism.Version.SASL);
1287 } else if (this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT)
1288 && streamId != null
1289 && !inSmacksSession) {
1290 if (Config.EXTENDED_SM_LOGGING) {
1291 Log.d(
1292 Config.LOGTAG,
1293 account.getJid().asBareJid()
1294 + ": resuming after stanza #"
1295 + stanzasReceived);
1296 }
1297 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived);
1298 this.mSmCatchupMessageCounter.set(0);
1299 this.mWaitingForSmCatchup.set(true);
1300 this.tagWriter.writeStanzaAsync(resume);
1301 } else if (needsBinding) {
1302 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
1303 sendBindRequest();
1304 } else {
1305 Log.d(
1306 Config.LOGTAG,
1307 account.getJid().asBareJid()
1308 + ": unable to find bind feature "
1309 + XmlHelper.printElementNames(this.streamFeatures));
1310 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1311 }
1312 } else {
1313 Log.d(
1314 Config.LOGTAG,
1315 account.getJid().asBareJid()
1316 + ": received NOP stream features "
1317 + XmlHelper.printElementNames(this.streamFeatures));
1318 }
1319 }
1320
1321 private void authenticate(final SaslMechanism.Version version) throws IOException {
1322 final Element authElement;
1323 if (version == SaslMechanism.Version.SASL) {
1324 authElement = this.streamFeatures.findChild("mechanisms", Namespace.SASL);
1325 } else {
1326 authElement = this.streamFeatures.findChild("authentication", Namespace.SASL_2);
1327 }
1328 final Collection<String> mechanisms = SaslMechanism.mechanisms(authElement);
1329 final Element cbElement =
1330 this.streamFeatures.findChild("sasl-channel-binding", Namespace.CHANNEL_BINDING);
1331 final Collection<ChannelBinding> channelBindings = ChannelBinding.of(cbElement);
1332 final SaslMechanism.Factory factory = new SaslMechanism.Factory(account);
1333 final SaslMechanism saslMechanism = factory.of(mechanisms, channelBindings, version, SSLSockets.version(this.socket));
1334 this.saslMechanism = validate(saslMechanism, mechanisms);
1335 final boolean quickStartAvailable;
1336 final String firstMessage = this.saslMechanism.getClientFirstMessage(sslSocketOrNull(this.socket));
1337 final boolean usingFast = SaslMechanism.hashedToken(this.saslMechanism);
1338 final Element authenticate;
1339 if (version == SaslMechanism.Version.SASL) {
1340 authenticate = new Element("auth", Namespace.SASL);
1341 if (!Strings.isNullOrEmpty(firstMessage)) {
1342 authenticate.setContent(firstMessage);
1343 }
1344 quickStartAvailable = false;
1345 } else if (version == SaslMechanism.Version.SASL_2) {
1346 final Element inline = authElement.findChild("inline", Namespace.SASL_2);
1347 final boolean sm = inline != null && inline.hasChild("sm", "urn:xmpp:sm:3");
1348 final HashedToken.Mechanism hashTokenRequest;
1349 if (usingFast) {
1350 hashTokenRequest = null;
1351 } else {
1352 final Element fast = inline == null ? null : inline.findChild("fast", Namespace.FAST);
1353 final Collection<String> fastMechanisms = SaslMechanism.mechanisms(fast);
1354 hashTokenRequest =
1355 HashedToken.Mechanism.best(fastMechanisms, SSLSockets.version(this.socket));
1356 }
1357 final Collection<String> bindFeatures = Bind2.features(inline);
1358 quickStartAvailable =
1359 sm
1360 && bindFeatures != null
1361 && bindFeatures.containsAll(Bind2.QUICKSTART_FEATURES);
1362 if (bindFeatures != null) {
1363 try {
1364 mXmppConnectionService.restoredFromDatabaseLatch.await();
1365 } catch (final InterruptedException e) {
1366 Log.d(
1367 Config.LOGTAG,
1368 account.getJid().asBareJid()
1369 + ": interrupted while waiting for DB restore during SASL2 bind");
1370 return;
1371 }
1372 }
1373 this.hashTokenRequest = hashTokenRequest;
1374 authenticate = generateAuthenticationRequest(firstMessage, usingFast, hashTokenRequest, bindFeatures, sm);
1375 } else {
1376 throw new AssertionError("Missing implementation for " + version);
1377 }
1378
1379 if (account.setOption(Account.OPTION_QUICKSTART_AVAILABLE, quickStartAvailable)) {
1380 mXmppConnectionService.updateAccount(account);
1381 }
1382
1383 Log.d(
1384 Config.LOGTAG,
1385 account.getJid().toString()
1386 + ": Authenticating with "
1387 + version
1388 + "/"
1389 + this.saslMechanism.getMechanism());
1390 authenticate.setAttribute("mechanism", this.saslMechanism.getMechanism());
1391 tagWriter.writeElement(authenticate);
1392 }
1393
1394 @NonNull
1395 private SaslMechanism validate(final @Nullable SaslMechanism saslMechanism, Collection<String> mechanisms) throws StateChangingException {
1396 if (saslMechanism == null) {
1397 Log.d(
1398 Config.LOGTAG,
1399 account.getJid().asBareJid()
1400 + ": unable to find supported SASL mechanism in "
1401 + mechanisms);
1402 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1403 }
1404 if (SaslMechanism.hashedToken(saslMechanism)) {
1405 return saslMechanism;
1406 }
1407 final int pinnedMechanism = account.getPinnedMechanismPriority();
1408 if (pinnedMechanism > saslMechanism.getPriority()) {
1409 Log.e(
1410 Config.LOGTAG,
1411 "Auth failed. Authentication mechanism "
1412 + saslMechanism.getMechanism()
1413 + " has lower priority ("
1414 + saslMechanism.getPriority()
1415 + ") than pinned priority ("
1416 + pinnedMechanism
1417 + "). Possible downgrade attack?");
1418 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1419 }
1420 return saslMechanism;
1421 }
1422
1423 private Element generateAuthenticationRequest(final String firstMessage, final boolean usingFast) {
1424 return generateAuthenticationRequest(firstMessage, usingFast, null, Bind2.QUICKSTART_FEATURES, true);
1425 }
1426
1427 private Element generateAuthenticationRequest(
1428 final String firstMessage,
1429 final boolean usingFast,
1430 final HashedToken.Mechanism hashedTokenRequest,
1431 final Collection<String> bind,
1432 final boolean inlineStreamManagement) {
1433 final Element authenticate = new Element("authenticate", Namespace.SASL_2);
1434 if (!Strings.isNullOrEmpty(firstMessage)) {
1435 authenticate.addChild("initial-response").setContent(firstMessage);
1436 }
1437 final Element userAgent = authenticate.addChild("user-agent");
1438 userAgent.setAttribute("id", account.getUuid());
1439 userAgent
1440 .addChild("software")
1441 .setContent(mXmppConnectionService.getString(R.string.app_name));
1442 if (!PhoneHelper.isEmulator()) {
1443 userAgent
1444 .addChild("device")
1445 .setContent(String.format("%s %s", Build.MANUFACTURER, Build.MODEL));
1446 }
1447 if (bind != null) {
1448 authenticate.addChild(generateBindRequest(bind));
1449 }
1450 if (inlineStreamManagement && streamId != null) {
1451 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived);
1452 this.mSmCatchupMessageCounter.set(0);
1453 this.mWaitingForSmCatchup.set(true);
1454 authenticate.addChild(resume);
1455 }
1456 if (hashedTokenRequest != null) {
1457 authenticate
1458 .addChild("request-token", Namespace.FAST)
1459 .setAttribute("mechanism", hashedTokenRequest.name());
1460 }
1461 if (usingFast) {
1462 authenticate.addChild("fast", Namespace.FAST);
1463 }
1464 return authenticate;
1465 }
1466
1467 private Element generateBindRequest(final Collection<String> bindFeatures) {
1468 Log.d(Config.LOGTAG, "inline bind features: " + bindFeatures);
1469 final Element bind = new Element("bind", Namespace.BIND2);
1470 bind.addChild("tag").setContent(mXmppConnectionService.getString(R.string.app_name));
1471 if (bindFeatures.contains(Namespace.CARBONS)) {
1472 bind.addChild("enable", Namespace.CARBONS);
1473 }
1474 if (bindFeatures.contains(Namespace.STREAM_MANAGEMENT)) {
1475 bind.addChild(new EnablePacket());
1476 }
1477 return bind;
1478 }
1479
1480 private void register() {
1481 final String preAuth = account.getKey(Account.KEY_PRE_AUTH_REGISTRATION_TOKEN);
1482 if (preAuth != null && features.invite()) {
1483 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1484 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1485 sendUnmodifiedIqPacket(
1486 preAuthRequest,
1487 (account, response) -> {
1488 if (response.getType() == IqPacket.TYPE.RESULT) {
1489 sendRegistryRequest();
1490 } else {
1491 final String error = response.getErrorCondition();
1492 Log.d(
1493 Config.LOGTAG,
1494 account.getJid().asBareJid()
1495 + ": failed to pre auth. "
1496 + error);
1497 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1498 }
1499 },
1500 true);
1501 } else {
1502 sendRegistryRequest();
1503 }
1504 }
1505
1506 private void sendRegistryRequest() {
1507 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1508 register.query(Namespace.REGISTER);
1509 register.setTo(account.getDomain());
1510 sendUnmodifiedIqPacket(
1511 register,
1512 (account, packet) -> {
1513 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1514 return;
1515 }
1516 if (packet.getType() == IqPacket.TYPE.ERROR) {
1517 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1518 }
1519 final Element query = packet.query(Namespace.REGISTER);
1520 if (query.hasChild("username") && (query.hasChild("password"))) {
1521 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1522 final Element username =
1523 new Element("username").setContent(account.getUsername());
1524 final Element password =
1525 new Element("password").setContent(account.getPassword());
1526 register1.query(Namespace.REGISTER).addChild(username);
1527 register1.query().addChild(password);
1528 register1.setFrom(account.getJid().asBareJid());
1529 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1530 } else if (query.hasChild("x", Namespace.DATA)) {
1531 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1532 final Element blob = query.findChild("data", "urn:xmpp:bob");
1533 final String id = packet.getId();
1534 InputStream is;
1535 if (blob != null) {
1536 try {
1537 final String base64Blob = blob.getContent();
1538 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1539 is = new ByteArrayInputStream(strBlob);
1540 } catch (Exception e) {
1541 is = null;
1542 }
1543 } else {
1544 final boolean useTor =
1545 mXmppConnectionService.useTorToConnect() || account.isOnion();
1546 try {
1547 final String url = data.getValue("url");
1548 final String fallbackUrl = data.getValue("captcha-fallback-url");
1549 if (url != null) {
1550 is = HttpConnectionManager.open(url, useTor);
1551 } else if (fallbackUrl != null) {
1552 is = HttpConnectionManager.open(fallbackUrl, useTor);
1553 } else {
1554 is = null;
1555 }
1556 } catch (final IOException e) {
1557 Log.d(
1558 Config.LOGTAG,
1559 account.getJid().asBareJid() + ": unable to fetch captcha",
1560 e);
1561 is = null;
1562 }
1563 }
1564
1565 if (is != null) {
1566 Bitmap captcha = BitmapFactory.decodeStream(is);
1567 try {
1568 if (mXmppConnectionService.displayCaptchaRequest(
1569 account, id, data, captcha)) {
1570 return;
1571 }
1572 } catch (Exception e) {
1573 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1574 }
1575 }
1576 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1577 } else if (query.hasChild("instructions")
1578 || query.hasChild("x", Namespace.OOB)) {
1579 final String instructions = query.findChildContent("instructions");
1580 final Element oob = query.findChild("x", Namespace.OOB);
1581 final String url = oob == null ? null : oob.findChildContent("url");
1582 if (url != null) {
1583 setAccountCreationFailed(url);
1584 } else if (instructions != null) {
1585 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1586 if (matcher.find()) {
1587 setAccountCreationFailed(
1588 instructions.substring(matcher.start(), matcher.end()));
1589 }
1590 }
1591 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1592 }
1593 },
1594 true);
1595 }
1596
1597 private void setAccountCreationFailed(final String url) {
1598 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1599 if (httpUrl != null && httpUrl.isHttps()) {
1600 this.redirectionUrl = httpUrl;
1601 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1602 }
1603 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1604 }
1605
1606 public HttpUrl getRedirectionUrl() {
1607 return this.redirectionUrl;
1608 }
1609
1610 public void resetEverything() {
1611 resetAttemptCount(true);
1612 resetStreamId();
1613 clearIqCallbacks();
1614 this.stanzasSent = 0;
1615 mStanzaQueue.clear();
1616 this.redirectionUrl = null;
1617 synchronized (this.disco) {
1618 disco.clear();
1619 }
1620 synchronized (this.commands) {
1621 this.commands.clear();
1622 }
1623 }
1624
1625 private void sendBindRequest() {
1626 try {
1627 mXmppConnectionService.restoredFromDatabaseLatch.await();
1628 } catch (InterruptedException e) {
1629 Log.d(
1630 Config.LOGTAG,
1631 account.getJid().asBareJid()
1632 + ": interrupted while waiting for DB restore during bind");
1633 return;
1634 }
1635 clearIqCallbacks();
1636 if (account.getJid().isBareJid()) {
1637 account.setResource(this.createNewResource());
1638 } else {
1639 fixResource(mXmppConnectionService, account);
1640 }
1641 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1642 final String resource =
1643 Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1644 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1645 this.sendUnmodifiedIqPacket(
1646 iq,
1647 (account, packet) -> {
1648 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1649 return;
1650 }
1651 final Element bind = packet.findChild("bind");
1652 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1653 isBound = true;
1654 final Element jid = bind.findChild("jid");
1655 if (jid != null && jid.getContent() != null) {
1656 try {
1657 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1658 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1659 Log.d(
1660 Config.LOGTAG,
1661 account.getJid().asBareJid()
1662 + ": server tried to re-assign domain to "
1663 + assignedJid.getDomain());
1664 throw new StateChangingError(Account.State.BIND_FAILURE);
1665 }
1666 if (account.setJid(assignedJid)) {
1667 Log.d(
1668 Config.LOGTAG,
1669 account.getJid().asBareJid()
1670 + ": jid changed during bind. updating database");
1671 mXmppConnectionService.databaseBackend.updateAccount(account);
1672 }
1673 if (streamFeatures.hasChild("session")
1674 && !streamFeatures
1675 .findChild("session")
1676 .hasChild("optional")) {
1677 sendStartSession();
1678 } else {
1679 final boolean waitForDisco = enableStreamManagement();
1680 sendPostBindInitialization(waitForDisco, false);
1681 }
1682 return;
1683 } catch (final IllegalArgumentException e) {
1684 Log.d(
1685 Config.LOGTAG,
1686 account.getJid().asBareJid()
1687 + ": server reported invalid jid ("
1688 + jid.getContent()
1689 + ") on bind");
1690 }
1691 } else {
1692 Log.d(
1693 Config.LOGTAG,
1694 account.getJid()
1695 + ": disconnecting because of bind failure. (no jid)");
1696 }
1697 } else {
1698 Log.d(
1699 Config.LOGTAG,
1700 account.getJid()
1701 + ": disconnecting because of bind failure ("
1702 + packet);
1703 }
1704 final Element error = packet.findChild("error");
1705 if (packet.getType() == IqPacket.TYPE.ERROR
1706 && error != null
1707 && error.hasChild("conflict")) {
1708 account.setResource(createNewResource());
1709 }
1710 throw new StateChangingError(Account.State.BIND_FAILURE);
1711 },
1712 true);
1713 }
1714
1715 private void clearIqCallbacks() {
1716 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1717 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1718 synchronized (this.packetCallbacks) {
1719 if (this.packetCallbacks.size() == 0) {
1720 return;
1721 }
1722 Log.d(
1723 Config.LOGTAG,
1724 account.getJid().asBareJid()
1725 + ": clearing "
1726 + this.packetCallbacks.size()
1727 + " iq callbacks");
1728 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator =
1729 this.packetCallbacks.values().iterator();
1730 while (iterator.hasNext()) {
1731 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1732 callbacks.add(entry.second);
1733 iterator.remove();
1734 }
1735 }
1736 for (OnIqPacketReceived callback : callbacks) {
1737 try {
1738 callback.onIqPacketReceived(account, failurePacket);
1739 } catch (StateChangingError error) {
1740 Log.d(
1741 Config.LOGTAG,
1742 account.getJid().asBareJid()
1743 + ": caught StateChangingError("
1744 + error.state.toString()
1745 + ") while clearing callbacks");
1746 // ignore
1747 }
1748 }
1749 Log.d(
1750 Config.LOGTAG,
1751 account.getJid().asBareJid()
1752 + ": done clearing iq callbacks. "
1753 + this.packetCallbacks.size()
1754 + " left");
1755 }
1756
1757 public void sendDiscoTimeout() {
1758 if (mWaitForDisco.compareAndSet(true, false)) {
1759 Log.d(
1760 Config.LOGTAG,
1761 account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1762 finalizeBind();
1763 }
1764 }
1765
1766 private void sendStartSession() {
1767 Log.d(
1768 Config.LOGTAG,
1769 account.getJid().asBareJid() + ": sending legacy session to outdated server");
1770 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1771 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1772 this.sendUnmodifiedIqPacket(
1773 startSession,
1774 (account, packet) -> {
1775 if (packet.getType() == IqPacket.TYPE.RESULT) {
1776 final boolean waitForDisco = enableStreamManagement();
1777 sendPostBindInitialization(waitForDisco, false);
1778 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1779 throw new StateChangingError(Account.State.SESSION_FAILURE);
1780 }
1781 },
1782 true);
1783 }
1784
1785 private boolean enableStreamManagement() {
1786 final boolean streamManagement =
1787 this.streamFeatures.hasChild("sm", Namespace.STREAM_MANAGEMENT);
1788 if (streamManagement) {
1789 synchronized (this.mStanzaQueue) {
1790 final EnablePacket enable = new EnablePacket();
1791 tagWriter.writeStanzaAsync(enable);
1792 stanzasSent = 0;
1793 mStanzaQueue.clear();
1794 }
1795 return true;
1796 } else {
1797 return false;
1798 }
1799 }
1800
1801 private void sendPostBindInitialization(
1802 final boolean waitForDisco, final boolean carbonsEnabled) {
1803 features.carbonsEnabled = carbonsEnabled;
1804 features.blockListRequested = false;
1805 synchronized (this.disco) {
1806 this.disco.clear();
1807 }
1808 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1809 mPendingServiceDiscoveries.set(0);
1810 if (!waitForDisco
1811 || Patches.DISCO_EXCEPTIONS.contains(
1812 account.getJid().getDomain().toEscapedString())) {
1813 Log.d(
1814 Config.LOGTAG,
1815 account.getJid().asBareJid() + ": do not wait for service discovery");
1816 mWaitForDisco.set(false);
1817 } else {
1818 mWaitForDisco.set(true);
1819 }
1820 lastDiscoStarted = SystemClock.elapsedRealtime();
1821 mXmppConnectionService.scheduleWakeUpCall(
1822 Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1823 final Element caps = streamFeatures.findChild("c");
1824 final String hash = caps == null ? null : caps.getAttribute("hash");
1825 final String ver = caps == null ? null : caps.getAttribute("ver");
1826 ServiceDiscoveryResult discoveryResult = null;
1827 if (hash != null && ver != null) {
1828 discoveryResult =
1829 mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1830 }
1831 final boolean requestDiscoItemsFirst =
1832 !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1833 if (requestDiscoItemsFirst) {
1834 sendServiceDiscoveryItems(account.getDomain());
1835 }
1836 if (discoveryResult == null) {
1837 sendServiceDiscoveryInfo(account.getDomain());
1838 } else {
1839 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1840 disco.put(account.getDomain(), discoveryResult);
1841 }
1842 discoverMamPreferences();
1843 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1844 if (!requestDiscoItemsFirst) {
1845 sendServiceDiscoveryItems(account.getDomain());
1846 }
1847
1848 if (!mWaitForDisco.get()) {
1849 finalizeBind();
1850 }
1851 this.lastSessionStarted = SystemClock.elapsedRealtime();
1852 }
1853
1854 private void sendServiceDiscoveryInfo(final Jid jid) {
1855 mPendingServiceDiscoveries.incrementAndGet();
1856 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1857 iq.setTo(jid);
1858 iq.query("http://jabber.org/protocol/disco#info");
1859 this.sendIqPacket(
1860 iq,
1861 (account, packet) -> {
1862 if (packet.getType() == IqPacket.TYPE.RESULT) {
1863 boolean advancedStreamFeaturesLoaded;
1864 synchronized (XmppConnection.this.disco) {
1865 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1866 if (jid.equals(account.getDomain())) {
1867 mXmppConnectionService.databaseBackend.insertDiscoveryResult(
1868 result);
1869 }
1870 disco.put(jid, result);
1871 advancedStreamFeaturesLoaded =
1872 disco.containsKey(account.getDomain())
1873 && disco.containsKey(account.getJid().asBareJid());
1874 }
1875 if (advancedStreamFeaturesLoaded
1876 && (jid.equals(account.getDomain())
1877 || jid.equals(account.getJid().asBareJid()))) {
1878 enableAdvancedStreamFeatures();
1879 }
1880 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1881 Log.d(
1882 Config.LOGTAG,
1883 account.getJid().asBareJid()
1884 + ": could not query disco info for "
1885 + jid.toString());
1886 final boolean serverOrAccount =
1887 jid.equals(account.getDomain())
1888 || jid.equals(account.getJid().asBareJid());
1889 final boolean advancedStreamFeaturesLoaded;
1890 if (serverOrAccount) {
1891 synchronized (XmppConnection.this.disco) {
1892 disco.put(jid, ServiceDiscoveryResult.empty());
1893 advancedStreamFeaturesLoaded =
1894 disco.containsKey(account.getDomain())
1895 && disco.containsKey(account.getJid().asBareJid());
1896 }
1897 } else {
1898 advancedStreamFeaturesLoaded = false;
1899 }
1900 if (advancedStreamFeaturesLoaded) {
1901 enableAdvancedStreamFeatures();
1902 }
1903 }
1904 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1905 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1906 && mWaitForDisco.compareAndSet(true, false)) {
1907 finalizeBind();
1908 }
1909 }
1910 });
1911 }
1912
1913 private void discoverMamPreferences() {
1914 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1915 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1916 sendIqPacket(
1917 request,
1918 (account, response) -> {
1919 if (response.getType() == IqPacket.TYPE.RESULT) {
1920 Element prefs =
1921 response.findChild(
1922 "prefs", MessageArchiveService.Version.MAM_2.namespace);
1923 isMamPreferenceAlways =
1924 "always"
1925 .equals(
1926 prefs == null
1927 ? null
1928 : prefs.getAttribute("default"));
1929 }
1930 });
1931 }
1932
1933 private void discoverCommands() {
1934 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1935 request.setTo(account.getDomain());
1936 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1937 sendIqPacket(
1938 request,
1939 (account, response) -> {
1940 if (response.getType() == IqPacket.TYPE.RESULT) {
1941 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1942 if (query == null) {
1943 return;
1944 }
1945 final HashMap<String, Jid> commands = new HashMap<>();
1946 for (final Element child : query.getChildren()) {
1947 if ("item".equals(child.getName())) {
1948 final String node = child.getAttribute("node");
1949 final Jid jid = child.getAttributeAsJid("jid");
1950 if (node != null && jid != null) {
1951 commands.put(node, jid);
1952 }
1953 }
1954 }
1955 synchronized (this.commands) {
1956 this.commands.clear();
1957 this.commands.putAll(commands);
1958 }
1959 }
1960 });
1961 }
1962
1963 public boolean isMamPreferenceAlways() {
1964 return isMamPreferenceAlways;
1965 }
1966
1967 private void finalizeBind() {
1968 if (bindListener != null) {
1969 bindListener.onBind(account);
1970 }
1971 changeStatusToOnline();
1972 }
1973
1974 private void enableAdvancedStreamFeatures() {
1975 if (getFeatures().blocking() && !features.blockListRequested) {
1976 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1977 this.sendIqPacket(
1978 getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1979 }
1980 for (final OnAdvancedStreamFeaturesLoaded listener :
1981 advancedStreamFeaturesLoadedListeners) {
1982 listener.onAdvancedStreamFeaturesAvailable(account);
1983 }
1984 if (getFeatures().carbons() && !features.carbonsEnabled) {
1985 sendEnableCarbons();
1986 }
1987 if (getFeatures().commands()) {
1988 discoverCommands();
1989 }
1990 }
1991
1992 private void sendServiceDiscoveryItems(final Jid server) {
1993 mPendingServiceDiscoveries.incrementAndGet();
1994 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1995 iq.setTo(server.getDomain());
1996 iq.query("http://jabber.org/protocol/disco#items");
1997 this.sendIqPacket(
1998 iq,
1999 (account, packet) -> {
2000 if (packet.getType() == IqPacket.TYPE.RESULT) {
2001 final HashSet<Jid> items = new HashSet<>();
2002 final List<Element> elements = packet.query().getChildren();
2003 for (final Element element : elements) {
2004 if (element.getName().equals("item")) {
2005 final Jid jid =
2006 InvalidJid.getNullForInvalid(
2007 element.getAttributeAsJid("jid"));
2008 if (jid != null && !jid.equals(account.getDomain())) {
2009 items.add(jid);
2010 }
2011 }
2012 }
2013 for (Jid jid : items) {
2014 sendServiceDiscoveryInfo(jid);
2015 }
2016 } else {
2017 Log.d(
2018 Config.LOGTAG,
2019 account.getJid().asBareJid()
2020 + ": could not query disco items of "
2021 + server);
2022 }
2023 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
2024 if (mPendingServiceDiscoveries.decrementAndGet() == 0
2025 && mWaitForDisco.compareAndSet(true, false)) {
2026 finalizeBind();
2027 }
2028 }
2029 });
2030 }
2031
2032 private void sendEnableCarbons() {
2033 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
2034 iq.addChild("enable", Namespace.CARBONS);
2035 this.sendIqPacket(
2036 iq,
2037 (account, packet) -> {
2038 if (packet.getType() == IqPacket.TYPE.RESULT) {
2039 Log.d(
2040 Config.LOGTAG,
2041 account.getJid().asBareJid() + ": successfully enabled carbons");
2042 features.carbonsEnabled = true;
2043 } else {
2044 Log.d(
2045 Config.LOGTAG,
2046 account.getJid().asBareJid()
2047 + ": could not enable carbons "
2048 + packet);
2049 }
2050 });
2051 }
2052
2053 private void processStreamError(final Tag currentTag) throws IOException {
2054 final Element streamError = tagReader.readElement(currentTag);
2055 if (streamError == null) {
2056 return;
2057 }
2058 if (streamError.hasChild("conflict")) {
2059 account.setResource(createNewResource());
2060 Log.d(
2061 Config.LOGTAG,
2062 account.getJid().asBareJid()
2063 + ": switching resource due to conflict ("
2064 + account.getResource()
2065 + ")");
2066 throw new IOException();
2067 } else if (streamError.hasChild("host-unknown")) {
2068 throw new StateChangingException(Account.State.HOST_UNKNOWN);
2069 } else if (streamError.hasChild("policy-violation")) {
2070 this.lastConnect = SystemClock.elapsedRealtime();
2071 final String text = streamError.findChildContent("text");
2072 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
2073 failPendingMessages(text);
2074 throw new StateChangingException(Account.State.POLICY_VIOLATION);
2075 } else {
2076 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
2077 throw new StateChangingException(Account.State.STREAM_ERROR);
2078 }
2079 }
2080
2081 private void failPendingMessages(final String error) {
2082 synchronized (this.mStanzaQueue) {
2083 for (int i = 0; i < mStanzaQueue.size(); ++i) {
2084 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
2085 if (stanza instanceof MessagePacket) {
2086 final MessagePacket packet = (MessagePacket) stanza;
2087 final String id = packet.getId();
2088 final Jid to = packet.getTo();
2089 mXmppConnectionService.markMessage(
2090 account, to.asBareJid(), id, Message.STATUS_SEND_FAILED, error);
2091 }
2092 }
2093 }
2094 }
2095
2096 private boolean establishStream(final SSLSockets.Version sslVersion)
2097 throws IOException, InterruptedException {
2098 final SaslMechanism quickStartMechanism =
2099 SaslMechanism.ensureAvailable(account.getQuickStartMechanism(), sslVersion);
2100 final boolean secureConnection = sslVersion != SSLSockets.Version.NONE;
2101 if (secureConnection
2102 && Config.QUICKSTART_ENABLED
2103 && quickStartMechanism != null
2104 && account.isOptionSet(Account.OPTION_QUICKSTART_AVAILABLE)) {
2105 mXmppConnectionService.restoredFromDatabaseLatch.await();
2106 this.saslMechanism = quickStartMechanism;
2107 final boolean usingFast = quickStartMechanism instanceof HashedToken;
2108 final Element authenticate =
2109 generateAuthenticationRequest(quickStartMechanism.getClientFirstMessage(sslSocketOrNull(this.socket)), usingFast);
2110 authenticate.setAttribute("mechanism", quickStartMechanism.getMechanism());
2111 sendStartStream(true, false);
2112 tagWriter.writeElement(authenticate);
2113 Log.d(
2114 Config.LOGTAG,
2115 account.getJid().toString()
2116 + ": quick start with "
2117 + quickStartMechanism.getMechanism());
2118 return true;
2119 } else {
2120 sendStartStream(secureConnection, true);
2121 return false;
2122 }
2123 }
2124
2125 private void sendStartStream(final boolean from, final boolean flush) throws IOException {
2126 final Tag stream = Tag.start("stream:stream");
2127 stream.setAttribute("to", account.getServer());
2128 if (from) {
2129 stream.setAttribute("from", account.getJid().asBareJid().toEscapedString());
2130 }
2131 stream.setAttribute("version", "1.0");
2132 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
2133 stream.setAttribute("xmlns", "jabber:client");
2134 stream.setAttribute("xmlns:stream", Namespace.STREAMS);
2135 tagWriter.writeTag(stream, flush);
2136 }
2137
2138 private String createNewResource() {
2139 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
2140 }
2141
2142 private String nextRandomId() {
2143 return nextRandomId(false);
2144 }
2145
2146 private String nextRandomId(final boolean s) {
2147 return CryptoHelper.random(s ? 3 : 9);
2148 }
2149
2150 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
2151 packet.setFrom(account.getJid());
2152 return this.sendUnmodifiedIqPacket(packet, callback, false);
2153 }
2154
2155 public synchronized String sendUnmodifiedIqPacket(
2156 final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
2157 if (packet.getId() == null) {
2158 packet.setAttribute("id", nextRandomId());
2159 }
2160 if (callback != null) {
2161 synchronized (this.packetCallbacks) {
2162 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
2163 }
2164 }
2165 this.sendPacket(packet, force);
2166 return packet.getId();
2167 }
2168
2169 public void sendMessagePacket(final MessagePacket packet) {
2170 this.sendPacket(packet);
2171 }
2172
2173 public void sendPresencePacket(final PresencePacket packet) {
2174 this.sendPacket(packet);
2175 }
2176
2177 private synchronized void sendPacket(final AbstractStanza packet) {
2178 sendPacket(packet, false);
2179 }
2180
2181 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
2182 if (stanzasSent == Integer.MAX_VALUE) {
2183 resetStreamId();
2184 disconnect(true);
2185 return;
2186 }
2187 synchronized (this.mStanzaQueue) {
2188 if (force || isBound) {
2189 tagWriter.writeStanzaAsync(packet);
2190 } else {
2191 Log.d(
2192 Config.LOGTAG,
2193 account.getJid().asBareJid()
2194 + " do not write stanza to unbound stream "
2195 + packet.toString());
2196 }
2197 if (packet instanceof AbstractAcknowledgeableStanza) {
2198 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
2199
2200 if (this.mStanzaQueue.size() != 0) {
2201 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
2202 if (currentHighestKey != stanzasSent) {
2203 throw new AssertionError("Stanza count messed up");
2204 }
2205 }
2206
2207 ++stanzasSent;
2208 this.mStanzaQueue.append(stanzasSent, stanza);
2209 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
2210 if (Config.EXTENDED_SM_LOGGING) {
2211 Log.d(
2212 Config.LOGTAG,
2213 account.getJid().asBareJid()
2214 + ": requesting ack for message stanza #"
2215 + stanzasSent);
2216 }
2217 tagWriter.writeStanzaAsync(new RequestPacket());
2218 }
2219 }
2220 }
2221 }
2222
2223 public void sendPing() {
2224 if (!r()) {
2225 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
2226 iq.setFrom(account.getJid());
2227 iq.addChild("ping", Namespace.PING);
2228 this.sendIqPacket(iq, null);
2229 }
2230 this.lastPingSent = SystemClock.elapsedRealtime();
2231 }
2232
2233 public void setOnMessagePacketReceivedListener(final OnMessagePacketReceived listener) {
2234 this.messageListener = listener;
2235 }
2236
2237 public void setOnUnregisteredIqPacketReceivedListener(final OnIqPacketReceived listener) {
2238 this.unregisteredIqListener = listener;
2239 }
2240
2241 public void setOnPresencePacketReceivedListener(final OnPresencePacketReceived listener) {
2242 this.presenceListener = listener;
2243 }
2244
2245 public void setOnJinglePacketReceivedListener(final OnJinglePacketReceived listener) {
2246 this.jingleListener = listener;
2247 }
2248
2249 public void setOnStatusChangedListener(final OnStatusChanged listener) {
2250 this.statusListener = listener;
2251 }
2252
2253 public void setOnBindListener(final OnBindListener listener) {
2254 this.bindListener = listener;
2255 }
2256
2257 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
2258 this.acknowledgedListener = listener;
2259 }
2260
2261 public void addOnAdvancedStreamFeaturesAvailableListener(
2262 final OnAdvancedStreamFeaturesLoaded listener) {
2263 this.advancedStreamFeaturesLoadedListeners.add(listener);
2264 }
2265
2266 private void forceCloseSocket() {
2267 FileBackend.close(this.socket);
2268 FileBackend.close(this.tagReader);
2269 }
2270
2271 public void interrupt() {
2272 if (this.mThread != null) {
2273 this.mThread.interrupt();
2274 }
2275 }
2276
2277 public void disconnect(final boolean force) {
2278 interrupt();
2279 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
2280 if (force) {
2281 forceCloseSocket();
2282 } else {
2283 final TagWriter currentTagWriter = this.tagWriter;
2284 if (currentTagWriter.isActive()) {
2285 currentTagWriter.finish();
2286 final Socket currentSocket = this.socket;
2287 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
2288 try {
2289 currentTagWriter.await(1, TimeUnit.SECONDS);
2290 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
2291 currentTagWriter.writeTag(Tag.end("stream:stream"));
2292 if (streamCountDownLatch != null) {
2293 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
2294 Log.d(
2295 Config.LOGTAG,
2296 account.getJid().asBareJid() + ": remote ended stream");
2297 } else {
2298 Log.d(
2299 Config.LOGTAG,
2300 account.getJid().asBareJid()
2301 + ": remote has not closed socket. force closing");
2302 }
2303 }
2304 } catch (InterruptedException e) {
2305 Log.d(
2306 Config.LOGTAG,
2307 account.getJid().asBareJid()
2308 + ": interrupted while gracefully closing stream");
2309 } catch (final IOException e) {
2310 Log.d(
2311 Config.LOGTAG,
2312 account.getJid().asBareJid()
2313 + ": io exception during disconnect ("
2314 + e.getMessage()
2315 + ")");
2316 } finally {
2317 FileBackend.close(currentSocket);
2318 }
2319 } else {
2320 forceCloseSocket();
2321 }
2322 }
2323 }
2324
2325 private void resetStreamId() {
2326 this.streamId = null;
2327 }
2328
2329 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
2330 synchronized (this.disco) {
2331 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
2332 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
2333 if (cursor.getValue().getFeatures().contains(feature)) {
2334 items.add(cursor);
2335 }
2336 }
2337 return items;
2338 }
2339 }
2340
2341 public Jid findDiscoItemByFeature(final String feature) {
2342 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
2343 if (items.size() >= 1) {
2344 return items.get(0).getKey();
2345 }
2346 return null;
2347 }
2348
2349 public boolean r() {
2350 if (getFeatures().sm()) {
2351 this.tagWriter.writeStanzaAsync(new RequestPacket());
2352 return true;
2353 } else {
2354 return false;
2355 }
2356 }
2357
2358 public List<String> getMucServersWithholdAccount() {
2359 final List<String> servers = getMucServers();
2360 servers.remove(account.getDomain().toEscapedString());
2361 return servers;
2362 }
2363
2364 public List<String> getMucServers() {
2365 List<String> servers = new ArrayList<>();
2366 synchronized (this.disco) {
2367 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
2368 final ServiceDiscoveryResult value = cursor.getValue();
2369 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
2370 && value.hasIdentity("conference", "text")
2371 && !value.getFeatures().contains("jabber:iq:gateway")
2372 && !value.hasIdentity("conference", "irc")) {
2373 servers.add(cursor.getKey().toString());
2374 }
2375 }
2376 }
2377 return servers;
2378 }
2379
2380 public String getMucServer() {
2381 List<String> servers = getMucServers();
2382 return servers.size() > 0 ? servers.get(0) : null;
2383 }
2384
2385 public int getTimeToNextAttempt() {
2386 final int additionalTime =
2387 account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
2388 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
2389 final int secondsSinceLast =
2390 (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
2391 return interval - secondsSinceLast;
2392 }
2393
2394 public int getAttempt() {
2395 return this.attempt;
2396 }
2397
2398 public Features getFeatures() {
2399 return this.features;
2400 }
2401
2402 public long getLastSessionEstablished() {
2403 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
2404 return System.currentTimeMillis() - diff;
2405 }
2406
2407 public long getLastConnect() {
2408 return this.lastConnect;
2409 }
2410
2411 public long getLastPingSent() {
2412 return this.lastPingSent;
2413 }
2414
2415 public long getLastDiscoStarted() {
2416 return this.lastDiscoStarted;
2417 }
2418
2419 public long getLastPacketReceived() {
2420 return this.lastPacketReceived;
2421 }
2422
2423 public void sendActive() {
2424 this.sendPacket(new ActivePacket());
2425 }
2426
2427 public void sendInactive() {
2428 this.sendPacket(new InactivePacket());
2429 }
2430
2431 public void resetAttemptCount(boolean resetConnectTime) {
2432 this.attempt = 0;
2433 if (resetConnectTime) {
2434 this.lastConnect = 0;
2435 }
2436 }
2437
2438 public void setInteractive(boolean interactive) {
2439 this.mInteractive = interactive;
2440 }
2441
2442 public Identity getServerIdentity() {
2443 synchronized (this.disco) {
2444 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
2445 if (result == null) {
2446 return Identity.UNKNOWN;
2447 }
2448 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
2449 if (id.getType().equals("im")
2450 && id.getCategory().equals("server")
2451 && id.getName() != null) {
2452 switch (id.getName()) {
2453 case "Prosody":
2454 return Identity.PROSODY;
2455 case "ejabberd":
2456 return Identity.EJABBERD;
2457 case "Slack-XMPP":
2458 return Identity.SLACK;
2459 }
2460 }
2461 }
2462 }
2463 return Identity.UNKNOWN;
2464 }
2465
2466 private IqGenerator getIqGenerator() {
2467 return mXmppConnectionService.getIqGenerator();
2468 }
2469
2470 public enum Identity {
2471 FACEBOOK,
2472 SLACK,
2473 EJABBERD,
2474 PROSODY,
2475 NIMBUZZ,
2476 UNKNOWN
2477 }
2478
2479 private class MyKeyManager implements X509KeyManager {
2480 @Override
2481 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
2482 return account.getPrivateKeyAlias();
2483 }
2484
2485 @Override
2486 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
2487 return null;
2488 }
2489
2490 @Override
2491 public X509Certificate[] getCertificateChain(String alias) {
2492 Log.d(Config.LOGTAG, "getting certificate chain");
2493 try {
2494 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
2495 } catch (final Exception e) {
2496 Log.d(Config.LOGTAG, "could not get certificate chain", e);
2497 return new X509Certificate[0];
2498 }
2499 }
2500
2501 @Override
2502 public String[] getClientAliases(String s, Principal[] principals) {
2503 final String alias = account.getPrivateKeyAlias();
2504 return alias != null ? new String[] {alias} : new String[0];
2505 }
2506
2507 @Override
2508 public String[] getServerAliases(String s, Principal[] principals) {
2509 return new String[0];
2510 }
2511
2512 @Override
2513 public PrivateKey getPrivateKey(String alias) {
2514 try {
2515 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
2516 } catch (Exception e) {
2517 return null;
2518 }
2519 }
2520 }
2521
2522 private static class StateChangingError extends Error {
2523 private final Account.State state;
2524
2525 public StateChangingError(Account.State state) {
2526 this.state = state;
2527 }
2528 }
2529
2530 private static class StateChangingException extends IOException {
2531 private final Account.State state;
2532
2533 public StateChangingException(Account.State state) {
2534 this.state = state;
2535 }
2536 }
2537
2538 public class Features {
2539 XmppConnection connection;
2540 private boolean carbonsEnabled = false;
2541 private boolean encryptionEnabled = false;
2542 private boolean blockListRequested = false;
2543
2544 public Features(final XmppConnection connection) {
2545 this.connection = connection;
2546 }
2547
2548 private boolean hasDiscoFeature(final Jid server, final String feature) {
2549 synchronized (XmppConnection.this.disco) {
2550 final ServiceDiscoveryResult sdr = connection.disco.get(server);
2551 return sdr != null && sdr.getFeatures().contains(feature);
2552 }
2553 }
2554
2555 public boolean carbons() {
2556 return hasDiscoFeature(account.getDomain(), Namespace.CARBONS);
2557 }
2558
2559 public boolean commands() {
2560 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2561 }
2562
2563 public boolean easyOnboardingInvites() {
2564 synchronized (commands) {
2565 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2566 }
2567 }
2568
2569 public boolean bookmarksConversion() {
2570 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION)
2571 && pepPublishOptions();
2572 }
2573
2574 public boolean avatarConversion() {
2575 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION)
2576 && pepPublishOptions();
2577 }
2578
2579 public boolean blocking() {
2580 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2581 }
2582
2583 public boolean spamReporting() {
2584 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
2585 }
2586
2587 public boolean flexibleOfflineMessageRetrieval() {
2588 return hasDiscoFeature(
2589 account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2590 }
2591
2592 public boolean register() {
2593 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2594 }
2595
2596 public boolean invite() {
2597 return connection.streamFeatures != null
2598 && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2599 }
2600
2601 public boolean sm() {
2602 return streamId != null
2603 || (connection.streamFeatures != null
2604 && connection.streamFeatures.hasChild("sm"));
2605 }
2606
2607 public boolean csi() {
2608 return connection.streamFeatures != null
2609 && connection.streamFeatures.hasChild("csi", Namespace.CSI);
2610 }
2611
2612 public boolean pep() {
2613 synchronized (XmppConnection.this.disco) {
2614 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2615 return info != null && info.hasIdentity("pubsub", "pep");
2616 }
2617 }
2618
2619 public boolean pepPersistent() {
2620 synchronized (XmppConnection.this.disco) {
2621 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2622 return info != null
2623 && info.getFeatures()
2624 .contains("http://jabber.org/protocol/pubsub#persistent-items");
2625 }
2626 }
2627
2628 public boolean pepPublishOptions() {
2629 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2630 }
2631
2632 public boolean pepOmemoWhitelisted() {
2633 return hasDiscoFeature(
2634 account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2635 }
2636
2637 public boolean mam() {
2638 return MessageArchiveService.Version.has(getAccountFeatures());
2639 }
2640
2641 public List<String> getAccountFeatures() {
2642 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2643 return result == null ? Collections.emptyList() : result.getFeatures();
2644 }
2645
2646 public boolean push() {
2647 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2648 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2649 }
2650
2651 public boolean rosterVersioning() {
2652 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2653 }
2654
2655 public void setBlockListRequested(boolean value) {
2656 this.blockListRequested = value;
2657 }
2658
2659 public boolean httpUpload(long filesize) {
2660 if (Config.DISABLE_HTTP_UPLOAD) {
2661 return false;
2662 } else {
2663 for (String namespace :
2664 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2665 List<Entry<Jid, ServiceDiscoveryResult>> items =
2666 findDiscoItemsByFeature(namespace);
2667 if (items.size() > 0) {
2668 try {
2669 long maxsize =
2670 Long.parseLong(
2671 items.get(0)
2672 .getValue()
2673 .getExtendedDiscoInformation(
2674 namespace, "max-file-size"));
2675 if (filesize <= maxsize) {
2676 return true;
2677 } else {
2678 Log.d(
2679 Config.LOGTAG,
2680 account.getJid().asBareJid()
2681 + ": http upload is not available for files with size "
2682 + filesize
2683 + " (max is "
2684 + maxsize
2685 + ")");
2686 return false;
2687 }
2688 } catch (Exception e) {
2689 return true;
2690 }
2691 }
2692 }
2693 return false;
2694 }
2695 }
2696
2697 public boolean useLegacyHttpUpload() {
2698 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null
2699 && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2700 }
2701
2702 public long getMaxHttpUploadSize() {
2703 for (String namespace :
2704 new String[] {Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2705 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2706 if (items.size() > 0) {
2707 try {
2708 return Long.parseLong(
2709 items.get(0)
2710 .getValue()
2711 .getExtendedDiscoInformation(namespace, "max-file-size"));
2712 } catch (Exception e) {
2713 // ignored
2714 }
2715 }
2716 }
2717 return -1;
2718 }
2719
2720 public boolean stanzaIds() {
2721 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2722 }
2723
2724 public boolean bookmarks2() {
2725 return Config
2726 .USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
2727 }
2728
2729 public boolean externalServiceDiscovery() {
2730 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2731 }
2732 }
2733}