1package eu.siacs.conversations.xmpp;
2
3import android.content.Context;
4import android.graphics.Bitmap;
5import android.graphics.BitmapFactory;
6import android.os.SystemClock;
7import android.security.KeyChain;
8import android.util.Base64;
9import android.util.Log;
10import android.util.Pair;
11import android.util.SparseArray;
12
13import androidx.annotation.NonNull;
14
15import com.google.common.base.Strings;
16
17import org.xmlpull.v1.XmlPullParserException;
18
19import java.io.ByteArrayInputStream;
20import java.io.IOException;
21import java.io.InputStream;
22import java.net.ConnectException;
23import java.net.IDN;
24import java.net.InetAddress;
25import java.net.InetSocketAddress;
26import java.net.Socket;
27import java.net.UnknownHostException;
28import java.security.KeyManagementException;
29import java.security.NoSuchAlgorithmException;
30import java.security.Principal;
31import java.security.PrivateKey;
32import java.security.cert.X509Certificate;
33import java.util.ArrayList;
34import java.util.Arrays;
35import java.util.Collections;
36import java.util.HashMap;
37import java.util.HashSet;
38import java.util.Hashtable;
39import java.util.Iterator;
40import java.util.List;
41import java.util.Map.Entry;
42import java.util.Set;
43import java.util.concurrent.CountDownLatch;
44import java.util.concurrent.TimeUnit;
45import java.util.concurrent.atomic.AtomicBoolean;
46import java.util.concurrent.atomic.AtomicInteger;
47import java.util.regex.Matcher;
48
49import javax.net.ssl.KeyManager;
50import javax.net.ssl.SSLContext;
51import javax.net.ssl.SSLPeerUnverifiedException;
52import javax.net.ssl.SSLSocket;
53import javax.net.ssl.SSLSocketFactory;
54import javax.net.ssl.X509KeyManager;
55import javax.net.ssl.X509TrustManager;
56
57import eu.siacs.conversations.Config;
58import eu.siacs.conversations.R;
59import eu.siacs.conversations.crypto.XmppDomainVerifier;
60import eu.siacs.conversations.crypto.axolotl.AxolotlService;
61import eu.siacs.conversations.crypto.sasl.Anonymous;
62import eu.siacs.conversations.crypto.sasl.DigestMd5;
63import eu.siacs.conversations.crypto.sasl.External;
64import eu.siacs.conversations.crypto.sasl.Plain;
65import eu.siacs.conversations.crypto.sasl.SaslMechanism;
66import eu.siacs.conversations.crypto.sasl.ScramSha1;
67import eu.siacs.conversations.crypto.sasl.ScramSha256;
68import eu.siacs.conversations.crypto.sasl.ScramSha512;
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.Resolver;
82import eu.siacs.conversations.utils.SSLSocketHelper;
83import eu.siacs.conversations.utils.SocksSocketFactory;
84import eu.siacs.conversations.utils.XmlHelper;
85import eu.siacs.conversations.xml.Element;
86import eu.siacs.conversations.xml.LocalizedContent;
87import eu.siacs.conversations.xml.Namespace;
88import eu.siacs.conversations.xml.Tag;
89import eu.siacs.conversations.xml.TagWriter;
90import eu.siacs.conversations.xml.XmlReader;
91import eu.siacs.conversations.xmpp.forms.Data;
92import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
93import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
94import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
95import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
96import eu.siacs.conversations.xmpp.stanzas.IqPacket;
97import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
98import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
99import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
100import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
101import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
102import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
103import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
104import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
105import okhttp3.HttpUrl;
106
107public class XmppConnection implements Runnable {
108
109 private static final int PACKET_IQ = 0;
110 private static final int PACKET_MESSAGE = 1;
111 private static final int PACKET_PRESENCE = 2;
112 public final OnIqPacketReceived registrationResponseListener = (account, packet) -> {
113 if (packet.getType() == IqPacket.TYPE.RESULT) {
114 account.setOption(Account.OPTION_REGISTER, false);
115 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": successfully registered new account on server");
116 throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL);
117 } else {
118 final List<String> PASSWORD_TOO_WEAK_MSGS = Arrays.asList(
119 "The password is too weak",
120 "Please use a longer password.");
121 Element error = packet.findChild("error");
122 Account.State state = Account.State.REGISTRATION_FAILED;
123 if (error != null) {
124 if (error.hasChild("conflict")) {
125 state = Account.State.REGISTRATION_CONFLICT;
126 } else if (error.hasChild("resource-constraint")
127 && "wait".equals(error.getAttribute("type"))) {
128 state = Account.State.REGISTRATION_PLEASE_WAIT;
129 } else if (error.hasChild("not-acceptable")
130 && PASSWORD_TOO_WEAK_MSGS.contains(error.findChildContent("text"))) {
131 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
132 }
133 }
134 throw new StateChangingError(state);
135 }
136 };
137 protected final Account account;
138 private final Features features = new Features(this);
139 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
140 private final HashMap<String, Jid> commands = new HashMap<>();
141 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
142 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
143 private final Set<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new HashSet<>();
144 private final XmppConnectionService mXmppConnectionService;
145 private Socket socket;
146 private XmlReader tagReader;
147 private TagWriter tagWriter = new TagWriter();
148 private boolean shouldAuthenticate = true;
149 private boolean inSmacksSession = false;
150 private boolean isBound = false;
151 private Element streamFeatures;
152 private String streamId = null;
153 private int smVersion = 3;
154 private int stanzasReceived = 0;
155 private int stanzasSent = 0;
156 private long lastPacketReceived = 0;
157 private long lastPingSent = 0;
158 private long lastConnect = 0;
159 private long lastSessionStarted = 0;
160 private long lastDiscoStarted = 0;
161 private boolean isMamPreferenceAlways = false;
162 private final AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
163 private final AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
164 private final AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
165 private final AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
166 private boolean mInteractive = false;
167 private int attempt = 0;
168 private OnPresencePacketReceived presenceListener = null;
169 private OnJinglePacketReceived jingleListener = null;
170 private OnIqPacketReceived unregisteredIqListener = null;
171 private OnMessagePacketReceived messageListener = null;
172 private OnStatusChanged statusListener = null;
173 private OnBindListener bindListener = null;
174 private OnMessageAcknowledged acknowledgedListener = null;
175 private SaslMechanism saslMechanism;
176 private HttpUrl redirectionUrl = null;
177 private String verifiedHostname = null;
178 private volatile Thread mThread;
179 private CountDownLatch mStreamCountDownLatch;
180
181
182 public XmppConnection(final Account account, final XmppConnectionService service) {
183 this.account = account;
184 this.mXmppConnectionService = service;
185 }
186
187 private static void fixResource(Context context, Account account) {
188 String resource = account.getResource();
189 int fixedPartLength = context.getString(R.string.app_name).length() + 1; //include the trailing dot
190 int randomPartLength = 4; // 3 bytes
191 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
192 if (validBase64(resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
193 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
194 }
195 }
196 }
197
198 private static boolean validBase64(String input) {
199 try {
200 return Base64.decode(input, Base64.URL_SAFE).length == 3;
201 } catch (Throwable throwable) {
202 return false;
203 }
204 }
205
206 private void changeStatus(final Account.State nextStatus) {
207 synchronized (this) {
208 if (Thread.currentThread().isInterrupted()) {
209 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not changing status to " + nextStatus + " because thread was interrupted");
210 return;
211 }
212 if (account.getStatus() != nextStatus) {
213 if ((nextStatus == Account.State.OFFLINE)
214 && (account.getStatus() != Account.State.CONNECTING)
215 && (account.getStatus() != Account.State.ONLINE)
216 && (account.getStatus() != Account.State.DISABLED)) {
217 return;
218 }
219 if (nextStatus == Account.State.ONLINE) {
220 this.attempt = 0;
221 }
222 account.setStatus(nextStatus);
223 } else {
224 return;
225 }
226 }
227 if (statusListener != null) {
228 statusListener.onStatusChanged(account);
229 }
230 }
231
232 public Jid getJidForCommand(final String node) {
233 synchronized (this.commands) {
234 return this.commands.get(node);
235 }
236 }
237
238 public void prepareNewConnection() {
239 this.lastConnect = SystemClock.elapsedRealtime();
240 this.lastPingSent = SystemClock.elapsedRealtime();
241 this.lastDiscoStarted = Long.MAX_VALUE;
242 this.mWaitingForSmCatchup.set(false);
243 this.changeStatus(Account.State.CONNECTING);
244 }
245
246 public boolean isWaitingForSmCatchup() {
247 return mWaitingForSmCatchup.get();
248 }
249
250 public void incrementSmCatchupMessageCounter() {
251 this.mSmCatchupMessageCounter.incrementAndGet();
252 }
253
254 protected void connect() {
255 if (mXmppConnectionService.areMessagesInitialized()) {
256 mXmppConnectionService.resetSendingToWaiting(account);
257 }
258 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
259 features.encryptionEnabled = false;
260 inSmacksSession = false;
261 isBound = false;
262 this.attempt++;
263 this.verifiedHostname = null; //will be set if user entered hostname is being used or hostname was verified with dnssec
264 try {
265 Socket localSocket;
266 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
267 this.changeStatus(Account.State.CONNECTING);
268 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
269 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
270 if (useTor) {
271 String destination;
272 if (account.getHostname().isEmpty() || account.isOnion()) {
273 destination = account.getServer();
274 } else {
275 destination = account.getHostname();
276 this.verifiedHostname = destination;
277 }
278
279 final int port = account.getPort();
280 final boolean directTls = Resolver.useDirectTls(port);
281
282 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": connect to " + destination + " via Tor. directTls=" + directTls);
283 localSocket = SocksSocketFactory.createSocketOverTor(destination, port);
284
285 if (directTls) {
286 localSocket = upgradeSocketToTls(localSocket);
287 features.encryptionEnabled = true;
288 }
289
290 try {
291 startXmpp(localSocket);
292 } catch (InterruptedException e) {
293 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
294 return;
295 } catch (Exception e) {
296 throw new IOException(e.getMessage());
297 }
298 } else {
299 final String domain = account.getServer();
300 final List<Resolver.Result> results;
301 final boolean hardcoded = extended && !account.getHostname().isEmpty();
302 if (hardcoded) {
303 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
304 } else {
305 results = Resolver.resolve(domain);
306 }
307 if (Thread.currentThread().isInterrupted()) {
308 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
309 return;
310 }
311 if (results.size() == 0) {
312 Log.e(Config.LOGTAG, account.getJid().asBareJid() + ": Resolver results were empty");
313 return;
314 }
315 final Resolver.Result storedBackupResult;
316 if (hardcoded) {
317 storedBackupResult = null;
318 } else {
319 storedBackupResult = mXmppConnectionService.databaseBackend.findResolverResult(domain);
320 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
321 results.add(storedBackupResult);
322 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": loaded backup resolver result from db: " + storedBackupResult);
323 }
324 }
325 for (Iterator<Resolver.Result> iterator = results.iterator(); iterator.hasNext(); ) {
326 final Resolver.Result result = iterator.next();
327 if (Thread.currentThread().isInterrupted()) {
328 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
329 return;
330 }
331 try {
332 // if tls is true, encryption is implied and must not be started
333 features.encryptionEnabled = result.isDirectTls();
334 verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
335 Log.d(Config.LOGTAG, "verified hostname " + verifiedHostname);
336 final InetSocketAddress addr;
337 if (result.getIp() != null) {
338 addr = new InetSocketAddress(result.getIp(), result.getPort());
339 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
340 + ": using values from resolver " + (result.getHostname() == null ? "" : result.getHostname().toString()
341 + "/") + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
342 } else {
343 addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort());
344 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
345 + ": using values from resolver "
346 + result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
347 }
348
349 localSocket = new Socket();
350 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
351
352 if (features.encryptionEnabled) {
353 localSocket = upgradeSocketToTls(localSocket);
354 }
355
356 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
357 if (startXmpp(localSocket)) {
358 localSocket.setSoTimeout(0); //reset to 0; once the connection is established we don’t want this
359 if (!hardcoded && !result.equals(storedBackupResult)) {
360 mXmppConnectionService.databaseBackend.saveResolverResult(domain, result);
361 }
362 break; // successfully connected to server that speaks xmpp
363 } else {
364 FileBackend.close(localSocket);
365 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
366 }
367 } catch (final StateChangingException e) {
368 if (!iterator.hasNext()) {
369 throw e;
370 }
371 } catch (InterruptedException e) {
372 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
373 return;
374 } catch (final Throwable e) {
375 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
376 if (!iterator.hasNext()) {
377 throw new UnknownHostException();
378 }
379 }
380 }
381 }
382 processStream();
383 } catch (final SecurityException e) {
384 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
385 } catch (final StateChangingException e) {
386 this.changeStatus(e.state);
387 } catch (final UnknownHostException | ConnectException | SocksSocketFactory.HostNotFoundException e) {
388 this.changeStatus(Account.State.SERVER_NOT_FOUND);
389 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
390 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
391 } catch (final IOException | XmlPullParserException e) {
392 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
393 this.changeStatus(Account.State.OFFLINE);
394 this.attempt = Math.max(0, this.attempt - 1);
395 } finally {
396 if (!Thread.currentThread().isInterrupted()) {
397 forceCloseSocket();
398 } else {
399 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not force closing socket because thread was interrupted");
400 }
401 }
402 }
403
404 /**
405 * Starts xmpp protocol, call after connecting to socket
406 *
407 * @return true if server returns with valid xmpp, false otherwise
408 */
409 private boolean startXmpp(Socket socket) throws Exception {
410 if (Thread.currentThread().isInterrupted()) {
411 throw new InterruptedException();
412 }
413 this.socket = socket;
414 tagReader = new XmlReader();
415 if (tagWriter != null) {
416 tagWriter.forceClose();
417 }
418 tagWriter = new TagWriter();
419 tagWriter.setOutputStream(socket.getOutputStream());
420 tagReader.setInputStream(socket.getInputStream());
421 tagWriter.beginDocument();
422 sendStartStream();
423 final Tag tag = tagReader.readTag();
424 if (Thread.currentThread().isInterrupted()) {
425 throw new InterruptedException();
426 }
427 if (socket instanceof SSLSocket) {
428 SSLSocketHelper.log(account, (SSLSocket) socket);
429 }
430 return tag != null && tag.isStart("stream");
431 }
432
433 private SSLSocketFactory getSSLSocketFactory() throws NoSuchAlgorithmException, KeyManagementException {
434 final SSLContext sc = SSLSocketHelper.getSSLContext();
435 final MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
436 final KeyManager[] keyManager;
437 if (account.getPrivateKeyAlias() != null) {
438 keyManager = new KeyManager[]{new MyKeyManager()};
439 } else {
440 keyManager = null;
441 }
442 final String domain = account.getServer();
443 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
444 return sc.getSocketFactory();
445 }
446
447 @Override
448 public void run() {
449 synchronized (this) {
450 this.mThread = Thread.currentThread();
451 if (this.mThread.isInterrupted()) {
452 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": aborting connect because thread was interrupted");
453 return;
454 }
455 forceCloseSocket();
456 }
457 connect();
458 }
459
460 private void processStream() throws XmlPullParserException, IOException {
461 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
462 this.mStreamCountDownLatch = streamCountDownLatch;
463 Tag nextTag = tagReader.readTag();
464 while (nextTag != null && !nextTag.isEnd("stream")) {
465 if (nextTag.isStart("error")) {
466 processStreamError(nextTag);
467 } else if (nextTag.isStart("features")) {
468 processStreamFeatures(nextTag);
469 } else if (nextTag.isStart("proceed", Namespace.TLS)) {
470 switchOverToTls();
471 } else if (nextTag.isStart("success")) {
472 final Element success = tagReader.readElement(nextTag);
473 if (processSuccess(success)) {
474 break;
475 }
476
477 } else if (nextTag.isStart("failure", Namespace.TLS)) {
478 throw new StateChangingException(Account.State.TLS_ERROR);
479 } else if (nextTag.isStart("failure")) {
480 final Element failure = tagReader.readElement(nextTag);
481 final SaslMechanism.Version version;
482 try {
483 version = SaslMechanism.Version.of(failure);
484 } catch (final IllegalArgumentException e) {
485 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
486 }
487 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
488 if (failure.hasChild("temporary-auth-failure")) {
489 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
490 } else if (failure.hasChild("account-disabled")) {
491 final String text = failure.findChildContent("text");
492 if (Strings.isNullOrEmpty(text)) {
493 throw new StateChangingException(Account.State.UNAUTHORIZED);
494 }
495 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
496 if (matcher.find()) {
497 final HttpUrl url;
498 try {
499 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
500 } catch (final IllegalArgumentException e) {
501 throw new StateChangingException(Account.State.UNAUTHORIZED);
502 }
503 if (url.isHttps()) {
504 this.redirectionUrl = url;
505 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
506 }
507 }
508 }
509 throw new StateChangingException(Account.State.UNAUTHORIZED);
510 } else if (nextTag.isStart("continue", Namespace.SASL_2)) {
511 throw new StateChangingException(Account.State.INCOMPATIBLE_CLIENT);
512 } else if (nextTag.isStart("challenge")) {
513 final Element challenge = tagReader.readElement(nextTag);
514 final SaslMechanism.Version version;
515 try {
516 version = SaslMechanism.Version.of(challenge);
517 } catch (final IllegalArgumentException e) {
518 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
519 }
520 final Element response;
521 if (version == SaslMechanism.Version.SASL) {
522 response = new Element("response", Namespace.SASL);
523 } else if (version == SaslMechanism.Version.SASL_2) {
524 response = new Element("response", Namespace.SASL_2);
525 } else {
526 throw new AssertionError("Missing implementation for " + version);
527 }
528 try {
529 response.setContent(saslMechanism.getResponse(challenge.getContent()));
530 } catch (final SaslMechanism.AuthenticationException e) {
531 // TODO: Send auth abort tag.
532 Log.e(Config.LOGTAG, e.toString());
533 throw new StateChangingException(Account.State.UNAUTHORIZED);
534 }
535 tagWriter.writeElement(response);
536 } else if (nextTag.isStart("enabled")) {
537 final Element enabled = tagReader.readElement(nextTag);
538 if (enabled.getAttributeAsBoolean("resume")) {
539 this.streamId = enabled.getAttribute("id");
540 Log.d(
541 Config.LOGTAG,
542 account.getJid().asBareJid().toString()
543 + ": stream management("
544 + smVersion
545 + ") enabled (resumable)");
546 } else {
547 Log.d(
548 Config.LOGTAG,
549 account.getJid().asBareJid().toString()
550 + ": stream management("
551 + smVersion
552 + ") enabled");
553 }
554 this.stanzasReceived = 0;
555 this.inSmacksSession = true;
556 final RequestPacket r = new RequestPacket(smVersion);
557 tagWriter.writeStanzaAsync(r);
558 } else if (nextTag.isStart("resumed")) {
559 final Element resumed = tagReader.readElement(nextTag);
560 processResumed(resumed);
561 } else if (nextTag.isStart("r")) {
562 tagReader.readElement(nextTag);
563 if (Config.EXTENDED_SM_LOGGING) {
564 Log.d(
565 Config.LOGTAG,
566 account.getJid().asBareJid()
567 + ": acknowledging stanza #"
568 + this.stanzasReceived);
569 }
570 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
571 tagWriter.writeStanzaAsync(ack);
572 } else if (nextTag.isStart("a")) {
573 boolean accountUiNeedsRefresh = false;
574 synchronized (NotificationService.CATCHUP_LOCK) {
575 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
576 final int messageCount = mSmCatchupMessageCounter.get();
577 final int pendingIQs = packetCallbacks.size();
578 Log.d(
579 Config.LOGTAG,
580 account.getJid().asBareJid()
581 + ": SM catchup complete (messages="
582 + messageCount
583 + ", pending IQs="
584 + pendingIQs
585 + ")");
586 accountUiNeedsRefresh = true;
587 if (messageCount > 0) {
588 mXmppConnectionService
589 .getNotificationService()
590 .finishBacklog(true, account);
591 }
592 }
593 }
594 if (accountUiNeedsRefresh) {
595 mXmppConnectionService.updateAccountUi();
596 }
597 final Element ack = tagReader.readElement(nextTag);
598 lastPacketReceived = SystemClock.elapsedRealtime();
599 try {
600 final boolean acknowledgedMessages;
601 synchronized (this.mStanzaQueue) {
602 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
603 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
604 }
605 if (acknowledgedMessages) {
606 mXmppConnectionService.updateConversationUi();
607 }
608 } catch (NumberFormatException | NullPointerException e) {
609 Log.d(
610 Config.LOGTAG,
611 account.getJid().asBareJid()
612 + ": server send ack without sequence number");
613 }
614 } else if (nextTag.isStart("failed")) {
615 final Element failed = tagReader.readElement(nextTag);
616 processFailed(failed, true);
617 } else if (nextTag.isStart("iq")) {
618 processIq(nextTag);
619 } else if (nextTag.isStart("message")) {
620 processMessage(nextTag);
621 } else if (nextTag.isStart("presence")) {
622 processPresence(nextTag);
623 }
624 nextTag = tagReader.readTag();
625 }
626 if (nextTag != null && nextTag.isEnd("stream")) {
627 streamCountDownLatch.countDown();
628 }
629 }
630
631 private boolean processSuccess(final Element success) throws IOException, XmlPullParserException {
632 final SaslMechanism.Version version;
633 try {
634 version = SaslMechanism.Version.of(success);
635 } catch (final IllegalArgumentException e) {
636 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
637 }
638 final String challenge;
639 if (version == SaslMechanism.Version.SASL) {
640 challenge = success.getContent();
641 } else if (version == SaslMechanism.Version.SASL_2) {
642 challenge = success.findChildContent("additional-data");
643 } else {
644 throw new AssertionError("Missing implementation for " + version);
645 }
646 try {
647 saslMechanism.getResponse(challenge);
648 } catch (final SaslMechanism.AuthenticationException e) {
649 Log.e(Config.LOGTAG, String.valueOf(e));
650 throw new StateChangingException(Account.State.UNAUTHORIZED);
651 }
652 Log.d(
653 Config.LOGTAG,
654 account.getJid().asBareJid().toString()
655 + ": logged in (using "
656 + version
657 + ")");
658 account.setKey(
659 Account.PINNED_MECHANISM_KEY, String.valueOf(saslMechanism.getPriority()));
660 if (version == SaslMechanism.Version.SASL_2) {
661 final String authorizationIdentifier =
662 success.findChildContent("authorization-identifier");
663 final Jid authorizationJid;
664 try {
665 authorizationJid = Strings.isNullOrEmpty(authorizationIdentifier) ? null : Jid.ofEscaped(authorizationIdentifier);
666 } catch (final IllegalArgumentException e) {
667 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": SASL 2.0 authorization identifier was not a valid jid");
668 throw new StateChangingException(Account.State.BIND_FAILURE);
669 }
670 if (authorizationJid == null) {
671 throw new StateChangingException(Account.State.BIND_FAILURE);
672 }
673 Log.d(
674 Config.LOGTAG,
675 account.getJid().asBareJid()
676 + ": SASL 2.0 authorization identifier was "
677 + authorizationJid);
678 if (!account.getJid().getDomain().equals(authorizationJid.getDomain())) {
679 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + authorizationJid.getDomain());
680 throw new StateChangingError(Account.State.BIND_FAILURE);
681 }
682 if (authorizationJid.isFullJid() && account.setJid(authorizationJid)) {
683 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during SASL 2.0. updating database");
684 mXmppConnectionService.databaseBackend.updateAccount(account);
685 }
686 final Element resumed = success.findChild("resumed", "urn:xmpp:sm:3");
687 final Element failed = success.findChild("failed", "urn:xmpp:sm:3");
688 if (resumed != null && streamId != null) {
689 processResumed(resumed);
690 } else if (failed != null) {
691 processFailed(failed, false); // wait for new stream features
692 }
693 }
694 if (version == SaslMechanism.Version.SASL) {
695 tagReader.reset();
696 sendStartStream();
697 final Tag tag = tagReader.readTag();
698 if (tag != null && tag.isStart("stream")) {
699 processStream();
700 return true;
701 } else {
702 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
703 }
704 } else {
705 return false;
706 }
707 }
708
709 private void processResumed(final Element resumed) throws StateChangingException {
710 this.inSmacksSession = true;
711 this.isBound = true;
712 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
713 lastPacketReceived = SystemClock.elapsedRealtime();
714 final String h = resumed.getAttribute("h");
715 if (h == null) {
716 resetStreamId();
717 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
718 }
719 final int serverCount;
720 try {
721 serverCount = Integer.parseInt(h);
722 } catch (final NumberFormatException e) {
723 resetStreamId();
724 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
725 }
726 final ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
727 final boolean acknowledgedMessages;
728 synchronized (this.mStanzaQueue) {
729 if (serverCount < stanzasSent) {
730 Log.d(
731 Config.LOGTAG,
732 account.getJid().asBareJid() + ": session resumed with lost packages");
733 stanzasSent = serverCount;
734 } else {
735 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": session resumed");
736 }
737 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
738 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
739 failedStanzas.add(mStanzaQueue.valueAt(i));
740 }
741 mStanzaQueue.clear();
742 }
743 if (acknowledgedMessages) {
744 mXmppConnectionService.updateConversationUi();
745 }
746 Log.d(
747 Config.LOGTAG,
748 account.getJid().asBareJid() + ": resending " + failedStanzas.size() + " stanzas");
749 for (final AbstractAcknowledgeableStanza packet : failedStanzas) {
750 if (packet instanceof MessagePacket) {
751 MessagePacket message = (MessagePacket) packet;
752 mXmppConnectionService.markMessage(
753 account,
754 message.getTo().asBareJid(),
755 message.getId(),
756 Message.STATUS_UNSEND);
757 }
758 sendPacket(packet);
759 }
760 Log.d(
761 Config.LOGTAG,
762 account.getJid().asBareJid() + ": online with resource " + account.getResource());
763 changeStatus(Account.State.ONLINE);
764 }
765
766 private void processFailed(final Element failed, final boolean sendBindRequest) {
767 final int serverCount;
768 try {
769 serverCount = Integer.parseInt(failed.getAttribute("h"));
770 } catch (final NumberFormatException | NullPointerException e) {
771 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
772 resetStreamId();
773 if (sendBindRequest) {
774 sendBindRequest();
775 }
776 return;
777 }
778 Log.d(
779 Config.LOGTAG,
780 account.getJid().asBareJid()
781 + ": resumption failed but server acknowledged stanza #"
782 + serverCount);
783 final boolean acknowledgedMessages;
784 synchronized (this.mStanzaQueue) {
785 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
786 }
787 if (acknowledgedMessages) {
788 mXmppConnectionService.updateConversationUi();
789 }
790 resetStreamId();
791 if (sendBindRequest) {
792 sendBindRequest();
793 }
794 }
795
796 private boolean acknowledgeStanzaUpTo(int serverCount) {
797 if (serverCount > stanzasSent) {
798 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
799 }
800 boolean acknowledgedMessages = false;
801 for (int i = 0; i < mStanzaQueue.size(); ++i) {
802 if (serverCount >= mStanzaQueue.keyAt(i)) {
803 if (Config.EXTENDED_SM_LOGGING) {
804 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
805 }
806 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
807 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
808 final MessagePacket packet = (MessagePacket) stanza;
809 final String id = packet.getId();
810 final Jid to = packet.getTo();
811 if (id != null && to != null) {
812 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, to, id);
813 }
814 }
815 mStanzaQueue.removeAt(i);
816 i--;
817 }
818 }
819 return acknowledgedMessages;
820 }
821
822 private @NonNull
823 Element processPacket(final Tag currentTag, final int packetType) throws IOException {
824 final Element element;
825 switch (packetType) {
826 case PACKET_IQ:
827 element = new IqPacket();
828 break;
829 case PACKET_MESSAGE:
830 element = new MessagePacket();
831 break;
832 case PACKET_PRESENCE:
833 element = new PresencePacket();
834 break;
835 default:
836 throw new AssertionError("Should never encounter invalid type");
837 }
838 element.setAttributes(currentTag.getAttributes());
839 Tag nextTag = tagReader.readTag();
840 if (nextTag == null) {
841 throw new IOException("interrupted mid tag");
842 }
843 while (!nextTag.isEnd(element.getName())) {
844 if (!nextTag.isNo()) {
845 element.addChild(tagReader.readElement(nextTag));
846 }
847 nextTag = tagReader.readTag();
848 if (nextTag == null) {
849 throw new IOException("interrupted mid tag");
850 }
851 }
852 if (stanzasReceived == Integer.MAX_VALUE) {
853 resetStreamId();
854 throw new IOException("time to restart the session. cant handle >2 billion pcks");
855 }
856 if (inSmacksSession) {
857 ++stanzasReceived;
858 } else if (features.sm()) {
859 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
860 }
861 lastPacketReceived = SystemClock.elapsedRealtime();
862 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
863 Log.d(Config.LOGTAG, "[background stanza] " + element);
864 }
865 if (element instanceof IqPacket
866 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
867 && element.hasChild("jingle", Namespace.JINGLE)) {
868 return JinglePacket.upgrade((IqPacket) element);
869 } else {
870 return element;
871 }
872 }
873
874 private void processIq(final Tag currentTag) throws IOException {
875 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
876 if (!packet.valid()) {
877 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
878 return;
879 }
880 if (packet instanceof JinglePacket) {
881 if (this.jingleListener != null) {
882 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
883 }
884 } else {
885 OnIqPacketReceived callback = null;
886 synchronized (this.packetCallbacks) {
887 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
888 if (packetCallbackDuple != null) {
889 // Packets to the server should have responses from the server
890 if (packetCallbackDuple.first.toServer(account)) {
891 if (packet.fromServer(account)) {
892 callback = packetCallbackDuple.second;
893 packetCallbacks.remove(packet.getId());
894 } else {
895 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
896 }
897 } else {
898 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
899 callback = packetCallbackDuple.second;
900 packetCallbacks.remove(packet.getId());
901 } else {
902 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
903 }
904 }
905 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
906 callback = this.unregisteredIqListener;
907 }
908 }
909 if (callback != null) {
910 try {
911 callback.onIqPacketReceived(account, packet);
912 } catch (StateChangingError error) {
913 throw new StateChangingException(error.state);
914 }
915 }
916 }
917 }
918
919 private void processMessage(final Tag currentTag) throws IOException {
920 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
921 if (!packet.valid()) {
922 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
923 return;
924 }
925 this.messageListener.onMessagePacketReceived(account, packet);
926 }
927
928 private void processPresence(final Tag currentTag) throws IOException {
929 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
930 if (!packet.valid()) {
931 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
932 return;
933 }
934 this.presenceListener.onPresencePacketReceived(account, packet);
935 }
936
937 private void sendStartTLS() throws IOException {
938 final Tag startTLS = Tag.empty("starttls");
939 startTLS.setAttribute("xmlns", Namespace.TLS);
940 tagWriter.writeTag(startTLS);
941 }
942
943 private void switchOverToTls() throws XmlPullParserException, IOException {
944 tagReader.readTag();
945 final Socket socket = this.socket;
946 final SSLSocket sslSocket = upgradeSocketToTls(socket);
947 tagReader.setInputStream(sslSocket.getInputStream());
948 tagWriter.setOutputStream(sslSocket.getOutputStream());
949 sendStartStream();
950 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
951 features.encryptionEnabled = true;
952 final Tag tag = tagReader.readTag();
953 if (tag != null && tag.isStart("stream")) {
954 SSLSocketHelper.log(account, sslSocket);
955 processStream();
956 } else {
957 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
958 }
959 sslSocket.close();
960 }
961
962 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
963 final SSLSocketFactory sslSocketFactory;
964 try {
965 sslSocketFactory = getSSLSocketFactory();
966 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
967 throw new StateChangingException(Account.State.TLS_ERROR);
968 }
969 final InetAddress address = socket.getInetAddress();
970 final SSLSocket sslSocket = (SSLSocket) sslSocketFactory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
971 SSLSocketHelper.setSecurity(sslSocket);
972 SSLSocketHelper.setHostname(sslSocket, IDN.toASCII(account.getServer()));
973 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
974 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
975 try {
976 if (!xmppDomainVerifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
977 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate domain verification failed");
978 FileBackend.close(sslSocket);
979 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
980 }
981 } catch (final SSLPeerUnverifiedException e) {
982 FileBackend.close(sslSocket);
983 throw new StateChangingException(Account.State.TLS_ERROR);
984 }
985 return sslSocket;
986 }
987
988 private void processStreamFeatures(final Tag currentTag) throws IOException {
989 this.streamFeatures = tagReader.readElement(currentTag);
990 final boolean isSecure =
991 features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
992 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
993 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
994 && !features.encryptionEnabled) {
995 sendStartTLS();
996 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
997 && account.isOptionSet(Account.OPTION_REGISTER)) {
998 if (isSecure) {
999 register();
1000 } else {
1001 Log.d(
1002 Config.LOGTAG,
1003 account.getJid().asBareJid()
1004 + ": unable to find STARTTLS for registration process "
1005 + XmlHelper.printElementNames(this.streamFeatures));
1006 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1007 }
1008 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
1009 && account.isOptionSet(Account.OPTION_REGISTER)) {
1010 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
1011 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL_2)
1012 && shouldAuthenticate
1013 && isSecure) {
1014 authenticate(SaslMechanism.Version.SASL_2);
1015 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
1016 && shouldAuthenticate
1017 && isSecure) {
1018 authenticate(SaslMechanism.Version.SASL);
1019 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion)
1020 && streamId != null) {
1021 if (Config.EXTENDED_SM_LOGGING) {
1022 Log.d(
1023 Config.LOGTAG,
1024 account.getJid().asBareJid()
1025 + ": resuming after stanza #"
1026 + stanzasReceived);
1027 }
1028 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
1029 this.mSmCatchupMessageCounter.set(0);
1030 this.mWaitingForSmCatchup.set(true);
1031 this.tagWriter.writeStanzaAsync(resume);
1032 } else if (needsBinding) {
1033 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
1034 sendBindRequest();
1035 } else {
1036 Log.d(
1037 Config.LOGTAG,
1038 account.getJid().asBareJid()
1039 + ": unable to find bind feature "
1040 + XmlHelper.printElementNames(this.streamFeatures));
1041 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1042 }
1043 } else {
1044 Log.d(
1045 Config.LOGTAG,
1046 account.getJid().asBareJid()
1047 + ": received NOP stream features "
1048 + this.streamFeatures);
1049 }
1050 }
1051
1052 private void authenticate(final SaslMechanism.Version version) throws IOException {
1053 final List<String> mechanisms = extractMechanisms(streamFeatures.findChild("mechanisms"));
1054 if (mechanisms.contains(External.MECHANISM) && account.getPrivateKeyAlias() != null) {
1055 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
1056 } else if (mechanisms.contains(ScramSha512.MECHANISM)) {
1057 saslMechanism = new ScramSha512(tagWriter, account, mXmppConnectionService.getRNG());
1058 } else if (mechanisms.contains(ScramSha256.MECHANISM)) {
1059 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
1060 } else if (mechanisms.contains(ScramSha1.MECHANISM)) {
1061 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
1062 } else if (mechanisms.contains(Plain.MECHANISM) && !account.getJid().getDomain().toEscapedString().equals("nimbuzz.com")) {
1063 saslMechanism = new Plain(tagWriter, account);
1064 } else if (mechanisms.contains(DigestMd5.MECHANISM)) {
1065 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
1066 } else if (mechanisms.contains(Anonymous.MECHANISM)) {
1067 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
1068 }
1069 if (saslMechanism == null) {
1070 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find supported SASL mechanism in " + mechanisms);
1071 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1072 }
1073 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
1074 if (pinnedMechanism > saslMechanism.getPriority()) {
1075 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
1076 " has lower priority (" + saslMechanism.getPriority() +
1077 ") than pinned priority (" + pinnedMechanism +
1078 "). Possible downgrade attack?");
1079 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1080 }
1081 final String firstMessage = saslMechanism.getClientFirstMessage();
1082 final Element authenticate;
1083 if (version == SaslMechanism.Version.SASL) {
1084 authenticate = new Element("auth", Namespace.SASL);
1085 if (!Strings.isNullOrEmpty(firstMessage)) {
1086 authenticate.setContent(firstMessage);
1087 }
1088 } else if (version == SaslMechanism.Version.SASL_2) {
1089 authenticate = new Element("authenticate", Namespace.SASL_2);
1090 if (!Strings.isNullOrEmpty(firstMessage)) {
1091 authenticate.addChild("initial-response").setContent(firstMessage);
1092 }
1093 final Element inline = this.streamFeatures.findChild("inline", Namespace.SASL_2);
1094 final boolean inlineStreamManagement = inline != null && inline.hasChild("sm", "urn:xmpp:sm:3");
1095 if (inlineStreamManagement && streamId != null) {
1096 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
1097 this.mSmCatchupMessageCounter.set(0);
1098 this.mWaitingForSmCatchup.set(true);
1099 authenticate.addChild(resume);
1100 }
1101 } else {
1102 throw new AssertionError("Missing implementation for " + version);
1103 }
1104
1105 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with "+version+ "/" + saslMechanism.getMechanism());
1106 authenticate.setAttribute("mechanism", saslMechanism.getMechanism());
1107 tagWriter.writeElement(authenticate);
1108 }
1109
1110 private static List<String> extractMechanisms(final Element stream) {
1111 final ArrayList<String> mechanisms = new ArrayList<>(stream
1112 .getChildren().size());
1113 for (final Element child : stream.getChildren()) {
1114 mechanisms.add(child.getContent());
1115 }
1116 return mechanisms;
1117 }
1118
1119
1120 private void register() {
1121 final String preAuth = account.getKey(Account.PRE_AUTH_REGISTRATION_TOKEN);
1122 if (preAuth != null && features.invite()) {
1123 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1124 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1125 sendUnmodifiedIqPacket(preAuthRequest, (account, response) -> {
1126 if (response.getType() == IqPacket.TYPE.RESULT) {
1127 sendRegistryRequest();
1128 } else {
1129 final String error = response.getErrorCondition();
1130 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": failed to pre auth. " + error);
1131 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1132 }
1133 }, true);
1134 } else {
1135 sendRegistryRequest();
1136 }
1137 }
1138
1139 private void sendRegistryRequest() {
1140 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1141 register.query(Namespace.REGISTER);
1142 register.setTo(account.getDomain());
1143 sendUnmodifiedIqPacket(register, (account, packet) -> {
1144 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1145 return;
1146 }
1147 if (packet.getType() == IqPacket.TYPE.ERROR) {
1148 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1149 }
1150 final Element query = packet.query(Namespace.REGISTER);
1151 if (query.hasChild("username") && (query.hasChild("password"))) {
1152 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1153 final Element username = new Element("username").setContent(account.getUsername());
1154 final Element password = new Element("password").setContent(account.getPassword());
1155 register1.query(Namespace.REGISTER).addChild(username);
1156 register1.query().addChild(password);
1157 register1.setFrom(account.getJid().asBareJid());
1158 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1159 } else if (query.hasChild("x", Namespace.DATA)) {
1160 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1161 final Element blob = query.findChild("data", "urn:xmpp:bob");
1162 final String id = packet.getId();
1163 InputStream is;
1164 if (blob != null) {
1165 try {
1166 final String base64Blob = blob.getContent();
1167 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1168 is = new ByteArrayInputStream(strBlob);
1169 } catch (Exception e) {
1170 is = null;
1171 }
1172 } else {
1173 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
1174 try {
1175 final String url = data.getValue("url");
1176 final String fallbackUrl = data.getValue("captcha-fallback-url");
1177 if (url != null) {
1178 is = HttpConnectionManager.open(url, useTor);
1179 } else if (fallbackUrl != null) {
1180 is = HttpConnectionManager.open(fallbackUrl, useTor);
1181 } else {
1182 is = null;
1183 }
1184 } catch (final IOException e) {
1185 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to fetch captcha", e);
1186 is = null;
1187 }
1188 }
1189
1190 if (is != null) {
1191 Bitmap captcha = BitmapFactory.decodeStream(is);
1192 try {
1193 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
1194 return;
1195 }
1196 } catch (Exception e) {
1197 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1198 }
1199 }
1200 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1201 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
1202 final String instructions = query.findChildContent("instructions");
1203 final Element oob = query.findChild("x", Namespace.OOB);
1204 final String url = oob == null ? null : oob.findChildContent("url");
1205 if (url != null) {
1206 setAccountCreationFailed(url);
1207 } else if (instructions != null) {
1208 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1209 if (matcher.find()) {
1210 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
1211 }
1212 }
1213 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1214 }
1215 }, true);
1216 }
1217
1218 private void setAccountCreationFailed(final String url) {
1219 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1220 if (httpUrl != null && httpUrl.isHttps()) {
1221 this.redirectionUrl = httpUrl;
1222 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1223 }
1224 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1225 }
1226
1227 public HttpUrl getRedirectionUrl() {
1228 return this.redirectionUrl;
1229 }
1230
1231 public void resetEverything() {
1232 resetAttemptCount(true);
1233 resetStreamId();
1234 clearIqCallbacks();
1235 this.stanzasSent = 0;
1236 mStanzaQueue.clear();
1237 this.redirectionUrl = null;
1238 synchronized (this.disco) {
1239 disco.clear();
1240 }
1241 synchronized (this.commands) {
1242 this.commands.clear();
1243 }
1244 }
1245
1246 private void sendBindRequest() {
1247 try {
1248 mXmppConnectionService.restoredFromDatabaseLatch.await();
1249 } catch (InterruptedException e) {
1250 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1251 return;
1252 }
1253 clearIqCallbacks();
1254 if (account.getJid().isBareJid()) {
1255 account.setResource(this.createNewResource());
1256 } else {
1257 fixResource(mXmppConnectionService, account);
1258 }
1259 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1260 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1261 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1262 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1263 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1264 return;
1265 }
1266 final Element bind = packet.findChild("bind");
1267 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1268 isBound = true;
1269 final Element jid = bind.findChild("jid");
1270 if (jid != null && jid.getContent() != null) {
1271 try {
1272 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1273 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1274 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1275 throw new StateChangingError(Account.State.BIND_FAILURE);
1276 }
1277 if (account.setJid(assignedJid)) {
1278 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1279 mXmppConnectionService.databaseBackend.updateAccount(account);
1280 }
1281 if (streamFeatures.hasChild("session")
1282 && !streamFeatures.findChild("session").hasChild("optional")) {
1283 sendStartSession();
1284 } else {
1285 sendPostBindInitialization();
1286 }
1287 return;
1288 } catch (final IllegalArgumentException e) {
1289 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1290 }
1291 } else {
1292 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1293 }
1294 } else {
1295 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet);
1296 }
1297 final Element error = packet.findChild("error");
1298 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1299 account.setResource(createNewResource());
1300 }
1301 throw new StateChangingError(Account.State.BIND_FAILURE);
1302 }, true);
1303 }
1304
1305 private void clearIqCallbacks() {
1306 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1307 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1308 synchronized (this.packetCallbacks) {
1309 if (this.packetCallbacks.size() == 0) {
1310 return;
1311 }
1312 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1313 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1314 while (iterator.hasNext()) {
1315 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1316 callbacks.add(entry.second);
1317 iterator.remove();
1318 }
1319 }
1320 for (OnIqPacketReceived callback : callbacks) {
1321 try {
1322 callback.onIqPacketReceived(account, failurePacket);
1323 } catch (StateChangingError error) {
1324 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1325 //ignore
1326 }
1327 }
1328 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1329 }
1330
1331 public void sendDiscoTimeout() {
1332 if (mWaitForDisco.compareAndSet(true, false)) {
1333 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1334 finalizeBind();
1335 }
1336 }
1337
1338 private void sendStartSession() {
1339 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1340 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1341 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1342 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1343 if (packet.getType() == IqPacket.TYPE.RESULT) {
1344 sendPostBindInitialization();
1345 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1346 throw new StateChangingError(Account.State.SESSION_FAILURE);
1347 }
1348 }, true);
1349 }
1350
1351 private void sendPostBindInitialization() {
1352 smVersion = 0;
1353 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1354 smVersion = 3;
1355 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1356 smVersion = 2;
1357 }
1358 if (smVersion != 0) {
1359 synchronized (this.mStanzaQueue) {
1360 final EnablePacket enable = new EnablePacket(smVersion);
1361 tagWriter.writeStanzaAsync(enable);
1362 stanzasSent = 0;
1363 mStanzaQueue.clear();
1364 }
1365 }
1366 features.carbonsEnabled = false;
1367 features.blockListRequested = false;
1368 synchronized (this.disco) {
1369 this.disco.clear();
1370 }
1371 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1372 mPendingServiceDiscoveries.set(0);
1373 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain().toEscapedString())) {
1374 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1375 mWaitForDisco.set(false);
1376 } else {
1377 mWaitForDisco.set(true);
1378 }
1379 lastDiscoStarted = SystemClock.elapsedRealtime();
1380 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1381 Element caps = streamFeatures.findChild("c");
1382 final String hash = caps == null ? null : caps.getAttribute("hash");
1383 final String ver = caps == null ? null : caps.getAttribute("ver");
1384 ServiceDiscoveryResult discoveryResult = null;
1385 if (hash != null && ver != null) {
1386 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1387 }
1388 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1389 if (requestDiscoItemsFirst) {
1390 sendServiceDiscoveryItems(account.getDomain());
1391 }
1392 if (discoveryResult == null) {
1393 sendServiceDiscoveryInfo(account.getDomain());
1394 } else {
1395 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1396 disco.put(account.getDomain(), discoveryResult);
1397 }
1398 discoverMamPreferences();
1399 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1400 if (!requestDiscoItemsFirst) {
1401 sendServiceDiscoveryItems(account.getDomain());
1402 }
1403
1404 if (!mWaitForDisco.get()) {
1405 finalizeBind();
1406 }
1407 this.lastSessionStarted = SystemClock.elapsedRealtime();
1408 }
1409
1410 private void sendServiceDiscoveryInfo(final Jid jid) {
1411 mPendingServiceDiscoveries.incrementAndGet();
1412 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1413 iq.setTo(jid);
1414 iq.query("http://jabber.org/protocol/disco#info");
1415 this.sendIqPacket(iq, (account, packet) -> {
1416 if (packet.getType() == IqPacket.TYPE.RESULT) {
1417 boolean advancedStreamFeaturesLoaded;
1418 synchronized (XmppConnection.this.disco) {
1419 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1420 if (jid.equals(account.getDomain())) {
1421 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1422 }
1423 disco.put(jid, result);
1424 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain())
1425 && disco.containsKey(account.getJid().asBareJid());
1426 }
1427 if (advancedStreamFeaturesLoaded && (jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid()))) {
1428 enableAdvancedStreamFeatures();
1429 }
1430 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1431 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1432 final boolean serverOrAccount = jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid());
1433 final boolean advancedStreamFeaturesLoaded;
1434 if (serverOrAccount) {
1435 synchronized (XmppConnection.this.disco) {
1436 disco.put(jid, ServiceDiscoveryResult.empty());
1437 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain()) && disco.containsKey(account.getJid().asBareJid());
1438 }
1439 } else {
1440 advancedStreamFeaturesLoaded = false;
1441 }
1442 if (advancedStreamFeaturesLoaded) {
1443 enableAdvancedStreamFeatures();
1444 }
1445 }
1446 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1447 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1448 && mWaitForDisco.compareAndSet(true, false)) {
1449 finalizeBind();
1450 }
1451 }
1452 });
1453 }
1454
1455 private void discoverMamPreferences() {
1456 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1457 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1458 sendIqPacket(request, (account, response) -> {
1459 if (response.getType() == IqPacket.TYPE.RESULT) {
1460 Element prefs = response.findChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1461 isMamPreferenceAlways = "always".equals(prefs == null ? null : prefs.getAttribute("default"));
1462 }
1463 });
1464 }
1465
1466 private void discoverCommands() {
1467 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1468 request.setTo(account.getDomain());
1469 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1470 sendIqPacket(request, (account, response) -> {
1471 if (response.getType() == IqPacket.TYPE.RESULT) {
1472 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1473 if (query == null) {
1474 return;
1475 }
1476 final HashMap<String, Jid> commands = new HashMap<>();
1477 for (final Element child : query.getChildren()) {
1478 if ("item".equals(child.getName())) {
1479 final String node = child.getAttribute("node");
1480 final Jid jid = child.getAttributeAsJid("jid");
1481 if (node != null && jid != null) {
1482 commands.put(node, jid);
1483 }
1484 }
1485 }
1486 Log.d(Config.LOGTAG, commands.toString());
1487 synchronized (this.commands) {
1488 this.commands.clear();
1489 this.commands.putAll(commands);
1490 }
1491 }
1492 });
1493 }
1494
1495 public boolean isMamPreferenceAlways() {
1496 return isMamPreferenceAlways;
1497 }
1498
1499 private void finalizeBind() {
1500 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1501 if (bindListener != null) {
1502 bindListener.onBind(account);
1503 }
1504 changeStatus(Account.State.ONLINE);
1505 }
1506
1507 private void enableAdvancedStreamFeatures() {
1508 if (getFeatures().blocking() && !features.blockListRequested) {
1509 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1510 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1511 }
1512 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1513 listener.onAdvancedStreamFeaturesAvailable(account);
1514 }
1515 if (getFeatures().carbons() && !features.carbonsEnabled) {
1516 sendEnableCarbons();
1517 }
1518 if (getFeatures().commands()) {
1519 discoverCommands();
1520 }
1521 }
1522
1523 private void sendServiceDiscoveryItems(final Jid server) {
1524 mPendingServiceDiscoveries.incrementAndGet();
1525 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1526 iq.setTo(server.getDomain());
1527 iq.query("http://jabber.org/protocol/disco#items");
1528 this.sendIqPacket(iq, (account, packet) -> {
1529 if (packet.getType() == IqPacket.TYPE.RESULT) {
1530 final HashSet<Jid> items = new HashSet<>();
1531 final List<Element> elements = packet.query().getChildren();
1532 for (final Element element : elements) {
1533 if (element.getName().equals("item")) {
1534 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1535 if (jid != null && !jid.equals(account.getDomain())) {
1536 items.add(jid);
1537 }
1538 }
1539 }
1540 for (Jid jid : items) {
1541 sendServiceDiscoveryInfo(jid);
1542 }
1543 } else {
1544 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1545 }
1546 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1547 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1548 && mWaitForDisco.compareAndSet(true, false)) {
1549 finalizeBind();
1550 }
1551 }
1552 });
1553 }
1554
1555 private void sendEnableCarbons() {
1556 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1557 iq.addChild("enable", "urn:xmpp:carbons:2");
1558 this.sendIqPacket(iq, (account, packet) -> {
1559 if (!packet.hasChild("error")) {
1560 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1561 + ": successfully enabled carbons");
1562 features.carbonsEnabled = true;
1563 } else {
1564 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1565 + ": could not enable carbons " + packet);
1566 }
1567 });
1568 }
1569
1570 private void processStreamError(final Tag currentTag) throws IOException {
1571 final Element streamError = tagReader.readElement(currentTag);
1572 if (streamError == null) {
1573 return;
1574 }
1575 if (streamError.hasChild("conflict")) {
1576 account.setResource(createNewResource());
1577 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1578 throw new IOException();
1579 } else if (streamError.hasChild("host-unknown")) {
1580 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1581 } else if (streamError.hasChild("policy-violation")) {
1582 this.lastConnect = SystemClock.elapsedRealtime();
1583 final String text = streamError.findChildContent("text");
1584 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1585 failPendingMessages(text);
1586 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1587 } else {
1588 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
1589 throw new StateChangingException(Account.State.STREAM_ERROR);
1590 }
1591 }
1592
1593 private void failPendingMessages(final String error) {
1594 synchronized (this.mStanzaQueue) {
1595 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1596 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1597 if (stanza instanceof MessagePacket) {
1598 final MessagePacket packet = (MessagePacket) stanza;
1599 final String id = packet.getId();
1600 final Jid to = packet.getTo();
1601 mXmppConnectionService.markMessage(account,
1602 to.asBareJid(),
1603 id,
1604 Message.STATUS_SEND_FAILED,
1605 error);
1606 }
1607 }
1608 }
1609 }
1610
1611 private void sendStartStream() throws IOException {
1612 final Tag stream = Tag.start("stream:stream");
1613 stream.setAttribute("to", account.getServer());
1614 stream.setAttribute("version", "1.0");
1615 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1616 stream.setAttribute("xmlns", "jabber:client");
1617 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1618 tagWriter.writeTag(stream);
1619 }
1620
1621 private String createNewResource() {
1622 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1623 }
1624
1625 private String nextRandomId() {
1626 return nextRandomId(false);
1627 }
1628
1629 private String nextRandomId(boolean s) {
1630 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1631 }
1632
1633 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1634 packet.setFrom(account.getJid());
1635 return this.sendUnmodifiedIqPacket(packet, callback, false);
1636 }
1637
1638 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1639 if (packet.getId() == null) {
1640 packet.setAttribute("id", nextRandomId());
1641 }
1642 if (callback != null) {
1643 synchronized (this.packetCallbacks) {
1644 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1645 }
1646 }
1647 this.sendPacket(packet, force);
1648 return packet.getId();
1649 }
1650
1651 public void sendMessagePacket(final MessagePacket packet) {
1652 this.sendPacket(packet);
1653 }
1654
1655 public void sendPresencePacket(final PresencePacket packet) {
1656 this.sendPacket(packet);
1657 }
1658
1659 private synchronized void sendPacket(final AbstractStanza packet) {
1660 sendPacket(packet, false);
1661 }
1662
1663 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1664 if (stanzasSent == Integer.MAX_VALUE) {
1665 resetStreamId();
1666 disconnect(true);
1667 return;
1668 }
1669 synchronized (this.mStanzaQueue) {
1670 if (force || isBound) {
1671 tagWriter.writeStanzaAsync(packet);
1672 } else {
1673 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1674 }
1675 if (packet instanceof AbstractAcknowledgeableStanza) {
1676 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1677
1678 if (this.mStanzaQueue.size() != 0) {
1679 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1680 if (currentHighestKey != stanzasSent) {
1681 throw new AssertionError("Stanza count messed up");
1682 }
1683 }
1684
1685 ++stanzasSent;
1686 this.mStanzaQueue.append(stanzasSent, stanza);
1687 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1688 if (Config.EXTENDED_SM_LOGGING) {
1689 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1690 }
1691 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1692 }
1693 }
1694 }
1695 }
1696
1697 public void sendPing() {
1698 if (!r()) {
1699 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1700 iq.setFrom(account.getJid());
1701 iq.addChild("ping", Namespace.PING);
1702 this.sendIqPacket(iq, null);
1703 }
1704 this.lastPingSent = SystemClock.elapsedRealtime();
1705 }
1706
1707 public void setOnMessagePacketReceivedListener(
1708 final OnMessagePacketReceived listener) {
1709 this.messageListener = listener;
1710 }
1711
1712 public void setOnUnregisteredIqPacketReceivedListener(
1713 final OnIqPacketReceived listener) {
1714 this.unregisteredIqListener = listener;
1715 }
1716
1717 public void setOnPresencePacketReceivedListener(
1718 final OnPresencePacketReceived listener) {
1719 this.presenceListener = listener;
1720 }
1721
1722 public void setOnJinglePacketReceivedListener(
1723 final OnJinglePacketReceived listener) {
1724 this.jingleListener = listener;
1725 }
1726
1727 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1728 this.statusListener = listener;
1729 }
1730
1731 public void setOnBindListener(final OnBindListener listener) {
1732 this.bindListener = listener;
1733 }
1734
1735 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1736 this.acknowledgedListener = listener;
1737 }
1738
1739 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1740 this.advancedStreamFeaturesLoadedListeners.add(listener);
1741 }
1742
1743 private void forceCloseSocket() {
1744 FileBackend.close(this.socket);
1745 FileBackend.close(this.tagReader);
1746 }
1747
1748 public void interrupt() {
1749 if (this.mThread != null) {
1750 this.mThread.interrupt();
1751 }
1752 }
1753
1754 public void disconnect(final boolean force) {
1755 interrupt();
1756 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
1757 if (force) {
1758 forceCloseSocket();
1759 } else {
1760 final TagWriter currentTagWriter = this.tagWriter;
1761 if (currentTagWriter.isActive()) {
1762 currentTagWriter.finish();
1763 final Socket currentSocket = this.socket;
1764 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1765 try {
1766 currentTagWriter.await(1, TimeUnit.SECONDS);
1767 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1768 currentTagWriter.writeTag(Tag.end("stream:stream"));
1769 if (streamCountDownLatch != null) {
1770 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1771 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1772 } else {
1773 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1774 }
1775 }
1776 } catch (InterruptedException e) {
1777 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1778 } catch (final IOException e) {
1779 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1780 } finally {
1781 FileBackend.close(currentSocket);
1782 }
1783 } else {
1784 forceCloseSocket();
1785 }
1786 }
1787 }
1788
1789 private void resetStreamId() {
1790 this.streamId = null;
1791 }
1792
1793 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1794 synchronized (this.disco) {
1795 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1796 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1797 if (cursor.getValue().getFeatures().contains(feature)) {
1798 items.add(cursor);
1799 }
1800 }
1801 return items;
1802 }
1803 }
1804
1805 public Jid findDiscoItemByFeature(final String feature) {
1806 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1807 if (items.size() >= 1) {
1808 return items.get(0).getKey();
1809 }
1810 return null;
1811 }
1812
1813 public boolean r() {
1814 if (getFeatures().sm()) {
1815 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1816 return true;
1817 } else {
1818 return false;
1819 }
1820 }
1821
1822 public List<String> getMucServersWithholdAccount() {
1823 final List<String> servers = getMucServers();
1824 servers.remove(account.getDomain().toEscapedString());
1825 return servers;
1826 }
1827
1828 public List<String> getMucServers() {
1829 List<String> servers = new ArrayList<>();
1830 synchronized (this.disco) {
1831 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1832 final ServiceDiscoveryResult value = cursor.getValue();
1833 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1834 && value.hasIdentity("conference", "text")
1835 && !value.getFeatures().contains("jabber:iq:gateway")
1836 && !value.hasIdentity("conference", "irc")) {
1837 servers.add(cursor.getKey().toString());
1838 }
1839 }
1840 }
1841 return servers;
1842 }
1843
1844 public String getMucServer() {
1845 List<String> servers = getMucServers();
1846 return servers.size() > 0 ? servers.get(0) : null;
1847 }
1848
1849 public int getTimeToNextAttempt() {
1850 final int additionalTime = account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
1851 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
1852 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1853 return interval - secondsSinceLast;
1854 }
1855
1856 public int getAttempt() {
1857 return this.attempt;
1858 }
1859
1860 public Features getFeatures() {
1861 return this.features;
1862 }
1863
1864 public long getLastSessionEstablished() {
1865 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1866 return System.currentTimeMillis() - diff;
1867 }
1868
1869 public long getLastConnect() {
1870 return this.lastConnect;
1871 }
1872
1873 public long getLastPingSent() {
1874 return this.lastPingSent;
1875 }
1876
1877 public long getLastDiscoStarted() {
1878 return this.lastDiscoStarted;
1879 }
1880
1881 public long getLastPacketReceived() {
1882 return this.lastPacketReceived;
1883 }
1884
1885 public void sendActive() {
1886 this.sendPacket(new ActivePacket());
1887 }
1888
1889 public void sendInactive() {
1890 this.sendPacket(new InactivePacket());
1891 }
1892
1893 public void resetAttemptCount(boolean resetConnectTime) {
1894 this.attempt = 0;
1895 if (resetConnectTime) {
1896 this.lastConnect = 0;
1897 }
1898 }
1899
1900 public void setInteractive(boolean interactive) {
1901 this.mInteractive = interactive;
1902 }
1903
1904 public Identity getServerIdentity() {
1905 synchronized (this.disco) {
1906 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
1907 if (result == null) {
1908 return Identity.UNKNOWN;
1909 }
1910 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1911 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1912 switch (id.getName()) {
1913 case "Prosody":
1914 return Identity.PROSODY;
1915 case "ejabberd":
1916 return Identity.EJABBERD;
1917 case "Slack-XMPP":
1918 return Identity.SLACK;
1919 }
1920 }
1921 }
1922 }
1923 return Identity.UNKNOWN;
1924 }
1925
1926 private IqGenerator getIqGenerator() {
1927 return mXmppConnectionService.getIqGenerator();
1928 }
1929
1930 public enum Identity {
1931 FACEBOOK,
1932 SLACK,
1933 EJABBERD,
1934 PROSODY,
1935 NIMBUZZ,
1936 UNKNOWN
1937 }
1938
1939 private class MyKeyManager implements X509KeyManager {
1940 @Override
1941 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1942 return account.getPrivateKeyAlias();
1943 }
1944
1945 @Override
1946 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1947 return null;
1948 }
1949
1950 @Override
1951 public X509Certificate[] getCertificateChain(String alias) {
1952 Log.d(Config.LOGTAG, "getting certificate chain");
1953 try {
1954 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1955 } catch (final Exception e) {
1956 Log.d(Config.LOGTAG, "could not get certificate chain", e);
1957 return new X509Certificate[0];
1958 }
1959 }
1960
1961 @Override
1962 public String[] getClientAliases(String s, Principal[] principals) {
1963 final String alias = account.getPrivateKeyAlias();
1964 return alias != null ? new String[]{alias} : new String[0];
1965 }
1966
1967 @Override
1968 public String[] getServerAliases(String s, Principal[] principals) {
1969 return new String[0];
1970 }
1971
1972 @Override
1973 public PrivateKey getPrivateKey(String alias) {
1974 try {
1975 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1976 } catch (Exception e) {
1977 return null;
1978 }
1979 }
1980 }
1981
1982 private static class StateChangingError extends Error {
1983 private final Account.State state;
1984
1985 public StateChangingError(Account.State state) {
1986 this.state = state;
1987 }
1988 }
1989
1990 private static class StateChangingException extends IOException {
1991 private final Account.State state;
1992
1993 public StateChangingException(Account.State state) {
1994 this.state = state;
1995 }
1996 }
1997
1998 public class Features {
1999 XmppConnection connection;
2000 private boolean carbonsEnabled = false;
2001 private boolean encryptionEnabled = false;
2002 private boolean blockListRequested = false;
2003
2004 public Features(final XmppConnection connection) {
2005 this.connection = connection;
2006 }
2007
2008 private boolean hasDiscoFeature(final Jid server, final String feature) {
2009 synchronized (XmppConnection.this.disco) {
2010 return connection.disco.containsKey(server) &&
2011 connection.disco.get(server).getFeatures().contains(feature);
2012 }
2013 }
2014
2015 public boolean carbons() {
2016 return hasDiscoFeature(account.getDomain(), "urn:xmpp:carbons:2");
2017 }
2018
2019 public boolean commands() {
2020 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
2021 }
2022
2023 public boolean easyOnboardingInvites() {
2024 synchronized (commands) {
2025 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
2026 }
2027 }
2028
2029 public boolean bookmarksConversion() {
2030 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
2031 }
2032
2033 public boolean avatarConversion() {
2034 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION) && pepPublishOptions();
2035 }
2036
2037 public boolean blocking() {
2038 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
2039 }
2040
2041 public boolean spamReporting() {
2042 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
2043 }
2044
2045 public boolean flexibleOfflineMessageRetrieval() {
2046 return hasDiscoFeature(account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2047 }
2048
2049 public boolean register() {
2050 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2051 }
2052
2053 public boolean invite() {
2054 return connection.streamFeatures != null && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2055 }
2056
2057 public boolean sm() {
2058 return streamId != null
2059 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
2060 }
2061
2062 public boolean csi() {
2063 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
2064 }
2065
2066 public boolean pep() {
2067 synchronized (XmppConnection.this.disco) {
2068 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2069 return info != null && info.hasIdentity("pubsub", "pep");
2070 }
2071 }
2072
2073 public boolean pepPersistent() {
2074 synchronized (XmppConnection.this.disco) {
2075 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2076 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
2077 }
2078 }
2079
2080 public boolean pepPublishOptions() {
2081 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2082 }
2083
2084 public boolean pepOmemoWhitelisted() {
2085 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2086 }
2087
2088 public boolean mam() {
2089 return MessageArchiveService.Version.has(getAccountFeatures());
2090 }
2091
2092 public List<String> getAccountFeatures() {
2093 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2094 return result == null ? Collections.emptyList() : result.getFeatures();
2095 }
2096
2097 public boolean push() {
2098 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2099 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2100 }
2101
2102 public boolean rosterVersioning() {
2103 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2104 }
2105
2106 public void setBlockListRequested(boolean value) {
2107 this.blockListRequested = value;
2108 }
2109
2110 public boolean httpUpload(long filesize) {
2111 if (Config.DISABLE_HTTP_UPLOAD) {
2112 return false;
2113 } else {
2114 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2115 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2116 if (items.size() > 0) {
2117 try {
2118 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2119 if (filesize <= maxsize) {
2120 return true;
2121 } else {
2122 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
2123 return false;
2124 }
2125 } catch (Exception e) {
2126 return true;
2127 }
2128 }
2129 }
2130 return false;
2131 }
2132 }
2133
2134 public boolean useLegacyHttpUpload() {
2135 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2136 }
2137
2138 public long getMaxHttpUploadSize() {
2139 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2140 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2141 if (items.size() > 0) {
2142 try {
2143 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2144 } catch (Exception e) {
2145 //ignored
2146 }
2147 }
2148 }
2149 return -1;
2150 }
2151
2152 public boolean stanzaIds() {
2153 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2154 }
2155
2156 public boolean bookmarks2() {
2157 return Config.USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
2158 }
2159
2160 public boolean externalServiceDiscovery() {
2161 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2162 }
2163 }
2164}