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")) {
470 switchOverToTls();
471 } else if (nextTag.isStart("success")) {
472 final Element success = tagReader.readElement(nextTag);
473 final SaslMechanism.Version version;
474 try {
475 version = SaslMechanism.Version.of(success);
476 } catch (final IllegalArgumentException e) {
477 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
478 }
479 final String challenge;
480 if (version == SaslMechanism.Version.SASL) {
481 challenge = success.getContent();
482 } else if (version == SaslMechanism.Version.SASL_2) {
483 challenge = success.findChildContent("additional-data");
484 } else {
485 throw new AssertionError("Missing implementation for " + version);
486 }
487 try {
488 saslMechanism.getResponse(challenge);
489 } catch (final SaslMechanism.AuthenticationException e) {
490 Log.e(Config.LOGTAG, String.valueOf(e));
491 throw new StateChangingException(Account.State.UNAUTHORIZED);
492 }
493 Log.d(
494 Config.LOGTAG,
495 account.getJid().asBareJid().toString()
496 + ": logged in (using "
497 + version
498 + ")");
499 account.setKey(
500 Account.PINNED_MECHANISM_KEY, String.valueOf(saslMechanism.getPriority()));
501 if (version == SaslMechanism.Version.SASL_2) {
502 final String authorizationIdentifier = success.findChildContent("authorization-identifier");
503 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": SASL 2.0 authorization identifier was "+authorizationIdentifier);
504 }
505 if (version == SaslMechanism.Version.SASL) {
506 tagReader.reset();
507 sendStartStream();
508 final Tag tag = tagReader.readTag();
509 if (tag != null && tag.isStart("stream")) {
510 processStream();
511 } else {
512 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
513 }
514 break;
515 }
516 } else if (nextTag.isStart("failure")) {
517 final Element failure = tagReader.readElement(nextTag);
518 if (Namespace.TLS.equals(failure.getNamespace())) {
519 throw new StateChangingException(Account.State.TLS_ERROR);
520 }
521 final SaslMechanism.Version version;
522 try {
523 version = SaslMechanism.Version.of(failure);
524 } catch (final IllegalArgumentException e) {
525 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
526 }
527 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
528 if (failure.hasChild("temporary-auth-failure")) {
529 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
530 } else if (failure.hasChild("account-disabled")) {
531 final String text = failure.findChildContent("text");
532 if (Strings.isNullOrEmpty(text)) {
533 throw new StateChangingException(Account.State.UNAUTHORIZED);
534 }
535 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
536 if (matcher.find()) {
537 final HttpUrl url;
538 try {
539 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
540 } catch (final IllegalArgumentException e) {
541 throw new StateChangingException(Account.State.UNAUTHORIZED);
542 }
543 if (url.isHttps()) {
544 this.redirectionUrl = url;
545 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
546 }
547 }
548 }
549 throw new StateChangingException(Account.State.UNAUTHORIZED);
550 } else if (nextTag.isStart("challenge")) {
551 final Element challenge = tagReader.readElement(nextTag);
552 final SaslMechanism.Version version;
553 try {
554 version = SaslMechanism.Version.of(challenge);
555 } catch (final IllegalArgumentException e) {
556 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
557 }
558 final Element response;
559 if (version == SaslMechanism.Version.SASL) {
560 response = new Element("response", Namespace.SASL);
561 } else if (version == SaslMechanism.Version.SASL_2) {
562 response = new Element("response", Namespace.SASL_2);
563 } else {
564 throw new AssertionError("Missing implementation for " + version);
565 }
566 try {
567 response.setContent(saslMechanism.getResponse(challenge.getContent()));
568 } catch (final SaslMechanism.AuthenticationException e) {
569 // TODO: Send auth abort tag.
570 Log.e(Config.LOGTAG, e.toString());
571 throw new StateChangingException(Account.State.UNAUTHORIZED);
572 }
573 tagWriter.writeElement(response);
574 } else if (nextTag.isStart("enabled")) {
575 final Element enabled = tagReader.readElement(nextTag);
576 if ("true".equals(enabled.getAttribute("resume"))) {
577 this.streamId = enabled.getAttribute("id");
578 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
579 + ": stream management(" + smVersion
580 + ") enabled (resumable)");
581 } else {
582 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
583 + ": stream management(" + smVersion + ") enabled");
584 }
585 this.stanzasReceived = 0;
586 this.inSmacksSession = true;
587 final RequestPacket r = new RequestPacket(smVersion);
588 tagWriter.writeStanzaAsync(r);
589 } else if (nextTag.isStart("resumed")) {
590 this.inSmacksSession = true;
591 this.isBound = true;
592 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
593 lastPacketReceived = SystemClock.elapsedRealtime();
594 final Element resumed = tagReader.readElement(nextTag);
595 final String h = resumed.getAttribute("h");
596 try {
597 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
598 final boolean acknowledgedMessages;
599 synchronized (this.mStanzaQueue) {
600 final int serverCount = Integer.parseInt(h);
601 if (serverCount < stanzasSent) {
602 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
603 + ": session resumed with lost packages");
604 stanzasSent = serverCount;
605 } else {
606 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed");
607 }
608 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
609 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
610 failedStanzas.add(mStanzaQueue.valueAt(i));
611 }
612 mStanzaQueue.clear();
613 }
614 if (acknowledgedMessages) {
615 mXmppConnectionService.updateConversationUi();
616 }
617 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
618 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
619 if (packet instanceof MessagePacket) {
620 MessagePacket message = (MessagePacket) packet;
621 mXmppConnectionService.markMessage(account,
622 message.getTo().asBareJid(),
623 message.getId(),
624 Message.STATUS_UNSEND);
625 }
626 sendPacket(packet);
627 }
628 } catch (final NumberFormatException ignored) {
629 }
630 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
631 changeStatus(Account.State.ONLINE);
632 } else if (nextTag.isStart("r")) {
633 tagReader.readElement(nextTag);
634 if (Config.EXTENDED_SM_LOGGING) {
635 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
636 }
637 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
638 tagWriter.writeStanzaAsync(ack);
639 } else if (nextTag.isStart("a")) {
640 boolean accountUiNeedsRefresh = false;
641 synchronized (NotificationService.CATCHUP_LOCK) {
642 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
643 final int messageCount = mSmCatchupMessageCounter.get();
644 final int pendingIQs = packetCallbacks.size();
645 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": SM catchup complete (messages=" + messageCount + ", pending IQs=" + pendingIQs + ")");
646 accountUiNeedsRefresh = true;
647 if (messageCount > 0) {
648 mXmppConnectionService.getNotificationService().finishBacklog(true, account);
649 }
650 }
651 }
652 if (accountUiNeedsRefresh) {
653 mXmppConnectionService.updateAccountUi();
654 }
655 final Element ack = tagReader.readElement(nextTag);
656 lastPacketReceived = SystemClock.elapsedRealtime();
657 try {
658 final boolean acknowledgedMessages;
659 synchronized (this.mStanzaQueue) {
660 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
661 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
662 }
663 if (acknowledgedMessages) {
664 mXmppConnectionService.updateConversationUi();
665 }
666 } catch (NumberFormatException | NullPointerException e) {
667 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server send ack without sequence number");
668 }
669 } else if (nextTag.isStart("failed")) {
670 Element failed = tagReader.readElement(nextTag);
671 try {
672 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
673 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed but server acknowledged stanza #" + serverCount);
674 final boolean acknowledgedMessages;
675 synchronized (this.mStanzaQueue) {
676 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
677 }
678 if (acknowledgedMessages) {
679 mXmppConnectionService.updateConversationUi();
680 }
681 } catch (NumberFormatException | NullPointerException e) {
682 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
683 }
684 resetStreamId();
685 sendBindRequest();
686 } else if (nextTag.isStart("iq")) {
687 processIq(nextTag);
688 } else if (nextTag.isStart("message")) {
689 processMessage(nextTag);
690 } else if (nextTag.isStart("presence")) {
691 processPresence(nextTag);
692 }
693 nextTag = tagReader.readTag();
694 }
695 if (nextTag != null && nextTag.isEnd("stream")) {
696 streamCountDownLatch.countDown();
697 }
698 }
699
700 private boolean acknowledgeStanzaUpTo(int serverCount) {
701 if (serverCount > stanzasSent) {
702 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
703 }
704 boolean acknowledgedMessages = false;
705 for (int i = 0; i < mStanzaQueue.size(); ++i) {
706 if (serverCount >= mStanzaQueue.keyAt(i)) {
707 if (Config.EXTENDED_SM_LOGGING) {
708 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
709 }
710 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
711 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
712 final MessagePacket packet = (MessagePacket) stanza;
713 final String id = packet.getId();
714 final Jid to = packet.getTo();
715 if (id != null && to != null) {
716 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, to, id);
717 }
718 }
719 mStanzaQueue.removeAt(i);
720 i--;
721 }
722 }
723 return acknowledgedMessages;
724 }
725
726 private @NonNull
727 Element processPacket(final Tag currentTag, final int packetType) throws IOException {
728 final Element element;
729 switch (packetType) {
730 case PACKET_IQ:
731 element = new IqPacket();
732 break;
733 case PACKET_MESSAGE:
734 element = new MessagePacket();
735 break;
736 case PACKET_PRESENCE:
737 element = new PresencePacket();
738 break;
739 default:
740 throw new AssertionError("Should never encounter invalid type");
741 }
742 element.setAttributes(currentTag.getAttributes());
743 Tag nextTag = tagReader.readTag();
744 if (nextTag == null) {
745 throw new IOException("interrupted mid tag");
746 }
747 while (!nextTag.isEnd(element.getName())) {
748 if (!nextTag.isNo()) {
749 element.addChild(tagReader.readElement(nextTag));
750 }
751 nextTag = tagReader.readTag();
752 if (nextTag == null) {
753 throw new IOException("interrupted mid tag");
754 }
755 }
756 if (stanzasReceived == Integer.MAX_VALUE) {
757 resetStreamId();
758 throw new IOException("time to restart the session. cant handle >2 billion pcks");
759 }
760 if (inSmacksSession) {
761 ++stanzasReceived;
762 } else if (features.sm()) {
763 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
764 }
765 lastPacketReceived = SystemClock.elapsedRealtime();
766 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
767 Log.d(Config.LOGTAG, "[background stanza] " + element);
768 }
769 if (element instanceof IqPacket
770 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
771 && element.hasChild("jingle", Namespace.JINGLE)) {
772 return JinglePacket.upgrade((IqPacket) element);
773 } else {
774 return element;
775 }
776 }
777
778 private void processIq(final Tag currentTag) throws IOException {
779 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
780 if (!packet.valid()) {
781 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
782 return;
783 }
784 if (packet instanceof JinglePacket) {
785 if (this.jingleListener != null) {
786 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
787 }
788 } else {
789 OnIqPacketReceived callback = null;
790 synchronized (this.packetCallbacks) {
791 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
792 if (packetCallbackDuple != null) {
793 // Packets to the server should have responses from the server
794 if (packetCallbackDuple.first.toServer(account)) {
795 if (packet.fromServer(account)) {
796 callback = packetCallbackDuple.second;
797 packetCallbacks.remove(packet.getId());
798 } else {
799 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
800 }
801 } else {
802 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
803 callback = packetCallbackDuple.second;
804 packetCallbacks.remove(packet.getId());
805 } else {
806 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
807 }
808 }
809 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
810 callback = this.unregisteredIqListener;
811 }
812 }
813 if (callback != null) {
814 try {
815 callback.onIqPacketReceived(account, packet);
816 } catch (StateChangingError error) {
817 throw new StateChangingException(error.state);
818 }
819 }
820 }
821 }
822
823 private void processMessage(final Tag currentTag) throws IOException {
824 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
825 if (!packet.valid()) {
826 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
827 return;
828 }
829 this.messageListener.onMessagePacketReceived(account, packet);
830 }
831
832 private void processPresence(final Tag currentTag) throws IOException {
833 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
834 if (!packet.valid()) {
835 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
836 return;
837 }
838 this.presenceListener.onPresencePacketReceived(account, packet);
839 }
840
841 private void sendStartTLS() throws IOException {
842 final Tag startTLS = Tag.empty("starttls");
843 startTLS.setAttribute("xmlns", Namespace.TLS);
844 tagWriter.writeTag(startTLS);
845 }
846
847 private void switchOverToTls() throws XmlPullParserException, IOException {
848 tagReader.readTag();
849 final Socket socket = this.socket;
850 final SSLSocket sslSocket = upgradeSocketToTls(socket);
851 tagReader.setInputStream(sslSocket.getInputStream());
852 tagWriter.setOutputStream(sslSocket.getOutputStream());
853 sendStartStream();
854 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
855 features.encryptionEnabled = true;
856 final Tag tag = tagReader.readTag();
857 if (tag != null && tag.isStart("stream")) {
858 SSLSocketHelper.log(account, sslSocket);
859 processStream();
860 } else {
861 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
862 }
863 sslSocket.close();
864 }
865
866 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
867 final SSLSocketFactory sslSocketFactory;
868 try {
869 sslSocketFactory = getSSLSocketFactory();
870 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
871 throw new StateChangingException(Account.State.TLS_ERROR);
872 }
873 final InetAddress address = socket.getInetAddress();
874 final SSLSocket sslSocket = (SSLSocket) sslSocketFactory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
875 SSLSocketHelper.setSecurity(sslSocket);
876 SSLSocketHelper.setHostname(sslSocket, IDN.toASCII(account.getServer()));
877 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
878 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
879 try {
880 if (!xmppDomainVerifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
881 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate domain verification failed");
882 FileBackend.close(sslSocket);
883 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
884 }
885 } catch (final SSLPeerUnverifiedException e) {
886 FileBackend.close(sslSocket);
887 throw new StateChangingException(Account.State.TLS_ERROR);
888 }
889 return sslSocket;
890 }
891
892 private void processStreamFeatures(final Tag currentTag) throws IOException {
893 this.streamFeatures = tagReader.readElement(currentTag);
894 final boolean isSecure =
895 features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
896 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
897 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
898 && !features.encryptionEnabled) {
899 sendStartTLS();
900 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
901 && account.isOptionSet(Account.OPTION_REGISTER)) {
902 if (isSecure) {
903 register();
904 } else {
905 Log.d(
906 Config.LOGTAG,
907 account.getJid().asBareJid()
908 + ": unable to find STARTTLS for registration process "
909 + XmlHelper.printElementNames(this.streamFeatures));
910 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
911 }
912 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
913 && account.isOptionSet(Account.OPTION_REGISTER)) {
914 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
915 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL_2)
916 && shouldAuthenticate
917 && isSecure) {
918 authenticate(SaslMechanism.Version.SASL_2);
919 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
920 && shouldAuthenticate
921 && isSecure) {
922 authenticate(SaslMechanism.Version.SASL);
923 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion)
924 && streamId != null) {
925 if (Config.EXTENDED_SM_LOGGING) {
926 Log.d(
927 Config.LOGTAG,
928 account.getJid().asBareJid()
929 + ": resuming after stanza #"
930 + stanzasReceived);
931 }
932 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
933 this.mSmCatchupMessageCounter.set(0);
934 this.mWaitingForSmCatchup.set(true);
935 this.tagWriter.writeStanzaAsync(resume);
936 } else if (needsBinding) {
937 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
938 sendBindRequest();
939 } else {
940 Log.d(
941 Config.LOGTAG,
942 account.getJid().asBareJid()
943 + ": unable to find bind feature "
944 + XmlHelper.printElementNames(this.streamFeatures));
945 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
946 }
947 }
948 }
949
950 private void authenticate(final SaslMechanism.Version version) throws IOException {
951 final List<String> mechanisms = extractMechanisms(streamFeatures.findChild("mechanisms"));
952 if (mechanisms.contains(External.MECHANISM) && account.getPrivateKeyAlias() != null) {
953 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
954 } else if (mechanisms.contains(ScramSha512.MECHANISM)) {
955 saslMechanism = new ScramSha512(tagWriter, account, mXmppConnectionService.getRNG());
956 } else if (mechanisms.contains(ScramSha256.MECHANISM)) {
957 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
958 } else if (mechanisms.contains(ScramSha1.MECHANISM)) {
959 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
960 } else if (mechanisms.contains(Plain.MECHANISM) && !account.getJid().getDomain().toEscapedString().equals("nimbuzz.com")) {
961 saslMechanism = new Plain(tagWriter, account);
962 } else if (mechanisms.contains(DigestMd5.MECHANISM)) {
963 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
964 } else if (mechanisms.contains(Anonymous.MECHANISM)) {
965 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
966 }
967 if (saslMechanism == null) {
968 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find supported SASL mechanism in " + mechanisms);
969 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
970 }
971 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
972 if (pinnedMechanism > saslMechanism.getPriority()) {
973 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
974 " has lower priority (" + saslMechanism.getPriority() +
975 ") than pinned priority (" + pinnedMechanism +
976 "). Possible downgrade attack?");
977 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
978 }
979 final String firstMessage = saslMechanism.getClientFirstMessage();
980 final Element authenticate;
981 if (version == SaslMechanism.Version.SASL) {
982 authenticate = new Element("auth", Namespace.SASL);
983 if (!Strings.isNullOrEmpty(firstMessage)) {
984 authenticate.setContent(firstMessage);
985 }
986 } else if (version == SaslMechanism.Version.SASL_2) {
987 authenticate = new Element("authenticate", Namespace.SASL_2);
988 if (!Strings.isNullOrEmpty(firstMessage)) {
989 authenticate.addChild("initial-response").setContent(firstMessage);
990 }
991 // TODO place to add extensions
992 } else {
993 throw new AssertionError("Missing implementation for " + version);
994 }
995
996 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with "+version+ "/" + saslMechanism.getMechanism());
997 authenticate.setAttribute("mechanism", saslMechanism.getMechanism());
998 tagWriter.writeElement(authenticate);
999 }
1000
1001 private List<String> extractMechanisms(final Element stream) {
1002 final ArrayList<String> mechanisms = new ArrayList<>(stream
1003 .getChildren().size());
1004 for (final Element child : stream.getChildren()) {
1005 mechanisms.add(child.getContent());
1006 }
1007 return mechanisms;
1008 }
1009
1010
1011 private void register() {
1012 final String preAuth = account.getKey(Account.PRE_AUTH_REGISTRATION_TOKEN);
1013 if (preAuth != null && features.invite()) {
1014 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1015 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1016 sendUnmodifiedIqPacket(preAuthRequest, (account, response) -> {
1017 if (response.getType() == IqPacket.TYPE.RESULT) {
1018 sendRegistryRequest();
1019 } else {
1020 final String error = response.getErrorCondition();
1021 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": failed to pre auth. " + error);
1022 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1023 }
1024 }, true);
1025 } else {
1026 sendRegistryRequest();
1027 }
1028 }
1029
1030 private void sendRegistryRequest() {
1031 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1032 register.query(Namespace.REGISTER);
1033 register.setTo(account.getDomain());
1034 sendUnmodifiedIqPacket(register, (account, packet) -> {
1035 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1036 return;
1037 }
1038 if (packet.getType() == IqPacket.TYPE.ERROR) {
1039 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1040 }
1041 final Element query = packet.query(Namespace.REGISTER);
1042 if (query.hasChild("username") && (query.hasChild("password"))) {
1043 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1044 final Element username = new Element("username").setContent(account.getUsername());
1045 final Element password = new Element("password").setContent(account.getPassword());
1046 register1.query(Namespace.REGISTER).addChild(username);
1047 register1.query().addChild(password);
1048 register1.setFrom(account.getJid().asBareJid());
1049 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1050 } else if (query.hasChild("x", Namespace.DATA)) {
1051 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1052 final Element blob = query.findChild("data", "urn:xmpp:bob");
1053 final String id = packet.getId();
1054 InputStream is;
1055 if (blob != null) {
1056 try {
1057 final String base64Blob = blob.getContent();
1058 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1059 is = new ByteArrayInputStream(strBlob);
1060 } catch (Exception e) {
1061 is = null;
1062 }
1063 } else {
1064 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
1065 try {
1066 final String url = data.getValue("url");
1067 final String fallbackUrl = data.getValue("captcha-fallback-url");
1068 if (url != null) {
1069 is = HttpConnectionManager.open(url, useTor);
1070 } else if (fallbackUrl != null) {
1071 is = HttpConnectionManager.open(fallbackUrl, useTor);
1072 } else {
1073 is = null;
1074 }
1075 } catch (final IOException e) {
1076 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to fetch captcha", e);
1077 is = null;
1078 }
1079 }
1080
1081 if (is != null) {
1082 Bitmap captcha = BitmapFactory.decodeStream(is);
1083 try {
1084 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
1085 return;
1086 }
1087 } catch (Exception e) {
1088 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1089 }
1090 }
1091 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1092 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
1093 final String instructions = query.findChildContent("instructions");
1094 final Element oob = query.findChild("x", Namespace.OOB);
1095 final String url = oob == null ? null : oob.findChildContent("url");
1096 if (url != null) {
1097 setAccountCreationFailed(url);
1098 } else if (instructions != null) {
1099 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1100 if (matcher.find()) {
1101 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
1102 }
1103 }
1104 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1105 }
1106 }, true);
1107 }
1108
1109 private void setAccountCreationFailed(final String url) {
1110 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1111 if (httpUrl != null && httpUrl.isHttps()) {
1112 this.redirectionUrl = httpUrl;
1113 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1114 }
1115 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1116 }
1117
1118 public HttpUrl getRedirectionUrl() {
1119 return this.redirectionUrl;
1120 }
1121
1122 public void resetEverything() {
1123 resetAttemptCount(true);
1124 resetStreamId();
1125 clearIqCallbacks();
1126 this.stanzasSent = 0;
1127 mStanzaQueue.clear();
1128 this.redirectionUrl = null;
1129 synchronized (this.disco) {
1130 disco.clear();
1131 }
1132 synchronized (this.commands) {
1133 this.commands.clear();
1134 }
1135 }
1136
1137 private void sendBindRequest() {
1138 try {
1139 mXmppConnectionService.restoredFromDatabaseLatch.await();
1140 } catch (InterruptedException e) {
1141 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1142 return;
1143 }
1144 clearIqCallbacks();
1145 if (account.getJid().isBareJid()) {
1146 account.setResource(this.createNewResource());
1147 } else {
1148 fixResource(mXmppConnectionService, account);
1149 }
1150 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1151 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1152 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1153 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1154 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1155 return;
1156 }
1157 final Element bind = packet.findChild("bind");
1158 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1159 isBound = true;
1160 final Element jid = bind.findChild("jid");
1161 if (jid != null && jid.getContent() != null) {
1162 try {
1163 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1164 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1165 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1166 throw new StateChangingError(Account.State.BIND_FAILURE);
1167 }
1168 if (account.setJid(assignedJid)) {
1169 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1170 mXmppConnectionService.databaseBackend.updateAccount(account);
1171 }
1172 if (streamFeatures.hasChild("session")
1173 && !streamFeatures.findChild("session").hasChild("optional")) {
1174 sendStartSession();
1175 } else {
1176 sendPostBindInitialization();
1177 }
1178 return;
1179 } catch (final IllegalArgumentException e) {
1180 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1181 }
1182 } else {
1183 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1184 }
1185 } else {
1186 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet);
1187 }
1188 final Element error = packet.findChild("error");
1189 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1190 account.setResource(createNewResource());
1191 }
1192 throw new StateChangingError(Account.State.BIND_FAILURE);
1193 }, true);
1194 }
1195
1196 private void clearIqCallbacks() {
1197 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1198 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1199 synchronized (this.packetCallbacks) {
1200 if (this.packetCallbacks.size() == 0) {
1201 return;
1202 }
1203 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1204 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1205 while (iterator.hasNext()) {
1206 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1207 callbacks.add(entry.second);
1208 iterator.remove();
1209 }
1210 }
1211 for (OnIqPacketReceived callback : callbacks) {
1212 try {
1213 callback.onIqPacketReceived(account, failurePacket);
1214 } catch (StateChangingError error) {
1215 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1216 //ignore
1217 }
1218 }
1219 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1220 }
1221
1222 public void sendDiscoTimeout() {
1223 if (mWaitForDisco.compareAndSet(true, false)) {
1224 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1225 finalizeBind();
1226 }
1227 }
1228
1229 private void sendStartSession() {
1230 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1231 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1232 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1233 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1234 if (packet.getType() == IqPacket.TYPE.RESULT) {
1235 sendPostBindInitialization();
1236 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1237 throw new StateChangingError(Account.State.SESSION_FAILURE);
1238 }
1239 }, true);
1240 }
1241
1242 private void sendPostBindInitialization() {
1243 smVersion = 0;
1244 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1245 smVersion = 3;
1246 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1247 smVersion = 2;
1248 }
1249 if (smVersion != 0) {
1250 synchronized (this.mStanzaQueue) {
1251 final EnablePacket enable = new EnablePacket(smVersion);
1252 tagWriter.writeStanzaAsync(enable);
1253 stanzasSent = 0;
1254 mStanzaQueue.clear();
1255 }
1256 }
1257 features.carbonsEnabled = false;
1258 features.blockListRequested = false;
1259 synchronized (this.disco) {
1260 this.disco.clear();
1261 }
1262 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1263 mPendingServiceDiscoveries.set(0);
1264 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain().toEscapedString())) {
1265 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1266 mWaitForDisco.set(false);
1267 } else {
1268 mWaitForDisco.set(true);
1269 }
1270 lastDiscoStarted = SystemClock.elapsedRealtime();
1271 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1272 Element caps = streamFeatures.findChild("c");
1273 final String hash = caps == null ? null : caps.getAttribute("hash");
1274 final String ver = caps == null ? null : caps.getAttribute("ver");
1275 ServiceDiscoveryResult discoveryResult = null;
1276 if (hash != null && ver != null) {
1277 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1278 }
1279 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1280 if (requestDiscoItemsFirst) {
1281 sendServiceDiscoveryItems(account.getDomain());
1282 }
1283 if (discoveryResult == null) {
1284 sendServiceDiscoveryInfo(account.getDomain());
1285 } else {
1286 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1287 disco.put(account.getDomain(), discoveryResult);
1288 }
1289 discoverMamPreferences();
1290 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1291 if (!requestDiscoItemsFirst) {
1292 sendServiceDiscoveryItems(account.getDomain());
1293 }
1294
1295 if (!mWaitForDisco.get()) {
1296 finalizeBind();
1297 }
1298 this.lastSessionStarted = SystemClock.elapsedRealtime();
1299 }
1300
1301 private void sendServiceDiscoveryInfo(final Jid jid) {
1302 mPendingServiceDiscoveries.incrementAndGet();
1303 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1304 iq.setTo(jid);
1305 iq.query("http://jabber.org/protocol/disco#info");
1306 this.sendIqPacket(iq, (account, packet) -> {
1307 if (packet.getType() == IqPacket.TYPE.RESULT) {
1308 boolean advancedStreamFeaturesLoaded;
1309 synchronized (XmppConnection.this.disco) {
1310 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1311 if (jid.equals(account.getDomain())) {
1312 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1313 }
1314 disco.put(jid, result);
1315 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain())
1316 && disco.containsKey(account.getJid().asBareJid());
1317 }
1318 if (advancedStreamFeaturesLoaded && (jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid()))) {
1319 enableAdvancedStreamFeatures();
1320 }
1321 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1322 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1323 final boolean serverOrAccount = jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid());
1324 final boolean advancedStreamFeaturesLoaded;
1325 if (serverOrAccount) {
1326 synchronized (XmppConnection.this.disco) {
1327 disco.put(jid, ServiceDiscoveryResult.empty());
1328 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain()) && disco.containsKey(account.getJid().asBareJid());
1329 }
1330 } else {
1331 advancedStreamFeaturesLoaded = false;
1332 }
1333 if (advancedStreamFeaturesLoaded) {
1334 enableAdvancedStreamFeatures();
1335 }
1336 }
1337 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1338 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1339 && mWaitForDisco.compareAndSet(true, false)) {
1340 finalizeBind();
1341 }
1342 }
1343 });
1344 }
1345
1346 private void discoverMamPreferences() {
1347 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1348 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1349 sendIqPacket(request, (account, response) -> {
1350 if (response.getType() == IqPacket.TYPE.RESULT) {
1351 Element prefs = response.findChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1352 isMamPreferenceAlways = "always".equals(prefs == null ? null : prefs.getAttribute("default"));
1353 }
1354 });
1355 }
1356
1357 private void discoverCommands() {
1358 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1359 request.setTo(account.getDomain());
1360 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1361 sendIqPacket(request, (account, response) -> {
1362 if (response.getType() == IqPacket.TYPE.RESULT) {
1363 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1364 if (query == null) {
1365 return;
1366 }
1367 final HashMap<String, Jid> commands = new HashMap<>();
1368 for (final Element child : query.getChildren()) {
1369 if ("item".equals(child.getName())) {
1370 final String node = child.getAttribute("node");
1371 final Jid jid = child.getAttributeAsJid("jid");
1372 if (node != null && jid != null) {
1373 commands.put(node, jid);
1374 }
1375 }
1376 }
1377 Log.d(Config.LOGTAG, commands.toString());
1378 synchronized (this.commands) {
1379 this.commands.clear();
1380 this.commands.putAll(commands);
1381 }
1382 }
1383 });
1384 }
1385
1386 public boolean isMamPreferenceAlways() {
1387 return isMamPreferenceAlways;
1388 }
1389
1390 private void finalizeBind() {
1391 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1392 if (bindListener != null) {
1393 bindListener.onBind(account);
1394 }
1395 changeStatus(Account.State.ONLINE);
1396 }
1397
1398 private void enableAdvancedStreamFeatures() {
1399 if (getFeatures().blocking() && !features.blockListRequested) {
1400 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1401 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1402 }
1403 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1404 listener.onAdvancedStreamFeaturesAvailable(account);
1405 }
1406 if (getFeatures().carbons() && !features.carbonsEnabled) {
1407 sendEnableCarbons();
1408 }
1409 if (getFeatures().commands()) {
1410 discoverCommands();
1411 }
1412 }
1413
1414 private void sendServiceDiscoveryItems(final Jid server) {
1415 mPendingServiceDiscoveries.incrementAndGet();
1416 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1417 iq.setTo(server.getDomain());
1418 iq.query("http://jabber.org/protocol/disco#items");
1419 this.sendIqPacket(iq, (account, packet) -> {
1420 if (packet.getType() == IqPacket.TYPE.RESULT) {
1421 final HashSet<Jid> items = new HashSet<>();
1422 final List<Element> elements = packet.query().getChildren();
1423 for (final Element element : elements) {
1424 if (element.getName().equals("item")) {
1425 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1426 if (jid != null && !jid.equals(account.getDomain())) {
1427 items.add(jid);
1428 }
1429 }
1430 }
1431 for (Jid jid : items) {
1432 sendServiceDiscoveryInfo(jid);
1433 }
1434 } else {
1435 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1436 }
1437 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1438 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1439 && mWaitForDisco.compareAndSet(true, false)) {
1440 finalizeBind();
1441 }
1442 }
1443 });
1444 }
1445
1446 private void sendEnableCarbons() {
1447 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1448 iq.addChild("enable", "urn:xmpp:carbons:2");
1449 this.sendIqPacket(iq, (account, packet) -> {
1450 if (!packet.hasChild("error")) {
1451 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1452 + ": successfully enabled carbons");
1453 features.carbonsEnabled = true;
1454 } else {
1455 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1456 + ": could not enable carbons " + packet);
1457 }
1458 });
1459 }
1460
1461 private void processStreamError(final Tag currentTag) throws IOException {
1462 final Element streamError = tagReader.readElement(currentTag);
1463 if (streamError == null) {
1464 return;
1465 }
1466 if (streamError.hasChild("conflict")) {
1467 account.setResource(createNewResource());
1468 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1469 throw new IOException();
1470 } else if (streamError.hasChild("host-unknown")) {
1471 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1472 } else if (streamError.hasChild("policy-violation")) {
1473 this.lastConnect = SystemClock.elapsedRealtime();
1474 final String text = streamError.findChildContent("text");
1475 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1476 failPendingMessages(text);
1477 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1478 } else {
1479 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
1480 throw new StateChangingException(Account.State.STREAM_ERROR);
1481 }
1482 }
1483
1484 private void failPendingMessages(final String error) {
1485 synchronized (this.mStanzaQueue) {
1486 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1487 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1488 if (stanza instanceof MessagePacket) {
1489 final MessagePacket packet = (MessagePacket) stanza;
1490 final String id = packet.getId();
1491 final Jid to = packet.getTo();
1492 mXmppConnectionService.markMessage(account,
1493 to.asBareJid(),
1494 id,
1495 Message.STATUS_SEND_FAILED,
1496 error);
1497 }
1498 }
1499 }
1500 }
1501
1502 private void sendStartStream() throws IOException {
1503 final Tag stream = Tag.start("stream:stream");
1504 stream.setAttribute("to", account.getServer());
1505 stream.setAttribute("version", "1.0");
1506 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1507 stream.setAttribute("xmlns", "jabber:client");
1508 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1509 tagWriter.writeTag(stream);
1510 }
1511
1512 private String createNewResource() {
1513 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1514 }
1515
1516 private String nextRandomId() {
1517 return nextRandomId(false);
1518 }
1519
1520 private String nextRandomId(boolean s) {
1521 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1522 }
1523
1524 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1525 packet.setFrom(account.getJid());
1526 return this.sendUnmodifiedIqPacket(packet, callback, false);
1527 }
1528
1529 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1530 if (packet.getId() == null) {
1531 packet.setAttribute("id", nextRandomId());
1532 }
1533 if (callback != null) {
1534 synchronized (this.packetCallbacks) {
1535 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1536 }
1537 }
1538 this.sendPacket(packet, force);
1539 return packet.getId();
1540 }
1541
1542 public void sendMessagePacket(final MessagePacket packet) {
1543 this.sendPacket(packet);
1544 }
1545
1546 public void sendPresencePacket(final PresencePacket packet) {
1547 this.sendPacket(packet);
1548 }
1549
1550 private synchronized void sendPacket(final AbstractStanza packet) {
1551 sendPacket(packet, false);
1552 }
1553
1554 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1555 if (stanzasSent == Integer.MAX_VALUE) {
1556 resetStreamId();
1557 disconnect(true);
1558 return;
1559 }
1560 synchronized (this.mStanzaQueue) {
1561 if (force || isBound) {
1562 tagWriter.writeStanzaAsync(packet);
1563 } else {
1564 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1565 }
1566 if (packet instanceof AbstractAcknowledgeableStanza) {
1567 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1568
1569 if (this.mStanzaQueue.size() != 0) {
1570 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1571 if (currentHighestKey != stanzasSent) {
1572 throw new AssertionError("Stanza count messed up");
1573 }
1574 }
1575
1576 ++stanzasSent;
1577 this.mStanzaQueue.append(stanzasSent, stanza);
1578 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1579 if (Config.EXTENDED_SM_LOGGING) {
1580 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1581 }
1582 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1583 }
1584 }
1585 }
1586 }
1587
1588 public void sendPing() {
1589 if (!r()) {
1590 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1591 iq.setFrom(account.getJid());
1592 iq.addChild("ping", Namespace.PING);
1593 this.sendIqPacket(iq, null);
1594 }
1595 this.lastPingSent = SystemClock.elapsedRealtime();
1596 }
1597
1598 public void setOnMessagePacketReceivedListener(
1599 final OnMessagePacketReceived listener) {
1600 this.messageListener = listener;
1601 }
1602
1603 public void setOnUnregisteredIqPacketReceivedListener(
1604 final OnIqPacketReceived listener) {
1605 this.unregisteredIqListener = listener;
1606 }
1607
1608 public void setOnPresencePacketReceivedListener(
1609 final OnPresencePacketReceived listener) {
1610 this.presenceListener = listener;
1611 }
1612
1613 public void setOnJinglePacketReceivedListener(
1614 final OnJinglePacketReceived listener) {
1615 this.jingleListener = listener;
1616 }
1617
1618 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1619 this.statusListener = listener;
1620 }
1621
1622 public void setOnBindListener(final OnBindListener listener) {
1623 this.bindListener = listener;
1624 }
1625
1626 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1627 this.acknowledgedListener = listener;
1628 }
1629
1630 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1631 this.advancedStreamFeaturesLoadedListeners.add(listener);
1632 }
1633
1634 private void forceCloseSocket() {
1635 FileBackend.close(this.socket);
1636 FileBackend.close(this.tagReader);
1637 }
1638
1639 public void interrupt() {
1640 if (this.mThread != null) {
1641 this.mThread.interrupt();
1642 }
1643 }
1644
1645 public void disconnect(final boolean force) {
1646 interrupt();
1647 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
1648 if (force) {
1649 forceCloseSocket();
1650 } else {
1651 final TagWriter currentTagWriter = this.tagWriter;
1652 if (currentTagWriter.isActive()) {
1653 currentTagWriter.finish();
1654 final Socket currentSocket = this.socket;
1655 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1656 try {
1657 currentTagWriter.await(1, TimeUnit.SECONDS);
1658 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1659 currentTagWriter.writeTag(Tag.end("stream:stream"));
1660 if (streamCountDownLatch != null) {
1661 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1662 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1663 } else {
1664 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1665 }
1666 }
1667 } catch (InterruptedException e) {
1668 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1669 } catch (final IOException e) {
1670 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1671 } finally {
1672 FileBackend.close(currentSocket);
1673 }
1674 } else {
1675 forceCloseSocket();
1676 }
1677 }
1678 }
1679
1680 private void resetStreamId() {
1681 this.streamId = null;
1682 }
1683
1684 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1685 synchronized (this.disco) {
1686 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1687 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1688 if (cursor.getValue().getFeatures().contains(feature)) {
1689 items.add(cursor);
1690 }
1691 }
1692 return items;
1693 }
1694 }
1695
1696 public Jid findDiscoItemByFeature(final String feature) {
1697 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1698 if (items.size() >= 1) {
1699 return items.get(0).getKey();
1700 }
1701 return null;
1702 }
1703
1704 public boolean r() {
1705 if (getFeatures().sm()) {
1706 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1707 return true;
1708 } else {
1709 return false;
1710 }
1711 }
1712
1713 public List<String> getMucServersWithholdAccount() {
1714 final List<String> servers = getMucServers();
1715 servers.remove(account.getDomain().toEscapedString());
1716 return servers;
1717 }
1718
1719 public List<String> getMucServers() {
1720 List<String> servers = new ArrayList<>();
1721 synchronized (this.disco) {
1722 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1723 final ServiceDiscoveryResult value = cursor.getValue();
1724 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1725 && value.hasIdentity("conference", "text")
1726 && !value.getFeatures().contains("jabber:iq:gateway")
1727 && !value.hasIdentity("conference", "irc")) {
1728 servers.add(cursor.getKey().toString());
1729 }
1730 }
1731 }
1732 return servers;
1733 }
1734
1735 public String getMucServer() {
1736 List<String> servers = getMucServers();
1737 return servers.size() > 0 ? servers.get(0) : null;
1738 }
1739
1740 public int getTimeToNextAttempt() {
1741 final int additionalTime = account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
1742 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
1743 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1744 return interval - secondsSinceLast;
1745 }
1746
1747 public int getAttempt() {
1748 return this.attempt;
1749 }
1750
1751 public Features getFeatures() {
1752 return this.features;
1753 }
1754
1755 public long getLastSessionEstablished() {
1756 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1757 return System.currentTimeMillis() - diff;
1758 }
1759
1760 public long getLastConnect() {
1761 return this.lastConnect;
1762 }
1763
1764 public long getLastPingSent() {
1765 return this.lastPingSent;
1766 }
1767
1768 public long getLastDiscoStarted() {
1769 return this.lastDiscoStarted;
1770 }
1771
1772 public long getLastPacketReceived() {
1773 return this.lastPacketReceived;
1774 }
1775
1776 public void sendActive() {
1777 this.sendPacket(new ActivePacket());
1778 }
1779
1780 public void sendInactive() {
1781 this.sendPacket(new InactivePacket());
1782 }
1783
1784 public void resetAttemptCount(boolean resetConnectTime) {
1785 this.attempt = 0;
1786 if (resetConnectTime) {
1787 this.lastConnect = 0;
1788 }
1789 }
1790
1791 public void setInteractive(boolean interactive) {
1792 this.mInteractive = interactive;
1793 }
1794
1795 public Identity getServerIdentity() {
1796 synchronized (this.disco) {
1797 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
1798 if (result == null) {
1799 return Identity.UNKNOWN;
1800 }
1801 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1802 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1803 switch (id.getName()) {
1804 case "Prosody":
1805 return Identity.PROSODY;
1806 case "ejabberd":
1807 return Identity.EJABBERD;
1808 case "Slack-XMPP":
1809 return Identity.SLACK;
1810 }
1811 }
1812 }
1813 }
1814 return Identity.UNKNOWN;
1815 }
1816
1817 private IqGenerator getIqGenerator() {
1818 return mXmppConnectionService.getIqGenerator();
1819 }
1820
1821 public enum Identity {
1822 FACEBOOK,
1823 SLACK,
1824 EJABBERD,
1825 PROSODY,
1826 NIMBUZZ,
1827 UNKNOWN
1828 }
1829
1830 private class MyKeyManager implements X509KeyManager {
1831 @Override
1832 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1833 return account.getPrivateKeyAlias();
1834 }
1835
1836 @Override
1837 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1838 return null;
1839 }
1840
1841 @Override
1842 public X509Certificate[] getCertificateChain(String alias) {
1843 Log.d(Config.LOGTAG, "getting certificate chain");
1844 try {
1845 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1846 } catch (final Exception e) {
1847 Log.d(Config.LOGTAG, "could not get certificate chain", e);
1848 return new X509Certificate[0];
1849 }
1850 }
1851
1852 @Override
1853 public String[] getClientAliases(String s, Principal[] principals) {
1854 final String alias = account.getPrivateKeyAlias();
1855 return alias != null ? new String[]{alias} : new String[0];
1856 }
1857
1858 @Override
1859 public String[] getServerAliases(String s, Principal[] principals) {
1860 return new String[0];
1861 }
1862
1863 @Override
1864 public PrivateKey getPrivateKey(String alias) {
1865 try {
1866 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1867 } catch (Exception e) {
1868 return null;
1869 }
1870 }
1871 }
1872
1873 private static class StateChangingError extends Error {
1874 private final Account.State state;
1875
1876 public StateChangingError(Account.State state) {
1877 this.state = state;
1878 }
1879 }
1880
1881 private static class StateChangingException extends IOException {
1882 private final Account.State state;
1883
1884 public StateChangingException(Account.State state) {
1885 this.state = state;
1886 }
1887 }
1888
1889 public class Features {
1890 XmppConnection connection;
1891 private boolean carbonsEnabled = false;
1892 private boolean encryptionEnabled = false;
1893 private boolean blockListRequested = false;
1894
1895 public Features(final XmppConnection connection) {
1896 this.connection = connection;
1897 }
1898
1899 private boolean hasDiscoFeature(final Jid server, final String feature) {
1900 synchronized (XmppConnection.this.disco) {
1901 return connection.disco.containsKey(server) &&
1902 connection.disco.get(server).getFeatures().contains(feature);
1903 }
1904 }
1905
1906 public boolean carbons() {
1907 return hasDiscoFeature(account.getDomain(), "urn:xmpp:carbons:2");
1908 }
1909
1910 public boolean commands() {
1911 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
1912 }
1913
1914 public boolean easyOnboardingInvites() {
1915 synchronized (commands) {
1916 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
1917 }
1918 }
1919
1920 public boolean bookmarksConversion() {
1921 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1922 }
1923
1924 public boolean avatarConversion() {
1925 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION) && pepPublishOptions();
1926 }
1927
1928 public boolean blocking() {
1929 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
1930 }
1931
1932 public boolean spamReporting() {
1933 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
1934 }
1935
1936 public boolean flexibleOfflineMessageRetrieval() {
1937 return hasDiscoFeature(account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
1938 }
1939
1940 public boolean register() {
1941 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
1942 }
1943
1944 public boolean invite() {
1945 return connection.streamFeatures != null && connection.streamFeatures.hasChild("register", Namespace.INVITE);
1946 }
1947
1948 public boolean sm() {
1949 return streamId != null
1950 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1951 }
1952
1953 public boolean csi() {
1954 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1955 }
1956
1957 public boolean pep() {
1958 synchronized (XmppConnection.this.disco) {
1959 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1960 return info != null && info.hasIdentity("pubsub", "pep");
1961 }
1962 }
1963
1964 public boolean pepPersistent() {
1965 synchronized (XmppConnection.this.disco) {
1966 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1967 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1968 }
1969 }
1970
1971 public boolean pepPublishOptions() {
1972 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
1973 }
1974
1975 public boolean pepOmemoWhitelisted() {
1976 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
1977 }
1978
1979 public boolean mam() {
1980 return MessageArchiveService.Version.has(getAccountFeatures());
1981 }
1982
1983 public List<String> getAccountFeatures() {
1984 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
1985 return result == null ? Collections.emptyList() : result.getFeatures();
1986 }
1987
1988 public boolean push() {
1989 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
1990 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
1991 }
1992
1993 public boolean rosterVersioning() {
1994 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1995 }
1996
1997 public void setBlockListRequested(boolean value) {
1998 this.blockListRequested = value;
1999 }
2000
2001 public boolean httpUpload(long filesize) {
2002 if (Config.DISABLE_HTTP_UPLOAD) {
2003 return false;
2004 } else {
2005 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2006 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2007 if (items.size() > 0) {
2008 try {
2009 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2010 if (filesize <= maxsize) {
2011 return true;
2012 } else {
2013 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
2014 return false;
2015 }
2016 } catch (Exception e) {
2017 return true;
2018 }
2019 }
2020 }
2021 return false;
2022 }
2023 }
2024
2025 public boolean useLegacyHttpUpload() {
2026 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2027 }
2028
2029 public long getMaxHttpUploadSize() {
2030 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2031 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2032 if (items.size() > 0) {
2033 try {
2034 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2035 } catch (Exception e) {
2036 //ignored
2037 }
2038 }
2039 }
2040 return -1;
2041 }
2042
2043 public boolean stanzaIds() {
2044 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2045 }
2046
2047 public boolean bookmarks2() {
2048 return Config.USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
2049 }
2050
2051 public boolean externalServiceDiscovery() {
2052 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2053 }
2054 }
2055}