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 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 =
503 success.findChildContent("authorization-identifier");
504 Log.d(
505 Config.LOGTAG,
506 account.getJid().asBareJid()
507 + ": SASL 2.0 authorization identifier was "
508 + authorizationIdentifier);
509 }
510 if (version == SaslMechanism.Version.SASL) {
511 tagReader.reset();
512 sendStartStream();
513 final Tag tag = tagReader.readTag();
514 if (tag != null && tag.isStart("stream")) {
515 processStream();
516 } else {
517 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
518 }
519 break;
520 }
521 } else if (nextTag.isStart("failure", Namespace.TLS)) {
522 throw new StateChangingException(Account.State.TLS_ERROR);
523 } else if (nextTag.isStart("failure")) {
524 final Element failure = tagReader.readElement(nextTag);
525 final SaslMechanism.Version version;
526 try {
527 version = SaslMechanism.Version.of(failure);
528 } catch (final IllegalArgumentException e) {
529 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
530 }
531 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
532 if (failure.hasChild("temporary-auth-failure")) {
533 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
534 } else if (failure.hasChild("account-disabled")) {
535 final String text = failure.findChildContent("text");
536 if (Strings.isNullOrEmpty(text)) {
537 throw new StateChangingException(Account.State.UNAUTHORIZED);
538 }
539 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
540 if (matcher.find()) {
541 final HttpUrl url;
542 try {
543 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
544 } catch (final IllegalArgumentException e) {
545 throw new StateChangingException(Account.State.UNAUTHORIZED);
546 }
547 if (url.isHttps()) {
548 this.redirectionUrl = url;
549 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
550 }
551 }
552 }
553 throw new StateChangingException(Account.State.UNAUTHORIZED);
554 } else if (nextTag.isStart("continue", Namespace.SASL_2)) {
555 throw new StateChangingException(Account.State.INCOMPATIBLE_CLIENT);
556 } else if (nextTag.isStart("challenge")) {
557 final Element challenge = tagReader.readElement(nextTag);
558 final SaslMechanism.Version version;
559 try {
560 version = SaslMechanism.Version.of(challenge);
561 } catch (final IllegalArgumentException e) {
562 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
563 }
564 final Element response;
565 if (version == SaslMechanism.Version.SASL) {
566 response = new Element("response", Namespace.SASL);
567 } else if (version == SaslMechanism.Version.SASL_2) {
568 response = new Element("response", Namespace.SASL_2);
569 } else {
570 throw new AssertionError("Missing implementation for " + version);
571 }
572 try {
573 response.setContent(saslMechanism.getResponse(challenge.getContent()));
574 } catch (final SaslMechanism.AuthenticationException e) {
575 // TODO: Send auth abort tag.
576 Log.e(Config.LOGTAG, e.toString());
577 throw new StateChangingException(Account.State.UNAUTHORIZED);
578 }
579 tagWriter.writeElement(response);
580 } else if (nextTag.isStart("enabled")) {
581 final Element enabled = tagReader.readElement(nextTag);
582 if ("true".equals(enabled.getAttribute("resume"))) {
583 this.streamId = enabled.getAttribute("id");
584 Log.d(
585 Config.LOGTAG,
586 account.getJid().asBareJid().toString()
587 + ": stream management("
588 + smVersion
589 + ") enabled (resumable)");
590 } else {
591 Log.d(
592 Config.LOGTAG,
593 account.getJid().asBareJid().toString()
594 + ": stream management("
595 + smVersion
596 + ") enabled");
597 }
598 this.stanzasReceived = 0;
599 this.inSmacksSession = true;
600 final RequestPacket r = new RequestPacket(smVersion);
601 tagWriter.writeStanzaAsync(r);
602 } else if (nextTag.isStart("resumed")) {
603 this.inSmacksSession = true;
604 this.isBound = true;
605 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
606 lastPacketReceived = SystemClock.elapsedRealtime();
607 final Element resumed = tagReader.readElement(nextTag);
608 final String h = resumed.getAttribute("h");
609 try {
610 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
611 final boolean acknowledgedMessages;
612 synchronized (this.mStanzaQueue) {
613 final int serverCount = Integer.parseInt(h);
614 if (serverCount < stanzasSent) {
615 Log.d(
616 Config.LOGTAG,
617 account.getJid().asBareJid().toString()
618 + ": session resumed with lost packages");
619 stanzasSent = serverCount;
620 } else {
621 Log.d(
622 Config.LOGTAG,
623 account.getJid().asBareJid().toString() + ": session resumed");
624 }
625 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
626 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
627 failedStanzas.add(mStanzaQueue.valueAt(i));
628 }
629 mStanzaQueue.clear();
630 }
631 if (acknowledgedMessages) {
632 mXmppConnectionService.updateConversationUi();
633 }
634 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
635 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
636 if (packet instanceof MessagePacket) {
637 MessagePacket message = (MessagePacket) packet;
638 mXmppConnectionService.markMessage(
639 account,
640 message.getTo().asBareJid(),
641 message.getId(),
642 Message.STATUS_UNSEND);
643 }
644 sendPacket(packet);
645 }
646 } catch (final NumberFormatException ignored) {
647 }
648 Log.d(
649 Config.LOGTAG,
650 account.getJid().asBareJid()
651 + ": online with resource "
652 + account.getResource());
653 changeStatus(Account.State.ONLINE);
654 } else if (nextTag.isStart("r")) {
655 tagReader.readElement(nextTag);
656 if (Config.EXTENDED_SM_LOGGING) {
657 Log.d(
658 Config.LOGTAG,
659 account.getJid().asBareJid()
660 + ": acknowledging stanza #"
661 + this.stanzasReceived);
662 }
663 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
664 tagWriter.writeStanzaAsync(ack);
665 } else if (nextTag.isStart("a")) {
666 boolean accountUiNeedsRefresh = false;
667 synchronized (NotificationService.CATCHUP_LOCK) {
668 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
669 final int messageCount = mSmCatchupMessageCounter.get();
670 final int pendingIQs = packetCallbacks.size();
671 Log.d(
672 Config.LOGTAG,
673 account.getJid().asBareJid()
674 + ": SM catchup complete (messages="
675 + messageCount
676 + ", pending IQs="
677 + pendingIQs
678 + ")");
679 accountUiNeedsRefresh = true;
680 if (messageCount > 0) {
681 mXmppConnectionService
682 .getNotificationService()
683 .finishBacklog(true, account);
684 }
685 }
686 }
687 if (accountUiNeedsRefresh) {
688 mXmppConnectionService.updateAccountUi();
689 }
690 final Element ack = tagReader.readElement(nextTag);
691 lastPacketReceived = SystemClock.elapsedRealtime();
692 try {
693 final boolean acknowledgedMessages;
694 synchronized (this.mStanzaQueue) {
695 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
696 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
697 }
698 if (acknowledgedMessages) {
699 mXmppConnectionService.updateConversationUi();
700 }
701 } catch (NumberFormatException | NullPointerException e) {
702 Log.d(
703 Config.LOGTAG,
704 account.getJid().asBareJid()
705 + ": server send ack without sequence number");
706 }
707 } else if (nextTag.isStart("failed")) {
708 Element failed = tagReader.readElement(nextTag);
709 try {
710 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
711 Log.d(
712 Config.LOGTAG,
713 account.getJid().asBareJid()
714 + ": resumption failed but server acknowledged stanza #"
715 + serverCount);
716 final boolean acknowledgedMessages;
717 synchronized (this.mStanzaQueue) {
718 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
719 }
720 if (acknowledgedMessages) {
721 mXmppConnectionService.updateConversationUi();
722 }
723 } catch (NumberFormatException | NullPointerException e) {
724 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
725 }
726 resetStreamId();
727 sendBindRequest();
728 } else if (nextTag.isStart("iq")) {
729 processIq(nextTag);
730 } else if (nextTag.isStart("message")) {
731 processMessage(nextTag);
732 } else if (nextTag.isStart("presence")) {
733 processPresence(nextTag);
734 }
735 nextTag = tagReader.readTag();
736 }
737 if (nextTag != null && nextTag.isEnd("stream")) {
738 streamCountDownLatch.countDown();
739 }
740 }
741
742 private boolean acknowledgeStanzaUpTo(int serverCount) {
743 if (serverCount > stanzasSent) {
744 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
745 }
746 boolean acknowledgedMessages = false;
747 for (int i = 0; i < mStanzaQueue.size(); ++i) {
748 if (serverCount >= mStanzaQueue.keyAt(i)) {
749 if (Config.EXTENDED_SM_LOGGING) {
750 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
751 }
752 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
753 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
754 final MessagePacket packet = (MessagePacket) stanza;
755 final String id = packet.getId();
756 final Jid to = packet.getTo();
757 if (id != null && to != null) {
758 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, to, id);
759 }
760 }
761 mStanzaQueue.removeAt(i);
762 i--;
763 }
764 }
765 return acknowledgedMessages;
766 }
767
768 private @NonNull
769 Element processPacket(final Tag currentTag, final int packetType) throws IOException {
770 final Element element;
771 switch (packetType) {
772 case PACKET_IQ:
773 element = new IqPacket();
774 break;
775 case PACKET_MESSAGE:
776 element = new MessagePacket();
777 break;
778 case PACKET_PRESENCE:
779 element = new PresencePacket();
780 break;
781 default:
782 throw new AssertionError("Should never encounter invalid type");
783 }
784 element.setAttributes(currentTag.getAttributes());
785 Tag nextTag = tagReader.readTag();
786 if (nextTag == null) {
787 throw new IOException("interrupted mid tag");
788 }
789 while (!nextTag.isEnd(element.getName())) {
790 if (!nextTag.isNo()) {
791 element.addChild(tagReader.readElement(nextTag));
792 }
793 nextTag = tagReader.readTag();
794 if (nextTag == null) {
795 throw new IOException("interrupted mid tag");
796 }
797 }
798 if (stanzasReceived == Integer.MAX_VALUE) {
799 resetStreamId();
800 throw new IOException("time to restart the session. cant handle >2 billion pcks");
801 }
802 if (inSmacksSession) {
803 ++stanzasReceived;
804 } else if (features.sm()) {
805 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
806 }
807 lastPacketReceived = SystemClock.elapsedRealtime();
808 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
809 Log.d(Config.LOGTAG, "[background stanza] " + element);
810 }
811 if (element instanceof IqPacket
812 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
813 && element.hasChild("jingle", Namespace.JINGLE)) {
814 return JinglePacket.upgrade((IqPacket) element);
815 } else {
816 return element;
817 }
818 }
819
820 private void processIq(final Tag currentTag) throws IOException {
821 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
822 if (!packet.valid()) {
823 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
824 return;
825 }
826 if (packet instanceof JinglePacket) {
827 if (this.jingleListener != null) {
828 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
829 }
830 } else {
831 OnIqPacketReceived callback = null;
832 synchronized (this.packetCallbacks) {
833 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
834 if (packetCallbackDuple != null) {
835 // Packets to the server should have responses from the server
836 if (packetCallbackDuple.first.toServer(account)) {
837 if (packet.fromServer(account)) {
838 callback = packetCallbackDuple.second;
839 packetCallbacks.remove(packet.getId());
840 } else {
841 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
842 }
843 } else {
844 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
845 callback = packetCallbackDuple.second;
846 packetCallbacks.remove(packet.getId());
847 } else {
848 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
849 }
850 }
851 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
852 callback = this.unregisteredIqListener;
853 }
854 }
855 if (callback != null) {
856 try {
857 callback.onIqPacketReceived(account, packet);
858 } catch (StateChangingError error) {
859 throw new StateChangingException(error.state);
860 }
861 }
862 }
863 }
864
865 private void processMessage(final Tag currentTag) throws IOException {
866 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
867 if (!packet.valid()) {
868 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
869 return;
870 }
871 this.messageListener.onMessagePacketReceived(account, packet);
872 }
873
874 private void processPresence(final Tag currentTag) throws IOException {
875 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
876 if (!packet.valid()) {
877 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
878 return;
879 }
880 this.presenceListener.onPresencePacketReceived(account, packet);
881 }
882
883 private void sendStartTLS() throws IOException {
884 final Tag startTLS = Tag.empty("starttls");
885 startTLS.setAttribute("xmlns", Namespace.TLS);
886 tagWriter.writeTag(startTLS);
887 }
888
889 private void switchOverToTls() throws XmlPullParserException, IOException {
890 tagReader.readTag();
891 final Socket socket = this.socket;
892 final SSLSocket sslSocket = upgradeSocketToTls(socket);
893 tagReader.setInputStream(sslSocket.getInputStream());
894 tagWriter.setOutputStream(sslSocket.getOutputStream());
895 sendStartStream();
896 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
897 features.encryptionEnabled = true;
898 final Tag tag = tagReader.readTag();
899 if (tag != null && tag.isStart("stream")) {
900 SSLSocketHelper.log(account, sslSocket);
901 processStream();
902 } else {
903 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
904 }
905 sslSocket.close();
906 }
907
908 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
909 final SSLSocketFactory sslSocketFactory;
910 try {
911 sslSocketFactory = getSSLSocketFactory();
912 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
913 throw new StateChangingException(Account.State.TLS_ERROR);
914 }
915 final InetAddress address = socket.getInetAddress();
916 final SSLSocket sslSocket = (SSLSocket) sslSocketFactory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
917 SSLSocketHelper.setSecurity(sslSocket);
918 SSLSocketHelper.setHostname(sslSocket, IDN.toASCII(account.getServer()));
919 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
920 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
921 try {
922 if (!xmppDomainVerifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
923 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate domain verification failed");
924 FileBackend.close(sslSocket);
925 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
926 }
927 } catch (final SSLPeerUnverifiedException e) {
928 FileBackend.close(sslSocket);
929 throw new StateChangingException(Account.State.TLS_ERROR);
930 }
931 return sslSocket;
932 }
933
934 private void processStreamFeatures(final Tag currentTag) throws IOException {
935 this.streamFeatures = tagReader.readElement(currentTag);
936 final boolean isSecure =
937 features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
938 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
939 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
940 && !features.encryptionEnabled) {
941 sendStartTLS();
942 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
943 && account.isOptionSet(Account.OPTION_REGISTER)) {
944 if (isSecure) {
945 register();
946 } else {
947 Log.d(
948 Config.LOGTAG,
949 account.getJid().asBareJid()
950 + ": unable to find STARTTLS for registration process "
951 + XmlHelper.printElementNames(this.streamFeatures));
952 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
953 }
954 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
955 && account.isOptionSet(Account.OPTION_REGISTER)) {
956 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
957 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL_2)
958 && shouldAuthenticate
959 && isSecure) {
960 authenticate(SaslMechanism.Version.SASL_2);
961 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
962 && shouldAuthenticate
963 && isSecure) {
964 authenticate(SaslMechanism.Version.SASL);
965 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion)
966 && streamId != null) {
967 if (Config.EXTENDED_SM_LOGGING) {
968 Log.d(
969 Config.LOGTAG,
970 account.getJid().asBareJid()
971 + ": resuming after stanza #"
972 + stanzasReceived);
973 }
974 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
975 this.mSmCatchupMessageCounter.set(0);
976 this.mWaitingForSmCatchup.set(true);
977 this.tagWriter.writeStanzaAsync(resume);
978 } else if (needsBinding) {
979 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
980 sendBindRequest();
981 } else {
982 Log.d(
983 Config.LOGTAG,
984 account.getJid().asBareJid()
985 + ": unable to find bind feature "
986 + XmlHelper.printElementNames(this.streamFeatures));
987 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
988 }
989 }
990 }
991
992 private void authenticate(final SaslMechanism.Version version) throws IOException {
993 final List<String> mechanisms = extractMechanisms(streamFeatures.findChild("mechanisms"));
994 if (mechanisms.contains(External.MECHANISM) && account.getPrivateKeyAlias() != null) {
995 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
996 } else if (mechanisms.contains(ScramSha512.MECHANISM)) {
997 saslMechanism = new ScramSha512(tagWriter, account, mXmppConnectionService.getRNG());
998 } else if (mechanisms.contains(ScramSha256.MECHANISM)) {
999 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
1000 } else if (mechanisms.contains(ScramSha1.MECHANISM)) {
1001 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
1002 } else if (mechanisms.contains(Plain.MECHANISM) && !account.getJid().getDomain().toEscapedString().equals("nimbuzz.com")) {
1003 saslMechanism = new Plain(tagWriter, account);
1004 } else if (mechanisms.contains(DigestMd5.MECHANISM)) {
1005 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
1006 } else if (mechanisms.contains(Anonymous.MECHANISM)) {
1007 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
1008 }
1009 if (saslMechanism == null) {
1010 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find supported SASL mechanism in " + mechanisms);
1011 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1012 }
1013 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
1014 if (pinnedMechanism > saslMechanism.getPriority()) {
1015 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
1016 " has lower priority (" + saslMechanism.getPriority() +
1017 ") than pinned priority (" + pinnedMechanism +
1018 "). Possible downgrade attack?");
1019 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1020 }
1021 final String firstMessage = saslMechanism.getClientFirstMessage();
1022 final Element authenticate;
1023 if (version == SaslMechanism.Version.SASL) {
1024 authenticate = new Element("auth", Namespace.SASL);
1025 if (!Strings.isNullOrEmpty(firstMessage)) {
1026 authenticate.setContent(firstMessage);
1027 }
1028 } else if (version == SaslMechanism.Version.SASL_2) {
1029 authenticate = new Element("authenticate", Namespace.SASL_2);
1030 if (!Strings.isNullOrEmpty(firstMessage)) {
1031 authenticate.addChild("initial-response").setContent(firstMessage);
1032 }
1033 // TODO place to add extensions
1034 } else {
1035 throw new AssertionError("Missing implementation for " + version);
1036 }
1037
1038 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with "+version+ "/" + saslMechanism.getMechanism());
1039 authenticate.setAttribute("mechanism", saslMechanism.getMechanism());
1040 tagWriter.writeElement(authenticate);
1041 }
1042
1043 private List<String> extractMechanisms(final Element stream) {
1044 final ArrayList<String> mechanisms = new ArrayList<>(stream
1045 .getChildren().size());
1046 for (final Element child : stream.getChildren()) {
1047 mechanisms.add(child.getContent());
1048 }
1049 return mechanisms;
1050 }
1051
1052
1053 private void register() {
1054 final String preAuth = account.getKey(Account.PRE_AUTH_REGISTRATION_TOKEN);
1055 if (preAuth != null && features.invite()) {
1056 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1057 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1058 sendUnmodifiedIqPacket(preAuthRequest, (account, response) -> {
1059 if (response.getType() == IqPacket.TYPE.RESULT) {
1060 sendRegistryRequest();
1061 } else {
1062 final String error = response.getErrorCondition();
1063 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": failed to pre auth. " + error);
1064 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1065 }
1066 }, true);
1067 } else {
1068 sendRegistryRequest();
1069 }
1070 }
1071
1072 private void sendRegistryRequest() {
1073 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1074 register.query(Namespace.REGISTER);
1075 register.setTo(account.getDomain());
1076 sendUnmodifiedIqPacket(register, (account, packet) -> {
1077 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1078 return;
1079 }
1080 if (packet.getType() == IqPacket.TYPE.ERROR) {
1081 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1082 }
1083 final Element query = packet.query(Namespace.REGISTER);
1084 if (query.hasChild("username") && (query.hasChild("password"))) {
1085 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1086 final Element username = new Element("username").setContent(account.getUsername());
1087 final Element password = new Element("password").setContent(account.getPassword());
1088 register1.query(Namespace.REGISTER).addChild(username);
1089 register1.query().addChild(password);
1090 register1.setFrom(account.getJid().asBareJid());
1091 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1092 } else if (query.hasChild("x", Namespace.DATA)) {
1093 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1094 final Element blob = query.findChild("data", "urn:xmpp:bob");
1095 final String id = packet.getId();
1096 InputStream is;
1097 if (blob != null) {
1098 try {
1099 final String base64Blob = blob.getContent();
1100 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1101 is = new ByteArrayInputStream(strBlob);
1102 } catch (Exception e) {
1103 is = null;
1104 }
1105 } else {
1106 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
1107 try {
1108 final String url = data.getValue("url");
1109 final String fallbackUrl = data.getValue("captcha-fallback-url");
1110 if (url != null) {
1111 is = HttpConnectionManager.open(url, useTor);
1112 } else if (fallbackUrl != null) {
1113 is = HttpConnectionManager.open(fallbackUrl, useTor);
1114 } else {
1115 is = null;
1116 }
1117 } catch (final IOException e) {
1118 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to fetch captcha", e);
1119 is = null;
1120 }
1121 }
1122
1123 if (is != null) {
1124 Bitmap captcha = BitmapFactory.decodeStream(is);
1125 try {
1126 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
1127 return;
1128 }
1129 } catch (Exception e) {
1130 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1131 }
1132 }
1133 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1134 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
1135 final String instructions = query.findChildContent("instructions");
1136 final Element oob = query.findChild("x", Namespace.OOB);
1137 final String url = oob == null ? null : oob.findChildContent("url");
1138 if (url != null) {
1139 setAccountCreationFailed(url);
1140 } else if (instructions != null) {
1141 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1142 if (matcher.find()) {
1143 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
1144 }
1145 }
1146 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1147 }
1148 }, true);
1149 }
1150
1151 private void setAccountCreationFailed(final String url) {
1152 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1153 if (httpUrl != null && httpUrl.isHttps()) {
1154 this.redirectionUrl = httpUrl;
1155 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1156 }
1157 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1158 }
1159
1160 public HttpUrl getRedirectionUrl() {
1161 return this.redirectionUrl;
1162 }
1163
1164 public void resetEverything() {
1165 resetAttemptCount(true);
1166 resetStreamId();
1167 clearIqCallbacks();
1168 this.stanzasSent = 0;
1169 mStanzaQueue.clear();
1170 this.redirectionUrl = null;
1171 synchronized (this.disco) {
1172 disco.clear();
1173 }
1174 synchronized (this.commands) {
1175 this.commands.clear();
1176 }
1177 }
1178
1179 private void sendBindRequest() {
1180 try {
1181 mXmppConnectionService.restoredFromDatabaseLatch.await();
1182 } catch (InterruptedException e) {
1183 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1184 return;
1185 }
1186 clearIqCallbacks();
1187 if (account.getJid().isBareJid()) {
1188 account.setResource(this.createNewResource());
1189 } else {
1190 fixResource(mXmppConnectionService, account);
1191 }
1192 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1193 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1194 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1195 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1196 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1197 return;
1198 }
1199 final Element bind = packet.findChild("bind");
1200 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1201 isBound = true;
1202 final Element jid = bind.findChild("jid");
1203 if (jid != null && jid.getContent() != null) {
1204 try {
1205 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1206 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1207 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1208 throw new StateChangingError(Account.State.BIND_FAILURE);
1209 }
1210 if (account.setJid(assignedJid)) {
1211 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1212 mXmppConnectionService.databaseBackend.updateAccount(account);
1213 }
1214 if (streamFeatures.hasChild("session")
1215 && !streamFeatures.findChild("session").hasChild("optional")) {
1216 sendStartSession();
1217 } else {
1218 sendPostBindInitialization();
1219 }
1220 return;
1221 } catch (final IllegalArgumentException e) {
1222 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1223 }
1224 } else {
1225 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1226 }
1227 } else {
1228 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet);
1229 }
1230 final Element error = packet.findChild("error");
1231 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1232 account.setResource(createNewResource());
1233 }
1234 throw new StateChangingError(Account.State.BIND_FAILURE);
1235 }, true);
1236 }
1237
1238 private void clearIqCallbacks() {
1239 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1240 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1241 synchronized (this.packetCallbacks) {
1242 if (this.packetCallbacks.size() == 0) {
1243 return;
1244 }
1245 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1246 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1247 while (iterator.hasNext()) {
1248 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1249 callbacks.add(entry.second);
1250 iterator.remove();
1251 }
1252 }
1253 for (OnIqPacketReceived callback : callbacks) {
1254 try {
1255 callback.onIqPacketReceived(account, failurePacket);
1256 } catch (StateChangingError error) {
1257 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1258 //ignore
1259 }
1260 }
1261 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1262 }
1263
1264 public void sendDiscoTimeout() {
1265 if (mWaitForDisco.compareAndSet(true, false)) {
1266 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1267 finalizeBind();
1268 }
1269 }
1270
1271 private void sendStartSession() {
1272 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1273 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1274 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1275 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1276 if (packet.getType() == IqPacket.TYPE.RESULT) {
1277 sendPostBindInitialization();
1278 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1279 throw new StateChangingError(Account.State.SESSION_FAILURE);
1280 }
1281 }, true);
1282 }
1283
1284 private void sendPostBindInitialization() {
1285 smVersion = 0;
1286 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1287 smVersion = 3;
1288 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1289 smVersion = 2;
1290 }
1291 if (smVersion != 0) {
1292 synchronized (this.mStanzaQueue) {
1293 final EnablePacket enable = new EnablePacket(smVersion);
1294 tagWriter.writeStanzaAsync(enable);
1295 stanzasSent = 0;
1296 mStanzaQueue.clear();
1297 }
1298 }
1299 features.carbonsEnabled = false;
1300 features.blockListRequested = false;
1301 synchronized (this.disco) {
1302 this.disco.clear();
1303 }
1304 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1305 mPendingServiceDiscoveries.set(0);
1306 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain().toEscapedString())) {
1307 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1308 mWaitForDisco.set(false);
1309 } else {
1310 mWaitForDisco.set(true);
1311 }
1312 lastDiscoStarted = SystemClock.elapsedRealtime();
1313 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1314 Element caps = streamFeatures.findChild("c");
1315 final String hash = caps == null ? null : caps.getAttribute("hash");
1316 final String ver = caps == null ? null : caps.getAttribute("ver");
1317 ServiceDiscoveryResult discoveryResult = null;
1318 if (hash != null && ver != null) {
1319 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1320 }
1321 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1322 if (requestDiscoItemsFirst) {
1323 sendServiceDiscoveryItems(account.getDomain());
1324 }
1325 if (discoveryResult == null) {
1326 sendServiceDiscoveryInfo(account.getDomain());
1327 } else {
1328 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1329 disco.put(account.getDomain(), discoveryResult);
1330 }
1331 discoverMamPreferences();
1332 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1333 if (!requestDiscoItemsFirst) {
1334 sendServiceDiscoveryItems(account.getDomain());
1335 }
1336
1337 if (!mWaitForDisco.get()) {
1338 finalizeBind();
1339 }
1340 this.lastSessionStarted = SystemClock.elapsedRealtime();
1341 }
1342
1343 private void sendServiceDiscoveryInfo(final Jid jid) {
1344 mPendingServiceDiscoveries.incrementAndGet();
1345 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1346 iq.setTo(jid);
1347 iq.query("http://jabber.org/protocol/disco#info");
1348 this.sendIqPacket(iq, (account, packet) -> {
1349 if (packet.getType() == IqPacket.TYPE.RESULT) {
1350 boolean advancedStreamFeaturesLoaded;
1351 synchronized (XmppConnection.this.disco) {
1352 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1353 if (jid.equals(account.getDomain())) {
1354 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1355 }
1356 disco.put(jid, result);
1357 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain())
1358 && disco.containsKey(account.getJid().asBareJid());
1359 }
1360 if (advancedStreamFeaturesLoaded && (jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid()))) {
1361 enableAdvancedStreamFeatures();
1362 }
1363 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1364 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1365 final boolean serverOrAccount = jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid());
1366 final boolean advancedStreamFeaturesLoaded;
1367 if (serverOrAccount) {
1368 synchronized (XmppConnection.this.disco) {
1369 disco.put(jid, ServiceDiscoveryResult.empty());
1370 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain()) && disco.containsKey(account.getJid().asBareJid());
1371 }
1372 } else {
1373 advancedStreamFeaturesLoaded = false;
1374 }
1375 if (advancedStreamFeaturesLoaded) {
1376 enableAdvancedStreamFeatures();
1377 }
1378 }
1379 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1380 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1381 && mWaitForDisco.compareAndSet(true, false)) {
1382 finalizeBind();
1383 }
1384 }
1385 });
1386 }
1387
1388 private void discoverMamPreferences() {
1389 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1390 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1391 sendIqPacket(request, (account, response) -> {
1392 if (response.getType() == IqPacket.TYPE.RESULT) {
1393 Element prefs = response.findChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1394 isMamPreferenceAlways = "always".equals(prefs == null ? null : prefs.getAttribute("default"));
1395 }
1396 });
1397 }
1398
1399 private void discoverCommands() {
1400 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1401 request.setTo(account.getDomain());
1402 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1403 sendIqPacket(request, (account, response) -> {
1404 if (response.getType() == IqPacket.TYPE.RESULT) {
1405 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1406 if (query == null) {
1407 return;
1408 }
1409 final HashMap<String, Jid> commands = new HashMap<>();
1410 for (final Element child : query.getChildren()) {
1411 if ("item".equals(child.getName())) {
1412 final String node = child.getAttribute("node");
1413 final Jid jid = child.getAttributeAsJid("jid");
1414 if (node != null && jid != null) {
1415 commands.put(node, jid);
1416 }
1417 }
1418 }
1419 Log.d(Config.LOGTAG, commands.toString());
1420 synchronized (this.commands) {
1421 this.commands.clear();
1422 this.commands.putAll(commands);
1423 }
1424 }
1425 });
1426 }
1427
1428 public boolean isMamPreferenceAlways() {
1429 return isMamPreferenceAlways;
1430 }
1431
1432 private void finalizeBind() {
1433 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1434 if (bindListener != null) {
1435 bindListener.onBind(account);
1436 }
1437 changeStatus(Account.State.ONLINE);
1438 }
1439
1440 private void enableAdvancedStreamFeatures() {
1441 if (getFeatures().blocking() && !features.blockListRequested) {
1442 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1443 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1444 }
1445 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1446 listener.onAdvancedStreamFeaturesAvailable(account);
1447 }
1448 if (getFeatures().carbons() && !features.carbonsEnabled) {
1449 sendEnableCarbons();
1450 }
1451 if (getFeatures().commands()) {
1452 discoverCommands();
1453 }
1454 }
1455
1456 private void sendServiceDiscoveryItems(final Jid server) {
1457 mPendingServiceDiscoveries.incrementAndGet();
1458 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1459 iq.setTo(server.getDomain());
1460 iq.query("http://jabber.org/protocol/disco#items");
1461 this.sendIqPacket(iq, (account, packet) -> {
1462 if (packet.getType() == IqPacket.TYPE.RESULT) {
1463 final HashSet<Jid> items = new HashSet<>();
1464 final List<Element> elements = packet.query().getChildren();
1465 for (final Element element : elements) {
1466 if (element.getName().equals("item")) {
1467 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1468 if (jid != null && !jid.equals(account.getDomain())) {
1469 items.add(jid);
1470 }
1471 }
1472 }
1473 for (Jid jid : items) {
1474 sendServiceDiscoveryInfo(jid);
1475 }
1476 } else {
1477 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1478 }
1479 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1480 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1481 && mWaitForDisco.compareAndSet(true, false)) {
1482 finalizeBind();
1483 }
1484 }
1485 });
1486 }
1487
1488 private void sendEnableCarbons() {
1489 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1490 iq.addChild("enable", "urn:xmpp:carbons:2");
1491 this.sendIqPacket(iq, (account, packet) -> {
1492 if (!packet.hasChild("error")) {
1493 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1494 + ": successfully enabled carbons");
1495 features.carbonsEnabled = true;
1496 } else {
1497 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1498 + ": could not enable carbons " + packet);
1499 }
1500 });
1501 }
1502
1503 private void processStreamError(final Tag currentTag) throws IOException {
1504 final Element streamError = tagReader.readElement(currentTag);
1505 if (streamError == null) {
1506 return;
1507 }
1508 if (streamError.hasChild("conflict")) {
1509 account.setResource(createNewResource());
1510 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1511 throw new IOException();
1512 } else if (streamError.hasChild("host-unknown")) {
1513 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1514 } else if (streamError.hasChild("policy-violation")) {
1515 this.lastConnect = SystemClock.elapsedRealtime();
1516 final String text = streamError.findChildContent("text");
1517 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1518 failPendingMessages(text);
1519 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1520 } else {
1521 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
1522 throw new StateChangingException(Account.State.STREAM_ERROR);
1523 }
1524 }
1525
1526 private void failPendingMessages(final String error) {
1527 synchronized (this.mStanzaQueue) {
1528 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1529 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1530 if (stanza instanceof MessagePacket) {
1531 final MessagePacket packet = (MessagePacket) stanza;
1532 final String id = packet.getId();
1533 final Jid to = packet.getTo();
1534 mXmppConnectionService.markMessage(account,
1535 to.asBareJid(),
1536 id,
1537 Message.STATUS_SEND_FAILED,
1538 error);
1539 }
1540 }
1541 }
1542 }
1543
1544 private void sendStartStream() throws IOException {
1545 final Tag stream = Tag.start("stream:stream");
1546 stream.setAttribute("to", account.getServer());
1547 stream.setAttribute("version", "1.0");
1548 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1549 stream.setAttribute("xmlns", "jabber:client");
1550 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1551 tagWriter.writeTag(stream);
1552 }
1553
1554 private String createNewResource() {
1555 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1556 }
1557
1558 private String nextRandomId() {
1559 return nextRandomId(false);
1560 }
1561
1562 private String nextRandomId(boolean s) {
1563 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1564 }
1565
1566 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1567 packet.setFrom(account.getJid());
1568 return this.sendUnmodifiedIqPacket(packet, callback, false);
1569 }
1570
1571 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1572 if (packet.getId() == null) {
1573 packet.setAttribute("id", nextRandomId());
1574 }
1575 if (callback != null) {
1576 synchronized (this.packetCallbacks) {
1577 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1578 }
1579 }
1580 this.sendPacket(packet, force);
1581 return packet.getId();
1582 }
1583
1584 public void sendMessagePacket(final MessagePacket packet) {
1585 this.sendPacket(packet);
1586 }
1587
1588 public void sendPresencePacket(final PresencePacket packet) {
1589 this.sendPacket(packet);
1590 }
1591
1592 private synchronized void sendPacket(final AbstractStanza packet) {
1593 sendPacket(packet, false);
1594 }
1595
1596 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1597 if (stanzasSent == Integer.MAX_VALUE) {
1598 resetStreamId();
1599 disconnect(true);
1600 return;
1601 }
1602 synchronized (this.mStanzaQueue) {
1603 if (force || isBound) {
1604 tagWriter.writeStanzaAsync(packet);
1605 } else {
1606 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1607 }
1608 if (packet instanceof AbstractAcknowledgeableStanza) {
1609 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1610
1611 if (this.mStanzaQueue.size() != 0) {
1612 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1613 if (currentHighestKey != stanzasSent) {
1614 throw new AssertionError("Stanza count messed up");
1615 }
1616 }
1617
1618 ++stanzasSent;
1619 this.mStanzaQueue.append(stanzasSent, stanza);
1620 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1621 if (Config.EXTENDED_SM_LOGGING) {
1622 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1623 }
1624 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1625 }
1626 }
1627 }
1628 }
1629
1630 public void sendPing() {
1631 if (!r()) {
1632 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1633 iq.setFrom(account.getJid());
1634 iq.addChild("ping", Namespace.PING);
1635 this.sendIqPacket(iq, null);
1636 }
1637 this.lastPingSent = SystemClock.elapsedRealtime();
1638 }
1639
1640 public void setOnMessagePacketReceivedListener(
1641 final OnMessagePacketReceived listener) {
1642 this.messageListener = listener;
1643 }
1644
1645 public void setOnUnregisteredIqPacketReceivedListener(
1646 final OnIqPacketReceived listener) {
1647 this.unregisteredIqListener = listener;
1648 }
1649
1650 public void setOnPresencePacketReceivedListener(
1651 final OnPresencePacketReceived listener) {
1652 this.presenceListener = listener;
1653 }
1654
1655 public void setOnJinglePacketReceivedListener(
1656 final OnJinglePacketReceived listener) {
1657 this.jingleListener = listener;
1658 }
1659
1660 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1661 this.statusListener = listener;
1662 }
1663
1664 public void setOnBindListener(final OnBindListener listener) {
1665 this.bindListener = listener;
1666 }
1667
1668 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1669 this.acknowledgedListener = listener;
1670 }
1671
1672 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1673 this.advancedStreamFeaturesLoadedListeners.add(listener);
1674 }
1675
1676 private void forceCloseSocket() {
1677 FileBackend.close(this.socket);
1678 FileBackend.close(this.tagReader);
1679 }
1680
1681 public void interrupt() {
1682 if (this.mThread != null) {
1683 this.mThread.interrupt();
1684 }
1685 }
1686
1687 public void disconnect(final boolean force) {
1688 interrupt();
1689 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
1690 if (force) {
1691 forceCloseSocket();
1692 } else {
1693 final TagWriter currentTagWriter = this.tagWriter;
1694 if (currentTagWriter.isActive()) {
1695 currentTagWriter.finish();
1696 final Socket currentSocket = this.socket;
1697 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1698 try {
1699 currentTagWriter.await(1, TimeUnit.SECONDS);
1700 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1701 currentTagWriter.writeTag(Tag.end("stream:stream"));
1702 if (streamCountDownLatch != null) {
1703 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1704 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1705 } else {
1706 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1707 }
1708 }
1709 } catch (InterruptedException e) {
1710 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1711 } catch (final IOException e) {
1712 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1713 } finally {
1714 FileBackend.close(currentSocket);
1715 }
1716 } else {
1717 forceCloseSocket();
1718 }
1719 }
1720 }
1721
1722 private void resetStreamId() {
1723 this.streamId = null;
1724 }
1725
1726 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1727 synchronized (this.disco) {
1728 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1729 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1730 if (cursor.getValue().getFeatures().contains(feature)) {
1731 items.add(cursor);
1732 }
1733 }
1734 return items;
1735 }
1736 }
1737
1738 public Jid findDiscoItemByFeature(final String feature) {
1739 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1740 if (items.size() >= 1) {
1741 return items.get(0).getKey();
1742 }
1743 return null;
1744 }
1745
1746 public boolean r() {
1747 if (getFeatures().sm()) {
1748 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1749 return true;
1750 } else {
1751 return false;
1752 }
1753 }
1754
1755 public List<String> getMucServersWithholdAccount() {
1756 final List<String> servers = getMucServers();
1757 servers.remove(account.getDomain().toEscapedString());
1758 return servers;
1759 }
1760
1761 public List<String> getMucServers() {
1762 List<String> servers = new ArrayList<>();
1763 synchronized (this.disco) {
1764 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1765 final ServiceDiscoveryResult value = cursor.getValue();
1766 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1767 && value.hasIdentity("conference", "text")
1768 && !value.getFeatures().contains("jabber:iq:gateway")
1769 && !value.hasIdentity("conference", "irc")) {
1770 servers.add(cursor.getKey().toString());
1771 }
1772 }
1773 }
1774 return servers;
1775 }
1776
1777 public String getMucServer() {
1778 List<String> servers = getMucServers();
1779 return servers.size() > 0 ? servers.get(0) : null;
1780 }
1781
1782 public int getTimeToNextAttempt() {
1783 final int additionalTime = account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
1784 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
1785 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1786 return interval - secondsSinceLast;
1787 }
1788
1789 public int getAttempt() {
1790 return this.attempt;
1791 }
1792
1793 public Features getFeatures() {
1794 return this.features;
1795 }
1796
1797 public long getLastSessionEstablished() {
1798 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1799 return System.currentTimeMillis() - diff;
1800 }
1801
1802 public long getLastConnect() {
1803 return this.lastConnect;
1804 }
1805
1806 public long getLastPingSent() {
1807 return this.lastPingSent;
1808 }
1809
1810 public long getLastDiscoStarted() {
1811 return this.lastDiscoStarted;
1812 }
1813
1814 public long getLastPacketReceived() {
1815 return this.lastPacketReceived;
1816 }
1817
1818 public void sendActive() {
1819 this.sendPacket(new ActivePacket());
1820 }
1821
1822 public void sendInactive() {
1823 this.sendPacket(new InactivePacket());
1824 }
1825
1826 public void resetAttemptCount(boolean resetConnectTime) {
1827 this.attempt = 0;
1828 if (resetConnectTime) {
1829 this.lastConnect = 0;
1830 }
1831 }
1832
1833 public void setInteractive(boolean interactive) {
1834 this.mInteractive = interactive;
1835 }
1836
1837 public Identity getServerIdentity() {
1838 synchronized (this.disco) {
1839 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
1840 if (result == null) {
1841 return Identity.UNKNOWN;
1842 }
1843 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1844 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1845 switch (id.getName()) {
1846 case "Prosody":
1847 return Identity.PROSODY;
1848 case "ejabberd":
1849 return Identity.EJABBERD;
1850 case "Slack-XMPP":
1851 return Identity.SLACK;
1852 }
1853 }
1854 }
1855 }
1856 return Identity.UNKNOWN;
1857 }
1858
1859 private IqGenerator getIqGenerator() {
1860 return mXmppConnectionService.getIqGenerator();
1861 }
1862
1863 public enum Identity {
1864 FACEBOOK,
1865 SLACK,
1866 EJABBERD,
1867 PROSODY,
1868 NIMBUZZ,
1869 UNKNOWN
1870 }
1871
1872 private class MyKeyManager implements X509KeyManager {
1873 @Override
1874 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1875 return account.getPrivateKeyAlias();
1876 }
1877
1878 @Override
1879 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1880 return null;
1881 }
1882
1883 @Override
1884 public X509Certificate[] getCertificateChain(String alias) {
1885 Log.d(Config.LOGTAG, "getting certificate chain");
1886 try {
1887 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1888 } catch (final Exception e) {
1889 Log.d(Config.LOGTAG, "could not get certificate chain", e);
1890 return new X509Certificate[0];
1891 }
1892 }
1893
1894 @Override
1895 public String[] getClientAliases(String s, Principal[] principals) {
1896 final String alias = account.getPrivateKeyAlias();
1897 return alias != null ? new String[]{alias} : new String[0];
1898 }
1899
1900 @Override
1901 public String[] getServerAliases(String s, Principal[] principals) {
1902 return new String[0];
1903 }
1904
1905 @Override
1906 public PrivateKey getPrivateKey(String alias) {
1907 try {
1908 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1909 } catch (Exception e) {
1910 return null;
1911 }
1912 }
1913 }
1914
1915 private static class StateChangingError extends Error {
1916 private final Account.State state;
1917
1918 public StateChangingError(Account.State state) {
1919 this.state = state;
1920 }
1921 }
1922
1923 private static class StateChangingException extends IOException {
1924 private final Account.State state;
1925
1926 public StateChangingException(Account.State state) {
1927 this.state = state;
1928 }
1929 }
1930
1931 public class Features {
1932 XmppConnection connection;
1933 private boolean carbonsEnabled = false;
1934 private boolean encryptionEnabled = false;
1935 private boolean blockListRequested = false;
1936
1937 public Features(final XmppConnection connection) {
1938 this.connection = connection;
1939 }
1940
1941 private boolean hasDiscoFeature(final Jid server, final String feature) {
1942 synchronized (XmppConnection.this.disco) {
1943 return connection.disco.containsKey(server) &&
1944 connection.disco.get(server).getFeatures().contains(feature);
1945 }
1946 }
1947
1948 public boolean carbons() {
1949 return hasDiscoFeature(account.getDomain(), "urn:xmpp:carbons:2");
1950 }
1951
1952 public boolean commands() {
1953 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
1954 }
1955
1956 public boolean easyOnboardingInvites() {
1957 synchronized (commands) {
1958 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
1959 }
1960 }
1961
1962 public boolean bookmarksConversion() {
1963 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1964 }
1965
1966 public boolean avatarConversion() {
1967 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION) && pepPublishOptions();
1968 }
1969
1970 public boolean blocking() {
1971 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
1972 }
1973
1974 public boolean spamReporting() {
1975 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
1976 }
1977
1978 public boolean flexibleOfflineMessageRetrieval() {
1979 return hasDiscoFeature(account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
1980 }
1981
1982 public boolean register() {
1983 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
1984 }
1985
1986 public boolean invite() {
1987 return connection.streamFeatures != null && connection.streamFeatures.hasChild("register", Namespace.INVITE);
1988 }
1989
1990 public boolean sm() {
1991 return streamId != null
1992 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1993 }
1994
1995 public boolean csi() {
1996 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1997 }
1998
1999 public boolean pep() {
2000 synchronized (XmppConnection.this.disco) {
2001 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2002 return info != null && info.hasIdentity("pubsub", "pep");
2003 }
2004 }
2005
2006 public boolean pepPersistent() {
2007 synchronized (XmppConnection.this.disco) {
2008 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2009 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
2010 }
2011 }
2012
2013 public boolean pepPublishOptions() {
2014 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2015 }
2016
2017 public boolean pepOmemoWhitelisted() {
2018 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2019 }
2020
2021 public boolean mam() {
2022 return MessageArchiveService.Version.has(getAccountFeatures());
2023 }
2024
2025 public List<String> getAccountFeatures() {
2026 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2027 return result == null ? Collections.emptyList() : result.getFeatures();
2028 }
2029
2030 public boolean push() {
2031 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2032 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2033 }
2034
2035 public boolean rosterVersioning() {
2036 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2037 }
2038
2039 public void setBlockListRequested(boolean value) {
2040 this.blockListRequested = value;
2041 }
2042
2043 public boolean httpUpload(long filesize) {
2044 if (Config.DISABLE_HTTP_UPLOAD) {
2045 return false;
2046 } else {
2047 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2048 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2049 if (items.size() > 0) {
2050 try {
2051 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2052 if (filesize <= maxsize) {
2053 return true;
2054 } else {
2055 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
2056 return false;
2057 }
2058 } catch (Exception e) {
2059 return true;
2060 }
2061 }
2062 }
2063 return false;
2064 }
2065 }
2066
2067 public boolean useLegacyHttpUpload() {
2068 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2069 }
2070
2071 public long getMaxHttpUploadSize() {
2072 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2073 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2074 if (items.size() > 0) {
2075 try {
2076 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2077 } catch (Exception e) {
2078 //ignored
2079 }
2080 }
2081 }
2082 return -1;
2083 }
2084
2085 public boolean stanzaIds() {
2086 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2087 }
2088
2089 public boolean bookmarks2() {
2090 return Config.USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
2091 }
2092
2093 public boolean externalServiceDiscovery() {
2094 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2095 }
2096 }
2097}