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 final Element resumed = success.findChild("resumed", "urn:xmpp:sm:3");
510 if (resumed != null && streamId != null) {
511 processResumed(resumed);
512 }
513 }
514 if (version == SaslMechanism.Version.SASL) {
515 tagReader.reset();
516 sendStartStream();
517 final Tag tag = tagReader.readTag();
518 if (tag != null && tag.isStart("stream")) {
519 processStream();
520 } else {
521 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
522 }
523 break;
524 }
525 } else if (nextTag.isStart("failure", Namespace.TLS)) {
526 throw new StateChangingException(Account.State.TLS_ERROR);
527 } else if (nextTag.isStart("failure")) {
528 final Element failure = tagReader.readElement(nextTag);
529 final SaslMechanism.Version version;
530 try {
531 version = SaslMechanism.Version.of(failure);
532 } catch (final IllegalArgumentException e) {
533 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
534 }
535 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": login failure " + version);
536 if (failure.hasChild("temporary-auth-failure")) {
537 throw new StateChangingException(Account.State.TEMPORARY_AUTH_FAILURE);
538 } else if (failure.hasChild("account-disabled")) {
539 final String text = failure.findChildContent("text");
540 if (Strings.isNullOrEmpty(text)) {
541 throw new StateChangingException(Account.State.UNAUTHORIZED);
542 }
543 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
544 if (matcher.find()) {
545 final HttpUrl url;
546 try {
547 url = HttpUrl.get(text.substring(matcher.start(), matcher.end()));
548 } catch (final IllegalArgumentException e) {
549 throw new StateChangingException(Account.State.UNAUTHORIZED);
550 }
551 if (url.isHttps()) {
552 this.redirectionUrl = url;
553 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
554 }
555 }
556 }
557 throw new StateChangingException(Account.State.UNAUTHORIZED);
558 } else if (nextTag.isStart("continue", Namespace.SASL_2)) {
559 throw new StateChangingException(Account.State.INCOMPATIBLE_CLIENT);
560 } else if (nextTag.isStart("challenge")) {
561 final Element challenge = tagReader.readElement(nextTag);
562 final SaslMechanism.Version version;
563 try {
564 version = SaslMechanism.Version.of(challenge);
565 } catch (final IllegalArgumentException e) {
566 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
567 }
568 final Element response;
569 if (version == SaslMechanism.Version.SASL) {
570 response = new Element("response", Namespace.SASL);
571 } else if (version == SaslMechanism.Version.SASL_2) {
572 response = new Element("response", Namespace.SASL_2);
573 } else {
574 throw new AssertionError("Missing implementation for " + version);
575 }
576 try {
577 response.setContent(saslMechanism.getResponse(challenge.getContent()));
578 } catch (final SaslMechanism.AuthenticationException e) {
579 // TODO: Send auth abort tag.
580 Log.e(Config.LOGTAG, e.toString());
581 throw new StateChangingException(Account.State.UNAUTHORIZED);
582 }
583 tagWriter.writeElement(response);
584 } else if (nextTag.isStart("enabled")) {
585 final Element enabled = tagReader.readElement(nextTag);
586 if (enabled.getAttributeAsBoolean("resume")) {
587 this.streamId = enabled.getAttribute("id");
588 Log.d(
589 Config.LOGTAG,
590 account.getJid().asBareJid().toString()
591 + ": stream management("
592 + smVersion
593 + ") enabled (resumable)");
594 } else {
595 Log.d(
596 Config.LOGTAG,
597 account.getJid().asBareJid().toString()
598 + ": stream management("
599 + smVersion
600 + ") enabled");
601 }
602 this.stanzasReceived = 0;
603 this.inSmacksSession = true;
604 final RequestPacket r = new RequestPacket(smVersion);
605 tagWriter.writeStanzaAsync(r);
606 } else if (nextTag.isStart("resumed")) {
607 final Element resumed = tagReader.readElement(nextTag);
608 processResumed(resumed);
609 } else if (nextTag.isStart("r")) {
610 tagReader.readElement(nextTag);
611 if (Config.EXTENDED_SM_LOGGING) {
612 Log.d(
613 Config.LOGTAG,
614 account.getJid().asBareJid()
615 + ": acknowledging stanza #"
616 + this.stanzasReceived);
617 }
618 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
619 tagWriter.writeStanzaAsync(ack);
620 } else if (nextTag.isStart("a")) {
621 boolean accountUiNeedsRefresh = false;
622 synchronized (NotificationService.CATCHUP_LOCK) {
623 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
624 final int messageCount = mSmCatchupMessageCounter.get();
625 final int pendingIQs = packetCallbacks.size();
626 Log.d(
627 Config.LOGTAG,
628 account.getJid().asBareJid()
629 + ": SM catchup complete (messages="
630 + messageCount
631 + ", pending IQs="
632 + pendingIQs
633 + ")");
634 accountUiNeedsRefresh = true;
635 if (messageCount > 0) {
636 mXmppConnectionService
637 .getNotificationService()
638 .finishBacklog(true, account);
639 }
640 }
641 }
642 if (accountUiNeedsRefresh) {
643 mXmppConnectionService.updateAccountUi();
644 }
645 final Element ack = tagReader.readElement(nextTag);
646 lastPacketReceived = SystemClock.elapsedRealtime();
647 try {
648 final boolean acknowledgedMessages;
649 synchronized (this.mStanzaQueue) {
650 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
651 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
652 }
653 if (acknowledgedMessages) {
654 mXmppConnectionService.updateConversationUi();
655 }
656 } catch (NumberFormatException | NullPointerException e) {
657 Log.d(
658 Config.LOGTAG,
659 account.getJid().asBareJid()
660 + ": server send ack without sequence number");
661 }
662 } else if (nextTag.isStart("failed")) {
663 Element failed = tagReader.readElement(nextTag);
664 try {
665 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
666 Log.d(
667 Config.LOGTAG,
668 account.getJid().asBareJid()
669 + ": resumption failed but server acknowledged stanza #"
670 + serverCount);
671 final boolean acknowledgedMessages;
672 synchronized (this.mStanzaQueue) {
673 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
674 }
675 if (acknowledgedMessages) {
676 mXmppConnectionService.updateConversationUi();
677 }
678 } catch (NumberFormatException | NullPointerException e) {
679 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
680 }
681 resetStreamId();
682 sendBindRequest();
683 } else if (nextTag.isStart("iq")) {
684 processIq(nextTag);
685 } else if (nextTag.isStart("message")) {
686 processMessage(nextTag);
687 } else if (nextTag.isStart("presence")) {
688 processPresence(nextTag);
689 }
690 nextTag = tagReader.readTag();
691 }
692 if (nextTag != null && nextTag.isEnd("stream")) {
693 streamCountDownLatch.countDown();
694 }
695 }
696
697 private void processResumed(final Element resumed) {
698 this.inSmacksSession = true;
699 this.isBound = true;
700 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
701 lastPacketReceived = SystemClock.elapsedRealtime();
702 final String h = resumed.getAttribute("h");
703 try {
704 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
705 final boolean acknowledgedMessages;
706 synchronized (this.mStanzaQueue) {
707 final int serverCount = Integer.parseInt(h);
708 if (serverCount < stanzasSent) {
709 Log.d(
710 Config.LOGTAG,
711 account.getJid().asBareJid() + ": session resumed with lost packages");
712 stanzasSent = serverCount;
713 } else {
714 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": session resumed");
715 }
716 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
717 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
718 failedStanzas.add(mStanzaQueue.valueAt(i));
719 }
720 mStanzaQueue.clear();
721 }
722 if (acknowledgedMessages) {
723 mXmppConnectionService.updateConversationUi();
724 }
725 Log.d(
726 Config.LOGTAG,
727 account.getJid().asBareJid()
728 + ": resending "
729 + failedStanzas.size()
730 + " stanzas");
731 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
732 if (packet instanceof MessagePacket) {
733 MessagePacket message = (MessagePacket) packet;
734 mXmppConnectionService.markMessage(
735 account,
736 message.getTo().asBareJid(),
737 message.getId(),
738 Message.STATUS_UNSEND);
739 }
740 sendPacket(packet);
741 }
742 } catch (final NumberFormatException ignored) {
743 }
744 Log.d(
745 Config.LOGTAG,
746 account.getJid().asBareJid() + ": online with resource " + account.getResource());
747 changeStatus(Account.State.ONLINE);
748 }
749
750 private boolean acknowledgeStanzaUpTo(int serverCount) {
751 if (serverCount > stanzasSent) {
752 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
753 }
754 boolean acknowledgedMessages = false;
755 for (int i = 0; i < mStanzaQueue.size(); ++i) {
756 if (serverCount >= mStanzaQueue.keyAt(i)) {
757 if (Config.EXTENDED_SM_LOGGING) {
758 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
759 }
760 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
761 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
762 final MessagePacket packet = (MessagePacket) stanza;
763 final String id = packet.getId();
764 final Jid to = packet.getTo();
765 if (id != null && to != null) {
766 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, to, id);
767 }
768 }
769 mStanzaQueue.removeAt(i);
770 i--;
771 }
772 }
773 return acknowledgedMessages;
774 }
775
776 private @NonNull
777 Element processPacket(final Tag currentTag, final int packetType) throws IOException {
778 final Element element;
779 switch (packetType) {
780 case PACKET_IQ:
781 element = new IqPacket();
782 break;
783 case PACKET_MESSAGE:
784 element = new MessagePacket();
785 break;
786 case PACKET_PRESENCE:
787 element = new PresencePacket();
788 break;
789 default:
790 throw new AssertionError("Should never encounter invalid type");
791 }
792 element.setAttributes(currentTag.getAttributes());
793 Tag nextTag = tagReader.readTag();
794 if (nextTag == null) {
795 throw new IOException("interrupted mid tag");
796 }
797 while (!nextTag.isEnd(element.getName())) {
798 if (!nextTag.isNo()) {
799 element.addChild(tagReader.readElement(nextTag));
800 }
801 nextTag = tagReader.readTag();
802 if (nextTag == null) {
803 throw new IOException("interrupted mid tag");
804 }
805 }
806 if (stanzasReceived == Integer.MAX_VALUE) {
807 resetStreamId();
808 throw new IOException("time to restart the session. cant handle >2 billion pcks");
809 }
810 if (inSmacksSession) {
811 ++stanzasReceived;
812 } else if (features.sm()) {
813 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
814 }
815 lastPacketReceived = SystemClock.elapsedRealtime();
816 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
817 Log.d(Config.LOGTAG, "[background stanza] " + element);
818 }
819 if (element instanceof IqPacket
820 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
821 && element.hasChild("jingle", Namespace.JINGLE)) {
822 return JinglePacket.upgrade((IqPacket) element);
823 } else {
824 return element;
825 }
826 }
827
828 private void processIq(final Tag currentTag) throws IOException {
829 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
830 if (!packet.valid()) {
831 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
832 return;
833 }
834 if (packet instanceof JinglePacket) {
835 if (this.jingleListener != null) {
836 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
837 }
838 } else {
839 OnIqPacketReceived callback = null;
840 synchronized (this.packetCallbacks) {
841 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
842 if (packetCallbackDuple != null) {
843 // Packets to the server should have responses from the server
844 if (packetCallbackDuple.first.toServer(account)) {
845 if (packet.fromServer(account)) {
846 callback = packetCallbackDuple.second;
847 packetCallbacks.remove(packet.getId());
848 } else {
849 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
850 }
851 } else {
852 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
853 callback = packetCallbackDuple.second;
854 packetCallbacks.remove(packet.getId());
855 } else {
856 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
857 }
858 }
859 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
860 callback = this.unregisteredIqListener;
861 }
862 }
863 if (callback != null) {
864 try {
865 callback.onIqPacketReceived(account, packet);
866 } catch (StateChangingError error) {
867 throw new StateChangingException(error.state);
868 }
869 }
870 }
871 }
872
873 private void processMessage(final Tag currentTag) throws IOException {
874 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
875 if (!packet.valid()) {
876 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
877 return;
878 }
879 this.messageListener.onMessagePacketReceived(account, packet);
880 }
881
882 private void processPresence(final Tag currentTag) throws IOException {
883 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
884 if (!packet.valid()) {
885 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
886 return;
887 }
888 this.presenceListener.onPresencePacketReceived(account, packet);
889 }
890
891 private void sendStartTLS() throws IOException {
892 final Tag startTLS = Tag.empty("starttls");
893 startTLS.setAttribute("xmlns", Namespace.TLS);
894 tagWriter.writeTag(startTLS);
895 }
896
897 private void switchOverToTls() throws XmlPullParserException, IOException {
898 tagReader.readTag();
899 final Socket socket = this.socket;
900 final SSLSocket sslSocket = upgradeSocketToTls(socket);
901 tagReader.setInputStream(sslSocket.getInputStream());
902 tagWriter.setOutputStream(sslSocket.getOutputStream());
903 sendStartStream();
904 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
905 features.encryptionEnabled = true;
906 final Tag tag = tagReader.readTag();
907 if (tag != null && tag.isStart("stream")) {
908 SSLSocketHelper.log(account, sslSocket);
909 processStream();
910 } else {
911 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
912 }
913 sslSocket.close();
914 }
915
916 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
917 final SSLSocketFactory sslSocketFactory;
918 try {
919 sslSocketFactory = getSSLSocketFactory();
920 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
921 throw new StateChangingException(Account.State.TLS_ERROR);
922 }
923 final InetAddress address = socket.getInetAddress();
924 final SSLSocket sslSocket = (SSLSocket) sslSocketFactory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
925 SSLSocketHelper.setSecurity(sslSocket);
926 SSLSocketHelper.setHostname(sslSocket, IDN.toASCII(account.getServer()));
927 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
928 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
929 try {
930 if (!xmppDomainVerifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
931 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate domain verification failed");
932 FileBackend.close(sslSocket);
933 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
934 }
935 } catch (final SSLPeerUnverifiedException e) {
936 FileBackend.close(sslSocket);
937 throw new StateChangingException(Account.State.TLS_ERROR);
938 }
939 return sslSocket;
940 }
941
942 private void processStreamFeatures(final Tag currentTag) throws IOException {
943 this.streamFeatures = tagReader.readElement(currentTag);
944 final boolean isSecure =
945 features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
946 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
947 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
948 && !features.encryptionEnabled) {
949 sendStartTLS();
950 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
951 && account.isOptionSet(Account.OPTION_REGISTER)) {
952 if (isSecure) {
953 register();
954 } else {
955 Log.d(
956 Config.LOGTAG,
957 account.getJid().asBareJid()
958 + ": unable to find STARTTLS for registration process "
959 + XmlHelper.printElementNames(this.streamFeatures));
960 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
961 }
962 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
963 && account.isOptionSet(Account.OPTION_REGISTER)) {
964 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
965 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL_2)
966 && shouldAuthenticate
967 && isSecure) {
968 authenticate(SaslMechanism.Version.SASL_2);
969 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
970 && shouldAuthenticate
971 && isSecure) {
972 authenticate(SaslMechanism.Version.SASL);
973 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion)
974 && streamId != null) {
975 if (Config.EXTENDED_SM_LOGGING) {
976 Log.d(
977 Config.LOGTAG,
978 account.getJid().asBareJid()
979 + ": resuming after stanza #"
980 + stanzasReceived);
981 }
982 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
983 this.mSmCatchupMessageCounter.set(0);
984 this.mWaitingForSmCatchup.set(true);
985 this.tagWriter.writeStanzaAsync(resume);
986 } else if (needsBinding) {
987 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
988 sendBindRequest();
989 } else {
990 Log.d(
991 Config.LOGTAG,
992 account.getJid().asBareJid()
993 + ": unable to find bind feature "
994 + XmlHelper.printElementNames(this.streamFeatures));
995 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
996 }
997 } else {
998 Log.d(
999 Config.LOGTAG,
1000 account.getJid().asBareJid()
1001 + ": received NOP stream features"
1002 + this.streamFeatures);
1003 }
1004 }
1005
1006 private void authenticate(final SaslMechanism.Version version) throws IOException {
1007 final List<String> mechanisms = extractMechanisms(streamFeatures.findChild("mechanisms"));
1008 if (mechanisms.contains(External.MECHANISM) && account.getPrivateKeyAlias() != null) {
1009 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
1010 } else if (mechanisms.contains(ScramSha512.MECHANISM)) {
1011 saslMechanism = new ScramSha512(tagWriter, account, mXmppConnectionService.getRNG());
1012 } else if (mechanisms.contains(ScramSha256.MECHANISM)) {
1013 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
1014 } else if (mechanisms.contains(ScramSha1.MECHANISM)) {
1015 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
1016 } else if (mechanisms.contains(Plain.MECHANISM) && !account.getJid().getDomain().toEscapedString().equals("nimbuzz.com")) {
1017 saslMechanism = new Plain(tagWriter, account);
1018 } else if (mechanisms.contains(DigestMd5.MECHANISM)) {
1019 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
1020 } else if (mechanisms.contains(Anonymous.MECHANISM)) {
1021 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
1022 }
1023 if (saslMechanism == null) {
1024 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find supported SASL mechanism in " + mechanisms);
1025 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1026 }
1027 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
1028 if (pinnedMechanism > saslMechanism.getPriority()) {
1029 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
1030 " has lower priority (" + saslMechanism.getPriority() +
1031 ") than pinned priority (" + pinnedMechanism +
1032 "). Possible downgrade attack?");
1033 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1034 }
1035 final String firstMessage = saslMechanism.getClientFirstMessage();
1036 final Element authenticate;
1037 if (version == SaslMechanism.Version.SASL) {
1038 authenticate = new Element("auth", Namespace.SASL);
1039 if (!Strings.isNullOrEmpty(firstMessage)) {
1040 authenticate.setContent(firstMessage);
1041 }
1042 } else if (version == SaslMechanism.Version.SASL_2) {
1043 authenticate = new Element("authenticate", Namespace.SASL_2);
1044 if (!Strings.isNullOrEmpty(firstMessage)) {
1045 authenticate.addChild("initial-response").setContent(firstMessage);
1046 }
1047 final Element inline = this.streamFeatures.findChild("inline", Namespace.SASL_2);
1048 final boolean inlineStreamManagement = inline != null && inline.hasChild("sm", "urn:xmpp:sm:3");
1049 if (inlineStreamManagement && streamId != null) {
1050 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
1051 this.mSmCatchupMessageCounter.set(0);
1052 this.mWaitingForSmCatchup.set(true);
1053 authenticate.addChild(resume);
1054 }
1055 } else {
1056 throw new AssertionError("Missing implementation for " + version);
1057 }
1058
1059 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with "+version+ "/" + saslMechanism.getMechanism());
1060 authenticate.setAttribute("mechanism", saslMechanism.getMechanism());
1061 tagWriter.writeElement(authenticate);
1062 }
1063
1064 private List<String> extractMechanisms(final Element stream) {
1065 final ArrayList<String> mechanisms = new ArrayList<>(stream
1066 .getChildren().size());
1067 for (final Element child : stream.getChildren()) {
1068 mechanisms.add(child.getContent());
1069 }
1070 return mechanisms;
1071 }
1072
1073
1074 private void register() {
1075 final String preAuth = account.getKey(Account.PRE_AUTH_REGISTRATION_TOKEN);
1076 if (preAuth != null && features.invite()) {
1077 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1078 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1079 sendUnmodifiedIqPacket(preAuthRequest, (account, response) -> {
1080 if (response.getType() == IqPacket.TYPE.RESULT) {
1081 sendRegistryRequest();
1082 } else {
1083 final String error = response.getErrorCondition();
1084 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": failed to pre auth. " + error);
1085 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1086 }
1087 }, true);
1088 } else {
1089 sendRegistryRequest();
1090 }
1091 }
1092
1093 private void sendRegistryRequest() {
1094 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1095 register.query(Namespace.REGISTER);
1096 register.setTo(account.getDomain());
1097 sendUnmodifiedIqPacket(register, (account, packet) -> {
1098 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1099 return;
1100 }
1101 if (packet.getType() == IqPacket.TYPE.ERROR) {
1102 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1103 }
1104 final Element query = packet.query(Namespace.REGISTER);
1105 if (query.hasChild("username") && (query.hasChild("password"))) {
1106 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1107 final Element username = new Element("username").setContent(account.getUsername());
1108 final Element password = new Element("password").setContent(account.getPassword());
1109 register1.query(Namespace.REGISTER).addChild(username);
1110 register1.query().addChild(password);
1111 register1.setFrom(account.getJid().asBareJid());
1112 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1113 } else if (query.hasChild("x", Namespace.DATA)) {
1114 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1115 final Element blob = query.findChild("data", "urn:xmpp:bob");
1116 final String id = packet.getId();
1117 InputStream is;
1118 if (blob != null) {
1119 try {
1120 final String base64Blob = blob.getContent();
1121 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1122 is = new ByteArrayInputStream(strBlob);
1123 } catch (Exception e) {
1124 is = null;
1125 }
1126 } else {
1127 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
1128 try {
1129 final String url = data.getValue("url");
1130 final String fallbackUrl = data.getValue("captcha-fallback-url");
1131 if (url != null) {
1132 is = HttpConnectionManager.open(url, useTor);
1133 } else if (fallbackUrl != null) {
1134 is = HttpConnectionManager.open(fallbackUrl, useTor);
1135 } else {
1136 is = null;
1137 }
1138 } catch (final IOException e) {
1139 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to fetch captcha", e);
1140 is = null;
1141 }
1142 }
1143
1144 if (is != null) {
1145 Bitmap captcha = BitmapFactory.decodeStream(is);
1146 try {
1147 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
1148 return;
1149 }
1150 } catch (Exception e) {
1151 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1152 }
1153 }
1154 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1155 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
1156 final String instructions = query.findChildContent("instructions");
1157 final Element oob = query.findChild("x", Namespace.OOB);
1158 final String url = oob == null ? null : oob.findChildContent("url");
1159 if (url != null) {
1160 setAccountCreationFailed(url);
1161 } else if (instructions != null) {
1162 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1163 if (matcher.find()) {
1164 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
1165 }
1166 }
1167 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1168 }
1169 }, true);
1170 }
1171
1172 private void setAccountCreationFailed(final String url) {
1173 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1174 if (httpUrl != null && httpUrl.isHttps()) {
1175 this.redirectionUrl = httpUrl;
1176 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1177 }
1178 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1179 }
1180
1181 public HttpUrl getRedirectionUrl() {
1182 return this.redirectionUrl;
1183 }
1184
1185 public void resetEverything() {
1186 resetAttemptCount(true);
1187 resetStreamId();
1188 clearIqCallbacks();
1189 this.stanzasSent = 0;
1190 mStanzaQueue.clear();
1191 this.redirectionUrl = null;
1192 synchronized (this.disco) {
1193 disco.clear();
1194 }
1195 synchronized (this.commands) {
1196 this.commands.clear();
1197 }
1198 }
1199
1200 private void sendBindRequest() {
1201 try {
1202 mXmppConnectionService.restoredFromDatabaseLatch.await();
1203 } catch (InterruptedException e) {
1204 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1205 return;
1206 }
1207 clearIqCallbacks();
1208 if (account.getJid().isBareJid()) {
1209 account.setResource(this.createNewResource());
1210 } else {
1211 fixResource(mXmppConnectionService, account);
1212 }
1213 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1214 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1215 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1216 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1217 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1218 return;
1219 }
1220 final Element bind = packet.findChild("bind");
1221 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1222 isBound = true;
1223 final Element jid = bind.findChild("jid");
1224 if (jid != null && jid.getContent() != null) {
1225 try {
1226 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1227 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1228 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1229 throw new StateChangingError(Account.State.BIND_FAILURE);
1230 }
1231 if (account.setJid(assignedJid)) {
1232 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1233 mXmppConnectionService.databaseBackend.updateAccount(account);
1234 }
1235 if (streamFeatures.hasChild("session")
1236 && !streamFeatures.findChild("session").hasChild("optional")) {
1237 sendStartSession();
1238 } else {
1239 sendPostBindInitialization();
1240 }
1241 return;
1242 } catch (final IllegalArgumentException e) {
1243 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1244 }
1245 } else {
1246 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1247 }
1248 } else {
1249 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet);
1250 }
1251 final Element error = packet.findChild("error");
1252 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1253 account.setResource(createNewResource());
1254 }
1255 throw new StateChangingError(Account.State.BIND_FAILURE);
1256 }, true);
1257 }
1258
1259 private void clearIqCallbacks() {
1260 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1261 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1262 synchronized (this.packetCallbacks) {
1263 if (this.packetCallbacks.size() == 0) {
1264 return;
1265 }
1266 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1267 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1268 while (iterator.hasNext()) {
1269 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1270 callbacks.add(entry.second);
1271 iterator.remove();
1272 }
1273 }
1274 for (OnIqPacketReceived callback : callbacks) {
1275 try {
1276 callback.onIqPacketReceived(account, failurePacket);
1277 } catch (StateChangingError error) {
1278 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1279 //ignore
1280 }
1281 }
1282 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1283 }
1284
1285 public void sendDiscoTimeout() {
1286 if (mWaitForDisco.compareAndSet(true, false)) {
1287 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1288 finalizeBind();
1289 }
1290 }
1291
1292 private void sendStartSession() {
1293 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1294 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1295 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1296 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1297 if (packet.getType() == IqPacket.TYPE.RESULT) {
1298 sendPostBindInitialization();
1299 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1300 throw new StateChangingError(Account.State.SESSION_FAILURE);
1301 }
1302 }, true);
1303 }
1304
1305 private void sendPostBindInitialization() {
1306 smVersion = 0;
1307 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1308 smVersion = 3;
1309 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1310 smVersion = 2;
1311 }
1312 if (smVersion != 0) {
1313 synchronized (this.mStanzaQueue) {
1314 final EnablePacket enable = new EnablePacket(smVersion);
1315 tagWriter.writeStanzaAsync(enable);
1316 stanzasSent = 0;
1317 mStanzaQueue.clear();
1318 }
1319 }
1320 features.carbonsEnabled = false;
1321 features.blockListRequested = false;
1322 synchronized (this.disco) {
1323 this.disco.clear();
1324 }
1325 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1326 mPendingServiceDiscoveries.set(0);
1327 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain().toEscapedString())) {
1328 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1329 mWaitForDisco.set(false);
1330 } else {
1331 mWaitForDisco.set(true);
1332 }
1333 lastDiscoStarted = SystemClock.elapsedRealtime();
1334 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1335 Element caps = streamFeatures.findChild("c");
1336 final String hash = caps == null ? null : caps.getAttribute("hash");
1337 final String ver = caps == null ? null : caps.getAttribute("ver");
1338 ServiceDiscoveryResult discoveryResult = null;
1339 if (hash != null && ver != null) {
1340 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1341 }
1342 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1343 if (requestDiscoItemsFirst) {
1344 sendServiceDiscoveryItems(account.getDomain());
1345 }
1346 if (discoveryResult == null) {
1347 sendServiceDiscoveryInfo(account.getDomain());
1348 } else {
1349 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1350 disco.put(account.getDomain(), discoveryResult);
1351 }
1352 discoverMamPreferences();
1353 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1354 if (!requestDiscoItemsFirst) {
1355 sendServiceDiscoveryItems(account.getDomain());
1356 }
1357
1358 if (!mWaitForDisco.get()) {
1359 finalizeBind();
1360 }
1361 this.lastSessionStarted = SystemClock.elapsedRealtime();
1362 }
1363
1364 private void sendServiceDiscoveryInfo(final Jid jid) {
1365 mPendingServiceDiscoveries.incrementAndGet();
1366 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1367 iq.setTo(jid);
1368 iq.query("http://jabber.org/protocol/disco#info");
1369 this.sendIqPacket(iq, (account, packet) -> {
1370 if (packet.getType() == IqPacket.TYPE.RESULT) {
1371 boolean advancedStreamFeaturesLoaded;
1372 synchronized (XmppConnection.this.disco) {
1373 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1374 if (jid.equals(account.getDomain())) {
1375 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1376 }
1377 disco.put(jid, result);
1378 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain())
1379 && disco.containsKey(account.getJid().asBareJid());
1380 }
1381 if (advancedStreamFeaturesLoaded && (jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid()))) {
1382 enableAdvancedStreamFeatures();
1383 }
1384 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1385 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1386 final boolean serverOrAccount = jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid());
1387 final boolean advancedStreamFeaturesLoaded;
1388 if (serverOrAccount) {
1389 synchronized (XmppConnection.this.disco) {
1390 disco.put(jid, ServiceDiscoveryResult.empty());
1391 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain()) && disco.containsKey(account.getJid().asBareJid());
1392 }
1393 } else {
1394 advancedStreamFeaturesLoaded = false;
1395 }
1396 if (advancedStreamFeaturesLoaded) {
1397 enableAdvancedStreamFeatures();
1398 }
1399 }
1400 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1401 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1402 && mWaitForDisco.compareAndSet(true, false)) {
1403 finalizeBind();
1404 }
1405 }
1406 });
1407 }
1408
1409 private void discoverMamPreferences() {
1410 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1411 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1412 sendIqPacket(request, (account, response) -> {
1413 if (response.getType() == IqPacket.TYPE.RESULT) {
1414 Element prefs = response.findChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1415 isMamPreferenceAlways = "always".equals(prefs == null ? null : prefs.getAttribute("default"));
1416 }
1417 });
1418 }
1419
1420 private void discoverCommands() {
1421 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1422 request.setTo(account.getDomain());
1423 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1424 sendIqPacket(request, (account, response) -> {
1425 if (response.getType() == IqPacket.TYPE.RESULT) {
1426 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1427 if (query == null) {
1428 return;
1429 }
1430 final HashMap<String, Jid> commands = new HashMap<>();
1431 for (final Element child : query.getChildren()) {
1432 if ("item".equals(child.getName())) {
1433 final String node = child.getAttribute("node");
1434 final Jid jid = child.getAttributeAsJid("jid");
1435 if (node != null && jid != null) {
1436 commands.put(node, jid);
1437 }
1438 }
1439 }
1440 Log.d(Config.LOGTAG, commands.toString());
1441 synchronized (this.commands) {
1442 this.commands.clear();
1443 this.commands.putAll(commands);
1444 }
1445 }
1446 });
1447 }
1448
1449 public boolean isMamPreferenceAlways() {
1450 return isMamPreferenceAlways;
1451 }
1452
1453 private void finalizeBind() {
1454 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1455 if (bindListener != null) {
1456 bindListener.onBind(account);
1457 }
1458 changeStatus(Account.State.ONLINE);
1459 }
1460
1461 private void enableAdvancedStreamFeatures() {
1462 if (getFeatures().blocking() && !features.blockListRequested) {
1463 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1464 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1465 }
1466 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1467 listener.onAdvancedStreamFeaturesAvailable(account);
1468 }
1469 if (getFeatures().carbons() && !features.carbonsEnabled) {
1470 sendEnableCarbons();
1471 }
1472 if (getFeatures().commands()) {
1473 discoverCommands();
1474 }
1475 }
1476
1477 private void sendServiceDiscoveryItems(final Jid server) {
1478 mPendingServiceDiscoveries.incrementAndGet();
1479 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1480 iq.setTo(server.getDomain());
1481 iq.query("http://jabber.org/protocol/disco#items");
1482 this.sendIqPacket(iq, (account, packet) -> {
1483 if (packet.getType() == IqPacket.TYPE.RESULT) {
1484 final HashSet<Jid> items = new HashSet<>();
1485 final List<Element> elements = packet.query().getChildren();
1486 for (final Element element : elements) {
1487 if (element.getName().equals("item")) {
1488 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1489 if (jid != null && !jid.equals(account.getDomain())) {
1490 items.add(jid);
1491 }
1492 }
1493 }
1494 for (Jid jid : items) {
1495 sendServiceDiscoveryInfo(jid);
1496 }
1497 } else {
1498 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1499 }
1500 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1501 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1502 && mWaitForDisco.compareAndSet(true, false)) {
1503 finalizeBind();
1504 }
1505 }
1506 });
1507 }
1508
1509 private void sendEnableCarbons() {
1510 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1511 iq.addChild("enable", "urn:xmpp:carbons:2");
1512 this.sendIqPacket(iq, (account, packet) -> {
1513 if (!packet.hasChild("error")) {
1514 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1515 + ": successfully enabled carbons");
1516 features.carbonsEnabled = true;
1517 } else {
1518 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1519 + ": could not enable carbons " + packet);
1520 }
1521 });
1522 }
1523
1524 private void processStreamError(final Tag currentTag) throws IOException {
1525 final Element streamError = tagReader.readElement(currentTag);
1526 if (streamError == null) {
1527 return;
1528 }
1529 if (streamError.hasChild("conflict")) {
1530 account.setResource(createNewResource());
1531 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1532 throw new IOException();
1533 } else if (streamError.hasChild("host-unknown")) {
1534 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1535 } else if (streamError.hasChild("policy-violation")) {
1536 this.lastConnect = SystemClock.elapsedRealtime();
1537 final String text = streamError.findChildContent("text");
1538 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1539 failPendingMessages(text);
1540 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1541 } else {
1542 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
1543 throw new StateChangingException(Account.State.STREAM_ERROR);
1544 }
1545 }
1546
1547 private void failPendingMessages(final String error) {
1548 synchronized (this.mStanzaQueue) {
1549 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1550 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1551 if (stanza instanceof MessagePacket) {
1552 final MessagePacket packet = (MessagePacket) stanza;
1553 final String id = packet.getId();
1554 final Jid to = packet.getTo();
1555 mXmppConnectionService.markMessage(account,
1556 to.asBareJid(),
1557 id,
1558 Message.STATUS_SEND_FAILED,
1559 error);
1560 }
1561 }
1562 }
1563 }
1564
1565 private void sendStartStream() throws IOException {
1566 final Tag stream = Tag.start("stream:stream");
1567 stream.setAttribute("to", account.getServer());
1568 stream.setAttribute("version", "1.0");
1569 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1570 stream.setAttribute("xmlns", "jabber:client");
1571 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1572 tagWriter.writeTag(stream);
1573 }
1574
1575 private String createNewResource() {
1576 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1577 }
1578
1579 private String nextRandomId() {
1580 return nextRandomId(false);
1581 }
1582
1583 private String nextRandomId(boolean s) {
1584 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1585 }
1586
1587 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1588 packet.setFrom(account.getJid());
1589 return this.sendUnmodifiedIqPacket(packet, callback, false);
1590 }
1591
1592 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1593 if (packet.getId() == null) {
1594 packet.setAttribute("id", nextRandomId());
1595 }
1596 if (callback != null) {
1597 synchronized (this.packetCallbacks) {
1598 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1599 }
1600 }
1601 this.sendPacket(packet, force);
1602 return packet.getId();
1603 }
1604
1605 public void sendMessagePacket(final MessagePacket packet) {
1606 this.sendPacket(packet);
1607 }
1608
1609 public void sendPresencePacket(final PresencePacket packet) {
1610 this.sendPacket(packet);
1611 }
1612
1613 private synchronized void sendPacket(final AbstractStanza packet) {
1614 sendPacket(packet, false);
1615 }
1616
1617 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1618 if (stanzasSent == Integer.MAX_VALUE) {
1619 resetStreamId();
1620 disconnect(true);
1621 return;
1622 }
1623 synchronized (this.mStanzaQueue) {
1624 if (force || isBound) {
1625 tagWriter.writeStanzaAsync(packet);
1626 } else {
1627 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1628 }
1629 if (packet instanceof AbstractAcknowledgeableStanza) {
1630 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1631
1632 if (this.mStanzaQueue.size() != 0) {
1633 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1634 if (currentHighestKey != stanzasSent) {
1635 throw new AssertionError("Stanza count messed up");
1636 }
1637 }
1638
1639 ++stanzasSent;
1640 this.mStanzaQueue.append(stanzasSent, stanza);
1641 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1642 if (Config.EXTENDED_SM_LOGGING) {
1643 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1644 }
1645 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1646 }
1647 }
1648 }
1649 }
1650
1651 public void sendPing() {
1652 if (!r()) {
1653 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1654 iq.setFrom(account.getJid());
1655 iq.addChild("ping", Namespace.PING);
1656 this.sendIqPacket(iq, null);
1657 }
1658 this.lastPingSent = SystemClock.elapsedRealtime();
1659 }
1660
1661 public void setOnMessagePacketReceivedListener(
1662 final OnMessagePacketReceived listener) {
1663 this.messageListener = listener;
1664 }
1665
1666 public void setOnUnregisteredIqPacketReceivedListener(
1667 final OnIqPacketReceived listener) {
1668 this.unregisteredIqListener = listener;
1669 }
1670
1671 public void setOnPresencePacketReceivedListener(
1672 final OnPresencePacketReceived listener) {
1673 this.presenceListener = listener;
1674 }
1675
1676 public void setOnJinglePacketReceivedListener(
1677 final OnJinglePacketReceived listener) {
1678 this.jingleListener = listener;
1679 }
1680
1681 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1682 this.statusListener = listener;
1683 }
1684
1685 public void setOnBindListener(final OnBindListener listener) {
1686 this.bindListener = listener;
1687 }
1688
1689 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1690 this.acknowledgedListener = listener;
1691 }
1692
1693 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1694 this.advancedStreamFeaturesLoadedListeners.add(listener);
1695 }
1696
1697 private void forceCloseSocket() {
1698 FileBackend.close(this.socket);
1699 FileBackend.close(this.tagReader);
1700 }
1701
1702 public void interrupt() {
1703 if (this.mThread != null) {
1704 this.mThread.interrupt();
1705 }
1706 }
1707
1708 public void disconnect(final boolean force) {
1709 interrupt();
1710 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
1711 if (force) {
1712 forceCloseSocket();
1713 } else {
1714 final TagWriter currentTagWriter = this.tagWriter;
1715 if (currentTagWriter.isActive()) {
1716 currentTagWriter.finish();
1717 final Socket currentSocket = this.socket;
1718 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1719 try {
1720 currentTagWriter.await(1, TimeUnit.SECONDS);
1721 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1722 currentTagWriter.writeTag(Tag.end("stream:stream"));
1723 if (streamCountDownLatch != null) {
1724 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1725 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1726 } else {
1727 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1728 }
1729 }
1730 } catch (InterruptedException e) {
1731 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1732 } catch (final IOException e) {
1733 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1734 } finally {
1735 FileBackend.close(currentSocket);
1736 }
1737 } else {
1738 forceCloseSocket();
1739 }
1740 }
1741 }
1742
1743 private void resetStreamId() {
1744 this.streamId = null;
1745 }
1746
1747 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1748 synchronized (this.disco) {
1749 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1750 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1751 if (cursor.getValue().getFeatures().contains(feature)) {
1752 items.add(cursor);
1753 }
1754 }
1755 return items;
1756 }
1757 }
1758
1759 public Jid findDiscoItemByFeature(final String feature) {
1760 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1761 if (items.size() >= 1) {
1762 return items.get(0).getKey();
1763 }
1764 return null;
1765 }
1766
1767 public boolean r() {
1768 if (getFeatures().sm()) {
1769 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1770 return true;
1771 } else {
1772 return false;
1773 }
1774 }
1775
1776 public List<String> getMucServersWithholdAccount() {
1777 final List<String> servers = getMucServers();
1778 servers.remove(account.getDomain().toEscapedString());
1779 return servers;
1780 }
1781
1782 public List<String> getMucServers() {
1783 List<String> servers = new ArrayList<>();
1784 synchronized (this.disco) {
1785 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1786 final ServiceDiscoveryResult value = cursor.getValue();
1787 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1788 && value.hasIdentity("conference", "text")
1789 && !value.getFeatures().contains("jabber:iq:gateway")
1790 && !value.hasIdentity("conference", "irc")) {
1791 servers.add(cursor.getKey().toString());
1792 }
1793 }
1794 }
1795 return servers;
1796 }
1797
1798 public String getMucServer() {
1799 List<String> servers = getMucServers();
1800 return servers.size() > 0 ? servers.get(0) : null;
1801 }
1802
1803 public int getTimeToNextAttempt() {
1804 final int additionalTime = account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
1805 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
1806 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1807 return interval - secondsSinceLast;
1808 }
1809
1810 public int getAttempt() {
1811 return this.attempt;
1812 }
1813
1814 public Features getFeatures() {
1815 return this.features;
1816 }
1817
1818 public long getLastSessionEstablished() {
1819 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1820 return System.currentTimeMillis() - diff;
1821 }
1822
1823 public long getLastConnect() {
1824 return this.lastConnect;
1825 }
1826
1827 public long getLastPingSent() {
1828 return this.lastPingSent;
1829 }
1830
1831 public long getLastDiscoStarted() {
1832 return this.lastDiscoStarted;
1833 }
1834
1835 public long getLastPacketReceived() {
1836 return this.lastPacketReceived;
1837 }
1838
1839 public void sendActive() {
1840 this.sendPacket(new ActivePacket());
1841 }
1842
1843 public void sendInactive() {
1844 this.sendPacket(new InactivePacket());
1845 }
1846
1847 public void resetAttemptCount(boolean resetConnectTime) {
1848 this.attempt = 0;
1849 if (resetConnectTime) {
1850 this.lastConnect = 0;
1851 }
1852 }
1853
1854 public void setInteractive(boolean interactive) {
1855 this.mInteractive = interactive;
1856 }
1857
1858 public Identity getServerIdentity() {
1859 synchronized (this.disco) {
1860 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
1861 if (result == null) {
1862 return Identity.UNKNOWN;
1863 }
1864 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1865 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1866 switch (id.getName()) {
1867 case "Prosody":
1868 return Identity.PROSODY;
1869 case "ejabberd":
1870 return Identity.EJABBERD;
1871 case "Slack-XMPP":
1872 return Identity.SLACK;
1873 }
1874 }
1875 }
1876 }
1877 return Identity.UNKNOWN;
1878 }
1879
1880 private IqGenerator getIqGenerator() {
1881 return mXmppConnectionService.getIqGenerator();
1882 }
1883
1884 public enum Identity {
1885 FACEBOOK,
1886 SLACK,
1887 EJABBERD,
1888 PROSODY,
1889 NIMBUZZ,
1890 UNKNOWN
1891 }
1892
1893 private class MyKeyManager implements X509KeyManager {
1894 @Override
1895 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1896 return account.getPrivateKeyAlias();
1897 }
1898
1899 @Override
1900 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1901 return null;
1902 }
1903
1904 @Override
1905 public X509Certificate[] getCertificateChain(String alias) {
1906 Log.d(Config.LOGTAG, "getting certificate chain");
1907 try {
1908 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1909 } catch (final Exception e) {
1910 Log.d(Config.LOGTAG, "could not get certificate chain", e);
1911 return new X509Certificate[0];
1912 }
1913 }
1914
1915 @Override
1916 public String[] getClientAliases(String s, Principal[] principals) {
1917 final String alias = account.getPrivateKeyAlias();
1918 return alias != null ? new String[]{alias} : new String[0];
1919 }
1920
1921 @Override
1922 public String[] getServerAliases(String s, Principal[] principals) {
1923 return new String[0];
1924 }
1925
1926 @Override
1927 public PrivateKey getPrivateKey(String alias) {
1928 try {
1929 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1930 } catch (Exception e) {
1931 return null;
1932 }
1933 }
1934 }
1935
1936 private static class StateChangingError extends Error {
1937 private final Account.State state;
1938
1939 public StateChangingError(Account.State state) {
1940 this.state = state;
1941 }
1942 }
1943
1944 private static class StateChangingException extends IOException {
1945 private final Account.State state;
1946
1947 public StateChangingException(Account.State state) {
1948 this.state = state;
1949 }
1950 }
1951
1952 public class Features {
1953 XmppConnection connection;
1954 private boolean carbonsEnabled = false;
1955 private boolean encryptionEnabled = false;
1956 private boolean blockListRequested = false;
1957
1958 public Features(final XmppConnection connection) {
1959 this.connection = connection;
1960 }
1961
1962 private boolean hasDiscoFeature(final Jid server, final String feature) {
1963 synchronized (XmppConnection.this.disco) {
1964 return connection.disco.containsKey(server) &&
1965 connection.disco.get(server).getFeatures().contains(feature);
1966 }
1967 }
1968
1969 public boolean carbons() {
1970 return hasDiscoFeature(account.getDomain(), "urn:xmpp:carbons:2");
1971 }
1972
1973 public boolean commands() {
1974 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
1975 }
1976
1977 public boolean easyOnboardingInvites() {
1978 synchronized (commands) {
1979 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
1980 }
1981 }
1982
1983 public boolean bookmarksConversion() {
1984 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1985 }
1986
1987 public boolean avatarConversion() {
1988 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION) && pepPublishOptions();
1989 }
1990
1991 public boolean blocking() {
1992 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
1993 }
1994
1995 public boolean spamReporting() {
1996 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
1997 }
1998
1999 public boolean flexibleOfflineMessageRetrieval() {
2000 return hasDiscoFeature(account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2001 }
2002
2003 public boolean register() {
2004 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2005 }
2006
2007 public boolean invite() {
2008 return connection.streamFeatures != null && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2009 }
2010
2011 public boolean sm() {
2012 return streamId != null
2013 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
2014 }
2015
2016 public boolean csi() {
2017 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
2018 }
2019
2020 public boolean pep() {
2021 synchronized (XmppConnection.this.disco) {
2022 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2023 return info != null && info.hasIdentity("pubsub", "pep");
2024 }
2025 }
2026
2027 public boolean pepPersistent() {
2028 synchronized (XmppConnection.this.disco) {
2029 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2030 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
2031 }
2032 }
2033
2034 public boolean pepPublishOptions() {
2035 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2036 }
2037
2038 public boolean pepOmemoWhitelisted() {
2039 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2040 }
2041
2042 public boolean mam() {
2043 return MessageArchiveService.Version.has(getAccountFeatures());
2044 }
2045
2046 public List<String> getAccountFeatures() {
2047 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2048 return result == null ? Collections.emptyList() : result.getFeatures();
2049 }
2050
2051 public boolean push() {
2052 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2053 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2054 }
2055
2056 public boolean rosterVersioning() {
2057 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2058 }
2059
2060 public void setBlockListRequested(boolean value) {
2061 this.blockListRequested = value;
2062 }
2063
2064 public boolean httpUpload(long filesize) {
2065 if (Config.DISABLE_HTTP_UPLOAD) {
2066 return false;
2067 } else {
2068 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2069 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2070 if (items.size() > 0) {
2071 try {
2072 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2073 if (filesize <= maxsize) {
2074 return true;
2075 } else {
2076 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
2077 return false;
2078 }
2079 } catch (Exception e) {
2080 return true;
2081 }
2082 }
2083 }
2084 return false;
2085 }
2086 }
2087
2088 public boolean useLegacyHttpUpload() {
2089 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2090 }
2091
2092 public long getMaxHttpUploadSize() {
2093 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2094 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2095 if (items.size() > 0) {
2096 try {
2097 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2098 } catch (Exception e) {
2099 //ignored
2100 }
2101 }
2102 }
2103 return -1;
2104 }
2105
2106 public boolean stanzaIds() {
2107 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2108 }
2109
2110 public boolean bookmarks2() {
2111 return Config.USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
2112 }
2113
2114 public boolean externalServiceDiscovery() {
2115 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2116 }
2117 }
2118}