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) throws StateChangingException {
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 if (h == null) {
704 resetStreamId();
705 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
706 }
707 final int serverCount;
708 try {
709 serverCount = Integer.parseInt(h);
710 } catch (final NumberFormatException e) {
711 resetStreamId();
712 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
713 }
714 final ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
715 final boolean acknowledgedMessages;
716 synchronized (this.mStanzaQueue) {
717 if (serverCount < stanzasSent) {
718 Log.d(
719 Config.LOGTAG,
720 account.getJid().asBareJid() + ": session resumed with lost packages");
721 stanzasSent = serverCount;
722 } else {
723 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": session resumed");
724 }
725 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
726 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
727 failedStanzas.add(mStanzaQueue.valueAt(i));
728 }
729 mStanzaQueue.clear();
730 }
731 if (acknowledgedMessages) {
732 mXmppConnectionService.updateConversationUi();
733 }
734 Log.d(
735 Config.LOGTAG,
736 account.getJid().asBareJid() + ": resending " + failedStanzas.size() + " stanzas");
737 for (final AbstractAcknowledgeableStanza packet : failedStanzas) {
738 if (packet instanceof MessagePacket) {
739 MessagePacket message = (MessagePacket) packet;
740 mXmppConnectionService.markMessage(
741 account,
742 message.getTo().asBareJid(),
743 message.getId(),
744 Message.STATUS_UNSEND);
745 }
746 sendPacket(packet);
747 }
748 Log.d(
749 Config.LOGTAG,
750 account.getJid().asBareJid() + ": online with resource " + account.getResource());
751 changeStatus(Account.State.ONLINE);
752 }
753
754 private boolean acknowledgeStanzaUpTo(int serverCount) {
755 if (serverCount > stanzasSent) {
756 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
757 }
758 boolean acknowledgedMessages = false;
759 for (int i = 0; i < mStanzaQueue.size(); ++i) {
760 if (serverCount >= mStanzaQueue.keyAt(i)) {
761 if (Config.EXTENDED_SM_LOGGING) {
762 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
763 }
764 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
765 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
766 final MessagePacket packet = (MessagePacket) stanza;
767 final String id = packet.getId();
768 final Jid to = packet.getTo();
769 if (id != null && to != null) {
770 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, to, id);
771 }
772 }
773 mStanzaQueue.removeAt(i);
774 i--;
775 }
776 }
777 return acknowledgedMessages;
778 }
779
780 private @NonNull
781 Element processPacket(final Tag currentTag, final int packetType) throws IOException {
782 final Element element;
783 switch (packetType) {
784 case PACKET_IQ:
785 element = new IqPacket();
786 break;
787 case PACKET_MESSAGE:
788 element = new MessagePacket();
789 break;
790 case PACKET_PRESENCE:
791 element = new PresencePacket();
792 break;
793 default:
794 throw new AssertionError("Should never encounter invalid type");
795 }
796 element.setAttributes(currentTag.getAttributes());
797 Tag nextTag = tagReader.readTag();
798 if (nextTag == null) {
799 throw new IOException("interrupted mid tag");
800 }
801 while (!nextTag.isEnd(element.getName())) {
802 if (!nextTag.isNo()) {
803 element.addChild(tagReader.readElement(nextTag));
804 }
805 nextTag = tagReader.readTag();
806 if (nextTag == null) {
807 throw new IOException("interrupted mid tag");
808 }
809 }
810 if (stanzasReceived == Integer.MAX_VALUE) {
811 resetStreamId();
812 throw new IOException("time to restart the session. cant handle >2 billion pcks");
813 }
814 if (inSmacksSession) {
815 ++stanzasReceived;
816 } else if (features.sm()) {
817 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
818 }
819 lastPacketReceived = SystemClock.elapsedRealtime();
820 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
821 Log.d(Config.LOGTAG, "[background stanza] " + element);
822 }
823 if (element instanceof IqPacket
824 && (((IqPacket) element).getType() == IqPacket.TYPE.SET)
825 && element.hasChild("jingle", Namespace.JINGLE)) {
826 return JinglePacket.upgrade((IqPacket) element);
827 } else {
828 return element;
829 }
830 }
831
832 private void processIq(final Tag currentTag) throws IOException {
833 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
834 if (!packet.valid()) {
835 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
836 return;
837 }
838 if (packet instanceof JinglePacket) {
839 if (this.jingleListener != null) {
840 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
841 }
842 } else {
843 OnIqPacketReceived callback = null;
844 synchronized (this.packetCallbacks) {
845 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
846 if (packetCallbackDuple != null) {
847 // Packets to the server should have responses from the server
848 if (packetCallbackDuple.first.toServer(account)) {
849 if (packet.fromServer(account)) {
850 callback = packetCallbackDuple.second;
851 packetCallbacks.remove(packet.getId());
852 } else {
853 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
854 }
855 } else {
856 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
857 callback = packetCallbackDuple.second;
858 packetCallbacks.remove(packet.getId());
859 } else {
860 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
861 }
862 }
863 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
864 callback = this.unregisteredIqListener;
865 }
866 }
867 if (callback != null) {
868 try {
869 callback.onIqPacketReceived(account, packet);
870 } catch (StateChangingError error) {
871 throw new StateChangingException(error.state);
872 }
873 }
874 }
875 }
876
877 private void processMessage(final Tag currentTag) throws IOException {
878 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
879 if (!packet.valid()) {
880 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
881 return;
882 }
883 this.messageListener.onMessagePacketReceived(account, packet);
884 }
885
886 private void processPresence(final Tag currentTag) throws IOException {
887 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
888 if (!packet.valid()) {
889 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
890 return;
891 }
892 this.presenceListener.onPresencePacketReceived(account, packet);
893 }
894
895 private void sendStartTLS() throws IOException {
896 final Tag startTLS = Tag.empty("starttls");
897 startTLS.setAttribute("xmlns", Namespace.TLS);
898 tagWriter.writeTag(startTLS);
899 }
900
901 private void switchOverToTls() throws XmlPullParserException, IOException {
902 tagReader.readTag();
903 final Socket socket = this.socket;
904 final SSLSocket sslSocket = upgradeSocketToTls(socket);
905 tagReader.setInputStream(sslSocket.getInputStream());
906 tagWriter.setOutputStream(sslSocket.getOutputStream());
907 sendStartStream();
908 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
909 features.encryptionEnabled = true;
910 final Tag tag = tagReader.readTag();
911 if (tag != null && tag.isStart("stream")) {
912 SSLSocketHelper.log(account, sslSocket);
913 processStream();
914 } else {
915 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
916 }
917 sslSocket.close();
918 }
919
920 private SSLSocket upgradeSocketToTls(final Socket socket) throws IOException {
921 final SSLSocketFactory sslSocketFactory;
922 try {
923 sslSocketFactory = getSSLSocketFactory();
924 } catch (final NoSuchAlgorithmException | KeyManagementException e) {
925 throw new StateChangingException(Account.State.TLS_ERROR);
926 }
927 final InetAddress address = socket.getInetAddress();
928 final SSLSocket sslSocket = (SSLSocket) sslSocketFactory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
929 SSLSocketHelper.setSecurity(sslSocket);
930 SSLSocketHelper.setHostname(sslSocket, IDN.toASCII(account.getServer()));
931 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
932 final XmppDomainVerifier xmppDomainVerifier = new XmppDomainVerifier();
933 try {
934 if (!xmppDomainVerifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
935 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate domain verification failed");
936 FileBackend.close(sslSocket);
937 throw new StateChangingException(Account.State.TLS_ERROR_DOMAIN);
938 }
939 } catch (final SSLPeerUnverifiedException e) {
940 FileBackend.close(sslSocket);
941 throw new StateChangingException(Account.State.TLS_ERROR);
942 }
943 return sslSocket;
944 }
945
946 private void processStreamFeatures(final Tag currentTag) throws IOException {
947 this.streamFeatures = tagReader.readElement(currentTag);
948 final boolean isSecure =
949 features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS || account.isOnion();
950 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
951 if (this.streamFeatures.hasChild("starttls", Namespace.TLS)
952 && !features.encryptionEnabled) {
953 sendStartTLS();
954 } else if (this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
955 && account.isOptionSet(Account.OPTION_REGISTER)) {
956 if (isSecure) {
957 register();
958 } else {
959 Log.d(
960 Config.LOGTAG,
961 account.getJid().asBareJid()
962 + ": unable to find STARTTLS for registration process "
963 + XmlHelper.printElementNames(this.streamFeatures));
964 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
965 }
966 } else if (!this.streamFeatures.hasChild("register", Namespace.REGISTER_STREAM_FEATURE)
967 && account.isOptionSet(Account.OPTION_REGISTER)) {
968 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
969 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL_2)
970 && shouldAuthenticate
971 && isSecure) {
972 authenticate(SaslMechanism.Version.SASL_2);
973 } else if (this.streamFeatures.hasChild("mechanisms", Namespace.SASL)
974 && shouldAuthenticate
975 && isSecure) {
976 authenticate(SaslMechanism.Version.SASL);
977 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion)
978 && streamId != null) {
979 if (Config.EXTENDED_SM_LOGGING) {
980 Log.d(
981 Config.LOGTAG,
982 account.getJid().asBareJid()
983 + ": resuming after stanza #"
984 + stanzasReceived);
985 }
986 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
987 this.mSmCatchupMessageCounter.set(0);
988 this.mWaitingForSmCatchup.set(true);
989 this.tagWriter.writeStanzaAsync(resume);
990 } else if (needsBinding) {
991 if (this.streamFeatures.hasChild("bind", Namespace.BIND) && isSecure) {
992 sendBindRequest();
993 } else {
994 Log.d(
995 Config.LOGTAG,
996 account.getJid().asBareJid()
997 + ": unable to find bind feature "
998 + XmlHelper.printElementNames(this.streamFeatures));
999 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1000 }
1001 } else {
1002 Log.d(
1003 Config.LOGTAG,
1004 account.getJid().asBareJid()
1005 + ": received NOP stream features "
1006 + this.streamFeatures);
1007 }
1008 }
1009
1010 private void authenticate(final SaslMechanism.Version version) throws IOException {
1011 final List<String> mechanisms = extractMechanisms(streamFeatures.findChild("mechanisms"));
1012 if (mechanisms.contains(External.MECHANISM) && account.getPrivateKeyAlias() != null) {
1013 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
1014 } else if (mechanisms.contains(ScramSha512.MECHANISM)) {
1015 saslMechanism = new ScramSha512(tagWriter, account, mXmppConnectionService.getRNG());
1016 } else if (mechanisms.contains(ScramSha256.MECHANISM)) {
1017 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
1018 } else if (mechanisms.contains(ScramSha1.MECHANISM)) {
1019 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
1020 } else if (mechanisms.contains(Plain.MECHANISM) && !account.getJid().getDomain().toEscapedString().equals("nimbuzz.com")) {
1021 saslMechanism = new Plain(tagWriter, account);
1022 } else if (mechanisms.contains(DigestMd5.MECHANISM)) {
1023 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
1024 } else if (mechanisms.contains(Anonymous.MECHANISM)) {
1025 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
1026 }
1027 if (saslMechanism == null) {
1028 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": unable to find supported SASL mechanism in " + mechanisms);
1029 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
1030 }
1031 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
1032 if (pinnedMechanism > saslMechanism.getPriority()) {
1033 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
1034 " has lower priority (" + saslMechanism.getPriority() +
1035 ") than pinned priority (" + pinnedMechanism +
1036 "). Possible downgrade attack?");
1037 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
1038 }
1039 final String firstMessage = saslMechanism.getClientFirstMessage();
1040 final Element authenticate;
1041 if (version == SaslMechanism.Version.SASL) {
1042 authenticate = new Element("auth", Namespace.SASL);
1043 if (!Strings.isNullOrEmpty(firstMessage)) {
1044 authenticate.setContent(firstMessage);
1045 }
1046 } else if (version == SaslMechanism.Version.SASL_2) {
1047 authenticate = new Element("authenticate", Namespace.SASL_2);
1048 if (!Strings.isNullOrEmpty(firstMessage)) {
1049 authenticate.addChild("initial-response").setContent(firstMessage);
1050 }
1051 final Element inline = this.streamFeatures.findChild("inline", Namespace.SASL_2);
1052 final boolean inlineStreamManagement = inline != null && inline.hasChild("sm", "urn:xmpp:sm:3");
1053 if (inlineStreamManagement && streamId != null) {
1054 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
1055 this.mSmCatchupMessageCounter.set(0);
1056 this.mWaitingForSmCatchup.set(true);
1057 authenticate.addChild(resume);
1058 }
1059 } else {
1060 throw new AssertionError("Missing implementation for " + version);
1061 }
1062
1063 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with "+version+ "/" + saslMechanism.getMechanism());
1064 authenticate.setAttribute("mechanism", saslMechanism.getMechanism());
1065 tagWriter.writeElement(authenticate);
1066 }
1067
1068 private List<String> extractMechanisms(final Element stream) {
1069 final ArrayList<String> mechanisms = new ArrayList<>(stream
1070 .getChildren().size());
1071 for (final Element child : stream.getChildren()) {
1072 mechanisms.add(child.getContent());
1073 }
1074 return mechanisms;
1075 }
1076
1077
1078 private void register() {
1079 final String preAuth = account.getKey(Account.PRE_AUTH_REGISTRATION_TOKEN);
1080 if (preAuth != null && features.invite()) {
1081 final IqPacket preAuthRequest = new IqPacket(IqPacket.TYPE.SET);
1082 preAuthRequest.addChild("preauth", Namespace.PARS).setAttribute("token", preAuth);
1083 sendUnmodifiedIqPacket(preAuthRequest, (account, response) -> {
1084 if (response.getType() == IqPacket.TYPE.RESULT) {
1085 sendRegistryRequest();
1086 } else {
1087 final String error = response.getErrorCondition();
1088 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": failed to pre auth. " + error);
1089 throw new StateChangingError(Account.State.REGISTRATION_INVALID_TOKEN);
1090 }
1091 }, true);
1092 } else {
1093 sendRegistryRequest();
1094 }
1095 }
1096
1097 private void sendRegistryRequest() {
1098 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
1099 register.query(Namespace.REGISTER);
1100 register.setTo(account.getDomain());
1101 sendUnmodifiedIqPacket(register, (account, packet) -> {
1102 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1103 return;
1104 }
1105 if (packet.getType() == IqPacket.TYPE.ERROR) {
1106 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1107 }
1108 final Element query = packet.query(Namespace.REGISTER);
1109 if (query.hasChild("username") && (query.hasChild("password"))) {
1110 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
1111 final Element username = new Element("username").setContent(account.getUsername());
1112 final Element password = new Element("password").setContent(account.getPassword());
1113 register1.query(Namespace.REGISTER).addChild(username);
1114 register1.query().addChild(password);
1115 register1.setFrom(account.getJid().asBareJid());
1116 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
1117 } else if (query.hasChild("x", Namespace.DATA)) {
1118 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
1119 final Element blob = query.findChild("data", "urn:xmpp:bob");
1120 final String id = packet.getId();
1121 InputStream is;
1122 if (blob != null) {
1123 try {
1124 final String base64Blob = blob.getContent();
1125 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
1126 is = new ByteArrayInputStream(strBlob);
1127 } catch (Exception e) {
1128 is = null;
1129 }
1130 } else {
1131 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
1132 try {
1133 final String url = data.getValue("url");
1134 final String fallbackUrl = data.getValue("captcha-fallback-url");
1135 if (url != null) {
1136 is = HttpConnectionManager.open(url, useTor);
1137 } else if (fallbackUrl != null) {
1138 is = HttpConnectionManager.open(fallbackUrl, useTor);
1139 } else {
1140 is = null;
1141 }
1142 } catch (final IOException e) {
1143 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": unable to fetch captcha", e);
1144 is = null;
1145 }
1146 }
1147
1148 if (is != null) {
1149 Bitmap captcha = BitmapFactory.decodeStream(is);
1150 try {
1151 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
1152 return;
1153 }
1154 } catch (Exception e) {
1155 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1156 }
1157 }
1158 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1159 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
1160 final String instructions = query.findChildContent("instructions");
1161 final Element oob = query.findChild("x", Namespace.OOB);
1162 final String url = oob == null ? null : oob.findChildContent("url");
1163 if (url != null) {
1164 setAccountCreationFailed(url);
1165 } else if (instructions != null) {
1166 final Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
1167 if (matcher.find()) {
1168 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
1169 }
1170 }
1171 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1172 }
1173 }, true);
1174 }
1175
1176 private void setAccountCreationFailed(final String url) {
1177 final HttpUrl httpUrl = url == null ? null : HttpUrl.parse(url);
1178 if (httpUrl != null && httpUrl.isHttps()) {
1179 this.redirectionUrl = httpUrl;
1180 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1181 }
1182 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1183 }
1184
1185 public HttpUrl getRedirectionUrl() {
1186 return this.redirectionUrl;
1187 }
1188
1189 public void resetEverything() {
1190 resetAttemptCount(true);
1191 resetStreamId();
1192 clearIqCallbacks();
1193 this.stanzasSent = 0;
1194 mStanzaQueue.clear();
1195 this.redirectionUrl = null;
1196 synchronized (this.disco) {
1197 disco.clear();
1198 }
1199 synchronized (this.commands) {
1200 this.commands.clear();
1201 }
1202 }
1203
1204 private void sendBindRequest() {
1205 try {
1206 mXmppConnectionService.restoredFromDatabaseLatch.await();
1207 } catch (InterruptedException e) {
1208 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1209 return;
1210 }
1211 clearIqCallbacks();
1212 if (account.getJid().isBareJid()) {
1213 account.setResource(this.createNewResource());
1214 } else {
1215 fixResource(mXmppConnectionService, account);
1216 }
1217 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1218 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1219 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1220 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1221 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1222 return;
1223 }
1224 final Element bind = packet.findChild("bind");
1225 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1226 isBound = true;
1227 final Element jid = bind.findChild("jid");
1228 if (jid != null && jid.getContent() != null) {
1229 try {
1230 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1231 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1232 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1233 throw new StateChangingError(Account.State.BIND_FAILURE);
1234 }
1235 if (account.setJid(assignedJid)) {
1236 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1237 mXmppConnectionService.databaseBackend.updateAccount(account);
1238 }
1239 if (streamFeatures.hasChild("session")
1240 && !streamFeatures.findChild("session").hasChild("optional")) {
1241 sendStartSession();
1242 } else {
1243 sendPostBindInitialization();
1244 }
1245 return;
1246 } catch (final IllegalArgumentException e) {
1247 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1248 }
1249 } else {
1250 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1251 }
1252 } else {
1253 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet);
1254 }
1255 final Element error = packet.findChild("error");
1256 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1257 account.setResource(createNewResource());
1258 }
1259 throw new StateChangingError(Account.State.BIND_FAILURE);
1260 }, true);
1261 }
1262
1263 private void clearIqCallbacks() {
1264 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1265 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1266 synchronized (this.packetCallbacks) {
1267 if (this.packetCallbacks.size() == 0) {
1268 return;
1269 }
1270 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1271 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1272 while (iterator.hasNext()) {
1273 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1274 callbacks.add(entry.second);
1275 iterator.remove();
1276 }
1277 }
1278 for (OnIqPacketReceived callback : callbacks) {
1279 try {
1280 callback.onIqPacketReceived(account, failurePacket);
1281 } catch (StateChangingError error) {
1282 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1283 //ignore
1284 }
1285 }
1286 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1287 }
1288
1289 public void sendDiscoTimeout() {
1290 if (mWaitForDisco.compareAndSet(true, false)) {
1291 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1292 finalizeBind();
1293 }
1294 }
1295
1296 private void sendStartSession() {
1297 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1298 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1299 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1300 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1301 if (packet.getType() == IqPacket.TYPE.RESULT) {
1302 sendPostBindInitialization();
1303 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1304 throw new StateChangingError(Account.State.SESSION_FAILURE);
1305 }
1306 }, true);
1307 }
1308
1309 private void sendPostBindInitialization() {
1310 smVersion = 0;
1311 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1312 smVersion = 3;
1313 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1314 smVersion = 2;
1315 }
1316 if (smVersion != 0) {
1317 synchronized (this.mStanzaQueue) {
1318 final EnablePacket enable = new EnablePacket(smVersion);
1319 tagWriter.writeStanzaAsync(enable);
1320 stanzasSent = 0;
1321 mStanzaQueue.clear();
1322 }
1323 }
1324 features.carbonsEnabled = false;
1325 features.blockListRequested = false;
1326 synchronized (this.disco) {
1327 this.disco.clear();
1328 }
1329 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1330 mPendingServiceDiscoveries.set(0);
1331 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain().toEscapedString())) {
1332 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1333 mWaitForDisco.set(false);
1334 } else {
1335 mWaitForDisco.set(true);
1336 }
1337 lastDiscoStarted = SystemClock.elapsedRealtime();
1338 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1339 Element caps = streamFeatures.findChild("c");
1340 final String hash = caps == null ? null : caps.getAttribute("hash");
1341 final String ver = caps == null ? null : caps.getAttribute("ver");
1342 ServiceDiscoveryResult discoveryResult = null;
1343 if (hash != null && ver != null) {
1344 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1345 }
1346 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1347 if (requestDiscoItemsFirst) {
1348 sendServiceDiscoveryItems(account.getDomain());
1349 }
1350 if (discoveryResult == null) {
1351 sendServiceDiscoveryInfo(account.getDomain());
1352 } else {
1353 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1354 disco.put(account.getDomain(), discoveryResult);
1355 }
1356 discoverMamPreferences();
1357 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1358 if (!requestDiscoItemsFirst) {
1359 sendServiceDiscoveryItems(account.getDomain());
1360 }
1361
1362 if (!mWaitForDisco.get()) {
1363 finalizeBind();
1364 }
1365 this.lastSessionStarted = SystemClock.elapsedRealtime();
1366 }
1367
1368 private void sendServiceDiscoveryInfo(final Jid jid) {
1369 mPendingServiceDiscoveries.incrementAndGet();
1370 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1371 iq.setTo(jid);
1372 iq.query("http://jabber.org/protocol/disco#info");
1373 this.sendIqPacket(iq, (account, packet) -> {
1374 if (packet.getType() == IqPacket.TYPE.RESULT) {
1375 boolean advancedStreamFeaturesLoaded;
1376 synchronized (XmppConnection.this.disco) {
1377 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1378 if (jid.equals(account.getDomain())) {
1379 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1380 }
1381 disco.put(jid, result);
1382 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain())
1383 && disco.containsKey(account.getJid().asBareJid());
1384 }
1385 if (advancedStreamFeaturesLoaded && (jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid()))) {
1386 enableAdvancedStreamFeatures();
1387 }
1388 } else if (packet.getType() == IqPacket.TYPE.ERROR) {
1389 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1390 final boolean serverOrAccount = jid.equals(account.getDomain()) || jid.equals(account.getJid().asBareJid());
1391 final boolean advancedStreamFeaturesLoaded;
1392 if (serverOrAccount) {
1393 synchronized (XmppConnection.this.disco) {
1394 disco.put(jid, ServiceDiscoveryResult.empty());
1395 advancedStreamFeaturesLoaded = disco.containsKey(account.getDomain()) && disco.containsKey(account.getJid().asBareJid());
1396 }
1397 } else {
1398 advancedStreamFeaturesLoaded = false;
1399 }
1400 if (advancedStreamFeaturesLoaded) {
1401 enableAdvancedStreamFeatures();
1402 }
1403 }
1404 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1405 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1406 && mWaitForDisco.compareAndSet(true, false)) {
1407 finalizeBind();
1408 }
1409 }
1410 });
1411 }
1412
1413 private void discoverMamPreferences() {
1414 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1415 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1416 sendIqPacket(request, (account, response) -> {
1417 if (response.getType() == IqPacket.TYPE.RESULT) {
1418 Element prefs = response.findChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1419 isMamPreferenceAlways = "always".equals(prefs == null ? null : prefs.getAttribute("default"));
1420 }
1421 });
1422 }
1423
1424 private void discoverCommands() {
1425 final IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1426 request.setTo(account.getDomain());
1427 request.addChild("query", Namespace.DISCO_ITEMS).setAttribute("node", Namespace.COMMANDS);
1428 sendIqPacket(request, (account, response) -> {
1429 if (response.getType() == IqPacket.TYPE.RESULT) {
1430 final Element query = response.findChild("query", Namespace.DISCO_ITEMS);
1431 if (query == null) {
1432 return;
1433 }
1434 final HashMap<String, Jid> commands = new HashMap<>();
1435 for (final Element child : query.getChildren()) {
1436 if ("item".equals(child.getName())) {
1437 final String node = child.getAttribute("node");
1438 final Jid jid = child.getAttributeAsJid("jid");
1439 if (node != null && jid != null) {
1440 commands.put(node, jid);
1441 }
1442 }
1443 }
1444 Log.d(Config.LOGTAG, commands.toString());
1445 synchronized (this.commands) {
1446 this.commands.clear();
1447 this.commands.putAll(commands);
1448 }
1449 }
1450 });
1451 }
1452
1453 public boolean isMamPreferenceAlways() {
1454 return isMamPreferenceAlways;
1455 }
1456
1457 private void finalizeBind() {
1458 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1459 if (bindListener != null) {
1460 bindListener.onBind(account);
1461 }
1462 changeStatus(Account.State.ONLINE);
1463 }
1464
1465 private void enableAdvancedStreamFeatures() {
1466 if (getFeatures().blocking() && !features.blockListRequested) {
1467 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1468 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1469 }
1470 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1471 listener.onAdvancedStreamFeaturesAvailable(account);
1472 }
1473 if (getFeatures().carbons() && !features.carbonsEnabled) {
1474 sendEnableCarbons();
1475 }
1476 if (getFeatures().commands()) {
1477 discoverCommands();
1478 }
1479 }
1480
1481 private void sendServiceDiscoveryItems(final Jid server) {
1482 mPendingServiceDiscoveries.incrementAndGet();
1483 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1484 iq.setTo(server.getDomain());
1485 iq.query("http://jabber.org/protocol/disco#items");
1486 this.sendIqPacket(iq, (account, packet) -> {
1487 if (packet.getType() == IqPacket.TYPE.RESULT) {
1488 final HashSet<Jid> items = new HashSet<>();
1489 final List<Element> elements = packet.query().getChildren();
1490 for (final Element element : elements) {
1491 if (element.getName().equals("item")) {
1492 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1493 if (jid != null && !jid.equals(account.getDomain())) {
1494 items.add(jid);
1495 }
1496 }
1497 }
1498 for (Jid jid : items) {
1499 sendServiceDiscoveryInfo(jid);
1500 }
1501 } else {
1502 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1503 }
1504 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1505 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1506 && mWaitForDisco.compareAndSet(true, false)) {
1507 finalizeBind();
1508 }
1509 }
1510 });
1511 }
1512
1513 private void sendEnableCarbons() {
1514 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1515 iq.addChild("enable", "urn:xmpp:carbons:2");
1516 this.sendIqPacket(iq, (account, packet) -> {
1517 if (!packet.hasChild("error")) {
1518 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1519 + ": successfully enabled carbons");
1520 features.carbonsEnabled = true;
1521 } else {
1522 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1523 + ": could not enable carbons " + packet);
1524 }
1525 });
1526 }
1527
1528 private void processStreamError(final Tag currentTag) throws IOException {
1529 final Element streamError = tagReader.readElement(currentTag);
1530 if (streamError == null) {
1531 return;
1532 }
1533 if (streamError.hasChild("conflict")) {
1534 account.setResource(createNewResource());
1535 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1536 throw new IOException();
1537 } else if (streamError.hasChild("host-unknown")) {
1538 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1539 } else if (streamError.hasChild("policy-violation")) {
1540 this.lastConnect = SystemClock.elapsedRealtime();
1541 final String text = streamError.findChildContent("text");
1542 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": policy violation. " + text);
1543 failPendingMessages(text);
1544 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1545 } else {
1546 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError);
1547 throw new StateChangingException(Account.State.STREAM_ERROR);
1548 }
1549 }
1550
1551 private void failPendingMessages(final String error) {
1552 synchronized (this.mStanzaQueue) {
1553 for (int i = 0; i < mStanzaQueue.size(); ++i) {
1554 final AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
1555 if (stanza instanceof MessagePacket) {
1556 final MessagePacket packet = (MessagePacket) stanza;
1557 final String id = packet.getId();
1558 final Jid to = packet.getTo();
1559 mXmppConnectionService.markMessage(account,
1560 to.asBareJid(),
1561 id,
1562 Message.STATUS_SEND_FAILED,
1563 error);
1564 }
1565 }
1566 }
1567 }
1568
1569 private void sendStartStream() throws IOException {
1570 final Tag stream = Tag.start("stream:stream");
1571 stream.setAttribute("to", account.getServer());
1572 stream.setAttribute("version", "1.0");
1573 stream.setAttribute("xml:lang", LocalizedContent.STREAM_LANGUAGE);
1574 stream.setAttribute("xmlns", "jabber:client");
1575 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1576 tagWriter.writeTag(stream);
1577 }
1578
1579 private String createNewResource() {
1580 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1581 }
1582
1583 private String nextRandomId() {
1584 return nextRandomId(false);
1585 }
1586
1587 private String nextRandomId(boolean s) {
1588 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1589 }
1590
1591 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1592 packet.setFrom(account.getJid());
1593 return this.sendUnmodifiedIqPacket(packet, callback, false);
1594 }
1595
1596 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1597 if (packet.getId() == null) {
1598 packet.setAttribute("id", nextRandomId());
1599 }
1600 if (callback != null) {
1601 synchronized (this.packetCallbacks) {
1602 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1603 }
1604 }
1605 this.sendPacket(packet, force);
1606 return packet.getId();
1607 }
1608
1609 public void sendMessagePacket(final MessagePacket packet) {
1610 this.sendPacket(packet);
1611 }
1612
1613 public void sendPresencePacket(final PresencePacket packet) {
1614 this.sendPacket(packet);
1615 }
1616
1617 private synchronized void sendPacket(final AbstractStanza packet) {
1618 sendPacket(packet, false);
1619 }
1620
1621 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1622 if (stanzasSent == Integer.MAX_VALUE) {
1623 resetStreamId();
1624 disconnect(true);
1625 return;
1626 }
1627 synchronized (this.mStanzaQueue) {
1628 if (force || isBound) {
1629 tagWriter.writeStanzaAsync(packet);
1630 } else {
1631 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1632 }
1633 if (packet instanceof AbstractAcknowledgeableStanza) {
1634 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1635
1636 if (this.mStanzaQueue.size() != 0) {
1637 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1638 if (currentHighestKey != stanzasSent) {
1639 throw new AssertionError("Stanza count messed up");
1640 }
1641 }
1642
1643 ++stanzasSent;
1644 this.mStanzaQueue.append(stanzasSent, stanza);
1645 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1646 if (Config.EXTENDED_SM_LOGGING) {
1647 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1648 }
1649 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1650 }
1651 }
1652 }
1653 }
1654
1655 public void sendPing() {
1656 if (!r()) {
1657 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1658 iq.setFrom(account.getJid());
1659 iq.addChild("ping", Namespace.PING);
1660 this.sendIqPacket(iq, null);
1661 }
1662 this.lastPingSent = SystemClock.elapsedRealtime();
1663 }
1664
1665 public void setOnMessagePacketReceivedListener(
1666 final OnMessagePacketReceived listener) {
1667 this.messageListener = listener;
1668 }
1669
1670 public void setOnUnregisteredIqPacketReceivedListener(
1671 final OnIqPacketReceived listener) {
1672 this.unregisteredIqListener = listener;
1673 }
1674
1675 public void setOnPresencePacketReceivedListener(
1676 final OnPresencePacketReceived listener) {
1677 this.presenceListener = listener;
1678 }
1679
1680 public void setOnJinglePacketReceivedListener(
1681 final OnJinglePacketReceived listener) {
1682 this.jingleListener = listener;
1683 }
1684
1685 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1686 this.statusListener = listener;
1687 }
1688
1689 public void setOnBindListener(final OnBindListener listener) {
1690 this.bindListener = listener;
1691 }
1692
1693 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1694 this.acknowledgedListener = listener;
1695 }
1696
1697 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1698 this.advancedStreamFeaturesLoadedListeners.add(listener);
1699 }
1700
1701 private void forceCloseSocket() {
1702 FileBackend.close(this.socket);
1703 FileBackend.close(this.tagReader);
1704 }
1705
1706 public void interrupt() {
1707 if (this.mThread != null) {
1708 this.mThread.interrupt();
1709 }
1710 }
1711
1712 public void disconnect(final boolean force) {
1713 interrupt();
1714 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + force);
1715 if (force) {
1716 forceCloseSocket();
1717 } else {
1718 final TagWriter currentTagWriter = this.tagWriter;
1719 if (currentTagWriter.isActive()) {
1720 currentTagWriter.finish();
1721 final Socket currentSocket = this.socket;
1722 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1723 try {
1724 currentTagWriter.await(1, TimeUnit.SECONDS);
1725 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1726 currentTagWriter.writeTag(Tag.end("stream:stream"));
1727 if (streamCountDownLatch != null) {
1728 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1729 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1730 } else {
1731 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1732 }
1733 }
1734 } catch (InterruptedException e) {
1735 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1736 } catch (final IOException e) {
1737 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1738 } finally {
1739 FileBackend.close(currentSocket);
1740 }
1741 } else {
1742 forceCloseSocket();
1743 }
1744 }
1745 }
1746
1747 private void resetStreamId() {
1748 this.streamId = null;
1749 }
1750
1751 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1752 synchronized (this.disco) {
1753 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1754 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1755 if (cursor.getValue().getFeatures().contains(feature)) {
1756 items.add(cursor);
1757 }
1758 }
1759 return items;
1760 }
1761 }
1762
1763 public Jid findDiscoItemByFeature(final String feature) {
1764 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1765 if (items.size() >= 1) {
1766 return items.get(0).getKey();
1767 }
1768 return null;
1769 }
1770
1771 public boolean r() {
1772 if (getFeatures().sm()) {
1773 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1774 return true;
1775 } else {
1776 return false;
1777 }
1778 }
1779
1780 public List<String> getMucServersWithholdAccount() {
1781 final List<String> servers = getMucServers();
1782 servers.remove(account.getDomain().toEscapedString());
1783 return servers;
1784 }
1785
1786 public List<String> getMucServers() {
1787 List<String> servers = new ArrayList<>();
1788 synchronized (this.disco) {
1789 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1790 final ServiceDiscoveryResult value = cursor.getValue();
1791 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1792 && value.hasIdentity("conference", "text")
1793 && !value.getFeatures().contains("jabber:iq:gateway")
1794 && !value.hasIdentity("conference", "irc")) {
1795 servers.add(cursor.getKey().toString());
1796 }
1797 }
1798 }
1799 return servers;
1800 }
1801
1802 public String getMucServer() {
1803 List<String> servers = getMucServers();
1804 return servers.size() > 0 ? servers.get(0) : null;
1805 }
1806
1807 public int getTimeToNextAttempt() {
1808 final int additionalTime = account.getLastErrorStatus() == Account.State.POLICY_VIOLATION ? 3 : 0;
1809 final int interval = Math.min((int) (25 * Math.pow(1.3, (additionalTime + attempt))), 300);
1810 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1811 return interval - secondsSinceLast;
1812 }
1813
1814 public int getAttempt() {
1815 return this.attempt;
1816 }
1817
1818 public Features getFeatures() {
1819 return this.features;
1820 }
1821
1822 public long getLastSessionEstablished() {
1823 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1824 return System.currentTimeMillis() - diff;
1825 }
1826
1827 public long getLastConnect() {
1828 return this.lastConnect;
1829 }
1830
1831 public long getLastPingSent() {
1832 return this.lastPingSent;
1833 }
1834
1835 public long getLastDiscoStarted() {
1836 return this.lastDiscoStarted;
1837 }
1838
1839 public long getLastPacketReceived() {
1840 return this.lastPacketReceived;
1841 }
1842
1843 public void sendActive() {
1844 this.sendPacket(new ActivePacket());
1845 }
1846
1847 public void sendInactive() {
1848 this.sendPacket(new InactivePacket());
1849 }
1850
1851 public void resetAttemptCount(boolean resetConnectTime) {
1852 this.attempt = 0;
1853 if (resetConnectTime) {
1854 this.lastConnect = 0;
1855 }
1856 }
1857
1858 public void setInteractive(boolean interactive) {
1859 this.mInteractive = interactive;
1860 }
1861
1862 public Identity getServerIdentity() {
1863 synchronized (this.disco) {
1864 ServiceDiscoveryResult result = disco.get(account.getJid().getDomain());
1865 if (result == null) {
1866 return Identity.UNKNOWN;
1867 }
1868 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1869 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1870 switch (id.getName()) {
1871 case "Prosody":
1872 return Identity.PROSODY;
1873 case "ejabberd":
1874 return Identity.EJABBERD;
1875 case "Slack-XMPP":
1876 return Identity.SLACK;
1877 }
1878 }
1879 }
1880 }
1881 return Identity.UNKNOWN;
1882 }
1883
1884 private IqGenerator getIqGenerator() {
1885 return mXmppConnectionService.getIqGenerator();
1886 }
1887
1888 public enum Identity {
1889 FACEBOOK,
1890 SLACK,
1891 EJABBERD,
1892 PROSODY,
1893 NIMBUZZ,
1894 UNKNOWN
1895 }
1896
1897 private class MyKeyManager implements X509KeyManager {
1898 @Override
1899 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1900 return account.getPrivateKeyAlias();
1901 }
1902
1903 @Override
1904 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1905 return null;
1906 }
1907
1908 @Override
1909 public X509Certificate[] getCertificateChain(String alias) {
1910 Log.d(Config.LOGTAG, "getting certificate chain");
1911 try {
1912 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1913 } catch (final Exception e) {
1914 Log.d(Config.LOGTAG, "could not get certificate chain", e);
1915 return new X509Certificate[0];
1916 }
1917 }
1918
1919 @Override
1920 public String[] getClientAliases(String s, Principal[] principals) {
1921 final String alias = account.getPrivateKeyAlias();
1922 return alias != null ? new String[]{alias} : new String[0];
1923 }
1924
1925 @Override
1926 public String[] getServerAliases(String s, Principal[] principals) {
1927 return new String[0];
1928 }
1929
1930 @Override
1931 public PrivateKey getPrivateKey(String alias) {
1932 try {
1933 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1934 } catch (Exception e) {
1935 return null;
1936 }
1937 }
1938 }
1939
1940 private static class StateChangingError extends Error {
1941 private final Account.State state;
1942
1943 public StateChangingError(Account.State state) {
1944 this.state = state;
1945 }
1946 }
1947
1948 private static class StateChangingException extends IOException {
1949 private final Account.State state;
1950
1951 public StateChangingException(Account.State state) {
1952 this.state = state;
1953 }
1954 }
1955
1956 public class Features {
1957 XmppConnection connection;
1958 private boolean carbonsEnabled = false;
1959 private boolean encryptionEnabled = false;
1960 private boolean blockListRequested = false;
1961
1962 public Features(final XmppConnection connection) {
1963 this.connection = connection;
1964 }
1965
1966 private boolean hasDiscoFeature(final Jid server, final String feature) {
1967 synchronized (XmppConnection.this.disco) {
1968 return connection.disco.containsKey(server) &&
1969 connection.disco.get(server).getFeatures().contains(feature);
1970 }
1971 }
1972
1973 public boolean carbons() {
1974 return hasDiscoFeature(account.getDomain(), "urn:xmpp:carbons:2");
1975 }
1976
1977 public boolean commands() {
1978 return hasDiscoFeature(account.getDomain(), Namespace.COMMANDS);
1979 }
1980
1981 public boolean easyOnboardingInvites() {
1982 synchronized (commands) {
1983 return commands.containsKey(Namespace.EASY_ONBOARDING_INVITE);
1984 }
1985 }
1986
1987 public boolean bookmarksConversion() {
1988 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1989 }
1990
1991 public boolean avatarConversion() {
1992 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.AVATAR_CONVERSION) && pepPublishOptions();
1993 }
1994
1995 public boolean blocking() {
1996 return hasDiscoFeature(account.getDomain(), Namespace.BLOCKING);
1997 }
1998
1999 public boolean spamReporting() {
2000 return hasDiscoFeature(account.getDomain(), "urn:xmpp:reporting:reason:spam:0");
2001 }
2002
2003 public boolean flexibleOfflineMessageRetrieval() {
2004 return hasDiscoFeature(account.getDomain(), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
2005 }
2006
2007 public boolean register() {
2008 return hasDiscoFeature(account.getDomain(), Namespace.REGISTER);
2009 }
2010
2011 public boolean invite() {
2012 return connection.streamFeatures != null && connection.streamFeatures.hasChild("register", Namespace.INVITE);
2013 }
2014
2015 public boolean sm() {
2016 return streamId != null
2017 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
2018 }
2019
2020 public boolean csi() {
2021 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
2022 }
2023
2024 public boolean pep() {
2025 synchronized (XmppConnection.this.disco) {
2026 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2027 return info != null && info.hasIdentity("pubsub", "pep");
2028 }
2029 }
2030
2031 public boolean pepPersistent() {
2032 synchronized (XmppConnection.this.disco) {
2033 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
2034 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
2035 }
2036 }
2037
2038 public boolean pepPublishOptions() {
2039 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
2040 }
2041
2042 public boolean pepOmemoWhitelisted() {
2043 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
2044 }
2045
2046 public boolean mam() {
2047 return MessageArchiveService.Version.has(getAccountFeatures());
2048 }
2049
2050 public List<String> getAccountFeatures() {
2051 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
2052 return result == null ? Collections.emptyList() : result.getFeatures();
2053 }
2054
2055 public boolean push() {
2056 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUSH)
2057 || hasDiscoFeature(account.getDomain(), Namespace.PUSH);
2058 }
2059
2060 public boolean rosterVersioning() {
2061 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
2062 }
2063
2064 public void setBlockListRequested(boolean value) {
2065 this.blockListRequested = value;
2066 }
2067
2068 public boolean httpUpload(long filesize) {
2069 if (Config.DISABLE_HTTP_UPLOAD) {
2070 return false;
2071 } else {
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 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2077 if (filesize <= maxsize) {
2078 return true;
2079 } else {
2080 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
2081 return false;
2082 }
2083 } catch (Exception e) {
2084 return true;
2085 }
2086 }
2087 }
2088 return false;
2089 }
2090 }
2091
2092 public boolean useLegacyHttpUpload() {
2093 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
2094 }
2095
2096 public long getMaxHttpUploadSize() {
2097 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
2098 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
2099 if (items.size() > 0) {
2100 try {
2101 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
2102 } catch (Exception e) {
2103 //ignored
2104 }
2105 }
2106 }
2107 return -1;
2108 }
2109
2110 public boolean stanzaIds() {
2111 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
2112 }
2113
2114 public boolean bookmarks2() {
2115 return Config.USE_BOOKMARKS2 /* || hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS2_COMPAT)*/;
2116 }
2117
2118 public boolean externalServiceDiscovery() {
2119 return hasDiscoFeature(account.getDomain(), Namespace.EXTERNAL_SERVICE_DISCOVERY);
2120 }
2121 }
2122}