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.support.annotation.NonNull;
9import android.util.Base64;
10import android.util.Log;
11import android.util.Pair;
12import android.util.SparseArray;
13
14import org.xmlpull.v1.XmlPullParserException;
15
16import java.io.ByteArrayInputStream;
17import java.io.IOException;
18import java.io.InputStream;
19import java.net.ConnectException;
20import java.net.IDN;
21import java.net.InetAddress;
22import java.net.InetSocketAddress;
23import java.net.MalformedURLException;
24import java.net.Socket;
25import java.net.URL;
26import java.net.UnknownHostException;
27import java.security.KeyManagementException;
28import java.security.NoSuchAlgorithmException;
29import java.security.Principal;
30import java.security.PrivateKey;
31import java.security.cert.X509Certificate;
32import java.util.ArrayList;
33import java.util.Arrays;
34import java.util.Collections;
35import java.util.HashMap;
36import java.util.HashSet;
37import java.util.Hashtable;
38import java.util.Iterator;
39import java.util.List;
40import java.util.Map.Entry;
41import java.util.Set;
42import java.util.concurrent.CountDownLatch;
43import java.util.concurrent.TimeUnit;
44import java.util.concurrent.atomic.AtomicBoolean;
45import java.util.concurrent.atomic.AtomicInteger;
46import java.util.regex.Matcher;
47
48import javax.net.ssl.KeyManager;
49import javax.net.ssl.SSLContext;
50import javax.net.ssl.SSLSession;
51import javax.net.ssl.SSLSocket;
52import javax.net.ssl.SSLSocketFactory;
53import javax.net.ssl.X509KeyManager;
54import javax.net.ssl.X509TrustManager;
55
56import eu.siacs.conversations.Config;
57import eu.siacs.conversations.R;
58import eu.siacs.conversations.crypto.DomainHostnameVerifier;
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.entities.Account;
69import eu.siacs.conversations.entities.Message;
70import eu.siacs.conversations.entities.ServiceDiscoveryResult;
71import eu.siacs.conversations.generator.IqGenerator;
72import eu.siacs.conversations.persistance.FileBackend;
73import eu.siacs.conversations.services.MemorizingTrustManager;
74import eu.siacs.conversations.services.MessageArchiveService;
75import eu.siacs.conversations.services.NotificationService;
76import eu.siacs.conversations.services.XmppConnectionService;
77import eu.siacs.conversations.utils.CryptoHelper;
78import eu.siacs.conversations.utils.IP;
79import eu.siacs.conversations.utils.Patterns;
80import eu.siacs.conversations.utils.Resolver;
81import eu.siacs.conversations.utils.SSLSocketHelper;
82import eu.siacs.conversations.utils.SocksSocketFactory;
83import eu.siacs.conversations.xml.Element;
84import eu.siacs.conversations.xml.Namespace;
85import eu.siacs.conversations.xml.Tag;
86import eu.siacs.conversations.xml.TagWriter;
87import eu.siacs.conversations.xml.XmlReader;
88import eu.siacs.conversations.xmpp.forms.Data;
89import eu.siacs.conversations.xmpp.forms.Field;
90import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
91import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
92import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
93import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
94import eu.siacs.conversations.xmpp.stanzas.IqPacket;
95import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
96import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
97import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
98import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
99import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
100import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
101import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
102import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
103import rocks.xmpp.addr.Jid;
104
105public class XmppConnection implements Runnable {
106
107 private static final int PACKET_IQ = 0;
108 private static final int PACKET_MESSAGE = 1;
109 private static final int PACKET_PRESENCE = 2;
110 public final OnIqPacketReceived registrationResponseListener = new OnIqPacketReceived() {
111 @Override
112 public void onIqPacketReceived(Account account, IqPacket packet) {
113 if (packet.getType() == IqPacket.TYPE.RESULT) {
114 account.setOption(Account.OPTION_REGISTER, false);
115 throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL);
116 } else {
117 final List<String> PASSWORD_TOO_WEAK_MSGS = Arrays.asList(
118 "The password is too weak",
119 "Please use a longer password.");
120 Element error = packet.findChild("error");
121 Account.State state = Account.State.REGISTRATION_FAILED;
122 if (error != null) {
123 if (error.hasChild("conflict")) {
124 state = Account.State.REGISTRATION_CONFLICT;
125 } else if (error.hasChild("resource-constraint")
126 && "wait".equals(error.getAttribute("type"))) {
127 state = Account.State.REGISTRATION_PLEASE_WAIT;
128 } else if (error.hasChild("not-acceptable")
129 && PASSWORD_TOO_WEAK_MSGS.contains(error.findChildContent("text"))) {
130 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
131 }
132 }
133 throw new StateChangingError(state);
134 }
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 SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
141 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
142 private final Set<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new HashSet<>();
143 private final XmppConnectionService mXmppConnectionService;
144 private Socket socket;
145 private XmlReader tagReader;
146 private TagWriter tagWriter = new TagWriter();
147 private boolean shouldAuthenticate = true;
148 private boolean inSmacksSession = false;
149 private boolean isBound = false;
150 private Element streamFeatures;
151 private String streamId = null;
152 private int smVersion = 3;
153 private int stanzasReceived = 0;
154 private int stanzasSent = 0;
155 private long lastPacketReceived = 0;
156 private long lastPingSent = 0;
157 private long lastConnect = 0;
158 private long lastSessionStarted = 0;
159 private long lastDiscoStarted = 0;
160 private AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
161 private AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
162 private AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
163 private AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
164 private boolean mInteractive = false;
165 private int attempt = 0;
166 private OnPresencePacketReceived presenceListener = null;
167 private OnJinglePacketReceived jingleListener = null;
168 private OnIqPacketReceived unregisteredIqListener = null;
169 private OnMessagePacketReceived messageListener = null;
170 private OnStatusChanged statusListener = null;
171 private OnBindListener bindListener = null;
172 private OnMessageAcknowledged acknowledgedListener = null;
173 private SaslMechanism saslMechanism;
174 private URL redirectionUrl = null;
175 private String verifiedHostname = null;
176 private volatile Thread mThread;
177 private CountDownLatch mStreamCountDownLatch;
178
179
180 public XmppConnection(final Account account, final XmppConnectionService service) {
181 this.account = account;
182 this.mXmppConnectionService = service;
183 }
184
185 private static void fixResource(Context context, Account account) {
186 String resource = account.getResource();
187 int fixedPartLength = context.getString(R.string.app_name).length() + 1; //include the trailing dot
188 int randomPartLength = 4; // 3 bytes
189 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
190 if (validBase64(resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
191 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
192 }
193 }
194 }
195
196 private static boolean validBase64(String input) {
197 try {
198 return Base64.decode(input, Base64.URL_SAFE).length == 3;
199 } catch (Throwable throwable) {
200 return false;
201 }
202 }
203
204 private void changeStatus(final Account.State nextStatus) {
205 synchronized (this) {
206 if (Thread.currentThread().isInterrupted()) {
207 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not changing status to " + nextStatus + " because thread was interrupted");
208 return;
209 }
210 if (account.getStatus() != nextStatus) {
211 if ((nextStatus == Account.State.OFFLINE)
212 && (account.getStatus() != Account.State.CONNECTING)
213 && (account.getStatus() != Account.State.ONLINE)
214 && (account.getStatus() != Account.State.DISABLED)) {
215 return;
216 }
217 if (nextStatus == Account.State.ONLINE) {
218 this.attempt = 0;
219 }
220 account.setStatus(nextStatus);
221 } else {
222 return;
223 }
224 }
225 if (statusListener != null) {
226 statusListener.onStatusChanged(account);
227 }
228 }
229
230 public void prepareNewConnection() {
231 this.lastConnect = SystemClock.elapsedRealtime();
232 this.lastPingSent = SystemClock.elapsedRealtime();
233 this.lastDiscoStarted = Long.MAX_VALUE;
234 this.mWaitingForSmCatchup.set(false);
235 this.changeStatus(Account.State.CONNECTING);
236 }
237
238 public boolean isWaitingForSmCatchup() {
239 return mWaitingForSmCatchup.get();
240 }
241
242 public void incrementSmCatchupMessageCounter() {
243 this.mSmCatchupMessageCounter.incrementAndGet();
244 }
245
246 protected void connect() {
247 if (mXmppConnectionService.areMessagesInitialized()) {
248 mXmppConnectionService.resetSendingToWaiting(account);
249 }
250 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
251 features.encryptionEnabled = false;
252 inSmacksSession = false;
253 isBound = false;
254 this.attempt++;
255 this.verifiedHostname = null; //will be set if user entered hostname is being used or hostname was verified with dnssec
256 try {
257 Socket localSocket;
258 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
259 this.changeStatus(Account.State.CONNECTING);
260 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
261 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
262 if (useTor) {
263 String destination;
264 if (account.getHostname().isEmpty()) {
265 destination = account.getServer();
266 } else {
267 destination = account.getHostname();
268 this.verifiedHostname = destination;
269 }
270 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": connect to " + destination + " via Tor");
271 localSocket = SocksSocketFactory.createSocketOverTor(destination, account.getPort());
272 try {
273 startXmpp(localSocket);
274 } catch (InterruptedException e) {
275 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
276 return;
277 } catch (Exception e) {
278 throw new IOException(e.getMessage());
279 }
280 } else {
281 final String domain = account.getJid().getDomain();
282 final List<Resolver.Result> results;
283 final boolean hardcoded = extended && !account.getHostname().isEmpty();
284 if (hardcoded) {
285 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
286 } else {
287 results = Resolver.resolve(domain);
288 }
289 if (Thread.currentThread().isInterrupted()) {
290 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
291 return;
292 }
293 if (results.size() == 0) {
294 Log.e(Config.LOGTAG,account.getJid().asBareJid()+": Resolver results were empty");
295 return;
296 }
297 final Resolver.Result storedBackupResult;
298 if (hardcoded) {
299 storedBackupResult = null;
300 } else {
301 storedBackupResult = mXmppConnectionService.databaseBackend.findResolverResult(domain);
302 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
303 results.add(storedBackupResult);
304 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": loaded backup resolver result from db: " + storedBackupResult);
305 }
306 }
307 for (Iterator<Resolver.Result> iterator = results.iterator(); iterator.hasNext(); ) {
308 final Resolver.Result result = iterator.next();
309 if (Thread.currentThread().isInterrupted()) {
310 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
311 return;
312 }
313 try {
314 // if tls is true, encryption is implied and must not be started
315 features.encryptionEnabled = result.isDirectTls();
316 verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
317 Log.d(Config.LOGTAG,"verified hostname "+verifiedHostname);
318 final InetSocketAddress addr;
319 if (result.getIp() != null) {
320 addr = new InetSocketAddress(result.getIp(), result.getPort());
321 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
322 + ": using values from resolver " + (result.getHostname() == null ? "" : result.getHostname().toString()
323 + "/") + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
324 } else {
325 addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort());
326 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
327 + ": using values from resolver "
328 + result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
329 }
330
331 if (!features.encryptionEnabled) {
332 localSocket = new Socket();
333 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
334 } else {
335 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
336 localSocket = tlsFactoryVerifier.factory.createSocket();
337
338 if (localSocket == null) {
339 throw new IOException("could not initialize ssl socket");
340 }
341
342 SSLSocketHelper.setSecurity((SSLSocket) localSocket);
343 SSLSocketHelper.setHostname((SSLSocket) localSocket, account.getServer());
344 SSLSocketHelper.setApplicationProtocol((SSLSocket) localSocket, "xmpp-client");
345
346 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
347
348 if (!tlsFactoryVerifier.verifier.verify(account.getServer(), verifiedHostname, ((SSLSocket) localSocket).getSession())) {
349 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
350 if (!iterator.hasNext()) {
351 throw new StateChangingException(Account.State.TLS_ERROR);
352 }
353 }
354 }
355 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
356 if (startXmpp(localSocket)) {
357 localSocket.setSoTimeout(0); //reset to 0; once the connection is established we don’t want this
358 if (!hardcoded && !result.equals(storedBackupResult)) {
359 mXmppConnectionService.databaseBackend.saveResolverResult(domain, result);
360 }
361 break; // successfully connected to server that speaks xmpp
362 } else {
363 localSocket.close();
364 if (!iterator.hasNext()) {
365 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
366 }
367 }
368 } catch (final StateChangingException e) {
369 throw e;
370 } catch (InterruptedException e) {
371 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
372 return;
373 } catch (final Throwable e) {
374 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
375 if (!iterator.hasNext()) {
376 throw new UnknownHostException();
377 }
378 }
379 }
380 }
381 processStream();
382 } catch (final SecurityException e) {
383 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
384 } catch (final StateChangingException e) {
385 this.changeStatus(e.state);
386 } catch (final UnknownHostException | ConnectException e) {
387 this.changeStatus(Account.State.SERVER_NOT_FOUND);
388 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
389 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
390 } catch (final IOException | XmlPullParserException e) {
391 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
392 this.changeStatus(Account.State.OFFLINE);
393 this.attempt = Math.max(0, this.attempt - 1);
394 } finally {
395 if (!Thread.currentThread().isInterrupted()) {
396 forceCloseSocket();
397 } else {
398 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not force closing socket because thread was interrupted");
399 }
400 }
401 }
402
403 /**
404 * Starts xmpp protocol, call after connecting to socket
405 *
406 * @return true if server returns with valid xmpp, false otherwise
407 */
408 private boolean startXmpp(Socket socket) throws Exception {
409 if (Thread.currentThread().isInterrupted()) {
410 throw new InterruptedException();
411 }
412 this.socket = socket;
413 tagReader = new XmlReader();
414 if (tagWriter != null) {
415 tagWriter.forceClose();
416 }
417 tagWriter = new TagWriter();
418 tagWriter.setOutputStream(socket.getOutputStream());
419 tagReader.setInputStream(socket.getInputStream());
420 tagWriter.beginDocument();
421 sendStartStream();
422 final Tag tag = tagReader.readTag();
423 if (Thread.currentThread().isInterrupted()) {
424 throw new InterruptedException();
425 }
426 if (socket instanceof SSLSocket) {
427 SSLSocketHelper.log(account, (SSLSocket) socket);
428 }
429 return tag != null && tag.isStart("stream");
430 }
431
432 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
433 final SSLContext sc = SSLSocketHelper.getSSLContext();
434 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
435 KeyManager[] keyManager;
436 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
437 keyManager = new KeyManager[]{new MyKeyManager()};
438 } else {
439 keyManager = null;
440 }
441 String domain = account.getJid().getDomain();
442 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
443 final SSLSocketFactory factory = sc.getSocketFactory();
444 final DomainHostnameVerifier verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier(), mInteractive);
445 return new TlsFactoryVerifier(factory, verifier);
446 }
447
448 @Override
449 public void run() {
450 synchronized (this) {
451 this.mThread = Thread.currentThread();
452 if (this.mThread.isInterrupted()) {
453 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": aborting connect because thread was interrupted");
454 return;
455 }
456 forceCloseSocket();
457 }
458 connect();
459 }
460
461 private void processStream() throws XmlPullParserException, IOException {
462 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
463 this.mStreamCountDownLatch = streamCountDownLatch;
464 Tag nextTag = tagReader.readTag();
465 while (nextTag != null && !nextTag.isEnd("stream")) {
466 if (nextTag.isStart("error")) {
467 processStreamError(nextTag);
468 } else if (nextTag.isStart("features")) {
469 processStreamFeatures(nextTag);
470 } else if (nextTag.isStart("proceed")) {
471 switchOverToTls();
472 } else if (nextTag.isStart("success")) {
473 final String challenge = tagReader.readElement(nextTag).getContent();
474 try {
475 saslMechanism.getResponse(challenge);
476 } catch (final SaslMechanism.AuthenticationException e) {
477 Log.e(Config.LOGTAG, String.valueOf(e));
478 throw new StateChangingException(Account.State.UNAUTHORIZED);
479 }
480 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": logged in");
481 account.setKey(Account.PINNED_MECHANISM_KEY,
482 String.valueOf(saslMechanism.getPriority()));
483 tagReader.reset();
484 sendStartStream();
485 final Tag tag = tagReader.readTag();
486 if (tag != null && tag.isStart("stream")) {
487 processStream();
488 } else {
489 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
490 }
491 break;
492 } else if (nextTag.isStart("failure")) {
493 final Element failure = tagReader.readElement(nextTag);
494 if (Namespace.SASL.equals(failure.getNamespace())) {
495 final String text = failure.findChildContent("text");
496 if (failure.hasChild("account-disabled") && text != null) {
497 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
498 if (matcher.find()) {
499 try {
500 URL url = new URL(text.substring(matcher.start(), matcher.end()));
501 if (url.getProtocol().equals("https")) {
502 this.redirectionUrl = url;
503 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
504 }
505 } catch (MalformedURLException e) {
506 throw new StateChangingException(Account.State.UNAUTHORIZED);
507 }
508 }
509 }
510 throw new StateChangingException(Account.State.UNAUTHORIZED);
511 } else if (Namespace.TLS.equals(failure.getNamespace())) {
512 throw new StateChangingException(Account.State.TLS_ERROR);
513 } else {
514 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
515 }
516 } else if (nextTag.isStart("challenge")) {
517 final String challenge = tagReader.readElement(nextTag).getContent();
518 final Element response = new Element("response", Namespace.SASL);
519 try {
520 response.setContent(saslMechanism.getResponse(challenge));
521 } catch (final SaslMechanism.AuthenticationException e) {
522 // TODO: Send auth abort tag.
523 Log.e(Config.LOGTAG, e.toString());
524 }
525 tagWriter.writeElement(response);
526 } else if (nextTag.isStart("enabled")) {
527 final Element enabled = tagReader.readElement(nextTag);
528 if ("true".equals(enabled.getAttribute("resume"))) {
529 this.streamId = enabled.getAttribute("id");
530 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
531 + ": stream management(" + smVersion
532 + ") enabled (resumable)");
533 } else {
534 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
535 + ": stream management(" + smVersion + ") enabled");
536 }
537 this.stanzasReceived = 0;
538 this.inSmacksSession = true;
539 final RequestPacket r = new RequestPacket(smVersion);
540 tagWriter.writeStanzaAsync(r);
541 } else if (nextTag.isStart("resumed")) {
542 this.inSmacksSession = true;
543 this.isBound = true;
544 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
545 lastPacketReceived = SystemClock.elapsedRealtime();
546 final Element resumed = tagReader.readElement(nextTag);
547 final String h = resumed.getAttribute("h");
548 try {
549 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
550 final boolean acknowledgedMessages;
551 synchronized (this.mStanzaQueue) {
552 final int serverCount = Integer.parseInt(h);
553 if (serverCount < stanzasSent) {
554 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
555 + ": session resumed with lost packages");
556 stanzasSent = serverCount;
557 } else {
558 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed");
559 }
560 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
561 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
562 failedStanzas.add(mStanzaQueue.valueAt(i));
563 }
564 mStanzaQueue.clear();
565 }
566 if (acknowledgedMessages) {
567 mXmppConnectionService.updateConversationUi();
568 }
569 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
570 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
571 if (packet instanceof MessagePacket) {
572 MessagePacket message = (MessagePacket) packet;
573 mXmppConnectionService.markMessage(account,
574 message.getTo().asBareJid(),
575 message.getId(),
576 Message.STATUS_UNSEND);
577 }
578 sendPacket(packet);
579 }
580 } catch (final NumberFormatException ignored) {
581 }
582 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
583 changeStatus(Account.State.ONLINE);
584 } else if (nextTag.isStart("r")) {
585 tagReader.readElement(nextTag);
586 if (Config.EXTENDED_SM_LOGGING) {
587 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
588 }
589 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
590 tagWriter.writeStanzaAsync(ack);
591 } else if (nextTag.isStart("a")) {
592 boolean accountUiNeedsRefresh = false;
593 synchronized (NotificationService.CATCHUP_LOCK) {
594 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
595 int count = mSmCatchupMessageCounter.get();
596 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": SM catchup complete (" + count + ")");
597 accountUiNeedsRefresh = true;
598 if (count > 0) {
599 mXmppConnectionService.getNotificationService().finishBacklog(true, account);
600 }
601 }
602 }
603 if (accountUiNeedsRefresh) {
604 mXmppConnectionService.updateAccountUi();
605 }
606 final Element ack = tagReader.readElement(nextTag);
607 lastPacketReceived = SystemClock.elapsedRealtime();
608 try {
609 final boolean acknowledgedMessages;
610 synchronized (this.mStanzaQueue) {
611 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
612 acknowledgedMessages = acknowledgeStanzaUpTo(serverSequence);
613 }
614 if (acknowledgedMessages) {
615 mXmppConnectionService.updateConversationUi();
616 }
617 } catch (NumberFormatException | NullPointerException e) {
618 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server send ack without sequence number");
619 }
620 } else if (nextTag.isStart("failed")) {
621 Element failed = tagReader.readElement(nextTag);
622 try {
623 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
624 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed but server acknowledged stanza #" + serverCount);
625 final boolean acknowledgedMessages;
626 synchronized (this.mStanzaQueue) {
627 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
628 }
629 if (acknowledgedMessages) {
630 mXmppConnectionService.updateConversationUi();
631 }
632 } catch (NumberFormatException | NullPointerException e) {
633 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
634 }
635 resetStreamId();
636 sendBindRequest();
637 } else if (nextTag.isStart("iq")) {
638 processIq(nextTag);
639 } else if (nextTag.isStart("message")) {
640 processMessage(nextTag);
641 } else if (nextTag.isStart("presence")) {
642 processPresence(nextTag);
643 }
644 nextTag = tagReader.readTag();
645 }
646 if (nextTag != null && nextTag.isEnd("stream")) {
647 streamCountDownLatch.countDown();
648 }
649 }
650
651 private boolean acknowledgeStanzaUpTo(int serverCount) {
652 if (serverCount > stanzasSent) {
653 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
654 }
655 boolean acknowledgedMessages = false;
656 for (int i = 0; i < mStanzaQueue.size(); ++i) {
657 if (serverCount >= mStanzaQueue.keyAt(i)) {
658 if (Config.EXTENDED_SM_LOGGING) {
659 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
660 }
661 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
662 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
663 MessagePacket packet = (MessagePacket) stanza;
664 acknowledgedMessages |= acknowledgedListener.onMessageAcknowledged(account, packet.getId());
665 }
666 mStanzaQueue.removeAt(i);
667 i--;
668 }
669 }
670 return acknowledgedMessages;
671 }
672
673 private @NonNull
674 Element processPacket(final Tag currentTag, final int packetType) throws XmlPullParserException, IOException {
675 Element element;
676 switch (packetType) {
677 case PACKET_IQ:
678 element = new IqPacket();
679 break;
680 case PACKET_MESSAGE:
681 element = new MessagePacket();
682 break;
683 case PACKET_PRESENCE:
684 element = new PresencePacket();
685 break;
686 default:
687 throw new AssertionError("Should never encounter invalid type");
688 }
689 element.setAttributes(currentTag.getAttributes());
690 Tag nextTag = tagReader.readTag();
691 if (nextTag == null) {
692 throw new IOException("interrupted mid tag");
693 }
694 while (!nextTag.isEnd(element.getName())) {
695 if (!nextTag.isNo()) {
696 final Element child = tagReader.readElement(nextTag);
697 final String type = currentTag.getAttribute("type");
698 if (packetType == PACKET_IQ
699 && "jingle".equals(child.getName())
700 && ("set".equalsIgnoreCase(type) || "get"
701 .equalsIgnoreCase(type))) {
702 element = new JinglePacket();
703 element.setAttributes(currentTag.getAttributes());
704 }
705 element.addChild(child);
706 }
707 nextTag = tagReader.readTag();
708 if (nextTag == null) {
709 throw new IOException("interrupted mid tag");
710 }
711 }
712 if (stanzasReceived == Integer.MAX_VALUE) {
713 resetStreamId();
714 throw new IOException("time to restart the session. cant handle >2 billion pcks");
715 }
716 if (inSmacksSession) {
717 ++stanzasReceived;
718 } else if (features.sm()) {
719 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
720 }
721 lastPacketReceived = SystemClock.elapsedRealtime();
722 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
723 Log.d(Config.LOGTAG, "[background stanza] " + element);
724 }
725 return element;
726 }
727
728 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
729 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
730 if (!packet.valid()) {
731 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
732 return;
733 }
734 if (packet instanceof JinglePacket) {
735 if (this.jingleListener != null) {
736 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
737 }
738 } else {
739 OnIqPacketReceived callback = null;
740 synchronized (this.packetCallbacks) {
741 if (packetCallbacks.containsKey(packet.getId())) {
742 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
743 // Packets to the server should have responses from the server
744 if (packetCallbackDuple.first.toServer(account)) {
745 if (packet.fromServer(account)) {
746 callback = packetCallbackDuple.second;
747 packetCallbacks.remove(packet.getId());
748 } else {
749 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
750 }
751 } else {
752 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
753 callback = packetCallbackDuple.second;
754 packetCallbacks.remove(packet.getId());
755 } else {
756 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
757 }
758 }
759 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
760 callback = this.unregisteredIqListener;
761 }
762 }
763 if (callback != null) {
764 try {
765 callback.onIqPacketReceived(account, packet);
766 } catch (StateChangingError error) {
767 throw new StateChangingException(error.state);
768 }
769 }
770 }
771 }
772
773 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
774 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
775 if (!packet.valid()) {
776 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
777 return;
778 }
779 this.messageListener.onMessagePacketReceived(account, packet);
780 }
781
782 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
783 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
784 if (!packet.valid()) {
785 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
786 return;
787 }
788 this.presenceListener.onPresencePacketReceived(account, packet);
789 }
790
791 private void sendStartTLS() throws IOException {
792 final Tag startTLS = Tag.empty("starttls");
793 startTLS.setAttribute("xmlns", Namespace.TLS);
794 tagWriter.writeTag(startTLS);
795 }
796
797 private void switchOverToTls() throws XmlPullParserException, IOException {
798 tagReader.readTag();
799 try {
800 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
801 final InetAddress address = socket == null ? null : socket.getInetAddress();
802
803 if (address == null) {
804 throw new IOException("could not setup ssl");
805 }
806
807 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
808
809
810 if (sslSocket == null) {
811 throw new IOException("could not initialize ssl socket");
812 }
813
814 SSLSocketHelper.setSecurity(sslSocket);
815 SSLSocketHelper.setHostname(sslSocket, account.getServer());
816 SSLSocketHelper.setApplicationProtocol(sslSocket, "xmpp-client");
817
818 if (!tlsFactoryVerifier.verifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
819 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
820 throw new StateChangingException(Account.State.TLS_ERROR);
821 }
822 tagReader.setInputStream(sslSocket.getInputStream());
823 tagWriter.setOutputStream(sslSocket.getOutputStream());
824 sendStartStream();
825 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
826 features.encryptionEnabled = true;
827 final Tag tag = tagReader.readTag();
828 if (tag != null && tag.isStart("stream")) {
829 SSLSocketHelper.log(account, sslSocket);
830 processStream();
831 } else {
832 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
833 }
834 sslSocket.close();
835 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
836 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
837 throw new StateChangingException(Account.State.TLS_ERROR);
838 }
839 }
840
841 private void processStreamFeatures(final Tag currentTag) throws XmlPullParserException, IOException {
842 this.streamFeatures = tagReader.readElement(currentTag);
843 final boolean isSecure = features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS;
844 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
845 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
846 sendStartTLS();
847 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
848 if (isSecure) {
849 sendRegistryRequest();
850 } else {
851 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
852 }
853 } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
854 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
855 } else if (this.streamFeatures.hasChild("mechanisms") && shouldAuthenticate && isSecure) {
856 authenticate();
857 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
858 if (Config.EXTENDED_SM_LOGGING) {
859 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resuming after stanza #" + stanzasReceived);
860 }
861 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
862 this.mSmCatchupMessageCounter.set(0);
863 this.mWaitingForSmCatchup.set(true);
864 this.tagWriter.writeStanzaAsync(resume);
865 } else if (needsBinding) {
866 if (this.streamFeatures.hasChild("bind") && isSecure) {
867 sendBindRequest();
868 } else {
869 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
870 }
871 }
872 }
873
874 private void authenticate() throws IOException {
875 final List<String> mechanisms = extractMechanisms(streamFeatures
876 .findChild("mechanisms"));
877 final Element auth = new Element("auth", Namespace.SASL);
878 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
879 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
880 } else if (mechanisms.contains("SCRAM-SHA-256")) {
881 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
882 } else if (mechanisms.contains("SCRAM-SHA-1")) {
883 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
884 } else if (mechanisms.contains("PLAIN") && !account.getJid().getDomain().equals("nimbuzz.com")) {
885 saslMechanism = new Plain(tagWriter, account);
886 } else if (mechanisms.contains("DIGEST-MD5")) {
887 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
888 } else if (mechanisms.contains("ANONYMOUS")) {
889 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
890 }
891 if (saslMechanism != null) {
892 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
893 if (pinnedMechanism > saslMechanism.getPriority()) {
894 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
895 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
896 ") than pinned priority (" + pinnedMechanism +
897 "). Possible downgrade attack?");
898 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
899 }
900 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
901 auth.setAttribute("mechanism", saslMechanism.getMechanism());
902 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
903 auth.setContent(saslMechanism.getClientFirstMessage());
904 }
905 tagWriter.writeElement(auth);
906 } else {
907 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
908 }
909 }
910
911 private List<String> extractMechanisms(final Element stream) {
912 final ArrayList<String> mechanisms = new ArrayList<>(stream
913 .getChildren().size());
914 for (final Element child : stream.getChildren()) {
915 mechanisms.add(child.getContent());
916 }
917 return mechanisms;
918 }
919
920 private void sendRegistryRequest() {
921 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
922 register.query("jabber:iq:register");
923 register.setTo(Jid.of(account.getServer()));
924 sendUnmodifiedIqPacket(register, (account, packet) -> {
925 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
926 return;
927 }
928 if (packet.getType() == IqPacket.TYPE.ERROR) {
929 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
930 }
931 final Element query = packet.query("jabber:iq:register");
932 if (query.hasChild("username") && (query.hasChild("password"))) {
933 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
934 final Element username = new Element("username").setContent(account.getUsername());
935 final Element password = new Element("password").setContent(account.getPassword());
936 register1.query("jabber:iq:register").addChild(username);
937 register1.query().addChild(password);
938 register1.setFrom(account.getJid().asBareJid());
939 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
940 } else if (query.hasChild("x", Namespace.DATA)) {
941 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
942 final Element blob = query.findChild("data", "urn:xmpp:bob");
943 final String id = packet.getId();
944 InputStream is;
945 if (blob != null) {
946 try {
947 final String base64Blob = blob.getContent();
948 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
949 is = new ByteArrayInputStream(strBlob);
950 } catch (Exception e) {
951 is = null;
952 }
953 } else {
954 try {
955 Field field = data.getFieldByName("url");
956 URL url = field != null && field.getValue() != null ? new URL(field.getValue()) : null;
957 is = url != null ? url.openStream() : null;
958 } catch (IOException e) {
959 is = null;
960 }
961 }
962
963 if (is != null) {
964 Bitmap captcha = BitmapFactory.decodeStream(is);
965 try {
966 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
967 return;
968 }
969 } catch (Exception e) {
970 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
971 }
972 }
973 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
974 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
975 final String instructions = query.findChildContent("instructions");
976 final Element oob = query.findChild("x", Namespace.OOB);
977 final String url = oob == null ? null : oob.findChildContent("url");
978 if (url != null) {
979 setAccountCreationFailed(url);
980 } else if (instructions != null) {
981 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
982 if (matcher.find()) {
983 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
984 }
985 }
986 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
987 }
988 }, true);
989 }
990
991 private void setAccountCreationFailed(String url) {
992 if (url != null) {
993 try {
994 this.redirectionUrl = new URL(url);
995 if (this.redirectionUrl.getProtocol().equals("https")) {
996 throw new StateChangingError(Account.State.REGISTRATION_WEB);
997 }
998 } catch (MalformedURLException e) {
999 //fall through
1000 }
1001 }
1002 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1003 }
1004
1005 public URL getRedirectionUrl() {
1006 return this.redirectionUrl;
1007 }
1008
1009 public void resetEverything() {
1010 resetAttemptCount(true);
1011 resetStreamId();
1012 clearIqCallbacks();
1013 this.stanzasSent = 0;
1014 mStanzaQueue.clear();
1015 this.redirectionUrl = null;
1016 synchronized (this.disco) {
1017 disco.clear();
1018 }
1019 }
1020
1021 private void sendBindRequest() {
1022 try {
1023 mXmppConnectionService.restoredFromDatabaseLatch.await();
1024 } catch (InterruptedException e) {
1025 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1026 return;
1027 }
1028 clearIqCallbacks();
1029 if (account.getJid().isBareJid()) {
1030 account.setResource(this.createNewResource());
1031 } else {
1032 fixResource(mXmppConnectionService, account);
1033 }
1034 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1035 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1036 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1037 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1038 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1039 return;
1040 }
1041 final Element bind = packet.findChild("bind");
1042 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1043 isBound = true;
1044 final Element jid = bind.findChild("jid");
1045 if (jid != null && jid.getContent() != null) {
1046 try {
1047 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1048 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1049 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1050 throw new StateChangingError(Account.State.BIND_FAILURE);
1051 }
1052 if (account.setJid(assignedJid)) {
1053 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1054 mXmppConnectionService.databaseBackend.updateAccount(account);
1055 }
1056 if (streamFeatures.hasChild("session")
1057 && !streamFeatures.findChild("session").hasChild("optional")) {
1058 sendStartSession();
1059 } else {
1060 sendPostBindInitialization();
1061 }
1062 return;
1063 } catch (final IllegalArgumentException e) {
1064 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1065 }
1066 } else {
1067 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1068 }
1069 } else {
1070 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
1071 }
1072 final Element error = packet.findChild("error");
1073 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1074 account.setResource(createNewResource());
1075 }
1076 throw new StateChangingError(Account.State.BIND_FAILURE);
1077 }, true);
1078 }
1079
1080 private void clearIqCallbacks() {
1081 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1082 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1083 synchronized (this.packetCallbacks) {
1084 if (this.packetCallbacks.size() == 0) {
1085 return;
1086 }
1087 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1088 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1089 while (iterator.hasNext()) {
1090 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1091 callbacks.add(entry.second);
1092 iterator.remove();
1093 }
1094 }
1095 for (OnIqPacketReceived callback : callbacks) {
1096 try {
1097 callback.onIqPacketReceived(account, failurePacket);
1098 } catch (StateChangingError error) {
1099 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1100 //ignore
1101 }
1102 }
1103 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1104 }
1105
1106 public void sendDiscoTimeout() {
1107 if (mWaitForDisco.compareAndSet(true, false)) {
1108 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1109 finalizeBind();
1110 }
1111 }
1112
1113 private void sendStartSession() {
1114 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1115 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1116 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1117 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1118 if (packet.getType() == IqPacket.TYPE.RESULT) {
1119 sendPostBindInitialization();
1120 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1121 throw new StateChangingError(Account.State.SESSION_FAILURE);
1122 }
1123 }, true);
1124 }
1125
1126 private void sendPostBindInitialization() {
1127 smVersion = 0;
1128 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1129 smVersion = 3;
1130 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1131 smVersion = 2;
1132 }
1133 if (smVersion != 0) {
1134 synchronized (this.mStanzaQueue) {
1135 final EnablePacket enable = new EnablePacket(smVersion);
1136 tagWriter.writeStanzaAsync(enable);
1137 stanzasSent = 0;
1138 mStanzaQueue.clear();
1139 }
1140 }
1141 features.carbonsEnabled = false;
1142 features.blockListRequested = false;
1143 synchronized (this.disco) {
1144 this.disco.clear();
1145 }
1146 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1147 mPendingServiceDiscoveries.set(0);
1148 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain())) {
1149 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1150 mWaitForDisco.set(false);
1151 } else {
1152 mWaitForDisco.set(true);
1153 }
1154 lastDiscoStarted = SystemClock.elapsedRealtime();
1155 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1156 Element caps = streamFeatures.findChild("c");
1157 final String hash = caps == null ? null : caps.getAttribute("hash");
1158 final String ver = caps == null ? null : caps.getAttribute("ver");
1159 ServiceDiscoveryResult discoveryResult = null;
1160 if (hash != null && ver != null) {
1161 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1162 }
1163 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1164 if (requestDiscoItemsFirst) {
1165 sendServiceDiscoveryItems(Jid.of(account.getServer()));
1166 }
1167 if (discoveryResult == null) {
1168 sendServiceDiscoveryInfo(Jid.of(account.getServer()));
1169 } else {
1170 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1171 disco.put(Jid.of(account.getServer()), discoveryResult);
1172 }
1173 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1174 if (!requestDiscoItemsFirst) {
1175 sendServiceDiscoveryItems(Jid.of(account.getServer()));
1176 }
1177
1178 if (!mWaitForDisco.get()) {
1179 finalizeBind();
1180 }
1181 this.lastSessionStarted = SystemClock.elapsedRealtime();
1182 }
1183
1184 private void sendServiceDiscoveryInfo(final Jid jid) {
1185 mPendingServiceDiscoveries.incrementAndGet();
1186 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1187 iq.setTo(jid);
1188 iq.query("http://jabber.org/protocol/disco#info");
1189 this.sendIqPacket(iq, (account, packet) -> {
1190 if (packet.getType() == IqPacket.TYPE.RESULT) {
1191 boolean advancedStreamFeaturesLoaded;
1192 synchronized (XmppConnection.this.disco) {
1193 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1194 if (jid.equals(Jid.of(account.getServer()))) {
1195 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1196 }
1197 disco.put(jid, result);
1198 advancedStreamFeaturesLoaded = disco.containsKey(Jid.of(account.getServer()))
1199 && disco.containsKey(account.getJid().asBareJid());
1200 }
1201 if (advancedStreamFeaturesLoaded && (jid.equals(Jid.of(account.getServer())) || jid.equals(account.getJid().asBareJid()))) {
1202 enableAdvancedStreamFeatures();
1203 }
1204 } else {
1205 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1206 }
1207 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1208 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1209 && mWaitForDisco.compareAndSet(true, false)) {
1210 finalizeBind();
1211 }
1212 }
1213 });
1214 }
1215
1216 private void finalizeBind() {
1217 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1218 if (bindListener != null) {
1219 bindListener.onBind(account);
1220 }
1221 changeStatus(Account.State.ONLINE);
1222 }
1223
1224 private void enableAdvancedStreamFeatures() {
1225 if (getFeatures().carbons() && !features.carbonsEnabled) {
1226 sendEnableCarbons();
1227 }
1228 if (getFeatures().blocking() && !features.blockListRequested) {
1229 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1230 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1231 }
1232 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1233 listener.onAdvancedStreamFeaturesAvailable(account);
1234 }
1235 }
1236
1237 private void sendServiceDiscoveryItems(final Jid server) {
1238 mPendingServiceDiscoveries.incrementAndGet();
1239 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1240 iq.setTo(Jid.ofDomain(server.getDomain()));
1241 iq.query("http://jabber.org/protocol/disco#items");
1242 this.sendIqPacket(iq, (account, packet) -> {
1243 if (packet.getType() == IqPacket.TYPE.RESULT) {
1244 HashSet<Jid> items = new HashSet<Jid>();
1245 final List<Element> elements = packet.query().getChildren();
1246 for (final Element element : elements) {
1247 if (element.getName().equals("item")) {
1248 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1249 if (jid != null && !jid.equals(Jid.of(account.getServer()))) {
1250 items.add(jid);
1251 }
1252 }
1253 }
1254 for (Jid jid : items) {
1255 sendServiceDiscoveryInfo(jid);
1256 }
1257 } else {
1258 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1259 }
1260 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1261 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1262 && mWaitForDisco.compareAndSet(true, false)) {
1263 finalizeBind();
1264 }
1265 }
1266 });
1267 }
1268
1269 private void sendEnableCarbons() {
1270 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1271 iq.addChild("enable", "urn:xmpp:carbons:2");
1272 this.sendIqPacket(iq, new OnIqPacketReceived() {
1273
1274 @Override
1275 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1276 if (!packet.hasChild("error")) {
1277 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1278 + ": successfully enabled carbons");
1279 features.carbonsEnabled = true;
1280 } else {
1281 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1282 + ": error enableing carbons " + packet.toString());
1283 }
1284 }
1285 });
1286 }
1287
1288 private void processStreamError(final Tag currentTag) throws XmlPullParserException, IOException {
1289 final Element streamError = tagReader.readElement(currentTag);
1290 if (streamError == null) {
1291 return;
1292 }
1293 if (streamError.hasChild("conflict")) {
1294 account.setResource(createNewResource());
1295 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1296 throw new IOException();
1297 } else if (streamError.hasChild("host-unknown")) {
1298 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1299 } else if (streamError.hasChild("policy-violation")) {
1300 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1301 } else {
1302 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError.toString());
1303 throw new StateChangingException(Account.State.STREAM_ERROR);
1304 }
1305 }
1306
1307 private void sendStartStream() throws IOException {
1308 final Tag stream = Tag.start("stream:stream");
1309 stream.setAttribute("to", account.getServer());
1310 stream.setAttribute("version", "1.0");
1311 stream.setAttribute("xml:lang", "en");
1312 stream.setAttribute("xmlns", "jabber:client");
1313 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1314 tagWriter.writeTag(stream);
1315 }
1316
1317 private String createNewResource() {
1318 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1319 }
1320
1321 private String nextRandomId() {
1322 return nextRandomId(false);
1323 }
1324
1325 private String nextRandomId(boolean s) {
1326 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1327 }
1328
1329 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1330 packet.setFrom(account.getJid());
1331 return this.sendUnmodifiedIqPacket(packet, callback, false);
1332 }
1333
1334 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1335 if (packet.getId() == null) {
1336 packet.setAttribute("id", nextRandomId());
1337 }
1338 if (callback != null) {
1339 synchronized (this.packetCallbacks) {
1340 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1341 }
1342 }
1343 this.sendPacket(packet, force);
1344 return packet.getId();
1345 }
1346
1347 public void sendMessagePacket(final MessagePacket packet) {
1348 this.sendPacket(packet);
1349 }
1350
1351 public void sendPresencePacket(final PresencePacket packet) {
1352 this.sendPacket(packet);
1353 }
1354
1355 private synchronized void sendPacket(final AbstractStanza packet) {
1356 sendPacket(packet, false);
1357 }
1358
1359 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1360 if (stanzasSent == Integer.MAX_VALUE) {
1361 resetStreamId();
1362 disconnect(true);
1363 return;
1364 }
1365 synchronized (this.mStanzaQueue) {
1366 if (force || isBound) {
1367 tagWriter.writeStanzaAsync(packet);
1368 } else {
1369 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1370 }
1371 if (packet instanceof AbstractAcknowledgeableStanza) {
1372 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1373
1374 if (this.mStanzaQueue.size() != 0) {
1375 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1376 if (currentHighestKey != stanzasSent) {
1377 throw new AssertionError("Stanza count messed up");
1378 }
1379 }
1380
1381 ++stanzasSent;
1382 this.mStanzaQueue.append(stanzasSent, stanza);
1383 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1384 if (Config.EXTENDED_SM_LOGGING) {
1385 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1386 }
1387 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1388 }
1389 }
1390 }
1391 }
1392
1393 public void sendPing() {
1394 if (!r()) {
1395 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1396 iq.setFrom(account.getJid());
1397 iq.addChild("ping", "urn:xmpp:ping");
1398 this.sendIqPacket(iq, null);
1399 }
1400 this.lastPingSent = SystemClock.elapsedRealtime();
1401 }
1402
1403 public void setOnMessagePacketReceivedListener(
1404 final OnMessagePacketReceived listener) {
1405 this.messageListener = listener;
1406 }
1407
1408 public void setOnUnregisteredIqPacketReceivedListener(
1409 final OnIqPacketReceived listener) {
1410 this.unregisteredIqListener = listener;
1411 }
1412
1413 public void setOnPresencePacketReceivedListener(
1414 final OnPresencePacketReceived listener) {
1415 this.presenceListener = listener;
1416 }
1417
1418 public void setOnJinglePacketReceivedListener(
1419 final OnJinglePacketReceived listener) {
1420 this.jingleListener = listener;
1421 }
1422
1423 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1424 this.statusListener = listener;
1425 }
1426
1427 public void setOnBindListener(final OnBindListener listener) {
1428 this.bindListener = listener;
1429 }
1430
1431 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1432 this.acknowledgedListener = listener;
1433 }
1434
1435 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1436 this.advancedStreamFeaturesLoadedListeners.add(listener);
1437 }
1438
1439 private void forceCloseSocket() {
1440 if (socket != null) {
1441 try {
1442 socket.close();
1443 } catch (IOException e) {
1444 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception " + e.getMessage() + " during force close");
1445 }
1446 } else {
1447 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": socket was null during force close");
1448 }
1449 }
1450
1451 public void interrupt() {
1452 if (this.mThread != null) {
1453 this.mThread.interrupt();
1454 }
1455 }
1456
1457 public void disconnect(final boolean force) {
1458 interrupt();
1459 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + Boolean.toString(force));
1460 if (force) {
1461 forceCloseSocket();
1462 } else {
1463 final TagWriter currentTagWriter = this.tagWriter;
1464 if (currentTagWriter.isActive()) {
1465 currentTagWriter.finish();
1466 final Socket currentSocket = this.socket;
1467 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1468 try {
1469 currentTagWriter.await(1, TimeUnit.SECONDS);
1470 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1471 currentTagWriter.writeTag(Tag.end("stream:stream"));
1472 if (streamCountDownLatch != null) {
1473 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1474 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1475 } else {
1476 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1477 }
1478 }
1479 } catch (InterruptedException e) {
1480 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1481 } catch (final IOException e) {
1482 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1483 } finally {
1484 FileBackend.close(currentSocket);
1485 }
1486 } else {
1487 forceCloseSocket();
1488 }
1489 }
1490 }
1491
1492 private void resetStreamId() {
1493 this.streamId = null;
1494 }
1495
1496 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1497 synchronized (this.disco) {
1498 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1499 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1500 if (cursor.getValue().getFeatures().contains(feature)) {
1501 items.add(cursor);
1502 }
1503 }
1504 return items;
1505 }
1506 }
1507
1508 public Jid findDiscoItemByFeature(final String feature) {
1509 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1510 if (items.size() >= 1) {
1511 return items.get(0).getKey();
1512 }
1513 return null;
1514 }
1515
1516 public boolean r() {
1517 if (getFeatures().sm()) {
1518 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1519 return true;
1520 } else {
1521 return false;
1522 }
1523 }
1524
1525 public List<String> getMucServersWithholdAccount() {
1526 List<String> servers = getMucServers();
1527 servers.remove(account.getServer());
1528 return servers;
1529 }
1530
1531 public List<String> getMucServers() {
1532 List<String> servers = new ArrayList<>();
1533 synchronized (this.disco) {
1534 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1535 final ServiceDiscoveryResult value = cursor.getValue();
1536 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1537 && value.hasIdentity("conference", "text")
1538 && !value.getFeatures().contains("jabber:iq:gateway")
1539 && !value.hasIdentity("conference", "irc")) {
1540 servers.add(cursor.getKey().toString());
1541 }
1542 }
1543 }
1544 return servers;
1545 }
1546
1547 public String getMucServer() {
1548 List<String> servers = getMucServers();
1549 return servers.size() > 0 ? servers.get(0) : null;
1550 }
1551
1552 public int getTimeToNextAttempt() {
1553 final int interval = Math.min((int) (25 * Math.pow(1.3, attempt)), 300);
1554 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1555 return interval - secondsSinceLast;
1556 }
1557
1558 public int getAttempt() {
1559 return this.attempt;
1560 }
1561
1562 public Features getFeatures() {
1563 return this.features;
1564 }
1565
1566 public long getLastSessionEstablished() {
1567 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1568 return System.currentTimeMillis() - diff;
1569 }
1570
1571 public long getLastConnect() {
1572 return this.lastConnect;
1573 }
1574
1575 public long getLastPingSent() {
1576 return this.lastPingSent;
1577 }
1578
1579 public long getLastDiscoStarted() {
1580 return this.lastDiscoStarted;
1581 }
1582
1583 public long getLastPacketReceived() {
1584 return this.lastPacketReceived;
1585 }
1586
1587 public void sendActive() {
1588 this.sendPacket(new ActivePacket());
1589 }
1590
1591 public void sendInactive() {
1592 this.sendPacket(new InactivePacket());
1593 }
1594
1595 public void resetAttemptCount(boolean resetConnectTime) {
1596 this.attempt = 0;
1597 if (resetConnectTime) {
1598 this.lastConnect = 0;
1599 }
1600 }
1601
1602 public void setInteractive(boolean interactive) {
1603 this.mInteractive = interactive;
1604 }
1605
1606 public Identity getServerIdentity() {
1607 synchronized (this.disco) {
1608 ServiceDiscoveryResult result = disco.get(Jid.ofDomain(account.getJid().getDomain()));
1609 if (result == null) {
1610 return Identity.UNKNOWN;
1611 }
1612 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1613 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1614 switch (id.getName()) {
1615 case "Prosody":
1616 return Identity.PROSODY;
1617 case "ejabberd":
1618 return Identity.EJABBERD;
1619 case "Slack-XMPP":
1620 return Identity.SLACK;
1621 }
1622 }
1623 }
1624 }
1625 return Identity.UNKNOWN;
1626 }
1627
1628 private IqGenerator getIqGenerator() {
1629 return mXmppConnectionService.getIqGenerator();
1630 }
1631
1632 public enum Identity {
1633 FACEBOOK,
1634 SLACK,
1635 EJABBERD,
1636 PROSODY,
1637 NIMBUZZ,
1638 UNKNOWN
1639 }
1640
1641 private static class TlsFactoryVerifier {
1642 private final SSLSocketFactory factory;
1643 private final DomainHostnameVerifier verifier;
1644
1645 TlsFactoryVerifier(final SSLSocketFactory factory, final DomainHostnameVerifier verifier) throws IOException {
1646 this.factory = factory;
1647 this.verifier = verifier;
1648 if (factory == null || verifier == null) {
1649 throw new IOException("could not setup ssl");
1650 }
1651 }
1652 }
1653
1654 private class MyKeyManager implements X509KeyManager {
1655 @Override
1656 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1657 return account.getPrivateKeyAlias();
1658 }
1659
1660 @Override
1661 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1662 return null;
1663 }
1664
1665 @Override
1666 public X509Certificate[] getCertificateChain(String alias) {
1667 Log.d(Config.LOGTAG, "getting certificate chain");
1668 try {
1669 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1670 } catch (Exception e) {
1671 Log.d(Config.LOGTAG, e.getMessage());
1672 return new X509Certificate[0];
1673 }
1674 }
1675
1676 @Override
1677 public String[] getClientAliases(String s, Principal[] principals) {
1678 final String alias = account.getPrivateKeyAlias();
1679 return alias != null ? new String[]{alias} : new String[0];
1680 }
1681
1682 @Override
1683 public String[] getServerAliases(String s, Principal[] principals) {
1684 return new String[0];
1685 }
1686
1687 @Override
1688 public PrivateKey getPrivateKey(String alias) {
1689 try {
1690 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1691 } catch (Exception e) {
1692 return null;
1693 }
1694 }
1695 }
1696
1697 private class StateChangingError extends Error {
1698 private final Account.State state;
1699
1700 public StateChangingError(Account.State state) {
1701 this.state = state;
1702 }
1703 }
1704
1705 private class StateChangingException extends IOException {
1706 private final Account.State state;
1707
1708 public StateChangingException(Account.State state) {
1709 this.state = state;
1710 }
1711 }
1712
1713 public class Features {
1714 XmppConnection connection;
1715 private boolean carbonsEnabled = false;
1716 private boolean encryptionEnabled = false;
1717 private boolean blockListRequested = false;
1718
1719 public Features(final XmppConnection connection) {
1720 this.connection = connection;
1721 }
1722
1723 private boolean hasDiscoFeature(final Jid server, final String feature) {
1724 synchronized (XmppConnection.this.disco) {
1725 return connection.disco.containsKey(server) &&
1726 connection.disco.get(server).getFeatures().contains(feature);
1727 }
1728 }
1729
1730 public boolean carbons() {
1731 return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:carbons:2");
1732 }
1733
1734 public boolean bookmarksConversion() {
1735 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1736 }
1737
1738 public boolean blocking() {
1739 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.BLOCKING);
1740 }
1741
1742 public boolean spamReporting() {
1743 return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:reporting:reason:spam:0");
1744 }
1745
1746 public boolean flexibleOfflineMessageRetrieval() {
1747 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
1748 }
1749
1750 public boolean register() {
1751 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.REGISTER);
1752 }
1753
1754 public boolean sm() {
1755 return streamId != null
1756 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1757 }
1758
1759 public boolean csi() {
1760 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1761 }
1762
1763 public boolean pep() {
1764 synchronized (XmppConnection.this.disco) {
1765 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1766 return info != null && info.hasIdentity("pubsub", "pep");
1767 }
1768 }
1769
1770 public boolean pepPersistent() {
1771 synchronized (XmppConnection.this.disco) {
1772 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1773 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1774 }
1775 }
1776
1777 public boolean pepPublishOptions() {
1778 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
1779 }
1780
1781 public boolean pepOmemoWhitelisted() {
1782 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
1783 }
1784
1785 public boolean mam() {
1786 return MessageArchiveService.Version.has(getAccountFeatures());
1787 }
1788
1789 public List<String> getAccountFeatures() {
1790 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
1791 return result == null ? Collections.emptyList() : result.getFeatures();
1792 }
1793
1794 public boolean push() {
1795 return hasDiscoFeature(account.getJid().asBareJid(), "urn:xmpp:push:0")
1796 || hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:push:0");
1797 }
1798
1799 public boolean rosterVersioning() {
1800 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1801 }
1802
1803 public void setBlockListRequested(boolean value) {
1804 this.blockListRequested = value;
1805 }
1806
1807 public boolean p1S3FileTransfer() {
1808 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.P1_S3_FILE_TRANSFER);
1809 }
1810
1811 public boolean httpUpload(long filesize) {
1812 if (Config.DISABLE_HTTP_UPLOAD) {
1813 return false;
1814 } else {
1815 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1816 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1817 if (items.size() > 0) {
1818 try {
1819 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1820 if (filesize <= maxsize) {
1821 return true;
1822 } else {
1823 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
1824 return false;
1825 }
1826 } catch (Exception e) {
1827 return true;
1828 }
1829 }
1830 }
1831 return false;
1832 }
1833 }
1834
1835 public boolean useLegacyHttpUpload() {
1836 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
1837 }
1838
1839 public long getMaxHttpUploadSize() {
1840 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1841 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1842 if (items.size() > 0) {
1843 try {
1844 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1845 } catch (Exception e) {
1846 //ignored
1847 }
1848 }
1849 }
1850 return -1;
1851 }
1852
1853 public boolean stanzaIds() {
1854 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
1855 }
1856 }
1857}