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.SSLSocket;
51import javax.net.ssl.SSLSocketFactory;
52import javax.net.ssl.X509KeyManager;
53import javax.net.ssl.X509TrustManager;
54
55import eu.siacs.conversations.Config;
56import eu.siacs.conversations.R;
57import eu.siacs.conversations.crypto.DomainHostnameVerifier;
58import eu.siacs.conversations.crypto.XmppDomainVerifier;
59import eu.siacs.conversations.crypto.axolotl.AxolotlService;
60import eu.siacs.conversations.crypto.sasl.Anonymous;
61import eu.siacs.conversations.crypto.sasl.DigestMd5;
62import eu.siacs.conversations.crypto.sasl.External;
63import eu.siacs.conversations.crypto.sasl.Plain;
64import eu.siacs.conversations.crypto.sasl.SaslMechanism;
65import eu.siacs.conversations.crypto.sasl.ScramSha1;
66import eu.siacs.conversations.crypto.sasl.ScramSha256;
67import eu.siacs.conversations.entities.Account;
68import eu.siacs.conversations.entities.Message;
69import eu.siacs.conversations.entities.ServiceDiscoveryResult;
70import eu.siacs.conversations.generator.IqGenerator;
71import eu.siacs.conversations.persistance.FileBackend;
72import eu.siacs.conversations.services.MemorizingTrustManager;
73import eu.siacs.conversations.services.MessageArchiveService;
74import eu.siacs.conversations.services.NotificationService;
75import eu.siacs.conversations.services.XmppConnectionService;
76import eu.siacs.conversations.utils.CryptoHelper;
77import eu.siacs.conversations.utils.Patterns;
78import eu.siacs.conversations.utils.Resolver;
79import eu.siacs.conversations.utils.SSLSocketHelper;
80import eu.siacs.conversations.utils.SocksSocketFactory;
81import eu.siacs.conversations.xml.Element;
82import eu.siacs.conversations.xml.Namespace;
83import eu.siacs.conversations.xml.Tag;
84import eu.siacs.conversations.xml.TagWriter;
85import eu.siacs.conversations.xml.XmlReader;
86import eu.siacs.conversations.xmpp.forms.Data;
87import eu.siacs.conversations.xmpp.forms.Field;
88import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
89import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
90import eu.siacs.conversations.xmpp.stanzas.AbstractAcknowledgeableStanza;
91import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
92import eu.siacs.conversations.xmpp.stanzas.IqPacket;
93import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
94import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
95import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
96import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
97import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
98import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
99import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
100import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
101import rocks.xmpp.addr.Jid;
102
103public class XmppConnection implements Runnable {
104
105 private static final int PACKET_IQ = 0;
106 private static final int PACKET_MESSAGE = 1;
107 private static final int PACKET_PRESENCE = 2;
108 public final OnIqPacketReceived registrationResponseListener = new OnIqPacketReceived() {
109 @Override
110 public void onIqPacketReceived(Account account, IqPacket packet) {
111 if (packet.getType() == IqPacket.TYPE.RESULT) {
112 account.setOption(Account.OPTION_REGISTER, false);
113 throw new StateChangingError(Account.State.REGISTRATION_SUCCESSFUL);
114 } else {
115 final List<String> PASSWORD_TOO_WEAK_MSGS = Arrays.asList(
116 "The password is too weak",
117 "Please use a longer password.");
118 Element error = packet.findChild("error");
119 Account.State state = Account.State.REGISTRATION_FAILED;
120 if (error != null) {
121 if (error.hasChild("conflict")) {
122 state = Account.State.REGISTRATION_CONFLICT;
123 } else if (error.hasChild("resource-constraint")
124 && "wait".equals(error.getAttribute("type"))) {
125 state = Account.State.REGISTRATION_PLEASE_WAIT;
126 } else if (error.hasChild("not-acceptable")
127 && PASSWORD_TOO_WEAK_MSGS.contains(error.findChildContent("text"))) {
128 state = Account.State.REGISTRATION_PASSWORD_TOO_WEAK;
129 }
130 }
131 throw new StateChangingError(state);
132 }
133 }
134 };
135 protected final Account account;
136 private final Features features = new Features(this);
137 private final HashMap<Jid, ServiceDiscoveryResult> disco = new HashMap<>();
138 private final SparseArray<AbstractAcknowledgeableStanza> mStanzaQueue = new SparseArray<>();
139 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
140 private final Set<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new HashSet<>();
141 private final XmppConnectionService mXmppConnectionService;
142 private Socket socket;
143 private XmlReader tagReader;
144 private TagWriter tagWriter = new TagWriter();
145 private boolean shouldAuthenticate = true;
146 private boolean inSmacksSession = false;
147 private boolean isBound = false;
148 private Element streamFeatures;
149 private String streamId = null;
150 private int smVersion = 3;
151 private int stanzasReceived = 0;
152 private int stanzasSent = 0;
153 private long lastPacketReceived = 0;
154 private long lastPingSent = 0;
155 private long lastConnect = 0;
156 private long lastSessionStarted = 0;
157 private long lastDiscoStarted = 0;
158 private boolean isMamPreferenceAlways = false;
159 private AtomicInteger mPendingServiceDiscoveries = new AtomicInteger(0);
160 private AtomicBoolean mWaitForDisco = new AtomicBoolean(true);
161 private AtomicBoolean mWaitingForSmCatchup = new AtomicBoolean(false);
162 private AtomicInteger mSmCatchupMessageCounter = new AtomicInteger(0);
163 private boolean mInteractive = false;
164 private int attempt = 0;
165 private OnPresencePacketReceived presenceListener = null;
166 private OnJinglePacketReceived jingleListener = null;
167 private OnIqPacketReceived unregisteredIqListener = null;
168 private OnMessagePacketReceived messageListener = null;
169 private OnStatusChanged statusListener = null;
170 private OnBindListener bindListener = null;
171 private OnMessageAcknowledged acknowledgedListener = null;
172 private SaslMechanism saslMechanism;
173 private URL redirectionUrl = null;
174 private String verifiedHostname = null;
175 private volatile Thread mThread;
176 private CountDownLatch mStreamCountDownLatch;
177
178
179 public XmppConnection(final Account account, final XmppConnectionService service) {
180 this.account = account;
181 this.mXmppConnectionService = service;
182 }
183
184 private static void fixResource(Context context, Account account) {
185 String resource = account.getResource();
186 int fixedPartLength = context.getString(R.string.app_name).length() + 1; //include the trailing dot
187 int randomPartLength = 4; // 3 bytes
188 if (resource != null && resource.length() > fixedPartLength + randomPartLength) {
189 if (validBase64(resource.substring(fixedPartLength, fixedPartLength + randomPartLength))) {
190 account.setResource(resource.substring(0, fixedPartLength + randomPartLength));
191 }
192 }
193 }
194
195 private static boolean validBase64(String input) {
196 try {
197 return Base64.decode(input, Base64.URL_SAFE).length == 3;
198 } catch (Throwable throwable) {
199 return false;
200 }
201 }
202
203 private void changeStatus(final Account.State nextStatus) {
204 synchronized (this) {
205 if (Thread.currentThread().isInterrupted()) {
206 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not changing status to " + nextStatus + " because thread was interrupted");
207 return;
208 }
209 if (account.getStatus() != nextStatus) {
210 if ((nextStatus == Account.State.OFFLINE)
211 && (account.getStatus() != Account.State.CONNECTING)
212 && (account.getStatus() != Account.State.ONLINE)
213 && (account.getStatus() != Account.State.DISABLED)) {
214 return;
215 }
216 if (nextStatus == Account.State.ONLINE) {
217 this.attempt = 0;
218 }
219 account.setStatus(nextStatus);
220 } else {
221 return;
222 }
223 }
224 if (statusListener != null) {
225 statusListener.onStatusChanged(account);
226 }
227 }
228
229 public void prepareNewConnection() {
230 this.lastConnect = SystemClock.elapsedRealtime();
231 this.lastPingSent = SystemClock.elapsedRealtime();
232 this.lastDiscoStarted = Long.MAX_VALUE;
233 this.mWaitingForSmCatchup.set(false);
234 this.changeStatus(Account.State.CONNECTING);
235 }
236
237 public boolean isWaitingForSmCatchup() {
238 return mWaitingForSmCatchup.get();
239 }
240
241 public void incrementSmCatchupMessageCounter() {
242 this.mSmCatchupMessageCounter.incrementAndGet();
243 }
244
245 protected void connect() {
246 if (mXmppConnectionService.areMessagesInitialized()) {
247 mXmppConnectionService.resetSendingToWaiting(account);
248 }
249 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": connecting");
250 features.encryptionEnabled = false;
251 inSmacksSession = false;
252 isBound = false;
253 this.attempt++;
254 this.verifiedHostname = null; //will be set if user entered hostname is being used or hostname was verified with dnssec
255 try {
256 Socket localSocket;
257 shouldAuthenticate = !account.isOptionSet(Account.OPTION_REGISTER);
258 this.changeStatus(Account.State.CONNECTING);
259 final boolean useTor = mXmppConnectionService.useTorToConnect() || account.isOnion();
260 final boolean extended = mXmppConnectionService.showExtendedConnectionOptions();
261 if (useTor) {
262 String destination;
263 if (account.getHostname().isEmpty()) {
264 destination = account.getServer();
265 } else {
266 destination = account.getHostname();
267 this.verifiedHostname = destination;
268 }
269 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": connect to " + destination + " via Tor");
270 localSocket = SocksSocketFactory.createSocketOverTor(destination, account.getPort());
271 try {
272 startXmpp(localSocket);
273 } catch (InterruptedException e) {
274 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
275 return;
276 } catch (Exception e) {
277 throw new IOException(e.getMessage());
278 }
279 } else {
280 final String domain = account.getJid().getDomain();
281 final List<Resolver.Result> results;
282 final boolean hardcoded = extended && !account.getHostname().isEmpty();
283 if (hardcoded) {
284 results = Resolver.fromHardCoded(account.getHostname(), account.getPort());
285 } else {
286 results = Resolver.resolve(domain);
287 }
288 if (Thread.currentThread().isInterrupted()) {
289 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
290 return;
291 }
292 if (results.size() == 0) {
293 Log.e(Config.LOGTAG,account.getJid().asBareJid()+": Resolver results were empty");
294 return;
295 }
296 final Resolver.Result storedBackupResult;
297 if (hardcoded) {
298 storedBackupResult = null;
299 } else {
300 storedBackupResult = mXmppConnectionService.databaseBackend.findResolverResult(domain);
301 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
302 results.add(storedBackupResult);
303 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": loaded backup resolver result from db: " + storedBackupResult);
304 }
305 }
306 for (Iterator<Resolver.Result> iterator = results.iterator(); iterator.hasNext(); ) {
307 final Resolver.Result result = iterator.next();
308 if (Thread.currentThread().isInterrupted()) {
309 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
310 return;
311 }
312 try {
313 // if tls is true, encryption is implied and must not be started
314 features.encryptionEnabled = result.isDirectTls();
315 verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
316 Log.d(Config.LOGTAG,"verified hostname "+verifiedHostname);
317 final InetSocketAddress addr;
318 if (result.getIp() != null) {
319 addr = new InetSocketAddress(result.getIp(), result.getPort());
320 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
321 + ": using values from resolver " + (result.getHostname() == null ? "" : result.getHostname().toString()
322 + "/") + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
323 } else {
324 addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort());
325 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
326 + ": using values from resolver "
327 + result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
328 }
329
330 if (!features.encryptionEnabled) {
331 localSocket = new Socket();
332 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
333 } else {
334 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
335 localSocket = tlsFactoryVerifier.factory.createSocket();
336
337 if (localSocket == null) {
338 throw new IOException("could not initialize ssl socket");
339 }
340
341 SSLSocketHelper.setSecurity((SSLSocket) localSocket);
342 SSLSocketHelper.setHostname((SSLSocket) localSocket, account.getServer());
343 SSLSocketHelper.setApplicationProtocol((SSLSocket) localSocket, "xmpp-client");
344
345 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
346
347 if (!tlsFactoryVerifier.verifier.verify(account.getServer(), verifiedHostname, ((SSLSocket) localSocket).getSession())) {
348 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
349 if (!iterator.hasNext()) {
350 throw new StateChangingException(Account.State.TLS_ERROR);
351 }
352 }
353 }
354 localSocket.setSoTimeout(Config.SOCKET_TIMEOUT * 1000);
355 if (startXmpp(localSocket)) {
356 localSocket.setSoTimeout(0); //reset to 0; once the connection is established we don’t want this
357 if (!hardcoded && !result.equals(storedBackupResult)) {
358 mXmppConnectionService.databaseBackend.saveResolverResult(domain, result);
359 }
360 break; // successfully connected to server that speaks xmpp
361 } else {
362 localSocket.close();
363 if (!iterator.hasNext()) {
364 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
365 }
366 }
367 } catch (final StateChangingException e) {
368 throw e;
369 } catch (InterruptedException e) {
370 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
371 return;
372 } catch (final Throwable e) {
373 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
374 if (!iterator.hasNext()) {
375 throw new UnknownHostException();
376 }
377 }
378 }
379 }
380 processStream();
381 } catch (final SecurityException e) {
382 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
383 } catch (final StateChangingException e) {
384 this.changeStatus(e.state);
385 } catch (final UnknownHostException | ConnectException e) {
386 this.changeStatus(Account.State.SERVER_NOT_FOUND);
387 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
388 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
389 } catch (final IOException | XmlPullParserException e) {
390 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
391 this.changeStatus(Account.State.OFFLINE);
392 this.attempt = Math.max(0, this.attempt - 1);
393 } finally {
394 if (!Thread.currentThread().isInterrupted()) {
395 forceCloseSocket();
396 } else {
397 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not force closing socket because thread was interrupted");
398 }
399 }
400 }
401
402 /**
403 * Starts xmpp protocol, call after connecting to socket
404 *
405 * @return true if server returns with valid xmpp, false otherwise
406 */
407 private boolean startXmpp(Socket socket) throws Exception {
408 if (Thread.currentThread().isInterrupted()) {
409 throw new InterruptedException();
410 }
411 this.socket = socket;
412 tagReader = new XmlReader();
413 if (tagWriter != null) {
414 tagWriter.forceClose();
415 }
416 tagWriter = new TagWriter();
417 tagWriter.setOutputStream(socket.getOutputStream());
418 tagReader.setInputStream(socket.getInputStream());
419 tagWriter.beginDocument();
420 sendStartStream();
421 final Tag tag = tagReader.readTag();
422 if (Thread.currentThread().isInterrupted()) {
423 throw new InterruptedException();
424 }
425 if (socket instanceof SSLSocket) {
426 SSLSocketHelper.log(account, (SSLSocket) socket);
427 }
428 return tag != null && tag.isStart("stream");
429 }
430
431 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
432 final SSLContext sc = SSLSocketHelper.getSSLContext();
433 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
434 KeyManager[] keyManager;
435 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
436 keyManager = new KeyManager[]{new MyKeyManager()};
437 } else {
438 keyManager = null;
439 }
440 String domain = account.getJid().getDomain();
441 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
442 final SSLSocketFactory factory = sc.getSocketFactory();
443 final DomainHostnameVerifier verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier(), mInteractive);
444 return new TlsFactoryVerifier(factory, verifier);
445 }
446
447 @Override
448 public void run() {
449 synchronized (this) {
450 this.mThread = Thread.currentThread();
451 if (this.mThread.isInterrupted()) {
452 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": aborting connect because thread was interrupted");
453 return;
454 }
455 forceCloseSocket();
456 }
457 connect();
458 }
459
460 private void processStream() throws XmlPullParserException, IOException {
461 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
462 this.mStreamCountDownLatch = streamCountDownLatch;
463 Tag nextTag = tagReader.readTag();
464 while (nextTag != null && !nextTag.isEnd("stream")) {
465 if (nextTag.isStart("error")) {
466 processStreamError(nextTag);
467 } else if (nextTag.isStart("features")) {
468 processStreamFeatures(nextTag);
469 } else if (nextTag.isStart("proceed")) {
470 switchOverToTls();
471 } else if (nextTag.isStart("success")) {
472 final String challenge = tagReader.readElement(nextTag).getContent();
473 try {
474 saslMechanism.getResponse(challenge);
475 } catch (final SaslMechanism.AuthenticationException e) {
476 Log.e(Config.LOGTAG, String.valueOf(e));
477 throw new StateChangingException(Account.State.UNAUTHORIZED);
478 }
479 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": logged in");
480 account.setKey(Account.PINNED_MECHANISM_KEY,
481 String.valueOf(saslMechanism.getPriority()));
482 tagReader.reset();
483 sendStartStream();
484 final Tag tag = tagReader.readTag();
485 if (tag != null && tag.isStart("stream")) {
486 processStream();
487 } else {
488 throw new StateChangingException(Account.State.STREAM_OPENING_ERROR);
489 }
490 break;
491 } else if (nextTag.isStart("failure")) {
492 final Element failure = tagReader.readElement(nextTag);
493 if (Namespace.SASL.equals(failure.getNamespace())) {
494 final String text = failure.findChildContent("text");
495 if (failure.hasChild("account-disabled") && text != null) {
496 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
497 if (matcher.find()) {
498 try {
499 URL url = new URL(text.substring(matcher.start(), matcher.end()));
500 if (url.getProtocol().equals("https")) {
501 this.redirectionUrl = url;
502 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
503 }
504 } catch (MalformedURLException e) {
505 throw new StateChangingException(Account.State.UNAUTHORIZED);
506 }
507 }
508 }
509 throw new StateChangingException(Account.State.UNAUTHORIZED);
510 } else if (Namespace.TLS.equals(failure.getNamespace())) {
511 throw new StateChangingException(Account.State.TLS_ERROR);
512 } else {
513 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
514 }
515 } else if (nextTag.isStart("challenge")) {
516 final String challenge = tagReader.readElement(nextTag).getContent();
517 final Element response = new Element("response", Namespace.SASL);
518 try {
519 response.setContent(saslMechanism.getResponse(challenge));
520 } catch (final SaslMechanism.AuthenticationException e) {
521 // TODO: Send auth abort tag.
522 Log.e(Config.LOGTAG, e.toString());
523 }
524 tagWriter.writeElement(response);
525 } else if (nextTag.isStart("enabled")) {
526 final Element enabled = tagReader.readElement(nextTag);
527 if ("true".equals(enabled.getAttribute("resume"))) {
528 this.streamId = enabled.getAttribute("id");
529 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
530 + ": stream management(" + smVersion
531 + ") enabled (resumable)");
532 } else {
533 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
534 + ": stream management(" + smVersion + ") enabled");
535 }
536 this.stanzasReceived = 0;
537 this.inSmacksSession = true;
538 final RequestPacket r = new RequestPacket(smVersion);
539 tagWriter.writeStanzaAsync(r);
540 } else if (nextTag.isStart("resumed")) {
541 this.inSmacksSession = true;
542 this.isBound = true;
543 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
544 lastPacketReceived = SystemClock.elapsedRealtime();
545 final Element resumed = tagReader.readElement(nextTag);
546 final String h = resumed.getAttribute("h");
547 try {
548 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
549 final boolean acknowledgedMessages;
550 synchronized (this.mStanzaQueue) {
551 final int serverCount = Integer.parseInt(h);
552 if (serverCount < stanzasSent) {
553 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
554 + ": session resumed with lost packages");
555 stanzasSent = serverCount;
556 } else {
557 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed");
558 }
559 acknowledgedMessages = acknowledgeStanzaUpTo(serverCount);
560 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
561 failedStanzas.add(mStanzaQueue.valueAt(i));
562 }
563 mStanzaQueue.clear();
564 }
565 if (acknowledgedMessages) {
566 mXmppConnectionService.updateConversationUi();
567 }
568 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
569 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
570 if (packet instanceof MessagePacket) {
571 MessagePacket message = (MessagePacket) packet;
572 mXmppConnectionService.markMessage(account,
573 message.getTo().asBareJid(),
574 message.getId(),
575 Message.STATUS_UNSEND);
576 }
577 sendPacket(packet);
578 }
579 } catch (final NumberFormatException ignored) {
580 }
581 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
582 changeStatus(Account.State.ONLINE);
583 } else if (nextTag.isStart("r")) {
584 tagReader.readElement(nextTag);
585 if (Config.EXTENDED_SM_LOGGING) {
586 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
587 }
588 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
589 tagWriter.writeStanzaAsync(ack);
590 } else if (nextTag.isStart("a")) {
591 boolean accountUiNeedsRefresh = false;
592 synchronized (NotificationService.CATCHUP_LOCK) {
593 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
594 final int messageCount = mSmCatchupMessageCounter.get();
595 final int pendingIQs = packetCallbacks.size();
596 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": SM catchup complete (messages=" + messageCount + ", pending IQs="+pendingIQs+")");
597 accountUiNeedsRefresh = true;
598 if (messageCount > 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 discoverMamPreferences();
1174 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1175 if (!requestDiscoItemsFirst) {
1176 sendServiceDiscoveryItems(Jid.of(account.getServer()));
1177 }
1178
1179 if (!mWaitForDisco.get()) {
1180 finalizeBind();
1181 }
1182 this.lastSessionStarted = SystemClock.elapsedRealtime();
1183 }
1184
1185 private void sendServiceDiscoveryInfo(final Jid jid) {
1186 mPendingServiceDiscoveries.incrementAndGet();
1187 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1188 iq.setTo(jid);
1189 iq.query("http://jabber.org/protocol/disco#info");
1190 this.sendIqPacket(iq, (account, packet) -> {
1191 if (packet.getType() == IqPacket.TYPE.RESULT) {
1192 boolean advancedStreamFeaturesLoaded;
1193 synchronized (XmppConnection.this.disco) {
1194 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1195 if (jid.equals(Jid.of(account.getServer()))) {
1196 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1197 }
1198 disco.put(jid, result);
1199 advancedStreamFeaturesLoaded = disco.containsKey(Jid.of(account.getServer()))
1200 && disco.containsKey(account.getJid().asBareJid());
1201 }
1202 if (advancedStreamFeaturesLoaded && (jid.equals(Jid.of(account.getServer())) || jid.equals(account.getJid().asBareJid()))) {
1203 enableAdvancedStreamFeatures();
1204 }
1205 } else {
1206 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1207 }
1208 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1209 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1210 && mWaitForDisco.compareAndSet(true, false)) {
1211 finalizeBind();
1212 }
1213 }
1214 });
1215 }
1216
1217 private void discoverMamPreferences() {
1218 IqPacket request = new IqPacket(IqPacket.TYPE.GET);
1219 request.addChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1220 sendIqPacket(request, (account, response) -> {
1221 if (response.getType() == IqPacket.TYPE.RESULT) {
1222 Element prefs = response.findChild("prefs", MessageArchiveService.Version.MAM_2.namespace);
1223 isMamPreferenceAlways = "always".equals(prefs == null ? null : prefs.getAttribute("default"));
1224 }
1225 });
1226 }
1227
1228 public boolean isMamPreferenceAlways() {
1229 return isMamPreferenceAlways;
1230 }
1231
1232 private void finalizeBind() {
1233 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1234 if (bindListener != null) {
1235 bindListener.onBind(account);
1236 }
1237 changeStatus(Account.State.ONLINE);
1238 }
1239
1240 private void enableAdvancedStreamFeatures() {
1241 if (getFeatures().carbons() && !features.carbonsEnabled) {
1242 sendEnableCarbons();
1243 }
1244 if (getFeatures().blocking() && !features.blockListRequested) {
1245 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1246 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1247 }
1248 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1249 listener.onAdvancedStreamFeaturesAvailable(account);
1250 }
1251 }
1252
1253 private void sendServiceDiscoveryItems(final Jid server) {
1254 mPendingServiceDiscoveries.incrementAndGet();
1255 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1256 iq.setTo(Jid.ofDomain(server.getDomain()));
1257 iq.query("http://jabber.org/protocol/disco#items");
1258 this.sendIqPacket(iq, (account, packet) -> {
1259 if (packet.getType() == IqPacket.TYPE.RESULT) {
1260 HashSet<Jid> items = new HashSet<Jid>();
1261 final List<Element> elements = packet.query().getChildren();
1262 for (final Element element : elements) {
1263 if (element.getName().equals("item")) {
1264 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1265 if (jid != null && !jid.equals(Jid.of(account.getServer()))) {
1266 items.add(jid);
1267 }
1268 }
1269 }
1270 for (Jid jid : items) {
1271 sendServiceDiscoveryInfo(jid);
1272 }
1273 } else {
1274 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1275 }
1276 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1277 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1278 && mWaitForDisco.compareAndSet(true, false)) {
1279 finalizeBind();
1280 }
1281 }
1282 });
1283 }
1284
1285 private void sendEnableCarbons() {
1286 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1287 iq.addChild("enable", "urn:xmpp:carbons:2");
1288 this.sendIqPacket(iq, new OnIqPacketReceived() {
1289
1290 @Override
1291 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1292 if (!packet.hasChild("error")) {
1293 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1294 + ": successfully enabled carbons");
1295 features.carbonsEnabled = true;
1296 } else {
1297 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1298 + ": error enableing carbons " + packet.toString());
1299 }
1300 }
1301 });
1302 }
1303
1304 private void processStreamError(final Tag currentTag) throws XmlPullParserException, IOException {
1305 final Element streamError = tagReader.readElement(currentTag);
1306 if (streamError == null) {
1307 return;
1308 }
1309 if (streamError.hasChild("conflict")) {
1310 account.setResource(createNewResource());
1311 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1312 throw new IOException();
1313 } else if (streamError.hasChild("host-unknown")) {
1314 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1315 } else if (streamError.hasChild("policy-violation")) { ;
1316 final String text = streamError.findChildContent("text");
1317 if (text != null) {
1318 Log.d(Config.LOGTAG,account.getJid().asBareJid()+": policy violation. "+text);
1319 }
1320 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1321 } else {
1322 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError.toString());
1323 throw new StateChangingException(Account.State.STREAM_ERROR);
1324 }
1325 }
1326
1327 private void sendStartStream() throws IOException {
1328 final Tag stream = Tag.start("stream:stream");
1329 stream.setAttribute("to", account.getServer());
1330 stream.setAttribute("version", "1.0");
1331 stream.setAttribute("xml:lang", "en");
1332 stream.setAttribute("xmlns", "jabber:client");
1333 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1334 tagWriter.writeTag(stream);
1335 }
1336
1337 private String createNewResource() {
1338 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1339 }
1340
1341 private String nextRandomId() {
1342 return nextRandomId(false);
1343 }
1344
1345 private String nextRandomId(boolean s) {
1346 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1347 }
1348
1349 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1350 packet.setFrom(account.getJid());
1351 return this.sendUnmodifiedIqPacket(packet, callback, false);
1352 }
1353
1354 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1355 if (packet.getId() == null) {
1356 packet.setAttribute("id", nextRandomId());
1357 }
1358 if (callback != null) {
1359 synchronized (this.packetCallbacks) {
1360 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1361 }
1362 }
1363 this.sendPacket(packet, force);
1364 return packet.getId();
1365 }
1366
1367 public void sendMessagePacket(final MessagePacket packet) {
1368 this.sendPacket(packet);
1369 }
1370
1371 public void sendPresencePacket(final PresencePacket packet) {
1372 this.sendPacket(packet);
1373 }
1374
1375 private synchronized void sendPacket(final AbstractStanza packet) {
1376 sendPacket(packet, false);
1377 }
1378
1379 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1380 if (stanzasSent == Integer.MAX_VALUE) {
1381 resetStreamId();
1382 disconnect(true);
1383 return;
1384 }
1385 synchronized (this.mStanzaQueue) {
1386 if (force || isBound) {
1387 tagWriter.writeStanzaAsync(packet);
1388 } else {
1389 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1390 }
1391 if (packet instanceof AbstractAcknowledgeableStanza) {
1392 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1393
1394 if (this.mStanzaQueue.size() != 0) {
1395 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1396 if (currentHighestKey != stanzasSent) {
1397 throw new AssertionError("Stanza count messed up");
1398 }
1399 }
1400
1401 ++stanzasSent;
1402 this.mStanzaQueue.append(stanzasSent, stanza);
1403 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1404 if (Config.EXTENDED_SM_LOGGING) {
1405 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1406 }
1407 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1408 }
1409 }
1410 }
1411 }
1412
1413 public void sendPing() {
1414 if (!r()) {
1415 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1416 iq.setFrom(account.getJid());
1417 iq.addChild("ping", "urn:xmpp:ping");
1418 this.sendIqPacket(iq, null);
1419 }
1420 this.lastPingSent = SystemClock.elapsedRealtime();
1421 }
1422
1423 public void setOnMessagePacketReceivedListener(
1424 final OnMessagePacketReceived listener) {
1425 this.messageListener = listener;
1426 }
1427
1428 public void setOnUnregisteredIqPacketReceivedListener(
1429 final OnIqPacketReceived listener) {
1430 this.unregisteredIqListener = listener;
1431 }
1432
1433 public void setOnPresencePacketReceivedListener(
1434 final OnPresencePacketReceived listener) {
1435 this.presenceListener = listener;
1436 }
1437
1438 public void setOnJinglePacketReceivedListener(
1439 final OnJinglePacketReceived listener) {
1440 this.jingleListener = listener;
1441 }
1442
1443 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1444 this.statusListener = listener;
1445 }
1446
1447 public void setOnBindListener(final OnBindListener listener) {
1448 this.bindListener = listener;
1449 }
1450
1451 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1452 this.acknowledgedListener = listener;
1453 }
1454
1455 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1456 this.advancedStreamFeaturesLoadedListeners.add(listener);
1457 }
1458
1459 private void forceCloseSocket() {
1460 if (socket != null) {
1461 try {
1462 socket.close();
1463 } catch (IOException e) {
1464 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception " + e.getMessage() + " during force close");
1465 }
1466 } else {
1467 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": socket was null during force close");
1468 }
1469 }
1470
1471 public void interrupt() {
1472 if (this.mThread != null) {
1473 this.mThread.interrupt();
1474 }
1475 }
1476
1477 public void disconnect(final boolean force) {
1478 interrupt();
1479 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + Boolean.toString(force));
1480 if (force) {
1481 forceCloseSocket();
1482 } else {
1483 final TagWriter currentTagWriter = this.tagWriter;
1484 if (currentTagWriter.isActive()) {
1485 currentTagWriter.finish();
1486 final Socket currentSocket = this.socket;
1487 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1488 try {
1489 currentTagWriter.await(1, TimeUnit.SECONDS);
1490 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1491 currentTagWriter.writeTag(Tag.end("stream:stream"));
1492 if (streamCountDownLatch != null) {
1493 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1494 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1495 } else {
1496 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1497 }
1498 }
1499 } catch (InterruptedException e) {
1500 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1501 } catch (final IOException e) {
1502 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1503 } finally {
1504 FileBackend.close(currentSocket);
1505 }
1506 } else {
1507 forceCloseSocket();
1508 }
1509 }
1510 }
1511
1512 private void resetStreamId() {
1513 this.streamId = null;
1514 }
1515
1516 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1517 synchronized (this.disco) {
1518 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1519 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1520 if (cursor.getValue().getFeatures().contains(feature)) {
1521 items.add(cursor);
1522 }
1523 }
1524 return items;
1525 }
1526 }
1527
1528 public Jid findDiscoItemByFeature(final String feature) {
1529 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1530 if (items.size() >= 1) {
1531 return items.get(0).getKey();
1532 }
1533 return null;
1534 }
1535
1536 public boolean r() {
1537 if (getFeatures().sm()) {
1538 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1539 return true;
1540 } else {
1541 return false;
1542 }
1543 }
1544
1545 public List<String> getMucServersWithholdAccount() {
1546 List<String> servers = getMucServers();
1547 servers.remove(account.getServer());
1548 return servers;
1549 }
1550
1551 public List<String> getMucServers() {
1552 List<String> servers = new ArrayList<>();
1553 synchronized (this.disco) {
1554 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1555 final ServiceDiscoveryResult value = cursor.getValue();
1556 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1557 && value.hasIdentity("conference", "text")
1558 && !value.getFeatures().contains("jabber:iq:gateway")
1559 && !value.hasIdentity("conference", "irc")) {
1560 servers.add(cursor.getKey().toString());
1561 }
1562 }
1563 }
1564 return servers;
1565 }
1566
1567 public String getMucServer() {
1568 List<String> servers = getMucServers();
1569 return servers.size() > 0 ? servers.get(0) : null;
1570 }
1571
1572 public int getTimeToNextAttempt() {
1573 final int interval = Math.min((int) (25 * Math.pow(1.3, attempt)), 300);
1574 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1575 return interval - secondsSinceLast;
1576 }
1577
1578 public int getAttempt() {
1579 return this.attempt;
1580 }
1581
1582 public Features getFeatures() {
1583 return this.features;
1584 }
1585
1586 public long getLastSessionEstablished() {
1587 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1588 return System.currentTimeMillis() - diff;
1589 }
1590
1591 public long getLastConnect() {
1592 return this.lastConnect;
1593 }
1594
1595 public long getLastPingSent() {
1596 return this.lastPingSent;
1597 }
1598
1599 public long getLastDiscoStarted() {
1600 return this.lastDiscoStarted;
1601 }
1602
1603 public long getLastPacketReceived() {
1604 return this.lastPacketReceived;
1605 }
1606
1607 public void sendActive() {
1608 this.sendPacket(new ActivePacket());
1609 }
1610
1611 public void sendInactive() {
1612 this.sendPacket(new InactivePacket());
1613 }
1614
1615 public void resetAttemptCount(boolean resetConnectTime) {
1616 this.attempt = 0;
1617 if (resetConnectTime) {
1618 this.lastConnect = 0;
1619 }
1620 }
1621
1622 public void setInteractive(boolean interactive) {
1623 this.mInteractive = interactive;
1624 }
1625
1626 public Identity getServerIdentity() {
1627 synchronized (this.disco) {
1628 ServiceDiscoveryResult result = disco.get(Jid.ofDomain(account.getJid().getDomain()));
1629 if (result == null) {
1630 return Identity.UNKNOWN;
1631 }
1632 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1633 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1634 switch (id.getName()) {
1635 case "Prosody":
1636 return Identity.PROSODY;
1637 case "ejabberd":
1638 return Identity.EJABBERD;
1639 case "Slack-XMPP":
1640 return Identity.SLACK;
1641 }
1642 }
1643 }
1644 }
1645 return Identity.UNKNOWN;
1646 }
1647
1648 private IqGenerator getIqGenerator() {
1649 return mXmppConnectionService.getIqGenerator();
1650 }
1651
1652 public enum Identity {
1653 FACEBOOK,
1654 SLACK,
1655 EJABBERD,
1656 PROSODY,
1657 NIMBUZZ,
1658 UNKNOWN
1659 }
1660
1661 private static class TlsFactoryVerifier {
1662 private final SSLSocketFactory factory;
1663 private final DomainHostnameVerifier verifier;
1664
1665 TlsFactoryVerifier(final SSLSocketFactory factory, final DomainHostnameVerifier verifier) throws IOException {
1666 this.factory = factory;
1667 this.verifier = verifier;
1668 if (factory == null || verifier == null) {
1669 throw new IOException("could not setup ssl");
1670 }
1671 }
1672 }
1673
1674 private class MyKeyManager implements X509KeyManager {
1675 @Override
1676 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1677 return account.getPrivateKeyAlias();
1678 }
1679
1680 @Override
1681 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1682 return null;
1683 }
1684
1685 @Override
1686 public X509Certificate[] getCertificateChain(String alias) {
1687 Log.d(Config.LOGTAG, "getting certificate chain");
1688 try {
1689 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1690 } catch (Exception e) {
1691 Log.d(Config.LOGTAG, e.getMessage());
1692 return new X509Certificate[0];
1693 }
1694 }
1695
1696 @Override
1697 public String[] getClientAliases(String s, Principal[] principals) {
1698 final String alias = account.getPrivateKeyAlias();
1699 return alias != null ? new String[]{alias} : new String[0];
1700 }
1701
1702 @Override
1703 public String[] getServerAliases(String s, Principal[] principals) {
1704 return new String[0];
1705 }
1706
1707 @Override
1708 public PrivateKey getPrivateKey(String alias) {
1709 try {
1710 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1711 } catch (Exception e) {
1712 return null;
1713 }
1714 }
1715 }
1716
1717 private class StateChangingError extends Error {
1718 private final Account.State state;
1719
1720 public StateChangingError(Account.State state) {
1721 this.state = state;
1722 }
1723 }
1724
1725 private class StateChangingException extends IOException {
1726 private final Account.State state;
1727
1728 public StateChangingException(Account.State state) {
1729 this.state = state;
1730 }
1731 }
1732
1733 public class Features {
1734 XmppConnection connection;
1735 private boolean carbonsEnabled = false;
1736 private boolean encryptionEnabled = false;
1737 private boolean blockListRequested = false;
1738
1739 public Features(final XmppConnection connection) {
1740 this.connection = connection;
1741 }
1742
1743 private boolean hasDiscoFeature(final Jid server, final String feature) {
1744 synchronized (XmppConnection.this.disco) {
1745 return connection.disco.containsKey(server) &&
1746 connection.disco.get(server).getFeatures().contains(feature);
1747 }
1748 }
1749
1750 public boolean carbons() {
1751 return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:carbons:2");
1752 }
1753
1754 public boolean bookmarksConversion() {
1755 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.BOOKMARKS_CONVERSION) && pepPublishOptions();
1756 }
1757
1758 public boolean blocking() {
1759 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.BLOCKING);
1760 }
1761
1762 public boolean spamReporting() {
1763 return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:reporting:reason:spam:0");
1764 }
1765
1766 public boolean flexibleOfflineMessageRetrieval() {
1767 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
1768 }
1769
1770 public boolean register() {
1771 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.REGISTER);
1772 }
1773
1774 public boolean sm() {
1775 return streamId != null
1776 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1777 }
1778
1779 public boolean csi() {
1780 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1781 }
1782
1783 public boolean pep() {
1784 synchronized (XmppConnection.this.disco) {
1785 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1786 return info != null && info.hasIdentity("pubsub", "pep");
1787 }
1788 }
1789
1790 public boolean pepPersistent() {
1791 synchronized (XmppConnection.this.disco) {
1792 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1793 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1794 }
1795 }
1796
1797 public boolean pepPublishOptions() {
1798 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
1799 }
1800
1801 public boolean pepOmemoWhitelisted() {
1802 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
1803 }
1804
1805 public boolean mam() {
1806 return MessageArchiveService.Version.has(getAccountFeatures());
1807 }
1808
1809 public List<String> getAccountFeatures() {
1810 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
1811 return result == null ? Collections.emptyList() : result.getFeatures();
1812 }
1813
1814 public boolean push() {
1815 return hasDiscoFeature(account.getJid().asBareJid(), "urn:xmpp:push:0")
1816 || hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:push:0");
1817 }
1818
1819 public boolean rosterVersioning() {
1820 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1821 }
1822
1823 public void setBlockListRequested(boolean value) {
1824 this.blockListRequested = value;
1825 }
1826
1827 public boolean p1S3FileTransfer() {
1828 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.P1_S3_FILE_TRANSFER);
1829 }
1830
1831 public boolean httpUpload(long filesize) {
1832 if (Config.DISABLE_HTTP_UPLOAD) {
1833 return false;
1834 } else {
1835 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1836 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1837 if (items.size() > 0) {
1838 try {
1839 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1840 if (filesize <= maxsize) {
1841 return true;
1842 } else {
1843 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
1844 return false;
1845 }
1846 } catch (Exception e) {
1847 return true;
1848 }
1849 }
1850 }
1851 return false;
1852 }
1853 }
1854
1855 public boolean useLegacyHttpUpload() {
1856 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
1857 }
1858
1859 public long getMaxHttpUploadSize() {
1860 for (String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1861 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1862 if (items.size() > 0) {
1863 try {
1864 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1865 } catch (Exception e) {
1866 //ignored
1867 }
1868 }
1869 }
1870 return -1;
1871 }
1872
1873 public boolean stanzaIds() {
1874 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
1875 }
1876 }
1877}