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.Tag;
85import eu.siacs.conversations.xml.TagWriter;
86import eu.siacs.conversations.xml.XmlReader;
87import eu.siacs.conversations.xml.Namespace;
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 Thread mThread;
177 private CountDownLatch mStreamCountDownLatch;
178
179 public XmppConnection(final Account account, final XmppConnectionService service) {
180 this.account = account;
181 final String tag = account.getJid().asBareJid().toString();
182 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 protected 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 if (extended && !account.getHostname().isEmpty()) {
281
282 this.verifiedHostname = account.getHostname();
283
284 try {
285 InetSocketAddress address = new InetSocketAddress(this.verifiedHostname, account.getPort());
286 features.encryptionEnabled = address.getPort() == 5223;
287 if (features.encryptionEnabled) {
288 try {
289 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
290 localSocket = tlsFactoryVerifier.factory.createSocket();
291 localSocket.connect(address, Config.SOCKET_TIMEOUT * 1000);
292 final SSLSession session = ((SSLSocket) localSocket).getSession();
293 final String domain = account.getJid().getDomain();
294 if (!tlsFactoryVerifier.verifier.verify(domain, this.verifiedHostname, session)) {
295 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
296 throw new StateChangingException(Account.State.TLS_ERROR);
297 }
298 } catch (KeyManagementException e) {
299 throw new StateChangingException(Account.State.TLS_ERROR);
300 }
301 } else {
302 localSocket = new Socket();
303 localSocket.connect(address, Config.SOCKET_TIMEOUT * 1000);
304 }
305 } catch (IOException | IllegalArgumentException e) {
306 throw new UnknownHostException();
307 }
308 try {
309 startXmpp(localSocket);
310 } catch (InterruptedException e) {
311 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
312 return;
313 } catch (Exception e) {
314 throw new IOException(e.getMessage());
315 }
316 } else if (IP.matches(account.getServer())) {
317 localSocket = new Socket();
318 try {
319 localSocket.connect(new InetSocketAddress(account.getServer(), 5222), Config.SOCKET_TIMEOUT * 1000);
320 } catch (IOException e) {
321 throw new UnknownHostException();
322 }
323 try {
324 startXmpp(localSocket);
325 } catch (InterruptedException e) {
326 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
327 return;
328 } catch (Exception e) {
329 throw new IOException(e.getMessage());
330 }
331 } else {
332 final String domain = account.getJid().getDomain();
333 List<Resolver.Result> results = Resolver.resolve(account.getJid().getDomain());
334 Resolver.Result storedBackupResult;
335 if (!Thread.currentThread().isInterrupted()) {
336 storedBackupResult = mXmppConnectionService.databaseBackend.findResolverResult(domain);
337 if (storedBackupResult != null && !results.contains(storedBackupResult)) {
338 results.add(storedBackupResult);
339 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": loaded backup resolver result from db: " + storedBackupResult);
340 }
341 } else {
342 storedBackupResult = null;
343 }
344 for (Iterator<Resolver.Result> iterator = results.iterator(); iterator.hasNext(); ) {
345 final Resolver.Result result = iterator.next();
346 if (Thread.currentThread().isInterrupted()) {
347 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Thread was interrupted");
348 return;
349 }
350 try {
351 // if tls is true, encryption is implied and must not be started
352 features.encryptionEnabled = result.isDirectTls();
353 verifiedHostname = result.isAuthenticated() ? result.getHostname().toString() : null;
354 final InetSocketAddress addr;
355 if (result.getIp() != null) {
356 addr = new InetSocketAddress(result.getIp(), result.getPort());
357 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
358 + ": using values from dns " + result.getHostname().toString()
359 + "/" + result.getIp().getHostAddress() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
360 } else {
361 addr = new InetSocketAddress(IDN.toASCII(result.getHostname().toString()), result.getPort());
362 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
363 + ": using values from dns "
364 + result.getHostname().toString() + ":" + result.getPort() + " tls: " + features.encryptionEnabled);
365 }
366
367 if (!features.encryptionEnabled) {
368 localSocket = new Socket();
369 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
370 } else {
371 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
372 localSocket = tlsFactoryVerifier.factory.createSocket();
373
374 if (localSocket == null) {
375 throw new IOException("could not initialize ssl socket");
376 }
377
378 SSLSocketHelper.setSecurity((SSLSocket) localSocket);
379 SSLSocketHelper.setSNIHost(tlsFactoryVerifier.factory, (SSLSocket) localSocket, account.getServer());
380 SSLSocketHelper.setAlpnProtocol(tlsFactoryVerifier.factory, (SSLSocket) localSocket, "xmpp-client");
381
382 localSocket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
383
384 if (!tlsFactoryVerifier.verifier.verify(account.getServer(), verifiedHostname, ((SSLSocket) localSocket).getSession())) {
385 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
386 if (!iterator.hasNext()) {
387 throw new StateChangingException(Account.State.TLS_ERROR);
388 }
389 }
390 }
391 if (startXmpp(localSocket)) {
392 if (!result.equals(storedBackupResult)) {
393 mXmppConnectionService.databaseBackend.saveResolverResult(domain, result);
394 }
395 break; // successfully connected to server that speaks xmpp
396 } else {
397 localSocket.close();
398 }
399 } catch (final StateChangingException e) {
400 throw e;
401 } catch (InterruptedException e) {
402 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": thread was interrupted before beginning stream");
403 return;
404 } catch (final Throwable e) {
405 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage() + "(" + e.getClass().getName() + ")");
406 if (!iterator.hasNext()) {
407 throw new UnknownHostException();
408 }
409 }
410 }
411 }
412 processStream();
413 } catch (final SecurityException e) {
414 this.changeStatus(Account.State.MISSING_INTERNET_PERMISSION);
415 } catch (final StateChangingException e) {
416 this.changeStatus(e.state);
417 } catch (final Resolver.NetworkIsUnreachableException e) {
418 this.changeStatus(Account.State.NETWORK_IS_UNREACHABLE);
419 } catch (final UnknownHostException | ConnectException e) {
420 this.changeStatus(Account.State.SERVER_NOT_FOUND);
421 } catch (final SocksSocketFactory.SocksProxyNotFoundException e) {
422 this.changeStatus(Account.State.TOR_NOT_AVAILABLE);
423 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
424 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": " + e.getMessage());
425 this.changeStatus(Account.State.OFFLINE);
426 this.attempt = Math.max(0, this.attempt - 1);
427 } finally {
428 if (!Thread.currentThread().isInterrupted()) {
429 forceCloseSocket();
430 } else {
431 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not force closing socket because thread was interrupted");
432 }
433 }
434 }
435
436 /**
437 * Starts xmpp protocol, call after connecting to socket
438 *
439 * @return true if server returns with valid xmpp, false otherwise
440 */
441 private boolean startXmpp(Socket socket) throws Exception {
442 if (Thread.currentThread().isInterrupted()) {
443 throw new InterruptedException();
444 }
445 this.socket = socket;
446 tagReader = new XmlReader();
447 if (tagWriter != null) {
448 tagWriter.forceClose();
449 }
450 tagWriter = new TagWriter();
451 tagWriter.setOutputStream(socket.getOutputStream());
452 tagReader.setInputStream(socket.getInputStream());
453 tagWriter.beginDocument();
454 sendStartStream();
455 final Tag tag = tagReader.readTag();
456 return tag != null && tag.isStart("stream");
457 }
458
459 private TlsFactoryVerifier getTlsFactoryVerifier() throws NoSuchAlgorithmException, KeyManagementException, IOException {
460 final SSLContext sc = SSLSocketHelper.getSSLContext();
461 MemorizingTrustManager trustManager = this.mXmppConnectionService.getMemorizingTrustManager();
462 KeyManager[] keyManager;
463 if (account.getPrivateKeyAlias() != null && account.getPassword().isEmpty()) {
464 keyManager = new KeyManager[]{new MyKeyManager()};
465 } else {
466 keyManager = null;
467 }
468 String domain = account.getJid().getDomain();
469 sc.init(keyManager, new X509TrustManager[]{mInteractive ? trustManager.getInteractive(domain) : trustManager.getNonInteractive(domain)}, mXmppConnectionService.getRNG());
470 final SSLSocketFactory factory = sc.getSocketFactory();
471 final DomainHostnameVerifier verifier = trustManager.wrapHostnameVerifier(new XmppDomainVerifier(), mInteractive);
472 return new TlsFactoryVerifier(factory, verifier);
473 }
474
475 @Override
476 public void run() {
477 synchronized (this) {
478 this.mThread = Thread.currentThread();
479 if (this.mThread.isInterrupted()) {
480 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": aborting connect because thread was interrupted");
481 return;
482 }
483 forceCloseSocket();
484 }
485 connect();
486 }
487
488 private void processStream() throws XmlPullParserException, IOException, NoSuchAlgorithmException {
489 final CountDownLatch streamCountDownLatch = new CountDownLatch(1);
490 this.mStreamCountDownLatch = streamCountDownLatch;
491 Tag nextTag = tagReader.readTag();
492 while (nextTag != null && !nextTag.isEnd("stream")) {
493 if (nextTag.isStart("error")) {
494 processStreamError(nextTag);
495 } else if (nextTag.isStart("features")) {
496 processStreamFeatures(nextTag);
497 } else if (nextTag.isStart("proceed")) {
498 switchOverToTls(nextTag);
499 } else if (nextTag.isStart("success")) {
500 final String challenge = tagReader.readElement(nextTag).getContent();
501 try {
502 saslMechanism.getResponse(challenge);
503 } catch (final SaslMechanism.AuthenticationException e) {
504 Log.e(Config.LOGTAG, String.valueOf(e));
505 throw new StateChangingException(Account.State.UNAUTHORIZED);
506 }
507 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": logged in");
508 account.setKey(Account.PINNED_MECHANISM_KEY,
509 String.valueOf(saslMechanism.getPriority()));
510 tagReader.reset();
511 sendStartStream();
512 final Tag tag = tagReader.readTag();
513 if (tag != null && tag.isStart("stream")) {
514 processStream();
515 } else {
516 throw new IOException("server didn't restart stream after successful auth");
517 }
518 break;
519 } else if (nextTag.isStart("failure")) {
520 final Element failure = tagReader.readElement(nextTag);
521 if (Namespace.SASL.equals(failure.getNamespace())) {
522 final String text = failure.findChildContent("text");
523 if (failure.hasChild("account-disabled") && text != null) {
524 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(text);
525 if (matcher.find()) {
526 try {
527 URL url = new URL(text.substring(matcher.start(), matcher.end()));
528 if (url.getProtocol().equals("https")) {
529 this.redirectionUrl = url;
530 throw new StateChangingException(Account.State.PAYMENT_REQUIRED);
531 }
532 } catch (MalformedURLException e) {
533 throw new StateChangingException(Account.State.UNAUTHORIZED);
534 }
535 }
536 }
537 throw new StateChangingException(Account.State.UNAUTHORIZED);
538 } else if (Namespace.TLS.equals(failure.getNamespace())) {
539 throw new StateChangingException(Account.State.TLS_ERROR);
540 } else {
541 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
542 }
543 } else if (nextTag.isStart("challenge")) {
544 final String challenge = tagReader.readElement(nextTag).getContent();
545 final Element response = new Element("response", Namespace.SASL);
546 try {
547 response.setContent(saslMechanism.getResponse(challenge));
548 } catch (final SaslMechanism.AuthenticationException e) {
549 // TODO: Send auth abort tag.
550 Log.e(Config.LOGTAG, e.toString());
551 }
552 tagWriter.writeElement(response);
553 } else if (nextTag.isStart("enabled")) {
554 final Element enabled = tagReader.readElement(nextTag);
555 if ("true".equals(enabled.getAttribute("resume"))) {
556 this.streamId = enabled.getAttribute("id");
557 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
558 + ": stream management(" + smVersion
559 + ") enabled (resumable)");
560 } else {
561 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
562 + ": stream management(" + smVersion + ") enabled");
563 }
564 this.stanzasReceived = 0;
565 this.inSmacksSession = true;
566 final RequestPacket r = new RequestPacket(smVersion);
567 tagWriter.writeStanzaAsync(r);
568 } else if (nextTag.isStart("resumed")) {
569 this.inSmacksSession = true;
570 this.isBound = true;
571 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
572 lastPacketReceived = SystemClock.elapsedRealtime();
573 final Element resumed = tagReader.readElement(nextTag);
574 final String h = resumed.getAttribute("h");
575 try {
576 ArrayList<AbstractAcknowledgeableStanza> failedStanzas = new ArrayList<>();
577 synchronized (this.mStanzaQueue) {
578 final int serverCount = Integer.parseInt(h);
579 if (serverCount < stanzasSent) {
580 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString()
581 + ": session resumed with lost packages");
582 stanzasSent = serverCount;
583 } else {
584 Log.d(Config.LOGTAG, account.getJid().asBareJid().toString() + ": session resumed");
585 }
586 acknowledgeStanzaUpTo(serverCount);
587 for (int i = 0; i < this.mStanzaQueue.size(); ++i) {
588 failedStanzas.add(mStanzaQueue.valueAt(i));
589 }
590 mStanzaQueue.clear();
591 }
592 Log.d(Config.LOGTAG, "resending " + failedStanzas.size() + " stanzas");
593 for (AbstractAcknowledgeableStanza packet : failedStanzas) {
594 if (packet instanceof MessagePacket) {
595 MessagePacket message = (MessagePacket) packet;
596 mXmppConnectionService.markMessage(account,
597 message.getTo().asBareJid(),
598 message.getId(),
599 Message.STATUS_UNSEND);
600 }
601 sendPacket(packet);
602 }
603 } catch (final NumberFormatException ignored) {
604 }
605 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
606 changeStatus(Account.State.ONLINE);
607 } else if (nextTag.isStart("r")) {
608 tagReader.readElement(nextTag);
609 if (Config.EXTENDED_SM_LOGGING) {
610 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
611 }
612 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
613 tagWriter.writeStanzaAsync(ack);
614 } else if (nextTag.isStart("a")) {
615 boolean accountUiNeedsRefresh = false;
616 synchronized (NotificationService.CATCHUP_LOCK) {
617 if (mWaitingForSmCatchup.compareAndSet(true, false)) {
618 int count = mSmCatchupMessageCounter.get();
619 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": SM catchup complete (" + count + ")");
620 accountUiNeedsRefresh = true;
621 if (count > 0) {
622 mXmppConnectionService.getNotificationService().finishBacklog(true, account);
623 }
624 }
625 }
626 if (accountUiNeedsRefresh) {
627 mXmppConnectionService.updateAccountUi();
628 }
629 final Element ack = tagReader.readElement(nextTag);
630 lastPacketReceived = SystemClock.elapsedRealtime();
631 try {
632 synchronized (this.mStanzaQueue) {
633 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
634 acknowledgeStanzaUpTo(serverSequence);
635 }
636 } catch (NumberFormatException | NullPointerException e) {
637 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server send ack without sequence number");
638 }
639 } else if (nextTag.isStart("failed")) {
640 Element failed = tagReader.readElement(nextTag);
641 try {
642 final int serverCount = Integer.parseInt(failed.getAttribute("h"));
643 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed but server acknowledged stanza #" + serverCount);
644 synchronized (this.mStanzaQueue) {
645 acknowledgeStanzaUpTo(serverCount);
646 }
647 } catch (NumberFormatException | NullPointerException e) {
648 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resumption failed");
649 }
650 resetStreamId();
651 sendBindRequest();
652 } else if (nextTag.isStart("iq")) {
653 processIq(nextTag);
654 } else if (nextTag.isStart("message")) {
655 processMessage(nextTag);
656 } else if (nextTag.isStart("presence")) {
657 processPresence(nextTag);
658 }
659 nextTag = tagReader.readTag();
660 }
661 if (nextTag != null && nextTag.isEnd("stream")) {
662 streamCountDownLatch.countDown();
663 }
664 }
665
666 private void acknowledgeStanzaUpTo(int serverCount) {
667 if (serverCount > stanzasSent) {
668 Log.e(Config.LOGTAG, "server acknowledged more stanzas than we sent. serverCount=" + serverCount + ", ourCount=" + stanzasSent);
669 }
670 for (int i = 0; i < mStanzaQueue.size(); ++i) {
671 if (serverCount >= mStanzaQueue.keyAt(i)) {
672 if (Config.EXTENDED_SM_LOGGING) {
673 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server acknowledged stanza #" + mStanzaQueue.keyAt(i));
674 }
675 AbstractAcknowledgeableStanza stanza = mStanzaQueue.valueAt(i);
676 if (stanza instanceof MessagePacket && acknowledgedListener != null) {
677 MessagePacket packet = (MessagePacket) stanza;
678 acknowledgedListener.onMessageAcknowledged(account, packet.getId());
679 }
680 mStanzaQueue.removeAt(i);
681 i--;
682 }
683 }
684 }
685
686 private @NonNull
687 Element processPacket(final Tag currentTag, final int packetType) throws XmlPullParserException, IOException {
688 Element element;
689 switch (packetType) {
690 case PACKET_IQ:
691 element = new IqPacket();
692 break;
693 case PACKET_MESSAGE:
694 element = new MessagePacket();
695 break;
696 case PACKET_PRESENCE:
697 element = new PresencePacket();
698 break;
699 default:
700 throw new AssertionError("Should never encounter invalid type");
701 }
702 element.setAttributes(currentTag.getAttributes());
703 Tag nextTag = tagReader.readTag();
704 if (nextTag == null) {
705 throw new IOException("interrupted mid tag");
706 }
707 while (!nextTag.isEnd(element.getName())) {
708 if (!nextTag.isNo()) {
709 final Element child = tagReader.readElement(nextTag);
710 final String type = currentTag.getAttribute("type");
711 if (packetType == PACKET_IQ
712 && "jingle".equals(child.getName())
713 && ("set".equalsIgnoreCase(type) || "get"
714 .equalsIgnoreCase(type))) {
715 element = new JinglePacket();
716 element.setAttributes(currentTag.getAttributes());
717 }
718 element.addChild(child);
719 }
720 nextTag = tagReader.readTag();
721 if (nextTag == null) {
722 throw new IOException("interrupted mid tag");
723 }
724 }
725 if (stanzasReceived == Integer.MAX_VALUE) {
726 resetStreamId();
727 throw new IOException("time to restart the session. cant handle >2 billion pcks");
728 }
729 if (inSmacksSession) {
730 ++stanzasReceived;
731 } else if (features.sm()) {
732 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": not counting stanza(" + element.getClass().getSimpleName() + "). Not in smacks session.");
733 }
734 lastPacketReceived = SystemClock.elapsedRealtime();
735 if (Config.BACKGROUND_STANZA_LOGGING && mXmppConnectionService.checkListeners()) {
736 Log.d(Config.LOGTAG, "[background stanza] " + element);
737 }
738 return element;
739 }
740
741 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
742 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
743 if (!packet.valid()) {
744 Log.e(Config.LOGTAG, "encountered invalid iq from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
745 return;
746 }
747 if (packet instanceof JinglePacket) {
748 if (this.jingleListener != null) {
749 this.jingleListener.onJinglePacketReceived(account, (JinglePacket) packet);
750 }
751 } else {
752 OnIqPacketReceived callback = null;
753 synchronized (this.packetCallbacks) {
754 if (packetCallbacks.containsKey(packet.getId())) {
755 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
756 // Packets to the server should have responses from the server
757 if (packetCallbackDuple.first.toServer(account)) {
758 if (packet.fromServer(account)) {
759 callback = packetCallbackDuple.second;
760 packetCallbacks.remove(packet.getId());
761 } else {
762 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
763 }
764 } else {
765 if (packet.getFrom() != null && packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
766 callback = packetCallbackDuple.second;
767 packetCallbacks.remove(packet.getId());
768 } else {
769 Log.e(Config.LOGTAG, account.getJid().asBareJid().toString() + ": ignoring spoofed iq packet");
770 }
771 }
772 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
773 callback = this.unregisteredIqListener;
774 }
775 }
776 if (callback != null) {
777 try {
778 callback.onIqPacketReceived(account, packet);
779 } catch (StateChangingError error) {
780 throw new StateChangingException(error.state);
781 }
782 }
783 }
784 }
785
786 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
787 final MessagePacket packet = (MessagePacket) processPacket(currentTag, PACKET_MESSAGE);
788 if (!packet.valid()) {
789 Log.e(Config.LOGTAG, "encountered invalid message from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
790 return;
791 }
792 this.messageListener.onMessagePacketReceived(account, packet);
793 }
794
795 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
796 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
797 if (!packet.valid()) {
798 Log.e(Config.LOGTAG, "encountered invalid presence from='" + packet.getFrom() + "' to='" + packet.getTo() + "'");
799 return;
800 }
801 this.presenceListener.onPresencePacketReceived(account, packet);
802 }
803
804 private void sendStartTLS() throws IOException {
805 final Tag startTLS = Tag.empty("starttls");
806 startTLS.setAttribute("xmlns", Namespace.TLS);
807 tagWriter.writeTag(startTLS);
808 }
809
810 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
811 tagReader.readTag();
812 try {
813 final TlsFactoryVerifier tlsFactoryVerifier = getTlsFactoryVerifier();
814 final InetAddress address = socket == null ? null : socket.getInetAddress();
815
816 if (address == null) {
817 throw new IOException("could not setup ssl");
818 }
819
820 final SSLSocket sslSocket = (SSLSocket) tlsFactoryVerifier.factory.createSocket(socket, address.getHostAddress(), socket.getPort(), true);
821
822 if (sslSocket == null) {
823 throw new IOException("could not initialize ssl socket");
824 }
825
826 SSLSocketHelper.setSecurity(sslSocket);
827
828 if (!tlsFactoryVerifier.verifier.verify(account.getServer(), this.verifiedHostname, sslSocket.getSession())) {
829 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
830 throw new StateChangingException(Account.State.TLS_ERROR);
831 }
832 tagReader.setInputStream(sslSocket.getInputStream());
833 tagWriter.setOutputStream(sslSocket.getOutputStream());
834 sendStartStream();
835 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS connection established");
836 features.encryptionEnabled = true;
837 final Tag tag = tagReader.readTag();
838 if (tag != null && tag.isStart("stream")) {
839 processStream();
840 } else {
841 throw new IOException("server didn't restart stream after STARTTLS");
842 }
843 sslSocket.close();
844 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
845 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": TLS certificate verification failed");
846 throw new StateChangingException(Account.State.TLS_ERROR);
847 }
848 }
849
850 private void processStreamFeatures(final Tag currentTag) throws XmlPullParserException, IOException {
851 this.streamFeatures = tagReader.readElement(currentTag);
852 final boolean isSecure = features.encryptionEnabled || Config.ALLOW_NON_TLS_CONNECTIONS;
853 final boolean needsBinding = !isBound && !account.isOptionSet(Account.OPTION_REGISTER);
854 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
855 sendStartTLS();
856 } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
857 if (isSecure) {
858 sendRegistryRequest();
859 } else {
860 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
861 }
862 } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) {
863 throw new StateChangingException(Account.State.REGISTRATION_NOT_SUPPORTED);
864 } else if (this.streamFeatures.hasChild("mechanisms") && shouldAuthenticate && isSecure) {
865 authenticate();
866 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) {
867 if (Config.EXTENDED_SM_LOGGING) {
868 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": resuming after stanza #" + stanzasReceived);
869 }
870 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
871 this.mSmCatchupMessageCounter.set(0);
872 this.mWaitingForSmCatchup.set(true);
873 this.tagWriter.writeStanzaAsync(resume);
874 } else if (needsBinding) {
875 if (this.streamFeatures.hasChild("bind") && isSecure) {
876 sendBindRequest();
877 } else {
878 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
879 }
880 }
881 }
882
883 private void authenticate() throws IOException {
884 final List<String> mechanisms = extractMechanisms(streamFeatures
885 .findChild("mechanisms"));
886 final Element auth = new Element("auth", Namespace.SASL);
887 if (mechanisms.contains("EXTERNAL") && account.getPrivateKeyAlias() != null) {
888 saslMechanism = new External(tagWriter, account, mXmppConnectionService.getRNG());
889 } else if (mechanisms.contains("SCRAM-SHA-256")) {
890 saslMechanism = new ScramSha256(tagWriter, account, mXmppConnectionService.getRNG());
891 } else if (mechanisms.contains("SCRAM-SHA-1")) {
892 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
893 } else if (mechanisms.contains("PLAIN") && !account.getJid().getDomain().equals("nimbuzz.com")) {
894 saslMechanism = new Plain(tagWriter, account);
895 } else if (mechanisms.contains("DIGEST-MD5")) {
896 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
897 } else if (mechanisms.contains("ANONYMOUS")) {
898 saslMechanism = new Anonymous(tagWriter, account, mXmppConnectionService.getRNG());
899 }
900 if (saslMechanism != null) {
901 final int pinnedMechanism = account.getKeyAsInt(Account.PINNED_MECHANISM_KEY, -1);
902 if (pinnedMechanism > saslMechanism.getPriority()) {
903 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
904 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
905 ") than pinned priority (" + pinnedMechanism +
906 "). Possible downgrade attack?");
907 throw new StateChangingException(Account.State.DOWNGRADE_ATTACK);
908 }
909 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
910 auth.setAttribute("mechanism", saslMechanism.getMechanism());
911 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
912 auth.setContent(saslMechanism.getClientFirstMessage());
913 }
914 tagWriter.writeElement(auth);
915 } else {
916 throw new StateChangingException(Account.State.INCOMPATIBLE_SERVER);
917 }
918 }
919
920 private List<String> extractMechanisms(final Element stream) {
921 final ArrayList<String> mechanisms = new ArrayList<>(stream
922 .getChildren().size());
923 for (final Element child : stream.getChildren()) {
924 mechanisms.add(child.getContent());
925 }
926 return mechanisms;
927 }
928
929 private void sendRegistryRequest() {
930 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
931 register.query("jabber:iq:register");
932 register.setTo(Jid.of(account.getServer()));
933 sendUnmodifiedIqPacket(register, (account, packet) -> {
934 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
935 return;
936 }
937 if (packet.getType() == IqPacket.TYPE.ERROR) {
938 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
939 }
940 final Element query = packet.query("jabber:iq:register");
941 if (query.hasChild("username") && (query.hasChild("password"))) {
942 final IqPacket register1 = new IqPacket(IqPacket.TYPE.SET);
943 final Element username = new Element("username").setContent(account.getUsername());
944 final Element password = new Element("password").setContent(account.getPassword());
945 register1.query("jabber:iq:register").addChild(username);
946 register1.query().addChild(password);
947 register1.setFrom(account.getJid().asBareJid());
948 sendUnmodifiedIqPacket(register1, registrationResponseListener, true);
949 } else if (query.hasChild("x", Namespace.DATA)) {
950 final Data data = Data.parse(query.findChild("x", Namespace.DATA));
951 final Element blob = query.findChild("data", "urn:xmpp:bob");
952 final String id = packet.getId();
953 InputStream is;
954 if (blob != null) {
955 try {
956 final String base64Blob = blob.getContent();
957 final byte[] strBlob = Base64.decode(base64Blob, Base64.DEFAULT);
958 is = new ByteArrayInputStream(strBlob);
959 } catch (Exception e) {
960 is = null;
961 }
962 } else {
963 try {
964 Field field = data.getFieldByName("url");
965 URL url = field != null && field.getValue() != null ? new URL(field.getValue()) : null;
966 is = url != null ? url.openStream() : null;
967 } catch (IOException e) {
968 is = null;
969 }
970 }
971
972 if (is != null) {
973 Bitmap captcha = BitmapFactory.decodeStream(is);
974 try {
975 if (mXmppConnectionService.displayCaptchaRequest(account, id, data, captcha)) {
976 return;
977 }
978 } catch (Exception e) {
979 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
980 }
981 }
982 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
983 } else if (query.hasChild("instructions") || query.hasChild("x", Namespace.OOB)) {
984 final String instructions = query.findChildContent("instructions");
985 final Element oob = query.findChild("x", Namespace.OOB);
986 final String url = oob == null ? null : oob.findChildContent("url");
987 if (url != null) {
988 setAccountCreationFailed(url);
989 } else if (instructions != null) {
990 Matcher matcher = Patterns.AUTOLINK_WEB_URL.matcher(instructions);
991 if (matcher.find()) {
992 setAccountCreationFailed(instructions.substring(matcher.start(), matcher.end()));
993 }
994 }
995 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
996 }
997 }, true);
998 }
999
1000 private void setAccountCreationFailed(String url) {
1001 if (url != null) {
1002 try {
1003 this.redirectionUrl = new URL(url);
1004 if (this.redirectionUrl.getProtocol().equals("https")) {
1005 throw new StateChangingError(Account.State.REGISTRATION_WEB);
1006 }
1007 } catch (MalformedURLException e) {
1008 //fall through
1009 }
1010 }
1011 throw new StateChangingError(Account.State.REGISTRATION_FAILED);
1012 }
1013
1014 public URL getRedirectionUrl() {
1015 return this.redirectionUrl;
1016 }
1017
1018 public void resetEverything() {
1019 resetAttemptCount(true);
1020 resetStreamId();
1021 clearIqCallbacks();
1022 this.stanzasSent = 0;
1023 mStanzaQueue.clear();
1024 this.redirectionUrl = null;
1025 synchronized (this.disco) {
1026 disco.clear();
1027 }
1028 }
1029
1030 private void sendBindRequest() {
1031 try {
1032 mXmppConnectionService.restoredFromDatabaseLatch.await();
1033 } catch (InterruptedException e) {
1034 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while waiting for DB restore during bind");
1035 return;
1036 }
1037 clearIqCallbacks();
1038 if (account.getJid().isBareJid()) {
1039 account.setResource(this.createNewResource());
1040 } else {
1041 fixResource(mXmppConnectionService, account);
1042 }
1043 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1044 final String resource = Config.USE_RANDOM_RESOURCE_ON_EVERY_BIND ? nextRandomId() : account.getResource();
1045 iq.addChild("bind", Namespace.BIND).addChild("resource").setContent(resource);
1046 this.sendUnmodifiedIqPacket(iq, (account, packet) -> {
1047 if (packet.getType() == IqPacket.TYPE.TIMEOUT) {
1048 return;
1049 }
1050 final Element bind = packet.findChild("bind");
1051 if (bind != null && packet.getType() == IqPacket.TYPE.RESULT) {
1052 isBound = true;
1053 final Element jid = bind.findChild("jid");
1054 if (jid != null && jid.getContent() != null) {
1055 try {
1056 Jid assignedJid = Jid.ofEscaped(jid.getContent());
1057 if (!account.getJid().getDomain().equals(assignedJid.getDomain())) {
1058 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server tried to re-assign domain to " + assignedJid.getDomain());
1059 throw new StateChangingError(Account.State.BIND_FAILURE);
1060 }
1061 if (account.setJid(assignedJid)) {
1062 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": jid changed during bind. updating database");
1063 mXmppConnectionService.databaseBackend.updateAccount(account);
1064 }
1065 if (streamFeatures.hasChild("session")
1066 && !streamFeatures.findChild("session").hasChild("optional")) {
1067 sendStartSession();
1068 } else {
1069 sendPostBindInitialization();
1070 }
1071 return;
1072 } catch (final IllegalArgumentException e) {
1073 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server reported invalid jid (" + jid.getContent() + ") on bind");
1074 }
1075 } else {
1076 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure. (no jid)");
1077 }
1078 } else {
1079 Log.d(Config.LOGTAG, account.getJid() + ": disconnecting because of bind failure (" + packet.toString());
1080 }
1081 final Element error = packet.findChild("error");
1082 if (packet.getType() == IqPacket.TYPE.ERROR && error != null && error.hasChild("conflict")) {
1083 account.setResource(createNewResource());
1084 }
1085 throw new StateChangingError(Account.State.BIND_FAILURE);
1086 }, true);
1087 }
1088
1089 private void clearIqCallbacks() {
1090 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.TIMEOUT);
1091 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
1092 synchronized (this.packetCallbacks) {
1093 if (this.packetCallbacks.size() == 0) {
1094 return;
1095 }
1096 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": clearing " + this.packetCallbacks.size() + " iq callbacks");
1097 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
1098 while (iterator.hasNext()) {
1099 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
1100 callbacks.add(entry.second);
1101 iterator.remove();
1102 }
1103 }
1104 for (OnIqPacketReceived callback : callbacks) {
1105 try {
1106 callback.onIqPacketReceived(account, failurePacket);
1107 } catch (StateChangingError error) {
1108 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": caught StateChangingError(" + error.state.toString() + ") while clearing callbacks");
1109 //ignore
1110 }
1111 }
1112 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": done clearing iq callbacks. " + this.packetCallbacks.size() + " left");
1113 }
1114
1115 public void sendDiscoTimeout() {
1116 if (mWaitForDisco.compareAndSet(true, false)) {
1117 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": finalizing bind after disco timeout");
1118 finalizeBind();
1119 }
1120 }
1121
1122 private void sendStartSession() {
1123 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": sending legacy session to outdated server");
1124 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
1125 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
1126 this.sendUnmodifiedIqPacket(startSession, (account, packet) -> {
1127 if (packet.getType() == IqPacket.TYPE.RESULT) {
1128 sendPostBindInitialization();
1129 } else if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1130 throw new StateChangingError(Account.State.SESSION_FAILURE);
1131 }
1132 }, true);
1133 }
1134
1135 private void sendPostBindInitialization() {
1136 smVersion = 0;
1137 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
1138 smVersion = 3;
1139 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
1140 smVersion = 2;
1141 }
1142 if (smVersion != 0) {
1143 synchronized (this.mStanzaQueue) {
1144 final EnablePacket enable = new EnablePacket(smVersion);
1145 tagWriter.writeStanzaAsync(enable);
1146 stanzasSent = 0;
1147 mStanzaQueue.clear();
1148 }
1149 }
1150 features.carbonsEnabled = false;
1151 features.blockListRequested = false;
1152 synchronized (this.disco) {
1153 this.disco.clear();
1154 }
1155 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": starting service discovery");
1156 mPendingServiceDiscoveries.set(0);
1157 if (smVersion == 0 || Patches.DISCO_EXCEPTIONS.contains(account.getJid().getDomain())) {
1158 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": do not wait for service discovery");
1159 mWaitForDisco.set(false);
1160 } else {
1161 mWaitForDisco.set(true);
1162 }
1163 lastDiscoStarted = SystemClock.elapsedRealtime();
1164 mXmppConnectionService.scheduleWakeUpCall(Config.CONNECT_DISCO_TIMEOUT, account.getUuid().hashCode());
1165 Element caps = streamFeatures.findChild("c");
1166 final String hash = caps == null ? null : caps.getAttribute("hash");
1167 final String ver = caps == null ? null : caps.getAttribute("ver");
1168 ServiceDiscoveryResult discoveryResult = null;
1169 if (hash != null && ver != null) {
1170 discoveryResult = mXmppConnectionService.getCachedServiceDiscoveryResult(new Pair<>(hash, ver));
1171 }
1172 final boolean requestDiscoItemsFirst = !account.isOptionSet(Account.OPTION_LOGGED_IN_SUCCESSFULLY);
1173 if (requestDiscoItemsFirst) {
1174 sendServiceDiscoveryItems(Jid.of(account.getServer()));
1175 }
1176 if (discoveryResult == null) {
1177 sendServiceDiscoveryInfo(Jid.of(account.getServer()));
1178 } else {
1179 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": server caps came from cache");
1180 disco.put(Jid.of(account.getServer()), discoveryResult);
1181 }
1182 sendServiceDiscoveryInfo(account.getJid().asBareJid());
1183 if (!requestDiscoItemsFirst) {
1184 sendServiceDiscoveryItems(Jid.of(account.getServer()));
1185 }
1186
1187 if (!mWaitForDisco.get()) {
1188 finalizeBind();
1189 }
1190 this.lastSessionStarted = SystemClock.elapsedRealtime();
1191 }
1192
1193 private void sendServiceDiscoveryInfo(final Jid jid) {
1194 mPendingServiceDiscoveries.incrementAndGet();
1195 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1196 iq.setTo(jid);
1197 iq.query("http://jabber.org/protocol/disco#info");
1198 this.sendIqPacket(iq, (account, packet) -> {
1199 if (packet.getType() == IqPacket.TYPE.RESULT) {
1200 boolean advancedStreamFeaturesLoaded;
1201 synchronized (XmppConnection.this.disco) {
1202 ServiceDiscoveryResult result = new ServiceDiscoveryResult(packet);
1203 if (jid.equals(Jid.of(account.getServer()))) {
1204 mXmppConnectionService.databaseBackend.insertDiscoveryResult(result);
1205 }
1206 disco.put(jid, result);
1207 advancedStreamFeaturesLoaded = disco.containsKey(Jid.of(account.getServer()))
1208 && disco.containsKey(account.getJid().asBareJid());
1209 }
1210 if (advancedStreamFeaturesLoaded && (jid.equals(Jid.of(account.getServer())) || jid.equals(account.getJid().asBareJid()))) {
1211 enableAdvancedStreamFeatures();
1212 }
1213 } else {
1214 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco info for " + jid.toString());
1215 }
1216 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1217 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1218 && mWaitForDisco.compareAndSet(true, false)) {
1219 finalizeBind();
1220 }
1221 }
1222 });
1223 }
1224
1225 private void finalizeBind() {
1226 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": online with resource " + account.getResource());
1227 if (bindListener != null) {
1228 bindListener.onBind(account);
1229 }
1230 changeStatus(Account.State.ONLINE);
1231 }
1232
1233 private void enableAdvancedStreamFeatures() {
1234 if (getFeatures().carbons() && !features.carbonsEnabled) {
1235 sendEnableCarbons();
1236 }
1237 if (getFeatures().blocking() && !features.blockListRequested) {
1238 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": Requesting block list");
1239 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
1240 }
1241 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
1242 listener.onAdvancedStreamFeaturesAvailable(account);
1243 }
1244 }
1245
1246 private void sendServiceDiscoveryItems(final Jid server) {
1247 mPendingServiceDiscoveries.incrementAndGet();
1248 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1249 iq.setTo(Jid.ofDomain(server.getDomain()));
1250 iq.query("http://jabber.org/protocol/disco#items");
1251 this.sendIqPacket(iq, (account, packet) -> {
1252 if (packet.getType() == IqPacket.TYPE.RESULT) {
1253 HashSet<Jid> items = new HashSet<Jid>();
1254 final List<Element> elements = packet.query().getChildren();
1255 for (final Element element : elements) {
1256 if (element.getName().equals("item")) {
1257 final Jid jid = InvalidJid.getNullForInvalid(element.getAttributeAsJid("jid"));
1258 if (jid != null && !jid.equals(Jid.of(account.getServer()))) {
1259 items.add(jid);
1260 }
1261 }
1262 }
1263 for (Jid jid : items) {
1264 sendServiceDiscoveryInfo(jid);
1265 }
1266 } else {
1267 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": could not query disco items of " + server);
1268 }
1269 if (packet.getType() != IqPacket.TYPE.TIMEOUT) {
1270 if (mPendingServiceDiscoveries.decrementAndGet() == 0
1271 && mWaitForDisco.compareAndSet(true, false)) {
1272 finalizeBind();
1273 }
1274 }
1275 });
1276 }
1277
1278 private void sendEnableCarbons() {
1279 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
1280 iq.addChild("enable", "urn:xmpp:carbons:2");
1281 this.sendIqPacket(iq, new OnIqPacketReceived() {
1282
1283 @Override
1284 public void onIqPacketReceived(final Account account, final IqPacket packet) {
1285 if (!packet.hasChild("error")) {
1286 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1287 + ": successfully enabled carbons");
1288 features.carbonsEnabled = true;
1289 } else {
1290 Log.d(Config.LOGTAG, account.getJid().asBareJid()
1291 + ": error enableing carbons " + packet.toString());
1292 }
1293 }
1294 });
1295 }
1296
1297 private void processStreamError(final Tag currentTag) throws XmlPullParserException, IOException {
1298 final Element streamError = tagReader.readElement(currentTag);
1299 if (streamError == null) {
1300 return;
1301 }
1302 if (streamError.hasChild("conflict")) {
1303 account.setResource(createNewResource());
1304 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": switching resource due to conflict (" + account.getResource() + ")");
1305 throw new IOException();
1306 } else if (streamError.hasChild("host-unknown")) {
1307 throw new StateChangingException(Account.State.HOST_UNKNOWN);
1308 } else if (streamError.hasChild("policy-violation")) {
1309 throw new StateChangingException(Account.State.POLICY_VIOLATION);
1310 } else {
1311 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": stream error " + streamError.toString());
1312 throw new StateChangingException(Account.State.STREAM_ERROR);
1313 }
1314 }
1315
1316 private void sendStartStream() throws IOException {
1317 final Tag stream = Tag.start("stream:stream");
1318 stream.setAttribute("to", account.getServer());
1319 stream.setAttribute("version", "1.0");
1320 stream.setAttribute("xml:lang", "en");
1321 stream.setAttribute("xmlns", "jabber:client");
1322 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
1323 tagWriter.writeTag(stream);
1324 }
1325
1326 private String createNewResource() {
1327 return mXmppConnectionService.getString(R.string.app_name) + '.' + nextRandomId(true);
1328 }
1329
1330 private String nextRandomId() {
1331 return nextRandomId(false);
1332 }
1333
1334 private String nextRandomId(boolean s) {
1335 return CryptoHelper.random(s ? 3 : 9, mXmppConnectionService.getRNG());
1336 }
1337
1338 public String sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
1339 packet.setFrom(account.getJid());
1340 return this.sendUnmodifiedIqPacket(packet, callback, false);
1341 }
1342
1343 public synchronized String sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback, boolean force) {
1344 if (packet.getId() == null) {
1345 packet.setAttribute("id", nextRandomId());
1346 }
1347 if (callback != null) {
1348 synchronized (this.packetCallbacks) {
1349 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
1350 }
1351 }
1352 this.sendPacket(packet, force);
1353 return packet.getId();
1354 }
1355
1356 public void sendMessagePacket(final MessagePacket packet) {
1357 this.sendPacket(packet);
1358 }
1359
1360 public void sendPresencePacket(final PresencePacket packet) {
1361 this.sendPacket(packet);
1362 }
1363
1364 private synchronized void sendPacket(final AbstractStanza packet) {
1365 sendPacket(packet, false);
1366 }
1367
1368 private synchronized void sendPacket(final AbstractStanza packet, final boolean force) {
1369 if (stanzasSent == Integer.MAX_VALUE) {
1370 resetStreamId();
1371 disconnect(true);
1372 return;
1373 }
1374 synchronized (this.mStanzaQueue) {
1375 if (force || isBound) {
1376 tagWriter.writeStanzaAsync(packet);
1377 } else {
1378 Log.d(Config.LOGTAG, account.getJid().asBareJid() + " do not write stanza to unbound stream " + packet.toString());
1379 }
1380 if (packet instanceof AbstractAcknowledgeableStanza) {
1381 AbstractAcknowledgeableStanza stanza = (AbstractAcknowledgeableStanza) packet;
1382
1383 if (this.mStanzaQueue.size() != 0) {
1384 int currentHighestKey = this.mStanzaQueue.keyAt(this.mStanzaQueue.size() - 1);
1385 if (currentHighestKey != stanzasSent) {
1386 throw new AssertionError("Stanza count messed up");
1387 }
1388 }
1389
1390 ++stanzasSent;
1391 this.mStanzaQueue.append(stanzasSent, stanza);
1392 if (stanza instanceof MessagePacket && stanza.getId() != null && inSmacksSession) {
1393 if (Config.EXTENDED_SM_LOGGING) {
1394 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": requesting ack for message stanza #" + stanzasSent);
1395 }
1396 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
1397 }
1398 }
1399 }
1400 }
1401
1402 public void sendPing() {
1403 if (!r()) {
1404 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
1405 iq.setFrom(account.getJid());
1406 iq.addChild("ping", "urn:xmpp:ping");
1407 this.sendIqPacket(iq, null);
1408 }
1409 this.lastPingSent = SystemClock.elapsedRealtime();
1410 }
1411
1412 public void setOnMessagePacketReceivedListener(
1413 final OnMessagePacketReceived listener) {
1414 this.messageListener = listener;
1415 }
1416
1417 public void setOnUnregisteredIqPacketReceivedListener(
1418 final OnIqPacketReceived listener) {
1419 this.unregisteredIqListener = listener;
1420 }
1421
1422 public void setOnPresencePacketReceivedListener(
1423 final OnPresencePacketReceived listener) {
1424 this.presenceListener = listener;
1425 }
1426
1427 public void setOnJinglePacketReceivedListener(
1428 final OnJinglePacketReceived listener) {
1429 this.jingleListener = listener;
1430 }
1431
1432 public void setOnStatusChangedListener(final OnStatusChanged listener) {
1433 this.statusListener = listener;
1434 }
1435
1436 public void setOnBindListener(final OnBindListener listener) {
1437 this.bindListener = listener;
1438 }
1439
1440 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1441 this.acknowledgedListener = listener;
1442 }
1443
1444 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1445 this.advancedStreamFeaturesLoadedListeners.add(listener);
1446 }
1447
1448 private void forceCloseSocket() {
1449 if (socket != null) {
1450 try {
1451 socket.close();
1452 } catch (IOException e) {
1453 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception " + e.getMessage() + " during force close");
1454 }
1455 } else {
1456 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": socket was null during force close");
1457 }
1458 }
1459
1460 public void interrupt() {
1461 if (this.mThread != null) {
1462 this.mThread.interrupt();
1463 }
1464 }
1465
1466 public void disconnect(final boolean force) {
1467 interrupt();
1468 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": disconnecting force=" + Boolean.toString(force));
1469 if (force) {
1470 forceCloseSocket();
1471 } else {
1472 final TagWriter currentTagWriter = this.tagWriter;
1473 if (currentTagWriter.isActive()) {
1474 currentTagWriter.finish();
1475 final Socket currentSocket = this.socket;
1476 final CountDownLatch streamCountDownLatch = this.mStreamCountDownLatch;
1477 try {
1478 currentTagWriter.await(1, TimeUnit.SECONDS);
1479 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": closing stream");
1480 currentTagWriter.writeTag(Tag.end("stream:stream"));
1481 if (streamCountDownLatch != null) {
1482 if (streamCountDownLatch.await(1, TimeUnit.SECONDS)) {
1483 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote ended stream");
1484 } else {
1485 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": remote has not closed socket. force closing");
1486 }
1487 }
1488 } catch (InterruptedException e) {
1489 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": interrupted while gracefully closing stream");
1490 } catch (final IOException e) {
1491 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": io exception during disconnect (" + e.getMessage() + ")");
1492 } finally {
1493 FileBackend.close(currentSocket);
1494 }
1495 } else {
1496 forceCloseSocket();
1497 }
1498 }
1499 }
1500
1501 private void resetStreamId() {
1502 this.streamId = null;
1503 }
1504
1505 private List<Entry<Jid, ServiceDiscoveryResult>> findDiscoItemsByFeature(final String feature) {
1506 synchronized (this.disco) {
1507 final List<Entry<Jid, ServiceDiscoveryResult>> items = new ArrayList<>();
1508 for (final Entry<Jid, ServiceDiscoveryResult> cursor : this.disco.entrySet()) {
1509 if (cursor.getValue().getFeatures().contains(feature)) {
1510 items.add(cursor);
1511 }
1512 }
1513 return items;
1514 }
1515 }
1516
1517 public Jid findDiscoItemByFeature(final String feature) {
1518 final List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(feature);
1519 if (items.size() >= 1) {
1520 return items.get(0).getKey();
1521 }
1522 return null;
1523 }
1524
1525 public boolean r() {
1526 if (getFeatures().sm()) {
1527 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1528 return true;
1529 } else {
1530 return false;
1531 }
1532 }
1533
1534 public List<String> getMucServersWithholdAccount() {
1535 List<String> servers = getMucServers();
1536 servers.remove(account.getServer());
1537 return servers;
1538 }
1539
1540 public List<String> getMucServers() {
1541 List<String> servers = new ArrayList<>();
1542 synchronized (this.disco) {
1543 for (final Entry<Jid, ServiceDiscoveryResult> cursor : disco.entrySet()) {
1544 final ServiceDiscoveryResult value = cursor.getValue();
1545 if (value.getFeatures().contains("http://jabber.org/protocol/muc")
1546 && value.hasIdentity("conference", "text")
1547 && !value.getFeatures().contains("jabber:iq:gateway")
1548 && !value.hasIdentity("conference", "irc")) {
1549 servers.add(cursor.getKey().toString());
1550 }
1551 }
1552 }
1553 return servers;
1554 }
1555
1556 public String getMucServer() {
1557 List<String> servers = getMucServers();
1558 return servers.size() > 0 ? servers.get(0) : null;
1559 }
1560
1561 public int getTimeToNextAttempt() {
1562 final int interval = Math.min((int) (25 * Math.pow(1.3, attempt)), 300);
1563 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1564 return interval - secondsSinceLast;
1565 }
1566
1567 public int getAttempt() {
1568 return this.attempt;
1569 }
1570
1571 public Features getFeatures() {
1572 return this.features;
1573 }
1574
1575 public long getLastSessionEstablished() {
1576 final long diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1577 return System.currentTimeMillis() - diff;
1578 }
1579
1580 public long getLastConnect() {
1581 return this.lastConnect;
1582 }
1583
1584 public long getLastPingSent() {
1585 return this.lastPingSent;
1586 }
1587
1588 public long getLastDiscoStarted() {
1589 return this.lastDiscoStarted;
1590 }
1591
1592 public long getLastPacketReceived() {
1593 return this.lastPacketReceived;
1594 }
1595
1596 public void sendActive() {
1597 this.sendPacket(new ActivePacket());
1598 }
1599
1600 public void sendInactive() {
1601 this.sendPacket(new InactivePacket());
1602 }
1603
1604 public void resetAttemptCount(boolean resetConnectTime) {
1605 this.attempt = 0;
1606 if (resetConnectTime) {
1607 this.lastConnect = 0;
1608 }
1609 }
1610
1611 public void setInteractive(boolean interactive) {
1612 this.mInteractive = interactive;
1613 }
1614
1615 public Identity getServerIdentity() {
1616 synchronized (this.disco) {
1617 ServiceDiscoveryResult result = disco.get(Jid.ofDomain(account.getJid().getDomain()));
1618 if (result == null) {
1619 return Identity.UNKNOWN;
1620 }
1621 for (final ServiceDiscoveryResult.Identity id : result.getIdentities()) {
1622 if (id.getType().equals("im") && id.getCategory().equals("server") && id.getName() != null) {
1623 switch (id.getName()) {
1624 case "Prosody":
1625 return Identity.PROSODY;
1626 case "ejabberd":
1627 return Identity.EJABBERD;
1628 case "Slack-XMPP":
1629 return Identity.SLACK;
1630 }
1631 }
1632 }
1633 }
1634 return Identity.UNKNOWN;
1635 }
1636
1637 private IqGenerator getIqGenerator() {
1638 return mXmppConnectionService.getIqGenerator();
1639 }
1640
1641 public enum Identity {
1642 FACEBOOK,
1643 SLACK,
1644 EJABBERD,
1645 PROSODY,
1646 NIMBUZZ,
1647 UNKNOWN
1648 }
1649
1650 private static class TlsFactoryVerifier {
1651 private final SSLSocketFactory factory;
1652 private final DomainHostnameVerifier verifier;
1653
1654 TlsFactoryVerifier(final SSLSocketFactory factory, final DomainHostnameVerifier verifier) throws IOException {
1655 this.factory = factory;
1656 this.verifier = verifier;
1657 if (factory == null || verifier == null) {
1658 throw new IOException("could not setup ssl");
1659 }
1660 }
1661 }
1662
1663 private class MyKeyManager implements X509KeyManager {
1664 @Override
1665 public String chooseClientAlias(String[] strings, Principal[] principals, Socket socket) {
1666 return account.getPrivateKeyAlias();
1667 }
1668
1669 @Override
1670 public String chooseServerAlias(String s, Principal[] principals, Socket socket) {
1671 return null;
1672 }
1673
1674 @Override
1675 public X509Certificate[] getCertificateChain(String alias) {
1676 Log.d(Config.LOGTAG, "getting certificate chain");
1677 try {
1678 return KeyChain.getCertificateChain(mXmppConnectionService, alias);
1679 } catch (Exception e) {
1680 Log.d(Config.LOGTAG, e.getMessage());
1681 return new X509Certificate[0];
1682 }
1683 }
1684
1685 @Override
1686 public String[] getClientAliases(String s, Principal[] principals) {
1687 final String alias = account.getPrivateKeyAlias();
1688 return alias != null ? new String[]{alias} : new String[0];
1689 }
1690
1691 @Override
1692 public String[] getServerAliases(String s, Principal[] principals) {
1693 return new String[0];
1694 }
1695
1696 @Override
1697 public PrivateKey getPrivateKey(String alias) {
1698 try {
1699 return KeyChain.getPrivateKey(mXmppConnectionService, alias);
1700 } catch (Exception e) {
1701 return null;
1702 }
1703 }
1704 }
1705
1706 private class StateChangingError extends Error {
1707 private final Account.State state;
1708
1709 public StateChangingError(Account.State state) {
1710 this.state = state;
1711 }
1712 }
1713
1714 private class StateChangingException extends IOException {
1715 private final Account.State state;
1716
1717 public StateChangingException(Account.State state) {
1718 this.state = state;
1719 }
1720 }
1721
1722 public class Features {
1723 XmppConnection connection;
1724 private boolean carbonsEnabled = false;
1725 private boolean encryptionEnabled = false;
1726 private boolean blockListRequested = false;
1727
1728 public Features(final XmppConnection connection) {
1729 this.connection = connection;
1730 }
1731
1732 private boolean hasDiscoFeature(final Jid server, final String feature) {
1733 synchronized (XmppConnection.this.disco) {
1734 return connection.disco.containsKey(server) &&
1735 connection.disco.get(server).getFeatures().contains(feature);
1736 }
1737 }
1738
1739 public boolean carbons() {
1740 return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:carbons:2");
1741 }
1742
1743 public boolean blocking() {
1744 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.BLOCKING);
1745 }
1746
1747 public boolean spamReporting() {
1748 return hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:reporting:reason:spam:0");
1749 }
1750
1751 public boolean flexibleOfflineMessageRetrieval() {
1752 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.FLEXIBLE_OFFLINE_MESSAGE_RETRIEVAL);
1753 }
1754
1755 public boolean register() {
1756 return hasDiscoFeature(Jid.of(account.getServer()), Namespace.REGISTER);
1757 }
1758
1759 public boolean sm() {
1760 return streamId != null
1761 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1762 }
1763
1764 public boolean csi() {
1765 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1766 }
1767
1768 public boolean pep() {
1769 synchronized (XmppConnection.this.disco) {
1770 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1771 return info != null && info.hasIdentity("pubsub", "pep");
1772 }
1773 }
1774
1775 public boolean pepPersistent() {
1776 synchronized (XmppConnection.this.disco) {
1777 ServiceDiscoveryResult info = disco.get(account.getJid().asBareJid());
1778 return info != null && info.getFeatures().contains("http://jabber.org/protocol/pubsub#persistent-items");
1779 }
1780 }
1781
1782 public boolean pepPublishOptions() {
1783 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.PUBSUB_PUBLISH_OPTIONS);
1784 }
1785
1786 public boolean pepOmemoWhitelisted() {
1787 return hasDiscoFeature(account.getJid().asBareJid(), AxolotlService.PEP_OMEMO_WHITELISTED);
1788 }
1789
1790 public boolean mam() {
1791 return MessageArchiveService.Version.has(getAccountFeatures());
1792 }
1793
1794 public List<String> getAccountFeatures() {
1795 ServiceDiscoveryResult result = connection.disco.get(account.getJid().asBareJid());
1796 return result == null ? Collections.emptyList() : result.getFeatures();
1797 }
1798
1799 public boolean push() {
1800 return hasDiscoFeature(account.getJid().asBareJid(), "urn:xmpp:push:0")
1801 || hasDiscoFeature(Jid.of(account.getServer()), "urn:xmpp:push:0");
1802 }
1803
1804 public boolean rosterVersioning() {
1805 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1806 }
1807
1808 public void setBlockListRequested(boolean value) {
1809 this.blockListRequested = value;
1810 }
1811
1812 public boolean p1S3FileTransfer() {
1813 return hasDiscoFeature(Jid.of(account.getServer()),Namespace.P1_S3_FILE_TRANSFER);
1814 }
1815
1816 public boolean httpUpload(long filesize) {
1817 if (Config.DISABLE_HTTP_UPLOAD) {
1818 return false;
1819 } else {
1820 for(String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1821 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1822 if (items.size() > 0) {
1823 try {
1824 long maxsize = Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1825 if (filesize <= maxsize) {
1826 return true;
1827 } else {
1828 Log.d(Config.LOGTAG, account.getJid().asBareJid() + ": http upload is not available for files with size " + filesize + " (max is " + maxsize + ")");
1829 return false;
1830 }
1831 } catch (Exception e) {
1832 return true;
1833 }
1834 }
1835 }
1836 return false;
1837 }
1838 }
1839
1840 public boolean useLegacyHttpUpload() {
1841 return findDiscoItemByFeature(Namespace.HTTP_UPLOAD) == null && findDiscoItemByFeature(Namespace.HTTP_UPLOAD_LEGACY) != null;
1842 }
1843
1844 public long getMaxHttpUploadSize() {
1845 for(String namespace : new String[]{Namespace.HTTP_UPLOAD, Namespace.HTTP_UPLOAD_LEGACY}) {
1846 List<Entry<Jid, ServiceDiscoveryResult>> items = findDiscoItemsByFeature(namespace);
1847 if (items.size() > 0) {
1848 try {
1849 return Long.parseLong(items.get(0).getValue().getExtendedDiscoInformation(namespace, "max-file-size"));
1850 } catch (Exception e) {
1851 //ignored
1852 }
1853 }
1854 }
1855 return -1;
1856 }
1857
1858 public boolean stanzaIds() {
1859 return hasDiscoFeature(account.getJid().asBareJid(), Namespace.STANZA_IDS);
1860 }
1861 }
1862}