1package eu.siacs.conversations.xmpp;
2
3import android.content.Context;
4import android.content.SharedPreferences;
5import android.os.Bundle;
6import android.os.Parcelable;
7import android.os.PowerManager;
8import android.os.PowerManager.WakeLock;
9import android.os.SystemClock;
10import android.preference.PreferenceManager;
11import android.util.Log;
12import android.util.SparseArray;
13
14import org.apache.http.conn.ssl.StrictHostnameVerifier;
15import org.json.JSONException;
16import org.json.JSONObject;
17import org.xmlpull.v1.XmlPullParserException;
18
19import java.io.IOException;
20import java.io.InputStream;
21import java.io.OutputStream;
22import java.math.BigInteger;
23import java.net.ConnectException;
24import java.net.IDN;
25import java.net.InetAddress;
26import java.net.InetSocketAddress;
27import java.net.Socket;
28import java.net.UnknownHostException;
29import java.security.KeyManagementException;
30import java.security.NoSuchAlgorithmException;
31import java.util.ArrayList;
32import java.util.Arrays;
33import java.util.Collection;
34import java.util.HashMap;
35import java.util.Hashtable;
36import java.util.LinkedList;
37import java.util.List;
38import java.util.Map;
39import java.util.Map.Entry;
40
41import javax.net.ssl.HostnameVerifier;
42import javax.net.ssl.SSLContext;
43import javax.net.ssl.SSLSocket;
44import javax.net.ssl.SSLSocketFactory;
45import javax.net.ssl.X509TrustManager;
46
47import eu.siacs.conversations.Config;
48import eu.siacs.conversations.crypto.sasl.DigestMd5;
49import eu.siacs.conversations.crypto.sasl.Plain;
50import eu.siacs.conversations.crypto.sasl.SaslMechanism;
51import eu.siacs.conversations.crypto.sasl.ScramSha1;
52import eu.siacs.conversations.entities.Account;
53import eu.siacs.conversations.generator.IqGenerator;
54import eu.siacs.conversations.services.XmppConnectionService;
55import eu.siacs.conversations.utils.DNSHelper;
56import eu.siacs.conversations.utils.Xmlns;
57import eu.siacs.conversations.xml.Element;
58import eu.siacs.conversations.xml.Tag;
59import eu.siacs.conversations.xml.TagWriter;
60import eu.siacs.conversations.xml.XmlReader;
61import eu.siacs.conversations.xmpp.jid.InvalidJidException;
62import eu.siacs.conversations.xmpp.jid.Jid;
63import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
64import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
65import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
66import eu.siacs.conversations.xmpp.stanzas.IqPacket;
67import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
68import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
69import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
70import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
71import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
72import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
73import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
74import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
75
76public class XmppConnection implements Runnable {
77
78 private static final int PACKET_IQ = 0;
79 private static final int PACKET_MESSAGE = 1;
80 private static final int PACKET_PRESENCE = 2;
81 private final Context applicationContext;
82 protected Account account;
83 private final WakeLock wakeLock;
84 private Socket socket;
85 private XmlReader tagReader;
86 private TagWriter tagWriter;
87 private final Features features = new Features(this);
88 private boolean shouldBind = true;
89 private boolean shouldAuthenticate = true;
90 private Element streamFeatures;
91 private final HashMap<String, List<String>> disco = new HashMap<>();
92
93 private String streamId = null;
94 private int smVersion = 3;
95 private final SparseArray<String> messageReceipts = new SparseArray<>();
96
97 private boolean enabledEncryption = false;
98 private boolean enabledCarbons = false;
99
100 private int stanzasReceived = 0;
101 private int stanzasSent = 0;
102 private long lastPaketReceived = 0;
103 private long lastPingSent = 0;
104 private long lastConnect = 0;
105 private long lastSessionStarted = 0;
106 private int attempt = 0;
107 private final Map<String, PacketReceived> packetCallbacks = new Hashtable<>();
108 private OnPresencePacketReceived presenceListener = null;
109 private OnJinglePacketReceived jingleListener = null;
110 private OnIqPacketReceived unregisteredIqListener = null;
111 private OnMessagePacketReceived messageListener = null;
112 private OnStatusChanged statusListener = null;
113 private OnBindListener bindListener = null;
114 private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
115 private OnMessageAcknowledged acknowledgedListener = null;
116 private XmppConnectionService mXmppConnectionService = null;
117
118 private SaslMechanism saslMechanism;
119
120 public XmppConnection(final Account account, final XmppConnectionService service) {
121 this.account = account;
122 this.wakeLock = service.getPowerManager().newWakeLock(
123 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
124 tagWriter = new TagWriter();
125 mXmppConnectionService = service;
126 applicationContext = service.getApplicationContext();
127 }
128
129 protected void changeStatus(final Account.State nextStatus) {
130 if (account.getStatus() != nextStatus) {
131 if ((nextStatus == Account.State.OFFLINE)
132 && (account.getStatus() != Account.State.CONNECTING)
133 && (account.getStatus() != Account.State.ONLINE)
134 && (account.getStatus() != Account.State.DISABLED)) {
135 return;
136 }
137 if (nextStatus == Account.State.ONLINE) {
138 this.attempt = 0;
139 }
140 account.setStatus(nextStatus);
141 if (statusListener != null) {
142 statusListener.onStatusChanged(account);
143 }
144 }
145 }
146
147 protected void connect() {
148 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
149 enabledEncryption = false;
150 lastConnect = SystemClock.elapsedRealtime();
151 lastPingSent = SystemClock.elapsedRealtime();
152 this.attempt++;
153 try {
154 shouldAuthenticate = shouldBind = !account
155 .isOptionSet(Account.OPTION_REGISTER);
156 tagReader = new XmlReader(wakeLock);
157 tagWriter = new TagWriter();
158 packetCallbacks.clear();
159 this.changeStatus(Account.State.CONNECTING);
160 final Bundle result = DNSHelper.getSRVRecord(account.getServer());
161 final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
162 if ("timeout".equals(result.getString("error"))) {
163 throw new IOException("timeout in dns");
164 } else if (values != null) {
165 int i = 0;
166 boolean socketError = true;
167 while (socketError && values.size() > i) {
168 final Bundle namePort = (Bundle) values.get(i);
169 try {
170 String srvRecordServer;
171 try {
172 srvRecordServer=IDN.toASCII(namePort.getString("name"));
173 } catch (final IllegalArgumentException e) {
174 // TODO: Handle me?`
175 srvRecordServer = "";
176 }
177 final int srvRecordPort = namePort.getInt("port");
178 final String srvIpServer = namePort.getString("ip");
179 final InetSocketAddress addr;
180 if (srvIpServer != null) {
181 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
182 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
183 + ": using values from dns " + srvRecordServer
184 + "[" + srvIpServer + "]:" + srvRecordPort);
185 } else {
186 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
187 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
188 + ": using values from dns "
189 + srvRecordServer + ":" + srvRecordPort);
190 }
191 socket = new Socket();
192 socket.connect(addr, 20000);
193 socketError = false;
194 } catch (final UnknownHostException e) {
195 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
196 i++;
197 } catch (final IOException e) {
198 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
199 i++;
200 }
201 }
202 if (socketError) {
203 throw new UnknownHostException();
204 }
205 } else if (result.containsKey("error")
206 && "nosrv".equals(result.getString("error", null))) {
207 socket = new Socket(account.getServer().getDomainpart(), 5222);
208 } else {
209 throw new IOException("timeout in dns");
210 }
211 final OutputStream out = socket.getOutputStream();
212 tagWriter.setOutputStream(out);
213 final InputStream in = socket.getInputStream();
214 tagReader.setInputStream(in);
215 tagWriter.beginDocument();
216 sendStartStream();
217 Tag nextTag;
218 while ((nextTag = tagReader.readTag()) != null) {
219 if (nextTag.isStart("stream")) {
220 processStream(nextTag);
221 break;
222 } else {
223 throw new IOException("unknown tag on connect");
224 }
225 }
226 if (socket.isConnected()) {
227 socket.close();
228 }
229 } catch (final UnknownHostException | ConnectException e) {
230 this.changeStatus(Account.State.SERVER_NOT_FOUND);
231 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
232 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
233 this.changeStatus(Account.State.OFFLINE);
234 } finally {
235 if (wakeLock.isHeld()) {
236 try {
237 wakeLock.release();
238 } catch (final RuntimeException ignored) {
239 }
240 }
241 }
242 }
243
244 @Override
245 public void run() {
246 connect();
247 }
248
249 private void processStream(final Tag currentTag) throws XmlPullParserException,
250 IOException, NoSuchAlgorithmException {
251 Tag nextTag = tagReader.readTag();
252
253 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
254 if (nextTag.isStart("error")) {
255 processStreamError(nextTag);
256 } else if (nextTag.isStart("features")) {
257 processStreamFeatures(nextTag);
258 } else if (nextTag.isStart("proceed")) {
259 switchOverToTls(nextTag);
260 } else if (nextTag.isStart("success")) {
261 final String challenge = tagReader.readElement(nextTag).getContent();
262 try {
263 saslMechanism.getResponse(challenge);
264 } catch (final SaslMechanism.AuthenticationException e) {
265 disconnect(true);
266 Log.e(Config.LOGTAG, String.valueOf(e));
267 }
268 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
269 account.setKey(Account.PINNED_MECHANISM_KEY,
270 String.valueOf(saslMechanism.getPriority()));
271 tagReader.reset();
272 sendStartStream();
273 processStream(tagReader.readTag());
274 break;
275 } else if (nextTag.isStart("failure")) {
276 tagReader.readElement(nextTag);
277 changeStatus(Account.State.UNAUTHORIZED);
278 } else if (nextTag.isStart("challenge")) {
279 final String challenge = tagReader.readElement(nextTag).getContent();
280 final Element response = new Element("response");
281 response.setAttribute("xmlns",
282 "urn:ietf:params:xml:ns:xmpp-sasl");
283 try {
284 response.setContent(saslMechanism.getResponse(challenge));
285 } catch (final SaslMechanism.AuthenticationException e) {
286 // TODO: Send auth abort tag.
287 Log.e(Config.LOGTAG, e.toString());
288 }
289 tagWriter.writeElement(response);
290 } else if (nextTag.isStart("enabled")) {
291 final Element enabled = tagReader.readElement(nextTag);
292 if ("true".equals(enabled.getAttribute("resume"))) {
293 this.streamId = enabled.getAttribute("id");
294 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
295 + ": stream managment(" + smVersion
296 + ") enabled (resumable)");
297 } else {
298 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
299 + ": stream managment(" + smVersion + ") enabled");
300 }
301 this.lastSessionStarted = SystemClock.elapsedRealtime();
302 this.stanzasReceived = 0;
303 final RequestPacket r = new RequestPacket(smVersion);
304 tagWriter.writeStanzaAsync(r);
305 } else if (nextTag.isStart("resumed")) {
306 lastPaketReceived = SystemClock.elapsedRealtime();
307 final Element resumed = tagReader.readElement(nextTag);
308 final String h = resumed.getAttribute("h");
309 try {
310 final int serverCount = Integer.parseInt(h);
311 if (serverCount != stanzasSent) {
312 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
313 + ": session resumed with lost packages");
314 stanzasSent = serverCount;
315 } else {
316 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
317 + ": session resumed");
318 }
319 if (acknowledgedListener != null) {
320 for (int i = 0; i < messageReceipts.size(); ++i) {
321 if (serverCount >= messageReceipts.keyAt(i)) {
322 acknowledgedListener.onMessageAcknowledged(
323 account, messageReceipts.valueAt(i));
324 }
325 }
326 }
327 messageReceipts.clear();
328 } catch (final NumberFormatException ignored) {
329 }
330 sendServiceDiscoveryInfo(account.getServer());
331 sendServiceDiscoveryItems(account.getServer());
332 sendInitialPing();
333 } else if (nextTag.isStart("r")) {
334 tagReader.readElement(nextTag);
335 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
336 tagWriter.writeStanzaAsync(ack);
337 } else if (nextTag.isStart("a")) {
338 final Element ack = tagReader.readElement(nextTag);
339 lastPaketReceived = SystemClock.elapsedRealtime();
340 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
341 final String msgId = this.messageReceipts.get(serverSequence);
342 if (msgId != null) {
343 if (this.acknowledgedListener != null) {
344 this.acknowledgedListener.onMessageAcknowledged(
345 account, msgId);
346 }
347 this.messageReceipts.remove(serverSequence);
348 }
349 } else if (nextTag.isStart("failed")) {
350 tagReader.readElement(nextTag);
351 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
352 streamId = null;
353 if (account.getStatus() != Account.State.ONLINE) {
354 sendBindRequest();
355 }
356 } else if (nextTag.isStart("iq")) {
357 processIq(nextTag);
358 } else if (nextTag.isStart("message")) {
359 processMessage(nextTag);
360 } else if (nextTag.isStart("presence")) {
361 processPresence(nextTag);
362 }
363 nextTag = tagReader.readTag();
364 }
365 if (account.getStatus() == Account.State.ONLINE) {
366 account. setStatus(Account.State.OFFLINE);
367 if (statusListener != null) {
368 statusListener.onStatusChanged(account);
369 }
370 }
371 }
372
373 private void sendInitialPing() {
374 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
375 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
376 iq.setFrom(account.getJid());
377 iq.addChild("ping", "urn:xmpp:ping");
378 this.sendIqPacket(iq, new OnIqPacketReceived() {
379 @Override
380 public void onIqPacketReceived(final Account account, final IqPacket packet) {
381 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
382 + ": online with resource " + account.getResource());
383 changeStatus(Account.State.ONLINE);
384 }
385 });
386 }
387
388 private Element processPacket(final Tag currentTag, final int packetType)
389 throws XmlPullParserException, IOException {
390 Element element;
391 switch (packetType) {
392 case PACKET_IQ:
393 element = new IqPacket();
394 break;
395 case PACKET_MESSAGE:
396 element = new MessagePacket();
397 break;
398 case PACKET_PRESENCE:
399 element = new PresencePacket();
400 break;
401 default:
402 return null;
403 }
404 element.setAttributes(currentTag.getAttributes());
405 Tag nextTag = tagReader.readTag();
406 if (nextTag == null) {
407 throw new IOException("interrupted mid tag");
408 }
409 while (!nextTag.isEnd(element.getName())) {
410 if (!nextTag.isNo()) {
411 final Element child = tagReader.readElement(nextTag);
412 final String type = currentTag.getAttribute("type");
413 if (packetType == PACKET_IQ
414 && "jingle".equals(child.getName())
415 && ("set".equalsIgnoreCase(type) || "get"
416 .equalsIgnoreCase(type))) {
417 element = new JinglePacket();
418 element.setAttributes(currentTag.getAttributes());
419 }
420 element.addChild(child);
421 }
422 nextTag = tagReader.readTag();
423 if (nextTag == null) {
424 throw new IOException("interrupted mid tag");
425 }
426 }
427 ++stanzasReceived;
428 lastPaketReceived = SystemClock.elapsedRealtime();
429 return element;
430 }
431
432 private void processIq(final Tag currentTag) throws XmlPullParserException,
433 IOException {
434 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
435
436 if (packet.getId() == null) {
437 return; // an iq packet without id is definitely invalid
438 }
439
440 if (packet instanceof JinglePacket) {
441 if (this.jingleListener != null) {
442 this.jingleListener.onJinglePacketReceived(account,
443 (JinglePacket) packet);
444 }
445 } else {
446 if (packetCallbacks.containsKey(packet.getId())) {
447 if (packetCallbacks.get(packet.getId()) instanceof OnIqPacketReceived) {
448 ((OnIqPacketReceived) packetCallbacks.get(packet.getId()))
449 .onIqPacketReceived(account, packet);
450 }
451
452 packetCallbacks.remove(packet.getId());
453 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
454 .getType() == IqPacket.TYPE_SET)
455 && this.unregisteredIqListener != null) {
456 this.unregisteredIqListener.onIqPacketReceived(account, packet);
457 }
458 }
459 }
460
461 private void processMessage(final Tag currentTag) throws XmlPullParserException,
462 IOException {
463 final MessagePacket packet = (MessagePacket) processPacket(currentTag,
464 PACKET_MESSAGE);
465 final String id = packet.getAttribute("id");
466 if ((id != null) && (packetCallbacks.containsKey(id))) {
467 if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
468 ((OnMessagePacketReceived) packetCallbacks.get(id))
469 .onMessagePacketReceived(account, packet);
470 }
471 packetCallbacks.remove(id);
472 } else if (this.messageListener != null) {
473 this.messageListener.onMessagePacketReceived(account, packet);
474 }
475 }
476
477 private void processPresence(final Tag currentTag) throws XmlPullParserException,
478 IOException {
479 PresencePacket packet = (PresencePacket) processPacket(currentTag,
480 PACKET_PRESENCE);
481 final String id = packet.getAttribute("id");
482 if ((id != null) && (packetCallbacks.containsKey(id))) {
483 if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
484 ((OnPresencePacketReceived) packetCallbacks.get(id))
485 .onPresencePacketReceived(account, packet);
486 }
487 packetCallbacks.remove(id);
488 } else if (this.presenceListener != null) {
489 this.presenceListener.onPresencePacketReceived(account, packet);
490 }
491 }
492
493 private void sendStartTLS() throws IOException {
494 final Tag startTLS = Tag.empty("starttls");
495 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
496 tagWriter.writeTag(startTLS);
497 }
498
499 private SharedPreferences getPreferences() {
500 return PreferenceManager
501 .getDefaultSharedPreferences(applicationContext);
502 }
503
504 private boolean enableLegacySSL() {
505 return getPreferences().getBoolean("enable_legacy_ssl", false);
506 }
507
508 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException,
509 IOException {
510 tagReader.readTag();
511 try {
512 final SSLContext sc = SSLContext.getInstance("TLS");
513 sc.init(null,
514 new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},
515 mXmppConnectionService.getRNG());
516 final SSLSocketFactory factory = sc.getSocketFactory();
517
518 if (factory == null) {
519 throw new IOException("SSLSocketFactory was null");
520 }
521
522 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
523
524 if (socket == null || socket.isClosed()) {
525 throw new IOException("socket null or closed");
526 }
527 final InetAddress address = socket.getInetAddress();
528 if (address == null) {
529 throw new IOException("socket address was null");
530 }
531
532 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
533
534 // Support all protocols except legacy SSL.
535 // The min SDK version prevents us having to worry about SSLv2. In
536 // future, this may be true of SSLv3 as well.
537 final String[] supportProtocols;
538 if (enableLegacySSL()) {
539 supportProtocols = sslSocket.getSupportedProtocols();
540 } else {
541 final Collection<String> supportedProtocols = new LinkedList<>(
542 Arrays.asList(sslSocket.getSupportedProtocols()));
543 supportedProtocols.remove("SSLv3");
544 supportProtocols = new String[supportedProtocols.size()];
545 supportedProtocols.toArray(supportProtocols);
546 }
547 sslSocket.setEnabledProtocols(supportProtocols);
548
549 if (verifier != null
550 && !verifier.verify(account.getServer().getDomainpart(),
551 sslSocket.getSession())) {
552 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
553 disconnect(true);
554 changeStatus(Account.State.SECURITY_ERROR);
555 }
556 tagReader.setInputStream(sslSocket.getInputStream());
557 tagWriter.setOutputStream(sslSocket.getOutputStream());
558 sendStartStream();
559 Log.d(Config.LOGTAG, account.getJid().toBareJid()
560 + ": TLS connection established");
561 enabledEncryption = true;
562 processStream(tagReader.readTag());
563 sslSocket.close();
564 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
565 e1.printStackTrace();
566 }
567 }
568
569 private void processStreamFeatures(final Tag currentTag)
570 throws XmlPullParserException, IOException {
571 this.streamFeatures = tagReader.readElement(currentTag);
572 if (this.streamFeatures.hasChild("starttls") && !enabledEncryption) {
573 sendStartTLS();
574 } else if (this.streamFeatures.hasChild("register")
575 && account.isOptionSet(Account.OPTION_REGISTER)
576 && enabledEncryption) {
577 sendRegistryRequest();
578 } else if (!this.streamFeatures.hasChild("register")
579 && account.isOptionSet(Account.OPTION_REGISTER)) {
580 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
581 disconnect(true);
582 } else if (this.streamFeatures.hasChild("mechanisms")
583 && shouldAuthenticate && enabledEncryption) {
584 final List<String> mechanisms = extractMechanisms(streamFeatures
585 .findChild("mechanisms"));
586 final Element auth = new Element("auth");
587 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
588 if (mechanisms.contains("SCRAM-SHA-1")) {
589 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
590 } else if (mechanisms.contains("DIGEST-MD5")) {
591 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
592 } else if (mechanisms.contains("PLAIN")) {
593 saslMechanism = new Plain(tagWriter, account);
594 }
595 final JSONObject keys = account.getKeys();
596 try {
597 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
598 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority() ) {
599 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
600 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
601 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
602 "). Possible downgrade attack?");
603 disconnect(true);
604 changeStatus(Account.State.SECURITY_ERROR);
605 }
606 } catch (final JSONException e) {
607 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
608 }
609 Log.d(Config.LOGTAG,account.getJid().toString()+": Authenticating with " + saslMechanism.getMechanism());
610 auth.setAttribute("mechanism", saslMechanism.getMechanism());
611 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
612 auth.setContent(saslMechanism.getClientFirstMessage());
613 }
614 tagWriter.writeElement(auth);
615 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
616 + smVersion)
617 && streamId != null) {
618 final ResumePacket resume = new ResumePacket(this.streamId,
619 stanzasReceived, smVersion);
620 this.tagWriter.writeStanzaAsync(resume);
621 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
622 sendBindRequest();
623 } else {
624 disconnect(true);
625 changeStatus(Account.State.INCOMPATIBLE_SERVER);
626 }
627 }
628
629 private List<String> extractMechanisms(final Element stream) {
630 final ArrayList<String> mechanisms = new ArrayList<>(stream
631 .getChildren().size());
632 for (final Element child : stream.getChildren()) {
633 mechanisms.add(child.getContent());
634 }
635 return mechanisms;
636 }
637
638 private void sendRegistryRequest() {
639 final IqPacket register = new IqPacket(IqPacket.TYPE_GET);
640 register.query("jabber:iq:register");
641 register.setTo(account.getServer());
642 sendIqPacket(register, new OnIqPacketReceived() {
643
644 @Override
645 public void onIqPacketReceived(final Account account, final IqPacket packet) {
646 final Element instructions = packet.query().findChild("instructions");
647 if (packet.query().hasChild("username")
648 && (packet.query().hasChild("password"))) {
649 final IqPacket register = new IqPacket(IqPacket.TYPE_SET);
650 final Element username = new Element("username")
651 .setContent(account.getUsername());
652 final Element password = new Element("password")
653 .setContent(account.getPassword());
654 register.query("jabber:iq:register").addChild(username);
655 register.query().addChild(password);
656 sendIqPacket(register, new OnIqPacketReceived() {
657
658 @Override
659 public void onIqPacketReceived(final Account account, final IqPacket packet) {
660 if (packet.getType() == IqPacket.TYPE_RESULT) {
661 account.setOption(Account.OPTION_REGISTER,
662 false);
663 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
664 } else if (packet.hasChild("error")
665 && (packet.findChild("error")
666 .hasChild("conflict"))) {
667 changeStatus(Account.State.REGISTRATION_CONFLICT);
668 } else {
669 changeStatus(Account.State.REGISTRATION_FAILED);
670 Log.d(Config.LOGTAG, packet.toString());
671 }
672 disconnect(true);
673 }
674 });
675 } else {
676 changeStatus(Account.State.REGISTRATION_FAILED);
677 disconnect(true);
678 Log.d(Config.LOGTAG, account.getJid().toBareJid()
679 + ": could not register. instructions are"
680 + instructions.getContent());
681 }
682 }
683 });
684 }
685
686 private void sendBindRequest() {
687 final IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
688 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
689 .addChild("resource").setContent(account.getResource());
690 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
691 @Override
692 public void onIqPacketReceived(final Account account, final IqPacket packet) {
693 final Element bind = packet.findChild("bind");
694 if (bind != null) {
695 final Element jid = bind.findChild("jid");
696 if (jid != null && jid.getContent() != null) {
697 try {
698 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
699 } catch (final InvalidJidException e) {
700 // TODO: Handle the case where an external JID is technically invalid?
701 }
702 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
703 smVersion = 3;
704 final EnablePacket enable = new EnablePacket(smVersion);
705 tagWriter.writeStanzaAsync(enable);
706 stanzasSent = 0;
707 messageReceipts.clear();
708 } else if (streamFeatures.hasChild("sm",
709 "urn:xmpp:sm:2")) {
710 smVersion = 2;
711 final EnablePacket enable = new EnablePacket(smVersion);
712 tagWriter.writeStanzaAsync(enable);
713 stanzasSent = 0;
714 messageReceipts.clear();
715 }
716 enabledCarbons = false;
717 disco.clear();
718 sendServiceDiscoveryInfo(account.getServer());
719 sendServiceDiscoveryItems(account.getServer());
720 if (bindListener != null) {
721 bindListener.onBind(account);
722 }
723 sendInitialPing();
724 } else {
725 disconnect(true);
726 }
727 } else {
728 disconnect(true);
729 }
730 }
731 });
732 if (this.streamFeatures.hasChild("session")) {
733 Log.d(Config.LOGTAG, account.getJid().toBareJid()
734 + ": sending deprecated session");
735 final IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
736 startSession.addChild("session",
737 "urn:ietf:params:xml:ns:xmpp-session");
738 this.sendUnboundIqPacket(startSession, null);
739 }
740 }
741
742 private void sendServiceDiscoveryInfo(final Jid server) {
743 if (disco.containsKey(server.toDomainJid().toString())) {
744 if (account.getServer().equals(server.toDomainJid())) {
745 enableAdvancedStreamFeatures();
746 }
747 } else {
748 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
749 iq.setTo(server.toDomainJid());
750 iq.query("http://jabber.org/protocol/disco#info");
751 this.sendIqPacket(iq, new OnIqPacketReceived() {
752
753 @Override
754 public void onIqPacketReceived(final Account account, final IqPacket packet) {
755 final List<Element> elements = packet.query().getChildren();
756 final List<String> features = new ArrayList<>();
757 for (final Element element : elements) {
758 if (element.getName().equals("identity")) {
759 if ("irc".equals(element.getAttribute("type"))) {
760 //add fake feature to not confuse irc and real muc
761 features.add("siacs:no:muc");
762 }
763 } else if (element.getName().equals("feature")) {
764 features.add(element.getAttribute("var"));
765 }
766 }
767 disco.put(server.toDomainJid().toString(), features);
768
769 if (account.getServer().equals(server.toDomainJid())) {
770 enableAdvancedStreamFeatures();
771 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
772 listener.onAdvancedStreamFeaturesAvailable(account);
773 }
774 }
775 }
776 });
777 }
778 }
779
780 private void enableAdvancedStreamFeatures() {
781 if (getFeatures().carbons()) {
782 if (!enabledCarbons) {
783 sendEnableCarbons();
784 }
785 }
786 if (getFeatures().blocking()) {
787 Log.d(Config.LOGTAG, "Requesting block list");
788 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
789 }
790 }
791
792 private void sendServiceDiscoveryItems(final Jid server) {
793 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
794 iq.setTo(server.toDomainJid());
795 iq.query("http://jabber.org/protocol/disco#items");
796 this.sendIqPacket(iq, new OnIqPacketReceived() {
797
798 @Override
799 public void onIqPacketReceived(final Account account, final IqPacket packet) {
800 final List<Element> elements = packet.query().getChildren();
801 for (final Element element : elements) {
802 if (element.getName().equals("item")) {
803 final Jid jid = element.getAttributeAsJid("jid");
804 if (jid != null && !jid.equals(account.getServer())) {
805 sendServiceDiscoveryInfo(jid);
806 }
807 }
808 }
809 }
810 });
811 }
812
813 private void sendEnableCarbons() {
814 final IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
815 iq.addChild("enable", "urn:xmpp:carbons:2");
816 this.sendIqPacket(iq, new OnIqPacketReceived() {
817
818 @Override
819 public void onIqPacketReceived(final Account account, final IqPacket packet) {
820 if (!packet.hasChild("error")) {
821 Log.d(Config.LOGTAG, account.getJid().toBareJid()
822 + ": successfully enabled carbons");
823 enabledCarbons = true;
824 } else {
825 Log.d(Config.LOGTAG, account.getJid().toBareJid()
826 + ": error enableing carbons " + packet.toString());
827 }
828 }
829 });
830 }
831
832 private void processStreamError(final Tag currentTag)
833 throws XmlPullParserException, IOException {
834 final Element streamError = tagReader.readElement(currentTag);
835 if (streamError != null && streamError.hasChild("conflict")) {
836 final String resource = account.getResource().split("\\.")[0];
837 account.setResource(resource + "." + nextRandomId());
838 Log.d(Config.LOGTAG,
839 account.getJid().toBareJid() + ": switching resource due to conflict ("
840 + account.getResource() + ")");
841 }
842 }
843
844 private void sendStartStream() throws IOException {
845 final Tag stream = Tag.start("stream:stream");
846 stream.setAttribute("from", account.getJid().toBareJid().toString());
847 stream.setAttribute("to", account.getServer().toString());
848 stream.setAttribute("version", "1.0");
849 stream.setAttribute("xml:lang", "en");
850 stream.setAttribute("xmlns", "jabber:client");
851 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
852 tagWriter.writeTag(stream);
853 }
854
855 private String nextRandomId() {
856 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
857 }
858
859 public void sendIqPacket(final IqPacket packet, final PacketReceived callback) {
860 if (packet.getId() == null) {
861 final String id = nextRandomId();
862 packet.setAttribute("id", id);
863 }
864 packet.setFrom(account.getJid());
865 this.sendPacket(packet, callback);
866 }
867
868 public void sendUnboundIqPacket(final IqPacket packet, final PacketReceived callback) {
869 if (packet.getId() == null) {
870 final String id = nextRandomId();
871 packet.setAttribute("id", id);
872 }
873 this.sendPacket(packet, callback);
874 }
875
876 public void sendMessagePacket(final MessagePacket packet) {
877 this.sendPacket(packet, null);
878 }
879
880 public void sendPresencePacket(final PresencePacket packet) {
881 this.sendPacket(packet, null);
882 }
883
884 private synchronized void sendPacket(final AbstractStanza packet, final PacketReceived callback) {
885 if (packet.getName().equals("iq") || packet.getName().equals("message")
886 || packet.getName().equals("presence")) {
887 ++stanzasSent;
888 }
889 tagWriter.writeStanzaAsync(packet);
890 if (packet instanceof MessagePacket && packet.getId() != null
891 && this.streamId != null) {
892 Log.d(Config.LOGTAG, "request delivery report for stanza "
893 + stanzasSent);
894 this.messageReceipts.put(stanzasSent, packet.getId());
895 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
896 }
897 if (callback != null) {
898 if (packet.getId() == null) {
899 packet.setId(nextRandomId());
900 }
901 packetCallbacks.put(packet.getId(), callback);
902 }
903 }
904
905 public void sendPing() {
906 if (streamFeatures.hasChild("sm")) {
907 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
908 } else {
909 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
910 iq.setFrom(account.getJid());
911 iq.addChild("ping", "urn:xmpp:ping");
912 this.sendIqPacket(iq, null);
913 }
914 this.lastPingSent = SystemClock.elapsedRealtime();
915 }
916
917 public void setOnMessagePacketReceivedListener(
918 final OnMessagePacketReceived listener) {
919 this.messageListener = listener;
920 }
921
922 public void setOnUnregisteredIqPacketReceivedListener(
923 final OnIqPacketReceived listener) {
924 this.unregisteredIqListener = listener;
925 }
926
927 public void setOnPresencePacketReceivedListener(
928 final OnPresencePacketReceived listener) {
929 this.presenceListener = listener;
930 }
931
932 public void setOnJinglePacketReceivedListener(
933 final OnJinglePacketReceived listener) {
934 this.jingleListener = listener;
935 }
936
937 public void setOnStatusChangedListener(final OnStatusChanged listener) {
938 this.statusListener = listener;
939 }
940
941 public void setOnBindListener(final OnBindListener listener) {
942 this.bindListener = listener;
943 }
944
945 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
946 this.acknowledgedListener = listener;
947 }
948
949 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
950 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
951 this.advancedStreamFeaturesLoadedListeners.add(listener);
952 }
953 }
954
955 public void disconnect(final boolean force) {
956 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
957 try {
958 if (force) {
959 socket.close();
960 return;
961 }
962 new Thread(new Runnable() {
963
964 @Override
965 public void run() {
966 if (tagWriter.isActive()) {
967 tagWriter.finish();
968 try {
969 while (!tagWriter.finished()) {
970 Log.d(Config.LOGTAG, "not yet finished");
971 Thread.sleep(100);
972 }
973 tagWriter.writeTag(Tag.end("stream:stream"));
974 socket.close();
975 } catch (final IOException e) {
976 Log.d(Config.LOGTAG,
977 "io exception during disconnect");
978 } catch (final InterruptedException e) {
979 Log.d(Config.LOGTAG, "interrupted");
980 }
981 }
982 }
983 }).start();
984 } catch (final IOException e) {
985 Log.d(Config.LOGTAG, "io exception during disconnect");
986 }
987 }
988
989 public List<String> findDiscoItemsByFeature(final String feature) {
990 final List<String> items = new ArrayList<>();
991 for (final Entry<String, List<String>> cursor : disco.entrySet()) {
992 if (cursor.getValue().contains(feature)) {
993 items.add(cursor.getKey());
994 }
995 }
996 return items;
997 }
998
999 public String findDiscoItemByFeature(final String feature) {
1000 final List<String> items = findDiscoItemsByFeature(feature);
1001 if (items.size() >= 1) {
1002 return items.get(0);
1003 }
1004 return null;
1005 }
1006
1007 public void r() {
1008 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1009 }
1010
1011 public String getMucServer() {
1012 for (final Entry<String, List<String>> cursor : disco.entrySet()) {
1013 final List<String> value = cursor.getValue();
1014 if (value.contains("http://jabber.org/protocol/muc") && !value.contains("jabber:iq:gateway") && !value.contains("siacs:no:muc")) {
1015 return cursor.getKey();
1016 }
1017 }
1018 return null;
1019 }
1020
1021 public int getTimeToNextAttempt() {
1022 final int interval = (int) (25 * Math.pow(1.5, attempt));
1023 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1024 return interval - secondsSinceLast;
1025 }
1026
1027 public int getAttempt() {
1028 return this.attempt;
1029 }
1030
1031 public Features getFeatures() {
1032 return this.features;
1033 }
1034
1035 public long getLastSessionEstablished() {
1036 final long diff;
1037 if (this.lastSessionStarted == 0) {
1038 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1039 } else {
1040 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1041 }
1042 return System.currentTimeMillis() - diff;
1043 }
1044
1045 public long getLastConnect() {
1046 return this.lastConnect;
1047 }
1048
1049 public long getLastPingSent() {
1050 return this.lastPingSent;
1051 }
1052
1053 public long getLastPacketReceived() {
1054 return this.lastPaketReceived;
1055 }
1056
1057 public void sendActive() {
1058 this.sendPacket(new ActivePacket(), null);
1059 }
1060
1061 public void sendInactive() {
1062 this.sendPacket(new InactivePacket(), null);
1063 }
1064
1065 public class Features {
1066 XmppConnection connection;
1067
1068 public Features(final XmppConnection connection) {
1069 this.connection = connection;
1070 }
1071
1072 private boolean hasDiscoFeature(final Jid server, final String feature) {
1073 return connection.disco.containsKey(server.toDomainJid().toString()) &&
1074 connection.disco.get(server.toDomainJid().toString()).contains(feature);
1075 }
1076
1077 public boolean carbons() {
1078 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1079 }
1080
1081 public boolean blocking() {
1082 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1083 }
1084
1085 public boolean sm() {
1086 return streamId != null;
1087 }
1088
1089 public boolean csi() {
1090 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1091 }
1092
1093 public boolean pubsub() {
1094 return hasDiscoFeature(account.getServer(),
1095 "http://jabber.org/protocol/pubsub#publish");
1096 }
1097
1098 public boolean mam() {
1099 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1100 }
1101
1102 public boolean advancedStreamFeaturesLoaded() {
1103 return disco.containsKey(account.getServer().toString());
1104 }
1105
1106 public boolean rosterVersioning() {
1107 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1108 }
1109
1110 public boolean streamhost() {
1111 return connection
1112 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1113 }
1114 }
1115
1116 private IqGenerator getIqGenerator() {
1117 return mXmppConnectionService.getIqGenerator();
1118 }
1119}