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, IOException {
509 tagReader.readTag();
510 try {
511 final SSLContext sc = SSLContext.getInstance("TLS");
512 sc.init(null,new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},mXmppConnectionService.getRNG());
513 final SSLSocketFactory factory = sc.getSocketFactory();
514 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
515 final InetAddress address = socket == null ? null : socket.getInetAddress();
516
517 if (factory == null || address == null || verifier == null) {
518 throw new IOException("could not setup ssl");
519 }
520
521 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
522
523 if (sslSocket == null) {
524 throw new IOException("could not initialize ssl socket");
525 }
526
527 final String[] supportProtocols;
528 if (enableLegacySSL()) {
529 supportProtocols = sslSocket.getSupportedProtocols();
530 } else {
531 final Collection<String> supportedProtocols = new LinkedList<>(
532 Arrays.asList(sslSocket.getSupportedProtocols()));
533 supportedProtocols.remove("SSLv3");
534 supportProtocols = new String[supportedProtocols.size()];
535 supportedProtocols.toArray(supportProtocols);
536 }
537 sslSocket.setEnabledProtocols(supportProtocols);
538
539 if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) {
540 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
541 disconnect(true);
542 changeStatus(Account.State.SECURITY_ERROR);
543 }
544 tagReader.setInputStream(sslSocket.getInputStream());
545 tagWriter.setOutputStream(sslSocket.getOutputStream());
546 sendStartStream();
547 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
548 enabledEncryption = true;
549 processStream(tagReader.readTag());
550 sslSocket.close();
551 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
552 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
553 disconnect(true);
554 changeStatus(Account.State.SECURITY_ERROR);
555 }
556 }
557
558 private void processStreamFeatures(final Tag currentTag)
559 throws XmlPullParserException, IOException {
560 this.streamFeatures = tagReader.readElement(currentTag);
561 if (this.streamFeatures.hasChild("starttls") && !enabledEncryption) {
562 sendStartTLS();
563 } else if (this.streamFeatures.hasChild("register")
564 && account.isOptionSet(Account.OPTION_REGISTER)
565 && enabledEncryption) {
566 sendRegistryRequest();
567 } else if (!this.streamFeatures.hasChild("register")
568 && account.isOptionSet(Account.OPTION_REGISTER)) {
569 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
570 disconnect(true);
571 } else if (this.streamFeatures.hasChild("mechanisms")
572 && shouldAuthenticate && enabledEncryption) {
573 final List<String> mechanisms = extractMechanisms(streamFeatures
574 .findChild("mechanisms"));
575 final Element auth = new Element("auth");
576 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
577 if (mechanisms.contains("SCRAM-SHA-1")) {
578 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
579 } else if (mechanisms.contains("DIGEST-MD5")) {
580 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
581 } else if (mechanisms.contains("PLAIN")) {
582 saslMechanism = new Plain(tagWriter, account);
583 }
584 final JSONObject keys = account.getKeys();
585 try {
586 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
587 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority() ) {
588 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
589 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
590 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
591 "). Possible downgrade attack?");
592 disconnect(true);
593 changeStatus(Account.State.SECURITY_ERROR);
594 }
595 } catch (final JSONException e) {
596 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
597 }
598 Log.d(Config.LOGTAG,account.getJid().toString()+": Authenticating with " + saslMechanism.getMechanism());
599 auth.setAttribute("mechanism", saslMechanism.getMechanism());
600 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
601 auth.setContent(saslMechanism.getClientFirstMessage());
602 }
603 tagWriter.writeElement(auth);
604 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
605 + smVersion)
606 && streamId != null) {
607 final ResumePacket resume = new ResumePacket(this.streamId,
608 stanzasReceived, smVersion);
609 this.tagWriter.writeStanzaAsync(resume);
610 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
611 sendBindRequest();
612 } else {
613 disconnect(true);
614 changeStatus(Account.State.INCOMPATIBLE_SERVER);
615 }
616 }
617
618 private List<String> extractMechanisms(final Element stream) {
619 final ArrayList<String> mechanisms = new ArrayList<>(stream
620 .getChildren().size());
621 for (final Element child : stream.getChildren()) {
622 mechanisms.add(child.getContent());
623 }
624 return mechanisms;
625 }
626
627 private void sendRegistryRequest() {
628 final IqPacket register = new IqPacket(IqPacket.TYPE_GET);
629 register.query("jabber:iq:register");
630 register.setTo(account.getServer());
631 sendIqPacket(register, new OnIqPacketReceived() {
632
633 @Override
634 public void onIqPacketReceived(final Account account, final IqPacket packet) {
635 final Element instructions = packet.query().findChild("instructions");
636 if (packet.query().hasChild("username")
637 && (packet.query().hasChild("password"))) {
638 final IqPacket register = new IqPacket(IqPacket.TYPE_SET);
639 final Element username = new Element("username")
640 .setContent(account.getUsername());
641 final Element password = new Element("password")
642 .setContent(account.getPassword());
643 register.query("jabber:iq:register").addChild(username);
644 register.query().addChild(password);
645 sendIqPacket(register, new OnIqPacketReceived() {
646
647 @Override
648 public void onIqPacketReceived(final Account account, final IqPacket packet) {
649 if (packet.getType() == IqPacket.TYPE_RESULT) {
650 account.setOption(Account.OPTION_REGISTER,
651 false);
652 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
653 } else if (packet.hasChild("error")
654 && (packet.findChild("error")
655 .hasChild("conflict"))) {
656 changeStatus(Account.State.REGISTRATION_CONFLICT);
657 } else {
658 changeStatus(Account.State.REGISTRATION_FAILED);
659 Log.d(Config.LOGTAG, packet.toString());
660 }
661 disconnect(true);
662 }
663 });
664 } else {
665 changeStatus(Account.State.REGISTRATION_FAILED);
666 disconnect(true);
667 Log.d(Config.LOGTAG, account.getJid().toBareJid()
668 + ": could not register. instructions are"
669 + instructions.getContent());
670 }
671 }
672 });
673 }
674
675 private void sendBindRequest() {
676 final IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
677 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
678 .addChild("resource").setContent(account.getResource());
679 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
680 @Override
681 public void onIqPacketReceived(final Account account, final IqPacket packet) {
682 final Element bind = packet.findChild("bind");
683 if (bind != null) {
684 final Element jid = bind.findChild("jid");
685 if (jid != null && jid.getContent() != null) {
686 try {
687 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
688 } catch (final InvalidJidException e) {
689 // TODO: Handle the case where an external JID is technically invalid?
690 }
691 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
692 smVersion = 3;
693 final EnablePacket enable = new EnablePacket(smVersion);
694 tagWriter.writeStanzaAsync(enable);
695 stanzasSent = 0;
696 messageReceipts.clear();
697 } else if (streamFeatures.hasChild("sm",
698 "urn:xmpp:sm:2")) {
699 smVersion = 2;
700 final EnablePacket enable = new EnablePacket(smVersion);
701 tagWriter.writeStanzaAsync(enable);
702 stanzasSent = 0;
703 messageReceipts.clear();
704 }
705 enabledCarbons = false;
706 disco.clear();
707 sendServiceDiscoveryInfo(account.getServer());
708 sendServiceDiscoveryItems(account.getServer());
709 if (bindListener != null) {
710 bindListener.onBind(account);
711 }
712 sendInitialPing();
713 } else {
714 disconnect(true);
715 }
716 } else {
717 disconnect(true);
718 }
719 }
720 });
721 if (this.streamFeatures.hasChild("session")) {
722 Log.d(Config.LOGTAG, account.getJid().toBareJid()
723 + ": sending deprecated session");
724 final IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
725 startSession.addChild("session",
726 "urn:ietf:params:xml:ns:xmpp-session");
727 this.sendUnboundIqPacket(startSession, null);
728 }
729 }
730
731 private void sendServiceDiscoveryInfo(final Jid server) {
732 if (disco.containsKey(server.toDomainJid().toString())) {
733 if (account.getServer().equals(server.toDomainJid())) {
734 enableAdvancedStreamFeatures();
735 }
736 } else {
737 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
738 iq.setTo(server.toDomainJid());
739 iq.query("http://jabber.org/protocol/disco#info");
740 this.sendIqPacket(iq, new OnIqPacketReceived() {
741
742 @Override
743 public void onIqPacketReceived(final Account account, final IqPacket packet) {
744 final List<Element> elements = packet.query().getChildren();
745 final List<String> features = new ArrayList<>();
746 for (final Element element : elements) {
747 if (element.getName().equals("identity")) {
748 if ("irc".equals(element.getAttribute("type"))) {
749 //add fake feature to not confuse irc and real muc
750 features.add("siacs:no:muc");
751 }
752 } else if (element.getName().equals("feature")) {
753 features.add(element.getAttribute("var"));
754 }
755 }
756 disco.put(server.toDomainJid().toString(), features);
757
758 if (account.getServer().equals(server.toDomainJid())) {
759 enableAdvancedStreamFeatures();
760 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
761 listener.onAdvancedStreamFeaturesAvailable(account);
762 }
763 }
764 }
765 });
766 }
767 }
768
769 private void enableAdvancedStreamFeatures() {
770 if (getFeatures().carbons()) {
771 if (!enabledCarbons) {
772 sendEnableCarbons();
773 }
774 }
775 if (getFeatures().blocking()) {
776 Log.d(Config.LOGTAG, "Requesting block list");
777 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
778 }
779 }
780
781 private void sendServiceDiscoveryItems(final Jid server) {
782 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
783 iq.setTo(server.toDomainJid());
784 iq.query("http://jabber.org/protocol/disco#items");
785 this.sendIqPacket(iq, new OnIqPacketReceived() {
786
787 @Override
788 public void onIqPacketReceived(final Account account, final IqPacket packet) {
789 final List<Element> elements = packet.query().getChildren();
790 for (final Element element : elements) {
791 if (element.getName().equals("item")) {
792 final Jid jid = element.getAttributeAsJid("jid");
793 if (jid != null && !jid.equals(account.getServer())) {
794 sendServiceDiscoveryInfo(jid);
795 }
796 }
797 }
798 }
799 });
800 }
801
802 private void sendEnableCarbons() {
803 final IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
804 iq.addChild("enable", "urn:xmpp:carbons:2");
805 this.sendIqPacket(iq, new OnIqPacketReceived() {
806
807 @Override
808 public void onIqPacketReceived(final Account account, final IqPacket packet) {
809 if (!packet.hasChild("error")) {
810 Log.d(Config.LOGTAG, account.getJid().toBareJid()
811 + ": successfully enabled carbons");
812 enabledCarbons = true;
813 } else {
814 Log.d(Config.LOGTAG, account.getJid().toBareJid()
815 + ": error enableing carbons " + packet.toString());
816 }
817 }
818 });
819 }
820
821 private void processStreamError(final Tag currentTag)
822 throws XmlPullParserException, IOException {
823 final Element streamError = tagReader.readElement(currentTag);
824 if (streamError != null && streamError.hasChild("conflict")) {
825 final String resource = account.getResource().split("\\.")[0];
826 account.setResource(resource + "." + nextRandomId());
827 Log.d(Config.LOGTAG,
828 account.getJid().toBareJid() + ": switching resource due to conflict ("
829 + account.getResource() + ")");
830 }
831 }
832
833 private void sendStartStream() throws IOException {
834 final Tag stream = Tag.start("stream:stream");
835 stream.setAttribute("from", account.getJid().toBareJid().toString());
836 stream.setAttribute("to", account.getServer().toString());
837 stream.setAttribute("version", "1.0");
838 stream.setAttribute("xml:lang", "en");
839 stream.setAttribute("xmlns", "jabber:client");
840 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
841 tagWriter.writeTag(stream);
842 }
843
844 private String nextRandomId() {
845 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
846 }
847
848 public void sendIqPacket(final IqPacket packet, final PacketReceived callback) {
849 if (packet.getId() == null) {
850 final String id = nextRandomId();
851 packet.setAttribute("id", id);
852 }
853 packet.setFrom(account.getJid());
854 this.sendPacket(packet, callback);
855 }
856
857 public void sendUnboundIqPacket(final IqPacket packet, final PacketReceived callback) {
858 if (packet.getId() == null) {
859 final String id = nextRandomId();
860 packet.setAttribute("id", id);
861 }
862 this.sendPacket(packet, callback);
863 }
864
865 public void sendMessagePacket(final MessagePacket packet) {
866 this.sendPacket(packet, null);
867 }
868
869 public void sendPresencePacket(final PresencePacket packet) {
870 this.sendPacket(packet, null);
871 }
872
873 private synchronized void sendPacket(final AbstractStanza packet, final PacketReceived callback) {
874 if (packet.getName().equals("iq") || packet.getName().equals("message")
875 || packet.getName().equals("presence")) {
876 ++stanzasSent;
877 }
878 tagWriter.writeStanzaAsync(packet);
879 if (packet instanceof MessagePacket && packet.getId() != null
880 && this.streamId != null) {
881 Log.d(Config.LOGTAG, "request delivery report for stanza "
882 + stanzasSent);
883 this.messageReceipts.put(stanzasSent, packet.getId());
884 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
885 }
886 if (callback != null) {
887 if (packet.getId() == null) {
888 packet.setId(nextRandomId());
889 }
890 packetCallbacks.put(packet.getId(), callback);
891 }
892 }
893
894 public void sendPing() {
895 if (streamFeatures.hasChild("sm")) {
896 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
897 } else {
898 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
899 iq.setFrom(account.getJid());
900 iq.addChild("ping", "urn:xmpp:ping");
901 this.sendIqPacket(iq, null);
902 }
903 this.lastPingSent = SystemClock.elapsedRealtime();
904 }
905
906 public void setOnMessagePacketReceivedListener(
907 final OnMessagePacketReceived listener) {
908 this.messageListener = listener;
909 }
910
911 public void setOnUnregisteredIqPacketReceivedListener(
912 final OnIqPacketReceived listener) {
913 this.unregisteredIqListener = listener;
914 }
915
916 public void setOnPresencePacketReceivedListener(
917 final OnPresencePacketReceived listener) {
918 this.presenceListener = listener;
919 }
920
921 public void setOnJinglePacketReceivedListener(
922 final OnJinglePacketReceived listener) {
923 this.jingleListener = listener;
924 }
925
926 public void setOnStatusChangedListener(final OnStatusChanged listener) {
927 this.statusListener = listener;
928 }
929
930 public void setOnBindListener(final OnBindListener listener) {
931 this.bindListener = listener;
932 }
933
934 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
935 this.acknowledgedListener = listener;
936 }
937
938 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
939 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
940 this.advancedStreamFeaturesLoadedListeners.add(listener);
941 }
942 }
943
944 public void disconnect(final boolean force) {
945 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
946 try {
947 if (force) {
948 socket.close();
949 return;
950 }
951 new Thread(new Runnable() {
952
953 @Override
954 public void run() {
955 if (tagWriter.isActive()) {
956 tagWriter.finish();
957 try {
958 while (!tagWriter.finished()) {
959 Log.d(Config.LOGTAG, "not yet finished");
960 Thread.sleep(100);
961 }
962 tagWriter.writeTag(Tag.end("stream:stream"));
963 socket.close();
964 } catch (final IOException e) {
965 Log.d(Config.LOGTAG,
966 "io exception during disconnect");
967 } catch (final InterruptedException e) {
968 Log.d(Config.LOGTAG, "interrupted");
969 }
970 }
971 }
972 }).start();
973 } catch (final IOException e) {
974 Log.d(Config.LOGTAG, "io exception during disconnect");
975 }
976 }
977
978 public List<String> findDiscoItemsByFeature(final String feature) {
979 final List<String> items = new ArrayList<>();
980 for (final Entry<String, List<String>> cursor : disco.entrySet()) {
981 if (cursor.getValue().contains(feature)) {
982 items.add(cursor.getKey());
983 }
984 }
985 return items;
986 }
987
988 public String findDiscoItemByFeature(final String feature) {
989 final List<String> items = findDiscoItemsByFeature(feature);
990 if (items.size() >= 1) {
991 return items.get(0);
992 }
993 return null;
994 }
995
996 public void r() {
997 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
998 }
999
1000 public String getMucServer() {
1001 for (final Entry<String, List<String>> cursor : disco.entrySet()) {
1002 final List<String> value = cursor.getValue();
1003 if (value.contains("http://jabber.org/protocol/muc") && !value.contains("jabber:iq:gateway") && !value.contains("siacs:no:muc")) {
1004 return cursor.getKey();
1005 }
1006 }
1007 return null;
1008 }
1009
1010 public int getTimeToNextAttempt() {
1011 final int interval = (int) (25 * Math.pow(1.5, attempt));
1012 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1013 return interval - secondsSinceLast;
1014 }
1015
1016 public int getAttempt() {
1017 return this.attempt;
1018 }
1019
1020 public Features getFeatures() {
1021 return this.features;
1022 }
1023
1024 public long getLastSessionEstablished() {
1025 final long diff;
1026 if (this.lastSessionStarted == 0) {
1027 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1028 } else {
1029 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1030 }
1031 return System.currentTimeMillis() - diff;
1032 }
1033
1034 public long getLastConnect() {
1035 return this.lastConnect;
1036 }
1037
1038 public long getLastPingSent() {
1039 return this.lastPingSent;
1040 }
1041
1042 public long getLastPacketReceived() {
1043 return this.lastPaketReceived;
1044 }
1045
1046 public void sendActive() {
1047 this.sendPacket(new ActivePacket(), null);
1048 }
1049
1050 public void sendInactive() {
1051 this.sendPacket(new InactivePacket(), null);
1052 }
1053
1054 public class Features {
1055 XmppConnection connection;
1056
1057 public Features(final XmppConnection connection) {
1058 this.connection = connection;
1059 }
1060
1061 private boolean hasDiscoFeature(final Jid server, final String feature) {
1062 return connection.disco.containsKey(server.toDomainJid().toString()) &&
1063 connection.disco.get(server.toDomainJid().toString()).contains(feature);
1064 }
1065
1066 public boolean carbons() {
1067 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1068 }
1069
1070 public boolean blocking() {
1071 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1072 }
1073
1074 public boolean register() {
1075 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1076 }
1077
1078 public boolean sm() {
1079 return streamId != null;
1080 }
1081
1082 public boolean csi() {
1083 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1084 }
1085
1086 public boolean pubsub() {
1087 return hasDiscoFeature(account.getServer(),
1088 "http://jabber.org/protocol/pubsub#publish");
1089 }
1090
1091 public boolean mam() {
1092 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1093 }
1094
1095 public boolean advancedStreamFeaturesLoaded() {
1096 return disco.containsKey(account.getServer().toString());
1097 }
1098
1099 public boolean rosterVersioning() {
1100 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1101 }
1102
1103 public boolean streamhost() {
1104 return connection
1105 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1106 }
1107 }
1108
1109 private IqGenerator getIqGenerator() {
1110 return mXmppConnectionService.getIqGenerator();
1111 }
1112}