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