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.CryptoHelper;
57import eu.siacs.conversations.utils.DNSHelper;
58import eu.siacs.conversations.utils.Xmlns;
59import eu.siacs.conversations.xml.Element;
60import eu.siacs.conversations.xml.Tag;
61import eu.siacs.conversations.xml.TagWriter;
62import eu.siacs.conversations.xml.XmlReader;
63import eu.siacs.conversations.xmpp.jid.InvalidJidException;
64import eu.siacs.conversations.xmpp.jid.Jid;
65import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
66import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
67import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
68import eu.siacs.conversations.xmpp.stanzas.IqPacket;
69import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
70import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
71import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
72import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
73import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
74import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
75import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
76import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
77
78public class XmppConnection implements Runnable {
79
80 private static final int PACKET_IQ = 0;
81 private static final int PACKET_MESSAGE = 1;
82 private static final int PACKET_PRESENCE = 2;
83 private final Context applicationContext;
84 protected Account account;
85 private final WakeLock wakeLock;
86 private Socket socket;
87 private XmlReader tagReader;
88 private TagWriter tagWriter;
89 private final Features features = new Features(this);
90 private boolean shouldBind = true;
91 private boolean shouldAuthenticate = true;
92 private Element streamFeatures;
93 private final HashMap<Jid, Info> disco = new HashMap<>();
94
95 private String streamId = null;
96 private int smVersion = 3;
97 private final SparseArray<String> messageReceipts = new SparseArray<>();
98
99 private int stanzasReceived = 0;
100 private int stanzasSent = 0;
101 private long lastPacketReceived = 0;
102 private long lastPingSent = 0;
103 private long lastConnect = 0;
104 private long lastSessionStarted = 0;
105 private int attempt = 0;
106 private final Map<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
107 private OnPresencePacketReceived presenceListener = null;
108 private OnJinglePacketReceived jingleListener = null;
109 private OnIqPacketReceived unregisteredIqListener = null;
110 private OnMessagePacketReceived messageListener = null;
111 private OnStatusChanged statusListener = null;
112 private OnBindListener bindListener = null;
113 private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
114 private OnMessageAcknowledged acknowledgedListener = null;
115 private XmppConnectionService mXmppConnectionService = null;
116
117 private SaslMechanism saslMechanism;
118
119 public XmppConnection(final Account account, final XmppConnectionService service) {
120 this.account = account;
121 this.wakeLock = service.getPowerManager().newWakeLock(
122 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
123 tagWriter = new TagWriter();
124 mXmppConnectionService = service;
125 applicationContext = service.getApplicationContext();
126 }
127
128 protected void changeStatus(final Account.State nextStatus) {
129 if (account.getStatus() != nextStatus) {
130 if ((nextStatus == Account.State.OFFLINE)
131 && (account.getStatus() != Account.State.CONNECTING)
132 && (account.getStatus() != Account.State.ONLINE)
133 && (account.getStatus() != Account.State.DISABLED)) {
134 return;
135 }
136 if (nextStatus == Account.State.ONLINE) {
137 this.attempt = 0;
138 }
139 account.setStatus(nextStatus);
140 if (statusListener != null) {
141 statusListener.onStatusChanged(account);
142 }
143 }
144 }
145
146 protected void connect() {
147 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
148 features.encryptionEnabled = false;
149 lastConnect = SystemClock.elapsedRealtime();
150 lastPingSent = SystemClock.elapsedRealtime();
151 this.attempt++;
152 try {
153 shouldAuthenticate = shouldBind = !account.isOptionSet(Account.OPTION_REGISTER);
154 tagReader = new XmlReader(wakeLock);
155 tagWriter = new TagWriter();
156 packetCallbacks.clear();
157 this.changeStatus(Account.State.CONNECTING);
158 final Bundle result = DNSHelper.getSRVRecord(account.getServer());
159 final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
160 if ("timeout".equals(result.getString("error"))) {
161 throw new IOException("timeout in dns");
162 } else if (values != null) {
163 int i = 0;
164 boolean socketError = true;
165 while (socketError && values.size() > i) {
166 final Bundle namePort = (Bundle) values.get(i);
167 try {
168 String srvRecordServer;
169 try {
170 srvRecordServer=IDN.toASCII(namePort.getString("name"));
171 } catch (final IllegalArgumentException e) {
172 // TODO: Handle me?`
173 srvRecordServer = "";
174 }
175 final int srvRecordPort = namePort.getInt("port");
176 final String srvIpServer = namePort.getString("ip");
177 final InetSocketAddress addr;
178 if (srvIpServer != null) {
179 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
180 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
181 + ": using values from dns " + srvRecordServer
182 + "[" + srvIpServer + "]:" + srvRecordPort);
183 } else {
184 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
185 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
186 + ": using values from dns "
187 + srvRecordServer + ":" + srvRecordPort);
188 }
189 socket = new Socket();
190 socket.connect(addr, 20000);
191 socketError = false;
192 } catch (final UnknownHostException e) {
193 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
194 i++;
195 } catch (final IOException e) {
196 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
197 i++;
198 }
199 }
200 if (socketError) {
201 throw new UnknownHostException();
202 }
203 } else if (result.containsKey("error")
204 && "nosrv".equals(result.getString("error", null))) {
205 socket = new Socket(account.getServer().getDomainpart(), 5222);
206 } else {
207 throw new IOException("unhandled exception in DNS resolver");
208 }
209 final OutputStream out = socket.getOutputStream();
210 tagWriter.setOutputStream(out);
211 final InputStream in = socket.getInputStream();
212 tagReader.setInputStream(in);
213 tagWriter.beginDocument();
214 sendStartStream();
215 Tag nextTag;
216 while ((nextTag = tagReader.readTag()) != null) {
217 if (nextTag.isStart("stream")) {
218 processStream(nextTag);
219 break;
220 } else {
221 throw new IOException("unknown tag on connect");
222 }
223 }
224 if (socket.isConnected()) {
225 socket.close();
226 }
227 } catch (final UnknownHostException | ConnectException e) {
228 this.changeStatus(Account.State.SERVER_NOT_FOUND);
229 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
230 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
231 this.changeStatus(Account.State.OFFLINE);
232 this.attempt--; //don't count attempt when reconnecting instantly anyway
233 } finally {
234 if (wakeLock.isHeld()) {
235 try {
236 wakeLock.release();
237 } catch (final RuntimeException ignored) {
238 }
239 }
240 }
241 }
242
243 @Override
244 public void run() {
245 try {
246 if (socket != null) {
247 socket.close();
248 }
249 } catch (final IOException ignored) {
250
251 }
252 connect();
253 }
254
255 private void processStream(final Tag currentTag) throws XmlPullParserException,
256 IOException, NoSuchAlgorithmException {
257 Tag nextTag = tagReader.readTag();
258
259 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
260 if (nextTag.isStart("error")) {
261 processStreamError(nextTag);
262 } else if (nextTag.isStart("features")) {
263 processStreamFeatures(nextTag);
264 } else if (nextTag.isStart("proceed")) {
265 switchOverToTls(nextTag);
266 } else if (nextTag.isStart("success")) {
267 final String challenge = tagReader.readElement(nextTag).getContent();
268 try {
269 saslMechanism.getResponse(challenge);
270 } catch (final SaslMechanism.AuthenticationException e) {
271 disconnect(true);
272 Log.e(Config.LOGTAG, String.valueOf(e));
273 }
274 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
275 account.setKey(Account.PINNED_MECHANISM_KEY,
276 String.valueOf(saslMechanism.getPriority()));
277 tagReader.reset();
278 sendStartStream();
279 processStream(tagReader.readTag());
280 break;
281 } else if (nextTag.isStart("failure")) {
282 tagReader.readElement(nextTag);
283 changeStatus(Account.State.UNAUTHORIZED);
284 } else if (nextTag.isStart("challenge")) {
285 final String challenge = tagReader.readElement(nextTag).getContent();
286 final Element response = new Element("response");
287 response.setAttribute("xmlns",
288 "urn:ietf:params:xml:ns:xmpp-sasl");
289 try {
290 response.setContent(saslMechanism.getResponse(challenge));
291 } catch (final SaslMechanism.AuthenticationException e) {
292 // TODO: Send auth abort tag.
293 Log.e(Config.LOGTAG, e.toString());
294 }
295 tagWriter.writeElement(response);
296 } else if (nextTag.isStart("enabled")) {
297 final Element enabled = tagReader.readElement(nextTag);
298 if ("true".equals(enabled.getAttribute("resume"))) {
299 this.streamId = enabled.getAttribute("id");
300 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
301 + ": stream managment(" + smVersion
302 + ") enabled (resumable)");
303 } else {
304 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
305 + ": stream managment(" + smVersion + ") enabled");
306 }
307 this.lastSessionStarted = SystemClock.elapsedRealtime();
308 this.stanzasReceived = 0;
309 final RequestPacket r = new RequestPacket(smVersion);
310 tagWriter.writeStanzaAsync(r);
311 } else if (nextTag.isStart("resumed")) {
312 lastPacketReceived = SystemClock.elapsedRealtime();
313 final Element resumed = tagReader.readElement(nextTag);
314 final String h = resumed.getAttribute("h");
315 try {
316 final int serverCount = Integer.parseInt(h);
317 if (serverCount != stanzasSent) {
318 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
319 + ": session resumed with lost packages");
320 stanzasSent = serverCount;
321 } else {
322 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
323 + ": session resumed");
324 }
325 if (acknowledgedListener != null) {
326 for (int i = 0; i < messageReceipts.size(); ++i) {
327 if (serverCount >= messageReceipts.keyAt(i)) {
328 acknowledgedListener.onMessageAcknowledged(
329 account, messageReceipts.valueAt(i));
330 }
331 }
332 }
333 messageReceipts.clear();
334 } catch (final NumberFormatException ignored) {
335 }
336 sendServiceDiscoveryInfo(account.getServer());
337 sendServiceDiscoveryInfo(account.getJid().toBareJid());
338 sendServiceDiscoveryItems(account.getServer());
339 sendInitialPing();
340 } else if (nextTag.isStart("r")) {
341 tagReader.readElement(nextTag);
342 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
343 tagWriter.writeStanzaAsync(ack);
344 } else if (nextTag.isStart("a")) {
345 final Element ack = tagReader.readElement(nextTag);
346 lastPacketReceived = SystemClock.elapsedRealtime();
347 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
348 final String msgId = this.messageReceipts.get(serverSequence);
349 if (msgId != null) {
350 if (this.acknowledgedListener != null) {
351 this.acknowledgedListener.onMessageAcknowledged(
352 account, msgId);
353 }
354 this.messageReceipts.remove(serverSequence);
355 }
356 } else if (nextTag.isStart("failed")) {
357 tagReader.readElement(nextTag);
358 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
359 streamId = null;
360 if (account.getStatus() != Account.State.ONLINE) {
361 sendBindRequest();
362 }
363 } else if (nextTag.isStart("iq")) {
364 processIq(nextTag);
365 } else if (nextTag.isStart("message")) {
366 processMessage(nextTag);
367 } else if (nextTag.isStart("presence")) {
368 processPresence(nextTag);
369 }
370 nextTag = tagReader.readTag();
371 }
372 if (account.getStatus() == Account.State.ONLINE) {
373 account. setStatus(Account.State.OFFLINE);
374 if (statusListener != null) {
375 statusListener.onStatusChanged(account);
376 }
377 }
378 }
379
380 private void sendInitialPing() {
381 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
382 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
383 iq.setFrom(account.getJid());
384 iq.addChild("ping", "urn:xmpp:ping");
385 this.sendIqPacket(iq, new OnIqPacketReceived() {
386 @Override
387 public void onIqPacketReceived(final Account account, final IqPacket packet) {
388 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
389 + ": online with resource " + account.getResource());
390 changeStatus(Account.State.ONLINE);
391 }
392 });
393 }
394
395 private Element processPacket(final Tag currentTag, final int packetType)
396 throws XmlPullParserException, IOException {
397 Element element;
398 switch (packetType) {
399 case PACKET_IQ:
400 element = new IqPacket();
401 break;
402 case PACKET_MESSAGE:
403 element = new MessagePacket();
404 break;
405 case PACKET_PRESENCE:
406 element = new PresencePacket();
407 break;
408 default:
409 return null;
410 }
411 element.setAttributes(currentTag.getAttributes());
412 Tag nextTag = tagReader.readTag();
413 if (nextTag == null) {
414 throw new IOException("interrupted mid tag");
415 }
416 while (!nextTag.isEnd(element.getName())) {
417 if (!nextTag.isNo()) {
418 final Element child = tagReader.readElement(nextTag);
419 final String type = currentTag.getAttribute("type");
420 if (packetType == PACKET_IQ
421 && "jingle".equals(child.getName())
422 && ("set".equalsIgnoreCase(type) || "get"
423 .equalsIgnoreCase(type))) {
424 element = new JinglePacket();
425 element.setAttributes(currentTag.getAttributes());
426 }
427 element.addChild(child);
428 }
429 nextTag = tagReader.readTag();
430 if (nextTag == null) {
431 throw new IOException("interrupted mid tag");
432 }
433 }
434 ++stanzasReceived;
435 lastPacketReceived = SystemClock.elapsedRealtime();
436 return element;
437 }
438
439 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
440 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
441
442 if (packet.getId() == null) {
443 return; // an iq packet without id is definitely invalid
444 }
445
446 if (packet instanceof JinglePacket) {
447 if (this.jingleListener != null) {
448 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
449 }
450 } else {
451 if (packetCallbacks.containsKey(packet.getId())) {
452 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
453 // Packets to the server should have responses from the server
454 if (packetCallbackDuple.first.toServer(account)) {
455 if (packet.fromServer(account)) {
456 packetCallbackDuple.second.onIqPacketReceived(account, packet);
457 packetCallbacks.remove(packet.getId());
458 } else {
459 Log.e(Config.LOGTAG,account.getJid().toBareJid().toString()+": ignoring spoofed iq packet");
460 }
461 } else {
462 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
463 packetCallbackDuple.second.onIqPacketReceived(account, packet);
464 packetCallbacks.remove(packet.getId());
465 } else {
466 Log.e(Config.LOGTAG,account.getJid().toBareJid().toString()+": ignoring spoofed iq packet");
467 }
468 }
469 } else if (packet.getType() == IqPacket.TYPE.GET|| packet.getType() == IqPacket.TYPE.SET) {
470 this.unregisteredIqListener.onIqPacketReceived(account, packet);
471 }
472 }
473 }
474
475 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
476 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
477 this.messageListener.onMessagePacketReceived(account, packet);
478 }
479
480 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
481 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
482 this.presenceListener.onPresencePacketReceived(account, packet);
483 }
484
485 private void sendStartTLS() throws IOException {
486 final Tag startTLS = Tag.empty("starttls");
487 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
488 tagWriter.writeTag(startTLS);
489 }
490
491 private SharedPreferences getPreferences() {
492 return PreferenceManager.getDefaultSharedPreferences(applicationContext);
493 }
494
495 private boolean enableLegacySSL() {
496 return getPreferences().getBoolean("enable_legacy_ssl", false);
497 }
498
499 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
500 tagReader.readTag();
501 try {
502 final SSLContext sc = SSLContext.getInstance("TLS");
503 sc.init(null,new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},mXmppConnectionService.getRNG());
504 final SSLSocketFactory factory = sc.getSocketFactory();
505 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
506 final InetAddress address = socket == null ? null : socket.getInetAddress();
507
508 if (factory == null || address == null || verifier == null) {
509 throw new IOException("could not setup ssl");
510 }
511
512 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
513
514 if (sslSocket == null) {
515 throw new IOException("could not initialize ssl socket");
516 }
517
518 final String[] supportProtocols;
519 final Collection<String> supportedProtocols = new LinkedList<>(
520 Arrays.asList(sslSocket.getSupportedProtocols()));
521 supportedProtocols.remove("SSLv3");
522 supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]);
523
524 sslSocket.setEnabledProtocols(supportProtocols);
525
526 final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
527 sslSocket.getSupportedCipherSuites());
528 //Log.d(Config.LOGTAG, "Using ciphers: " + Arrays.toString(cipherSuites));
529 if (cipherSuites.length > 0) {
530 sslSocket.setEnabledCipherSuites(cipherSuites);
531 }
532
533 if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) {
534 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
535 disconnect(true);
536 changeStatus(Account.State.SECURITY_ERROR);
537 }
538 tagReader.setInputStream(sslSocket.getInputStream());
539 tagWriter.setOutputStream(sslSocket.getOutputStream());
540 sendStartStream();
541 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
542 features.encryptionEnabled = true;
543 processStream(tagReader.readTag());
544 sslSocket.close();
545 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
546 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
547 disconnect(true);
548 changeStatus(Account.State.SECURITY_ERROR);
549 }
550 }
551
552 private void processStreamFeatures(final Tag currentTag)
553 throws XmlPullParserException, IOException {
554 this.streamFeatures = tagReader.readElement(currentTag);
555 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
556 sendStartTLS();
557 } else if (this.streamFeatures.hasChild("register")
558 && account.isOptionSet(Account.OPTION_REGISTER)
559 && features.encryptionEnabled) {
560 sendRegistryRequest();
561 } else if (!this.streamFeatures.hasChild("register")
562 && account.isOptionSet(Account.OPTION_REGISTER)) {
563 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
564 disconnect(true);
565 } else if (this.streamFeatures.hasChild("mechanisms")
566 && shouldAuthenticate && features.encryptionEnabled) {
567 final List<String> mechanisms = extractMechanisms(streamFeatures
568 .findChild("mechanisms"));
569 final Element auth = new Element("auth");
570 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
571 if (mechanisms.contains("SCRAM-SHA-1")) {
572 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
573 } else if (mechanisms.contains("PLAIN")) {
574 saslMechanism = new Plain(tagWriter, account);
575 } else if (mechanisms.contains("DIGEST-MD5")) {
576 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
577 }
578 final JSONObject keys = account.getKeys();
579 try {
580 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
581 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority() ) {
582 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
583 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
584 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
585 "). Possible downgrade attack?");
586 disconnect(true);
587 changeStatus(Account.State.SECURITY_ERROR);
588 }
589 } catch (final JSONException e) {
590 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
591 }
592 Log.d(Config.LOGTAG,account.getJid().toString()+": Authenticating with " + saslMechanism.getMechanism());
593 auth.setAttribute("mechanism", saslMechanism.getMechanism());
594 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
595 auth.setContent(saslMechanism.getClientFirstMessage());
596 }
597 tagWriter.writeElement(auth);
598 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
599 + smVersion)
600 && streamId != null) {
601 final ResumePacket resume = new ResumePacket(this.streamId,
602 stanzasReceived, smVersion);
603 this.tagWriter.writeStanzaAsync(resume);
604 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
605 sendBindRequest();
606 } else {
607 disconnect(true);
608 changeStatus(Account.State.INCOMPATIBLE_SERVER);
609 }
610 }
611
612 private List<String> extractMechanisms(final Element stream) {
613 final ArrayList<String> mechanisms = new ArrayList<>(stream
614 .getChildren().size());
615 for (final Element child : stream.getChildren()) {
616 mechanisms.add(child.getContent());
617 }
618 return mechanisms;
619 }
620
621 private void sendRegistryRequest() {
622 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
623 register.query("jabber:iq:register");
624 register.setTo(account.getServer());
625 sendIqPacket(register, new OnIqPacketReceived() {
626
627 @Override
628 public void onIqPacketReceived(final Account account, final IqPacket packet) {
629 final Element instructions = packet.query().findChild("instructions");
630 if (packet.query().hasChild("username")
631 && (packet.query().hasChild("password"))) {
632 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
633 final Element username = new Element("username")
634 .setContent(account.getUsername());
635 final Element password = new Element("password")
636 .setContent(account.getPassword());
637 register.query("jabber:iq:register").addChild(username);
638 register.query().addChild(password);
639 sendIqPacket(register, new OnIqPacketReceived() {
640
641 @Override
642 public void onIqPacketReceived(final Account account, final IqPacket packet) {
643 if (packet.getType() == IqPacket.TYPE.RESULT) {
644 account.setOption(Account.OPTION_REGISTER,
645 false);
646 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
647 } else if (packet.hasChild("error")
648 && (packet.findChild("error")
649 .hasChild("conflict"))) {
650 changeStatus(Account.State.REGISTRATION_CONFLICT);
651 } else {
652 changeStatus(Account.State.REGISTRATION_FAILED);
653 Log.d(Config.LOGTAG, packet.toString());
654 }
655 disconnect(true);
656 }
657 });
658 } else {
659 changeStatus(Account.State.REGISTRATION_FAILED);
660 disconnect(true);
661 Log.d(Config.LOGTAG, account.getJid().toBareJid()
662 + ": could not register. instructions are"
663 + instructions.getContent());
664 }
665 }
666 });
667 }
668
669 private void sendBindRequest() {
670 while(!mXmppConnectionService.areMessagesInitialized()) {
671 try {
672 Thread.sleep(500);
673 } catch (final InterruptedException ignored) {
674 }
675 }
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.sendUnmodifiedIqPacket(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("session")) {
692 sendStartSession();
693 } else {
694 sendPostBindInitialization();
695 }
696 } else {
697 disconnect(true);
698 }
699 } else {
700 disconnect(true);
701 }
702 }
703 });
704 }
705
706 private void sendStartSession() {
707 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
708 startSession.addChild("session","urn:ietf:params:xml:ns:xmpp-session");
709 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
710 @Override
711 public void onIqPacketReceived(Account account, IqPacket packet) {
712 if (packet.getType() == IqPacket.TYPE.RESULT) {
713 sendPostBindInitialization();
714 } else {
715 disconnect(true);
716 }
717 }
718 });
719 }
720
721 private void sendPostBindInitialization() {
722 smVersion = 0;
723 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
724 smVersion = 3;
725 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
726 smVersion = 2;
727 }
728 if (smVersion != 0) {
729 final EnablePacket enable = new EnablePacket(smVersion);
730 tagWriter.writeStanzaAsync(enable);
731 stanzasSent = 0;
732 messageReceipts.clear();
733 }
734 features.carbonsEnabled = false;
735 features.blockListRequested = false;
736 disco.clear();
737 sendServiceDiscoveryInfo(account.getServer());
738 sendServiceDiscoveryInfo(account.getJid().toBareJid());
739 sendServiceDiscoveryItems(account.getServer());
740 if (bindListener != null) {
741 bindListener.onBind(account);
742 }
743 sendInitialPing();
744 }
745
746 private void sendServiceDiscoveryInfo(final Jid jid) {
747 if (disco.containsKey(jid)) {
748 if (account.getServer().equals(jid)) {
749 enableAdvancedStreamFeatures();
750 }
751 } else {
752 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
753 iq.setTo(jid);
754 iq.query("http://jabber.org/protocol/disco#info");
755 this.sendIqPacket(iq, new OnIqPacketReceived() {
756
757 @Override
758 public void onIqPacketReceived(final Account account, final IqPacket packet) {
759 final List<Element> elements = packet.query().getChildren();
760 final Info info = new Info();
761 for (final Element element : elements) {
762 if (element.getName().equals("identity")) {
763 String type = element.getAttribute("type");
764 String category = element.getAttribute("category");
765 if (type != null && category != null) {
766 info.identities.add(new Pair<>(category,type));
767 }
768 } else if (element.getName().equals("feature")) {
769 info.features.add(element.getAttribute("var"));
770 }
771 }
772 disco.put(jid, info);
773
774 if (account.getServer().equals(jid)) {
775 enableAdvancedStreamFeatures();
776 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
777 listener.onAdvancedStreamFeaturesAvailable(account);
778 }
779 }
780 }
781 });
782 }
783 }
784
785 private void enableAdvancedStreamFeatures() {
786 if (getFeatures().carbons() && !features.carbonsEnabled) {
787 sendEnableCarbons();
788 }
789 if (getFeatures().blocking() && !features.blockListRequested) {
790 Log.d(Config.LOGTAG, "Requesting block list");
791 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
792 }
793 }
794
795 private void sendServiceDiscoveryItems(final Jid server) {
796 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
797 iq.setTo(server.toDomainJid());
798 iq.query("http://jabber.org/protocol/disco#items");
799 this.sendIqPacket(iq, new OnIqPacketReceived() {
800
801 @Override
802 public void onIqPacketReceived(final Account account, final IqPacket packet) {
803 final List<Element> elements = packet.query().getChildren();
804 for (final Element element : elements) {
805 if (element.getName().equals("item")) {
806 final Jid jid = element.getAttributeAsJid("jid");
807 if (jid != null && !jid.equals(account.getServer())) {
808 sendServiceDiscoveryInfo(jid);
809 }
810 }
811 }
812 }
813 });
814 }
815
816 private void sendEnableCarbons() {
817 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
818 iq.addChild("enable", "urn:xmpp:carbons:2");
819 this.sendIqPacket(iq, new OnIqPacketReceived() {
820
821 @Override
822 public void onIqPacketReceived(final Account account, final IqPacket packet) {
823 if (!packet.hasChild("error")) {
824 Log.d(Config.LOGTAG, account.getJid().toBareJid()
825 + ": successfully enabled carbons");
826 features.carbonsEnabled = true;
827 } else {
828 Log.d(Config.LOGTAG, account.getJid().toBareJid()
829 + ": error enableing carbons " + packet.toString());
830 }
831 }
832 });
833 }
834
835 private void processStreamError(final Tag currentTag)
836 throws XmlPullParserException, IOException {
837 final Element streamError = tagReader.readElement(currentTag);
838 if (streamError != null && streamError.hasChild("conflict")) {
839 final String resource = account.getResource().split("\\.")[0];
840 account.setResource(resource + "." + nextRandomId());
841 Log.d(Config.LOGTAG,
842 account.getJid().toBareJid() + ": switching resource due to conflict ("
843 + account.getResource() + ")");
844 }
845 }
846
847 private void sendStartStream() throws IOException {
848 final Tag stream = Tag.start("stream:stream");
849 stream.setAttribute("from", account.getJid().toBareJid().toString());
850 stream.setAttribute("to", account.getServer().toString());
851 stream.setAttribute("version", "1.0");
852 stream.setAttribute("xml:lang", "en");
853 stream.setAttribute("xmlns", "jabber:client");
854 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
855 tagWriter.writeTag(stream);
856 }
857
858 private String nextRandomId() {
859 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
860 }
861
862 public void sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
863 packet.setFrom(account.getJid());
864 this.sendUnmodifiedIqPacket(packet,callback);
865
866 }
867
868 private synchronized void sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
869 if (packet.getId() == null) {
870 final String id = nextRandomId();
871 packet.setAttribute("id", id);
872 }
873 if (callback != null) {
874 if (packet.getId() == null) {
875 packet.setId(nextRandomId());
876 }
877 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
878 }
879 this.sendPacket(packet);
880 }
881
882 public void sendMessagePacket(final MessagePacket packet) {
883 this.sendPacket(packet);
884 }
885
886 public void sendPresencePacket(final PresencePacket packet) {
887 this.sendPacket(packet);
888 }
889
890 private synchronized void sendPacket(final AbstractStanza packet) {
891 final String name = packet.getName();
892 if (name.equals("iq") || name.equals("message") || name.equals("presence")) {
893 ++stanzasSent;
894 }
895 tagWriter.writeStanzaAsync(packet);
896 if (packet instanceof MessagePacket && packet.getId() != null && this.streamId != null) {
897 Log.d(Config.LOGTAG, "request delivery report for stanza " + stanzasSent);
898 this.messageReceipts.put(stanzasSent, packet.getId());
899 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
900 }
901 }
902
903 public void sendPing() {
904 if (streamFeatures.hasChild("sm")) {
905 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
906 } else {
907 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
908 iq.setFrom(account.getJid());
909 iq.addChild("ping", "urn:xmpp:ping");
910 this.sendIqPacket(iq, null);
911 }
912 this.lastPingSent = SystemClock.elapsedRealtime();
913 }
914
915 public void setOnMessagePacketReceivedListener(
916 final OnMessagePacketReceived listener) {
917 this.messageListener = listener;
918 }
919
920 public void setOnUnregisteredIqPacketReceivedListener(
921 final OnIqPacketReceived listener) {
922 this.unregisteredIqListener = listener;
923 }
924
925 public void setOnPresencePacketReceivedListener(
926 final OnPresencePacketReceived listener) {
927 this.presenceListener = listener;
928 }
929
930 public void setOnJinglePacketReceivedListener(
931 final OnJinglePacketReceived listener) {
932 this.jingleListener = listener;
933 }
934
935 public void setOnStatusChangedListener(final OnStatusChanged listener) {
936 this.statusListener = listener;
937 }
938
939 public void setOnBindListener(final OnBindListener listener) {
940 this.bindListener = listener;
941 }
942
943 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
944 this.acknowledgedListener = listener;
945 }
946
947 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
948 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
949 this.advancedStreamFeaturesLoadedListeners.add(listener);
950 }
951 }
952
953 public void disconnect(final boolean force) {
954 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
955 try {
956 if (force) {
957 socket.close();
958 return;
959 }
960 new Thread(new Runnable() {
961
962 @Override
963 public void run() {
964 if (tagWriter.isActive()) {
965 tagWriter.finish();
966 try {
967 while (!tagWriter.finished()) {
968 Log.d(Config.LOGTAG, "not yet finished");
969 Thread.sleep(100);
970 }
971 tagWriter.writeTag(Tag.end("stream:stream"));
972 socket.close();
973 } catch (final IOException e) {
974 Log.d(Config.LOGTAG,
975 "io exception during disconnect");
976 } catch (final InterruptedException e) {
977 Log.d(Config.LOGTAG, "interrupted");
978 }
979 }
980 }
981 }).start();
982 } catch (final IOException e) {
983 Log.d(Config.LOGTAG, "io exception during disconnect");
984 }
985 }
986
987 public void resetStreamId() {
988 this.streamId = null;
989 }
990
991 public List<String> findDiscoItemsByFeature(final String feature) {
992 final List<String> items = new ArrayList<>();
993 for (final Entry<Jid, Info> cursor : disco.entrySet()) {
994 if (cursor.getValue().features.contains(feature)) {
995 items.add(cursor.getKey().toString());
996 }
997 }
998 return items;
999 }
1000
1001 public String findDiscoItemByFeature(final String feature) {
1002 final List<String> items = findDiscoItemsByFeature(feature);
1003 if (items.size() >= 1) {
1004 return items.get(0);
1005 }
1006 return null;
1007 }
1008
1009 public void r() {
1010 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1011 }
1012
1013 public String getMucServer() {
1014 for (final Entry<Jid, Info> cursor : disco.entrySet()) {
1015 final Info value = cursor.getValue();
1016 if (value.features.contains("http://jabber.org/protocol/muc")
1017 && !value.features.contains("jabber:iq:gateway")
1018 && !value.identities.contains(new Pair<>("conference","irc"))) {
1019 return cursor.getKey().toString();
1020 }
1021 }
1022 return null;
1023 }
1024
1025 public int getTimeToNextAttempt() {
1026 final int interval = (int) (25 * Math.pow(1.5, attempt));
1027 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1028 return interval - secondsSinceLast;
1029 }
1030
1031 public int getAttempt() {
1032 return this.attempt;
1033 }
1034
1035 public Features getFeatures() {
1036 return this.features;
1037 }
1038
1039 public long getLastSessionEstablished() {
1040 final long diff;
1041 if (this.lastSessionStarted == 0) {
1042 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1043 } else {
1044 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1045 }
1046 return System.currentTimeMillis() - diff;
1047 }
1048
1049 public long getLastConnect() {
1050 return this.lastConnect;
1051 }
1052
1053 public long getLastPingSent() {
1054 return this.lastPingSent;
1055 }
1056
1057 public long getLastPacketReceived() {
1058 return this.lastPacketReceived;
1059 }
1060
1061 public void sendActive() {
1062 this.sendPacket(new ActivePacket());
1063 }
1064
1065 public void sendInactive() {
1066 this.sendPacket(new InactivePacket());
1067 }
1068
1069 public void resetAttemptCount() {
1070 this.attempt = 0;
1071 this.lastConnect = 0;
1072 }
1073
1074 private class Info {
1075 public final ArrayList<String> features = new ArrayList<>();
1076 public final ArrayList<Pair<String,String>> identities = new ArrayList<>();
1077 }
1078
1079 public class Features {
1080 XmppConnection connection;
1081 private boolean carbonsEnabled = false;
1082 private boolean encryptionEnabled = false;
1083 private boolean blockListRequested = false;
1084
1085 public Features(final XmppConnection connection) {
1086 this.connection = connection;
1087 }
1088
1089 private boolean hasDiscoFeature(final Jid server, final String feature) {
1090 return connection.disco.containsKey(server) &&
1091 connection.disco.get(server).features.contains(feature);
1092 }
1093
1094 public boolean carbons() {
1095 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1096 }
1097
1098 public boolean blocking() {
1099 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1100 }
1101
1102 public boolean register() {
1103 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1104 }
1105
1106 public boolean sm() {
1107 return streamId != null
1108 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1109 }
1110
1111 public boolean csi() {
1112 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1113 }
1114
1115 public boolean pep() {
1116 final Pair<String,String> needle = new Pair<>("pubsub","pep");
1117 Info info = disco.get(account.getServer());
1118 if (info != null && info.identities.contains(needle)) {
1119 return true;
1120 } else {
1121 info = disco.get(account.getJid().toBareJid());
1122 return info != null && info.identities.contains(needle);
1123 }
1124 }
1125
1126 public boolean mam() {
1127 if (hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")) {
1128 return true;
1129 } else {
1130 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1131 }
1132 }
1133
1134 public boolean advancedStreamFeaturesLoaded() {
1135 return disco.containsKey(account.getServer());
1136 }
1137
1138 public boolean rosterVersioning() {
1139 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1140 }
1141
1142 public void setBlockListRequested(boolean value) {
1143 this.blockListRequested = value;
1144 }
1145 }
1146
1147 private IqGenerator getIqGenerator() {
1148 return mXmppConnectionService.getIqGenerator();
1149 }
1150}