1package eu.siacs.conversations.xmpp;
2
3import android.os.Bundle;
4import android.os.Parcelable;
5import android.os.PowerManager;
6import android.os.PowerManager.WakeLock;
7import android.os.SystemClock;
8import android.util.Log;
9import android.util.Pair;
10import android.util.SparseArray;
11
12import org.apache.http.conn.ssl.StrictHostnameVerifier;
13import org.json.JSONException;
14import org.json.JSONObject;
15import org.xmlpull.v1.XmlPullParserException;
16
17import java.io.IOException;
18import java.io.InputStream;
19import java.io.OutputStream;
20import java.math.BigInteger;
21import java.net.ConnectException;
22import java.net.IDN;
23import java.net.InetAddress;
24import java.net.InetSocketAddress;
25import java.net.Socket;
26import java.net.UnknownHostException;
27import java.security.KeyManagementException;
28import java.security.NoSuchAlgorithmException;
29import java.util.ArrayList;
30import java.util.Arrays;
31import java.util.Collection;
32import java.util.HashMap;
33import java.util.Hashtable;
34import java.util.Iterator;
35import java.util.LinkedList;
36import java.util.List;
37import java.util.Map.Entry;
38
39import javax.net.ssl.HostnameVerifier;
40import javax.net.ssl.SSLContext;
41import javax.net.ssl.SSLSocket;
42import javax.net.ssl.SSLSocketFactory;
43import javax.net.ssl.X509TrustManager;
44
45import eu.siacs.conversations.Config;
46import eu.siacs.conversations.crypto.sasl.DigestMd5;
47import eu.siacs.conversations.crypto.sasl.Plain;
48import eu.siacs.conversations.crypto.sasl.SaslMechanism;
49import eu.siacs.conversations.crypto.sasl.ScramSha1;
50import eu.siacs.conversations.entities.Account;
51import eu.siacs.conversations.generator.IqGenerator;
52import eu.siacs.conversations.services.XmppConnectionService;
53import eu.siacs.conversations.utils.CryptoHelper;
54import eu.siacs.conversations.utils.DNSHelper;
55import eu.siacs.conversations.utils.Xmlns;
56import eu.siacs.conversations.xml.Element;
57import eu.siacs.conversations.xml.Tag;
58import eu.siacs.conversations.xml.TagWriter;
59import eu.siacs.conversations.xml.XmlReader;
60import eu.siacs.conversations.xmpp.jid.InvalidJidException;
61import eu.siacs.conversations.xmpp.jid.Jid;
62import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
63import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
64import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
65import eu.siacs.conversations.xmpp.stanzas.IqPacket;
66import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
67import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
68import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
69import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
70import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
71import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
72import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
73import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
74
75public class XmppConnection implements Runnable {
76
77 private static final int PACKET_IQ = 0;
78 private static final int PACKET_MESSAGE = 1;
79 private static final int PACKET_PRESENCE = 2;
80 protected Account account;
81 private final WakeLock wakeLock;
82 private Socket socket;
83 private XmlReader tagReader;
84 private TagWriter tagWriter;
85 private final Features features = new Features(this);
86 private boolean shouldBind = true;
87 private boolean shouldAuthenticate = true;
88 private Element streamFeatures;
89 private final HashMap<Jid, Info> disco = new HashMap<>();
90
91 private String streamId = null;
92 private int smVersion = 3;
93 private final SparseArray<String> mStanzaReceipts = new SparseArray<>();
94
95 private int stanzasReceived = 0;
96 private int stanzasSent = 0;
97 private long lastPacketReceived = 0;
98 private long lastPingSent = 0;
99 private long lastConnect = 0;
100 private long lastSessionStarted = 0;
101 private int attempt = 0;
102 private final Hashtable<String, Pair<IqPacket, OnIqPacketReceived>> packetCallbacks = new Hashtable<>();
103 private OnPresencePacketReceived presenceListener = null;
104 private OnJinglePacketReceived jingleListener = null;
105 private OnIqPacketReceived unregisteredIqListener = null;
106 private OnMessagePacketReceived messageListener = null;
107 private OnStatusChanged statusListener = null;
108 private OnBindListener bindListener = null;
109 private final ArrayList<OnAdvancedStreamFeaturesLoaded> advancedStreamFeaturesLoadedListeners = new ArrayList<>();
110 private OnMessageAcknowledged acknowledgedListener = null;
111 private XmppConnectionService mXmppConnectionService = null;
112
113 private SaslMechanism saslMechanism;
114
115 public XmppConnection(final Account account, final XmppConnectionService service) {
116 this.account = account;
117 this.wakeLock = service.getPowerManager().newWakeLock(
118 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
119 tagWriter = new TagWriter();
120 mXmppConnectionService = service;
121 }
122
123 protected void changeStatus(final Account.State nextStatus) {
124 if (account.getStatus() != nextStatus) {
125 if ((nextStatus == Account.State.OFFLINE)
126 && (account.getStatus() != Account.State.CONNECTING)
127 && (account.getStatus() != Account.State.ONLINE)
128 && (account.getStatus() != Account.State.DISABLED)) {
129 return;
130 }
131 if (nextStatus == Account.State.ONLINE) {
132 this.attempt = 0;
133 }
134 account.setStatus(nextStatus);
135 if (statusListener != null) {
136 statusListener.onStatusChanged(account);
137 }
138 }
139 }
140
141 protected void connect() {
142 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
143 features.encryptionEnabled = false;
144 lastConnect = SystemClock.elapsedRealtime();
145 lastPingSent = SystemClock.elapsedRealtime();
146 this.attempt++;
147 try {
148 shouldAuthenticate = shouldBind = !account.isOptionSet(Account.OPTION_REGISTER);
149 tagReader = new XmlReader(wakeLock);
150 tagWriter = new TagWriter();
151 this.changeStatus(Account.State.CONNECTING);
152 if (DNSHelper.isIp(account.getServer().toString())) {
153 socket = new Socket();
154 try {
155 socket.connect(new InetSocketAddress(account.getServer().toString(), 5222), Config.SOCKET_TIMEOUT * 1000);
156 } catch (IOException e) {
157 throw new UnknownHostException();
158 }
159 } else {
160 final Bundle result = DNSHelper.getSRVRecord(account.getServer());
161 if (result == null) {
162 throw new IOException("unhandled exception in DNS resolver");
163 }
164 final ArrayList<Parcelable> values = result.getParcelableArrayList("values");
165 if ("timeout".equals(result.getString("error"))) {
166 throw new IOException("timeout in dns");
167 } else if (values != null) {
168 int i = 0;
169 boolean socketError = true;
170 while (socketError && values.size() > i) {
171 final Bundle namePort = (Bundle) values.get(i);
172 try {
173 String srvRecordServer;
174 try {
175 srvRecordServer = IDN.toASCII(namePort.getString("name"));
176 } catch (final IllegalArgumentException e) {
177 // TODO: Handle me?`
178 srvRecordServer = "";
179 }
180 final int srvRecordPort = namePort.getInt("port");
181 final String srvIpServer = namePort.getString("ip");
182 final InetSocketAddress addr;
183 if (srvIpServer != null) {
184 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
185 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
186 + ": using values from dns " + srvRecordServer
187 + "[" + srvIpServer + "]:" + srvRecordPort);
188 } else {
189 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
190 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
191 + ": using values from dns "
192 + srvRecordServer + ":" + srvRecordPort);
193 }
194 socket = new Socket();
195 socket.connect(addr, Config.SOCKET_TIMEOUT * 1000);
196 socketError = false;
197 } catch (final Throwable 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 {
206 throw new IOException("unhandled exception in DNS resolver");
207 }
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 IncompatibleServerException e) {
228 this.changeStatus(Account.State.INCOMPATIBLE_SERVER);
229 } catch (final SecurityException e) {
230 this.changeStatus(Account.State.SECURITY_ERROR);
231 } catch (final UnauthorizedException e) {
232 this.changeStatus(Account.State.UNAUTHORIZED);
233 } catch (final UnknownHostException | ConnectException e) {
234 this.changeStatus(Account.State.SERVER_NOT_FOUND);
235 } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) {
236 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
237 this.changeStatus(Account.State.OFFLINE);
238 this.attempt--; //don't count attempt when reconnecting instantly anyway
239 } finally {
240 if (socket != null) {
241 try {
242 socket.close();
243 } catch (IOException e) {
244
245 }
246 }
247 if (wakeLock.isHeld()) {
248 try {
249 wakeLock.release();
250 } catch (final RuntimeException ignored) {
251 }
252 }
253 }
254 }
255
256 @Override
257 public void run() {
258 try {
259 if (socket != null) {
260 socket.close();
261 }
262 } catch (final IOException ignored) {
263
264 }
265 connect();
266 }
267
268 private void processStream(final Tag currentTag) throws XmlPullParserException,
269 IOException, NoSuchAlgorithmException {
270 Tag nextTag = tagReader.readTag();
271
272 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
273 if (nextTag.isStart("error")) {
274 processStreamError(nextTag);
275 } else if (nextTag.isStart("features")) {
276 processStreamFeatures(nextTag);
277 } else if (nextTag.isStart("proceed")) {
278 switchOverToTls(nextTag);
279 } else if (nextTag.isStart("success")) {
280 final String challenge = tagReader.readElement(nextTag).getContent();
281 try {
282 saslMechanism.getResponse(challenge);
283 } catch (final SaslMechanism.AuthenticationException e) {
284 disconnect(true);
285 Log.e(Config.LOGTAG, String.valueOf(e));
286 }
287 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
288 account.setKey(Account.PINNED_MECHANISM_KEY,
289 String.valueOf(saslMechanism.getPriority()));
290 tagReader.reset();
291 sendStartStream();
292 processStream(tagReader.readTag());
293 break;
294 } else if (nextTag.isStart("failure")) {
295 throw new UnauthorizedException();
296 } else if (nextTag.isStart("challenge")) {
297 final String challenge = tagReader.readElement(nextTag).getContent();
298 final Element response = new Element("response");
299 response.setAttribute("xmlns",
300 "urn:ietf:params:xml:ns:xmpp-sasl");
301 try {
302 response.setContent(saslMechanism.getResponse(challenge));
303 } catch (final SaslMechanism.AuthenticationException e) {
304 // TODO: Send auth abort tag.
305 Log.e(Config.LOGTAG, e.toString());
306 }
307 tagWriter.writeElement(response);
308 } else if (nextTag.isStart("enabled")) {
309 final Element enabled = tagReader.readElement(nextTag);
310 if ("true".equals(enabled.getAttribute("resume"))) {
311 this.streamId = enabled.getAttribute("id");
312 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
313 + ": stream managment(" + smVersion
314 + ") enabled (resumable)");
315 } else {
316 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
317 + ": stream managment(" + smVersion + ") enabled");
318 }
319 this.lastSessionStarted = SystemClock.elapsedRealtime();
320 this.stanzasReceived = 0;
321 final RequestPacket r = new RequestPacket(smVersion);
322 tagWriter.writeStanzaAsync(r);
323 } else if (nextTag.isStart("resumed")) {
324 lastPacketReceived = SystemClock.elapsedRealtime();
325 final Element resumed = tagReader.readElement(nextTag);
326 final String h = resumed.getAttribute("h");
327 try {
328 final int serverCount = Integer.parseInt(h);
329 if (serverCount != stanzasSent) {
330 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
331 + ": session resumed with lost packages");
332 stanzasSent = serverCount;
333 } else {
334 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed");
335 }
336 acknowledgeStanzaUpTo(serverCount);
337 ArrayList<IqPacket> failedIqPackets = new ArrayList<>();
338 for(int i = 0; i < this.mStanzaReceipts.size(); ++i) {
339 String id = mStanzaReceipts.valueAt(i);
340 Pair<IqPacket,OnIqPacketReceived> pair = id == null ? null : this.packetCallbacks.get(id);
341 if (pair != null) {
342 failedIqPackets.add(pair.first);
343 }
344 }
345 mStanzaReceipts.clear();
346 Log.d(Config.LOGTAG,"resending "+failedIqPackets.size()+" iq stanza");
347 for(IqPacket packet : failedIqPackets) {
348 sendUnmodifiedIqPacket(packet,null);
349 }
350 } catch (final NumberFormatException ignored) {
351 }
352 sendInitialPing();
353 } else if (nextTag.isStart("r")) {
354 tagReader.readElement(nextTag);
355 if (Config.EXTENDED_SM_LOGGING) {
356 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived);
357 }
358 final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
359 tagWriter.writeStanzaAsync(ack);
360 } else if (nextTag.isStart("a")) {
361 final Element ack = tagReader.readElement(nextTag);
362 lastPacketReceived = SystemClock.elapsedRealtime();
363 try {
364 final int serverSequence = Integer.parseInt(ack.getAttribute("h"));
365 acknowledgeStanzaUpTo(serverSequence);
366 } catch (NumberFormatException e) {
367 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number");
368 }
369 } else if (nextTag.isStart("failed")) {
370 tagReader.readElement(nextTag);
371 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
372 streamId = null;
373 if (account.getStatus() != Account.State.ONLINE) {
374 sendBindRequest();
375 }
376 } else if (nextTag.isStart("iq")) {
377 processIq(nextTag);
378 } else if (nextTag.isStart("message")) {
379 processMessage(nextTag);
380 } else if (nextTag.isStart("presence")) {
381 processPresence(nextTag);
382 }
383 nextTag = tagReader.readTag();
384 }
385 if (account.getStatus() == Account.State.ONLINE) {
386 account. setStatus(Account.State.OFFLINE);
387 if (statusListener != null) {
388 statusListener.onStatusChanged(account);
389 }
390 }
391 }
392
393 private void acknowledgeStanzaUpTo(int serverCount) {
394 for (int i = 0; i < mStanzaReceipts.size(); ++i) {
395 if (serverCount >= mStanzaReceipts.keyAt(i)) {
396 if (Config.EXTENDED_SM_LOGGING) {
397 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + mStanzaReceipts.keyAt(i));
398 }
399 String id = mStanzaReceipts.valueAt(i);
400 if (acknowledgedListener != null) {
401 acknowledgedListener.onMessageAcknowledged(account, id);
402 }
403 mStanzaReceipts.removeAt(i);
404 i--;
405 }
406 }
407 }
408
409 private void sendInitialPing() {
410 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
411 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
412 iq.setFrom(account.getJid());
413 iq.addChild("ping", "urn:xmpp:ping");
414 this.sendIqPacket(iq, new OnIqPacketReceived() {
415 @Override
416 public void onIqPacketReceived(final Account account, final IqPacket packet) {
417 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
418 + ": online with resource " + account.getResource());
419 changeStatus(Account.State.ONLINE);
420 }
421 });
422 }
423
424 private Element processPacket(final Tag currentTag, final int packetType)
425 throws XmlPullParserException, IOException {
426 Element element;
427 switch (packetType) {
428 case PACKET_IQ:
429 element = new IqPacket();
430 break;
431 case PACKET_MESSAGE:
432 element = new MessagePacket();
433 break;
434 case PACKET_PRESENCE:
435 element = new PresencePacket();
436 break;
437 default:
438 return null;
439 }
440 element.setAttributes(currentTag.getAttributes());
441 Tag nextTag = tagReader.readTag();
442 if (nextTag == null) {
443 throw new IOException("interrupted mid tag");
444 }
445 while (!nextTag.isEnd(element.getName())) {
446 if (!nextTag.isNo()) {
447 final Element child = tagReader.readElement(nextTag);
448 final String type = currentTag.getAttribute("type");
449 if (packetType == PACKET_IQ
450 && "jingle".equals(child.getName())
451 && ("set".equalsIgnoreCase(type) || "get"
452 .equalsIgnoreCase(type))) {
453 element = new JinglePacket();
454 element.setAttributes(currentTag.getAttributes());
455 }
456 element.addChild(child);
457 }
458 nextTag = tagReader.readTag();
459 if (nextTag == null) {
460 throw new IOException("interrupted mid tag");
461 }
462 }
463 if (stanzasReceived == Integer.MAX_VALUE) {
464 resetStreamId();
465 throw new IOException("time to restart the session. cant handle >2 billion pcks");
466 }
467 ++stanzasReceived;
468 lastPacketReceived = SystemClock.elapsedRealtime();
469 return element;
470 }
471
472 private void processIq(final Tag currentTag) throws XmlPullParserException, IOException {
473 final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
474
475 if (packet.getId() == null) {
476 return; // an iq packet without id is definitely invalid
477 }
478
479 if (packet instanceof JinglePacket) {
480 if (this.jingleListener != null) {
481 this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet);
482 }
483 } else {
484 synchronized (this.packetCallbacks) {
485 if (packetCallbacks.containsKey(packet.getId())) {
486 final Pair<IqPacket, OnIqPacketReceived> packetCallbackDuple = packetCallbacks.get(packet.getId());
487 // Packets to the server should have responses from the server
488 if (packetCallbackDuple.first.toServer(account)) {
489 if (packet.fromServer(account)) {
490 packetCallbackDuple.second.onIqPacketReceived(account, packet);
491 packetCallbacks.remove(packet.getId());
492 } else {
493 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
494 }
495 } else {
496 if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) {
497 packetCallbackDuple.second.onIqPacketReceived(account, packet);
498 packetCallbacks.remove(packet.getId());
499 } else {
500 Log.e(Config.LOGTAG, account.getJid().toBareJid().toString() + ": ignoring spoofed iq packet");
501 }
502 }
503 } else if (packet.getType() == IqPacket.TYPE.GET || packet.getType() == IqPacket.TYPE.SET) {
504 this.unregisteredIqListener.onIqPacketReceived(account, packet);
505 }
506 }
507 }
508 }
509
510 private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException {
511 final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE);
512 this.messageListener.onMessagePacketReceived(account, packet);
513 }
514
515 private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException {
516 PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE);
517 this.presenceListener.onPresencePacketReceived(account, packet);
518 }
519
520 private void sendStartTLS() throws IOException {
521 final Tag startTLS = Tag.empty("starttls");
522 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
523 tagWriter.writeTag(startTLS);
524 }
525
526 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException {
527 tagReader.readTag();
528 try {
529 final SSLContext sc = SSLContext.getInstance("TLS");
530 sc.init(null,new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},mXmppConnectionService.getRNG());
531 final SSLSocketFactory factory = sc.getSocketFactory();
532 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
533 final InetAddress address = socket == null ? null : socket.getInetAddress();
534
535 if (factory == null || address == null || verifier == null) {
536 throw new IOException("could not setup ssl");
537 }
538
539 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
540
541 if (sslSocket == null) {
542 throw new IOException("could not initialize ssl socket");
543 }
544
545 final String[] supportProtocols;
546 final Collection<String> supportedProtocols = new LinkedList<>(
547 Arrays.asList(sslSocket.getSupportedProtocols()));
548 supportedProtocols.remove("SSLv3");
549 supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]);
550
551 sslSocket.setEnabledProtocols(supportProtocols);
552
553 final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites(
554 sslSocket.getSupportedCipherSuites());
555 //Log.d(Config.LOGTAG, "Using ciphers: " + Arrays.toString(cipherSuites));
556 if (cipherSuites.length > 0) {
557 sslSocket.setEnabledCipherSuites(cipherSuites);
558 }
559
560 if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) {
561 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
562 throw new SecurityException();
563 }
564 tagReader.setInputStream(sslSocket.getInputStream());
565 tagWriter.setOutputStream(sslSocket.getOutputStream());
566 sendStartStream();
567 Log.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established");
568 features.encryptionEnabled = true;
569 processStream(tagReader.readTag());
570 sslSocket.close();
571 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
572 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
573 throw new SecurityException();
574 }
575 }
576
577 private void processStreamFeatures(final Tag currentTag)
578 throws XmlPullParserException, IOException {
579 this.streamFeatures = tagReader.readElement(currentTag);
580 if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) {
581 sendStartTLS();
582 } else if (this.streamFeatures.hasChild("register")
583 && account.isOptionSet(Account.OPTION_REGISTER)
584 && features.encryptionEnabled) {
585 sendRegistryRequest();
586 } else if (!this.streamFeatures.hasChild("register")
587 && account.isOptionSet(Account.OPTION_REGISTER)) {
588 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
589 disconnect(true);
590 } else if (this.streamFeatures.hasChild("mechanisms")
591 && shouldAuthenticate && features.encryptionEnabled) {
592 final List<String> mechanisms = extractMechanisms(streamFeatures
593 .findChild("mechanisms"));
594 final Element auth = new Element("auth");
595 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
596 if (mechanisms.contains("SCRAM-SHA-1")) {
597 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
598 } else if (mechanisms.contains("PLAIN")) {
599 saslMechanism = new Plain(tagWriter, account);
600 } else if (mechanisms.contains("DIGEST-MD5")) {
601 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
602 }
603 if (saslMechanism != null) {
604 final JSONObject keys = account.getKeys();
605 try {
606 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
607 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority()) {
608 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
609 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
610 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
611 "). Possible downgrade attack?");
612 throw new SecurityException();
613 }
614 } catch (final JSONException e) {
615 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
616 }
617 Log.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism());
618 auth.setAttribute("mechanism", saslMechanism.getMechanism());
619 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
620 auth.setContent(saslMechanism.getClientFirstMessage());
621 }
622 tagWriter.writeElement(auth);
623 } else {
624 throw new IncompatibleServerException();
625 }
626 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
627 + smVersion)
628 && streamId != null) {
629 if (Config.EXTENDED_SM_LOGGING) {
630 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived);
631 }
632 final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion);
633 this.tagWriter.writeStanzaAsync(resume);
634 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
635 sendBindRequest();
636 } else {
637 disconnect(true);
638 changeStatus(Account.State.INCOMPATIBLE_SERVER);
639 }
640 }
641
642 private List<String> extractMechanisms(final Element stream) {
643 final ArrayList<String> mechanisms = new ArrayList<>(stream
644 .getChildren().size());
645 for (final Element child : stream.getChildren()) {
646 mechanisms.add(child.getContent());
647 }
648 return mechanisms;
649 }
650
651 private void sendRegistryRequest() {
652 final IqPacket register = new IqPacket(IqPacket.TYPE.GET);
653 register.query("jabber:iq:register");
654 register.setTo(account.getServer());
655 sendIqPacket(register, new OnIqPacketReceived() {
656
657 @Override
658 public void onIqPacketReceived(final Account account, final IqPacket packet) {
659 final Element instructions = packet.query().findChild("instructions");
660 if (packet.query().hasChild("username")
661 && (packet.query().hasChild("password"))) {
662 final IqPacket register = new IqPacket(IqPacket.TYPE.SET);
663 final Element username = new Element("username").setContent(account.getUsername());
664 final Element password = new Element("password").setContent(account.getPassword());
665 register.query("jabber:iq:register").addChild(username);
666 register.query().addChild(password);
667 sendIqPacket(register, new OnIqPacketReceived() {
668
669 @Override
670 public void onIqPacketReceived(final Account account, final IqPacket packet) {
671 if (packet.getType() == IqPacket.TYPE.RESULT) {
672 account.setOption(Account.OPTION_REGISTER,
673 false);
674 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
675 } else if (packet.hasChild("error")
676 && (packet.findChild("error")
677 .hasChild("conflict"))) {
678 changeStatus(Account.State.REGISTRATION_CONFLICT);
679 } else {
680 changeStatus(Account.State.REGISTRATION_FAILED);
681 Log.d(Config.LOGTAG, packet.toString());
682 }
683 disconnect(true);
684 }
685 });
686 } else {
687 changeStatus(Account.State.REGISTRATION_FAILED);
688 disconnect(true);
689 Log.d(Config.LOGTAG, account.getJid().toBareJid()
690 + ": could not register. instructions are"
691 + (instructions != null ? instructions.getContent() : ""));
692 }
693 }
694 });
695 }
696
697 private void sendBindRequest() {
698 while(!mXmppConnectionService.areMessagesInitialized()) {
699 try {
700 Thread.sleep(500);
701 } catch (final InterruptedException ignored) {
702 }
703 }
704 clearIqCallbacks();
705 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
706 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
707 .addChild("resource").setContent(account.getResource());
708 this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() {
709 @Override
710 public void onIqPacketReceived(final Account account, final IqPacket packet) {
711 final Element bind = packet.findChild("bind");
712 if (bind != null) {
713 final Element jid = bind.findChild("jid");
714 if (jid != null && jid.getContent() != null) {
715 try {
716 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
717 } catch (final InvalidJidException e) {
718 // TODO: Handle the case where an external JID is technically invalid?
719 }
720 if (streamFeatures.hasChild("session")) {
721 sendStartSession();
722 } else {
723 sendPostBindInitialization();
724 }
725 } else {
726 Log.d(Config.LOGTAG,account.getJid()+": disconnecting because of bind failure");
727 disconnect(true);
728 }
729 } else {
730 Log.d(Config.LOGTAG,account.getJid()+": disconnecting because of bind failure");
731 disconnect(true);
732 }
733 }
734 });
735 }
736
737 private void clearIqCallbacks() {
738 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": clearing "+this.packetCallbacks.size()+" iq callbacks");
739 final IqPacket failurePacket = new IqPacket(IqPacket.TYPE.ERROR);
740 final ArrayList<OnIqPacketReceived> callbacks = new ArrayList<>();
741 synchronized (this.packetCallbacks) {
742 final Iterator<Pair<IqPacket, OnIqPacketReceived>> iterator = this.packetCallbacks.values().iterator();
743 while (iterator.hasNext()) {
744 Pair<IqPacket, OnIqPacketReceived> entry = iterator.next();
745 callbacks.add(entry.second);
746 }
747 this.packetCallbacks.clear();
748 }
749 for(OnIqPacketReceived callback : callbacks) {
750 callback.onIqPacketReceived(account,failurePacket);
751 }
752 }
753
754 private void sendStartSession() {
755 final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET);
756 startSession.addChild("session", "urn:ietf:params:xml:ns:xmpp-session");
757 this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() {
758 @Override
759 public void onIqPacketReceived(Account account, IqPacket packet) {
760 if (packet.getType() == IqPacket.TYPE.RESULT) {
761 sendPostBindInitialization();
762 } else {
763 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": could not init sessions");
764 disconnect(true);
765 }
766 }
767 });
768 }
769
770 private void sendPostBindInitialization() {
771 smVersion = 0;
772 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
773 smVersion = 3;
774 } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) {
775 smVersion = 2;
776 }
777 if (smVersion != 0) {
778 final EnablePacket enable = new EnablePacket(smVersion);
779 tagWriter.writeStanzaAsync(enable);
780 stanzasSent = 0;
781 mStanzaReceipts.clear();
782 }
783 features.carbonsEnabled = false;
784 features.blockListRequested = false;
785 disco.clear();
786 sendServiceDiscoveryInfo(account.getServer());
787 sendServiceDiscoveryInfo(account.getJid().toBareJid());
788 sendServiceDiscoveryItems(account.getServer());
789 if (bindListener != null) {
790 bindListener.onBind(account);
791 }
792 sendInitialPing();
793 }
794
795 private void sendServiceDiscoveryInfo(final Jid jid) {
796 if (disco.containsKey(jid)) {
797 if (account.getServer().equals(jid)) {
798 enableAdvancedStreamFeatures();
799 }
800 } else {
801 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
802 iq.setTo(jid);
803 iq.query("http://jabber.org/protocol/disco#info");
804 this.sendIqPacket(iq, new OnIqPacketReceived() {
805
806 @Override
807 public void onIqPacketReceived(final Account account, final IqPacket packet) {
808 final List<Element> elements = packet.query().getChildren();
809 final Info info = new Info();
810 for (final Element element : elements) {
811 if (element.getName().equals("identity")) {
812 String type = element.getAttribute("type");
813 String category = element.getAttribute("category");
814 if (type != null && category != null) {
815 info.identities.add(new Pair<>(category,type));
816 }
817 } else if (element.getName().equals("feature")) {
818 info.features.add(element.getAttribute("var"));
819 }
820 }
821 disco.put(jid, info);
822
823 if (account.getServer().equals(jid)) {
824 enableAdvancedStreamFeatures();
825 for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) {
826 listener.onAdvancedStreamFeaturesAvailable(account);
827 }
828 }
829 }
830 });
831 }
832 }
833
834 private void enableAdvancedStreamFeatures() {
835 if (getFeatures().carbons() && !features.carbonsEnabled) {
836 sendEnableCarbons();
837 }
838 if (getFeatures().blocking() && !features.blockListRequested) {
839 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": Requesting block list");
840 this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser());
841 }
842 }
843
844 private void sendServiceDiscoveryItems(final Jid server) {
845 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
846 iq.setTo(server.toDomainJid());
847 iq.query("http://jabber.org/protocol/disco#items");
848 this.sendIqPacket(iq, new OnIqPacketReceived() {
849
850 @Override
851 public void onIqPacketReceived(final Account account, final IqPacket packet) {
852 final List<Element> elements = packet.query().getChildren();
853 for (final Element element : elements) {
854 if (element.getName().equals("item")) {
855 final Jid jid = element.getAttributeAsJid("jid");
856 if (jid != null && !jid.equals(account.getServer())) {
857 sendServiceDiscoveryInfo(jid);
858 }
859 }
860 }
861 }
862 });
863 }
864
865 private void sendEnableCarbons() {
866 final IqPacket iq = new IqPacket(IqPacket.TYPE.SET);
867 iq.addChild("enable", "urn:xmpp:carbons:2");
868 this.sendIqPacket(iq, new OnIqPacketReceived() {
869
870 @Override
871 public void onIqPacketReceived(final Account account, final IqPacket packet) {
872 if (!packet.hasChild("error")) {
873 Log.d(Config.LOGTAG, account.getJid().toBareJid()
874 + ": successfully enabled carbons");
875 features.carbonsEnabled = true;
876 } else {
877 Log.d(Config.LOGTAG, account.getJid().toBareJid()
878 + ": error enableing carbons " + packet.toString());
879 }
880 }
881 });
882 }
883
884 private void processStreamError(final Tag currentTag)
885 throws XmlPullParserException, IOException {
886 final Element streamError = tagReader.readElement(currentTag);
887 if (streamError != null && streamError.hasChild("conflict")) {
888 final String resource = account.getResource().split("\\.")[0];
889 account.setResource(resource + "." + nextRandomId());
890 Log.d(Config.LOGTAG,
891 account.getJid().toBareJid() + ": switching resource due to conflict ("
892 + account.getResource() + ")");
893 } else if (streamError != null) {
894 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": stream error "+streamError.toString());
895 }
896 }
897
898 private void sendStartStream() throws IOException {
899 final Tag stream = Tag.start("stream:stream");
900 stream.setAttribute("from", account.getJid().toBareJid().toString());
901 stream.setAttribute("to", account.getServer().toString());
902 stream.setAttribute("version", "1.0");
903 stream.setAttribute("xml:lang", "en");
904 stream.setAttribute("xmlns", "jabber:client");
905 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
906 tagWriter.writeTag(stream);
907 }
908
909 private String nextRandomId() {
910 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
911 }
912
913 public void sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
914 packet.setFrom(account.getJid());
915 this.sendUnmodifiedIqPacket(packet, callback);
916
917 }
918
919 private synchronized void sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) {
920 if (packet.getId() == null) {
921 final String id = nextRandomId();
922 packet.setAttribute("id", id);
923 }
924 if (callback != null) {
925 synchronized (this.packetCallbacks) {
926 packetCallbacks.put(packet.getId(), new Pair<>(packet, callback));
927 }
928 }
929 this.sendPacket(packet);
930 }
931
932 public void sendMessagePacket(final MessagePacket packet) {
933 this.sendPacket(packet);
934 }
935
936 public void sendPresencePacket(final PresencePacket packet) {
937 this.sendPacket(packet);
938 }
939
940 private synchronized void sendPacket(final AbstractStanza packet) {
941 if (stanzasSent == Integer.MAX_VALUE) {
942 resetStreamId();
943 disconnect(true);
944 return;
945 }
946 final String name = packet.getName();
947 if (name.equals("iq") || name.equals("message") || name.equals("presence")) {
948 ++stanzasSent;
949 }
950 tagWriter.writeStanzaAsync(packet);
951 if ((packet instanceof MessagePacket || packet instanceof IqPacket) && packet.getId() != null && this.streamId != null) {
952 if (Config.EXTENDED_SM_LOGGING) {
953 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for stanza #" + stanzasSent);
954 }
955 this.mStanzaReceipts.put(stanzasSent, packet.getId());
956 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
957 }
958 }
959
960 public void sendPing() {
961 if (streamFeatures.hasChild("sm")) {
962 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
963 } else {
964 final IqPacket iq = new IqPacket(IqPacket.TYPE.GET);
965 iq.setFrom(account.getJid());
966 iq.addChild("ping", "urn:xmpp:ping");
967 this.sendIqPacket(iq, null);
968 }
969 this.lastPingSent = SystemClock.elapsedRealtime();
970 }
971
972 public void setOnMessagePacketReceivedListener(
973 final OnMessagePacketReceived listener) {
974 this.messageListener = listener;
975 }
976
977 public void setOnUnregisteredIqPacketReceivedListener(
978 final OnIqPacketReceived listener) {
979 this.unregisteredIqListener = listener;
980 }
981
982 public void setOnPresencePacketReceivedListener(
983 final OnPresencePacketReceived listener) {
984 this.presenceListener = listener;
985 }
986
987 public void setOnJinglePacketReceivedListener(
988 final OnJinglePacketReceived listener) {
989 this.jingleListener = listener;
990 }
991
992 public void setOnStatusChangedListener(final OnStatusChanged listener) {
993 this.statusListener = listener;
994 }
995
996 public void setOnBindListener(final OnBindListener listener) {
997 this.bindListener = listener;
998 }
999
1000 public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) {
1001 this.acknowledgedListener = listener;
1002 }
1003
1004 public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) {
1005 if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) {
1006 this.advancedStreamFeaturesLoadedListeners.add(listener);
1007 }
1008 }
1009
1010 public void disconnect(final boolean force) {
1011 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
1012 try {
1013 if (force) {
1014 socket.close();
1015 return;
1016 }
1017 new Thread(new Runnable() {
1018
1019 @Override
1020 public void run() {
1021 if (tagWriter.isActive()) {
1022 tagWriter.finish();
1023 try {
1024 while (!tagWriter.finished() && socket.isConnected()) {
1025 Log.d(Config.LOGTAG, "not yet finished");
1026 Thread.sleep(100);
1027 }
1028 tagWriter.writeTag(Tag.end("stream:stream"));
1029 socket.close();
1030 } catch (final IOException e) {
1031 Log.d(Config.LOGTAG,
1032 "io exception during disconnect");
1033 } catch (final InterruptedException e) {
1034 Log.d(Config.LOGTAG, "interrupted");
1035 }
1036 }
1037 }
1038 }).start();
1039 } catch (final IOException e) {
1040 Log.d(Config.LOGTAG, "io exception during disconnect");
1041 }
1042 }
1043
1044 public void resetStreamId() {
1045 this.streamId = null;
1046 }
1047
1048 public List<Jid> findDiscoItemsByFeature(final String feature) {
1049 final List<Jid> items = new ArrayList<>();
1050 for (final Entry<Jid, Info> cursor : disco.entrySet()) {
1051 if (cursor.getValue().features.contains(feature)) {
1052 items.add(cursor.getKey());
1053 }
1054 }
1055 return items;
1056 }
1057
1058 public Jid findDiscoItemByFeature(final String feature) {
1059 final List<Jid> items = findDiscoItemsByFeature(feature);
1060 if (items.size() >= 1) {
1061 return items.get(0);
1062 }
1063 return null;
1064 }
1065
1066 public void r() {
1067 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1068 }
1069
1070 public String getMucServer() {
1071 for (final Entry<Jid, Info> cursor : disco.entrySet()) {
1072 final Info value = cursor.getValue();
1073 if (value.features.contains("http://jabber.org/protocol/muc")
1074 && !value.features.contains("jabber:iq:gateway")
1075 && !value.identities.contains(new Pair<>("conference","irc"))) {
1076 return cursor.getKey().toString();
1077 }
1078 }
1079 return null;
1080 }
1081
1082 public int getTimeToNextAttempt() {
1083 final int interval = (int) (25 * Math.pow(1.5, attempt));
1084 final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1085 return interval - secondsSinceLast;
1086 }
1087
1088 public int getAttempt() {
1089 return this.attempt;
1090 }
1091
1092 public Features getFeatures() {
1093 return this.features;
1094 }
1095
1096 public long getLastSessionEstablished() {
1097 final long diff;
1098 if (this.lastSessionStarted == 0) {
1099 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1100 } else {
1101 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1102 }
1103 return System.currentTimeMillis() - diff;
1104 }
1105
1106 public long getLastConnect() {
1107 return this.lastConnect;
1108 }
1109
1110 public long getLastPingSent() {
1111 return this.lastPingSent;
1112 }
1113
1114 public long getLastPacketReceived() {
1115 return this.lastPacketReceived;
1116 }
1117
1118 public void sendActive() {
1119 this.sendPacket(new ActivePacket());
1120 }
1121
1122 public void sendInactive() {
1123 this.sendPacket(new InactivePacket());
1124 }
1125
1126 public void resetAttemptCount() {
1127 this.attempt = 0;
1128 this.lastConnect = 0;
1129 }
1130
1131 private class Info {
1132 public final ArrayList<String> features = new ArrayList<>();
1133 public final ArrayList<Pair<String,String>> identities = new ArrayList<>();
1134 }
1135
1136 private class UnauthorizedException extends IOException {
1137
1138 }
1139
1140 private class SecurityException extends IOException {
1141
1142 }
1143
1144 private class IncompatibleServerException extends IOException {
1145
1146 }
1147
1148 public class Features {
1149 XmppConnection connection;
1150 private boolean carbonsEnabled = false;
1151 private boolean encryptionEnabled = false;
1152 private boolean blockListRequested = false;
1153
1154 public Features(final XmppConnection connection) {
1155 this.connection = connection;
1156 }
1157
1158 private boolean hasDiscoFeature(final Jid server, final String feature) {
1159 return connection.disco.containsKey(server) &&
1160 connection.disco.get(server).features.contains(feature);
1161 }
1162
1163 public boolean carbons() {
1164 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1165 }
1166
1167 public boolean blocking() {
1168 return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING);
1169 }
1170
1171 public boolean register() {
1172 return hasDiscoFeature(account.getServer(), Xmlns.REGISTER);
1173 }
1174
1175 public boolean sm() {
1176 return streamId != null
1177 || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm"));
1178 }
1179
1180 public boolean csi() {
1181 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1182 }
1183
1184 public boolean pep() {
1185 final Pair<String,String> needle = new Pair<>("pubsub","pep");
1186 Info info = disco.get(account.getServer());
1187 if (info != null && info.identities.contains(needle)) {
1188 return true;
1189 } else {
1190 info = disco.get(account.getJid().toBareJid());
1191 return info != null && info.identities.contains(needle);
1192 }
1193 }
1194
1195 public boolean mam() {
1196 if (hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")) {
1197 return true;
1198 } else {
1199 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1200 }
1201 }
1202
1203 public boolean advancedStreamFeaturesLoaded() {
1204 return disco.containsKey(account.getServer());
1205 }
1206
1207 public boolean rosterVersioning() {
1208 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1209 }
1210
1211 public void setBlockListRequested(boolean value) {
1212 this.blockListRequested = value;
1213 }
1214
1215 public boolean httpUpload() {
1216 return findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD).size() > 0;
1217 }
1218 }
1219
1220 private IqGenerator getIqGenerator() {
1221 return mXmppConnectionService.getIqGenerator();
1222 }
1223}