1package eu.siacs.conversations.xmpp;
2
3import android.content.Context;
4import android.content.SharedPreferences;
5import android.os.Bundle;
6import android.os.Parcelable;
7import android.os.PowerManager;
8import android.os.PowerManager.WakeLock;
9import android.os.SystemClock;
10import android.preference.PreferenceManager;
11import android.util.Log;
12import android.util.SparseArray;
13
14import org.apache.http.conn.ssl.StrictHostnameVerifier;
15import org.json.JSONException;
16import org.json.JSONObject;
17import org.xmlpull.v1.XmlPullParserException;
18
19import java.io.IOException;
20import java.io.InputStream;
21import java.io.OutputStream;
22import java.math.BigInteger;
23import java.net.IDN;
24import java.net.InetAddress;
25import java.net.InetSocketAddress;
26import java.net.Socket;
27import java.net.UnknownHostException;
28import java.security.KeyManagementException;
29import java.security.NoSuchAlgorithmException;
30import java.util.ArrayList;
31import java.util.Arrays;
32import java.util.HashMap;
33import java.util.Hashtable;
34import java.util.LinkedList;
35import java.util.List;
36import java.util.Map.Entry;
37
38import javax.net.ssl.HostnameVerifier;
39import javax.net.ssl.SSLContext;
40import javax.net.ssl.SSLSocket;
41import javax.net.ssl.SSLSocketFactory;
42import javax.net.ssl.X509TrustManager;
43
44import eu.siacs.conversations.Config;
45import eu.siacs.conversations.crypto.sasl.DigestMd5;
46import eu.siacs.conversations.crypto.sasl.Plain;
47import eu.siacs.conversations.crypto.sasl.SaslMechanism;
48import eu.siacs.conversations.crypto.sasl.ScramSha1;
49import eu.siacs.conversations.entities.Account;
50import eu.siacs.conversations.services.XmppConnectionService;
51import eu.siacs.conversations.utils.DNSHelper;
52import eu.siacs.conversations.utils.zlib.ZLibInputStream;
53import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
54import eu.siacs.conversations.xml.Element;
55import eu.siacs.conversations.xml.Tag;
56import eu.siacs.conversations.xml.TagWriter;
57import eu.siacs.conversations.xml.XmlReader;
58import eu.siacs.conversations.xmpp.jid.InvalidJidException;
59import eu.siacs.conversations.xmpp.jid.Jid;
60import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
61import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
62import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
63import eu.siacs.conversations.xmpp.stanzas.IqPacket;
64import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
65import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
66import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
67import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
68import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
69import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
70import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
71import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
72
73public class XmppConnection implements Runnable {
74
75 private static final int PACKET_IQ = 0;
76 private static final int PACKET_MESSAGE = 1;
77 private static final int PACKET_PRESENCE = 2;
78 private final Context applicationContext;
79 protected Account account;
80 private WakeLock wakeLock;
81 private Socket socket;
82 private XmlReader tagReader;
83 private TagWriter tagWriter;
84 private Features features = new Features(this);
85 private boolean shouldBind = true;
86 private boolean shouldAuthenticate = true;
87 private Element streamFeatures;
88 private HashMap<String, List<String>> disco = new HashMap<>();
89
90 private String streamId = null;
91 private int smVersion = 3;
92 private SparseArray<String> messageReceipts = new SparseArray<>();
93
94 private boolean enabledCompression = false;
95 private boolean enabledEncryption = false;
96 private boolean enabledCarbons = false;
97
98 private int stanzasReceived = 0;
99 private int stanzasSent = 0;
100 private long lastPaketReceived = 0;
101 private long lastPingSent = 0;
102 private long lastConnect = 0;
103 private long lastSessionStarted = 0;
104 private int attempt = 0;
105 private Hashtable<String, PacketReceived> 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 OnMessageAcknowledged acknowledgedListener = null;
113 private XmppConnectionService mXmppConnectionService = null;
114
115 private SaslMechanism saslMechanism;
116
117 public XmppConnection(Account account, XmppConnectionService service) {
118 this.account = account;
119 this.wakeLock = service.getPowerManager().newWakeLock(
120 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
121 tagWriter = new TagWriter();
122 mXmppConnectionService = service;
123 applicationContext = service.getApplicationContext();
124 }
125
126 protected void changeStatus(final Account.State nextStatus) {
127 if (account.getStatus() != nextStatus) {
128 if ((nextStatus == Account.State.OFFLINE)
129 && (account.getStatus() != Account.State.CONNECTING)
130 && (account.getStatus() != Account.State.ONLINE)
131 && (account.getStatus() != Account.State.DISABLED)) {
132 return;
133 }
134 if (nextStatus == Account.State.ONLINE) {
135 this.attempt = 0;
136 }
137 account.setStatus(nextStatus);
138 if (statusListener != null) {
139 statusListener.onStatusChanged(account);
140 }
141 }
142 }
143
144 protected void connect() {
145 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting");
146 enabledCompression = false;
147 enabledEncryption = false;
148 lastConnect = SystemClock.elapsedRealtime();
149 lastPingSent = SystemClock.elapsedRealtime();
150 this.attempt++;
151 try {
152 shouldAuthenticate = shouldBind = !account
153 .isOptionSet(Account.OPTION_REGISTER);
154 tagReader = new XmlReader(wakeLock);
155 tagWriter = new TagWriter();
156 packetCallbacks.clear();
157 this.changeStatus(Account.State.CONNECTING);
158 Bundle result = DNSHelper.getSRVRecord(account.getServer());
159 ArrayList<Parcelable> values = result.getParcelableArrayList("values");
160 if ("timeout".equals(result.getString("error"))) {
161 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": dns timeout");
162 this.changeStatus(Account.State.OFFLINE);
163 return;
164 } else if (values != null) {
165 int i = 0;
166 boolean socketError = true;
167 while (socketError && values.size() > i) {
168 Bundle namePort = (Bundle) values.get(i);
169 try {
170 String srvRecordServer;
171 try {
172 srvRecordServer=IDN.toASCII(namePort.getString("name"));
173 } catch (final IllegalArgumentException e) {
174 // TODO: Handle me?`
175 srvRecordServer = "";
176 }
177 int srvRecordPort = namePort.getInt("port");
178 String srvIpServer = namePort.getString("ipv4");
179 InetSocketAddress addr;
180 if (srvIpServer != null) {
181 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
182 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
183 + ": using values from dns " + srvRecordServer
184 + "[" + srvIpServer + "]:" + srvRecordPort);
185 } else {
186 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
187 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
188 + ": using values from dns "
189 + srvRecordServer + ":" + srvRecordPort);
190 }
191 socket = new Socket();
192 socket.connect(addr, 20000);
193 socketError = false;
194 } catch (UnknownHostException e) {
195 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
196 i++;
197 } catch (IOException e) {
198 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
199 i++;
200 }
201 }
202 if (socketError) {
203 this.changeStatus(Account.State.SERVER_NOT_FOUND);
204 if (wakeLock.isHeld()) {
205 try {
206 wakeLock.release();
207 } catch (final RuntimeException ignored) {
208 }
209 }
210 return;
211 }
212 } else if (result.containsKey("error")
213 && "nosrv".equals(result.getString("error", null))) {
214 socket = new Socket(account.getServer().getDomainpart(), 5222);
215 } else {
216 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
217 + ": timeout in DNS resolution");
218 changeStatus(Account.State.OFFLINE);
219 return;
220 }
221 OutputStream out = socket.getOutputStream();
222 tagWriter.setOutputStream(out);
223 InputStream in = socket.getInputStream();
224 tagReader.setInputStream(in);
225 tagWriter.beginDocument();
226 sendStartStream();
227 Tag nextTag;
228 while ((nextTag = tagReader.readTag()) != null) {
229 if (nextTag.isStart("stream")) {
230 processStream(nextTag);
231 break;
232 } else {
233 Log.d(Config.LOGTAG,
234 "found unexpected tag: " + nextTag.getName());
235 return;
236 }
237 }
238 if (socket.isConnected()) {
239 socket.close();
240 }
241 } catch (UnknownHostException e) {
242 this.changeStatus(Account.State.SERVER_NOT_FOUND);
243 if (wakeLock.isHeld()) {
244 try {
245 wakeLock.release();
246 } catch (final RuntimeException ignored) {
247 }
248 }
249 } catch (final IOException | XmlPullParserException e) {
250 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
251 this.changeStatus(Account.State.OFFLINE);
252 if (wakeLock.isHeld()) {
253 try {
254 wakeLock.release();
255 } catch (final RuntimeException ignored) {
256 }
257 }
258 } catch (NoSuchAlgorithmException e) {
259 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
260 this.changeStatus(Account.State.OFFLINE);
261 Log.d(Config.LOGTAG, "compression exception " + e.getMessage());
262 if (wakeLock.isHeld()) {
263 try {
264 wakeLock.release();
265 } catch (final RuntimeException ignored) {
266 }
267 }
268 }
269
270 }
271
272 @Override
273 public void run() {
274 connect();
275 }
276
277 private void processStream(final Tag currentTag) throws XmlPullParserException,
278 IOException, NoSuchAlgorithmException {
279 Tag nextTag = tagReader.readTag();
280
281 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
282 if (nextTag.isStart("error")) {
283 processStreamError(nextTag);
284 } else if (nextTag.isStart("features")) {
285 processStreamFeatures(nextTag);
286 } else if (nextTag.isStart("proceed")) {
287 switchOverToTls(nextTag);
288 } else if (nextTag.isStart("compressed")) {
289 switchOverToZLib(nextTag);
290 } else if (nextTag.isStart("success")) {
291 final String challenge = tagReader.readElement(nextTag).getContent();
292 try {
293 saslMechanism.getResponse(challenge);
294 } catch (final SaslMechanism.AuthenticationException e) {
295 disconnect(true);
296 Log.e(Config.LOGTAG, String.valueOf(e));
297 }
298 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
299 account.setKey(Account.PINNED_MECHANISM_KEY,
300 String.valueOf(saslMechanism.getPriority()));
301 tagReader.reset();
302 sendStartStream();
303 processStream(tagReader.readTag());
304 break;
305 } else if (nextTag.isStart("failure")) {
306 tagReader.readElement(nextTag);
307 changeStatus(Account.State.UNAUTHORIZED);
308 } else if (nextTag.isStart("challenge")) {
309 final String challenge = tagReader.readElement(nextTag).getContent();
310 final Element response = new Element("response");
311 response.setAttribute("xmlns",
312 "urn:ietf:params:xml:ns:xmpp-sasl");
313 try {
314 response.setContent(saslMechanism.getResponse(challenge));
315 } catch (final SaslMechanism.AuthenticationException e) {
316 // TODO: Send auth abort tag.
317 Log.e(Config.LOGTAG, e.toString());
318 }
319 tagWriter.writeElement(response);
320 } else if (nextTag.isStart("enabled")) {
321 Element enabled = tagReader.readElement(nextTag);
322 if ("true".equals(enabled.getAttribute("resume"))) {
323 this.streamId = enabled.getAttribute("id");
324 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
325 + ": stream managment(" + smVersion
326 + ") enabled (resumable)");
327 } else {
328 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
329 + ": stream managment(" + smVersion + ") enabled");
330 }
331 this.lastSessionStarted = SystemClock.elapsedRealtime();
332 this.stanzasReceived = 0;
333 RequestPacket r = new RequestPacket(smVersion);
334 tagWriter.writeStanzaAsync(r);
335 } else if (nextTag.isStart("resumed")) {
336 lastPaketReceived = SystemClock.elapsedRealtime();
337 Element resumed = tagReader.readElement(nextTag);
338 String h = resumed.getAttribute("h");
339 try {
340 int serverCount = Integer.parseInt(h);
341 if (serverCount != stanzasSent) {
342 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
343 + ": session resumed with lost packages");
344 stanzasSent = serverCount;
345 } else {
346 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
347 + ": session resumed");
348 }
349 if (acknowledgedListener != null) {
350 for (int i = 0; i < messageReceipts.size(); ++i) {
351 if (serverCount >= messageReceipts.keyAt(i)) {
352 acknowledgedListener.onMessageAcknowledged(
353 account, messageReceipts.valueAt(i));
354 }
355 }
356 }
357 messageReceipts.clear();
358 } catch (final NumberFormatException ignored) {
359
360 }
361 sendServiceDiscoveryInfo(account.getServer());
362 sendServiceDiscoveryItems(account.getServer());
363 sendInitialPing();
364 } else if (nextTag.isStart("r")) {
365 tagReader.readElement(nextTag);
366 AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
367 tagWriter.writeStanzaAsync(ack);
368 } else if (nextTag.isStart("a")) {
369 Element ack = tagReader.readElement(nextTag);
370 lastPaketReceived = SystemClock.elapsedRealtime();
371 int serverSequence = Integer.parseInt(ack.getAttribute("h"));
372 String msgId = this.messageReceipts.get(serverSequence);
373 if (msgId != null) {
374 if (this.acknowledgedListener != null) {
375 this.acknowledgedListener.onMessageAcknowledged(
376 account, msgId);
377 }
378 this.messageReceipts.remove(serverSequence);
379 }
380 } else if (nextTag.isStart("failed")) {
381 tagReader.readElement(nextTag);
382 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
383 streamId = null;
384 if (account.getStatus() != Account.State.ONLINE) {
385 sendBindRequest();
386 }
387 } else if (nextTag.isStart("iq")) {
388 processIq(nextTag);
389 } else if (nextTag.isStart("message")) {
390 processMessage(nextTag);
391 } else if (nextTag.isStart("presence")) {
392 processPresence(nextTag);
393 }
394 nextTag = tagReader.readTag();
395 }
396 if (account.getStatus() == Account.State.ONLINE) {
397 account. setStatus(Account.State.OFFLINE);
398 if (statusListener != null) {
399 statusListener.onStatusChanged(account);
400 }
401 }
402 }
403
404 private void sendInitialPing() {
405 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
406 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
407 iq.setFrom(account.getJid());
408 iq.addChild("ping", "urn:xmpp:ping");
409 this.sendIqPacket(iq, new OnIqPacketReceived() {
410
411 @Override
412 public void onIqPacketReceived(Account account, IqPacket packet) {
413 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
414 + ": online with resource " + account.getResource());
415 changeStatus(Account.State.ONLINE);
416 }
417 });
418 }
419
420 private Element processPacket(Tag currentTag, int packetType)
421 throws XmlPullParserException, IOException {
422 Element element;
423 switch (packetType) {
424 case PACKET_IQ:
425 element = new IqPacket();
426 break;
427 case PACKET_MESSAGE:
428 element = new MessagePacket();
429 break;
430 case PACKET_PRESENCE:
431 element = new PresencePacket();
432 break;
433 default:
434 return null;
435 }
436 element.setAttributes(currentTag.getAttributes());
437 Tag nextTag = tagReader.readTag();
438 if (nextTag == null) {
439 throw new IOException("interrupted mid tag");
440 }
441 while (!nextTag.isEnd(element.getName())) {
442 if (!nextTag.isNo()) {
443 Element child = tagReader.readElement(nextTag);
444 String type = currentTag.getAttribute("type");
445 if (packetType == PACKET_IQ
446 && "jingle".equals(child.getName())
447 && ("set".equalsIgnoreCase(type) || "get"
448 .equalsIgnoreCase(type))) {
449 element = new JinglePacket();
450 element.setAttributes(currentTag.getAttributes());
451 }
452 element.addChild(child);
453 }
454 nextTag = tagReader.readTag();
455 if (nextTag == null) {
456 throw new IOException("interrupted mid tag");
457 }
458 }
459 ++stanzasReceived;
460 lastPaketReceived = SystemClock.elapsedRealtime();
461 return element;
462 }
463
464 private void processIq(Tag currentTag) throws XmlPullParserException,
465 IOException {
466 IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
467
468 if (packet.getId() == null) {
469 return; // an iq packet without id is definitely invalid
470 }
471
472 if (packet instanceof JinglePacket) {
473 if (this.jingleListener != null) {
474 this.jingleListener.onJinglePacketReceived(account,
475 (JinglePacket) packet);
476 }
477 } else {
478 if (packetCallbacks.containsKey(packet.getId())) {
479 if (packetCallbacks.get(packet.getId()) instanceof OnIqPacketReceived) {
480 ((OnIqPacketReceived) packetCallbacks.get(packet.getId()))
481 .onIqPacketReceived(account, packet);
482 }
483
484 packetCallbacks.remove(packet.getId());
485 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
486 .getType() == IqPacket.TYPE_SET)
487 && this.unregisteredIqListener != null) {
488 this.unregisteredIqListener.onIqPacketReceived(account, packet);
489 }
490 }
491 }
492
493 private void processMessage(Tag currentTag) throws XmlPullParserException,
494 IOException {
495 MessagePacket packet = (MessagePacket) processPacket(currentTag,
496 PACKET_MESSAGE);
497 String id = packet.getAttribute("id");
498 if ((id != null) && (packetCallbacks.containsKey(id))) {
499 if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
500 ((OnMessagePacketReceived) packetCallbacks.get(id))
501 .onMessagePacketReceived(account, packet);
502 }
503 packetCallbacks.remove(id);
504 } else if (this.messageListener != null) {
505 this.messageListener.onMessagePacketReceived(account, packet);
506 }
507 }
508
509 private void processPresence(Tag currentTag) throws XmlPullParserException,
510 IOException {
511 PresencePacket packet = (PresencePacket) processPacket(currentTag,
512 PACKET_PRESENCE);
513 String id = packet.getAttribute("id");
514 if ((id != null) && (packetCallbacks.containsKey(id))) {
515 if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
516 ((OnPresencePacketReceived) packetCallbacks.get(id))
517 .onPresencePacketReceived(account, packet);
518 }
519 packetCallbacks.remove(id);
520 } else if (this.presenceListener != null) {
521 this.presenceListener.onPresencePacketReceived(account, packet);
522 }
523 }
524
525 private void sendCompressionZlib() throws IOException {
526 Element compress = new Element("compress");
527 compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
528 compress.addChild("method").setContent("zlib");
529 tagWriter.writeElement(compress);
530 }
531
532 private void switchOverToZLib(final Tag currentTag)
533 throws XmlPullParserException, IOException,
534 NoSuchAlgorithmException {
535 tagReader.readTag(); // read tag close
536 tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
537 .getOutputStream()));
538 tagReader
539 .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
540
541 sendStartStream();
542 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": compression enabled");
543 enabledCompression = true;
544 processStream(tagReader.readTag());
545 }
546
547 private void sendStartTLS() throws IOException {
548 Tag startTLS = Tag.empty("starttls");
549 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
550 tagWriter.writeTag(startTLS);
551 }
552
553 private SharedPreferences getPreferences() {
554 return PreferenceManager
555 .getDefaultSharedPreferences(applicationContext);
556 }
557
558 private boolean enableLegacySSL() {
559 return getPreferences().getBoolean("enable_legacy_ssl", false);
560 }
561
562 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException,
563 IOException {
564 tagReader.readTag();
565 try {
566 SSLContext sc = SSLContext.getInstance("TLS");
567 sc.init(null,
568 new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},
569 mXmppConnectionService.getRNG());
570 SSLSocketFactory factory = sc.getSocketFactory();
571
572 if (factory == null) {
573 throw new IOException("SSLSocketFactory was null");
574 }
575
576 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
577
578 if (socket == null || socket.isClosed()) {
579 throw new IOException("socket null or closed");
580 }
581 final InetAddress address = socket.getInetAddress();
582 if (address == null) {
583 throw new IOException("socket address was null");
584 }
585
586 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true);
587
588 // Support all protocols except legacy SSL.
589 // The min SDK version prevents us having to worry about SSLv2. In
590 // future, this may be true of SSLv3 as well.
591 final String[] supportProtocols;
592 if (enableLegacySSL()) {
593 supportProtocols = sslSocket.getSupportedProtocols();
594 } else {
595 final List<String> supportedProtocols = new LinkedList<>(
596 Arrays.asList(sslSocket.getSupportedProtocols()));
597 supportedProtocols.remove("SSLv3");
598 supportProtocols = new String[supportedProtocols.size()];
599 supportedProtocols.toArray(supportProtocols);
600 }
601 sslSocket.setEnabledProtocols(supportProtocols);
602
603 if (verifier != null
604 && !verifier.verify(account.getServer().getDomainpart(),
605 sslSocket.getSession())) {
606 Log.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed");
607 disconnect(true);
608 changeStatus(Account.State.SECURITY_ERROR);
609 }
610 tagReader.setInputStream(sslSocket.getInputStream());
611 tagWriter.setOutputStream(sslSocket.getOutputStream());
612 sendStartStream();
613 Log.d(Config.LOGTAG, account.getJid().toBareJid()
614 + ": TLS connection established");
615 enabledEncryption = true;
616 processStream(tagReader.readTag());
617 sslSocket.close();
618 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
619 e1.printStackTrace();
620 }
621 }
622
623 private void processStreamFeatures(Tag currentTag)
624 throws XmlPullParserException, IOException {
625 this.streamFeatures = tagReader.readElement(currentTag);
626 if (this.streamFeatures.hasChild("starttls") && !enabledEncryption) {
627 sendStartTLS();
628 } else if (compressionAvailable()) {
629 sendCompressionZlib();
630 } else if (this.streamFeatures.hasChild("register")
631 && account.isOptionSet(Account.OPTION_REGISTER)
632 && enabledEncryption) {
633 sendRegistryRequest();
634 } else if (!this.streamFeatures.hasChild("register")
635 && account.isOptionSet(Account.OPTION_REGISTER)) {
636 changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED);
637 disconnect(true);
638 } else if (this.streamFeatures.hasChild("mechanisms")
639 && shouldAuthenticate && enabledEncryption) {
640 final List<String> mechanisms = extractMechanisms(streamFeatures
641 .findChild("mechanisms"));
642 final Element auth = new Element("auth");
643 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
644 if (mechanisms.contains("SCRAM-SHA-1")) {
645 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
646 } else if (mechanisms.contains("DIGEST-MD5")) {
647 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
648 } else if (mechanisms.contains("PLAIN")) {
649 saslMechanism = new Plain(tagWriter, account);
650 }
651 final JSONObject keys = account.getKeys();
652 try {
653 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
654 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority() ) {
655 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
656 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
657 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
658 "). Possible downgrade attack?");
659 disconnect(true);
660 changeStatus(Account.State.SECURITY_ERROR);
661 }
662 } catch (final JSONException e) {
663 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
664 }
665 Log.d(Config.LOGTAG,account.getJid().toString()+": Authenticating with " + saslMechanism.getMechanism());
666 auth.setAttribute("mechanism", saslMechanism.getMechanism());
667 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
668 auth.setContent(saslMechanism.getClientFirstMessage());
669 }
670 tagWriter.writeElement(auth);
671 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
672 + smVersion)
673 && streamId != null) {
674 ResumePacket resume = new ResumePacket(this.streamId,
675 stanzasReceived, smVersion);
676 this.tagWriter.writeStanzaAsync(resume);
677 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
678 sendBindRequest();
679 } else {
680 disconnect(true);
681 changeStatus(Account.State.INCOMPATIBLE_SERVER);
682 }
683 }
684
685 private boolean compressionAvailable() {
686 if (!this.streamFeatures.hasChild("compression",
687 "http://jabber.org/features/compress"))
688 return false;
689 if (!ZLibOutputStream.SUPPORTED)
690 return false;
691 if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
692 return false;
693
694 Element compression = this.streamFeatures.findChild("compression",
695 "http://jabber.org/features/compress");
696 for (Element child : compression.getChildren()) {
697 if (!"method".equals(child.getName()))
698 continue;
699
700 if ("zlib".equalsIgnoreCase(child.getContent())) {
701 return true;
702 }
703 }
704 return false;
705 }
706
707 private List<String> extractMechanisms(Element stream) {
708 ArrayList<String> mechanisms = new ArrayList<>(stream
709 .getChildren().size());
710 for (Element child : stream.getChildren()) {
711 mechanisms.add(child.getContent());
712 }
713 return mechanisms;
714 }
715
716 private void sendRegistryRequest() {
717 IqPacket register = new IqPacket(IqPacket.TYPE_GET);
718 register.query("jabber:iq:register");
719 register.setTo(account.getServer());
720 sendIqPacket(register, new OnIqPacketReceived() {
721
722 @Override
723 public void onIqPacketReceived(Account account, IqPacket packet) {
724 Element instructions = packet.query().findChild("instructions");
725 if (packet.query().hasChild("username")
726 && (packet.query().hasChild("password"))) {
727 IqPacket register = new IqPacket(IqPacket.TYPE_SET);
728 Element username = new Element("username")
729 .setContent(account.getUsername());
730 Element password = new Element("password")
731 .setContent(account.getPassword());
732 register.query("jabber:iq:register").addChild(username);
733 register.query().addChild(password);
734 sendIqPacket(register, new OnIqPacketReceived() {
735
736 @Override
737 public void onIqPacketReceived(Account account,
738 IqPacket packet) {
739 if (packet.getType() == IqPacket.TYPE_RESULT) {
740 account.setOption(Account.OPTION_REGISTER,
741 false);
742 changeStatus(Account.State.REGISTRATION_SUCCESSFUL);
743 } else if (packet.hasChild("error")
744 && (packet.findChild("error")
745 .hasChild("conflict"))) {
746 changeStatus(Account.State.REGISTRATION_CONFLICT);
747 } else {
748 changeStatus(Account.State.REGISTRATION_FAILED);
749 Log.d(Config.LOGTAG, packet.toString());
750 }
751 disconnect(true);
752 }
753 });
754 } else {
755 changeStatus(Account.State.REGISTRATION_FAILED);
756 disconnect(true);
757 Log.d(Config.LOGTAG, account.getJid().toBareJid()
758 + ": could not register. instructions are"
759 + instructions.getContent());
760 }
761 }
762 });
763 }
764
765 private void sendBindRequest() throws IOException {
766 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
767 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
768 .addChild("resource").setContent(account.getResource());
769 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
770 @Override
771 public void onIqPacketReceived(Account account, IqPacket packet) {
772 Element bind = packet.findChild("bind");
773 if (bind != null) {
774 final Element jid = bind.findChild("jid");
775 if (jid != null && jid.getContent() != null) {
776 try {
777 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
778 } catch (final InvalidJidException e) {
779 // TODO: Handle the case where an external JID is technically invalid?
780 }
781 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
782 smVersion = 3;
783 EnablePacket enable = new EnablePacket(smVersion);
784 tagWriter.writeStanzaAsync(enable);
785 stanzasSent = 0;
786 messageReceipts.clear();
787 } else if (streamFeatures.hasChild("sm",
788 "urn:xmpp:sm:2")) {
789 smVersion = 2;
790 EnablePacket enable = new EnablePacket(smVersion);
791 tagWriter.writeStanzaAsync(enable);
792 stanzasSent = 0;
793 messageReceipts.clear();
794 }
795 enabledCarbons = false;
796 disco.clear();
797 sendServiceDiscoveryInfo(account.getServer());
798 sendServiceDiscoveryItems(account.getServer());
799 if (bindListener != null) {
800 bindListener.onBind(account);
801 }
802 sendInitialPing();
803 } else {
804 disconnect(true);
805 }
806 } else {
807 disconnect(true);
808 }
809 }
810 });
811 if (this.streamFeatures.hasChild("session")) {
812 Log.d(Config.LOGTAG, account.getJid().toBareJid()
813 + ": sending deprecated session");
814 IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
815 startSession.addChild("session",
816 "urn:ietf:params:xml:ns:xmpp-session");
817 this.sendUnboundIqPacket(startSession, null);
818 }
819 }
820
821 private void sendServiceDiscoveryInfo(final Jid server) {
822 if (disco.containsKey(server.toDomainJid().toString())) {
823 if (account.getServer().equals(server.toDomainJid())) {
824 enableAdvancedStreamFeatures();
825 }
826 } else {
827 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
828 iq.setTo(server.toDomainJid());
829 iq.query("http://jabber.org/protocol/disco#info");
830 this.sendIqPacket(iq, new OnIqPacketReceived() {
831
832 @Override
833 public void onIqPacketReceived(Account account, IqPacket packet) {
834 final List<Element> elements = packet.query().getChildren();
835 final List<String> features = new ArrayList<>();
836 for (Element element : elements) {
837 if (element.getName().equals("feature")) {
838 features.add(element.getAttribute("var"));
839 }
840 }
841 disco.put(server.toDomainJid().toString(), features);
842
843 if (account.getServer().equals(server.toDomainJid())) {
844 enableAdvancedStreamFeatures();
845 }
846 }
847 });
848 }
849 }
850
851 private void enableAdvancedStreamFeatures() {
852 if (getFeatures().carbons()) {
853 if (!enabledCarbons) {
854 sendEnableCarbons();
855 }
856 }
857 }
858
859 private void sendServiceDiscoveryItems(final Jid server) {
860 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
861 iq.setTo(server.toDomainJid());
862 iq.query("http://jabber.org/protocol/disco#items");
863 this.sendIqPacket(iq, new OnIqPacketReceived() {
864
865 @Override
866 public void onIqPacketReceived(Account account, IqPacket packet) {
867 List<Element> elements = packet.query().getChildren();
868 for (Element element : elements) {
869 if (element.getName().equals("item")) {
870 final String jid = element.getAttribute("jid");
871 try {
872 sendServiceDiscoveryInfo(Jid.fromString(jid).toDomainJid());
873 } catch (final InvalidJidException ignored) {
874 // TODO: Handle the case where an external JID is technically invalid?
875 }
876 }
877 }
878 }
879 });
880 }
881
882 private void sendEnableCarbons() {
883 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
884 iq.addChild("enable", "urn:xmpp:carbons:2");
885 this.sendIqPacket(iq, new OnIqPacketReceived() {
886
887 @Override
888 public void onIqPacketReceived(Account account, IqPacket packet) {
889 if (!packet.hasChild("error")) {
890 Log.d(Config.LOGTAG, account.getJid().toBareJid()
891 + ": successfully enabled carbons");
892 enabledCarbons = true;
893 } else {
894 Log.d(Config.LOGTAG, account.getJid().toBareJid()
895 + ": error enableing carbons " + packet.toString());
896 }
897 }
898 });
899 }
900
901 private void processStreamError(Tag currentTag)
902 throws XmlPullParserException, IOException {
903 Element streamError = tagReader.readElement(currentTag);
904 if (streamError != null && streamError.hasChild("conflict")) {
905 final String resource = account.getResource().split("\\.")[0];
906 account.setResource(resource + "." + nextRandomId());
907 Log.d(Config.LOGTAG,
908 account.getJid().toBareJid() + ": switching resource due to conflict ("
909 + account.getResource() + ")");
910 }
911 }
912
913 private void sendStartStream() throws IOException {
914 Tag stream = Tag.start("stream:stream");
915 stream.setAttribute("from", account.getJid().toBareJid().toString());
916 stream.setAttribute("to", account.getServer().toString());
917 stream.setAttribute("version", "1.0");
918 stream.setAttribute("xml:lang", "en");
919 stream.setAttribute("xmlns", "jabber:client");
920 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
921 tagWriter.writeTag(stream);
922 }
923
924 private String nextRandomId() {
925 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
926 }
927
928 public void sendIqPacket(IqPacket packet, OnIqPacketReceived callback) {
929 if (packet.getId() == null) {
930 String id = nextRandomId();
931 packet.setAttribute("id", id);
932 }
933 packet.setFrom(account.getJid());
934 this.sendPacket(packet, callback);
935 }
936
937 public void sendUnboundIqPacket(IqPacket packet, OnIqPacketReceived callback) {
938 if (packet.getId() == null) {
939 String id = nextRandomId();
940 packet.setAttribute("id", id);
941 }
942 this.sendPacket(packet, callback);
943 }
944
945 public void sendMessagePacket(MessagePacket packet) {
946 this.sendPacket(packet, null);
947 }
948
949 public void sendPresencePacket(PresencePacket packet) {
950 this.sendPacket(packet, null);
951 }
952
953 private synchronized void sendPacket(final AbstractStanza packet,
954 PacketReceived callback) {
955 if (packet.getName().equals("iq") || packet.getName().equals("message")
956 || packet.getName().equals("presence")) {
957 ++stanzasSent;
958 }
959 tagWriter.writeStanzaAsync(packet);
960 if (packet instanceof MessagePacket && packet.getId() != null
961 && this.streamId != null) {
962 Log.d(Config.LOGTAG, "request delivery report for stanza "
963 + stanzasSent);
964 this.messageReceipts.put(stanzasSent, packet.getId());
965 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
966 }
967 if (callback != null) {
968 if (packet.getId() == null) {
969 packet.setId(nextRandomId());
970 }
971 packetCallbacks.put(packet.getId(), callback);
972 }
973 }
974
975 public void sendPing() {
976 if (streamFeatures.hasChild("sm")) {
977 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
978 } else {
979 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
980 iq.setFrom(account.getJid());
981 iq.addChild("ping", "urn:xmpp:ping");
982 this.sendIqPacket(iq, null);
983 }
984 this.lastPingSent = SystemClock.elapsedRealtime();
985 }
986
987 public void setOnMessagePacketReceivedListener(
988 OnMessagePacketReceived listener) {
989 this.messageListener = listener;
990 }
991
992 public void setOnUnregisteredIqPacketReceivedListener(
993 OnIqPacketReceived listener) {
994 this.unregisteredIqListener = listener;
995 }
996
997 public void setOnPresencePacketReceivedListener(
998 OnPresencePacketReceived listener) {
999 this.presenceListener = listener;
1000 }
1001
1002 public void setOnJinglePacketReceivedListener(
1003 OnJinglePacketReceived listener) {
1004 this.jingleListener = listener;
1005 }
1006
1007 public void setOnStatusChangedListener(OnStatusChanged listener) {
1008 this.statusListener = listener;
1009 }
1010
1011 public void setOnBindListener(OnBindListener listener) {
1012 this.bindListener = listener;
1013 }
1014
1015 public void setOnMessageAcknowledgeListener(OnMessageAcknowledged listener) {
1016 this.acknowledgedListener = listener;
1017 }
1018
1019 public void disconnect(boolean force) {
1020 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
1021 try {
1022 if (force) {
1023 socket.close();
1024 return;
1025 }
1026 new Thread(new Runnable() {
1027
1028 @Override
1029 public void run() {
1030 if (tagWriter.isActive()) {
1031 tagWriter.finish();
1032 try {
1033 while (!tagWriter.finished()) {
1034 Log.d(Config.LOGTAG, "not yet finished");
1035 Thread.sleep(100);
1036 }
1037 tagWriter.writeTag(Tag.end("stream:stream"));
1038 socket.close();
1039 } catch (IOException e) {
1040 Log.d(Config.LOGTAG,
1041 "io exception during disconnect");
1042 } catch (InterruptedException e) {
1043 Log.d(Config.LOGTAG, "interrupted");
1044 }
1045 }
1046 }
1047 }).start();
1048 } catch (IOException e) {
1049 Log.d(Config.LOGTAG, "io exception during disconnect");
1050 }
1051 }
1052
1053 public List<String> findDiscoItemsByFeature(String feature) {
1054 final List<String> items = new ArrayList<>();
1055 for (Entry<String, List<String>> cursor : disco.entrySet()) {
1056 if (cursor.getValue().contains(feature)) {
1057 items.add(cursor.getKey());
1058 }
1059 }
1060 return items;
1061 }
1062
1063 public String findDiscoItemByFeature(String feature) {
1064 List<String> items = findDiscoItemsByFeature(feature);
1065 if (items.size() >= 1) {
1066 return items.get(0);
1067 }
1068 return null;
1069 }
1070
1071 public void r() {
1072 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1073 }
1074
1075 public String getMucServer() {
1076 return findDiscoItemByFeature("http://jabber.org/protocol/muc");
1077 }
1078
1079 public int getTimeToNextAttempt() {
1080 int interval = (int) (25 * Math.pow(1.5, attempt));
1081 int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1082 return interval - secondsSinceLast;
1083 }
1084
1085 public int getAttempt() {
1086 return this.attempt;
1087 }
1088
1089 public Features getFeatures() {
1090 return this.features;
1091 }
1092
1093 public long getLastSessionEstablished() {
1094 long diff;
1095 if (this.lastSessionStarted == 0) {
1096 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1097 } else {
1098 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1099 }
1100 return System.currentTimeMillis() - diff;
1101 }
1102
1103 public long getLastConnect() {
1104 return this.lastConnect;
1105 }
1106
1107 public long getLastPingSent() {
1108 return this.lastPingSent;
1109 }
1110
1111 public long getLastPacketReceived() {
1112 return this.lastPaketReceived;
1113 }
1114
1115 public void sendActive() {
1116 this.sendPacket(new ActivePacket(), null);
1117 }
1118
1119 public void sendInactive() {
1120 this.sendPacket(new InactivePacket(), null);
1121 }
1122
1123 public class Features {
1124 XmppConnection connection;
1125
1126 public Features(XmppConnection connection) {
1127 this.connection = connection;
1128 }
1129
1130 private boolean hasDiscoFeature(final Jid server, final String feature) {
1131 return connection.disco.containsKey(server.toDomainJid().toString()) &&
1132 connection.disco.get(server.toDomainJid().toString()).contains(feature);
1133 }
1134
1135 public boolean carbons() {
1136 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1137 }
1138
1139 public boolean sm() {
1140 return streamId != null;
1141 }
1142
1143 public boolean csi() {
1144 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1145 }
1146
1147 public boolean pubsub() {
1148 return hasDiscoFeature(account.getServer(),
1149 "http://jabber.org/protocol/pubsub#publish");
1150 }
1151
1152 public boolean mam() {
1153 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1154 }
1155
1156 public boolean rosterVersioning() {
1157 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1158 }
1159
1160 public boolean streamhost() {
1161 return connection
1162 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1163 }
1164
1165 public boolean compression() {
1166 return connection.enabledCompression;
1167 }
1168 }
1169}