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.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.HashMap;
32import java.util.Hashtable;
33import java.util.LinkedList;
34import java.util.List;
35import java.util.Map.Entry;
36
37import javax.net.ssl.HostnameVerifier;
38import javax.net.ssl.SSLContext;
39import javax.net.ssl.SSLSocket;
40import javax.net.ssl.SSLSocketFactory;
41import javax.net.ssl.X509TrustManager;
42
43import eu.siacs.conversations.Config;
44import eu.siacs.conversations.crypto.sasl.DigestMd5;
45import eu.siacs.conversations.crypto.sasl.Plain;
46import eu.siacs.conversations.crypto.sasl.SaslMechanism;
47import eu.siacs.conversations.crypto.sasl.ScramSha1;
48import eu.siacs.conversations.entities.Account;
49import eu.siacs.conversations.services.XmppConnectionService;
50import eu.siacs.conversations.utils.DNSHelper;
51import eu.siacs.conversations.utils.zlib.ZLibInputStream;
52import eu.siacs.conversations.utils.zlib.ZLibOutputStream;
53import eu.siacs.conversations.xml.Element;
54import eu.siacs.conversations.xml.Tag;
55import eu.siacs.conversations.xml.TagWriter;
56import eu.siacs.conversations.xml.XmlReader;
57import eu.siacs.conversations.xmpp.jid.InvalidJidException;
58import eu.siacs.conversations.xmpp.jid.Jid;
59import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived;
60import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket;
61import eu.siacs.conversations.xmpp.stanzas.AbstractStanza;
62import eu.siacs.conversations.xmpp.stanzas.IqPacket;
63import eu.siacs.conversations.xmpp.stanzas.MessagePacket;
64import eu.siacs.conversations.xmpp.stanzas.PresencePacket;
65import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket;
66import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket;
67import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket;
68import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket;
69import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket;
70import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket;
71
72public class XmppConnection implements Runnable {
73
74 private static final int PACKET_IQ = 0;
75 private static final int PACKET_MESSAGE = 1;
76 private static final int PACKET_PRESENCE = 2;
77 private final Context applicationContext;
78 protected Account account;
79 private WakeLock wakeLock;
80 private Socket socket;
81 private XmlReader tagReader;
82 private TagWriter tagWriter;
83 private Features features = new Features(this);
84 private boolean shouldBind = true;
85 private boolean shouldAuthenticate = true;
86 private Element streamFeatures;
87 private HashMap<String, List<String>> disco = new HashMap<>();
88
89 private String streamId = null;
90 private int smVersion = 3;
91 private SparseArray<String> messageReceipts = new SparseArray<>();
92
93 private boolean usingCompression = false;
94 private boolean usingEncryption = false;
95 private int stanzasReceived = 0;
96 private int stanzasSent = 0;
97 private long lastPaketReceived = 0;
98 private long lastPingSent = 0;
99 private long lastConnect = 0;
100 private long lastSessionStarted = 0;
101 private int attempt = 0;
102 private Hashtable<String, PacketReceived> 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 OnMessageAcknowledged acknowledgedListener = null;
110 private XmppConnectionService mXmppConnectionService = null;
111
112 private SaslMechanism saslMechanism;
113
114 public XmppConnection(Account account, XmppConnectionService service) {
115 this.account = account;
116 this.wakeLock = service.getPowerManager().newWakeLock(
117 PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString());
118 tagWriter = new TagWriter();
119 mXmppConnectionService = service;
120 applicationContext = service.getApplicationContext();
121 }
122
123 protected void changeStatus(int nextStatus) {
124 if (account.getStatus() != nextStatus) {
125 if ((nextStatus == Account.STATUS_OFFLINE)
126 && (account.getStatus() != Account.STATUS_CONNECTING)
127 && (account.getStatus() != Account.STATUS_ONLINE)
128 && (account.getStatus() != Account.STATUS_DISABLED)) {
129 return;
130 }
131 if (nextStatus == Account.STATUS_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 usingCompression = false;
144 usingEncryption = false;
145 lastConnect = SystemClock.elapsedRealtime();
146 lastPingSent = SystemClock.elapsedRealtime();
147 this.attempt++;
148 try {
149 shouldAuthenticate = shouldBind = !account
150 .isOptionSet(Account.OPTION_REGISTER);
151 tagReader = new XmlReader(wakeLock);
152 tagWriter = new TagWriter();
153 packetCallbacks.clear();
154 this.changeStatus(Account.STATUS_CONNECTING);
155 Bundle result = DNSHelper.getSRVRecord(account.getServer());
156 ArrayList<Parcelable> values = result.getParcelableArrayList("values");
157 if ("timeout".equals(result.getString("error"))) {
158 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": dns timeout");
159 this.changeStatus(Account.STATUS_OFFLINE);
160 return;
161 } else if (values != null) {
162 int i = 0;
163 boolean socketError = true;
164 while (socketError && values.size() > i) {
165 Bundle namePort = (Bundle) values.get(i);
166 try {
167 String srvRecordServer;
168 try {
169 srvRecordServer=IDN.toASCII(namePort.getString("name"));
170 } catch (final IllegalArgumentException e) {
171 // TODO: Handle me?`
172 srvRecordServer = "";
173 }
174 int srvRecordPort = namePort.getInt("port");
175 String srvIpServer = namePort.getString("ipv4");
176 InetSocketAddress addr;
177 if (srvIpServer != null) {
178 addr = new InetSocketAddress(srvIpServer, srvRecordPort);
179 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
180 + ": using values from dns " + srvRecordServer
181 + "[" + srvIpServer + "]:" + srvRecordPort);
182 } else {
183 addr = new InetSocketAddress(srvRecordServer, srvRecordPort);
184 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
185 + ": using values from dns "
186 + srvRecordServer + ":" + srvRecordPort);
187 }
188 socket = new Socket();
189 socket.connect(addr, 20000);
190 socketError = false;
191 } catch (UnknownHostException e) {
192 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
193 i++;
194 } catch (IOException e) {
195 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
196 i++;
197 }
198 }
199 if (socketError) {
200 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
201 if (wakeLock.isHeld()) {
202 try {
203 wakeLock.release();
204 } catch (final RuntimeException ignored) {
205 }
206 }
207 return;
208 }
209 } else if (result.containsKey("error")
210 && "nosrv".equals(result.getString("error", null))) {
211 socket = new Socket(account.getServer().getDomainpart(), 5222);
212 } else {
213 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
214 + ": timeout in DNS resolution");
215 changeStatus(Account.STATUS_OFFLINE);
216 return;
217 }
218 OutputStream out = socket.getOutputStream();
219 tagWriter.setOutputStream(out);
220 InputStream in = socket.getInputStream();
221 tagReader.setInputStream(in);
222 tagWriter.beginDocument();
223 sendStartStream();
224 Tag nextTag;
225 while ((nextTag = tagReader.readTag()) != null) {
226 if (nextTag.isStart("stream")) {
227 processStream(nextTag);
228 break;
229 } else {
230 Log.d(Config.LOGTAG,
231 "found unexpected tag: " + nextTag.getName());
232 return;
233 }
234 }
235 if (socket.isConnected()) {
236 socket.close();
237 }
238 } catch (UnknownHostException e) {
239 this.changeStatus(Account.STATUS_SERVER_NOT_FOUND);
240 if (wakeLock.isHeld()) {
241 try {
242 wakeLock.release();
243 } catch (final RuntimeException ignored) {
244 }
245 }
246 } catch (final IOException | XmlPullParserException e) {
247 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
248 this.changeStatus(Account.STATUS_OFFLINE);
249 if (wakeLock.isHeld()) {
250 try {
251 wakeLock.release();
252 } catch (final RuntimeException ignored) {
253 }
254 }
255 } catch (NoSuchAlgorithmException e) {
256 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage());
257 this.changeStatus(Account.STATUS_OFFLINE);
258 Log.d(Config.LOGTAG, "compression exception " + e.getMessage());
259 if (wakeLock.isHeld()) {
260 try {
261 wakeLock.release();
262 } catch (final RuntimeException ignored) {
263 }
264 }
265 }
266
267 }
268
269 @Override
270 public void run() {
271 connect();
272 }
273
274 private void processStream(final Tag currentTag) throws XmlPullParserException,
275 IOException, NoSuchAlgorithmException {
276 Tag nextTag = tagReader.readTag();
277
278 while ((nextTag != null) && (!nextTag.isEnd("stream"))) {
279 if (nextTag.isStart("error")) {
280 processStreamError(nextTag);
281 } else if (nextTag.isStart("features")) {
282 processStreamFeatures(nextTag);
283 } else if (nextTag.isStart("proceed")) {
284 switchOverToTls(nextTag);
285 } else if (nextTag.isStart("compressed")) {
286 switchOverToZLib(nextTag);
287 } else if (nextTag.isStart("success")) {
288 final String challenge = tagReader.readElement(nextTag).getContent();
289 try {
290 saslMechanism.getResponse(challenge);
291 } catch (final SaslMechanism.AuthenticationException e) {
292 disconnect(true);
293 Log.e(Config.LOGTAG, String.valueOf(e));
294 }
295 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in");
296 account.setKey(Account.PINNED_MECHANISM_KEY,
297 String.valueOf(saslMechanism.getPriority()));
298 tagReader.reset();
299 sendStartStream();
300 processStream(tagReader.readTag());
301 break;
302 } else if (nextTag.isStart("failure")) {
303 tagReader.readElement(nextTag);
304 changeStatus(Account.STATUS_UNAUTHORIZED);
305 } else if (nextTag.isStart("challenge")) {
306 final String challenge = tagReader.readElement(nextTag).getContent();
307 final Element response = new Element("response");
308 response.setAttribute("xmlns",
309 "urn:ietf:params:xml:ns:xmpp-sasl");
310 try {
311 response.setContent(saslMechanism.getResponse(challenge));
312 } catch (final SaslMechanism.AuthenticationException e) {
313 // TODO: Send auth abort tag.
314 Log.e(Config.LOGTAG, e.toString());
315 }
316 tagWriter.writeElement(response);
317 } else if (nextTag.isStart("enabled")) {
318 Element enabled = tagReader.readElement(nextTag);
319 if ("true".equals(enabled.getAttribute("resume"))) {
320 this.streamId = enabled.getAttribute("id");
321 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
322 + ": stream managment(" + smVersion
323 + ") enabled (resumable)");
324 } else {
325 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
326 + ": stream managment(" + smVersion + ") enabled");
327 }
328 this.lastSessionStarted = SystemClock.elapsedRealtime();
329 this.stanzasReceived = 0;
330 RequestPacket r = new RequestPacket(smVersion);
331 tagWriter.writeStanzaAsync(r);
332 } else if (nextTag.isStart("resumed")) {
333 lastPaketReceived = SystemClock.elapsedRealtime();
334 Element resumed = tagReader.readElement(nextTag);
335 String h = resumed.getAttribute("h");
336 try {
337 int serverCount = Integer.parseInt(h);
338 if (serverCount != stanzasSent) {
339 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
340 + ": session resumed with lost packages");
341 stanzasSent = serverCount;
342 } else {
343 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
344 + ": session resumed");
345 }
346 if (acknowledgedListener != null) {
347 for (int i = 0; i < messageReceipts.size(); ++i) {
348 if (serverCount >= messageReceipts.keyAt(i)) {
349 acknowledgedListener.onMessageAcknowledged(
350 account, messageReceipts.valueAt(i));
351 }
352 }
353 }
354 messageReceipts.clear();
355 } catch (final NumberFormatException ignored) {
356
357 }
358 sendInitialPing();
359
360 } else if (nextTag.isStart("r")) {
361 tagReader.readElement(nextTag);
362 AckPacket ack = new AckPacket(this.stanzasReceived, smVersion);
363 tagWriter.writeStanzaAsync(ack);
364 } else if (nextTag.isStart("a")) {
365 Element ack = tagReader.readElement(nextTag);
366 lastPaketReceived = SystemClock.elapsedRealtime();
367 int serverSequence = Integer.parseInt(ack.getAttribute("h"));
368 String msgId = this.messageReceipts.get(serverSequence);
369 if (msgId != null) {
370 if (this.acknowledgedListener != null) {
371 this.acknowledgedListener.onMessageAcknowledged(
372 account, msgId);
373 }
374 this.messageReceipts.remove(serverSequence);
375 }
376 } else if (nextTag.isStart("failed")) {
377 tagReader.readElement(nextTag);
378 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed");
379 streamId = null;
380 if (account.getStatus() != Account.STATUS_ONLINE) {
381 sendBindRequest();
382 }
383 } else if (nextTag.isStart("iq")) {
384 processIq(nextTag);
385 } else if (nextTag.isStart("message")) {
386 processMessage(nextTag);
387 } else if (nextTag.isStart("presence")) {
388 processPresence(nextTag);
389 }
390 nextTag = tagReader.readTag();
391 }
392 if (account.getStatus() == Account.STATUS_ONLINE) {
393 account. setStatus(Account.STATUS_OFFLINE);
394 if (statusListener != null) {
395 statusListener.onStatusChanged(account);
396 }
397 }
398 }
399
400 private void sendInitialPing() {
401 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping");
402 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
403 iq.setFrom(account.getJid());
404 iq.addChild("ping", "urn:xmpp:ping");
405 this.sendIqPacket(iq, new OnIqPacketReceived() {
406
407 @Override
408 public void onIqPacketReceived(Account account, IqPacket packet) {
409 Log.d(Config.LOGTAG, account.getJid().toBareJid().toString()
410 + ": online with resource " + account.getResource());
411 changeStatus(Account.STATUS_ONLINE);
412 }
413 });
414 }
415
416 private Element processPacket(Tag currentTag, int packetType)
417 throws XmlPullParserException, IOException {
418 Element element;
419 switch (packetType) {
420 case PACKET_IQ:
421 element = new IqPacket();
422 break;
423 case PACKET_MESSAGE:
424 element = new MessagePacket();
425 break;
426 case PACKET_PRESENCE:
427 element = new PresencePacket();
428 break;
429 default:
430 return null;
431 }
432 element.setAttributes(currentTag.getAttributes());
433 Tag nextTag = tagReader.readTag();
434 if (nextTag == null) {
435 throw new IOException("interrupted mid tag");
436 }
437 while (!nextTag.isEnd(element.getName())) {
438 if (!nextTag.isNo()) {
439 Element child = tagReader.readElement(nextTag);
440 String type = currentTag.getAttribute("type");
441 if (packetType == PACKET_IQ
442 && "jingle".equals(child.getName())
443 && ("set".equalsIgnoreCase(type) || "get"
444 .equalsIgnoreCase(type))) {
445 element = new JinglePacket();
446 element.setAttributes(currentTag.getAttributes());
447 }
448 element.addChild(child);
449 }
450 nextTag = tagReader.readTag();
451 if (nextTag == null) {
452 throw new IOException("interrupted mid tag");
453 }
454 }
455 ++stanzasReceived;
456 lastPaketReceived = SystemClock.elapsedRealtime();
457 return element;
458 }
459
460 private void processIq(Tag currentTag) throws XmlPullParserException,
461 IOException {
462 IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ);
463
464 if (packet.getId() == null) {
465 return; // an iq packet without id is definitely invalid
466 }
467
468 if (packet instanceof JinglePacket) {
469 if (this.jingleListener != null) {
470 this.jingleListener.onJinglePacketReceived(account,
471 (JinglePacket) packet);
472 }
473 } else {
474 if (packetCallbacks.containsKey(packet.getId())) {
475 if (packetCallbacks.get(packet.getId()) instanceof OnIqPacketReceived) {
476 ((OnIqPacketReceived) packetCallbacks.get(packet.getId()))
477 .onIqPacketReceived(account, packet);
478 }
479
480 packetCallbacks.remove(packet.getId());
481 } else if ((packet.getType() == IqPacket.TYPE_GET || packet
482 .getType() == IqPacket.TYPE_SET)
483 && this.unregisteredIqListener != null) {
484 this.unregisteredIqListener.onIqPacketReceived(account, packet);
485 }
486 }
487 }
488
489 private void processMessage(Tag currentTag) throws XmlPullParserException,
490 IOException {
491 MessagePacket packet = (MessagePacket) processPacket(currentTag,
492 PACKET_MESSAGE);
493 String id = packet.getAttribute("id");
494 if ((id != null) && (packetCallbacks.containsKey(id))) {
495 if (packetCallbacks.get(id) instanceof OnMessagePacketReceived) {
496 ((OnMessagePacketReceived) packetCallbacks.get(id))
497 .onMessagePacketReceived(account, packet);
498 }
499 packetCallbacks.remove(id);
500 } else if (this.messageListener != null) {
501 this.messageListener.onMessagePacketReceived(account, packet);
502 }
503 }
504
505 private void processPresence(Tag currentTag) throws XmlPullParserException,
506 IOException {
507 PresencePacket packet = (PresencePacket) processPacket(currentTag,
508 PACKET_PRESENCE);
509 String id = packet.getAttribute("id");
510 if ((id != null) && (packetCallbacks.containsKey(id))) {
511 if (packetCallbacks.get(id) instanceof OnPresencePacketReceived) {
512 ((OnPresencePacketReceived) packetCallbacks.get(id))
513 .onPresencePacketReceived(account, packet);
514 }
515 packetCallbacks.remove(id);
516 } else if (this.presenceListener != null) {
517 this.presenceListener.onPresencePacketReceived(account, packet);
518 }
519 }
520
521 private void sendCompressionZlib() throws IOException {
522 Element compress = new Element("compress");
523 compress.setAttribute("xmlns", "http://jabber.org/protocol/compress");
524 compress.addChild("method").setContent("zlib");
525 tagWriter.writeElement(compress);
526 }
527
528 private void switchOverToZLib(final Tag currentTag)
529 throws XmlPullParserException, IOException,
530 NoSuchAlgorithmException {
531 tagReader.readTag(); // read tag close
532 tagWriter.setOutputStream(new ZLibOutputStream(tagWriter
533 .getOutputStream()));
534 tagReader
535 .setInputStream(new ZLibInputStream(tagReader.getInputStream()));
536
537 sendStartStream();
538 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": compression enabled");
539 usingCompression = true;
540 processStream(tagReader.readTag());
541 }
542
543 private void sendStartTLS() throws IOException {
544 Tag startTLS = Tag.empty("starttls");
545 startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls");
546 tagWriter.writeTag(startTLS);
547 }
548
549 private SharedPreferences getPreferences() {
550 return PreferenceManager
551 .getDefaultSharedPreferences(applicationContext);
552 }
553
554 private boolean enableLegacySSL() {
555 return getPreferences().getBoolean("enable_legacy_ssl", false);
556 }
557
558 private void switchOverToTls(final Tag currentTag) throws XmlPullParserException,
559 IOException {
560 tagReader.readTag();
561 try {
562 SSLContext sc = SSLContext.getInstance("TLS");
563 sc.init(null,
564 new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},
565 mXmppConnectionService.getRNG());
566 SSLSocketFactory factory = sc.getSocketFactory();
567
568 if (factory == null) {
569 throw new IOException("SSLSocketFactory was null");
570 }
571
572 final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier());
573
574 if (socket == null) {
575 throw new IOException("socket was null");
576 }
577 final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,
578 socket.getInetAddress().getHostAddress(), socket.getPort(),
579 true);
580
581 // Support all protocols except legacy SSL.
582 // The min SDK version prevents us having to worry about SSLv2. In
583 // future, this may be true of SSLv3 as well.
584 final String[] supportProtocols;
585 if (enableLegacySSL()) {
586 supportProtocols = sslSocket.getSupportedProtocols();
587 } else {
588 final List<String> supportedProtocols = new LinkedList<>(
589 Arrays.asList(sslSocket.getSupportedProtocols()));
590 supportedProtocols.remove("SSLv3");
591 supportProtocols = new String[supportedProtocols.size()];
592 supportedProtocols.toArray(supportProtocols);
593 }
594 sslSocket.setEnabledProtocols(supportProtocols);
595
596 if (verifier != null
597 && !verifier.verify(account.getServer().getDomainpart(),
598 sslSocket.getSession())) {
599 sslSocket.close();
600 throw new IOException("host mismatch in TLS connection");
601 }
602 tagReader.setInputStream(sslSocket.getInputStream());
603 tagWriter.setOutputStream(sslSocket.getOutputStream());
604 sendStartStream();
605 Log.d(Config.LOGTAG, account.getJid().toBareJid()
606 + ": TLS connection established");
607 usingEncryption = true;
608 processStream(tagReader.readTag());
609 sslSocket.close();
610 } catch (final NoSuchAlgorithmException | KeyManagementException e1) {
611 e1.printStackTrace();
612 }
613 }
614
615 private void processStreamFeatures(Tag currentTag)
616 throws XmlPullParserException, IOException {
617 this.streamFeatures = tagReader.readElement(currentTag);
618 if (this.streamFeatures.hasChild("starttls") && !usingEncryption) {
619 sendStartTLS();
620 } else if (compressionAvailable()) {
621 sendCompressionZlib();
622 } else if (this.streamFeatures.hasChild("register")
623 && account.isOptionSet(Account.OPTION_REGISTER)
624 && usingEncryption) {
625 sendRegistryRequest();
626 } else if (!this.streamFeatures.hasChild("register")
627 && account.isOptionSet(Account.OPTION_REGISTER)) {
628 changeStatus(Account.STATUS_REGISTRATION_NOT_SUPPORTED);
629 disconnect(true);
630 } else if (this.streamFeatures.hasChild("mechanisms")
631 && shouldAuthenticate && usingEncryption) {
632 final List<String> mechanisms = extractMechanisms(streamFeatures
633 .findChild("mechanisms"));
634 final Element auth = new Element("auth");
635 auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl");
636 if (mechanisms.contains("SCRAM-SHA-1")) {
637 saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG());
638 } else if (mechanisms.contains("DIGEST-MD5")) {
639 saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG());
640 } else if (mechanisms.contains("PLAIN")) {
641 saslMechanism = new Plain(tagWriter, account);
642 }
643 final JSONObject keys = account.getKeys();
644 try {
645 if (keys.has(Account.PINNED_MECHANISM_KEY) &&
646 keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority() ) {
647 Log.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() +
648 " has lower priority (" + String.valueOf(saslMechanism.getPriority()) +
649 ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) +
650 "). Possible downgrade attack?");
651 disconnect(true);
652 }
653 } catch (final JSONException e) {
654 Log.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism");
655 }
656 Log.d(Config.LOGTAG, "Authenticating with " + saslMechanism.getMechanism());
657 auth.setAttribute("mechanism", saslMechanism.getMechanism());
658 if (!saslMechanism.getClientFirstMessage().isEmpty()) {
659 auth.setContent(saslMechanism.getClientFirstMessage());
660 }
661 tagWriter.writeElement(auth);
662 } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:"
663 + smVersion)
664 && streamId != null) {
665 ResumePacket resume = new ResumePacket(this.streamId,
666 stanzasReceived, smVersion);
667 this.tagWriter.writeStanzaAsync(resume);
668 } else if (this.streamFeatures.hasChild("bind") && shouldBind) {
669 sendBindRequest();
670 } else {
671 Log.d(Config.LOGTAG, account.getJid().toBareJid()
672 + ": incompatible server. disconnecting");
673 disconnect(true);
674 }
675 }
676
677 private boolean compressionAvailable() {
678 if (!this.streamFeatures.hasChild("compression",
679 "http://jabber.org/features/compress"))
680 return false;
681 if (!ZLibOutputStream.SUPPORTED)
682 return false;
683 if (!account.isOptionSet(Account.OPTION_USECOMPRESSION))
684 return false;
685
686 Element compression = this.streamFeatures.findChild("compression",
687 "http://jabber.org/features/compress");
688 for (Element child : compression.getChildren()) {
689 if (!"method".equals(child.getName()))
690 continue;
691
692 if ("zlib".equalsIgnoreCase(child.getContent())) {
693 return true;
694 }
695 }
696 return false;
697 }
698
699 private List<String> extractMechanisms(Element stream) {
700 ArrayList<String> mechanisms = new ArrayList<>(stream
701 .getChildren().size());
702 for (Element child : stream.getChildren()) {
703 mechanisms.add(child.getContent());
704 }
705 return mechanisms;
706 }
707
708 private void sendRegistryRequest() {
709 IqPacket register = new IqPacket(IqPacket.TYPE_GET);
710 register.query("jabber:iq:register");
711 register.setTo(account.getServer());
712 sendIqPacket(register, new OnIqPacketReceived() {
713
714 @Override
715 public void onIqPacketReceived(Account account, IqPacket packet) {
716 Element instructions = packet.query().findChild("instructions");
717 if (packet.query().hasChild("username")
718 && (packet.query().hasChild("password"))) {
719 IqPacket register = new IqPacket(IqPacket.TYPE_SET);
720 Element username = new Element("username")
721 .setContent(account.getUsername());
722 Element password = new Element("password")
723 .setContent(account.getPassword());
724 register.query("jabber:iq:register").addChild(username);
725 register.query().addChild(password);
726 sendIqPacket(register, new OnIqPacketReceived() {
727
728 @Override
729 public void onIqPacketReceived(Account account,
730 IqPacket packet) {
731 if (packet.getType() == IqPacket.TYPE_RESULT) {
732 account.setOption(Account.OPTION_REGISTER,
733 false);
734 changeStatus(Account.STATUS_REGISTRATION_SUCCESSFULL);
735 } else if (packet.hasChild("error")
736 && (packet.findChild("error")
737 .hasChild("conflict"))) {
738 changeStatus(Account.STATUS_REGISTRATION_CONFLICT);
739 } else {
740 changeStatus(Account.STATUS_REGISTRATION_FAILED);
741 Log.d(Config.LOGTAG, packet.toString());
742 }
743 disconnect(true);
744 }
745 });
746 } else {
747 changeStatus(Account.STATUS_REGISTRATION_FAILED);
748 disconnect(true);
749 Log.d(Config.LOGTAG, account.getJid().toBareJid()
750 + ": could not register. instructions are"
751 + instructions.getContent());
752 }
753 }
754 });
755 }
756
757 private void sendBindRequest() throws IOException {
758 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
759 iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind")
760 .addChild("resource").setContent(account.getResource());
761 this.sendUnboundIqPacket(iq, new OnIqPacketReceived() {
762 @Override
763 public void onIqPacketReceived(Account account, IqPacket packet) {
764 Element bind = packet.findChild("bind");
765 if (bind != null) {
766 final Element jid = bind.findChild("jid");
767 if (jid != null && jid.getContent() != null) {
768 try {
769 account.setResource(Jid.fromString(jid.getContent()).getResourcepart());
770 } catch (final InvalidJidException e) {
771 // TODO: Handle the case where an external JID is technically invalid?
772 }
773 if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) {
774 smVersion = 3;
775 EnablePacket enable = new EnablePacket(smVersion);
776 tagWriter.writeStanzaAsync(enable);
777 stanzasSent = 0;
778 messageReceipts.clear();
779 } else if (streamFeatures.hasChild("sm",
780 "urn:xmpp:sm:2")) {
781 smVersion = 2;
782 EnablePacket enable = new EnablePacket(smVersion);
783 tagWriter.writeStanzaAsync(enable);
784 stanzasSent = 0;
785 messageReceipts.clear();
786 }
787 sendServiceDiscoveryInfo(account.getServer());
788 sendServiceDiscoveryItems(account.getServer());
789 if (bindListener != null) {
790 bindListener.onBind(account);
791 }
792 sendInitialPing();
793 } else {
794 disconnect(true);
795 }
796 } else {
797 disconnect(true);
798 }
799 }
800 });
801 if (this.streamFeatures.hasChild("session")) {
802 Log.d(Config.LOGTAG, account.getJid().toBareJid()
803 + ": sending deprecated session");
804 IqPacket startSession = new IqPacket(IqPacket.TYPE_SET);
805 startSession.addChild("session",
806 "urn:ietf:params:xml:ns:xmpp-session");
807 this.sendUnboundIqPacket(startSession, null);
808 }
809 }
810
811 private void sendServiceDiscoveryInfo(final Jid server) {
812 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
813 iq.setTo(server.toDomainJid());
814 iq.query("http://jabber.org/protocol/disco#info");
815 this.sendIqPacket(iq, new OnIqPacketReceived() {
816
817 @Override
818 public void onIqPacketReceived(Account account, IqPacket packet) {
819 final List<Element> elements = packet.query().getChildren();
820 final List<String> features = new ArrayList<>();
821 for (Element element : elements) {
822 if (element.getName().equals("feature")) {
823 features.add(element.getAttribute("var"));
824 }
825 }
826 disco.put(server.toDomainJid().toString(), features);
827
828 if (account.getServer().equals(server.toDomainJid())) {
829 enableAdvancedStreamFeatures();
830 }
831 }
832 });
833 }
834
835 private void enableAdvancedStreamFeatures() {
836 if (getFeatures().carbons()) {
837 sendEnableCarbons();
838 }
839 }
840
841 private void sendServiceDiscoveryItems(final Jid server) {
842 final IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
843 iq.setTo(server.toDomainJid());
844 iq.query("http://jabber.org/protocol/disco#items");
845 this.sendIqPacket(iq, new OnIqPacketReceived() {
846
847 @Override
848 public void onIqPacketReceived(Account account, IqPacket packet) {
849 List<Element> elements = packet.query().getChildren();
850 for (Element element : elements) {
851 if (element.getName().equals("item")) {
852 final String jid = element.getAttribute("jid");
853 try {
854 sendServiceDiscoveryInfo(Jid.fromString(jid).toDomainJid());
855 } catch (final InvalidJidException ignored) {
856 // TODO: Handle the case where an external JID is technically invalid?
857 }
858 }
859 }
860 }
861 });
862 }
863
864 private void sendEnableCarbons() {
865 IqPacket iq = new IqPacket(IqPacket.TYPE_SET);
866 iq.addChild("enable", "urn:xmpp:carbons:2");
867 this.sendIqPacket(iq, new OnIqPacketReceived() {
868
869 @Override
870 public void onIqPacketReceived(Account account, IqPacket packet) {
871 if (!packet.hasChild("error")) {
872 Log.d(Config.LOGTAG, account.getJid().toBareJid()
873 + ": successfully enabled carbons");
874 } else {
875 Log.d(Config.LOGTAG, account.getJid().toBareJid()
876 + ": error enableing carbons " + packet.toString());
877 }
878 }
879 });
880 }
881
882 private void processStreamError(Tag currentTag)
883 throws XmlPullParserException, IOException {
884 Element streamError = tagReader.readElement(currentTag);
885 if (streamError != null && streamError.hasChild("conflict")) {
886 final String resource = account.getResource().split("\\.")[0];
887 account.setResource(resource + "." + nextRandomId());
888 Log.d(Config.LOGTAG,
889 account.getJid().toBareJid() + ": switching resource due to conflict ("
890 + account.getResource() + ")");
891 }
892 }
893
894 private void sendStartStream() throws IOException {
895 Tag stream = Tag.start("stream:stream");
896 stream.setAttribute("from", account.getJid().toBareJid().toString());
897 stream.setAttribute("to", account.getServer().toString());
898 stream.setAttribute("version", "1.0");
899 stream.setAttribute("xml:lang", "en");
900 stream.setAttribute("xmlns", "jabber:client");
901 stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams");
902 tagWriter.writeTag(stream);
903 }
904
905 private String nextRandomId() {
906 return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32);
907 }
908
909 public void sendIqPacket(IqPacket packet, OnIqPacketReceived callback) {
910 if (packet.getId() == null) {
911 String id = nextRandomId();
912 packet.setAttribute("id", id);
913 }
914 packet.setFrom(account.getJid());
915 this.sendPacket(packet, callback);
916 }
917
918 public void sendUnboundIqPacket(IqPacket packet, OnIqPacketReceived callback) {
919 if (packet.getId() == null) {
920 String id = nextRandomId();
921 packet.setAttribute("id", id);
922 }
923 this.sendPacket(packet, callback);
924 }
925
926 public void sendMessagePacket(MessagePacket packet) {
927 this.sendPacket(packet, null);
928 }
929
930 public void sendPresencePacket(PresencePacket packet) {
931 this.sendPacket(packet, null);
932 }
933
934 private synchronized void sendPacket(final AbstractStanza packet,
935 PacketReceived callback) {
936 if (packet.getName().equals("iq") || packet.getName().equals("message")
937 || packet.getName().equals("presence")) {
938 ++stanzasSent;
939 }
940 tagWriter.writeStanzaAsync(packet);
941 if (packet instanceof MessagePacket && packet.getId() != null
942 && this.streamId != null) {
943 Log.d(Config.LOGTAG, "request delivery report for stanza "
944 + stanzasSent);
945 this.messageReceipts.put(stanzasSent, packet.getId());
946 tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion));
947 }
948 if (callback != null) {
949 if (packet.getId() == null) {
950 packet.setId(nextRandomId());
951 }
952 packetCallbacks.put(packet.getId(), callback);
953 }
954 }
955
956 public void sendPing() {
957 if (streamFeatures.hasChild("sm")) {
958 tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
959 } else {
960 IqPacket iq = new IqPacket(IqPacket.TYPE_GET);
961 iq.setFrom(account.getJid());
962 iq.addChild("ping", "urn:xmpp:ping");
963 this.sendIqPacket(iq, null);
964 }
965 this.lastPingSent = SystemClock.elapsedRealtime();
966 }
967
968 public void setOnMessagePacketReceivedListener(
969 OnMessagePacketReceived listener) {
970 this.messageListener = listener;
971 }
972
973 public void setOnUnregisteredIqPacketReceivedListener(
974 OnIqPacketReceived listener) {
975 this.unregisteredIqListener = listener;
976 }
977
978 public void setOnPresencePacketReceivedListener(
979 OnPresencePacketReceived listener) {
980 this.presenceListener = listener;
981 }
982
983 public void setOnJinglePacketReceivedListener(
984 OnJinglePacketReceived listener) {
985 this.jingleListener = listener;
986 }
987
988 public void setOnStatusChangedListener(OnStatusChanged listener) {
989 this.statusListener = listener;
990 }
991
992 public void setOnBindListener(OnBindListener listener) {
993 this.bindListener = listener;
994 }
995
996 public void setOnMessageAcknowledgeListener(OnMessageAcknowledged listener) {
997 this.acknowledgedListener = listener;
998 }
999
1000 public void disconnect(boolean force) {
1001 Log.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting");
1002 try {
1003 if (force) {
1004 socket.close();
1005 return;
1006 }
1007 new Thread(new Runnable() {
1008
1009 @Override
1010 public void run() {
1011 if (tagWriter.isActive()) {
1012 tagWriter.finish();
1013 try {
1014 while (!tagWriter.finished()) {
1015 Log.d(Config.LOGTAG, "not yet finished");
1016 Thread.sleep(100);
1017 }
1018 tagWriter.writeTag(Tag.end("stream:stream"));
1019 socket.close();
1020 } catch (IOException e) {
1021 Log.d(Config.LOGTAG,
1022 "io exception during disconnect");
1023 } catch (InterruptedException e) {
1024 Log.d(Config.LOGTAG, "interrupted");
1025 }
1026 }
1027 }
1028 }).start();
1029 } catch (IOException e) {
1030 Log.d(Config.LOGTAG, "io exception during disconnect");
1031 }
1032 }
1033
1034 public List<String> findDiscoItemsByFeature(String feature) {
1035 final List<String> items = new ArrayList<>();
1036 for (Entry<String, List<String>> cursor : disco.entrySet()) {
1037 if (cursor.getValue().contains(feature)) {
1038 items.add(cursor.getKey());
1039 }
1040 }
1041 return items;
1042 }
1043
1044 public String findDiscoItemByFeature(String feature) {
1045 List<String> items = findDiscoItemsByFeature(feature);
1046 if (items.size() >= 1) {
1047 return items.get(0);
1048 }
1049 return null;
1050 }
1051
1052 public void r() {
1053 this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion));
1054 }
1055
1056 public String getMucServer() {
1057 return findDiscoItemByFeature("http://jabber.org/protocol/muc");
1058 }
1059
1060 public int getTimeToNextAttempt() {
1061 int interval = (int) (25 * Math.pow(1.5, attempt));
1062 int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000);
1063 return interval - secondsSinceLast;
1064 }
1065
1066 public int getAttempt() {
1067 return this.attempt;
1068 }
1069
1070 public Features getFeatures() {
1071 return this.features;
1072 }
1073
1074 public long getLastSessionEstablished() {
1075 long diff;
1076 if (this.lastSessionStarted == 0) {
1077 diff = SystemClock.elapsedRealtime() - this.lastConnect;
1078 } else {
1079 diff = SystemClock.elapsedRealtime() - this.lastSessionStarted;
1080 }
1081 return System.currentTimeMillis() - diff;
1082 }
1083
1084 public long getLastConnect() {
1085 return this.lastConnect;
1086 }
1087
1088 public long getLastPingSent() {
1089 return this.lastPingSent;
1090 }
1091
1092 public long getLastPacketReceived() {
1093 return this.lastPaketReceived;
1094 }
1095
1096 public void sendActive() {
1097 this.sendPacket(new ActivePacket(), null);
1098 }
1099
1100 public void sendInactive() {
1101 this.sendPacket(new InactivePacket(), null);
1102 }
1103
1104 public class Features {
1105 XmppConnection connection;
1106
1107 public Features(XmppConnection connection) {
1108 this.connection = connection;
1109 }
1110
1111 private boolean hasDiscoFeature(final Jid server, final String feature) {
1112 return connection.disco.containsKey(server.toDomainJid().toString()) &&
1113 connection.disco.get(server.toDomainJid().toString()).contains(feature);
1114 }
1115
1116 public boolean carbons() {
1117 return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2");
1118 }
1119
1120 public boolean sm() {
1121 return streamId != null;
1122 }
1123
1124 public boolean csi() {
1125 return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0");
1126 }
1127
1128 public boolean pubsub() {
1129 return hasDiscoFeature(account.getServer(),
1130 "http://jabber.org/protocol/pubsub#publish");
1131 }
1132
1133 public boolean mam() {
1134 return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0");
1135 }
1136
1137 public boolean rosterVersioning() {
1138 return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver");
1139 }
1140
1141 public boolean streamhost() {
1142 return connection
1143 .findDiscoItemByFeature("http://jabber.org/protocol/bytestreams") != null;
1144 }
1145
1146 public boolean compression() {
1147 return connection.usingCompression;
1148 }
1149 }
1150}