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