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