nmode's Git Repositories - signal-cli/blob - src/main/java/org/asamk/signal/Manager.java

   1 /**
   2  * Copyright (C) 2015 AsamK
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.asamk.signal;
  18
  19 import com.fasterxml.jackson.annotation.JsonAutoDetect;
  20 import com.fasterxml.jackson.annotation.PropertyAccessor;
  21 import com.fasterxml.jackson.databind.DeserializationFeature;
  22 import com.fasterxml.jackson.databind.JsonNode;
  23 import com.fasterxml.jackson.databind.ObjectMapper;
  24 import com.fasterxml.jackson.databind.SerializationFeature;
  25 import com.fasterxml.jackson.databind.node.ObjectNode;
  26 import org.apache.http.util.TextUtils;
  27 import org.asamk.Signal;
  28 import org.whispersystems.libsignal.*;
  29 import org.whispersystems.libsignal.ecc.Curve;
  30 import org.whispersystems.libsignal.ecc.ECKeyPair;
  31 import org.whispersystems.libsignal.ecc.ECPublicKey;
  32 import org.whispersystems.libsignal.state.PreKeyRecord;
  33 import org.whispersystems.libsignal.state.SignalProtocolStore;
  34 import org.whispersystems.libsignal.state.SignedPreKeyRecord;
  35 import org.whispersystems.libsignal.util.KeyHelper;
  36 import org.whispersystems.libsignal.util.Medium;
  37 import org.whispersystems.libsignal.util.guava.Optional;
  38 import org.whispersystems.signalservice.api.SignalServiceAccountManager;
  39 import org.whispersystems.signalservice.api.SignalServiceMessagePipe;
  40 import org.whispersystems.signalservice.api.SignalServiceMessageReceiver;
  41 import org.whispersystems.signalservice.api.SignalServiceMessageSender;
  42 import org.whispersystems.signalservice.api.crypto.*;
  43 import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
  44 import org.whispersystems.signalservice.api.messages.*;
  45 import org.whispersystems.signalservice.api.messages.multidevice.RequestMessage;
  46 import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
  47 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
  48 import org.whispersystems.signalservice.api.push.TrustStore;
  49 import org.whispersystems.signalservice.api.push.exceptions.AuthorizationFailedException;
  50 import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
  51 import org.whispersystems.signalservice.api.util.InvalidNumberException;
  52 import org.whispersystems.signalservice.api.util.PhoneNumberFormatter;
  53 import org.whispersystems.signalservice.internal.push.SignalServiceProtos;
  54
  55 import java.io.*;
  56 import java.net.URI;
  57 import java.net.URISyntaxException;
  58 import java.net.URLDecoder;
  59 import java.net.URLEncoder;
  60 import java.nio.file.Files;
  61 import java.nio.file.Paths;
  62 import java.util.*;
  63 import java.util.concurrent.TimeUnit;
  64 import java.util.concurrent.TimeoutException;
  65
  66 class Manager implements Signal {
  67     private final static String URL = "https://textsecure-service.whispersystems.org";
  68     private final static TrustStore TRUST_STORE = new WhisperTrustStore();
  69
  70     public final static String PROJECT_NAME = Manager.class.getPackage().getImplementationTitle();
  71     public final static String PROJECT_VERSION = Manager.class.getPackage().getImplementationVersion();
  72     private final static String USER_AGENT = PROJECT_NAME == null ? null : PROJECT_NAME + " " + PROJECT_VERSION;
  73
  74     private final static int PREKEY_MINIMUM_COUNT = 20;
  75     private static final int PREKEY_BATCH_SIZE = 100;
  76
  77     private final String settingsPath;
  78     private final String dataPath;
  79     private final String attachmentsPath;
  80
  81     private final ObjectMapper jsonProcessot = new ObjectMapper();
  82     private String username;
  83     int deviceId = SignalServiceAddress.DEFAULT_DEVICE_ID;
  84     private String password;
  85     private String signalingKey;
  86     private int preKeyIdOffset;
  87     private int nextSignedPreKeyId;
  88
  89     private boolean registered = false;
  90
  91     private SignalProtocolStore signalProtocolStore;
  92     private SignalServiceAccountManager accountManager;
  93     private JsonGroupStore groupStore;
  94
  95     public Manager(String username, String settingsPath) {
  96         this.username = username;
  97         this.settingsPath = settingsPath;
  98         this.dataPath = this.settingsPath + "/data";
  99         this.attachmentsPath = this.settingsPath + "/attachments";
 100
 101         jsonProcessot.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.NONE); // disable autodetect
 102         jsonProcessot.enable(SerializationFeature.INDENT_OUTPUT); // for pretty print, you can disable it.
 103         jsonProcessot.enable(SerializationFeature.WRITE_NULL_MAP_VALUES);
 104         jsonProcessot.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
 105     }
 106
 107     public String getUsername() {
 108         return username;
 109     }
 110
 111     public String getFileName() {
 112         new File(dataPath).mkdirs();
 113         return dataPath + "/" + username;
 114     }
 115
 116     public boolean userExists() {
 117         if (username == null) {
 118             return false;
 119         }
 120         File f = new File(getFileName());
 121         return !(!f.exists() || f.isDirectory());
 122     }
 123
 124     public boolean userHasKeys() {
 125         return signalProtocolStore != null;
 126     }
 127
 128     private JsonNode getNotNullNode(JsonNode parent, String name) throws InvalidObjectException {
 129         JsonNode node = parent.get(name);
 130         if (node == null) {
 131             throw new InvalidObjectException(String.format("Incorrect file format: expected parameter %s not found ", name));
 132         }
 133
 134         return node;
 135     }
 136
 137     public void load() throws IOException, InvalidKeyException {
 138         JsonNode rootNode = jsonProcessot.readTree(new File(getFileName()));
 139
 140         JsonNode node = rootNode.get("deviceId");
 141         if (node != null) {
 142             deviceId = node.asInt();
 143         }
 144         username = getNotNullNode(rootNode, "username").asText();
 145         password = getNotNullNode(rootNode, "password").asText();
 146         if (rootNode.has("signalingKey")) {
 147             signalingKey = getNotNullNode(rootNode, "signalingKey").asText();
 148         }
 149         if (rootNode.has("preKeyIdOffset")) {
 150             preKeyIdOffset = getNotNullNode(rootNode, "preKeyIdOffset").asInt(0);
 151         } else {
 152             preKeyIdOffset = 0;
 153         }
 154         if (rootNode.has("nextSignedPreKeyId")) {
 155             nextSignedPreKeyId = getNotNullNode(rootNode, "nextSignedPreKeyId").asInt();
 156         } else {
 157             nextSignedPreKeyId = 0;
 158         }
 159         signalProtocolStore = jsonProcessot.convertValue(getNotNullNode(rootNode, "axolotlStore"), JsonSignalProtocolStore.class);
 160         registered = getNotNullNode(rootNode, "registered").asBoolean();
 161         JsonNode groupStoreNode = rootNode.get("groupStore");
 162         if (groupStoreNode != null) {
 163             groupStore = jsonProcessot.convertValue(groupStoreNode, JsonGroupStore.class);
 164         }
 165         if (groupStore == null) {
 166             groupStore = new JsonGroupStore();
 167         }
 168         accountManager = new SignalServiceAccountManager(URL, TRUST_STORE, username, password, deviceId, USER_AGENT);
 169         try {
 170             if (registered && accountManager.getPreKeysCount() < PREKEY_MINIMUM_COUNT) {
 171                 refreshPreKeys();
 172                 save();
 173             }
 174         } catch (AuthorizationFailedException e) {
 175             System.err.println("Authorization failed, was the number registered elsewhere?");
 176         }
 177     }
 178
 179     private void save() {
 180         ObjectNode rootNode = jsonProcessot.createObjectNode();
 181         rootNode.put("username", username)
 182                 .put("deviceId", deviceId)
 183                 .put("password", password)
 184                 .put("signalingKey", signalingKey)
 185                 .put("preKeyIdOffset", preKeyIdOffset)
 186                 .put("nextSignedPreKeyId", nextSignedPreKeyId)
 187                 .put("registered", registered)
 188                 .putPOJO("axolotlStore", signalProtocolStore)
 189                 .putPOJO("groupStore", groupStore)
 190         ;
 191         try {
 192             jsonProcessot.writeValue(new File(getFileName()), rootNode);
 193         } catch (Exception e) {
 194             System.err.println(String.format("Error saving file: %s", e.getMessage()));
 195         }
 196     }
 197
 198     public void createNewIdentity() {
 199         IdentityKeyPair identityKey = KeyHelper.generateIdentityKeyPair();
 200         int registrationId = KeyHelper.generateRegistrationId(false);
 201         signalProtocolStore = new JsonSignalProtocolStore(identityKey, registrationId);
 202         groupStore = new JsonGroupStore();
 203         registered = false;
 204         save();
 205     }
 206
 207     public boolean isRegistered() {
 208         return registered;
 209     }
 210
 211     public void register(boolean voiceVerication) throws IOException {
 212         password = Util.getSecret(18);
 213
 214         accountManager = new SignalServiceAccountManager(URL, TRUST_STORE, username, password, USER_AGENT);
 215
 216         if (voiceVerication)
 217             accountManager.requestVoiceVerificationCode();
 218         else
 219             accountManager.requestSmsVerificationCode();
 220
 221         registered = false;
 222         save();
 223     }
 224
 225     public URI getDeviceLinkUri() throws TimeoutException, IOException {
 226         password = Util.getSecret(18);
 227
 228         accountManager = new SignalServiceAccountManager(URL, TRUST_STORE, username, password, USER_AGENT);
 229         String uuid = accountManager.getNewDeviceUuid();
 230
 231         registered = false;
 232         try {
 233             return new URI("tsdevice:/?uuid=" + URLEncoder.encode(uuid, "utf-8") + "&pub_key=" + URLEncoder.encode(Base64.encodeBytesWithoutPadding(signalProtocolStore.getIdentityKeyPair().getPublicKey().serialize()), "utf-8"));
 234         } catch (URISyntaxException e) {
 235             // Shouldn't happen
 236             return null;
 237         }
 238     }
 239
 240     public void finishDeviceLink(String deviceName) throws IOException, InvalidKeyException, TimeoutException, UserAlreadyExists {
 241         signalingKey = Util.getSecret(52);
 242         SignalServiceAccountManager.NewDeviceRegistrationReturn ret = accountManager.finishNewDeviceRegistration(signalProtocolStore.getIdentityKeyPair(), signalingKey, false, true, signalProtocolStore.getLocalRegistrationId(), deviceName);
 243         deviceId = ret.getDeviceId();
 244         username = ret.getNumber();
 245         // TODO do this check before actually registering
 246         if (userExists()) {
 247             throw new UserAlreadyExists(username, getFileName());
 248         }
 249         signalProtocolStore = new JsonSignalProtocolStore(ret.getIdentity(), signalProtocolStore.getLocalRegistrationId());
 250
 251         registered = true;
 252         refreshPreKeys();
 253         save();
 254     }
 255
 256
 257     public static Map<String, String> getQueryMap(String query) {
 258         String[] params = query.split("&");
 259         Map<String, String> map = new HashMap<>();
 260         for (String param : params) {
 261             String name = null;
 262             try {
 263                 name = URLDecoder.decode(param.split("=")[0], "utf-8");
 264             } catch (UnsupportedEncodingException e) {
 265                 // Impossible
 266             }
 267             String value = null;
 268             try {
 269                 value = URLDecoder.decode(param.split("=")[1], "utf-8");
 270             } catch (UnsupportedEncodingException e) {
 271                 // Impossible
 272             }
 273             map.put(name, value);
 274         }
 275         return map;
 276     }
 277
 278     public void addDeviceLink(URI linkUri) throws IOException, InvalidKeyException {
 279         Map<String, String> query = getQueryMap(linkUri.getQuery());
 280         String deviceIdentifier = query.get("uuid");
 281         String publicKeyEncoded = query.get("pub_key");
 282
 283         if (TextUtils.isEmpty(deviceIdentifier) || TextUtils.isEmpty(publicKeyEncoded)) {
 284             throw new RuntimeException("Invalid device link uri");
 285         }
 286
 287         ECPublicKey deviceKey = Curve.decodePoint(Base64.decode(publicKeyEncoded), 0);
 288
 289         addDeviceLink(deviceIdentifier, deviceKey);
 290     }
 291
 292     private void addDeviceLink(String deviceIdentifier, ECPublicKey deviceKey) throws IOException, InvalidKeyException {
 293         IdentityKeyPair identityKeyPair = signalProtocolStore.getIdentityKeyPair();
 294         String verificationCode = accountManager.getNewDeviceVerificationCode();
 295
 296         accountManager.addDevice(deviceIdentifier, deviceKey, identityKeyPair, verificationCode);
 297     }
 298
 299     private List<PreKeyRecord> generatePreKeys() {
 300         List<PreKeyRecord> records = new LinkedList<>();
 301
 302         for (int i = 0; i < PREKEY_BATCH_SIZE; i++) {
 303             int preKeyId = (preKeyIdOffset + i) % Medium.MAX_VALUE;
 304             ECKeyPair keyPair = Curve.generateKeyPair();
 305             PreKeyRecord record = new PreKeyRecord(preKeyId, keyPair);
 306
 307             signalProtocolStore.storePreKey(preKeyId, record);
 308             records.add(record);
 309         }
 310
 311         preKeyIdOffset = (preKeyIdOffset + PREKEY_BATCH_SIZE + 1) % Medium.MAX_VALUE;
 312         save();
 313
 314         return records;
 315     }
 316
 317     private PreKeyRecord getOrGenerateLastResortPreKey() {
 318         if (signalProtocolStore.containsPreKey(Medium.MAX_VALUE)) {
 319             try {
 320                 return signalProtocolStore.loadPreKey(Medium.MAX_VALUE);
 321             } catch (InvalidKeyIdException e) {
 322                 signalProtocolStore.removePreKey(Medium.MAX_VALUE);
 323             }
 324         }
 325
 326         ECKeyPair keyPair = Curve.generateKeyPair();
 327         PreKeyRecord record = new PreKeyRecord(Medium.MAX_VALUE, keyPair);
 328
 329         signalProtocolStore.storePreKey(Medium.MAX_VALUE, record);
 330         save();
 331
 332         return record;
 333     }
 334
 335     private SignedPreKeyRecord generateSignedPreKey(IdentityKeyPair identityKeyPair) {
 336         try {
 337             ECKeyPair keyPair = Curve.generateKeyPair();
 338             byte[] signature = Curve.calculateSignature(identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
 339             SignedPreKeyRecord record = new SignedPreKeyRecord(nextSignedPreKeyId, System.currentTimeMillis(), keyPair, signature);
 340
 341             signalProtocolStore.storeSignedPreKey(nextSignedPreKeyId, record);
 342             nextSignedPreKeyId = (nextSignedPreKeyId + 1) % Medium.MAX_VALUE;
 343             save();
 344
 345             return record;
 346         } catch (InvalidKeyException e) {
 347             throw new AssertionError(e);
 348         }
 349     }
 350
 351     public void verifyAccount(String verificationCode) throws IOException {
 352         verificationCode = verificationCode.replace("-", "");
 353         signalingKey = Util.getSecret(52);
 354         accountManager.verifyAccountWithCode(verificationCode, signalingKey, signalProtocolStore.getLocalRegistrationId(), false, true);
 355
 356         //accountManager.setGcmId(Optional.of(GoogleCloudMessaging.getInstance(this).register(REGISTRATION_ID)));
 357         registered = true;
 358
 359         refreshPreKeys();
 360         save();
 361     }
 362
 363     private void refreshPreKeys() throws IOException {
 364         List<PreKeyRecord> oneTimePreKeys = generatePreKeys();
 365         PreKeyRecord lastResortKey = getOrGenerateLastResortPreKey();
 366         SignedPreKeyRecord signedPreKeyRecord = generateSignedPreKey(signalProtocolStore.getIdentityKeyPair());
 367
 368         accountManager.setPreKeys(signalProtocolStore.getIdentityKeyPair().getPublicKey(), lastResortKey, signedPreKeyRecord, oneTimePreKeys);
 369     }
 370
 371
 372     private static List<SignalServiceAttachment> getSignalServiceAttachments(List<String> attachments) throws AttachmentInvalidException {
 373         List<SignalServiceAttachment> SignalServiceAttachments = null;
 374         if (attachments != null) {
 375             SignalServiceAttachments = new ArrayList<>(attachments.size());
 376             for (String attachment : attachments) {
 377                 try {
 378                     SignalServiceAttachments.add(createAttachment(attachment));
 379                 } catch (IOException e) {
 380                     throw new AttachmentInvalidException(attachment, e);
 381                 }
 382             }
 383         }
 384         return SignalServiceAttachments;
 385     }
 386
 387     private static SignalServiceAttachmentStream createAttachment(String attachment) throws IOException {
 388         File attachmentFile = new File(attachment);
 389         InputStream attachmentStream = new FileInputStream(attachmentFile);
 390         final long attachmentSize = attachmentFile.length();
 391         String mime = Files.probeContentType(Paths.get(attachment));
 392         return new SignalServiceAttachmentStream(attachmentStream, mime, attachmentSize, null);
 393     }
 394
 395     @Override
 396     public void sendGroupMessage(String messageText, List<String> attachments,
 397                                  byte[] groupId)
 398             throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException, UntrustedIdentityException {
 399         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 400         if (attachments != null) {
 401             messageBuilder.withAttachments(getSignalServiceAttachments(attachments));
 402         }
 403         if (groupId != null) {
 404             SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.DELIVER)
 405                     .withId(groupId)
 406                     .build();
 407             messageBuilder.asGroupMessage(group);
 408         }
 409         SignalServiceDataMessage message = messageBuilder.build();
 410
 411         sendMessage(message, groupStore.getGroup(groupId).members);
 412     }
 413
 414     public void sendQuitGroupMessage(byte[] groupId) throws GroupNotFoundException, IOException, EncapsulatedExceptions, UntrustedIdentityException {
 415         SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
 416                 .withId(groupId)
 417                 .build();
 418
 419         SignalServiceDataMessage message = SignalServiceDataMessage.newBuilder()
 420                 .asGroupMessage(group)
 421                 .build();
 422
 423         sendMessage(message, groupStore.getGroup(groupId).members);
 424     }
 425
 426     public byte[] sendUpdateGroupMessage(byte[] groupId, String name, Collection<String> members, String avatarFile) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException, UntrustedIdentityException {
 427         GroupInfo g;
 428         if (groupId == null) {
 429             // Create new group
 430             g = new GroupInfo(Util.getSecretBytes(16));
 431             g.members.add(username);
 432         } else {
 433             g = groupStore.getGroup(groupId);
 434         }
 435
 436         if (name != null) {
 437             g.name = name;
 438         }
 439
 440         if (members != null) {
 441             for (String member : members) {
 442                 try {
 443                     g.members.add(canonicalizeNumber(member));
 444                 } catch (InvalidNumberException e) {
 445                     System.err.println("Failed to add member \"" + member + "\" to group: " + e.getMessage());
 446                     System.err.println("Aborting…");
 447                     System.exit(1);
 448                 }
 449             }
 450         }
 451
 452         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.UPDATE)
 453                 .withId(g.groupId)
 454                 .withName(g.name)
 455                 .withMembers(new ArrayList<>(g.members));
 456
 457         if (avatarFile != null) {
 458             try {
 459                 group.withAvatar(createAttachment(avatarFile));
 460                 // TODO
 461                 g.avatarId = 0;
 462             } catch (IOException e) {
 463                 throw new AttachmentInvalidException(avatarFile, e);
 464             }
 465         }
 466
 467         groupStore.updateGroup(g);
 468
 469         SignalServiceDataMessage message = SignalServiceDataMessage.newBuilder()
 470                 .asGroupMessage(group.build())
 471                 .build();
 472
 473         sendMessage(message, g.members);
 474         return g.groupId;
 475     }
 476
 477     @Override
 478     public void sendMessage(String message, List<String> attachments, String recipient)
 479             throws EncapsulatedExceptions, AttachmentInvalidException, IOException, UntrustedIdentityException {
 480         List<String> recipients = new ArrayList<>(1);
 481         recipients.add(recipient);
 482         sendMessage(message, attachments, recipients);
 483     }
 484
 485     @Override
 486     public void sendMessage(String messageText, List<String> attachments,
 487                             List<String> recipients)
 488             throws IOException, EncapsulatedExceptions, AttachmentInvalidException, UntrustedIdentityException {
 489         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 490         if (attachments != null) {
 491             messageBuilder.withAttachments(getSignalServiceAttachments(attachments));
 492         }
 493         SignalServiceDataMessage message = messageBuilder.build();
 494
 495         sendMessage(message, recipients);
 496     }
 497
 498     @Override
 499     public void sendEndSessionMessage(List<String> recipients) throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 500         SignalServiceDataMessage message = SignalServiceDataMessage.newBuilder()
 501                 .asEndSessionMessage()
 502                 .build();
 503
 504         sendMessage(message, recipients);
 505     }
 506
 507     private void sendMessage(SignalServiceDataMessage message, Collection<String> recipients)
 508             throws IOException, EncapsulatedExceptions, UntrustedIdentityException {
 509         SignalServiceMessageSender messageSender = new SignalServiceMessageSender(URL, TRUST_STORE, username, password,
 510                 deviceId, signalProtocolStore, USER_AGENT, Optional.<SignalServiceMessageSender.EventListener>absent());
 511
 512         Set<SignalServiceAddress> recipientsTS = new HashSet<>(recipients.size());
 513         for (String recipient : recipients) {
 514             try {
 515                 recipientsTS.add(getPushAddress(recipient));
 516             } catch (InvalidNumberException e) {
 517                 System.err.println("Failed to add recipient \"" + recipient + "\": " + e.getMessage());
 518                 System.err.println("Aborting sending.");
 519                 save();
 520                 return;
 521             }
 522         }
 523
 524         if (message.getGroupInfo().isPresent()) {
 525             messageSender.sendMessage(new ArrayList<>(recipientsTS), message);
 526         } else {
 527             // Send to all individually, so sync messages are sent correctly
 528             for (SignalServiceAddress address : recipientsTS) {
 529                 messageSender.sendMessage(address, message);
 530             }
 531         }
 532
 533         if (message.isEndSession()) {
 534             for (SignalServiceAddress recipient : recipientsTS) {
 535                 handleEndSession(recipient.getNumber());
 536             }
 537         }
 538         save();
 539     }
 540
 541     private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) {
 542         SignalServiceCipher cipher = new SignalServiceCipher(new SignalServiceAddress(username), signalProtocolStore);
 543         try {
 544             return cipher.decrypt(envelope);
 545         } catch (Exception e) {
 546             // TODO handle all exceptions
 547             e.printStackTrace();
 548             return null;
 549         }
 550     }
 551
 552     private void handleEndSession(String source) {
 553         signalProtocolStore.deleteAllSessions(source);
 554     }
 555
 556     public interface ReceiveMessageHandler {
 557         void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent decryptedContent, GroupInfo group);
 558     }
 559
 560     private GroupInfo handleSignalServiceDataMessage(SignalServiceDataMessage message, boolean isSync, String source, String destination) {
 561         GroupInfo group = null;
 562         if (message.getGroupInfo().isPresent()) {
 563             SignalServiceGroup groupInfo = message.getGroupInfo().get();
 564             switch (groupInfo.getType()) {
 565                 case UPDATE:
 566                     try {
 567                         group = groupStore.getGroup(groupInfo.getGroupId());
 568                     } catch (GroupNotFoundException e) {
 569                         group = new GroupInfo(groupInfo.getGroupId());
 570                     }
 571
 572                     if (groupInfo.getAvatar().isPresent()) {
 573                         SignalServiceAttachment avatar = groupInfo.getAvatar().get();
 574                         if (avatar.isPointer()) {
 575                             long avatarId = avatar.asPointer().getId();
 576                             try {
 577                                 retrieveAttachment(avatar.asPointer());
 578                                 group.avatarId = avatarId;
 579                             } catch (IOException | InvalidMessageException e) {
 580                                 System.err.println("Failed to retrieve group avatar (" + avatarId + "): " + e.getMessage());
 581                             }
 582                         }
 583                     }
 584
 585                     if (groupInfo.getName().isPresent()) {
 586                         group.name = groupInfo.getName().get();
 587                     }
 588
 589                     if (groupInfo.getMembers().isPresent()) {
 590                         group.members.addAll(groupInfo.getMembers().get());
 591                     }
 592
 593                     groupStore.updateGroup(group);
 594                     break;
 595                 case DELIVER:
 596                     try {
 597                         group = groupStore.getGroup(groupInfo.getGroupId());
 598                     } catch (GroupNotFoundException e) {
 599                     }
 600                     break;
 601                 case QUIT:
 602                     try {
 603                         group = groupStore.getGroup(groupInfo.getGroupId());
 604                         group.members.remove(source);
 605                     } catch (GroupNotFoundException e) {
 606                     }
 607                     break;
 608             }
 609         }
 610         if (message.isEndSession()) {
 611             handleEndSession(isSync ? destination : source);
 612         }
 613         if (message.getAttachments().isPresent()) {
 614             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
 615                 if (attachment.isPointer()) {
 616                     try {
 617                         retrieveAttachment(attachment.asPointer());
 618                     } catch (IOException | InvalidMessageException e) {
 619                         System.err.println("Failed to retrieve attachment (" + attachment.asPointer().getId() + "): " + e.getMessage());
 620                     }
 621                 }
 622             }
 623         }
 624         return group;
 625     }
 626
 627     public void receiveMessages(int timeoutSeconds, boolean returnOnTimeout, ReceiveMessageHandler handler) throws IOException {
 628         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(URL, TRUST_STORE, username, password, deviceId, signalingKey, USER_AGENT);
 629         SignalServiceMessagePipe messagePipe = null;
 630
 631         try {
 632             messagePipe = messageReceiver.createMessagePipe();
 633
 634             while (true) {
 635                 SignalServiceEnvelope envelope;
 636                 SignalServiceContent content = null;
 637                 GroupInfo group = null;
 638                 try {
 639                     envelope = messagePipe.read(timeoutSeconds, TimeUnit.SECONDS);
 640                     if (!envelope.isReceipt()) {
 641                         content = decryptMessage(envelope);
 642                         if (content != null) {
 643                             if (content.getDataMessage().isPresent()) {
 644                                 SignalServiceDataMessage message = content.getDataMessage().get();
 645                                 group = handleSignalServiceDataMessage(message, false, envelope.getSource(), username);
 646                             }
 647                             if (content.getSyncMessage().isPresent()) {
 648                                 SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
 649                                 if (syncMessage.getSent().isPresent()) {
 650                                     SignalServiceDataMessage message = syncMessage.getSent().get().getMessage();
 651                                     group = handleSignalServiceDataMessage(message, true, envelope.getSource(), syncMessage.getSent().get().getDestination().get());
 652                                 }
 653                                 if (syncMessage.getRequest().isPresent()) {
 654                                     // TODO
 655                                 }
 656                                 if (syncMessage.getGroups().isPresent()) {
 657                                     // TODO
 658                                 }
 659                             }
 660                         }
 661                     }
 662                     save();
 663                     handler.handleMessage(envelope, content, group);
 664                 } catch (TimeoutException e) {
 665                     if (returnOnTimeout)
 666                         return;
 667                 } catch (InvalidVersionException e) {
 668                     System.err.println("Ignoring error: " + e.getMessage());
 669                 }
 670             }
 671         } finally {
 672             if (messagePipe != null)
 673                 messagePipe.shutdown();
 674         }
 675     }
 676
 677     public File getAttachmentFile(long attachmentId) {
 678         return new File(attachmentsPath, attachmentId + "");
 679     }
 680
 681     private File retrieveAttachment(SignalServiceAttachmentPointer pointer) throws IOException, InvalidMessageException {
 682         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(URL, TRUST_STORE, username, password, deviceId, signalingKey, USER_AGENT);
 683
 684         File tmpFile = File.createTempFile("ts_attach_" + pointer.getId(), ".tmp");
 685         InputStream input = messageReceiver.retrieveAttachment(pointer, tmpFile);
 686
 687         new File(attachmentsPath).mkdirs();
 688         File outputFile = getAttachmentFile(pointer.getId());
 689         OutputStream output = null;
 690         try {
 691             output = new FileOutputStream(outputFile);
 692             byte[] buffer = new byte[4096];
 693             int read;
 694
 695             while ((read = input.read(buffer)) != -1) {
 696                 output.write(buffer, 0, read);
 697             }
 698         } catch (FileNotFoundException e) {
 699             e.printStackTrace();
 700             return null;
 701         } finally {
 702             if (output != null) {
 703                 output.close();
 704                 output = null;
 705             }
 706             if (!tmpFile.delete()) {
 707                 System.err.println("Failed to delete temp file: " + tmpFile);
 708             }
 709         }
 710         if (pointer.getPreview().isPresent()) {
 711             File previewFile = new File(outputFile + ".preview");
 712             try {
 713                 output = new FileOutputStream(previewFile);
 714                 byte[] preview = pointer.getPreview().get();
 715                 output.write(preview, 0, preview.length);
 716             } catch (FileNotFoundException e) {
 717                 e.printStackTrace();
 718                 return null;
 719             } finally {
 720                 if (output != null) {
 721                     output.close();
 722                 }
 723             }
 724         }
 725         return outputFile;
 726     }
 727
 728     private String canonicalizeNumber(String number) throws InvalidNumberException {
 729         String localNumber = username;
 730         return PhoneNumberFormatter.formatNumber(number, localNumber);
 731     }
 732
 733     private SignalServiceAddress getPushAddress(String number) throws InvalidNumberException {
 734         String e164number = canonicalizeNumber(number);
 735         return new SignalServiceAddress(e164number);
 736     }
 737
 738     @Override
 739     public boolean isRemote() {
 740         return false;
 741     }
 742 }