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

   1 /*
   2   Copyright (C) 2015-2020 AsamK and contributors
   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.manager;
  18
  19 import org.asamk.Signal;
  20 import org.asamk.signal.AttachmentInvalidException;
  21 import org.asamk.signal.GroupNotFoundException;
  22 import org.asamk.signal.NotAGroupMemberException;
  23 import org.asamk.signal.TrustLevel;
  24 import org.asamk.signal.UserAlreadyExists;
  25 import org.asamk.signal.storage.SignalAccount;
  26 import org.asamk.signal.storage.contacts.ContactInfo;
  27 import org.asamk.signal.storage.groups.GroupInfo;
  28 import org.asamk.signal.storage.groups.JsonGroupStore;
  29 import org.asamk.signal.storage.protocol.JsonIdentityKeyStore;
  30 import org.asamk.signal.storage.threads.ThreadInfo;
  31 import org.asamk.signal.util.IOUtils;
  32 import org.asamk.signal.util.Util;
  33 import org.signal.libsignal.metadata.InvalidMetadataMessageException;
  34 import org.signal.libsignal.metadata.InvalidMetadataVersionException;
  35 import org.signal.libsignal.metadata.ProtocolDuplicateMessageException;
  36 import org.signal.libsignal.metadata.ProtocolInvalidKeyException;
  37 import org.signal.libsignal.metadata.ProtocolInvalidKeyIdException;
  38 import org.signal.libsignal.metadata.ProtocolInvalidMessageException;
  39 import org.signal.libsignal.metadata.ProtocolInvalidVersionException;
  40 import org.signal.libsignal.metadata.ProtocolLegacyMessageException;
  41 import org.signal.libsignal.metadata.ProtocolNoSessionException;
  42 import org.signal.libsignal.metadata.ProtocolUntrustedIdentityException;
  43 import org.signal.libsignal.metadata.SelfSendException;
  44 import org.whispersystems.libsignal.IdentityKey;
  45 import org.whispersystems.libsignal.IdentityKeyPair;
  46 import org.whispersystems.libsignal.InvalidKeyException;
  47 import org.whispersystems.libsignal.InvalidMessageException;
  48 import org.whispersystems.libsignal.InvalidVersionException;
  49 import org.whispersystems.libsignal.ecc.Curve;
  50 import org.whispersystems.libsignal.ecc.ECKeyPair;
  51 import org.whispersystems.libsignal.ecc.ECPublicKey;
  52 import org.whispersystems.libsignal.state.PreKeyRecord;
  53 import org.whispersystems.libsignal.state.SignedPreKeyRecord;
  54 import org.whispersystems.libsignal.util.KeyHelper;
  55 import org.whispersystems.libsignal.util.Medium;
  56 import org.whispersystems.libsignal.util.guava.Optional;
  57 import org.whispersystems.signalservice.api.SignalServiceAccountManager;
  58 import org.whispersystems.signalservice.api.SignalServiceMessagePipe;
  59 import org.whispersystems.signalservice.api.SignalServiceMessageReceiver;
  60 import org.whispersystems.signalservice.api.SignalServiceMessageSender;
  61 import org.whispersystems.signalservice.api.crypto.SignalServiceCipher;
  62 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccess;
  63 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccessPair;
  64 import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
  65 import org.whispersystems.signalservice.api.messages.SendMessageResult;
  66 import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
  67 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentPointer;
  68 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentStream;
  69 import org.whispersystems.signalservice.api.messages.SignalServiceContent;
  70 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
  71 import org.whispersystems.signalservice.api.messages.SignalServiceEnvelope;
  72 import org.whispersystems.signalservice.api.messages.SignalServiceGroup;
  73 import org.whispersystems.signalservice.api.messages.multidevice.ContactsMessage;
  74 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContact;
  75 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContactsInputStream;
  76 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContactsOutputStream;
  77 import org.whispersystems.signalservice.api.messages.multidevice.DeviceGroup;
  78 import org.whispersystems.signalservice.api.messages.multidevice.DeviceGroupsInputStream;
  79 import org.whispersystems.signalservice.api.messages.multidevice.DeviceGroupsOutputStream;
  80 import org.whispersystems.signalservice.api.messages.multidevice.DeviceInfo;
  81 import org.whispersystems.signalservice.api.messages.multidevice.RequestMessage;
  82 import org.whispersystems.signalservice.api.messages.multidevice.SentTranscriptMessage;
  83 import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
  84 import org.whispersystems.signalservice.api.messages.multidevice.VerifiedMessage;
  85 import org.whispersystems.signalservice.api.push.ContactTokenDetails;
  86 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
  87 import org.whispersystems.signalservice.api.push.exceptions.AuthorizationFailedException;
  88 import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
  89 import org.whispersystems.signalservice.api.push.exceptions.NetworkFailureException;
  90 import org.whispersystems.signalservice.api.push.exceptions.UnregisteredUserException;
  91 import org.whispersystems.signalservice.api.util.InvalidNumberException;
  92 import org.whispersystems.signalservice.api.util.SleepTimer;
  93 import org.whispersystems.signalservice.api.util.StreamDetails;
  94 import org.whispersystems.signalservice.api.util.UptimeSleepTimer;
  95 import org.whispersystems.signalservice.internal.push.SignalServiceProtos;
  96 import org.whispersystems.signalservice.internal.push.UnsupportedDataMessageException;
  97 import org.whispersystems.util.Base64;
  98
  99 import java.io.File;
 100 import java.io.FileInputStream;
 101 import java.io.FileNotFoundException;
 102 import java.io.FileOutputStream;
 103 import java.io.IOException;
 104 import java.io.InputStream;
 105 import java.io.OutputStream;
 106 import java.net.URI;
 107 import java.nio.file.Files;
 108 import java.nio.file.Paths;
 109 import java.nio.file.StandardCopyOption;
 110 import java.util.ArrayList;
 111 import java.util.Arrays;
 112 import java.util.Collection;
 113 import java.util.Collections;
 114 import java.util.Date;
 115 import java.util.HashSet;
 116 import java.util.LinkedList;
 117 import java.util.List;
 118 import java.util.Locale;
 119 import java.util.Map;
 120 import java.util.Objects;
 121 import java.util.Set;
 122 import java.util.concurrent.TimeUnit;
 123 import java.util.concurrent.TimeoutException;
 124
 125 public class Manager implements Signal {
 126
 127     private final String settingsPath;
 128     private final String dataPath;
 129     private final String attachmentsPath;
 130     private final String avatarsPath;
 131     private final SleepTimer timer = new UptimeSleepTimer();
 132
 133     private SignalAccount account;
 134     private String username;
 135     private SignalServiceAccountManager accountManager;
 136     private SignalServiceMessagePipe messagePipe = null;
 137     private SignalServiceMessagePipe unidentifiedMessagePipe = null;
 138
 139     public Manager(String username, String settingsPath) {
 140         this.username = username;
 141         this.settingsPath = settingsPath;
 142         this.dataPath = this.settingsPath + "/data";
 143         this.attachmentsPath = this.settingsPath + "/attachments";
 144         this.avatarsPath = this.settingsPath + "/avatars";
 145
 146     }
 147
 148     public String getUsername() {
 149         return username;
 150     }
 151
 152     private SignalServiceAddress getSelfAddress() {
 153         return new SignalServiceAddress(null, username);
 154     }
 155
 156     private SignalServiceAccountManager getSignalServiceAccountManager() {
 157         return new SignalServiceAccountManager(BaseConfig.serviceConfiguration, null, account.getUsername(), account.getPassword(), account.getDeviceId(), BaseConfig.USER_AGENT, timer);
 158     }
 159
 160     private IdentityKey getIdentity() {
 161         return account.getSignalProtocolStore().getIdentityKeyPair().getPublicKey();
 162     }
 163
 164     public int getDeviceId() {
 165         return account.getDeviceId();
 166     }
 167
 168     private String getMessageCachePath() {
 169         return this.dataPath + "/" + username + ".d/msg-cache";
 170     }
 171
 172     private String getMessageCachePath(String sender) {
 173         return getMessageCachePath() + "/" + sender.replace("/", "_");
 174     }
 175
 176     private File getMessageCacheFile(String sender, long now, long timestamp) throws IOException {
 177         String cachePath = getMessageCachePath(sender);
 178         IOUtils.createPrivateDirectories(cachePath);
 179         return new File(cachePath + "/" + now + "_" + timestamp);
 180     }
 181
 182     public boolean userHasKeys() {
 183         return account != null && account.getSignalProtocolStore() != null;
 184     }
 185
 186     public void init() throws IOException {
 187         if (!SignalAccount.userExists(dataPath, username)) {
 188             return;
 189         }
 190         account = SignalAccount.load(dataPath, username);
 191
 192         migrateLegacyConfigs();
 193
 194         accountManager = getSignalServiceAccountManager();
 195         try {
 196             if (account.isRegistered() && accountManager.getPreKeysCount() < BaseConfig.PREKEY_MINIMUM_COUNT) {
 197                 refreshPreKeys();
 198                 account.save();
 199             }
 200         } catch (AuthorizationFailedException e) {
 201             System.err.println("Authorization failed, was the number registered elsewhere?");
 202             throw e;
 203         }
 204     }
 205
 206     private void migrateLegacyConfigs() {
 207         // Copy group avatars that were previously stored in the attachments folder
 208         // to the new avatar folder
 209         if (JsonGroupStore.groupsWithLegacyAvatarId.size() > 0) {
 210             for (GroupInfo g : JsonGroupStore.groupsWithLegacyAvatarId) {
 211                 File avatarFile = getGroupAvatarFile(g.groupId);
 212                 File attachmentFile = getAttachmentFile(g.getAvatarId());
 213                 if (!avatarFile.exists() && attachmentFile.exists()) {
 214                     try {
 215                         IOUtils.createPrivateDirectories(avatarsPath);
 216                         Files.copy(attachmentFile.toPath(), avatarFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
 217                     } catch (Exception e) {
 218                         // Ignore
 219                     }
 220                 }
 221             }
 222             JsonGroupStore.groupsWithLegacyAvatarId.clear();
 223             account.save();
 224         }
 225         if (account.getProfileKey() == null) {
 226             // Old config file, creating new profile key
 227             account.setProfileKey(KeyUtils.createProfileKey());
 228             account.save();
 229         }
 230     }
 231
 232     private void createNewIdentity() throws IOException {
 233         IdentityKeyPair identityKey = KeyHelper.generateIdentityKeyPair();
 234         int registrationId = KeyHelper.generateRegistrationId(false);
 235         if (username == null) {
 236             account = SignalAccount.createTemporaryAccount(identityKey, registrationId);
 237         } else {
 238             byte[] profileKey = KeyUtils.createProfileKey();
 239             account = SignalAccount.create(dataPath, username, identityKey, registrationId, profileKey);
 240             account.save();
 241         }
 242     }
 243
 244     public boolean isRegistered() {
 245         return account != null && account.isRegistered();
 246     }
 247
 248     public void register(boolean voiceVerification) throws IOException {
 249         if (account == null) {
 250             createNewIdentity();
 251         }
 252         account.setPassword(KeyUtils.createPassword());
 253         accountManager = getSignalServiceAccountManager();
 254
 255         if (voiceVerification) {
 256             accountManager.requestVoiceVerificationCode(Locale.getDefault(), Optional.<String>absent(), Optional.<String>absent());
 257         } else {
 258             accountManager.requestSmsVerificationCode(false, Optional.<String>absent(), Optional.<String>absent());
 259         }
 260
 261         account.setRegistered(false);
 262         account.save();
 263     }
 264
 265     public void updateAccountAttributes() throws IOException {
 266         accountManager.setAccountAttributes(account.getSignalingKey(), account.getSignalProtocolStore().getLocalRegistrationId(), true, account.getRegistrationLockPin(), getSelfUnidentifiedAccessKey(), false);
 267     }
 268
 269     public void setProfileName(String name) throws IOException {
 270         accountManager.setProfileName(account.getProfileKey(), name);
 271     }
 272
 273     public void setProfileAvatar(File avatar) throws IOException {
 274         final StreamDetails streamDetails = Utils.createStreamDetailsFromFile(avatar);
 275         accountManager.setProfileAvatar(account.getProfileKey(), streamDetails);
 276         streamDetails.getStream().close();
 277     }
 278
 279     public void removeProfileAvatar() throws IOException {
 280         accountManager.setProfileAvatar(account.getProfileKey(), null);
 281     }
 282
 283     public void unregister() throws IOException {
 284         // When setting an empty GCM id, the Signal-Server also sets the fetchesMessages property to false.
 285         // If this is the master device, other users can't send messages to this number anymore.
 286         // If this is a linked device, other users can still send messages, but this device doesn't receive them anymore.
 287         accountManager.setGcmId(Optional.<String>absent());
 288
 289         account.setRegistered(false);
 290         account.save();
 291     }
 292
 293     public String getDeviceLinkUri() throws TimeoutException, IOException {
 294         if (account == null) {
 295             createNewIdentity();
 296         }
 297         account.setPassword(KeyUtils.createPassword());
 298         accountManager = getSignalServiceAccountManager();
 299         String uuid = accountManager.getNewDeviceUuid();
 300
 301         return Utils.createDeviceLinkUri(new Utils.DeviceLinkInfo(uuid, getIdentity().getPublicKey()));
 302     }
 303
 304     public void finishDeviceLink(String deviceName) throws IOException, InvalidKeyException, TimeoutException, UserAlreadyExists {
 305         account.setSignalingKey(KeyUtils.createSignalingKey());
 306         SignalServiceAccountManager.NewDeviceRegistrationReturn ret = accountManager.finishNewDeviceRegistration(account.getSignalProtocolStore().getIdentityKeyPair(), account.getSignalingKey(), false, true, account.getSignalProtocolStore().getLocalRegistrationId(), deviceName);
 307
 308         username = ret.getNumber();
 309         // TODO do this check before actually registering
 310         if (SignalAccount.userExists(dataPath, username)) {
 311             throw new UserAlreadyExists(username, SignalAccount.getFileName(dataPath, username));
 312         }
 313
 314         // Create new account with the synced identity
 315         byte[] profileKey = ret.getProfileKey();
 316         if (profileKey == null) {
 317             profileKey = KeyUtils.createProfileKey();
 318         }
 319         account = SignalAccount.createLinkedAccount(dataPath, username, account.getPassword(), ret.getDeviceId(), ret.getIdentity(), account.getSignalProtocolStore().getLocalRegistrationId(), account.getSignalingKey(), profileKey);
 320
 321         refreshPreKeys();
 322
 323         requestSyncGroups();
 324         requestSyncContacts();
 325         requestSyncBlocked();
 326         requestSyncConfiguration();
 327
 328         account.save();
 329     }
 330
 331     public List<DeviceInfo> getLinkedDevices() throws IOException {
 332         List<DeviceInfo> devices = accountManager.getDevices();
 333         account.setMultiDevice(devices.size() > 1);
 334         account.save();
 335         return devices;
 336     }
 337
 338     public void removeLinkedDevices(int deviceId) throws IOException {
 339         accountManager.removeDevice(deviceId);
 340         List<DeviceInfo> devices = accountManager.getDevices();
 341         account.setMultiDevice(devices.size() > 1);
 342         account.save();
 343     }
 344
 345     public void addDeviceLink(URI linkUri) throws IOException, InvalidKeyException {
 346         Utils.DeviceLinkInfo info = Utils.parseDeviceLinkUri(linkUri);
 347
 348         addDevice(info.deviceIdentifier, info.deviceKey);
 349     }
 350
 351     private void addDevice(String deviceIdentifier, ECPublicKey deviceKey) throws IOException, InvalidKeyException {
 352         IdentityKeyPair identityKeyPair = account.getSignalProtocolStore().getIdentityKeyPair();
 353         String verificationCode = accountManager.getNewDeviceVerificationCode();
 354
 355         accountManager.addDevice(deviceIdentifier, deviceKey, identityKeyPair, Optional.of(account.getProfileKey()), verificationCode);
 356         account.setMultiDevice(true);
 357         account.save();
 358     }
 359
 360     private List<PreKeyRecord> generatePreKeys() {
 361         List<PreKeyRecord> records = new ArrayList<>(BaseConfig.PREKEY_BATCH_SIZE);
 362
 363         final int offset = account.getPreKeyIdOffset();
 364         for (int i = 0; i < BaseConfig.PREKEY_BATCH_SIZE; i++) {
 365             int preKeyId = (offset + i) % Medium.MAX_VALUE;
 366             ECKeyPair keyPair = Curve.generateKeyPair();
 367             PreKeyRecord record = new PreKeyRecord(preKeyId, keyPair);
 368
 369             records.add(record);
 370         }
 371
 372         account.addPreKeys(records);
 373         account.save();
 374
 375         return records;
 376     }
 377
 378     private SignedPreKeyRecord generateSignedPreKey(IdentityKeyPair identityKeyPair) {
 379         try {
 380             ECKeyPair keyPair = Curve.generateKeyPair();
 381             byte[] signature = Curve.calculateSignature(identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
 382             SignedPreKeyRecord record = new SignedPreKeyRecord(account.getNextSignedPreKeyId(), System.currentTimeMillis(), keyPair, signature);
 383
 384             account.addSignedPreKey(record);
 385             account.save();
 386
 387             return record;
 388         } catch (InvalidKeyException e) {
 389             throw new AssertionError(e);
 390         }
 391     }
 392
 393     public void verifyAccount(String verificationCode, String pin) throws IOException {
 394         verificationCode = verificationCode.replace("-", "");
 395         account.setSignalingKey(KeyUtils.createSignalingKey());
 396         // TODO make unrestricted unidentified access configurable
 397         accountManager.verifyAccountWithCode(verificationCode, account.getSignalingKey(), account.getSignalProtocolStore().getLocalRegistrationId(), true, pin, getSelfUnidentifiedAccessKey(), false);
 398
 399         //accountManager.setGcmId(Optional.of(GoogleCloudMessaging.getInstance(this).register(REGISTRATION_ID)));
 400         account.setRegistered(true);
 401         account.setRegistrationLockPin(pin);
 402
 403         refreshPreKeys();
 404         account.save();
 405     }
 406
 407     public void setRegistrationLockPin(Optional<String> pin) throws IOException {
 408         accountManager.setPin(pin);
 409         if (pin.isPresent()) {
 410             account.setRegistrationLockPin(pin.get());
 411         } else {
 412             account.setRegistrationLockPin(null);
 413         }
 414         account.save();
 415     }
 416
 417     private void refreshPreKeys() throws IOException {
 418         List<PreKeyRecord> oneTimePreKeys = generatePreKeys();
 419         final IdentityKeyPair identityKeyPair = account.getSignalProtocolStore().getIdentityKeyPair();
 420         SignedPreKeyRecord signedPreKeyRecord = generateSignedPreKey(identityKeyPair);
 421
 422         accountManager.setPreKeys(getIdentity(), signedPreKeyRecord, oneTimePreKeys);
 423     }
 424
 425     private SignalServiceMessageReceiver getMessageReceiver() {
 426         return new SignalServiceMessageReceiver(BaseConfig.serviceConfiguration, null, username, account.getPassword(), account.getDeviceId(), account.getSignalingKey(), BaseConfig.USER_AGENT, null, timer);
 427     }
 428
 429     private SignalServiceMessageSender getMessageSender() {
 430         return new SignalServiceMessageSender(BaseConfig.serviceConfiguration, null, username, account.getPassword(),
 431                 account.getDeviceId(), account.getSignalProtocolStore(), BaseConfig.USER_AGENT, account.isMultiDevice(), Optional.fromNullable(messagePipe), Optional.fromNullable(unidentifiedMessagePipe), Optional.<SignalServiceMessageSender.EventListener>absent());
 432     }
 433
 434     private Optional<SignalServiceAttachmentStream> createGroupAvatarAttachment(byte[] groupId) throws IOException {
 435         File file = getGroupAvatarFile(groupId);
 436         if (!file.exists()) {
 437             return Optional.absent();
 438         }
 439
 440         return Optional.of(Utils.createAttachment(file));
 441     }
 442
 443     private Optional<SignalServiceAttachmentStream> createContactAvatarAttachment(String number) throws IOException {
 444         File file = getContactAvatarFile(number);
 445         if (!file.exists()) {
 446             return Optional.absent();
 447         }
 448
 449         return Optional.of(Utils.createAttachment(file));
 450     }
 451
 452     private GroupInfo getGroupForSending(byte[] groupId) throws GroupNotFoundException, NotAGroupMemberException {
 453         GroupInfo g = account.getGroupStore().getGroup(groupId);
 454         if (g == null) {
 455             throw new GroupNotFoundException(groupId);
 456         }
 457         for (String member : g.members) {
 458             if (member.equals(this.username)) {
 459                 return g;
 460             }
 461         }
 462         throw new NotAGroupMemberException(groupId, g.name);
 463     }
 464
 465     public List<GroupInfo> getGroups() {
 466         return account.getGroupStore().getGroups();
 467     }
 468
 469     @Override
 470     public void sendGroupMessage(String messageText, List<String> attachments,
 471                                  byte[] groupId)
 472             throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 473         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 474         if (attachments != null) {
 475             messageBuilder.withAttachments(Utils.getSignalServiceAttachments(attachments));
 476         }
 477         if (groupId != null) {
 478             SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.DELIVER)
 479                     .withId(groupId)
 480                     .build();
 481             messageBuilder.asGroupMessage(group);
 482         }
 483         ThreadInfo thread = account.getThreadStore().getThread(Base64.encodeBytes(groupId));
 484         if (thread != null) {
 485             messageBuilder.withExpiration(thread.messageExpirationTime);
 486         }
 487
 488         final GroupInfo g = getGroupForSending(groupId);
 489
 490         // Don't send group message to ourself
 491         final List<String> membersSend = new ArrayList<>(g.members);
 492         membersSend.remove(this.username);
 493         sendMessageLegacy(messageBuilder, membersSend);
 494     }
 495
 496     public void sendQuitGroupMessage(byte[] groupId) throws GroupNotFoundException, IOException, EncapsulatedExceptions {
 497         SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
 498                 .withId(groupId)
 499                 .build();
 500
 501         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 502                 .asGroupMessage(group);
 503
 504         final GroupInfo g = getGroupForSending(groupId);
 505         g.members.remove(this.username);
 506         account.getGroupStore().updateGroup(g);
 507
 508         sendMessageLegacy(messageBuilder, g.members);
 509     }
 510
 511     private byte[] sendUpdateGroupMessage(byte[] groupId, String name, Collection<String> members, String avatarFile) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 512         GroupInfo g;
 513         if (groupId == null) {
 514             // Create new group
 515             g = new GroupInfo(KeyUtils.createGroupId());
 516             g.members.add(username);
 517         } else {
 518             g = getGroupForSending(groupId);
 519         }
 520
 521         if (name != null) {
 522             g.name = name;
 523         }
 524
 525         if (members != null) {
 526             Set<String> newMembers = new HashSet<>();
 527             for (String member : members) {
 528                 try {
 529                     member = Utils.canonicalizeNumber(member, username);
 530                 } catch (InvalidNumberException e) {
 531                     System.err.println("Failed to add member \"" + member + "\" to group: " + e.getMessage());
 532                     System.err.println("Aborting…");
 533                     System.exit(1);
 534                 }
 535                 if (g.members.contains(member)) {
 536                     continue;
 537                 }
 538                 newMembers.add(member);
 539                 g.members.add(member);
 540             }
 541             final List<ContactTokenDetails> contacts = accountManager.getContacts(newMembers);
 542             if (contacts.size() != newMembers.size()) {
 543                 // Some of the new members are not registered on Signal
 544                 for (ContactTokenDetails contact : contacts) {
 545                     newMembers.remove(contact.getNumber());
 546                 }
 547                 System.err.println("Failed to add members " + Util.join(", ", newMembers) + " to group: Not registered on Signal");
 548                 System.err.println("Aborting…");
 549                 System.exit(1);
 550             }
 551         }
 552
 553         if (avatarFile != null) {
 554             IOUtils.createPrivateDirectories(avatarsPath);
 555             File aFile = getGroupAvatarFile(g.groupId);
 556             Files.copy(Paths.get(avatarFile), aFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
 557         }
 558
 559         account.getGroupStore().updateGroup(g);
 560
 561         SignalServiceDataMessage.Builder messageBuilder = getGroupUpdateMessageBuilder(g);
 562
 563         // Don't send group message to ourself
 564         final List<String> membersSend = new ArrayList<>(g.members);
 565         membersSend.remove(this.username);
 566         sendMessageLegacy(messageBuilder, membersSend);
 567         return g.groupId;
 568     }
 569
 570     private void sendUpdateGroupMessage(byte[] groupId, String recipient) throws IOException, EncapsulatedExceptions {
 571         if (groupId == null) {
 572             return;
 573         }
 574         GroupInfo g = getGroupForSending(groupId);
 575
 576         if (!g.members.contains(recipient)) {
 577             return;
 578         }
 579
 580         SignalServiceDataMessage.Builder messageBuilder = getGroupUpdateMessageBuilder(g);
 581
 582         // Send group message only to the recipient who requested it
 583         final List<String> membersSend = new ArrayList<>();
 584         membersSend.add(recipient);
 585         sendMessageLegacy(messageBuilder, membersSend);
 586     }
 587
 588     private SignalServiceDataMessage.Builder getGroupUpdateMessageBuilder(GroupInfo g) {
 589         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.UPDATE)
 590                 .withId(g.groupId)
 591                 .withName(g.name)
 592                 .withMembers(new ArrayList<>(g.getMembers()));
 593
 594         File aFile = getGroupAvatarFile(g.groupId);
 595         if (aFile.exists()) {
 596             try {
 597                 group.withAvatar(Utils.createAttachment(aFile));
 598             } catch (IOException e) {
 599                 throw new AttachmentInvalidException(aFile.toString(), e);
 600             }
 601         }
 602
 603         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 604                 .asGroupMessage(group.build());
 605
 606         ThreadInfo thread = account.getThreadStore().getThread(Base64.encodeBytes(g.groupId));
 607         if (thread != null) {
 608             messageBuilder.withExpiration(thread.messageExpirationTime);
 609         }
 610
 611         return messageBuilder;
 612     }
 613
 614     private void sendGroupInfoRequest(byte[] groupId, String recipient) throws IOException, EncapsulatedExceptions {
 615         if (groupId == null) {
 616             return;
 617         }
 618
 619         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.REQUEST_INFO)
 620                 .withId(groupId);
 621
 622         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 623                 .asGroupMessage(group.build());
 624
 625         ThreadInfo thread = account.getThreadStore().getThread(Base64.encodeBytes(groupId));
 626         if (thread != null) {
 627             messageBuilder.withExpiration(thread.messageExpirationTime);
 628         }
 629
 630         // Send group info request message to the recipient who sent us a message with this groupId
 631         final List<String> membersSend = new ArrayList<>();
 632         membersSend.add(recipient);
 633         sendMessageLegacy(messageBuilder, membersSend);
 634     }
 635
 636     @Override
 637     public void sendMessage(String message, List<String> attachments, String recipient)
 638             throws EncapsulatedExceptions, AttachmentInvalidException, IOException {
 639         List<String> recipients = new ArrayList<>(1);
 640         recipients.add(recipient);
 641         sendMessage(message, attachments, recipients);
 642     }
 643
 644     @Override
 645     public void sendMessage(String messageText, List<String> attachments,
 646                             List<String> recipients)
 647             throws IOException, EncapsulatedExceptions, AttachmentInvalidException {
 648         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 649         if (attachments != null) {
 650             List<SignalServiceAttachment> attachmentStreams = Utils.getSignalServiceAttachments(attachments);
 651
 652             // Upload attachments here, so we only upload once even for multiple recipients
 653             SignalServiceMessageSender messageSender = getMessageSender();
 654             List<SignalServiceAttachment> attachmentPointers = new ArrayList<>(attachmentStreams.size());
 655             for (SignalServiceAttachment attachment : attachmentStreams) {
 656                 if (attachment.isStream()) {
 657                     attachmentPointers.add(messageSender.uploadAttachment(attachment.asStream()));
 658                 } else if (attachment.isPointer()) {
 659                     attachmentPointers.add(attachment.asPointer());
 660                 }
 661             }
 662
 663             messageBuilder.withAttachments(attachmentPointers);
 664         }
 665         messageBuilder.withProfileKey(account.getProfileKey());
 666         sendMessageLegacy(messageBuilder, recipients);
 667     }
 668
 669     @Override
 670     public void sendEndSessionMessage(List<String> recipients) throws IOException, EncapsulatedExceptions {
 671         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 672                 .asEndSessionMessage();
 673
 674         sendMessageLegacy(messageBuilder, recipients);
 675     }
 676
 677     @Override
 678     public String getContactName(String number) throws InvalidNumberException {
 679         String canonicalizedNumber = Utils.canonicalizeNumber(number, username);
 680         ContactInfo contact = account.getContactStore().getContact(canonicalizedNumber);
 681         if (contact == null) {
 682             return "";
 683         } else {
 684             return contact.name;
 685         }
 686     }
 687
 688     @Override
 689     public void setContactName(String number, String name) throws InvalidNumberException {
 690         String canonicalizedNumber = Utils.canonicalizeNumber(number, username);
 691         ContactInfo contact = account.getContactStore().getContact(canonicalizedNumber);
 692         if (contact == null) {
 693             contact = new ContactInfo();
 694             contact.number = canonicalizedNumber;
 695             System.err.println("Add contact " + canonicalizedNumber + " named " + name);
 696         } else {
 697             System.err.println("Updating contact " + canonicalizedNumber + " name " + contact.name + " -> " + name);
 698         }
 699         contact.name = name;
 700         account.getContactStore().updateContact(contact);
 701         account.save();
 702     }
 703
 704     @Override
 705     public List<byte[]> getGroupIds() {
 706         List<GroupInfo> groups = getGroups();
 707         List<byte[]> ids = new ArrayList<>(groups.size());
 708         for (GroupInfo group : groups) {
 709             ids.add(group.groupId);
 710         }
 711         return ids;
 712     }
 713
 714     @Override
 715     public String getGroupName(byte[] groupId) {
 716         GroupInfo group = getGroup(groupId);
 717         if (group == null) {
 718             return "";
 719         } else {
 720             return group.name;
 721         }
 722     }
 723
 724     @Override
 725     public List<String> getGroupMembers(byte[] groupId) {
 726         GroupInfo group = getGroup(groupId);
 727         if (group == null) {
 728             return new ArrayList<>();
 729         } else {
 730             return new ArrayList<>(group.members);
 731         }
 732     }
 733
 734     @Override
 735     public byte[] updateGroup(byte[] groupId, String name, List<String> members, String avatar) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 736         if (groupId.length == 0) {
 737             groupId = null;
 738         }
 739         if (name.isEmpty()) {
 740             name = null;
 741         }
 742         if (members.size() == 0) {
 743             members = null;
 744         }
 745         if (avatar.isEmpty()) {
 746             avatar = null;
 747         }
 748         return sendUpdateGroupMessage(groupId, name, members, avatar);
 749     }
 750
 751     /**
 752      * Change the expiration timer for a thread (number of groupId)
 753      *
 754      * @param numberOrGroupId
 755      * @param messageExpirationTimer
 756      */
 757     public void setExpirationTimer(String numberOrGroupId, int messageExpirationTimer) {
 758         ThreadInfo thread = account.getThreadStore().getThread(numberOrGroupId);
 759         thread.messageExpirationTime = messageExpirationTimer;
 760         account.getThreadStore().updateThread(thread);
 761     }
 762
 763     private void requestSyncGroups() throws IOException {
 764         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.GROUPS).build();
 765         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 766         try {
 767             sendSyncMessage(message);
 768         } catch (UntrustedIdentityException e) {
 769             e.printStackTrace();
 770         }
 771     }
 772
 773     private void requestSyncContacts() throws IOException {
 774         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONTACTS).build();
 775         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 776         try {
 777             sendSyncMessage(message);
 778         } catch (UntrustedIdentityException e) {
 779             e.printStackTrace();
 780         }
 781     }
 782
 783     private void requestSyncBlocked() throws IOException {
 784         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.BLOCKED).build();
 785         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 786         try {
 787             sendSyncMessage(message);
 788         } catch (UntrustedIdentityException e) {
 789             e.printStackTrace();
 790         }
 791     }
 792
 793     private void requestSyncConfiguration() throws IOException {
 794         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONFIGURATION).build();
 795         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 796         try {
 797             sendSyncMessage(message);
 798         } catch (UntrustedIdentityException e) {
 799             e.printStackTrace();
 800         }
 801     }
 802
 803     private byte[] getSelfUnidentifiedAccessKey() {
 804         return UnidentifiedAccess.deriveAccessKeyFrom(account.getProfileKey());
 805     }
 806
 807     private byte[] getTargetUnidentifiedAccessKey(SignalServiceAddress recipient) {
 808         // TODO implement
 809         return null;
 810     }
 811
 812     private Optional<UnidentifiedAccessPair> getAccessForSync() {
 813         // TODO implement
 814         return Optional.absent();
 815     }
 816
 817     private List<Optional<UnidentifiedAccessPair>> getAccessFor(Collection<SignalServiceAddress> recipients) {
 818         List<Optional<UnidentifiedAccessPair>> result = new ArrayList<>(recipients.size());
 819         for (SignalServiceAddress recipient : recipients) {
 820             result.add(Optional.<UnidentifiedAccessPair>absent());
 821         }
 822         return result;
 823     }
 824
 825     private Optional<UnidentifiedAccessPair> getAccessFor(SignalServiceAddress recipient) {
 826         // TODO implement
 827         return Optional.absent();
 828     }
 829
 830     private void sendSyncMessage(SignalServiceSyncMessage message)
 831             throws IOException, UntrustedIdentityException {
 832         SignalServiceMessageSender messageSender = getMessageSender();
 833         try {
 834             messageSender.sendMessage(message, getAccessForSync());
 835         } catch (UntrustedIdentityException e) {
 836             account.getSignalProtocolStore().saveIdentity(e.getIdentifier(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
 837             throw e;
 838         }
 839     }
 840
 841     /**
 842      * This method throws an EncapsulatedExceptions exception instead of returning a list of SendMessageResult.
 843      */
 844     private void sendMessageLegacy(SignalServiceDataMessage.Builder messageBuilder, Collection<String> recipients)
 845             throws EncapsulatedExceptions, IOException {
 846         List<SendMessageResult> results = sendMessage(messageBuilder, recipients);
 847
 848         List<UntrustedIdentityException> untrustedIdentities = new LinkedList<>();
 849         List<UnregisteredUserException> unregisteredUsers = new LinkedList<>();
 850         List<NetworkFailureException> networkExceptions = new LinkedList<>();
 851
 852         for (SendMessageResult result : results) {
 853             if (result.isUnregisteredFailure()) {
 854                 unregisteredUsers.add(new UnregisteredUserException(result.getAddress().getNumber().get(), null));
 855             } else if (result.isNetworkFailure()) {
 856                 networkExceptions.add(new NetworkFailureException(result.getAddress().getNumber().get(), null));
 857             } else if (result.getIdentityFailure() != null) {
 858                 untrustedIdentities.add(new UntrustedIdentityException("Untrusted", result.getAddress().getNumber().get(), result.getIdentityFailure().getIdentityKey()));
 859             }
 860         }
 861         if (!untrustedIdentities.isEmpty() || !unregisteredUsers.isEmpty() || !networkExceptions.isEmpty()) {
 862             throw new EncapsulatedExceptions(untrustedIdentities, unregisteredUsers, networkExceptions);
 863         }
 864     }
 865
 866     private List<SendMessageResult> sendMessage(SignalServiceDataMessage.Builder messageBuilder, Collection<String> recipients)
 867             throws IOException {
 868         Set<SignalServiceAddress> recipientsTS = Utils.getSignalServiceAddresses(recipients, username);
 869         if (recipientsTS == null) {
 870             account.save();
 871             return Collections.emptyList();
 872         }
 873
 874         SignalServiceDataMessage message = null;
 875         try {
 876             SignalServiceMessageSender messageSender = getMessageSender();
 877
 878             message = messageBuilder.build();
 879             if (message.getGroupInfo().isPresent()) {
 880                 try {
 881                     final boolean isRecipientUpdate = false;
 882                     List<SendMessageResult> result = messageSender.sendMessage(new ArrayList<>(recipientsTS), getAccessFor(recipientsTS), isRecipientUpdate, message);
 883                     for (SendMessageResult r : result) {
 884                         if (r.getIdentityFailure() != null) {
 885                             account.getSignalProtocolStore().saveIdentity(r.getAddress().getNumber().get(), r.getIdentityFailure().getIdentityKey(), TrustLevel.UNTRUSTED);
 886                         }
 887                     }
 888                     return result;
 889                 } catch (UntrustedIdentityException e) {
 890                     account.getSignalProtocolStore().saveIdentity(e.getIdentifier(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
 891                     return Collections.emptyList();
 892                 }
 893             } else if (recipientsTS.size() == 1 && recipientsTS.contains(getSelfAddress())) {
 894                 SignalServiceAddress recipient = getSelfAddress();
 895                 final Optional<UnidentifiedAccessPair> unidentifiedAccess = getAccessFor(recipient);
 896                 SentTranscriptMessage transcript = new SentTranscriptMessage(Optional.of(recipient),
 897                         message.getTimestamp(),
 898                         message,
 899                         message.getExpiresInSeconds(),
 900                         Collections.singletonMap(recipient, unidentifiedAccess.isPresent()),
 901                         false);
 902                 SignalServiceSyncMessage syncMessage = SignalServiceSyncMessage.forSentTranscript(transcript);
 903
 904                 List<SendMessageResult> results = new ArrayList<>(recipientsTS.size());
 905                 try {
 906                     messageSender.sendMessage(syncMessage, unidentifiedAccess);
 907                 } catch (UntrustedIdentityException e) {
 908                     account.getSignalProtocolStore().saveIdentity(e.getIdentifier(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
 909                     results.add(SendMessageResult.identityFailure(recipient, e.getIdentityKey()));
 910                 }
 911                 return results;
 912             } else {
 913                 // Send to all individually, so sync messages are sent correctly
 914                 List<SendMessageResult> results = new ArrayList<>(recipientsTS.size());
 915                 for (SignalServiceAddress address : recipientsTS) {
 916                     ThreadInfo thread = account.getThreadStore().getThread(address.getNumber().get());
 917                     if (thread != null) {
 918                         messageBuilder.withExpiration(thread.messageExpirationTime);
 919                     } else {
 920                         messageBuilder.withExpiration(0);
 921                     }
 922                     message = messageBuilder.build();
 923                     try {
 924                         SendMessageResult result = messageSender.sendMessage(address, getAccessFor(address), message);
 925                         results.add(result);
 926                     } catch (UntrustedIdentityException e) {
 927                         account.getSignalProtocolStore().saveIdentity(e.getIdentifier(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
 928                         results.add(SendMessageResult.identityFailure(address, e.getIdentityKey()));
 929                     }
 930                 }
 931                 return results;
 932             }
 933         } finally {
 934             if (message != null && message.isEndSession()) {
 935                 for (SignalServiceAddress recipient : recipientsTS) {
 936                     handleEndSession(recipient.getNumber().get());
 937                 }
 938             }
 939             account.save();
 940         }
 941     }
 942
 943     private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) throws InvalidMetadataMessageException, ProtocolInvalidMessageException, ProtocolDuplicateMessageException, ProtocolLegacyMessageException, ProtocolInvalidKeyIdException, InvalidMetadataVersionException, ProtocolInvalidVersionException, ProtocolNoSessionException, ProtocolInvalidKeyException, ProtocolUntrustedIdentityException, SelfSendException, UnsupportedDataMessageException {
 944         SignalServiceCipher cipher = new SignalServiceCipher(getSelfAddress(), account.getSignalProtocolStore(), Utils.getCertificateValidator());
 945         try {
 946             return cipher.decrypt(envelope);
 947         } catch (ProtocolUntrustedIdentityException e) {
 948             // TODO We don't get the new untrusted identity from ProtocolUntrustedIdentityException anymore ... we need to get it from somewhere else
 949 //            account.getSignalProtocolStore().saveIdentity(e.getSender(), e.getUntrustedIdentity(), TrustLevel.UNTRUSTED);
 950             throw e;
 951         }
 952     }
 953
 954     private void handleEndSession(String source) {
 955         account.getSignalProtocolStore().deleteAllSessions(source);
 956     }
 957
 958     private void handleSignalServiceDataMessage(SignalServiceDataMessage message, boolean isSync, String source, SignalServiceAddress destination, boolean ignoreAttachments) {
 959         String threadId;
 960         if (message.getGroupInfo().isPresent()) {
 961             SignalServiceGroup groupInfo = message.getGroupInfo().get();
 962             threadId = Base64.encodeBytes(groupInfo.getGroupId());
 963             GroupInfo group = account.getGroupStore().getGroup(groupInfo.getGroupId());
 964             switch (groupInfo.getType()) {
 965                 case UPDATE:
 966                     if (group == null) {
 967                         group = new GroupInfo(groupInfo.getGroupId());
 968                     }
 969
 970                     if (groupInfo.getAvatar().isPresent()) {
 971                         SignalServiceAttachment avatar = groupInfo.getAvatar().get();
 972                         if (avatar.isPointer()) {
 973                             try {
 974                                 retrieveGroupAvatarAttachment(avatar.asPointer(), group.groupId);
 975                             } catch (IOException | InvalidMessageException e) {
 976                                 System.err.println("Failed to retrieve group avatar (" + avatar.asPointer().getId() + "): " + e.getMessage());
 977                             }
 978                         }
 979                     }
 980
 981                     if (groupInfo.getName().isPresent()) {
 982                         group.name = groupInfo.getName().get();
 983                     }
 984
 985                     if (groupInfo.getMembers().isPresent()) {
 986                         group.addMembers(groupInfo.getMembers().get());
 987                     }
 988
 989                     account.getGroupStore().updateGroup(group);
 990                     break;
 991                 case DELIVER:
 992                     if (group == null) {
 993                         try {
 994                             sendGroupInfoRequest(groupInfo.getGroupId(), source);
 995                         } catch (IOException | EncapsulatedExceptions e) {
 996                             e.printStackTrace();
 997                         }
 998                     }
 999                     break;
1000                 case QUIT:
1001                     if (group == null) {
1002                         try {
1003                             sendGroupInfoRequest(groupInfo.getGroupId(), source);
1004                         } catch (IOException | EncapsulatedExceptions e) {
1005                             e.printStackTrace();
1006                         }
1007                     } else {
1008                         group.members.remove(source);
1009                         account.getGroupStore().updateGroup(group);
1010                     }
1011                     break;
1012                 case REQUEST_INFO:
1013                     if (group != null) {
1014                         try {
1015                             sendUpdateGroupMessage(groupInfo.getGroupId(), source);
1016                         } catch (IOException | EncapsulatedExceptions e) {
1017                             e.printStackTrace();
1018                         } catch (NotAGroupMemberException e) {
1019                             // We have left this group, so don't send a group update message
1020                         }
1021                     }
1022                     break;
1023             }
1024         } else {
1025             if (isSync) {
1026                 threadId = destination.getNumber().get();
1027             } else {
1028                 threadId = source;
1029             }
1030         }
1031         if (message.isEndSession()) {
1032             handleEndSession(isSync ? destination.getNumber().get() : source);
1033         }
1034         if (message.isExpirationUpdate() || message.getBody().isPresent()) {
1035             ThreadInfo thread = account.getThreadStore().getThread(threadId);
1036             if (thread == null) {
1037                 thread = new ThreadInfo();
1038                 thread.id = threadId;
1039             }
1040             if (thread.messageExpirationTime != message.getExpiresInSeconds()) {
1041                 thread.messageExpirationTime = message.getExpiresInSeconds();
1042                 account.getThreadStore().updateThread(thread);
1043             }
1044         }
1045         if (message.getAttachments().isPresent() && !ignoreAttachments) {
1046             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
1047                 if (attachment.isPointer()) {
1048                     try {
1049                         retrieveAttachment(attachment.asPointer());
1050                     } catch (IOException | InvalidMessageException e) {
1051                         System.err.println("Failed to retrieve attachment (" + attachment.asPointer().getId() + "): " + e.getMessage());
1052                     }
1053                 }
1054             }
1055         }
1056         if (message.getProfileKey().isPresent() && message.getProfileKey().get().length == 32) {
1057             if (source.equals(username)) {
1058                 this.account.setProfileKey(message.getProfileKey().get());
1059             }
1060             ContactInfo contact = account.getContactStore().getContact(source);
1061             if (contact == null) {
1062                 contact = new ContactInfo();
1063                 contact.number = source;
1064             }
1065             contact.profileKey = Base64.encodeBytes(message.getProfileKey().get());
1066         }
1067         if (message.getPreviews().isPresent()) {
1068             final List<SignalServiceDataMessage.Preview> previews = message.getPreviews().get();
1069             for (SignalServiceDataMessage.Preview preview : previews) {
1070                 if (preview.getImage().isPresent() && preview.getImage().get().isPointer()) {
1071                     SignalServiceAttachmentPointer attachment = preview.getImage().get().asPointer();
1072                     try {
1073                         retrieveAttachment(attachment);
1074                     } catch (IOException | InvalidMessageException e) {
1075                         System.err.println("Failed to retrieve attachment (" + attachment.getId() + "): " + e.getMessage());
1076                     }
1077                 }
1078             }
1079         }
1080     }
1081
1082     private void retryFailedReceivedMessages(ReceiveMessageHandler handler, boolean ignoreAttachments) {
1083         final File cachePath = new File(getMessageCachePath());
1084         if (!cachePath.exists()) {
1085             return;
1086         }
1087         for (final File dir : Objects.requireNonNull(cachePath.listFiles())) {
1088             if (!dir.isDirectory()) {
1089                 continue;
1090             }
1091
1092             for (final File fileEntry : Objects.requireNonNull(dir.listFiles())) {
1093                 if (!fileEntry.isFile()) {
1094                     continue;
1095                 }
1096                 SignalServiceEnvelope envelope;
1097                 try {
1098                     envelope = Utils.loadEnvelope(fileEntry);
1099                     if (envelope == null) {
1100                         continue;
1101                     }
1102                 } catch (IOException e) {
1103                     e.printStackTrace();
1104                     continue;
1105                 }
1106                 SignalServiceContent content = null;
1107                 if (!envelope.isReceipt()) {
1108                     try {
1109                         content = decryptMessage(envelope);
1110                     } catch (Exception e) {
1111                         continue;
1112                     }
1113                     handleMessage(envelope, content, ignoreAttachments);
1114                 }
1115                 account.save();
1116                 handler.handleMessage(envelope, content, null);
1117                 try {
1118                     Files.delete(fileEntry.toPath());
1119                 } catch (IOException e) {
1120                     System.err.println("Failed to delete cached message file “" + fileEntry + "”: " + e.getMessage());
1121                 }
1122             }
1123             // Try to delete directory if empty
1124             dir.delete();
1125         }
1126     }
1127
1128     public void receiveMessages(long timeout, TimeUnit unit, boolean returnOnTimeout, boolean ignoreAttachments, ReceiveMessageHandler handler) throws IOException {
1129         retryFailedReceivedMessages(handler, ignoreAttachments);
1130         final SignalServiceMessageReceiver messageReceiver = getMessageReceiver();
1131
1132         try {
1133             if (messagePipe == null) {
1134                 messagePipe = messageReceiver.createMessagePipe();
1135             }
1136
1137             while (true) {
1138                 SignalServiceEnvelope envelope;
1139                 SignalServiceContent content = null;
1140                 Exception exception = null;
1141                 final long now = new Date().getTime();
1142                 try {
1143                     envelope = messagePipe.read(timeout, unit, new SignalServiceMessagePipe.MessagePipeCallback() {
1144                         @Override
1145                         public void onMessage(SignalServiceEnvelope envelope) {
1146                             // store message on disk, before acknowledging receipt to the server
1147                             try {
1148                                 File cacheFile = getMessageCacheFile(envelope.getSourceE164().get(), now, envelope.getTimestamp());
1149                                 Utils.storeEnvelope(envelope, cacheFile);
1150                             } catch (IOException e) {
1151                                 System.err.println("Failed to store encrypted message in disk cache, ignoring: " + e.getMessage());
1152                             }
1153                         }
1154                     });
1155                 } catch (TimeoutException e) {
1156                     if (returnOnTimeout)
1157                         return;
1158                     continue;
1159                 } catch (InvalidVersionException e) {
1160                     System.err.println("Ignoring error: " + e.getMessage());
1161                     continue;
1162                 }
1163                 if (!envelope.isReceipt()) {
1164                     try {
1165                         content = decryptMessage(envelope);
1166                     } catch (Exception e) {
1167                         exception = e;
1168                     }
1169                     handleMessage(envelope, content, ignoreAttachments);
1170                 }
1171                 account.save();
1172                 handler.handleMessage(envelope, content, exception);
1173                 if (!(exception instanceof ProtocolUntrustedIdentityException)) {
1174                     File cacheFile = null;
1175                     try {
1176                         cacheFile = getMessageCacheFile(envelope.getSourceE164().get(), now, envelope.getTimestamp());
1177                         Files.delete(cacheFile.toPath());
1178                         // Try to delete directory if empty
1179                         new File(getMessageCachePath()).delete();
1180                     } catch (IOException e) {
1181                         System.err.println("Failed to delete cached message file “" + cacheFile + "”: " + e.getMessage());
1182                     }
1183                 }
1184             }
1185         } finally {
1186             if (messagePipe != null) {
1187                 messagePipe.shutdown();
1188                 messagePipe = null;
1189             }
1190         }
1191     }
1192
1193     private void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, boolean ignoreAttachments) {
1194         if (content != null) {
1195             SignalServiceAddress sender;
1196             if (!envelope.isUnidentifiedSender() && envelope.hasSource()) {
1197                 sender = envelope.getSourceAddress();
1198             } else {
1199                 sender = content.getSender();
1200             }
1201             if (content.getDataMessage().isPresent()) {
1202                 SignalServiceDataMessage message = content.getDataMessage().get();
1203                 handleSignalServiceDataMessage(message, false, sender.getNumber().get(), getSelfAddress(), ignoreAttachments);
1204             }
1205             if (content.getSyncMessage().isPresent()) {
1206                 account.setMultiDevice(true);
1207                 SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
1208                 if (syncMessage.getSent().isPresent()) {
1209                     SentTranscriptMessage message = syncMessage.getSent().get();
1210                     handleSignalServiceDataMessage(message.getMessage(), true, sender.getNumber().get(), message.getDestination().orNull(), ignoreAttachments);
1211                 }
1212                 if (syncMessage.getRequest().isPresent()) {
1213                     RequestMessage rm = syncMessage.getRequest().get();
1214                     if (rm.isContactsRequest()) {
1215                         try {
1216                             sendContacts();
1217                         } catch (UntrustedIdentityException | IOException e) {
1218                             e.printStackTrace();
1219                         }
1220                     }
1221                     if (rm.isGroupsRequest()) {
1222                         try {
1223                             sendGroups();
1224                         } catch (UntrustedIdentityException | IOException e) {
1225                             e.printStackTrace();
1226                         }
1227                     }
1228                     // TODO Handle rm.isBlockedListRequest(); rm.isConfigurationRequest();
1229                 }
1230                 if (syncMessage.getGroups().isPresent()) {
1231                     File tmpFile = null;
1232                     try {
1233                         tmpFile = IOUtils.createTempFile();
1234                         try (InputStream attachmentAsStream = retrieveAttachmentAsStream(syncMessage.getGroups().get().asPointer(), tmpFile)) {
1235                             DeviceGroupsInputStream s = new DeviceGroupsInputStream(attachmentAsStream);
1236                             DeviceGroup g;
1237                             while ((g = s.read()) != null) {
1238                                 GroupInfo syncGroup = account.getGroupStore().getGroup(g.getId());
1239                                 if (syncGroup == null) {
1240                                     syncGroup = new GroupInfo(g.getId());
1241                                 }
1242                                 if (g.getName().isPresent()) {
1243                                     syncGroup.name = g.getName().get();
1244                                 }
1245                                 syncGroup.addMembers(g.getMembers());
1246                                 syncGroup.active = g.isActive();
1247                                 if (g.getColor().isPresent()) {
1248                                     syncGroup.color = g.getColor().get();
1249                                 }
1250
1251                                 if (g.getAvatar().isPresent()) {
1252                                     retrieveGroupAvatarAttachment(g.getAvatar().get(), syncGroup.groupId);
1253                                 }
1254                                 account.getGroupStore().updateGroup(syncGroup);
1255                             }
1256                         }
1257                     } catch (Exception e) {
1258                         e.printStackTrace();
1259                     } finally {
1260                         if (tmpFile != null) {
1261                             try {
1262                                 Files.delete(tmpFile.toPath());
1263                             } catch (IOException e) {
1264                                 System.err.println("Failed to delete received groups temp file “" + tmpFile + "”: " + e.getMessage());
1265                             }
1266                         }
1267                     }
1268                 }
1269                 if (syncMessage.getBlockedList().isPresent()) {
1270                     // TODO store list of blocked numbers
1271                 }
1272                 if (syncMessage.getContacts().isPresent()) {
1273                     File tmpFile = null;
1274                     try {
1275                         tmpFile = IOUtils.createTempFile();
1276                         final ContactsMessage contactsMessage = syncMessage.getContacts().get();
1277                         try (InputStream attachmentAsStream = retrieveAttachmentAsStream(contactsMessage.getContactsStream().asPointer(), tmpFile)) {
1278                             DeviceContactsInputStream s = new DeviceContactsInputStream(attachmentAsStream);
1279                             if (contactsMessage.isComplete()) {
1280                                 account.getContactStore().clear();
1281                             }
1282                             DeviceContact c;
1283                             while ((c = s.read()) != null) {
1284                                 if (c.getAddress().matches(account.getSelfAddress()) && c.getProfileKey().isPresent()) {
1285                                     account.setProfileKey(c.getProfileKey().get());
1286                                 }
1287                                 ContactInfo contact = account.getContactStore().getContact(c.getAddress().getNumber().get());
1288                                 if (contact == null) {
1289                                     contact = new ContactInfo();
1290                                     contact.number = c.getAddress().getNumber().get();
1291                                 }
1292                                 if (c.getName().isPresent()) {
1293                                     contact.name = c.getName().get();
1294                                 }
1295                                 if (c.getColor().isPresent()) {
1296                                     contact.color = c.getColor().get();
1297                                 }
1298                                 if (c.getProfileKey().isPresent()) {
1299                                     contact.profileKey = Base64.encodeBytes(c.getProfileKey().get());
1300                                 }
1301                                 if (c.getVerified().isPresent()) {
1302                                     final VerifiedMessage verifiedMessage = c.getVerified().get();
1303                                     account.getSignalProtocolStore().saveIdentity(verifiedMessage.getDestination().getNumber().get(), verifiedMessage.getIdentityKey(), TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
1304                                 }
1305                                 if (c.getExpirationTimer().isPresent()) {
1306                                     ThreadInfo thread = account.getThreadStore().getThread(c.getAddress().getNumber().get());
1307                                     if (thread == null) {
1308                                         thread = new ThreadInfo();
1309                                         thread.id = c.getAddress().getNumber().get();
1310                                     }
1311                                     thread.messageExpirationTime = c.getExpirationTimer().get();
1312                                     account.getThreadStore().updateThread(thread);
1313                                 }
1314                                 if (c.isBlocked()) {
1315                                     // TODO store list of blocked numbers
1316                                 }
1317                                 account.getContactStore().updateContact(contact);
1318
1319                                 if (c.getAvatar().isPresent()) {
1320                                     retrieveContactAvatarAttachment(c.getAvatar().get(), contact.number);
1321                                 }
1322                             }
1323                         }
1324                     } catch (Exception e) {
1325                         e.printStackTrace();
1326                     } finally {
1327                         if (tmpFile != null) {
1328                             try {
1329                                 Files.delete(tmpFile.toPath());
1330                             } catch (IOException e) {
1331                                 System.err.println("Failed to delete received contacts temp file “" + tmpFile + "”: " + e.getMessage());
1332                             }
1333                         }
1334                     }
1335                 }
1336                 if (syncMessage.getVerified().isPresent()) {
1337                     final VerifiedMessage verifiedMessage = syncMessage.getVerified().get();
1338                     account.getSignalProtocolStore().saveIdentity(verifiedMessage.getDestination().getNumber().get(), verifiedMessage.getIdentityKey(), TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
1339                 }
1340                 if (syncMessage.getConfiguration().isPresent()) {
1341                     // TODO
1342                 }
1343             }
1344         }
1345     }
1346
1347     private File getContactAvatarFile(String number) {
1348         return new File(avatarsPath, "contact-" + number);
1349     }
1350
1351     private File retrieveContactAvatarAttachment(SignalServiceAttachment attachment, String number) throws IOException, InvalidMessageException {
1352         IOUtils.createPrivateDirectories(avatarsPath);
1353         if (attachment.isPointer()) {
1354             SignalServiceAttachmentPointer pointer = attachment.asPointer();
1355             return retrieveAttachment(pointer, getContactAvatarFile(number), false);
1356         } else {
1357             SignalServiceAttachmentStream stream = attachment.asStream();
1358             return Utils.retrieveAttachment(stream, getContactAvatarFile(number));
1359         }
1360     }
1361
1362     private File getGroupAvatarFile(byte[] groupId) {
1363         return new File(avatarsPath, "group-" + Base64.encodeBytes(groupId).replace("/", "_"));
1364     }
1365
1366     private File retrieveGroupAvatarAttachment(SignalServiceAttachment attachment, byte[] groupId) throws IOException, InvalidMessageException {
1367         IOUtils.createPrivateDirectories(avatarsPath);
1368         if (attachment.isPointer()) {
1369             SignalServiceAttachmentPointer pointer = attachment.asPointer();
1370             return retrieveAttachment(pointer, getGroupAvatarFile(groupId), false);
1371         } else {
1372             SignalServiceAttachmentStream stream = attachment.asStream();
1373             return Utils.retrieveAttachment(stream, getGroupAvatarFile(groupId));
1374         }
1375     }
1376
1377     public File getAttachmentFile(long attachmentId) {
1378         return new File(attachmentsPath, attachmentId + "");
1379     }
1380
1381     private File retrieveAttachment(SignalServiceAttachmentPointer pointer) throws IOException, InvalidMessageException {
1382         IOUtils.createPrivateDirectories(attachmentsPath);
1383         return retrieveAttachment(pointer, getAttachmentFile(pointer.getId()), true);
1384     }
1385
1386     private File retrieveAttachment(SignalServiceAttachmentPointer pointer, File outputFile, boolean storePreview) throws IOException, InvalidMessageException {
1387         if (storePreview && pointer.getPreview().isPresent()) {
1388             File previewFile = new File(outputFile + ".preview");
1389             try (OutputStream output = new FileOutputStream(previewFile)) {
1390                 byte[] preview = pointer.getPreview().get();
1391                 output.write(preview, 0, preview.length);
1392             } catch (FileNotFoundException e) {
1393                 e.printStackTrace();
1394                 return null;
1395             }
1396         }
1397
1398         final SignalServiceMessageReceiver messageReceiver = getMessageReceiver();
1399
1400         File tmpFile = IOUtils.createTempFile();
1401         try (InputStream input = messageReceiver.retrieveAttachment(pointer, tmpFile, BaseConfig.MAX_ATTACHMENT_SIZE)) {
1402             try (OutputStream output = new FileOutputStream(outputFile)) {
1403                 byte[] buffer = new byte[4096];
1404                 int read;
1405
1406                 while ((read = input.read(buffer)) != -1) {
1407                     output.write(buffer, 0, read);
1408                 }
1409             } catch (FileNotFoundException e) {
1410                 e.printStackTrace();
1411                 return null;
1412             }
1413         } finally {
1414             try {
1415                 Files.delete(tmpFile.toPath());
1416             } catch (IOException e) {
1417                 System.err.println("Failed to delete received attachment temp file “" + tmpFile + "”: " + e.getMessage());
1418             }
1419         }
1420         return outputFile;
1421     }
1422
1423     private InputStream retrieveAttachmentAsStream(SignalServiceAttachmentPointer pointer, File tmpFile) throws IOException, InvalidMessageException {
1424         final SignalServiceMessageReceiver messageReceiver = getMessageReceiver();
1425         return messageReceiver.retrieveAttachment(pointer, tmpFile, BaseConfig.MAX_ATTACHMENT_SIZE);
1426     }
1427
1428     @Override
1429     public boolean isRemote() {
1430         return false;
1431     }
1432
1433     private void sendGroups() throws IOException, UntrustedIdentityException {
1434         File groupsFile = IOUtils.createTempFile();
1435
1436         try {
1437             try (OutputStream fos = new FileOutputStream(groupsFile)) {
1438                 DeviceGroupsOutputStream out = new DeviceGroupsOutputStream(fos);
1439                 for (GroupInfo record : account.getGroupStore().getGroups()) {
1440                     ThreadInfo info = account.getThreadStore().getThread(Base64.encodeBytes(record.groupId));
1441                     out.write(new DeviceGroup(record.groupId, Optional.fromNullable(record.name),
1442                             new ArrayList<>(record.getMembers()), createGroupAvatarAttachment(record.groupId),
1443                             record.active, Optional.fromNullable(info != null ? info.messageExpirationTime : null),
1444                             Optional.fromNullable(record.color), false));
1445                 }
1446             }
1447
1448             if (groupsFile.exists() && groupsFile.length() > 0) {
1449                 try (FileInputStream groupsFileStream = new FileInputStream(groupsFile)) {
1450                     SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
1451                             .withStream(groupsFileStream)
1452                             .withContentType("application/octet-stream")
1453                             .withLength(groupsFile.length())
1454                             .build();
1455
1456                     sendSyncMessage(SignalServiceSyncMessage.forGroups(attachmentStream));
1457                 }
1458             }
1459         } finally {
1460             try {
1461                 Files.delete(groupsFile.toPath());
1462             } catch (IOException e) {
1463                 System.err.println("Failed to delete groups temp file “" + groupsFile + "”: " + e.getMessage());
1464             }
1465         }
1466     }
1467
1468     public void sendContacts() throws IOException, UntrustedIdentityException {
1469         File contactsFile = IOUtils.createTempFile();
1470
1471         try {
1472             try (OutputStream fos = new FileOutputStream(contactsFile)) {
1473                 DeviceContactsOutputStream out = new DeviceContactsOutputStream(fos);
1474                 for (ContactInfo record : account.getContactStore().getContacts()) {
1475                     VerifiedMessage verifiedMessage = null;
1476                     ThreadInfo info = account.getThreadStore().getThread(record.number);
1477                     if (getIdentities().containsKey(record.number)) {
1478                         JsonIdentityKeyStore.Identity currentIdentity = null;
1479                         for (JsonIdentityKeyStore.Identity id : getIdentities().get(record.number)) {
1480                             if (currentIdentity == null || id.getDateAdded().after(currentIdentity.getDateAdded())) {
1481                                 currentIdentity = id;
1482                             }
1483                         }
1484                         if (currentIdentity != null) {
1485                             verifiedMessage = new VerifiedMessage(record.getAddress(), currentIdentity.getIdentityKey(), currentIdentity.getTrustLevel().toVerifiedState(), currentIdentity.getDateAdded().getTime());
1486                         }
1487                     }
1488
1489                     byte[] profileKey = record.profileKey == null ? null : Base64.decode(record.profileKey);
1490                     // TODO store list of blocked numbers
1491                     boolean blocked = false;
1492                     out.write(new DeviceContact(record.getAddress(), Optional.fromNullable(record.name),
1493                             createContactAvatarAttachment(record.number), Optional.fromNullable(record.color),
1494                             Optional.fromNullable(verifiedMessage), Optional.fromNullable(profileKey), blocked, Optional.fromNullable(info != null ? info.messageExpirationTime : null)));
1495                 }
1496
1497                 if (account.getProfileKey() != null) {
1498                     // Send our own profile key as well
1499                     out.write(new DeviceContact(account.getSelfAddress(),
1500                             Optional.<String>absent(), Optional.<SignalServiceAttachmentStream>absent(),
1501                             Optional.<String>absent(), Optional.<VerifiedMessage>absent(),
1502                             Optional.of(account.getProfileKey()),
1503                             false, Optional.<Integer>absent()));
1504                 }
1505             }
1506
1507             if (contactsFile.exists() && contactsFile.length() > 0) {
1508                 try (FileInputStream contactsFileStream = new FileInputStream(contactsFile)) {
1509                     SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
1510                             .withStream(contactsFileStream)
1511                             .withContentType("application/octet-stream")
1512                             .withLength(contactsFile.length())
1513                             .build();
1514
1515                     sendSyncMessage(SignalServiceSyncMessage.forContacts(new ContactsMessage(attachmentStream, true)));
1516                 }
1517             }
1518         } finally {
1519             try {
1520                 Files.delete(contactsFile.toPath());
1521             } catch (IOException e) {
1522                 System.err.println("Failed to delete contacts temp file “" + contactsFile + "”: " + e.getMessage());
1523             }
1524         }
1525     }
1526
1527     private void sendVerifiedMessage(SignalServiceAddress destination, IdentityKey identityKey, TrustLevel trustLevel) throws IOException, UntrustedIdentityException {
1528         VerifiedMessage verifiedMessage = new VerifiedMessage(destination, identityKey, trustLevel.toVerifiedState(), System.currentTimeMillis());
1529         sendSyncMessage(SignalServiceSyncMessage.forVerified(verifiedMessage));
1530     }
1531
1532     public List<ContactInfo> getContacts() {
1533         return account.getContactStore().getContacts();
1534     }
1535
1536     public ContactInfo getContact(String number) {
1537         return account.getContactStore().getContact(number);
1538     }
1539
1540     public GroupInfo getGroup(byte[] groupId) {
1541         return account.getGroupStore().getGroup(groupId);
1542     }
1543
1544     public Map<String, List<JsonIdentityKeyStore.Identity>> getIdentities() {
1545         return account.getSignalProtocolStore().getIdentities();
1546     }
1547
1548     public List<JsonIdentityKeyStore.Identity> getIdentities(String number) {
1549         return account.getSignalProtocolStore().getIdentities(number);
1550     }
1551
1552     /**
1553      * Trust this the identity with this fingerprint
1554      *
1555      * @param name        username of the identity
1556      * @param fingerprint Fingerprint
1557      */
1558     public boolean trustIdentityVerified(String name, byte[] fingerprint) {
1559         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(name);
1560         if (ids == null) {
1561             return false;
1562         }
1563         for (JsonIdentityKeyStore.Identity id : ids) {
1564             if (!Arrays.equals(id.getIdentityKey().serialize(), fingerprint)) {
1565                 continue;
1566             }
1567
1568             account.getSignalProtocolStore().saveIdentity(name, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1569             try {
1570                 sendVerifiedMessage(new SignalServiceAddress(null, name), id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1571             } catch (IOException | UntrustedIdentityException e) {
1572                 e.printStackTrace();
1573             }
1574             account.save();
1575             return true;
1576         }
1577         return false;
1578     }
1579
1580     /**
1581      * Trust this the identity with this safety number
1582      *
1583      * @param name         username of the identity
1584      * @param safetyNumber Safety number
1585      */
1586     public boolean trustIdentityVerifiedSafetyNumber(String name, String safetyNumber) {
1587         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(name);
1588         if (ids == null) {
1589             return false;
1590         }
1591         for (JsonIdentityKeyStore.Identity id : ids) {
1592             if (!safetyNumber.equals(computeSafetyNumber(name, id.getIdentityKey()))) {
1593                 continue;
1594             }
1595
1596             account.getSignalProtocolStore().saveIdentity(name, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1597             try {
1598                 sendVerifiedMessage(new SignalServiceAddress(null, name), id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1599             } catch (IOException | UntrustedIdentityException e) {
1600                 e.printStackTrace();
1601             }
1602             account.save();
1603             return true;
1604         }
1605         return false;
1606     }
1607
1608     /**
1609      * Trust all keys of this identity without verification
1610      *
1611      * @param name username of the identity
1612      */
1613     public boolean trustIdentityAllKeys(String name) {
1614         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(name);
1615         if (ids == null) {
1616             return false;
1617         }
1618         for (JsonIdentityKeyStore.Identity id : ids) {
1619             if (id.getTrustLevel() == TrustLevel.UNTRUSTED) {
1620                 account.getSignalProtocolStore().saveIdentity(name, id.getIdentityKey(), TrustLevel.TRUSTED_UNVERIFIED);
1621                 try {
1622                     sendVerifiedMessage(new SignalServiceAddress(null, name), id.getIdentityKey(), TrustLevel.TRUSTED_UNVERIFIED);
1623                 } catch (IOException | UntrustedIdentityException e) {
1624                     e.printStackTrace();
1625                 }
1626             }
1627         }
1628         account.save();
1629         return true;
1630     }
1631
1632     public String computeSafetyNumber(String theirUsername, IdentityKey theirIdentityKey) {
1633         return Utils.computeSafetyNumber(username, getIdentity(), theirUsername, theirIdentityKey);
1634     }
1635
1636     public interface ReceiveMessageHandler {
1637
1638         void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent decryptedContent, Throwable e);
1639     }
1640 }