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

   1 /*
   2   Copyright (C) 2015-2018 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.manager;
  18
  19 import org.asamk.Signal;
  20 import org.asamk.signal.*;
  21 import org.asamk.signal.storage.SignalAccount;
  22 import org.asamk.signal.storage.contacts.ContactInfo;
  23 import org.asamk.signal.storage.groups.GroupInfo;
  24 import org.asamk.signal.storage.groups.JsonGroupStore;
  25 import org.asamk.signal.storage.protocol.JsonIdentityKeyStore;
  26 import org.asamk.signal.storage.threads.ThreadInfo;
  27 import org.asamk.signal.util.IOUtils;
  28 import org.asamk.signal.util.Util;
  29 import org.signal.libsignal.metadata.*;
  30 import org.whispersystems.libsignal.*;
  31 import org.whispersystems.libsignal.ecc.Curve;
  32 import org.whispersystems.libsignal.ecc.ECKeyPair;
  33 import org.whispersystems.libsignal.ecc.ECPublicKey;
  34 import org.whispersystems.libsignal.state.PreKeyRecord;
  35 import org.whispersystems.libsignal.state.SignedPreKeyRecord;
  36 import org.whispersystems.libsignal.util.KeyHelper;
  37 import org.whispersystems.libsignal.util.Medium;
  38 import org.whispersystems.libsignal.util.guava.Optional;
  39 import org.whispersystems.signalservice.api.SignalServiceAccountManager;
  40 import org.whispersystems.signalservice.api.SignalServiceMessagePipe;
  41 import org.whispersystems.signalservice.api.SignalServiceMessageReceiver;
  42 import org.whispersystems.signalservice.api.SignalServiceMessageSender;
  43 import org.whispersystems.signalservice.api.crypto.SignalServiceCipher;
  44 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccess;
  45 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccessPair;
  46 import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
  47 import org.whispersystems.signalservice.api.messages.*;
  48 import org.whispersystems.signalservice.api.messages.multidevice.*;
  49 import org.whispersystems.signalservice.api.push.ContactTokenDetails;
  50 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
  51 import org.whispersystems.signalservice.api.push.exceptions.AuthorizationFailedException;
  52 import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
  53 import org.whispersystems.signalservice.api.push.exceptions.NetworkFailureException;
  54 import org.whispersystems.signalservice.api.push.exceptions.UnregisteredUserException;
  55 import org.whispersystems.signalservice.api.util.InvalidNumberException;
  56 import org.whispersystems.signalservice.api.util.SleepTimer;
  57 import org.whispersystems.signalservice.api.util.UptimeSleepTimer;
  58 import org.whispersystems.signalservice.internal.push.SignalServiceProtos;
  59 import org.whispersystems.signalservice.internal.push.UnsupportedDataMessageException;
  60 import org.whispersystems.signalservice.internal.util.Base64;
  61
  62 import java.io.*;
  63 import java.net.URI;
  64 import java.nio.file.Files;
  65 import java.nio.file.Paths;
  66 import java.nio.file.StandardCopyOption;
  67 import java.util.*;
  68 import java.util.concurrent.TimeUnit;
  69 import java.util.concurrent.TimeoutException;
  70
  71 public class Manager implements Signal {
  72
  73     private final String settingsPath;
  74     private final String dataPath;
  75     private final String attachmentsPath;
  76     private final String avatarsPath;
  77     private final SleepTimer timer = new UptimeSleepTimer();
  78
  79     private SignalAccount account;
  80     private String username;
  81     private SignalServiceAccountManager accountManager;
  82     private SignalServiceMessagePipe messagePipe = null;
  83     private SignalServiceMessagePipe unidentifiedMessagePipe = null;
  84
  85     public Manager(String username, String settingsPath) {
  86         this.username = username;
  87         this.settingsPath = settingsPath;
  88         this.dataPath = this.settingsPath + "/data";
  89         this.attachmentsPath = this.settingsPath + "/attachments";
  90         this.avatarsPath = this.settingsPath + "/avatars";
  91
  92     }
  93
  94     public String getUsername() {
  95         return username;
  96     }
  97
  98     private IdentityKey getIdentity() {
  99         return account.getSignalProtocolStore().getIdentityKeyPair().getPublicKey();
 100     }
 101
 102     public int getDeviceId() {
 103         return account.getDeviceId();
 104     }
 105
 106     private String getMessageCachePath() {
 107         return this.dataPath + "/" + username + ".d/msg-cache";
 108     }
 109
 110     private String getMessageCachePath(String sender) {
 111         return getMessageCachePath() + "/" + sender.replace("/", "_");
 112     }
 113
 114     private File getMessageCacheFile(String sender, long now, long timestamp) throws IOException {
 115         String cachePath = getMessageCachePath(sender);
 116         IOUtils.createPrivateDirectories(cachePath);
 117         return new File(cachePath + "/" + now + "_" + timestamp);
 118     }
 119
 120     public boolean userHasKeys() {
 121         return account != null && account.getSignalProtocolStore() != null;
 122     }
 123
 124     public void init() throws IOException {
 125         if (!SignalAccount.userExists(dataPath, username)) {
 126             return;
 127         }
 128         account = SignalAccount.load(dataPath, username);
 129
 130         migrateLegacyConfigs();
 131
 132         accountManager = new SignalServiceAccountManager(BaseConfig.serviceConfiguration, username, account.getPassword(), account.getDeviceId(), BaseConfig.USER_AGENT, timer);
 133         try {
 134             if (account.isRegistered() && accountManager.getPreKeysCount() < BaseConfig.PREKEY_MINIMUM_COUNT) {
 135                 refreshPreKeys();
 136                 account.save();
 137             }
 138         } catch (AuthorizationFailedException e) {
 139             System.err.println("Authorization failed, was the number registered elsewhere?");
 140             throw e;
 141         }
 142     }
 143
 144     private void migrateLegacyConfigs() {
 145         // Copy group avatars that were previously stored in the attachments folder
 146         // to the new avatar folder
 147         if (JsonGroupStore.groupsWithLegacyAvatarId.size() > 0) {
 148             for (GroupInfo g : JsonGroupStore.groupsWithLegacyAvatarId) {
 149                 File avatarFile = getGroupAvatarFile(g.groupId);
 150                 File attachmentFile = getAttachmentFile(g.getAvatarId());
 151                 if (!avatarFile.exists() && attachmentFile.exists()) {
 152                     try {
 153                         IOUtils.createPrivateDirectories(avatarsPath);
 154                         Files.copy(attachmentFile.toPath(), avatarFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
 155                     } catch (Exception e) {
 156                         // Ignore
 157                     }
 158                 }
 159             }
 160             JsonGroupStore.groupsWithLegacyAvatarId.clear();
 161             account.save();
 162         }
 163         if (account.getProfileKey() == null) {
 164             // Old config file, creating new profile key
 165             account.setProfileKey(KeyUtils.createProfileKey());
 166             account.save();
 167         }
 168     }
 169
 170     private void createNewIdentity() throws IOException {
 171         IdentityKeyPair identityKey = KeyHelper.generateIdentityKeyPair();
 172         int registrationId = KeyHelper.generateRegistrationId(false);
 173         if (username == null) {
 174             account = SignalAccount.createTemporaryAccount(identityKey, registrationId);
 175         } else {
 176             byte[] profileKey = KeyUtils.createProfileKey();
 177             account = SignalAccount.create(dataPath, username, identityKey, registrationId, profileKey);
 178             account.save();
 179         }
 180     }
 181
 182     public boolean isRegistered() {
 183         return account != null && account.isRegistered();
 184     }
 185
 186     public void register(boolean voiceVerification) throws IOException {
 187         if (account == null) {
 188             createNewIdentity();
 189         }
 190         account.setPassword(KeyUtils.createPassword());
 191         accountManager = new SignalServiceAccountManager(BaseConfig.serviceConfiguration, account.getUsername(), account.getPassword(), BaseConfig.USER_AGENT, timer);
 192
 193         if (voiceVerification) {
 194             accountManager.requestVoiceVerificationCode(Locale.getDefault(), Optional.<String>absent(), Optional.<String>absent());
 195         } else {
 196             accountManager.requestSmsVerificationCode(false, Optional.<String>absent(), Optional.<String>absent());
 197         }
 198
 199         account.setRegistered(false);
 200         account.save();
 201     }
 202
 203     public void updateAccountAttributes() throws IOException {
 204         accountManager.setAccountAttributes(account.getSignalingKey(), account.getSignalProtocolStore().getLocalRegistrationId(), true, account.getRegistrationLockPin(), getSelfUnidentifiedAccessKey(), false);
 205     }
 206
 207     public void unregister() throws IOException {
 208         // When setting an empty GCM id, the Signal-Server also sets the fetchesMessages property to false.
 209         // If this is the master device, other users can't send messages to this number anymore.
 210         // If this is a linked device, other users can still send messages, but this device doesn't receive them anymore.
 211         accountManager.setGcmId(Optional.<String>absent());
 212
 213         account.setRegistered(false);
 214         account.save();
 215     }
 216
 217     public String getDeviceLinkUri() throws TimeoutException, IOException {
 218         if (account == null) {
 219             createNewIdentity();
 220         }
 221         account.setPassword(KeyUtils.createPassword());
 222         accountManager = new SignalServiceAccountManager(BaseConfig.serviceConfiguration, username, account.getPassword(), BaseConfig.USER_AGENT, timer);
 223         String uuid = accountManager.getNewDeviceUuid();
 224
 225         return Utils.createDeviceLinkUri(new Utils.DeviceLinkInfo(uuid, getIdentity().getPublicKey()));
 226     }
 227
 228     public void finishDeviceLink(String deviceName) throws IOException, InvalidKeyException, TimeoutException, UserAlreadyExists {
 229         account.setSignalingKey(KeyUtils.createSignalingKey());
 230         SignalServiceAccountManager.NewDeviceRegistrationReturn ret = accountManager.finishNewDeviceRegistration(account.getSignalProtocolStore().getIdentityKeyPair(), account.getSignalingKey(), false, true, account.getSignalProtocolStore().getLocalRegistrationId(), deviceName);
 231
 232         username = ret.getNumber();
 233         // TODO do this check before actually registering
 234         if (SignalAccount.userExists(dataPath, username)) {
 235             throw new UserAlreadyExists(username, SignalAccount.getFileName(dataPath, username));
 236         }
 237
 238         // Create new account with the synced identity
 239         byte[] profileKey = ret.getProfileKey();
 240         if (profileKey == null) {
 241             profileKey = KeyUtils.createProfileKey();
 242         }
 243         account = SignalAccount.createLinkedAccount(dataPath, username, account.getPassword(), ret.getDeviceId(), ret.getIdentity(), account.getSignalProtocolStore().getLocalRegistrationId(), account.getSignalingKey(), profileKey);
 244
 245         refreshPreKeys();
 246
 247         requestSyncGroups();
 248         requestSyncContacts();
 249         requestSyncBlocked();
 250         requestSyncConfiguration();
 251
 252         account.save();
 253     }
 254
 255     public List<DeviceInfo> getLinkedDevices() throws IOException {
 256         List<DeviceInfo> devices = accountManager.getDevices();
 257         account.setMultiDevice(devices.size() > 1);
 258         account.save();
 259         return devices;
 260     }
 261
 262     public void removeLinkedDevices(int deviceId) throws IOException {
 263         accountManager.removeDevice(deviceId);
 264         List<DeviceInfo> devices = accountManager.getDevices();
 265         account.setMultiDevice(devices.size() > 1);
 266         account.save();
 267     }
 268
 269     public void addDeviceLink(URI linkUri) throws IOException, InvalidKeyException {
 270         Utils.DeviceLinkInfo info = Utils.parseDeviceLinkUri(linkUri);
 271
 272         addDevice(info.deviceIdentifier, info.deviceKey);
 273     }
 274
 275     private void addDevice(String deviceIdentifier, ECPublicKey deviceKey) throws IOException, InvalidKeyException {
 276         IdentityKeyPair identityKeyPair = account.getSignalProtocolStore().getIdentityKeyPair();
 277         String verificationCode = accountManager.getNewDeviceVerificationCode();
 278
 279         accountManager.addDevice(deviceIdentifier, deviceKey, identityKeyPair, Optional.of(account.getProfileKey()), verificationCode);
 280         account.setMultiDevice(true);
 281         account.save();
 282     }
 283
 284     private List<PreKeyRecord> generatePreKeys() {
 285         List<PreKeyRecord> records = new ArrayList<>(BaseConfig.PREKEY_BATCH_SIZE);
 286
 287         final int offset = account.getPreKeyIdOffset();
 288         for (int i = 0; i < BaseConfig.PREKEY_BATCH_SIZE; i++) {
 289             int preKeyId = (offset + i) % Medium.MAX_VALUE;
 290             ECKeyPair keyPair = Curve.generateKeyPair();
 291             PreKeyRecord record = new PreKeyRecord(preKeyId, keyPair);
 292
 293             records.add(record);
 294         }
 295
 296         account.addPreKeys(records);
 297         account.save();
 298
 299         return records;
 300     }
 301
 302     private SignedPreKeyRecord generateSignedPreKey(IdentityKeyPair identityKeyPair) {
 303         try {
 304             ECKeyPair keyPair = Curve.generateKeyPair();
 305             byte[] signature = Curve.calculateSignature(identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
 306             SignedPreKeyRecord record = new SignedPreKeyRecord(account.getNextSignedPreKeyId(), System.currentTimeMillis(), keyPair, signature);
 307
 308             account.addSignedPreKey(record);
 309             account.save();
 310
 311             return record;
 312         } catch (InvalidKeyException e) {
 313             throw new AssertionError(e);
 314         }
 315     }
 316
 317     public void verifyAccount(String verificationCode, String pin) throws IOException {
 318         verificationCode = verificationCode.replace("-", "");
 319         account.setSignalingKey(KeyUtils.createSignalingKey());
 320         // TODO make unrestricted unidentified access configurable
 321         accountManager.verifyAccountWithCode(verificationCode, account.getSignalingKey(), account.getSignalProtocolStore().getLocalRegistrationId(), true, pin, getSelfUnidentifiedAccessKey(), false);
 322
 323         //accountManager.setGcmId(Optional.of(GoogleCloudMessaging.getInstance(this).register(REGISTRATION_ID)));
 324         account.setRegistered(true);
 325         account.setRegistrationLockPin(pin);
 326
 327         refreshPreKeys();
 328         account.save();
 329     }
 330
 331     public void setRegistrationLockPin(Optional<String> pin) throws IOException {
 332         accountManager.setPin(pin);
 333         if (pin.isPresent()) {
 334             account.setRegistrationLockPin(pin.get());
 335         } else {
 336             account.setRegistrationLockPin(null);
 337         }
 338         account.save();
 339     }
 340
 341     private void refreshPreKeys() throws IOException {
 342         List<PreKeyRecord> oneTimePreKeys = generatePreKeys();
 343         final IdentityKeyPair identityKeyPair = account.getSignalProtocolStore().getIdentityKeyPair();
 344         SignedPreKeyRecord signedPreKeyRecord = generateSignedPreKey(identityKeyPair);
 345
 346         accountManager.setPreKeys(getIdentity(), signedPreKeyRecord, oneTimePreKeys);
 347     }
 348
 349     private Optional<SignalServiceAttachmentStream> createGroupAvatarAttachment(byte[] groupId) throws IOException {
 350         File file = getGroupAvatarFile(groupId);
 351         if (!file.exists()) {
 352             return Optional.absent();
 353         }
 354
 355         return Optional.of(Utils.createAttachment(file));
 356     }
 357
 358     private Optional<SignalServiceAttachmentStream> createContactAvatarAttachment(String number) throws IOException {
 359         File file = getContactAvatarFile(number);
 360         if (!file.exists()) {
 361             return Optional.absent();
 362         }
 363
 364         return Optional.of(Utils.createAttachment(file));
 365     }
 366
 367     private GroupInfo getGroupForSending(byte[] groupId) throws GroupNotFoundException, NotAGroupMemberException {
 368         GroupInfo g = account.getGroupStore().getGroup(groupId);
 369         if (g == null) {
 370             throw new GroupNotFoundException(groupId);
 371         }
 372         for (String member : g.members) {
 373             if (member.equals(this.username)) {
 374                 return g;
 375             }
 376         }
 377         throw new NotAGroupMemberException(groupId, g.name);
 378     }
 379
 380     public List<GroupInfo> getGroups() {
 381         return account.getGroupStore().getGroups();
 382     }
 383
 384     @Override
 385     public void sendGroupMessage(String messageText, List<String> attachments,
 386                                  byte[] groupId)
 387             throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 388         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 389         if (attachments != null) {
 390             messageBuilder.withAttachments(Utils.getSignalServiceAttachments(attachments));
 391         }
 392         if (groupId != null) {
 393             SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.DELIVER)
 394                     .withId(groupId)
 395                     .build();
 396             messageBuilder.asGroupMessage(group);
 397         }
 398         ThreadInfo thread = account.getThreadStore().getThread(Base64.encodeBytes(groupId));
 399         if (thread != null) {
 400             messageBuilder.withExpiration(thread.messageExpirationTime);
 401         }
 402
 403         final GroupInfo g = getGroupForSending(groupId);
 404
 405         // Don't send group message to ourself
 406         final List<String> membersSend = new ArrayList<>(g.members);
 407         membersSend.remove(this.username);
 408         sendMessageLegacy(messageBuilder, membersSend);
 409     }
 410
 411     public void sendQuitGroupMessage(byte[] groupId) throws GroupNotFoundException, IOException, EncapsulatedExceptions {
 412         SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
 413                 .withId(groupId)
 414                 .build();
 415
 416         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 417                 .asGroupMessage(group);
 418
 419         final GroupInfo g = getGroupForSending(groupId);
 420         g.members.remove(this.username);
 421         account.getGroupStore().updateGroup(g);
 422
 423         sendMessageLegacy(messageBuilder, g.members);
 424     }
 425
 426     private byte[] sendUpdateGroupMessage(byte[] groupId, String name, Collection<String> members, String avatarFile) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 427         GroupInfo g;
 428         if (groupId == null) {
 429             // Create new group
 430             g = new GroupInfo(KeyUtils.createGroupId());
 431             g.members.add(username);
 432         } else {
 433             g = getGroupForSending(groupId);
 434         }
 435
 436         if (name != null) {
 437             g.name = name;
 438         }
 439
 440         if (members != null) {
 441             Set<String> newMembers = new HashSet<>();
 442             for (String member : members) {
 443                 try {
 444                     member = Utils.canonicalizeNumber(member, username);
 445                 } catch (InvalidNumberException e) {
 446                     System.err.println("Failed to add member \"" + member + "\" to group: " + e.getMessage());
 447                     System.err.println("Aborting…");
 448                     System.exit(1);
 449                 }
 450                 if (g.members.contains(member)) {
 451                     continue;
 452                 }
 453                 newMembers.add(member);
 454                 g.members.add(member);
 455             }
 456             final List<ContactTokenDetails> contacts = accountManager.getContacts(newMembers);
 457             if (contacts.size() != newMembers.size()) {
 458                 // Some of the new members are not registered on Signal
 459                 for (ContactTokenDetails contact : contacts) {
 460                     newMembers.remove(contact.getNumber());
 461                 }
 462                 System.err.println("Failed to add members " + Util.join(", ", newMembers) + " to group: Not registered on Signal");
 463                 System.err.println("Aborting…");
 464                 System.exit(1);
 465             }
 466         }
 467
 468         if (avatarFile != null) {
 469             IOUtils.createPrivateDirectories(avatarsPath);
 470             File aFile = getGroupAvatarFile(g.groupId);
 471             Files.copy(Paths.get(avatarFile), aFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
 472         }
 473
 474         account.getGroupStore().updateGroup(g);
 475
 476         SignalServiceDataMessage.Builder messageBuilder = getGroupUpdateMessageBuilder(g);
 477
 478         // Don't send group message to ourself
 479         final List<String> membersSend = new ArrayList<>(g.members);
 480         membersSend.remove(this.username);
 481         sendMessageLegacy(messageBuilder, membersSend);
 482         return g.groupId;
 483     }
 484
 485     private void sendUpdateGroupMessage(byte[] groupId, String recipient) throws IOException, EncapsulatedExceptions {
 486         if (groupId == null) {
 487             return;
 488         }
 489         GroupInfo g = getGroupForSending(groupId);
 490
 491         if (!g.members.contains(recipient)) {
 492             return;
 493         }
 494
 495         SignalServiceDataMessage.Builder messageBuilder = getGroupUpdateMessageBuilder(g);
 496
 497         // Send group message only to the recipient who requested it
 498         final List<String> membersSend = new ArrayList<>();
 499         membersSend.add(recipient);
 500         sendMessageLegacy(messageBuilder, membersSend);
 501     }
 502
 503     private SignalServiceDataMessage.Builder getGroupUpdateMessageBuilder(GroupInfo g) {
 504         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.UPDATE)
 505                 .withId(g.groupId)
 506                 .withName(g.name)
 507                 .withMembers(new ArrayList<>(g.members));
 508
 509         File aFile = getGroupAvatarFile(g.groupId);
 510         if (aFile.exists()) {
 511             try {
 512                 group.withAvatar(Utils.createAttachment(aFile));
 513             } catch (IOException e) {
 514                 throw new AttachmentInvalidException(aFile.toString(), e);
 515             }
 516         }
 517
 518         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 519                 .asGroupMessage(group.build());
 520
 521         ThreadInfo thread = account.getThreadStore().getThread(Base64.encodeBytes(g.groupId));
 522         if (thread != null) {
 523             messageBuilder.withExpiration(thread.messageExpirationTime);
 524         }
 525
 526         return messageBuilder;
 527     }
 528
 529     private void sendGroupInfoRequest(byte[] groupId, String recipient) throws IOException, EncapsulatedExceptions {
 530         if (groupId == null) {
 531             return;
 532         }
 533
 534         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.REQUEST_INFO)
 535                 .withId(groupId);
 536
 537         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 538                 .asGroupMessage(group.build());
 539
 540         ThreadInfo thread = account.getThreadStore().getThread(Base64.encodeBytes(groupId));
 541         if (thread != null) {
 542             messageBuilder.withExpiration(thread.messageExpirationTime);
 543         }
 544
 545         // Send group info request message to the recipient who sent us a message with this groupId
 546         final List<String> membersSend = new ArrayList<>();
 547         membersSend.add(recipient);
 548         sendMessageLegacy(messageBuilder, membersSend);
 549     }
 550
 551     @Override
 552     public void sendMessage(String message, List<String> attachments, String recipient)
 553             throws EncapsulatedExceptions, AttachmentInvalidException, IOException {
 554         List<String> recipients = new ArrayList<>(1);
 555         recipients.add(recipient);
 556         sendMessage(message, attachments, recipients);
 557     }
 558
 559     @Override
 560     public void sendMessage(String messageText, List<String> attachments,
 561                             List<String> recipients)
 562             throws IOException, EncapsulatedExceptions, AttachmentInvalidException {
 563         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 564         if (attachments != null) {
 565             messageBuilder.withAttachments(Utils.getSignalServiceAttachments(attachments));
 566         }
 567         sendMessageLegacy(messageBuilder, recipients);
 568     }
 569
 570     @Override
 571     public void sendEndSessionMessage(List<String> recipients) throws IOException, EncapsulatedExceptions {
 572         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 573                 .asEndSessionMessage();
 574
 575         sendMessageLegacy(messageBuilder, recipients);
 576     }
 577
 578     @Override
 579     public String getContactName(String number) {
 580         ContactInfo contact = account.getContactStore().getContact(number);
 581         if (contact == null) {
 582             return "";
 583         } else {
 584             return contact.name;
 585         }
 586     }
 587
 588     @Override
 589     public void setContactName(String number, String name) {
 590         ContactInfo contact = account.getContactStore().getContact(number);
 591         if (contact == null) {
 592             contact = new ContactInfo();
 593             contact.number = number;
 594             System.err.println("Add contact " + number + " named " + name);
 595         } else {
 596             System.err.println("Updating contact " + number + " name " + contact.name + " -> " + name);
 597         }
 598         contact.name = name;
 599         account.getContactStore().updateContact(contact);
 600         account.save();
 601     }
 602
 603     @Override
 604     public List<byte[]> getGroupIds() {
 605         List<GroupInfo> groups = getGroups();
 606         List<byte[]> ids = new ArrayList<>(groups.size());
 607         for (GroupInfo group : groups) {
 608             ids.add(group.groupId);
 609         }
 610         return ids;
 611     }
 612
 613     @Override
 614     public String getGroupName(byte[] groupId) {
 615         GroupInfo group = getGroup(groupId);
 616         if (group == null) {
 617             return "";
 618         } else {
 619             return group.name;
 620         }
 621     }
 622
 623     @Override
 624     public List<String> getGroupMembers(byte[] groupId) {
 625         GroupInfo group = getGroup(groupId);
 626         if (group == null) {
 627             return new ArrayList<>();
 628         } else {
 629             return new ArrayList<>(group.members);
 630         }
 631     }
 632
 633     @Override
 634     public byte[] updateGroup(byte[] groupId, String name, List<String> members, String avatar) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 635         if (groupId.length == 0) {
 636             groupId = null;
 637         }
 638         if (name.isEmpty()) {
 639             name = null;
 640         }
 641         if (members.size() == 0) {
 642             members = null;
 643         }
 644         if (avatar.isEmpty()) {
 645             avatar = null;
 646         }
 647         return sendUpdateGroupMessage(groupId, name, members, avatar);
 648     }
 649
 650     /**
 651      * Change the expiration timer for a thread (number of groupId)
 652      *
 653      * @param numberOrGroupId
 654      * @param messageExpirationTimer
 655      */
 656     public void setExpirationTimer(String numberOrGroupId, int messageExpirationTimer) {
 657         ThreadInfo thread = account.getThreadStore().getThread(numberOrGroupId);
 658         thread.messageExpirationTime = messageExpirationTimer;
 659         account.getThreadStore().updateThread(thread);
 660     }
 661
 662     private void requestSyncGroups() throws IOException {
 663         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.GROUPS).build();
 664         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 665         try {
 666             sendSyncMessage(message);
 667         } catch (UntrustedIdentityException e) {
 668             e.printStackTrace();
 669         }
 670     }
 671
 672     private void requestSyncContacts() throws IOException {
 673         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONTACTS).build();
 674         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 675         try {
 676             sendSyncMessage(message);
 677         } catch (UntrustedIdentityException e) {
 678             e.printStackTrace();
 679         }
 680     }
 681
 682     private void requestSyncBlocked() throws IOException {
 683         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.BLOCKED).build();
 684         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 685         try {
 686             sendSyncMessage(message);
 687         } catch (UntrustedIdentityException e) {
 688             e.printStackTrace();
 689         }
 690     }
 691
 692     private void requestSyncConfiguration() throws IOException {
 693         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONFIGURATION).build();
 694         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 695         try {
 696             sendSyncMessage(message);
 697         } catch (UntrustedIdentityException e) {
 698             e.printStackTrace();
 699         }
 700     }
 701
 702     private byte[] getSelfUnidentifiedAccessKey() {
 703         return UnidentifiedAccess.deriveAccessKeyFrom(account.getProfileKey());
 704     }
 705
 706     private byte[] getTargetUnidentifiedAccessKey(SignalServiceAddress recipient) {
 707         // TODO implement
 708         return null;
 709     }
 710
 711     private Optional<UnidentifiedAccessPair> getAccessForSync() {
 712         // TODO implement
 713         return Optional.absent();
 714     }
 715
 716     private List<Optional<UnidentifiedAccessPair>> getAccessFor(Collection<SignalServiceAddress> recipients) {
 717         List<Optional<UnidentifiedAccessPair>> result = new ArrayList<>(recipients.size());
 718         for (SignalServiceAddress recipient : recipients) {
 719             result.add(Optional.<UnidentifiedAccessPair>absent());
 720         }
 721         return result;
 722     }
 723
 724     private Optional<UnidentifiedAccessPair> getAccessFor(SignalServiceAddress recipient) {
 725         // TODO implement
 726         return Optional.absent();
 727     }
 728
 729     private void sendSyncMessage(SignalServiceSyncMessage message)
 730             throws IOException, UntrustedIdentityException {
 731         SignalServiceMessageSender messageSender = new SignalServiceMessageSender(BaseConfig.serviceConfiguration, username, account.getPassword(),
 732                 account.getDeviceId(), account.getSignalProtocolStore(), BaseConfig.USER_AGENT, account.isMultiDevice(), Optional.fromNullable(messagePipe), Optional.fromNullable(unidentifiedMessagePipe), Optional.<SignalServiceMessageSender.EventListener>absent());
 733         try {
 734             messageSender.sendMessage(message, getAccessForSync());
 735         } catch (UntrustedIdentityException e) {
 736             account.getSignalProtocolStore().saveIdentity(e.getE164Number(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
 737             throw e;
 738         }
 739     }
 740
 741     /**
 742      * This method throws an EncapsulatedExceptions exception instead of returning a list of SendMessageResult.
 743      */
 744     private void sendMessageLegacy(SignalServiceDataMessage.Builder messageBuilder, Collection<String> recipients)
 745             throws EncapsulatedExceptions, IOException {
 746         List<SendMessageResult> results = sendMessage(messageBuilder, recipients);
 747
 748         List<UntrustedIdentityException> untrustedIdentities = new LinkedList<>();
 749         List<UnregisteredUserException> unregisteredUsers = new LinkedList<>();
 750         List<NetworkFailureException> networkExceptions = new LinkedList<>();
 751
 752         for (SendMessageResult result : results) {
 753             if (result.isUnregisteredFailure()) {
 754                 unregisteredUsers.add(new UnregisteredUserException(result.getAddress().getNumber(), null));
 755             } else if (result.isNetworkFailure()) {
 756                 networkExceptions.add(new NetworkFailureException(result.getAddress().getNumber(), null));
 757             } else if (result.getIdentityFailure() != null) {
 758                 untrustedIdentities.add(new UntrustedIdentityException("Untrusted", result.getAddress().getNumber(), result.getIdentityFailure().getIdentityKey()));
 759             }
 760         }
 761         if (!untrustedIdentities.isEmpty() || !unregisteredUsers.isEmpty() || !networkExceptions.isEmpty()) {
 762             throw new EncapsulatedExceptions(untrustedIdentities, unregisteredUsers, networkExceptions);
 763         }
 764     }
 765
 766     private List<SendMessageResult> sendMessage(SignalServiceDataMessage.Builder messageBuilder, Collection<String> recipients)
 767             throws IOException {
 768         Set<SignalServiceAddress> recipientsTS = Utils.getSignalServiceAddresses(recipients, username);
 769         if (recipientsTS == null) {
 770             account.save();
 771             return Collections.emptyList();
 772         }
 773
 774         SignalServiceDataMessage message = null;
 775         try {
 776             SignalServiceMessageSender messageSender = new SignalServiceMessageSender(BaseConfig.serviceConfiguration, username, account.getPassword(),
 777                     account.getDeviceId(), account.getSignalProtocolStore(), BaseConfig.USER_AGENT, account.isMultiDevice(), Optional.fromNullable(messagePipe), Optional.fromNullable(unidentifiedMessagePipe), Optional.<SignalServiceMessageSender.EventListener>absent());
 778
 779             message = messageBuilder.build();
 780             if (message.getGroupInfo().isPresent()) {
 781                 try {
 782                     final boolean isRecipientUpdate = false;
 783                     List<SendMessageResult> result = messageSender.sendMessage(new ArrayList<>(recipientsTS), getAccessFor(recipientsTS), isRecipientUpdate, message);
 784                     for (SendMessageResult r : result) {
 785                         if (r.getIdentityFailure() != null) {
 786                             account.getSignalProtocolStore().saveIdentity(r.getAddress().getNumber(), r.getIdentityFailure().getIdentityKey(), TrustLevel.UNTRUSTED);
 787                         }
 788                     }
 789                     return result;
 790                 } catch (UntrustedIdentityException e) {
 791                     account.getSignalProtocolStore().saveIdentity(e.getE164Number(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
 792                     return Collections.emptyList();
 793                 }
 794             } else if (recipientsTS.size() == 1 && recipientsTS.contains(new SignalServiceAddress(username))) {
 795                 SignalServiceAddress recipient = new SignalServiceAddress(username);
 796                 final Optional<UnidentifiedAccessPair> unidentifiedAccess = getAccessFor(recipient);
 797                 SentTranscriptMessage transcript = new SentTranscriptMessage(recipient.getNumber(),
 798                         message.getTimestamp(),
 799                         message,
 800                         message.getExpiresInSeconds(),
 801                         Collections.singletonMap(recipient.getNumber(), unidentifiedAccess.isPresent()),
 802                         false);
 803                 SignalServiceSyncMessage syncMessage = SignalServiceSyncMessage.forSentTranscript(transcript);
 804
 805                 List<SendMessageResult> results = new ArrayList<>(recipientsTS.size());
 806                 try {
 807                     messageSender.sendMessage(syncMessage, unidentifiedAccess);
 808                 } catch (UntrustedIdentityException e) {
 809                     account.getSignalProtocolStore().saveIdentity(e.getE164Number(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
 810                     results.add(SendMessageResult.identityFailure(recipient, e.getIdentityKey()));
 811                 }
 812                 return results;
 813             } else {
 814                 // Send to all individually, so sync messages are sent correctly
 815                 List<SendMessageResult> results = new ArrayList<>(recipientsTS.size());
 816                 for (SignalServiceAddress address : recipientsTS) {
 817                     ThreadInfo thread = account.getThreadStore().getThread(address.getNumber());
 818                     if (thread != null) {
 819                         messageBuilder.withExpiration(thread.messageExpirationTime);
 820                     } else {
 821                         messageBuilder.withExpiration(0);
 822                     }
 823                     message = messageBuilder.build();
 824                     try {
 825                         SendMessageResult result = messageSender.sendMessage(address, getAccessFor(address), message);
 826                         results.add(result);
 827                     } catch (UntrustedIdentityException e) {
 828                         account.getSignalProtocolStore().saveIdentity(e.getE164Number(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
 829                         results.add(SendMessageResult.identityFailure(address, e.getIdentityKey()));
 830                     }
 831                 }
 832                 return results;
 833             }
 834         } finally {
 835             if (message != null && message.isEndSession()) {
 836                 for (SignalServiceAddress recipient : recipientsTS) {
 837                     handleEndSession(recipient.getNumber());
 838                 }
 839             }
 840             account.save();
 841         }
 842     }
 843
 844     private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) throws InvalidMetadataMessageException, ProtocolInvalidMessageException, ProtocolDuplicateMessageException, ProtocolLegacyMessageException, ProtocolInvalidKeyIdException, InvalidMetadataVersionException, ProtocolInvalidVersionException, ProtocolNoSessionException, ProtocolInvalidKeyException, ProtocolUntrustedIdentityException, SelfSendException, UnsupportedDataMessageException {
 845         SignalServiceCipher cipher = new SignalServiceCipher(new SignalServiceAddress(username), account.getSignalProtocolStore(), Utils.getCertificateValidator());
 846         try {
 847             return cipher.decrypt(envelope);
 848         } catch (ProtocolUntrustedIdentityException e) {
 849             // TODO We don't get the new untrusted identity from ProtocolUntrustedIdentityException anymore ... we need to get it from somewhere else
 850 //            account.getSignalProtocolStore().saveIdentity(e.getSender(), e.getUntrustedIdentity(), TrustLevel.UNTRUSTED);
 851             throw e;
 852         }
 853     }
 854
 855     private void handleEndSession(String source) {
 856         account.getSignalProtocolStore().deleteAllSessions(source);
 857     }
 858
 859     private void handleSignalServiceDataMessage(SignalServiceDataMessage message, boolean isSync, String source, String destination, boolean ignoreAttachments) {
 860         String threadId;
 861         if (message.getGroupInfo().isPresent()) {
 862             SignalServiceGroup groupInfo = message.getGroupInfo().get();
 863             threadId = Base64.encodeBytes(groupInfo.getGroupId());
 864             GroupInfo group = account.getGroupStore().getGroup(groupInfo.getGroupId());
 865             switch (groupInfo.getType()) {
 866                 case UPDATE:
 867                     if (group == null) {
 868                         group = new GroupInfo(groupInfo.getGroupId());
 869                     }
 870
 871                     if (groupInfo.getAvatar().isPresent()) {
 872                         SignalServiceAttachment avatar = groupInfo.getAvatar().get();
 873                         if (avatar.isPointer()) {
 874                             try {
 875                                 retrieveGroupAvatarAttachment(avatar.asPointer(), group.groupId);
 876                             } catch (IOException | InvalidMessageException e) {
 877                                 System.err.println("Failed to retrieve group avatar (" + avatar.asPointer().getId() + "): " + e.getMessage());
 878                             }
 879                         }
 880                     }
 881
 882                     if (groupInfo.getName().isPresent()) {
 883                         group.name = groupInfo.getName().get();
 884                     }
 885
 886                     if (groupInfo.getMembers().isPresent()) {
 887                         group.members.addAll(groupInfo.getMembers().get());
 888                     }
 889
 890                     account.getGroupStore().updateGroup(group);
 891                     break;
 892                 case DELIVER:
 893                     if (group == null) {
 894                         try {
 895                             sendGroupInfoRequest(groupInfo.getGroupId(), source);
 896                         } catch (IOException | EncapsulatedExceptions e) {
 897                             e.printStackTrace();
 898                         }
 899                     }
 900                     break;
 901                 case QUIT:
 902                     if (group == null) {
 903                         try {
 904                             sendGroupInfoRequest(groupInfo.getGroupId(), source);
 905                         } catch (IOException | EncapsulatedExceptions e) {
 906                             e.printStackTrace();
 907                         }
 908                     } else {
 909                         group.members.remove(source);
 910                         account.getGroupStore().updateGroup(group);
 911                     }
 912                     break;
 913                 case REQUEST_INFO:
 914                     if (group != null) {
 915                         try {
 916                             sendUpdateGroupMessage(groupInfo.getGroupId(), source);
 917                         } catch (IOException | EncapsulatedExceptions e) {
 918                             e.printStackTrace();
 919                         } catch (NotAGroupMemberException e) {
 920                             // We have left this group, so don't send a group update message
 921                         }
 922                     }
 923                     break;
 924             }
 925         } else {
 926             if (isSync) {
 927                 threadId = destination;
 928             } else {
 929                 threadId = source;
 930             }
 931         }
 932         if (message.isEndSession()) {
 933             handleEndSession(isSync ? destination : source);
 934         }
 935         if (message.isExpirationUpdate() || message.getBody().isPresent()) {
 936             ThreadInfo thread = account.getThreadStore().getThread(threadId);
 937             if (thread == null) {
 938                 thread = new ThreadInfo();
 939                 thread.id = threadId;
 940             }
 941             if (thread.messageExpirationTime != message.getExpiresInSeconds()) {
 942                 thread.messageExpirationTime = message.getExpiresInSeconds();
 943                 account.getThreadStore().updateThread(thread);
 944             }
 945         }
 946         if (message.getAttachments().isPresent() && !ignoreAttachments) {
 947             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
 948                 if (attachment.isPointer()) {
 949                     try {
 950                         retrieveAttachment(attachment.asPointer());
 951                     } catch (IOException | InvalidMessageException e) {
 952                         System.err.println("Failed to retrieve attachment (" + attachment.asPointer().getId() + "): " + e.getMessage());
 953                     }
 954                 }
 955             }
 956         }
 957         if (message.getProfileKey().isPresent() && message.getProfileKey().get().length == 32) {
 958             if (source.equals(username)) {
 959                 this.account.setProfileKey(message.getProfileKey().get());
 960             }
 961             ContactInfo contact = account.getContactStore().getContact(source);
 962             if (contact == null) {
 963                 contact = new ContactInfo();
 964                 contact.number = source;
 965             }
 966             contact.profileKey = Base64.encodeBytes(message.getProfileKey().get());
 967         }
 968     }
 969
 970     private void retryFailedReceivedMessages(ReceiveMessageHandler handler, boolean ignoreAttachments) {
 971         final File cachePath = new File(getMessageCachePath());
 972         if (!cachePath.exists()) {
 973             return;
 974         }
 975         for (final File dir : Objects.requireNonNull(cachePath.listFiles())) {
 976             if (!dir.isDirectory()) {
 977                 continue;
 978             }
 979
 980             for (final File fileEntry : Objects.requireNonNull(dir.listFiles())) {
 981                 if (!fileEntry.isFile()) {
 982                     continue;
 983                 }
 984                 SignalServiceEnvelope envelope;
 985                 try {
 986                     envelope = Utils.loadEnvelope(fileEntry);
 987                     if (envelope == null) {
 988                         continue;
 989                     }
 990                 } catch (IOException e) {
 991                     e.printStackTrace();
 992                     continue;
 993                 }
 994                 SignalServiceContent content = null;
 995                 if (!envelope.isReceipt()) {
 996                     try {
 997                         content = decryptMessage(envelope);
 998                     } catch (Exception e) {
 999                         continue;
1000                     }
1001                     handleMessage(envelope, content, ignoreAttachments);
1002                 }
1003                 account.save();
1004                 handler.handleMessage(envelope, content, null);
1005                 try {
1006                     Files.delete(fileEntry.toPath());
1007                 } catch (IOException e) {
1008                     System.err.println("Failed to delete cached message file “" + fileEntry + "”: " + e.getMessage());
1009                 }
1010             }
1011             // Try to delete directory if empty
1012             dir.delete();
1013         }
1014     }
1015
1016     public void receiveMessages(long timeout, TimeUnit unit, boolean returnOnTimeout, boolean ignoreAttachments, ReceiveMessageHandler handler) throws IOException {
1017         retryFailedReceivedMessages(handler, ignoreAttachments);
1018         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(BaseConfig.serviceConfiguration, username, account.getPassword(), account.getDeviceId(), account.getSignalingKey(), BaseConfig.USER_AGENT, null, timer);
1019
1020         try {
1021             if (messagePipe == null) {
1022                 messagePipe = messageReceiver.createMessagePipe();
1023             }
1024
1025             while (true) {
1026                 SignalServiceEnvelope envelope;
1027                 SignalServiceContent content = null;
1028                 Exception exception = null;
1029                 final long now = new Date().getTime();
1030                 try {
1031                     envelope = messagePipe.read(timeout, unit, new SignalServiceMessagePipe.MessagePipeCallback() {
1032                         @Override
1033                         public void onMessage(SignalServiceEnvelope envelope) {
1034                             // store message on disk, before acknowledging receipt to the server
1035                             try {
1036                                 File cacheFile = getMessageCacheFile(envelope.getSource(), now, envelope.getTimestamp());
1037                                 Utils.storeEnvelope(envelope, cacheFile);
1038                             } catch (IOException e) {
1039                                 System.err.println("Failed to store encrypted message in disk cache, ignoring: " + e.getMessage());
1040                             }
1041                         }
1042                     });
1043                 } catch (TimeoutException e) {
1044                     if (returnOnTimeout)
1045                         return;
1046                     continue;
1047                 } catch (InvalidVersionException e) {
1048                     System.err.println("Ignoring error: " + e.getMessage());
1049                     continue;
1050                 }
1051                 if (!envelope.isReceipt()) {
1052                     try {
1053                         content = decryptMessage(envelope);
1054                     } catch (Exception e) {
1055                         exception = e;
1056                     }
1057                     handleMessage(envelope, content, ignoreAttachments);
1058                 }
1059                 account.save();
1060                 handler.handleMessage(envelope, content, exception);
1061                 if (!(exception instanceof ProtocolUntrustedIdentityException)) {
1062                     File cacheFile = null;
1063                     try {
1064                         cacheFile = getMessageCacheFile(envelope.getSource(), now, envelope.getTimestamp());
1065                         Files.delete(cacheFile.toPath());
1066                         // Try to delete directory if empty
1067                         new File(getMessageCachePath()).delete();
1068                     } catch (IOException e) {
1069                         System.err.println("Failed to delete cached message file “" + cacheFile + "”: " + e.getMessage());
1070                     }
1071                 }
1072             }
1073         } finally {
1074             if (messagePipe != null) {
1075                 messagePipe.shutdown();
1076                 messagePipe = null;
1077             }
1078         }
1079     }
1080
1081     private void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, boolean ignoreAttachments) {
1082         if (content != null) {
1083             if (content.getDataMessage().isPresent()) {
1084                 SignalServiceDataMessage message = content.getDataMessage().get();
1085                 handleSignalServiceDataMessage(message, false, envelope.getSource(), username, ignoreAttachments);
1086             }
1087             if (content.getSyncMessage().isPresent()) {
1088                 account.setMultiDevice(true);
1089                 SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
1090                 if (syncMessage.getSent().isPresent()) {
1091                     SignalServiceDataMessage message = syncMessage.getSent().get().getMessage();
1092                     handleSignalServiceDataMessage(message, true, envelope.getSource(), syncMessage.getSent().get().getDestination().get(), ignoreAttachments);
1093                 }
1094                 if (syncMessage.getRequest().isPresent()) {
1095                     RequestMessage rm = syncMessage.getRequest().get();
1096                     if (rm.isContactsRequest()) {
1097                         try {
1098                             sendContacts();
1099                         } catch (UntrustedIdentityException | IOException e) {
1100                             e.printStackTrace();
1101                         }
1102                     }
1103                     if (rm.isGroupsRequest()) {
1104                         try {
1105                             sendGroups();
1106                         } catch (UntrustedIdentityException | IOException e) {
1107                             e.printStackTrace();
1108                         }
1109                     }
1110                     // TODO Handle rm.isBlockedListRequest(); rm.isConfigurationRequest();
1111                 }
1112                 if (syncMessage.getGroups().isPresent()) {
1113                     File tmpFile = null;
1114                     try {
1115                         tmpFile = IOUtils.createTempFile();
1116                         try (InputStream attachmentAsStream = retrieveAttachmentAsStream(syncMessage.getGroups().get().asPointer(), tmpFile)) {
1117                             DeviceGroupsInputStream s = new DeviceGroupsInputStream(attachmentAsStream);
1118                             DeviceGroup g;
1119                             while ((g = s.read()) != null) {
1120                                 GroupInfo syncGroup = account.getGroupStore().getGroup(g.getId());
1121                                 if (syncGroup == null) {
1122                                     syncGroup = new GroupInfo(g.getId());
1123                                 }
1124                                 if (g.getName().isPresent()) {
1125                                     syncGroup.name = g.getName().get();
1126                                 }
1127                                 syncGroup.members.addAll(g.getMembers());
1128                                 syncGroup.active = g.isActive();
1129                                 if (g.getColor().isPresent()) {
1130                                     syncGroup.color = g.getColor().get();
1131                                 }
1132
1133                                 if (g.getAvatar().isPresent()) {
1134                                     retrieveGroupAvatarAttachment(g.getAvatar().get(), syncGroup.groupId);
1135                                 }
1136                                 account.getGroupStore().updateGroup(syncGroup);
1137                             }
1138                         }
1139                     } catch (Exception e) {
1140                         e.printStackTrace();
1141                     } finally {
1142                         if (tmpFile != null) {
1143                             try {
1144                                 Files.delete(tmpFile.toPath());
1145                             } catch (IOException e) {
1146                                 System.err.println("Failed to delete received groups temp file “" + tmpFile + "”: " + e.getMessage());
1147                             }
1148                         }
1149                     }
1150                 }
1151                 if (syncMessage.getBlockedList().isPresent()) {
1152                     // TODO store list of blocked numbers
1153                 }
1154                 if (syncMessage.getContacts().isPresent()) {
1155                     File tmpFile = null;
1156                     try {
1157                         tmpFile = IOUtils.createTempFile();
1158                         final ContactsMessage contactsMessage = syncMessage.getContacts().get();
1159                         try (InputStream attachmentAsStream = retrieveAttachmentAsStream(contactsMessage.getContactsStream().asPointer(), tmpFile)) {
1160                             DeviceContactsInputStream s = new DeviceContactsInputStream(attachmentAsStream);
1161                             if (contactsMessage.isComplete()) {
1162                                 account.getContactStore().clear();
1163                             }
1164                             DeviceContact c;
1165                             while ((c = s.read()) != null) {
1166                                 if (c.getNumber().equals(account.getUsername()) && c.getProfileKey().isPresent()) {
1167                                     account.setProfileKey(c.getProfileKey().get());
1168                                 }
1169                                 ContactInfo contact = account.getContactStore().getContact(c.getNumber());
1170                                 if (contact == null) {
1171                                     contact = new ContactInfo();
1172                                     contact.number = c.getNumber();
1173                                 }
1174                                 if (c.getName().isPresent()) {
1175                                     contact.name = c.getName().get();
1176                                 }
1177                                 if (c.getColor().isPresent()) {
1178                                     contact.color = c.getColor().get();
1179                                 }
1180                                 if (c.getProfileKey().isPresent()) {
1181                                     contact.profileKey = Base64.encodeBytes(c.getProfileKey().get());
1182                                 }
1183                                 if (c.getVerified().isPresent()) {
1184                                     final VerifiedMessage verifiedMessage = c.getVerified().get();
1185                                     account.getSignalProtocolStore().saveIdentity(verifiedMessage.getDestination(), verifiedMessage.getIdentityKey(), TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
1186                                 }
1187                                 if (c.getExpirationTimer().isPresent()) {
1188                                     ThreadInfo thread = account.getThreadStore().getThread(c.getNumber());
1189                                     if (thread == null) {
1190                                         thread = new ThreadInfo();
1191                                         thread.id = c.getNumber();
1192                                     }
1193                                     thread.messageExpirationTime = c.getExpirationTimer().get();
1194                                     account.getThreadStore().updateThread(thread);
1195                                 }
1196                                 if (c.isBlocked()) {
1197                                     // TODO store list of blocked numbers
1198                                 }
1199                                 account.getContactStore().updateContact(contact);
1200
1201                                 if (c.getAvatar().isPresent()) {
1202                                     retrieveContactAvatarAttachment(c.getAvatar().get(), contact.number);
1203                                 }
1204                             }
1205                         }
1206                     } catch (Exception e) {
1207                         e.printStackTrace();
1208                     } finally {
1209                         if (tmpFile != null) {
1210                             try {
1211                                 Files.delete(tmpFile.toPath());
1212                             } catch (IOException e) {
1213                                 System.err.println("Failed to delete received contacts temp file “" + tmpFile + "”: " + e.getMessage());
1214                             }
1215                         }
1216                     }
1217                 }
1218                 if (syncMessage.getVerified().isPresent()) {
1219                     final VerifiedMessage verifiedMessage = syncMessage.getVerified().get();
1220                     account.getSignalProtocolStore().saveIdentity(verifiedMessage.getDestination(), verifiedMessage.getIdentityKey(), TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
1221                 }
1222                 if (syncMessage.getConfiguration().isPresent()) {
1223                     // TODO
1224                 }
1225             }
1226         }
1227     }
1228
1229     private File getContactAvatarFile(String number) {
1230         return new File(avatarsPath, "contact-" + number);
1231     }
1232
1233     private File retrieveContactAvatarAttachment(SignalServiceAttachment attachment, String number) throws IOException, InvalidMessageException {
1234         IOUtils.createPrivateDirectories(avatarsPath);
1235         if (attachment.isPointer()) {
1236             SignalServiceAttachmentPointer pointer = attachment.asPointer();
1237             return retrieveAttachment(pointer, getContactAvatarFile(number), false);
1238         } else {
1239             SignalServiceAttachmentStream stream = attachment.asStream();
1240             return Utils.retrieveAttachment(stream, getContactAvatarFile(number));
1241         }
1242     }
1243
1244     private File getGroupAvatarFile(byte[] groupId) {
1245         return new File(avatarsPath, "group-" + Base64.encodeBytes(groupId).replace("/", "_"));
1246     }
1247
1248     private File retrieveGroupAvatarAttachment(SignalServiceAttachment attachment, byte[] groupId) throws IOException, InvalidMessageException {
1249         IOUtils.createPrivateDirectories(avatarsPath);
1250         if (attachment.isPointer()) {
1251             SignalServiceAttachmentPointer pointer = attachment.asPointer();
1252             return retrieveAttachment(pointer, getGroupAvatarFile(groupId), false);
1253         } else {
1254             SignalServiceAttachmentStream stream = attachment.asStream();
1255             return Utils.retrieveAttachment(stream, getGroupAvatarFile(groupId));
1256         }
1257     }
1258
1259     public File getAttachmentFile(long attachmentId) {
1260         return new File(attachmentsPath, attachmentId + "");
1261     }
1262
1263     private File retrieveAttachment(SignalServiceAttachmentPointer pointer) throws IOException, InvalidMessageException {
1264         IOUtils.createPrivateDirectories(attachmentsPath);
1265         return retrieveAttachment(pointer, getAttachmentFile(pointer.getId()), true);
1266     }
1267
1268     private File retrieveAttachment(SignalServiceAttachmentPointer pointer, File outputFile, boolean storePreview) throws IOException, InvalidMessageException {
1269         if (storePreview && pointer.getPreview().isPresent()) {
1270             File previewFile = new File(outputFile + ".preview");
1271             try (OutputStream output = new FileOutputStream(previewFile)) {
1272                 byte[] preview = pointer.getPreview().get();
1273                 output.write(preview, 0, preview.length);
1274             } catch (FileNotFoundException e) {
1275                 e.printStackTrace();
1276                 return null;
1277             }
1278         }
1279
1280         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(BaseConfig.serviceConfiguration, username, account.getPassword(), account.getDeviceId(), account.getSignalingKey(), BaseConfig.USER_AGENT, null, timer);
1281
1282         File tmpFile = IOUtils.createTempFile();
1283         try (InputStream input = messageReceiver.retrieveAttachment(pointer, tmpFile, BaseConfig.MAX_ATTACHMENT_SIZE)) {
1284             try (OutputStream output = new FileOutputStream(outputFile)) {
1285                 byte[] buffer = new byte[4096];
1286                 int read;
1287
1288                 while ((read = input.read(buffer)) != -1) {
1289                     output.write(buffer, 0, read);
1290                 }
1291             } catch (FileNotFoundException e) {
1292                 e.printStackTrace();
1293                 return null;
1294             }
1295         } finally {
1296             try {
1297                 Files.delete(tmpFile.toPath());
1298             } catch (IOException e) {
1299                 System.err.println("Failed to delete received attachment temp file “" + tmpFile + "”: " + e.getMessage());
1300             }
1301         }
1302         return outputFile;
1303     }
1304
1305     private InputStream retrieveAttachmentAsStream(SignalServiceAttachmentPointer pointer, File tmpFile) throws IOException, InvalidMessageException {
1306         final SignalServiceMessageReceiver messageReceiver = new SignalServiceMessageReceiver(BaseConfig.serviceConfiguration, username, account.getPassword(), account.getDeviceId(), account.getSignalingKey(), BaseConfig.USER_AGENT, null, timer);
1307         return messageReceiver.retrieveAttachment(pointer, tmpFile, BaseConfig.MAX_ATTACHMENT_SIZE);
1308     }
1309
1310     @Override
1311     public boolean isRemote() {
1312         return false;
1313     }
1314
1315     private void sendGroups() throws IOException, UntrustedIdentityException {
1316         File groupsFile = IOUtils.createTempFile();
1317
1318         try {
1319             try (OutputStream fos = new FileOutputStream(groupsFile)) {
1320                 DeviceGroupsOutputStream out = new DeviceGroupsOutputStream(fos);
1321                 for (GroupInfo record : account.getGroupStore().getGroups()) {
1322                     ThreadInfo info = account.getThreadStore().getThread(Base64.encodeBytes(record.groupId));
1323                     out.write(new DeviceGroup(record.groupId, Optional.fromNullable(record.name),
1324                             new ArrayList<>(record.members), createGroupAvatarAttachment(record.groupId),
1325                             record.active, Optional.fromNullable(info != null ? info.messageExpirationTime : null),
1326                             Optional.fromNullable(record.color), false));
1327                 }
1328             }
1329
1330             if (groupsFile.exists() && groupsFile.length() > 0) {
1331                 try (FileInputStream groupsFileStream = new FileInputStream(groupsFile)) {
1332                     SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
1333                             .withStream(groupsFileStream)
1334                             .withContentType("application/octet-stream")
1335                             .withLength(groupsFile.length())
1336                             .build();
1337
1338                     sendSyncMessage(SignalServiceSyncMessage.forGroups(attachmentStream));
1339                 }
1340             }
1341         } finally {
1342             try {
1343                 Files.delete(groupsFile.toPath());
1344             } catch (IOException e) {
1345                 System.err.println("Failed to delete groups temp file “" + groupsFile + "”: " + e.getMessage());
1346             }
1347         }
1348     }
1349
1350     private void sendContacts() throws IOException, UntrustedIdentityException {
1351         File contactsFile = IOUtils.createTempFile();
1352
1353         try {
1354             try (OutputStream fos = new FileOutputStream(contactsFile)) {
1355                 DeviceContactsOutputStream out = new DeviceContactsOutputStream(fos);
1356                 for (ContactInfo record : account.getContactStore().getContacts()) {
1357                     VerifiedMessage verifiedMessage = null;
1358                     ThreadInfo info = account.getThreadStore().getThread(record.number);
1359                     if (getIdentities().containsKey(record.number)) {
1360                         JsonIdentityKeyStore.Identity currentIdentity = null;
1361                         for (JsonIdentityKeyStore.Identity id : getIdentities().get(record.number)) {
1362                             if (currentIdentity == null || id.getDateAdded().after(currentIdentity.getDateAdded())) {
1363                                 currentIdentity = id;
1364                             }
1365                         }
1366                         if (currentIdentity != null) {
1367                             verifiedMessage = new VerifiedMessage(record.number, currentIdentity.getIdentityKey(), currentIdentity.getTrustLevel().toVerifiedState(), currentIdentity.getDateAdded().getTime());
1368                         }
1369                     }
1370
1371                     byte[] profileKey = record.profileKey == null ? null : Base64.decode(record.profileKey);
1372                     // TODO store list of blocked numbers
1373                     boolean blocked = false;
1374                     out.write(new DeviceContact(record.number, Optional.fromNullable(record.name),
1375                             createContactAvatarAttachment(record.number), Optional.fromNullable(record.color),
1376                             Optional.fromNullable(verifiedMessage), Optional.fromNullable(profileKey), blocked, Optional.fromNullable(info != null ? info.messageExpirationTime : null)));
1377                 }
1378
1379                 if (account.getProfileKey() != null) {
1380                     // Send our own profile key as well
1381                     out.write(new DeviceContact(account.getUsername(),
1382                             Optional.<String>absent(), Optional.<SignalServiceAttachmentStream>absent(),
1383                             Optional.<String>absent(), Optional.<VerifiedMessage>absent(),
1384                             Optional.of(account.getProfileKey()),
1385                             false, Optional.<Integer>absent()));
1386                 }
1387             }
1388
1389             if (contactsFile.exists() && contactsFile.length() > 0) {
1390                 try (FileInputStream contactsFileStream = new FileInputStream(contactsFile)) {
1391                     SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
1392                             .withStream(contactsFileStream)
1393                             .withContentType("application/octet-stream")
1394                             .withLength(contactsFile.length())
1395                             .build();
1396
1397                     sendSyncMessage(SignalServiceSyncMessage.forContacts(new ContactsMessage(attachmentStream, true)));
1398                 }
1399             }
1400         } finally {
1401             try {
1402                 Files.delete(contactsFile.toPath());
1403             } catch (IOException e) {
1404                 System.err.println("Failed to delete contacts temp file “" + contactsFile + "”: " + e.getMessage());
1405             }
1406         }
1407     }
1408
1409     private void sendVerifiedMessage(String destination, IdentityKey identityKey, TrustLevel trustLevel) throws IOException, UntrustedIdentityException {
1410         VerifiedMessage verifiedMessage = new VerifiedMessage(destination, identityKey, trustLevel.toVerifiedState(), System.currentTimeMillis());
1411         sendSyncMessage(SignalServiceSyncMessage.forVerified(verifiedMessage));
1412     }
1413
1414     public ContactInfo getContact(String number) {
1415         return account.getContactStore().getContact(number);
1416     }
1417
1418     public GroupInfo getGroup(byte[] groupId) {
1419         return account.getGroupStore().getGroup(groupId);
1420     }
1421
1422     public Map<String, List<JsonIdentityKeyStore.Identity>> getIdentities() {
1423         return account.getSignalProtocolStore().getIdentities();
1424     }
1425
1426     public List<JsonIdentityKeyStore.Identity> getIdentities(String number) {
1427         return account.getSignalProtocolStore().getIdentities(number);
1428     }
1429
1430     /**
1431      * Trust this the identity with this fingerprint
1432      *
1433      * @param name        username of the identity
1434      * @param fingerprint Fingerprint
1435      */
1436     public boolean trustIdentityVerified(String name, byte[] fingerprint) {
1437         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(name);
1438         if (ids == null) {
1439             return false;
1440         }
1441         for (JsonIdentityKeyStore.Identity id : ids) {
1442             if (!Arrays.equals(id.getIdentityKey().serialize(), fingerprint)) {
1443                 continue;
1444             }
1445
1446             account.getSignalProtocolStore().saveIdentity(name, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1447             try {
1448                 sendVerifiedMessage(name, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1449             } catch (IOException | UntrustedIdentityException e) {
1450                 e.printStackTrace();
1451             }
1452             account.save();
1453             return true;
1454         }
1455         return false;
1456     }
1457
1458     /**
1459      * Trust this the identity with this safety number
1460      *
1461      * @param name         username of the identity
1462      * @param safetyNumber Safety number
1463      */
1464     public boolean trustIdentityVerifiedSafetyNumber(String name, String safetyNumber) {
1465         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(name);
1466         if (ids == null) {
1467             return false;
1468         }
1469         for (JsonIdentityKeyStore.Identity id : ids) {
1470             if (!safetyNumber.equals(computeSafetyNumber(name, id.getIdentityKey()))) {
1471                 continue;
1472             }
1473
1474             account.getSignalProtocolStore().saveIdentity(name, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1475             try {
1476                 sendVerifiedMessage(name, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1477             } catch (IOException | UntrustedIdentityException e) {
1478                 e.printStackTrace();
1479             }
1480             account.save();
1481             return true;
1482         }
1483         return false;
1484     }
1485
1486     /**
1487      * Trust all keys of this identity without verification
1488      *
1489      * @param name username of the identity
1490      */
1491     public boolean trustIdentityAllKeys(String name) {
1492         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(name);
1493         if (ids == null) {
1494             return false;
1495         }
1496         for (JsonIdentityKeyStore.Identity id : ids) {
1497             if (id.getTrustLevel() == TrustLevel.UNTRUSTED) {
1498                 account.getSignalProtocolStore().saveIdentity(name, id.getIdentityKey(), TrustLevel.TRUSTED_UNVERIFIED);
1499                 try {
1500                     sendVerifiedMessage(name, id.getIdentityKey(), TrustLevel.TRUSTED_UNVERIFIED);
1501                 } catch (IOException | UntrustedIdentityException e) {
1502                     e.printStackTrace();
1503                 }
1504             }
1505         }
1506         account.save();
1507         return true;
1508     }
1509
1510     public String computeSafetyNumber(String theirUsername, IdentityKey theirIdentityKey) {
1511         return Utils.computeSafetyNumber(username, getIdentity(), theirUsername, theirIdentityKey);
1512     }
1513
1514     public interface ReceiveMessageHandler {
1515
1516         void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent decryptedContent, Throwable e);
1517     }
1518 }