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