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

   1 /*
   2   Copyright (C) 2015-2020 AsamK and contributors
   3
   4   This program is free software: you can redistribute it and/or modify
   5   it under the terms of the GNU General Public License as published by
   6   the Free Software Foundation, either version 3 of the License, or
   7   (at your option) any later version.
   8
   9   This program is distributed in the hope that it will be useful,
  10   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12   GNU General Public License for more details.
  13
  14   You should have received a copy of the GNU General Public License
  15   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17 package org.asamk.signal.manager;
  18
  19 import com.fasterxml.jackson.databind.ObjectMapper;
  20
  21 import org.asamk.Signal;
  22 import org.asamk.signal.AttachmentInvalidException;
  23 import org.asamk.signal.GroupNotFoundException;
  24 import org.asamk.signal.JsonStickerPack;
  25 import org.asamk.signal.NotAGroupMemberException;
  26 import org.asamk.signal.StickerPackInvalidException;
  27 import org.asamk.signal.TrustLevel;
  28 import org.asamk.signal.UserAlreadyExists;
  29 import org.asamk.signal.storage.SignalAccount;
  30 import org.asamk.signal.storage.contacts.ContactInfo;
  31 import org.asamk.signal.storage.groups.GroupInfo;
  32 import org.asamk.signal.storage.groups.JsonGroupStore;
  33 import org.asamk.signal.storage.protocol.JsonIdentityKeyStore;
  34 import org.asamk.signal.util.IOUtils;
  35 import org.asamk.signal.util.Util;
  36 import org.signal.libsignal.metadata.InvalidMetadataMessageException;
  37 import org.signal.libsignal.metadata.InvalidMetadataVersionException;
  38 import org.signal.libsignal.metadata.ProtocolDuplicateMessageException;
  39 import org.signal.libsignal.metadata.ProtocolInvalidKeyException;
  40 import org.signal.libsignal.metadata.ProtocolInvalidKeyIdException;
  41 import org.signal.libsignal.metadata.ProtocolInvalidMessageException;
  42 import org.signal.libsignal.metadata.ProtocolInvalidVersionException;
  43 import org.signal.libsignal.metadata.ProtocolLegacyMessageException;
  44 import org.signal.libsignal.metadata.ProtocolNoSessionException;
  45 import org.signal.libsignal.metadata.ProtocolUntrustedIdentityException;
  46 import org.signal.libsignal.metadata.SelfSendException;
  47 import org.signal.libsignal.metadata.certificate.InvalidCertificateException;
  48 import org.signal.zkgroup.InvalidInputException;
  49 import org.signal.zkgroup.VerificationFailedException;
  50 import org.signal.zkgroup.profiles.ProfileKey;
  51 import org.whispersystems.libsignal.IdentityKey;
  52 import org.whispersystems.libsignal.IdentityKeyPair;
  53 import org.whispersystems.libsignal.InvalidKeyException;
  54 import org.whispersystems.libsignal.InvalidMessageException;
  55 import org.whispersystems.libsignal.InvalidVersionException;
  56 import org.whispersystems.libsignal.ecc.Curve;
  57 import org.whispersystems.libsignal.ecc.ECKeyPair;
  58 import org.whispersystems.libsignal.ecc.ECPublicKey;
  59 import org.whispersystems.libsignal.state.PreKeyRecord;
  60 import org.whispersystems.libsignal.state.SignedPreKeyRecord;
  61 import org.whispersystems.libsignal.util.KeyHelper;
  62 import org.whispersystems.libsignal.util.Medium;
  63 import org.whispersystems.libsignal.util.Pair;
  64 import org.whispersystems.libsignal.util.guava.Optional;
  65 import org.whispersystems.signalservice.api.SignalServiceAccountManager;
  66 import org.whispersystems.signalservice.api.SignalServiceMessagePipe;
  67 import org.whispersystems.signalservice.api.SignalServiceMessageReceiver;
  68 import org.whispersystems.signalservice.api.SignalServiceMessageSender;
  69 import org.whispersystems.signalservice.api.crypto.InvalidCiphertextException;
  70 import org.whispersystems.signalservice.api.crypto.ProfileCipher;
  71 import org.whispersystems.signalservice.api.crypto.SignalServiceCipher;
  72 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccess;
  73 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccessPair;
  74 import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
  75 import org.whispersystems.signalservice.api.messages.SendMessageResult;
  76 import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
  77 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentPointer;
  78 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentStream;
  79 import org.whispersystems.signalservice.api.messages.SignalServiceContent;
  80 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
  81 import org.whispersystems.signalservice.api.messages.SignalServiceEnvelope;
  82 import org.whispersystems.signalservice.api.messages.SignalServiceGroup;
  83 import org.whispersystems.signalservice.api.messages.SignalServiceReceiptMessage;
  84 import org.whispersystems.signalservice.api.messages.SignalServiceStickerManifestUpload;
  85 import org.whispersystems.signalservice.api.messages.SignalServiceStickerManifestUpload.StickerInfo;
  86 import org.whispersystems.signalservice.api.messages.multidevice.BlockedListMessage;
  87 import org.whispersystems.signalservice.api.messages.multidevice.ContactsMessage;
  88 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContact;
  89 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContactsInputStream;
  90 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContactsOutputStream;
  91 import org.whispersystems.signalservice.api.messages.multidevice.DeviceGroup;
  92 import org.whispersystems.signalservice.api.messages.multidevice.DeviceGroupsInputStream;
  93 import org.whispersystems.signalservice.api.messages.multidevice.DeviceGroupsOutputStream;
  94 import org.whispersystems.signalservice.api.messages.multidevice.DeviceInfo;
  95 import org.whispersystems.signalservice.api.messages.multidevice.RequestMessage;
  96 import org.whispersystems.signalservice.api.messages.multidevice.SentTranscriptMessage;
  97 import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
  98 import org.whispersystems.signalservice.api.messages.multidevice.VerifiedMessage;
  99 import org.whispersystems.signalservice.api.profiles.SignalServiceProfile;
 100 import org.whispersystems.signalservice.api.push.ContactTokenDetails;
 101 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
 102 import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
 103 import org.whispersystems.signalservice.api.push.exceptions.NetworkFailureException;
 104 import org.whispersystems.signalservice.api.push.exceptions.UnregisteredUserException;
 105 import org.whispersystems.signalservice.api.util.InvalidNumberException;
 106 import org.whispersystems.signalservice.api.util.SleepTimer;
 107 import org.whispersystems.signalservice.api.util.StreamDetails;
 108 import org.whispersystems.signalservice.api.util.UptimeSleepTimer;
 109 import org.whispersystems.signalservice.internal.push.SignalServiceProtos;
 110 import org.whispersystems.signalservice.internal.push.UnsupportedDataMessageException;
 111 import org.whispersystems.signalservice.internal.util.Hex;
 112 import org.whispersystems.util.Base64;
 113
 114 import java.io.File;
 115 import java.io.FileInputStream;
 116 import java.io.FileNotFoundException;
 117 import java.io.FileOutputStream;
 118 import java.io.IOException;
 119 import java.io.InputStream;
 120 import java.io.OutputStream;
 121 import java.net.URI;
 122 import java.net.URISyntaxException;
 123 import java.net.URLEncoder;
 124 import java.nio.file.Files;
 125 import java.nio.file.Paths;
 126 import java.nio.file.StandardCopyOption;
 127 import java.util.ArrayList;
 128 import java.util.Arrays;
 129 import java.util.Collection;
 130 import java.util.Collections;
 131 import java.util.Date;
 132 import java.util.HashSet;
 133 import java.util.LinkedList;
 134 import java.util.List;
 135 import java.util.Locale;
 136 import java.util.Map;
 137 import java.util.Objects;
 138 import java.util.Set;
 139 import java.util.UUID;
 140 import java.util.concurrent.TimeUnit;
 141 import java.util.concurrent.TimeoutException;
 142 import java.util.zip.ZipEntry;
 143 import java.util.zip.ZipFile;
 144
 145 public class Manager implements Signal {
 146
 147     private static final SignalServiceProfile.Capabilities capabilities = new SignalServiceProfile.Capabilities(false, false);
 148
 149     private final String settingsPath;
 150     private final String dataPath;
 151     private final String attachmentsPath;
 152     private final String avatarsPath;
 153     private final SleepTimer timer = new UptimeSleepTimer();
 154
 155     private SignalAccount account;
 156     private String username;
 157     private SignalServiceAccountManager accountManager;
 158     private SignalServiceMessagePipe messagePipe = null;
 159     private SignalServiceMessagePipe unidentifiedMessagePipe = null;
 160
 161     public Manager(String username, String settingsPath) {
 162         this.username = username;
 163         this.settingsPath = settingsPath;
 164         this.dataPath = this.settingsPath + "/data";
 165         this.attachmentsPath = this.settingsPath + "/attachments";
 166         this.avatarsPath = this.settingsPath + "/avatars";
 167
 168     }
 169
 170     public String getUsername() {
 171         return username;
 172     }
 173
 174     public SignalServiceAddress getSelfAddress() {
 175         return account.getSelfAddress();
 176     }
 177
 178     private SignalServiceAccountManager getSignalServiceAccountManager() {
 179         return new SignalServiceAccountManager(BaseConfig.serviceConfiguration, account.getUuid(), account.getUsername(), account.getPassword(), account.getDeviceId(), BaseConfig.USER_AGENT, timer);
 180     }
 181
 182     private IdentityKey getIdentity() {
 183         return account.getSignalProtocolStore().getIdentityKeyPair().getPublicKey();
 184     }
 185
 186     public int getDeviceId() {
 187         return account.getDeviceId();
 188     }
 189
 190     private String getMessageCachePath() {
 191         return this.dataPath + "/" + username + ".d/msg-cache";
 192     }
 193
 194     private String getMessageCachePath(String sender) {
 195         return getMessageCachePath() + "/" + sender.replace("/", "_");
 196     }
 197
 198     private File getMessageCacheFile(String sender, long now, long timestamp) throws IOException {
 199         String cachePath = getMessageCachePath(sender);
 200         IOUtils.createPrivateDirectories(cachePath);
 201         return new File(cachePath + "/" + now + "_" + timestamp);
 202     }
 203
 204     public boolean userHasKeys() {
 205         return account != null && account.getSignalProtocolStore() != null;
 206     }
 207
 208     public void init() throws IOException {
 209         if (!SignalAccount.userExists(dataPath, username)) {
 210             return;
 211         }
 212         account = SignalAccount.load(dataPath, username);
 213
 214         migrateLegacyConfigs();
 215
 216         accountManager = getSignalServiceAccountManager();
 217         if (account.isRegistered()) {
 218             if (accountManager.getPreKeysCount() < BaseConfig.PREKEY_MINIMUM_COUNT) {
 219                 refreshPreKeys();
 220                 account.save();
 221             }
 222             if (account.getUuid() == null) {
 223                 account.setUuid(accountManager.getOwnUuid());
 224                 account.save();
 225             }
 226         }
 227     }
 228
 229     private void migrateLegacyConfigs() {
 230         // Copy group avatars that were previously stored in the attachments folder
 231         // to the new avatar folder
 232         if (JsonGroupStore.groupsWithLegacyAvatarId.size() > 0) {
 233             for (GroupInfo g : JsonGroupStore.groupsWithLegacyAvatarId) {
 234                 File avatarFile = getGroupAvatarFile(g.groupId);
 235                 File attachmentFile = getAttachmentFile(g.getAvatarId());
 236                 if (!avatarFile.exists() && attachmentFile.exists()) {
 237                     try {
 238                         IOUtils.createPrivateDirectories(avatarsPath);
 239                         Files.copy(attachmentFile.toPath(), avatarFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
 240                     } catch (Exception e) {
 241                         // Ignore
 242                     }
 243                 }
 244             }
 245             JsonGroupStore.groupsWithLegacyAvatarId.clear();
 246             account.save();
 247         }
 248         if (account.getProfileKey() == null) {
 249             // Old config file, creating new profile key
 250             account.setProfileKey(KeyUtils.createProfileKey());
 251             account.save();
 252         }
 253     }
 254
 255     private void createNewIdentity() throws IOException {
 256         IdentityKeyPair identityKey = KeyHelper.generateIdentityKeyPair();
 257         int registrationId = KeyHelper.generateRegistrationId(false);
 258         if (username == null) {
 259             account = SignalAccount.createTemporaryAccount(identityKey, registrationId);
 260         } else {
 261             account.getSignalProtocolStore().saveIdentity(username, identityKey.getPublicKey(), TrustLevel.TRUSTED_VERIFIED);
 262
 263             ProfileKey profileKey = KeyUtils.createProfileKey();
 264             account = SignalAccount.create(dataPath, username, identityKey, registrationId, profileKey);
 265             account.save();
 266         }
 267     }
 268
 269     public boolean isRegistered() {
 270         return account != null && account.isRegistered();
 271     }
 272
 273     public void register(boolean voiceVerification) throws IOException {
 274         if (account == null) {
 275             createNewIdentity();
 276         }
 277         account.setPassword(KeyUtils.createPassword());
 278         account.setUuid(null);
 279         accountManager = getSignalServiceAccountManager();
 280
 281         if (voiceVerification) {
 282             accountManager.requestVoiceVerificationCode(Locale.getDefault(), Optional.absent(), Optional.absent());
 283         } else {
 284             accountManager.requestSmsVerificationCode(false, Optional.absent(), Optional.absent());
 285         }
 286
 287         account.setRegistered(false);
 288         account.save();
 289     }
 290
 291     public void updateAccountAttributes() throws IOException {
 292         accountManager.setAccountAttributes(account.getSignalingKey(), account.getSignalProtocolStore().getLocalRegistrationId(), true, account.getRegistrationLockPin(), account.getRegistrationLock(), getSelfUnidentifiedAccessKey(), false, capabilities);
 293     }
 294
 295     public void setProfileName(String name) throws IOException {
 296         accountManager.setProfileName(account.getProfileKey(), name);
 297     }
 298
 299     public void setProfileAvatar(File avatar) throws IOException {
 300         final StreamDetails streamDetails = Utils.createStreamDetailsFromFile(avatar);
 301         accountManager.setProfileAvatar(account.getProfileKey(), streamDetails);
 302         streamDetails.getStream().close();
 303     }
 304
 305     public void removeProfileAvatar() throws IOException {
 306         accountManager.setProfileAvatar(account.getProfileKey(), null);
 307     }
 308
 309     public void unregister() throws IOException {
 310         // When setting an empty GCM id, the Signal-Server also sets the fetchesMessages property to false.
 311         // If this is the master device, other users can't send messages to this number anymore.
 312         // If this is a linked device, other users can still send messages, but this device doesn't receive them anymore.
 313         accountManager.setGcmId(Optional.absent());
 314
 315         account.setRegistered(false);
 316         account.save();
 317     }
 318
 319     public String getDeviceLinkUri() throws TimeoutException, IOException {
 320         if (account == null) {
 321             createNewIdentity();
 322         }
 323         account.setPassword(KeyUtils.createPassword());
 324         accountManager = getSignalServiceAccountManager();
 325         String uuid = accountManager.getNewDeviceUuid();
 326
 327         return Utils.createDeviceLinkUri(new Utils.DeviceLinkInfo(uuid, getIdentity().getPublicKey()));
 328     }
 329
 330     public void finishDeviceLink(String deviceName) throws IOException, InvalidKeyException, TimeoutException, UserAlreadyExists {
 331         account.setSignalingKey(KeyUtils.createSignalingKey());
 332         SignalServiceAccountManager.NewDeviceRegistrationReturn ret = accountManager.finishNewDeviceRegistration(account.getSignalProtocolStore().getIdentityKeyPair(), account.getSignalingKey(), false, true, account.getSignalProtocolStore().getLocalRegistrationId(), deviceName);
 333
 334         username = ret.getNumber();
 335         // TODO do this check before actually registering
 336         if (SignalAccount.userExists(dataPath, username)) {
 337             throw new UserAlreadyExists(username, SignalAccount.getFileName(dataPath, username));
 338         }
 339
 340         // Create new account with the synced identity
 341         byte[] profileKeyBytes = ret.getProfileKey();
 342         ProfileKey profileKey;
 343         if (profileKeyBytes == null) {
 344             profileKey = KeyUtils.createProfileKey();
 345         } else {
 346             try {
 347                 profileKey = new ProfileKey(profileKeyBytes);
 348             } catch (InvalidInputException e) {
 349                 throw new IOException("Received invalid profileKey", e);
 350             }
 351         }
 352         account = SignalAccount.createLinkedAccount(dataPath, username, ret.getUuid(), account.getPassword(), ret.getDeviceId(), ret.getIdentity(), account.getSignalProtocolStore().getLocalRegistrationId(), account.getSignalingKey(), profileKey);
 353
 354         refreshPreKeys();
 355
 356         requestSyncGroups();
 357         requestSyncContacts();
 358         requestSyncBlocked();
 359         requestSyncConfiguration();
 360
 361         account.save();
 362     }
 363
 364     public List<DeviceInfo> getLinkedDevices() throws IOException {
 365         List<DeviceInfo> devices = accountManager.getDevices();
 366         account.setMultiDevice(devices.size() > 1);
 367         account.save();
 368         return devices;
 369     }
 370
 371     public void removeLinkedDevices(int deviceId) throws IOException {
 372         accountManager.removeDevice(deviceId);
 373         List<DeviceInfo> devices = accountManager.getDevices();
 374         account.setMultiDevice(devices.size() > 1);
 375         account.save();
 376     }
 377
 378     public void addDeviceLink(URI linkUri) throws IOException, InvalidKeyException {
 379         Utils.DeviceLinkInfo info = Utils.parseDeviceLinkUri(linkUri);
 380
 381         addDevice(info.deviceIdentifier, info.deviceKey);
 382     }
 383
 384     private void addDevice(String deviceIdentifier, ECPublicKey deviceKey) throws IOException, InvalidKeyException {
 385         IdentityKeyPair identityKeyPair = account.getSignalProtocolStore().getIdentityKeyPair();
 386         String verificationCode = accountManager.getNewDeviceVerificationCode();
 387
 388         accountManager.addDevice(deviceIdentifier, deviceKey, identityKeyPair, Optional.of(account.getProfileKey().serialize()), verificationCode);
 389         account.setMultiDevice(true);
 390         account.save();
 391     }
 392
 393     private List<PreKeyRecord> generatePreKeys() {
 394         List<PreKeyRecord> records = new ArrayList<>(BaseConfig.PREKEY_BATCH_SIZE);
 395
 396         final int offset = account.getPreKeyIdOffset();
 397         for (int i = 0; i < BaseConfig.PREKEY_BATCH_SIZE; i++) {
 398             int preKeyId = (offset + i) % Medium.MAX_VALUE;
 399             ECKeyPair keyPair = Curve.generateKeyPair();
 400             PreKeyRecord record = new PreKeyRecord(preKeyId, keyPair);
 401
 402             records.add(record);
 403         }
 404
 405         account.addPreKeys(records);
 406         account.save();
 407
 408         return records;
 409     }
 410
 411     private SignedPreKeyRecord generateSignedPreKey(IdentityKeyPair identityKeyPair) {
 412         try {
 413             ECKeyPair keyPair = Curve.generateKeyPair();
 414             byte[] signature = Curve.calculateSignature(identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
 415             SignedPreKeyRecord record = new SignedPreKeyRecord(account.getNextSignedPreKeyId(), System.currentTimeMillis(), keyPair, signature);
 416
 417             account.addSignedPreKey(record);
 418             account.save();
 419
 420             return record;
 421         } catch (InvalidKeyException e) {
 422             throw new AssertionError(e);
 423         }
 424     }
 425
 426     public void verifyAccount(String verificationCode, String pin) throws IOException {
 427         verificationCode = verificationCode.replace("-", "");
 428         account.setSignalingKey(KeyUtils.createSignalingKey());
 429         // TODO make unrestricted unidentified access configurable
 430         UUID uuid = accountManager.verifyAccountWithCode(verificationCode, account.getSignalingKey(), account.getSignalProtocolStore().getLocalRegistrationId(), true, pin, null, getSelfUnidentifiedAccessKey(), false, capabilities);
 431
 432         //accountManager.setGcmId(Optional.of(GoogleCloudMessaging.getInstance(this).register(REGISTRATION_ID)));
 433         account.setRegistered(true);
 434         account.setUuid(uuid);
 435         account.setRegistrationLockPin(pin);
 436
 437         refreshPreKeys();
 438         account.save();
 439     }
 440
 441     public void setRegistrationLockPin(Optional<String> pin) throws IOException {
 442         if (pin.isPresent()) {
 443             account.setRegistrationLockPin(pin.get());
 444             throw new RuntimeException("Not implemented anymore, will be replaced with KBS");
 445         } else {
 446             account.setRegistrationLockPin(null);
 447             accountManager.removeV1Pin();
 448         }
 449         account.save();
 450     }
 451
 452     private void refreshPreKeys() throws IOException {
 453         List<PreKeyRecord> oneTimePreKeys = generatePreKeys();
 454         final IdentityKeyPair identityKeyPair = account.getSignalProtocolStore().getIdentityKeyPair();
 455         SignedPreKeyRecord signedPreKeyRecord = generateSignedPreKey(identityKeyPair);
 456
 457         accountManager.setPreKeys(getIdentity(), signedPreKeyRecord, oneTimePreKeys);
 458     }
 459
 460     private SignalServiceMessageReceiver getMessageReceiver() {
 461         return new SignalServiceMessageReceiver(BaseConfig.serviceConfiguration, account.getUuid(), account.getUsername(), account.getPassword(), account.getDeviceId(), account.getSignalingKey(), BaseConfig.USER_AGENT, null, timer);
 462     }
 463
 464     private SignalServiceMessageSender getMessageSender() {
 465         return new SignalServiceMessageSender(BaseConfig.serviceConfiguration, account.getUuid(), account.getUsername(), account.getPassword(),
 466                 account.getDeviceId(), account.getSignalProtocolStore(), BaseConfig.USER_AGENT, account.isMultiDevice(), Optional.fromNullable(messagePipe), Optional.fromNullable(unidentifiedMessagePipe), Optional.absent());
 467     }
 468
 469     private SignalServiceProfile getRecipientProfile(SignalServiceAddress address, Optional<UnidentifiedAccess> unidentifiedAccess) throws IOException {
 470         SignalServiceMessagePipe pipe = unidentifiedMessagePipe != null && unidentifiedAccess.isPresent() ? unidentifiedMessagePipe
 471                 : messagePipe;
 472
 473         if (pipe != null) {
 474             try {
 475                 return pipe.getProfile(address, Optional.absent(), unidentifiedAccess, SignalServiceProfile.RequestType.PROFILE).getProfile();
 476             } catch (IOException ignored) {
 477             }
 478         }
 479
 480         SignalServiceMessageReceiver receiver = getMessageReceiver();
 481         try {
 482             return receiver.retrieveProfile(address, Optional.absent(), unidentifiedAccess, SignalServiceProfile.RequestType.PROFILE).getProfile();
 483         } catch (VerificationFailedException e) {
 484             throw new AssertionError(e);
 485         }
 486     }
 487
 488     private Optional<SignalServiceAttachmentStream> createGroupAvatarAttachment(byte[] groupId) throws IOException {
 489         File file = getGroupAvatarFile(groupId);
 490         if (!file.exists()) {
 491             return Optional.absent();
 492         }
 493
 494         return Optional.of(Utils.createAttachment(file));
 495     }
 496
 497     private Optional<SignalServiceAttachmentStream> createContactAvatarAttachment(String number) throws IOException {
 498         File file = getContactAvatarFile(number);
 499         if (!file.exists()) {
 500             return Optional.absent();
 501         }
 502
 503         return Optional.of(Utils.createAttachment(file));
 504     }
 505
 506     private GroupInfo getGroupForSending(byte[] groupId) throws GroupNotFoundException, NotAGroupMemberException {
 507         GroupInfo g = account.getGroupStore().getGroup(groupId);
 508         if (g == null) {
 509             throw new GroupNotFoundException(groupId);
 510         }
 511         if (!g.isMember(account.getSelfAddress())) {
 512             throw new NotAGroupMemberException(groupId, g.name);
 513         }
 514         return g;
 515     }
 516
 517     public List<GroupInfo> getGroups() {
 518         return account.getGroupStore().getGroups();
 519     }
 520
 521     @Override
 522     public void sendGroupMessage(String messageText, List<String> attachments,
 523                                  byte[] groupId)
 524             throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 525         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 526         if (attachments != null) {
 527             messageBuilder.withAttachments(Utils.getSignalServiceAttachments(attachments));
 528         }
 529         if (groupId != null) {
 530             SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.DELIVER)
 531                     .withId(groupId)
 532                     .build();
 533             messageBuilder.asGroupMessage(group);
 534         }
 535
 536         final GroupInfo g = getGroupForSending(groupId);
 537
 538         messageBuilder.withExpiration(g.messageExpirationTime);
 539
 540         sendMessageLegacy(messageBuilder, g.getMembersWithout(account.getSelfAddress()));
 541     }
 542
 543     public void sendGroupMessageReaction(String emoji, boolean remove, SignalServiceAddress targetAuthor,
 544                                          long targetSentTimestamp, byte[] groupId)
 545             throws IOException, EncapsulatedExceptions, AttachmentInvalidException {
 546         SignalServiceDataMessage.Reaction reaction = new SignalServiceDataMessage.Reaction(emoji, remove, targetAuthor, targetSentTimestamp);
 547         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 548                 .withReaction(reaction);
 549         if (groupId != null) {
 550             SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.DELIVER)
 551                     .withId(groupId)
 552                     .build();
 553             messageBuilder.asGroupMessage(group);
 554         }
 555         final GroupInfo g = getGroupForSending(groupId);
 556         sendMessageLegacy(messageBuilder, g.getMembersWithout(account.getSelfAddress()));
 557     }
 558
 559     public void sendQuitGroupMessage(byte[] groupId) throws GroupNotFoundException, IOException, EncapsulatedExceptions {
 560         SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
 561                 .withId(groupId)
 562                 .build();
 563
 564         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 565                 .asGroupMessage(group);
 566
 567         final GroupInfo g = getGroupForSending(groupId);
 568         g.removeMember(account.getSelfAddress());
 569         account.getGroupStore().updateGroup(g);
 570
 571         sendMessageLegacy(messageBuilder, g.getMembersWithout(account.getSelfAddress()));
 572     }
 573
 574     private byte[] sendUpdateGroupMessage(byte[] groupId, String name, Collection<SignalServiceAddress> members, String avatarFile) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 575         GroupInfo g;
 576         if (groupId == null) {
 577             // Create new group
 578             g = new GroupInfo(KeyUtils.createGroupId());
 579             g.addMembers(Collections.singleton(account.getSelfAddress()));
 580         } else {
 581             g = getGroupForSending(groupId);
 582         }
 583
 584         if (name != null) {
 585             g.name = name;
 586         }
 587
 588         if (members != null) {
 589             final Set<String> newE164Members = new HashSet<>();
 590             for (SignalServiceAddress member : members) {
 591                 if (g.isMember(member) || !member.getNumber().isPresent()) {
 592                     continue;
 593                 }
 594                 newE164Members.add(member.getNumber().get());
 595             }
 596
 597             final List<ContactTokenDetails> contacts = accountManager.getContacts(newE164Members);
 598             if (contacts.size() != newE164Members.size()) {
 599                 // Some of the new members are not registered on Signal
 600                 for (ContactTokenDetails contact : contacts) {
 601                     newE164Members.remove(contact.getNumber());
 602                 }
 603                 System.err.println("Failed to add members " + Util.join(", ", newE164Members) + " to group: Not registered on Signal");
 604                 System.err.println("Aborting…");
 605                 System.exit(1);
 606             }
 607
 608             g.addMembers(members);
 609         }
 610
 611         if (avatarFile != null) {
 612             IOUtils.createPrivateDirectories(avatarsPath);
 613             File aFile = getGroupAvatarFile(g.groupId);
 614             Files.copy(Paths.get(avatarFile), aFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
 615         }
 616
 617         account.getGroupStore().updateGroup(g);
 618
 619         SignalServiceDataMessage.Builder messageBuilder = getGroupUpdateMessageBuilder(g);
 620
 621         sendMessageLegacy(messageBuilder, g.getMembersWithout(account.getSelfAddress()));
 622         return g.groupId;
 623     }
 624
 625     private void sendUpdateGroupMessage(byte[] groupId, SignalServiceAddress recipient) throws IOException, EncapsulatedExceptions {
 626         if (groupId == null) {
 627             return;
 628         }
 629         GroupInfo g = getGroupForSending(groupId);
 630
 631         if (!g.isMember(recipient)) {
 632             return;
 633         }
 634
 635         SignalServiceDataMessage.Builder messageBuilder = getGroupUpdateMessageBuilder(g);
 636
 637         // Send group message only to the recipient who requested it
 638         sendMessageLegacy(messageBuilder, Collections.singleton(recipient));
 639     }
 640
 641     private SignalServiceDataMessage.Builder getGroupUpdateMessageBuilder(GroupInfo g) {
 642         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.UPDATE)
 643                 .withId(g.groupId)
 644                 .withName(g.name)
 645                 .withMembers(new ArrayList<>(g.getMembers()));
 646
 647         File aFile = getGroupAvatarFile(g.groupId);
 648         if (aFile.exists()) {
 649             try {
 650                 group.withAvatar(Utils.createAttachment(aFile));
 651             } catch (IOException e) {
 652                 throw new AttachmentInvalidException(aFile.toString(), e);
 653             }
 654         }
 655
 656         return SignalServiceDataMessage.newBuilder()
 657                 .asGroupMessage(group.build())
 658                 .withExpiration(g.messageExpirationTime);
 659     }
 660
 661     private void sendGroupInfoRequest(byte[] groupId, SignalServiceAddress recipient) throws IOException, EncapsulatedExceptions {
 662         if (groupId == null) {
 663             return;
 664         }
 665
 666         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.REQUEST_INFO)
 667                 .withId(groupId);
 668
 669         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 670                 .asGroupMessage(group.build());
 671
 672         // Send group info request message to the recipient who sent us a message with this groupId
 673         sendMessageLegacy(messageBuilder, Collections.singleton(recipient));
 674     }
 675
 676     private void sendReceipt(SignalServiceAddress remoteAddress, long messageId) throws IOException, UntrustedIdentityException {
 677         SignalServiceReceiptMessage receiptMessage = new SignalServiceReceiptMessage(SignalServiceReceiptMessage.Type.DELIVERY,
 678                 Collections.singletonList(messageId),
 679                 System.currentTimeMillis());
 680
 681         getMessageSender().sendReceipt(remoteAddress, getAccessFor(remoteAddress), receiptMessage);
 682     }
 683
 684     @Override
 685     public void sendMessage(String message, List<String> attachments, String recipient)
 686             throws EncapsulatedExceptions, AttachmentInvalidException, IOException, InvalidNumberException {
 687         List<String> recipients = new ArrayList<>(1);
 688         recipients.add(recipient);
 689         sendMessage(message, attachments, recipients);
 690     }
 691
 692     @Override
 693     public void sendMessage(String messageText, List<String> attachments,
 694                             List<String> recipients)
 695             throws IOException, EncapsulatedExceptions, AttachmentInvalidException, InvalidNumberException {
 696         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 697         if (attachments != null) {
 698             List<SignalServiceAttachment> attachmentStreams = Utils.getSignalServiceAttachments(attachments);
 699
 700             // Upload attachments here, so we only upload once even for multiple recipients
 701             SignalServiceMessageSender messageSender = getMessageSender();
 702             List<SignalServiceAttachment> attachmentPointers = new ArrayList<>(attachmentStreams.size());
 703             for (SignalServiceAttachment attachment : attachmentStreams) {
 704                 if (attachment.isStream()) {
 705                     attachmentPointers.add(messageSender.uploadAttachment(attachment.asStream()));
 706                 } else if (attachment.isPointer()) {
 707                     attachmentPointers.add(attachment.asPointer());
 708                 }
 709             }
 710
 711             messageBuilder.withAttachments(attachmentPointers);
 712         }
 713         sendMessageLegacy(messageBuilder, getSignalServiceAddresses(recipients));
 714     }
 715
 716     public void sendMessageReaction(String emoji, boolean remove, SignalServiceAddress targetAuthor,
 717                                     long targetSentTimestamp, List<String> recipients)
 718             throws IOException, EncapsulatedExceptions, AttachmentInvalidException, InvalidNumberException {
 719         SignalServiceDataMessage.Reaction reaction = new SignalServiceDataMessage.Reaction(emoji, remove, targetAuthor, targetSentTimestamp);
 720         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 721                 .withReaction(reaction);
 722         sendMessageLegacy(messageBuilder, getSignalServiceAddresses(recipients));
 723     }
 724
 725     @Override
 726     public void sendEndSessionMessage(List<String> recipients) throws IOException, EncapsulatedExceptions, InvalidNumberException {
 727         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 728                 .asEndSessionMessage();
 729
 730         sendMessageLegacy(messageBuilder, getSignalServiceAddresses(recipients));
 731     }
 732
 733     @Override
 734     public String getContactName(String number) throws InvalidNumberException {
 735         String canonicalizedNumber = Utils.canonicalizeNumber(number, account.getUsername());
 736         ContactInfo contact = account.getContactStore().getContact(new SignalServiceAddress(null, canonicalizedNumber));
 737         if (contact == null) {
 738             return "";
 739         } else {
 740             return contact.name;
 741         }
 742     }
 743
 744     @Override
 745     public void setContactName(String number, String name) throws InvalidNumberException {
 746         String canonicalizedNumber = Utils.canonicalizeNumber(number, account.getUsername());
 747         final SignalServiceAddress address = new SignalServiceAddress(null, canonicalizedNumber);
 748         ContactInfo contact = account.getContactStore().getContact(address);
 749         if (contact == null) {
 750             contact = new ContactInfo(address);
 751             System.err.println("Add contact " + canonicalizedNumber + " named " + name);
 752         } else {
 753             System.err.println("Updating contact " + canonicalizedNumber + " name " + contact.name + " -> " + name);
 754         }
 755         contact.name = name;
 756         account.getContactStore().updateContact(contact);
 757         account.save();
 758     }
 759
 760     @Override
 761     public void setContactBlocked(String number, boolean blocked) throws InvalidNumberException {
 762         number = Utils.canonicalizeNumber(number, account.getUsername());
 763         final SignalServiceAddress address = new SignalServiceAddress(null, number);
 764         ContactInfo contact = account.getContactStore().getContact(address);
 765         if (contact == null) {
 766             contact = new ContactInfo(address);
 767             System.err.println("Adding and " + (blocked ? "blocking" : "unblocking") + " contact " + number);
 768         } else {
 769             System.err.println((blocked ? "Blocking" : "Unblocking") + " contact " + number);
 770         }
 771         contact.blocked = blocked;
 772         account.getContactStore().updateContact(contact);
 773         account.save();
 774     }
 775
 776     @Override
 777     public void setGroupBlocked(final byte[] groupId, final boolean blocked) throws GroupNotFoundException {
 778         GroupInfo group = getGroup(groupId);
 779         if (group == null) {
 780             throw new GroupNotFoundException(groupId);
 781         } else {
 782             System.err.println((blocked ? "Blocking" : "Unblocking") + " group " + Base64.encodeBytes(groupId));
 783             group.blocked = blocked;
 784             account.getGroupStore().updateGroup(group);
 785             account.save();
 786         }
 787     }
 788
 789     @Override
 790     public List<byte[]> getGroupIds() {
 791         List<GroupInfo> groups = getGroups();
 792         List<byte[]> ids = new ArrayList<>(groups.size());
 793         for (GroupInfo group : groups) {
 794             ids.add(group.groupId);
 795         }
 796         return ids;
 797     }
 798
 799     @Override
 800     public String getGroupName(byte[] groupId) {
 801         GroupInfo group = getGroup(groupId);
 802         if (group == null) {
 803             return "";
 804         } else {
 805             return group.name;
 806         }
 807     }
 808
 809     @Override
 810     public List<String> getGroupMembers(byte[] groupId) {
 811         GroupInfo group = getGroup(groupId);
 812         if (group == null) {
 813             return Collections.emptyList();
 814         } else {
 815             return new ArrayList<>(group.getMembersE164());
 816         }
 817     }
 818
 819     @Override
 820     public byte[] updateGroup(byte[] groupId, String name, List<String> members, String avatar) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException, InvalidNumberException {
 821         if (groupId.length == 0) {
 822             groupId = null;
 823         }
 824         if (name.isEmpty()) {
 825             name = null;
 826         }
 827         if (members.size() == 0) {
 828             members = null;
 829         }
 830         if (avatar.isEmpty()) {
 831             avatar = null;
 832         }
 833         return sendUpdateGroupMessage(groupId, name, members == null ? null : getSignalServiceAddresses(members), avatar);
 834     }
 835
 836     /**
 837      * Change the expiration timer for a contact
 838      */
 839     public void setExpirationTimer(SignalServiceAddress address, int messageExpirationTimer) {
 840         ContactInfo c = account.getContactStore().getContact(address);
 841         c.messageExpirationTime = messageExpirationTimer;
 842         account.getContactStore().updateContact(c);
 843     }
 844
 845     /**
 846      * Change the expiration timer for a group
 847      */
 848     public void setExpirationTimer(byte[] groupId, int messageExpirationTimer) {
 849         GroupInfo g = account.getGroupStore().getGroup(groupId);
 850         g.messageExpirationTime = messageExpirationTimer;
 851         account.getGroupStore().updateGroup(g);
 852     }
 853
 854     /**
 855      * Upload the sticker pack from path.
 856      *
 857      * @param path Path can be a path to a manifest.json file or to a zip file that contains a manifest.json file
 858      * @return if successful, returns the URL to install the sticker pack in the signal app
 859      */
 860     public String uploadStickerPack(String path) throws IOException, StickerPackInvalidException {
 861         SignalServiceStickerManifestUpload manifest = getSignalServiceStickerManifestUpload(path);
 862
 863         SignalServiceMessageSender messageSender = getMessageSender();
 864
 865         byte[] packKey = KeyUtils.createStickerUploadKey();
 866         String packId = messageSender.uploadStickerManifest(manifest, packKey);
 867
 868         try {
 869             return new URI("https", "signal.art", "/addstickers/", "pack_id=" + URLEncoder.encode(packId, "utf-8") + "&pack_key=" + URLEncoder.encode(Hex.toStringCondensed(packKey), "utf-8"))
 870                     .toString();
 871         } catch (URISyntaxException e) {
 872             throw new AssertionError(e);
 873         }
 874     }
 875
 876     private SignalServiceStickerManifestUpload getSignalServiceStickerManifestUpload(final String path) throws IOException, StickerPackInvalidException {
 877         ZipFile zip = null;
 878         String rootPath = null;
 879
 880         final File file = new File(path);
 881         if (file.getName().endsWith(".zip")) {
 882             zip = new ZipFile(file);
 883         } else if (file.getName().equals("manifest.json")) {
 884             rootPath = file.getParent();
 885         } else {
 886             throw new StickerPackInvalidException("Could not find manifest.json");
 887         }
 888
 889         JsonStickerPack pack = parseStickerPack(rootPath, zip);
 890
 891         if (pack.stickers == null) {
 892             throw new StickerPackInvalidException("Must set a 'stickers' field.");
 893         }
 894
 895         if (pack.stickers.isEmpty()) {
 896             throw new StickerPackInvalidException("Must include stickers.");
 897         }
 898
 899         List<StickerInfo> stickers = new ArrayList<>(pack.stickers.size());
 900         for (JsonStickerPack.JsonSticker sticker : pack.stickers) {
 901             if (sticker.file == null) {
 902                 throw new StickerPackInvalidException("Must set a 'file' field on each sticker.");
 903             }
 904
 905             Pair<InputStream, Long> data;
 906             try {
 907                 data = getInputStreamAndLength(rootPath, zip, sticker.file);
 908             } catch (IOException ignored) {
 909                 throw new StickerPackInvalidException("Could not find find " + sticker.file);
 910             }
 911
 912             StickerInfo stickerInfo = new StickerInfo(data.first(), data.second(), Optional.fromNullable(sticker.emoji).or(""));
 913             stickers.add(stickerInfo);
 914         }
 915
 916         StickerInfo cover = null;
 917         if (pack.cover != null) {
 918             if (pack.cover.file == null) {
 919                 throw new StickerPackInvalidException("Must set a 'file' field on the cover.");
 920             }
 921
 922             Pair<InputStream, Long> data;
 923             try {
 924                 data = getInputStreamAndLength(rootPath, zip, pack.cover.file);
 925             } catch (IOException ignored) {
 926                 throw new StickerPackInvalidException("Could not find find " + pack.cover.file);
 927             }
 928
 929             cover = new StickerInfo(data.first(), data.second(), Optional.fromNullable(pack.cover.emoji).or(""));
 930         }
 931
 932         return new SignalServiceStickerManifestUpload(
 933                 pack.title,
 934                 pack.author,
 935                 cover,
 936                 stickers);
 937     }
 938
 939     private static JsonStickerPack parseStickerPack(String rootPath, ZipFile zip) throws IOException {
 940         InputStream inputStream;
 941         if (zip != null) {
 942             inputStream = zip.getInputStream(zip.getEntry("manifest.json"));
 943         } else {
 944             inputStream = new FileInputStream((new File(rootPath, "manifest.json")));
 945         }
 946         return new ObjectMapper().readValue(inputStream, JsonStickerPack.class);
 947     }
 948
 949     private static Pair<InputStream, Long> getInputStreamAndLength(final String rootPath, final ZipFile zip, final String subfile) throws IOException {
 950         if (zip != null) {
 951             final ZipEntry entry = zip.getEntry(subfile);
 952             return new Pair<>(zip.getInputStream(entry), entry.getSize());
 953         } else {
 954             final File file = new File(rootPath, subfile);
 955             return new Pair<>(new FileInputStream(file), file.length());
 956         }
 957     }
 958
 959     private void requestSyncGroups() throws IOException {
 960         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.GROUPS).build();
 961         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 962         try {
 963             sendSyncMessage(message);
 964         } catch (UntrustedIdentityException e) {
 965             e.printStackTrace();
 966         }
 967     }
 968
 969     private void requestSyncContacts() throws IOException {
 970         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONTACTS).build();
 971         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 972         try {
 973             sendSyncMessage(message);
 974         } catch (UntrustedIdentityException e) {
 975             e.printStackTrace();
 976         }
 977     }
 978
 979     private void requestSyncBlocked() throws IOException {
 980         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.BLOCKED).build();
 981         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 982         try {
 983             sendSyncMessage(message);
 984         } catch (UntrustedIdentityException e) {
 985             e.printStackTrace();
 986         }
 987     }
 988
 989     private void requestSyncConfiguration() throws IOException {
 990         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONFIGURATION).build();
 991         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 992         try {
 993             sendSyncMessage(message);
 994         } catch (UntrustedIdentityException e) {
 995             e.printStackTrace();
 996         }
 997     }
 998
 999     private byte[] getSenderCertificate() throws IOException {
1000         byte[] certificate = accountManager.getSenderCertificate();
1001         // TODO cache for a day
1002         return certificate;
1003     }
1004
1005     private byte[] getSelfUnidentifiedAccessKey() {
1006         return UnidentifiedAccess.deriveAccessKeyFrom(account.getProfileKey());
1007     }
1008
1009     private static SignalProfile decryptProfile(SignalServiceProfile encryptedProfile, ProfileKey profileKey) throws IOException {
1010         ProfileCipher profileCipher = new ProfileCipher(profileKey);
1011         try {
1012             return new SignalProfile(
1013                     encryptedProfile.getIdentityKey(),
1014                     encryptedProfile.getName() == null ? null : new String(profileCipher.decryptName(Base64.decode(encryptedProfile.getName()))),
1015                     encryptedProfile.getAvatar(),
1016                     encryptedProfile.getUnidentifiedAccess() == null || !profileCipher.verifyUnidentifiedAccess(Base64.decode(encryptedProfile.getUnidentifiedAccess())) ? null : encryptedProfile.getUnidentifiedAccess(),
1017                     encryptedProfile.isUnrestrictedUnidentifiedAccess()
1018             );
1019         } catch (InvalidCiphertextException e) {
1020             return null;
1021         }
1022     }
1023
1024     private byte[] getTargetUnidentifiedAccessKey(SignalServiceAddress recipient) throws IOException {
1025         ContactInfo contact = account.getContactStore().getContact(recipient);
1026         if (contact == null || contact.profileKey == null) {
1027             return null;
1028         }
1029         ProfileKey theirProfileKey;
1030         try {
1031             theirProfileKey = new ProfileKey(Base64.decode(contact.profileKey));
1032         } catch (InvalidInputException e) {
1033             throw new AssertionError(e);
1034         }
1035         SignalProfile targetProfile = decryptProfile(getRecipientProfile(recipient, Optional.absent()), theirProfileKey);
1036
1037         if (targetProfile == null || targetProfile.getUnidentifiedAccess() == null) {
1038             return null;
1039         }
1040
1041         if (targetProfile.isUnrestrictedUnidentifiedAccess()) {
1042             return KeyUtils.createUnrestrictedUnidentifiedAccess();
1043         }
1044
1045         return UnidentifiedAccess.deriveAccessKeyFrom(theirProfileKey);
1046     }
1047
1048     private Optional<UnidentifiedAccessPair> getAccessForSync() throws IOException {
1049         byte[] selfUnidentifiedAccessKey = getSelfUnidentifiedAccessKey();
1050         byte[] selfUnidentifiedAccessCertificate = getSenderCertificate();
1051
1052         if (selfUnidentifiedAccessKey == null || selfUnidentifiedAccessCertificate == null) {
1053             return Optional.absent();
1054         }
1055
1056         try {
1057             return Optional.of(new UnidentifiedAccessPair(
1058                     new UnidentifiedAccess(selfUnidentifiedAccessKey, selfUnidentifiedAccessCertificate),
1059                     new UnidentifiedAccess(selfUnidentifiedAccessKey, selfUnidentifiedAccessCertificate)
1060             ));
1061         } catch (InvalidCertificateException e) {
1062             return Optional.absent();
1063         }
1064     }
1065
1066     private List<Optional<UnidentifiedAccessPair>> getAccessFor(Collection<SignalServiceAddress> recipients) throws IOException {
1067         List<Optional<UnidentifiedAccessPair>> result = new ArrayList<>(recipients.size());
1068         for (SignalServiceAddress recipient : recipients) {
1069             result.add(getAccessFor(recipient));
1070         }
1071         return result;
1072     }
1073
1074     private Optional<UnidentifiedAccessPair> getAccessFor(SignalServiceAddress recipient) throws IOException {
1075         byte[] recipientUnidentifiedAccessKey = getTargetUnidentifiedAccessKey(recipient);
1076         byte[] selfUnidentifiedAccessKey = getSelfUnidentifiedAccessKey();
1077         byte[] selfUnidentifiedAccessCertificate = getSenderCertificate();
1078
1079         if (recipientUnidentifiedAccessKey == null || selfUnidentifiedAccessKey == null || selfUnidentifiedAccessCertificate == null) {
1080             return Optional.absent();
1081         }
1082
1083         try {
1084             return Optional.of(new UnidentifiedAccessPair(
1085                     new UnidentifiedAccess(recipientUnidentifiedAccessKey, selfUnidentifiedAccessCertificate),
1086                     new UnidentifiedAccess(selfUnidentifiedAccessKey, selfUnidentifiedAccessCertificate)
1087             ));
1088         } catch (InvalidCertificateException e) {
1089             return Optional.absent();
1090         }
1091     }
1092
1093     private void sendSyncMessage(SignalServiceSyncMessage message)
1094             throws IOException, UntrustedIdentityException {
1095         SignalServiceMessageSender messageSender = getMessageSender();
1096         try {
1097             messageSender.sendMessage(message, getAccessForSync());
1098         } catch (UntrustedIdentityException e) {
1099             account.getSignalProtocolStore().saveIdentity(e.getIdentifier(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
1100             throw e;
1101         }
1102     }
1103
1104     /**
1105      * This method throws an EncapsulatedExceptions exception instead of returning a list of SendMessageResult.
1106      */
1107     private void sendMessageLegacy(SignalServiceDataMessage.Builder messageBuilder, Collection<SignalServiceAddress> recipients)
1108             throws EncapsulatedExceptions, IOException {
1109         List<SendMessageResult> results = sendMessage(messageBuilder, recipients);
1110
1111         List<UntrustedIdentityException> untrustedIdentities = new LinkedList<>();
1112         List<UnregisteredUserException> unregisteredUsers = new LinkedList<>();
1113         List<NetworkFailureException> networkExceptions = new LinkedList<>();
1114
1115         for (SendMessageResult result : results) {
1116             if (result.isUnregisteredFailure()) {
1117                 unregisteredUsers.add(new UnregisteredUserException(result.getAddress().getNumber().get(), null));
1118             } else if (result.isNetworkFailure()) {
1119                 networkExceptions.add(new NetworkFailureException(result.getAddress().getNumber().get(), null));
1120             } else if (result.getIdentityFailure() != null) {
1121                 untrustedIdentities.add(new UntrustedIdentityException("Untrusted", result.getAddress().getNumber().get(), result.getIdentityFailure().getIdentityKey()));
1122             }
1123         }
1124         if (!untrustedIdentities.isEmpty() || !unregisteredUsers.isEmpty() || !networkExceptions.isEmpty()) {
1125             throw new EncapsulatedExceptions(untrustedIdentities, unregisteredUsers, networkExceptions);
1126         }
1127     }
1128
1129     private Collection<SignalServiceAddress> getSignalServiceAddresses(Collection<String> numbers) throws InvalidNumberException {
1130         final Set<SignalServiceAddress> signalServiceAddresses = new HashSet<>(numbers.size());
1131         final String username = account.getUsername();
1132
1133         for (String number : numbers) {
1134             String canonicalizedNumber = Utils.canonicalizeNumber(number, username);
1135             if (canonicalizedNumber.equals(username)) {
1136                 signalServiceAddresses.add(account.getSelfAddress());
1137             } else {
1138                 SignalServiceAddress address = new SignalServiceAddress(null, canonicalizedNumber);
1139                 ContactInfo contact = account.getContactStore().getContact(address);
1140                 signalServiceAddresses.add(contact == null
1141                         ? address
1142                         : contact.getAddress());
1143             }
1144         }
1145         return signalServiceAddresses;
1146     }
1147
1148     private List<SendMessageResult> sendMessage(SignalServiceDataMessage.Builder messageBuilder, Collection<SignalServiceAddress> recipients)
1149             throws IOException {
1150         if (messagePipe == null) {
1151             messagePipe = getMessageReceiver().createMessagePipe();
1152         }
1153         if (unidentifiedMessagePipe == null) {
1154             unidentifiedMessagePipe = getMessageReceiver().createUnidentifiedMessagePipe();
1155         }
1156         SignalServiceDataMessage message = null;
1157         try {
1158             SignalServiceMessageSender messageSender = getMessageSender();
1159
1160             message = messageBuilder.build();
1161             if (message.getGroupInfo().isPresent()) {
1162                 try {
1163                     final boolean isRecipientUpdate = false;
1164                     List<SendMessageResult> result = messageSender.sendMessage(new ArrayList<>(recipients), getAccessFor(recipients), isRecipientUpdate, message);
1165                     for (SendMessageResult r : result) {
1166                         if (r.getIdentityFailure() != null) {
1167                             account.getSignalProtocolStore().saveIdentity(r.getAddress().getNumber().get(), r.getIdentityFailure().getIdentityKey(), TrustLevel.UNTRUSTED);
1168                         }
1169                     }
1170                     return result;
1171                 } catch (UntrustedIdentityException e) {
1172                     account.getSignalProtocolStore().saveIdentity(e.getIdentifier(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
1173                     return Collections.emptyList();
1174                 }
1175             } else if (recipients.size() == 1 && recipients.contains(account.getSelfAddress())) {
1176                 SignalServiceAddress recipient = account.getSelfAddress();
1177                 final Optional<UnidentifiedAccessPair> unidentifiedAccess = getAccessFor(recipient);
1178                 SentTranscriptMessage transcript = new SentTranscriptMessage(Optional.of(recipient),
1179                         message.getTimestamp(),
1180                         message,
1181                         message.getExpiresInSeconds(),
1182                         Collections.singletonMap(recipient, unidentifiedAccess.isPresent()),
1183                         false);
1184                 SignalServiceSyncMessage syncMessage = SignalServiceSyncMessage.forSentTranscript(transcript);
1185
1186                 List<SendMessageResult> results = new ArrayList<>(recipients.size());
1187                 try {
1188                     messageSender.sendMessage(syncMessage, unidentifiedAccess);
1189                 } catch (UntrustedIdentityException e) {
1190                     account.getSignalProtocolStore().saveIdentity(e.getIdentifier(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
1191                     results.add(SendMessageResult.identityFailure(recipient, e.getIdentityKey()));
1192                 }
1193                 return results;
1194             } else {
1195                 // Send to all individually, so sync messages are sent correctly
1196                 List<SendMessageResult> results = new ArrayList<>(recipients.size());
1197                 for (SignalServiceAddress address : recipients) {
1198                     ContactInfo contact = account.getContactStore().getContact(address);
1199                     if (contact != null) {
1200                         messageBuilder.withExpiration(contact.messageExpirationTime);
1201                         messageBuilder.withProfileKey(account.getProfileKey().serialize());
1202                     } else {
1203                         messageBuilder.withExpiration(0);
1204                         messageBuilder.withProfileKey(null);
1205                     }
1206                     message = messageBuilder.build();
1207                     try {
1208                         SendMessageResult result = messageSender.sendMessage(address, getAccessFor(address), message);
1209                         results.add(result);
1210                     } catch (UntrustedIdentityException e) {
1211                         account.getSignalProtocolStore().saveIdentity(e.getIdentifier(), e.getIdentityKey(), TrustLevel.UNTRUSTED);
1212                         results.add(SendMessageResult.identityFailure(address, e.getIdentityKey()));
1213                     }
1214                 }
1215                 return results;
1216             }
1217         } finally {
1218             if (message != null && message.isEndSession()) {
1219                 for (SignalServiceAddress recipient : recipients) {
1220                     handleEndSession(recipient.getNumber().get());
1221                 }
1222             }
1223             account.save();
1224         }
1225     }
1226
1227     private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) throws InvalidMetadataMessageException, ProtocolInvalidMessageException, ProtocolDuplicateMessageException, ProtocolLegacyMessageException, ProtocolInvalidKeyIdException, InvalidMetadataVersionException, ProtocolInvalidVersionException, ProtocolNoSessionException, ProtocolInvalidKeyException, ProtocolUntrustedIdentityException, SelfSendException, UnsupportedDataMessageException {
1228         SignalServiceCipher cipher = new SignalServiceCipher(account.getSelfAddress(), account.getSignalProtocolStore(), Utils.getCertificateValidator());
1229         try {
1230             return cipher.decrypt(envelope);
1231         } catch (ProtocolUntrustedIdentityException e) {
1232             // TODO We don't get the new untrusted identity from ProtocolUntrustedIdentityException anymore ... we need to get it from somewhere else
1233 //            account.getSignalProtocolStore().saveIdentity(e.getSender(), e.getUntrustedIdentity(), TrustLevel.UNTRUSTED);
1234             throw e;
1235         }
1236     }
1237
1238     private void handleEndSession(String source) {
1239         account.getSignalProtocolStore().deleteAllSessions(source);
1240     }
1241
1242     private void handleSignalServiceDataMessage(SignalServiceDataMessage message, boolean isSync, SignalServiceAddress source, SignalServiceAddress destination, boolean ignoreAttachments) {
1243         if (message.getGroupInfo().isPresent()) {
1244             SignalServiceGroup groupInfo = message.getGroupInfo().get();
1245             GroupInfo group = account.getGroupStore().getGroup(groupInfo.getGroupId());
1246             switch (groupInfo.getType()) {
1247                 case UPDATE:
1248                     if (group == null) {
1249                         group = new GroupInfo(groupInfo.getGroupId());
1250                     }
1251
1252                     if (groupInfo.getAvatar().isPresent()) {
1253                         SignalServiceAttachment avatar = groupInfo.getAvatar().get();
1254                         if (avatar.isPointer()) {
1255                             try {
1256                                 retrieveGroupAvatarAttachment(avatar.asPointer(), group.groupId);
1257                             } catch (IOException | InvalidMessageException e) {
1258                                 System.err.println("Failed to retrieve group avatar (" + avatar.asPointer().getId() + "): " + e.getMessage());
1259                             }
1260                         }
1261                     }
1262
1263                     if (groupInfo.getName().isPresent()) {
1264                         group.name = groupInfo.getName().get();
1265                     }
1266
1267                     if (groupInfo.getMembers().isPresent()) {
1268                         group.addMembers(groupInfo.getMembers().get());
1269                     }
1270
1271                     account.getGroupStore().updateGroup(group);
1272                     break;
1273                 case DELIVER:
1274                     if (group == null) {
1275                         try {
1276                             sendGroupInfoRequest(groupInfo.getGroupId(), source);
1277                         } catch (IOException | EncapsulatedExceptions e) {
1278                             e.printStackTrace();
1279                         }
1280                     }
1281                     break;
1282                 case QUIT:
1283                     if (group == null) {
1284                         try {
1285                             sendGroupInfoRequest(groupInfo.getGroupId(), source);
1286                         } catch (IOException | EncapsulatedExceptions e) {
1287                             e.printStackTrace();
1288                         }
1289                     } else {
1290                         group.removeMember(source);
1291                         account.getGroupStore().updateGroup(group);
1292                     }
1293                     break;
1294                 case REQUEST_INFO:
1295                     if (group != null) {
1296                         try {
1297                             sendUpdateGroupMessage(groupInfo.getGroupId(), source);
1298                         } catch (IOException | EncapsulatedExceptions e) {
1299                             e.printStackTrace();
1300                         } catch (NotAGroupMemberException e) {
1301                             // We have left this group, so don't send a group update message
1302                         }
1303                     }
1304                     break;
1305             }
1306         }
1307         if (message.isEndSession()) {
1308             handleEndSession(isSync ? destination.getNumber().get() : source.getNumber().get());
1309         }
1310         if (message.isExpirationUpdate() || message.getBody().isPresent()) {
1311             if (message.getGroupInfo().isPresent()) {
1312                 SignalServiceGroup groupInfo = message.getGroupInfo().get();
1313                 GroupInfo group = account.getGroupStore().getGroup(groupInfo.getGroupId());
1314                 if (group == null) {
1315                     group = new GroupInfo(groupInfo.getGroupId());
1316                 }
1317                 if (group.messageExpirationTime != message.getExpiresInSeconds()) {
1318                     group.messageExpirationTime = message.getExpiresInSeconds();
1319                     account.getGroupStore().updateGroup(group);
1320                 }
1321             } else {
1322                 ContactInfo contact = account.getContactStore().getContact(isSync ? destination : source);
1323                 if (contact == null) {
1324                     contact = new ContactInfo(isSync ? destination : source);
1325                 }
1326                 if (contact.messageExpirationTime != message.getExpiresInSeconds()) {
1327                     contact.messageExpirationTime = message.getExpiresInSeconds();
1328                     account.getContactStore().updateContact(contact);
1329                 }
1330             }
1331         }
1332         if (message.getAttachments().isPresent() && !ignoreAttachments) {
1333             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
1334                 if (attachment.isPointer()) {
1335                     try {
1336                         retrieveAttachment(attachment.asPointer());
1337                     } catch (IOException | InvalidMessageException e) {
1338                         System.err.println("Failed to retrieve attachment (" + attachment.asPointer().getId() + "): " + e.getMessage());
1339                     }
1340                 }
1341             }
1342         }
1343         if (message.getProfileKey().isPresent() && message.getProfileKey().get().length == 32) {
1344             if (source.matches(account.getSelfAddress())) {
1345                 try {
1346                     this.account.setProfileKey(new ProfileKey(message.getProfileKey().get()));
1347                 } catch (InvalidInputException ignored) {
1348                 }
1349                 ContactInfo contact = account.getContactStore().getContact(source);
1350                 if (contact != null) {
1351                     contact.profileKey = Base64.encodeBytes(message.getProfileKey().get());
1352                     account.getContactStore().updateContact(contact);
1353                 }
1354             } else {
1355                 ContactInfo contact = account.getContactStore().getContact(source);
1356                 if (contact == null) {
1357                     contact = new ContactInfo(source);
1358                 }
1359                 contact.profileKey = Base64.encodeBytes(message.getProfileKey().get());
1360                 account.getContactStore().updateContact(contact);
1361             }
1362         }
1363         if (message.getPreviews().isPresent()) {
1364             final List<SignalServiceDataMessage.Preview> previews = message.getPreviews().get();
1365             for (SignalServiceDataMessage.Preview preview : previews) {
1366                 if (preview.getImage().isPresent() && preview.getImage().get().isPointer()) {
1367                     SignalServiceAttachmentPointer attachment = preview.getImage().get().asPointer();
1368                     try {
1369                         retrieveAttachment(attachment);
1370                     } catch (IOException | InvalidMessageException e) {
1371                         System.err.println("Failed to retrieve attachment (" + attachment.getId() + "): " + e.getMessage());
1372                     }
1373                 }
1374             }
1375         }
1376     }
1377
1378     private void retryFailedReceivedMessages(ReceiveMessageHandler handler, boolean ignoreAttachments) {
1379         final File cachePath = new File(getMessageCachePath());
1380         if (!cachePath.exists()) {
1381             return;
1382         }
1383         for (final File dir : Objects.requireNonNull(cachePath.listFiles())) {
1384             if (!dir.isDirectory()) {
1385                 continue;
1386             }
1387
1388             for (final File fileEntry : Objects.requireNonNull(dir.listFiles())) {
1389                 if (!fileEntry.isFile()) {
1390                     continue;
1391                 }
1392                 SignalServiceEnvelope envelope;
1393                 try {
1394                     envelope = Utils.loadEnvelope(fileEntry);
1395                     if (envelope == null) {
1396                         continue;
1397                     }
1398                 } catch (IOException e) {
1399                     e.printStackTrace();
1400                     continue;
1401                 }
1402                 SignalServiceContent content = null;
1403                 if (!envelope.isReceipt()) {
1404                     try {
1405                         content = decryptMessage(envelope);
1406                     } catch (Exception e) {
1407                         continue;
1408                     }
1409                     handleMessage(envelope, content, ignoreAttachments);
1410                 }
1411                 account.save();
1412                 handler.handleMessage(envelope, content, null);
1413                 try {
1414                     Files.delete(fileEntry.toPath());
1415                 } catch (IOException e) {
1416                     System.err.println("Failed to delete cached message file “" + fileEntry + "”: " + e.getMessage());
1417                 }
1418             }
1419             // Try to delete directory if empty
1420             dir.delete();
1421         }
1422     }
1423
1424     public void receiveMessages(long timeout, TimeUnit unit, boolean returnOnTimeout, boolean ignoreAttachments, ReceiveMessageHandler handler) throws IOException {
1425         retryFailedReceivedMessages(handler, ignoreAttachments);
1426         final SignalServiceMessageReceiver messageReceiver = getMessageReceiver();
1427
1428         try {
1429             if (messagePipe == null) {
1430                 messagePipe = messageReceiver.createMessagePipe();
1431             }
1432
1433             while (true) {
1434                 SignalServiceEnvelope envelope;
1435                 SignalServiceContent content = null;
1436                 Exception exception = null;
1437                 final long now = new Date().getTime();
1438                 try {
1439                     envelope = messagePipe.read(timeout, unit, envelope1 -> {
1440                         // store message on disk, before acknowledging receipt to the server
1441                         try {
1442                             File cacheFile = getMessageCacheFile(envelope1.getSourceE164().get(), now, envelope1.getTimestamp());
1443                             Utils.storeEnvelope(envelope1, cacheFile);
1444                         } catch (IOException e) {
1445                             System.err.println("Failed to store encrypted message in disk cache, ignoring: " + e.getMessage());
1446                         }
1447                     });
1448                 } catch (TimeoutException e) {
1449                     if (returnOnTimeout)
1450                         return;
1451                     continue;
1452                 } catch (InvalidVersionException e) {
1453                     System.err.println("Ignoring error: " + e.getMessage());
1454                     continue;
1455                 }
1456                 if (!envelope.isReceipt()) {
1457                     try {
1458                         content = decryptMessage(envelope);
1459                     } catch (Exception e) {
1460                         exception = e;
1461                     }
1462                     handleMessage(envelope, content, ignoreAttachments);
1463                 }
1464                 account.save();
1465                 if (!isMessageBlocked(envelope, content)) {
1466                     handler.handleMessage(envelope, content, exception);
1467                 }
1468                 if (!(exception instanceof ProtocolUntrustedIdentityException)) {
1469                     File cacheFile = null;
1470                     try {
1471                         cacheFile = getMessageCacheFile(envelope.getSourceE164().get(), now, envelope.getTimestamp());
1472                         Files.delete(cacheFile.toPath());
1473                         // Try to delete directory if empty
1474                         new File(getMessageCachePath()).delete();
1475                     } catch (IOException e) {
1476                         System.err.println("Failed to delete cached message file “" + cacheFile + "”: " + e.getMessage());
1477                     }
1478                 }
1479             }
1480         } finally {
1481             if (messagePipe != null) {
1482                 messagePipe.shutdown();
1483                 messagePipe = null;
1484             }
1485         }
1486     }
1487
1488     private boolean isMessageBlocked(SignalServiceEnvelope envelope, SignalServiceContent content) {
1489         SignalServiceAddress source;
1490         if (!envelope.isUnidentifiedSender() && envelope.hasSource()) {
1491             source = envelope.getSourceAddress();
1492         } else if (content != null) {
1493             source = content.getSender();
1494         } else {
1495             return false;
1496         }
1497         ContactInfo sourceContact = getContact(source.getNumber().get());
1498         if (sourceContact != null && sourceContact.blocked) {
1499             return true;
1500         }
1501
1502         if (content != null && content.getDataMessage().isPresent()) {
1503             SignalServiceDataMessage message = content.getDataMessage().get();
1504             if (message.getGroupInfo().isPresent()) {
1505                 SignalServiceGroup groupInfo = message.getGroupInfo().get();
1506                 GroupInfo group = getGroup(groupInfo.getGroupId());
1507                 if (groupInfo.getType() == SignalServiceGroup.Type.DELIVER && group != null && group.blocked) {
1508                     return true;
1509                 }
1510             }
1511         }
1512         return false;
1513     }
1514
1515     private void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, boolean ignoreAttachments) {
1516         if (content != null) {
1517             SignalServiceAddress sender;
1518             if (!envelope.isUnidentifiedSender() && envelope.hasSource()) {
1519                 sender = envelope.getSourceAddress();
1520             } else {
1521                 sender = content.getSender();
1522             }
1523             if (content.getDataMessage().isPresent()) {
1524                 SignalServiceDataMessage message = content.getDataMessage().get();
1525
1526                 if (content.isNeedsReceipt()) {
1527                     try {
1528                         sendReceipt(sender, message.getTimestamp());
1529                     } catch (IOException | UntrustedIdentityException e) {
1530                         e.printStackTrace();
1531                     }
1532                 }
1533
1534                 handleSignalServiceDataMessage(message, false, sender, account.getSelfAddress(), ignoreAttachments);
1535             }
1536             if (content.getSyncMessage().isPresent()) {
1537                 account.setMultiDevice(true);
1538                 SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
1539                 if (syncMessage.getSent().isPresent()) {
1540                     SentTranscriptMessage message = syncMessage.getSent().get();
1541                     handleSignalServiceDataMessage(message.getMessage(), true, sender, message.getDestination().orNull(), ignoreAttachments);
1542                 }
1543                 if (syncMessage.getRequest().isPresent()) {
1544                     RequestMessage rm = syncMessage.getRequest().get();
1545                     if (rm.isContactsRequest()) {
1546                         try {
1547                             sendContacts();
1548                         } catch (UntrustedIdentityException | IOException e) {
1549                             e.printStackTrace();
1550                         }
1551                     }
1552                     if (rm.isGroupsRequest()) {
1553                         try {
1554                             sendGroups();
1555                         } catch (UntrustedIdentityException | IOException e) {
1556                             e.printStackTrace();
1557                         }
1558                     }
1559                     if (rm.isBlockedListRequest()) {
1560                         try {
1561                             sendBlockedList();
1562                         } catch (UntrustedIdentityException | IOException e) {
1563                             e.printStackTrace();
1564                         }
1565                     }
1566                     // TODO Handle rm.isConfigurationRequest();
1567                 }
1568                 if (syncMessage.getGroups().isPresent()) {
1569                     File tmpFile = null;
1570                     try {
1571                         tmpFile = IOUtils.createTempFile();
1572                         try (InputStream attachmentAsStream = retrieveAttachmentAsStream(syncMessage.getGroups().get().asPointer(), tmpFile)) {
1573                             DeviceGroupsInputStream s = new DeviceGroupsInputStream(attachmentAsStream);
1574                             DeviceGroup g;
1575                             while ((g = s.read()) != null) {
1576                                 GroupInfo syncGroup = account.getGroupStore().getGroup(g.getId());
1577                                 if (syncGroup == null) {
1578                                     syncGroup = new GroupInfo(g.getId());
1579                                 }
1580                                 if (g.getName().isPresent()) {
1581                                     syncGroup.name = g.getName().get();
1582                                 }
1583                                 syncGroup.addMembers(g.getMembers());
1584                                 if (!g.isActive()) {
1585                                     syncGroup.removeMember(account.getSelfAddress());
1586                                 } else {
1587                                     // Add ourself to the member set as it's marked as active
1588                                     syncGroup.addMembers(Collections.singleton(account.getSelfAddress()));
1589                                 }
1590                                 syncGroup.blocked = g.isBlocked();
1591                                 if (g.getColor().isPresent()) {
1592                                     syncGroup.color = g.getColor().get();
1593                                 }
1594
1595                                 if (g.getAvatar().isPresent()) {
1596                                     retrieveGroupAvatarAttachment(g.getAvatar().get(), syncGroup.groupId);
1597                                 }
1598                                 syncGroup.inboxPosition = g.getInboxPosition().orNull();
1599                                 syncGroup.archived = g.isArchived();
1600                                 account.getGroupStore().updateGroup(syncGroup);
1601                             }
1602                         }
1603                     } catch (Exception e) {
1604                         e.printStackTrace();
1605                     } finally {
1606                         if (tmpFile != null) {
1607                             try {
1608                                 Files.delete(tmpFile.toPath());
1609                             } catch (IOException e) {
1610                                 System.err.println("Failed to delete received groups temp file “" + tmpFile + "”: " + e.getMessage());
1611                             }
1612                         }
1613                     }
1614                 }
1615                 if (syncMessage.getBlockedList().isPresent()) {
1616                     final BlockedListMessage blockedListMessage = syncMessage.getBlockedList().get();
1617                     for (SignalServiceAddress address : blockedListMessage.getAddresses()) {
1618                         if (address.getNumber().isPresent()) {
1619                             try {
1620                                 setContactBlocked(address.getNumber().get(), true);
1621                             } catch (InvalidNumberException e) {
1622                                 e.printStackTrace();
1623                             }
1624                         }
1625                     }
1626                     for (byte[] groupId : blockedListMessage.getGroupIds()) {
1627                         try {
1628                             setGroupBlocked(groupId, true);
1629                         } catch (GroupNotFoundException e) {
1630                             System.err.println("BlockedListMessage contained groupID that was not found in GroupStore: " + Base64.encodeBytes(groupId));
1631                         }
1632                     }
1633                 }
1634                 if (syncMessage.getContacts().isPresent()) {
1635                     File tmpFile = null;
1636                     try {
1637                         tmpFile = IOUtils.createTempFile();
1638                         final ContactsMessage contactsMessage = syncMessage.getContacts().get();
1639                         try (InputStream attachmentAsStream = retrieveAttachmentAsStream(contactsMessage.getContactsStream().asPointer(), tmpFile)) {
1640                             DeviceContactsInputStream s = new DeviceContactsInputStream(attachmentAsStream);
1641                             if (contactsMessage.isComplete()) {
1642                                 account.getContactStore().clear();
1643                             }
1644                             DeviceContact c;
1645                             while ((c = s.read()) != null) {
1646                                 if (c.getAddress().matches(account.getSelfAddress()) && c.getProfileKey().isPresent()) {
1647                                     account.setProfileKey(c.getProfileKey().get());
1648                                 }
1649                                 ContactInfo contact = account.getContactStore().getContact(c.getAddress());
1650                                 if (contact == null) {
1651                                     contact = new ContactInfo(c.getAddress());
1652                                 }
1653                                 if (c.getName().isPresent()) {
1654                                     contact.name = c.getName().get();
1655                                 }
1656                                 if (c.getColor().isPresent()) {
1657                                     contact.color = c.getColor().get();
1658                                 }
1659                                 if (c.getProfileKey().isPresent()) {
1660                                     contact.profileKey = Base64.encodeBytes(c.getProfileKey().get().serialize());
1661                                 }
1662                                 if (c.getVerified().isPresent()) {
1663                                     final VerifiedMessage verifiedMessage = c.getVerified().get();
1664                                     account.getSignalProtocolStore().saveIdentity(verifiedMessage.getDestination().getNumber().get(), verifiedMessage.getIdentityKey(), TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
1665                                 }
1666                                 if (c.getExpirationTimer().isPresent()) {
1667                                     contact.messageExpirationTime = c.getExpirationTimer().get();
1668                                 }
1669                                 contact.blocked = c.isBlocked();
1670                                 contact.inboxPosition = c.getInboxPosition().orNull();
1671                                 contact.archived = c.isArchived();
1672                                 account.getContactStore().updateContact(contact);
1673
1674                                 if (c.getAvatar().isPresent()) {
1675                                     retrieveContactAvatarAttachment(c.getAvatar().get(), contact.number);
1676                                 }
1677                             }
1678                         }
1679                     } catch (Exception e) {
1680                         e.printStackTrace();
1681                     } finally {
1682                         if (tmpFile != null) {
1683                             try {
1684                                 Files.delete(tmpFile.toPath());
1685                             } catch (IOException e) {
1686                                 System.err.println("Failed to delete received contacts temp file “" + tmpFile + "”: " + e.getMessage());
1687                             }
1688                         }
1689                     }
1690                 }
1691                 if (syncMessage.getVerified().isPresent()) {
1692                     final VerifiedMessage verifiedMessage = syncMessage.getVerified().get();
1693                     account.getSignalProtocolStore().saveIdentity(verifiedMessage.getDestination().getNumber().get(), verifiedMessage.getIdentityKey(), TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
1694                 }
1695                 if (syncMessage.getConfiguration().isPresent()) {
1696                     // TODO
1697                 }
1698             }
1699         }
1700     }
1701
1702     private File getContactAvatarFile(String number) {
1703         return new File(avatarsPath, "contact-" + number);
1704     }
1705
1706     private File retrieveContactAvatarAttachment(SignalServiceAttachment attachment, String number) throws IOException, InvalidMessageException {
1707         IOUtils.createPrivateDirectories(avatarsPath);
1708         if (attachment.isPointer()) {
1709             SignalServiceAttachmentPointer pointer = attachment.asPointer();
1710             return retrieveAttachment(pointer, getContactAvatarFile(number), false);
1711         } else {
1712             SignalServiceAttachmentStream stream = attachment.asStream();
1713             return Utils.retrieveAttachment(stream, getContactAvatarFile(number));
1714         }
1715     }
1716
1717     private File getGroupAvatarFile(byte[] groupId) {
1718         return new File(avatarsPath, "group-" + Base64.encodeBytes(groupId).replace("/", "_"));
1719     }
1720
1721     private File retrieveGroupAvatarAttachment(SignalServiceAttachment attachment, byte[] groupId) throws IOException, InvalidMessageException {
1722         IOUtils.createPrivateDirectories(avatarsPath);
1723         if (attachment.isPointer()) {
1724             SignalServiceAttachmentPointer pointer = attachment.asPointer();
1725             return retrieveAttachment(pointer, getGroupAvatarFile(groupId), false);
1726         } else {
1727             SignalServiceAttachmentStream stream = attachment.asStream();
1728             return Utils.retrieveAttachment(stream, getGroupAvatarFile(groupId));
1729         }
1730     }
1731
1732     public File getAttachmentFile(long attachmentId) {
1733         return new File(attachmentsPath, attachmentId + "");
1734     }
1735
1736     private File retrieveAttachment(SignalServiceAttachmentPointer pointer) throws IOException, InvalidMessageException {
1737         IOUtils.createPrivateDirectories(attachmentsPath);
1738         return retrieveAttachment(pointer, getAttachmentFile(pointer.getId()), true);
1739     }
1740
1741     private File retrieveAttachment(SignalServiceAttachmentPointer pointer, File outputFile, boolean storePreview) throws IOException, InvalidMessageException {
1742         if (storePreview && pointer.getPreview().isPresent()) {
1743             File previewFile = new File(outputFile + ".preview");
1744             try (OutputStream output = new FileOutputStream(previewFile)) {
1745                 byte[] preview = pointer.getPreview().get();
1746                 output.write(preview, 0, preview.length);
1747             } catch (FileNotFoundException e) {
1748                 e.printStackTrace();
1749                 return null;
1750             }
1751         }
1752
1753         final SignalServiceMessageReceiver messageReceiver = getMessageReceiver();
1754
1755         File tmpFile = IOUtils.createTempFile();
1756         try (InputStream input = messageReceiver.retrieveAttachment(pointer, tmpFile, BaseConfig.MAX_ATTACHMENT_SIZE)) {
1757             try (OutputStream output = new FileOutputStream(outputFile)) {
1758                 byte[] buffer = new byte[4096];
1759                 int read;
1760
1761                 while ((read = input.read(buffer)) != -1) {
1762                     output.write(buffer, 0, read);
1763                 }
1764             } catch (FileNotFoundException e) {
1765                 e.printStackTrace();
1766                 return null;
1767             }
1768         } finally {
1769             try {
1770                 Files.delete(tmpFile.toPath());
1771             } catch (IOException e) {
1772                 System.err.println("Failed to delete received attachment temp file “" + tmpFile + "”: " + e.getMessage());
1773             }
1774         }
1775         return outputFile;
1776     }
1777
1778     private InputStream retrieveAttachmentAsStream(SignalServiceAttachmentPointer pointer, File tmpFile) throws IOException, InvalidMessageException {
1779         final SignalServiceMessageReceiver messageReceiver = getMessageReceiver();
1780         return messageReceiver.retrieveAttachment(pointer, tmpFile, BaseConfig.MAX_ATTACHMENT_SIZE);
1781     }
1782
1783     @Override
1784     public boolean isRemote() {
1785         return false;
1786     }
1787
1788     private void sendGroups() throws IOException, UntrustedIdentityException {
1789         File groupsFile = IOUtils.createTempFile();
1790
1791         try {
1792             try (OutputStream fos = new FileOutputStream(groupsFile)) {
1793                 DeviceGroupsOutputStream out = new DeviceGroupsOutputStream(fos);
1794                 for (GroupInfo record : account.getGroupStore().getGroups()) {
1795                     out.write(new DeviceGroup(record.groupId, Optional.fromNullable(record.name),
1796                             new ArrayList<>(record.getMembers()), createGroupAvatarAttachment(record.groupId),
1797                             record.isMember(account.getSelfAddress()), Optional.of(record.messageExpirationTime),
1798                             Optional.fromNullable(record.color), record.blocked, Optional.fromNullable(record.inboxPosition), record.archived));
1799                 }
1800             }
1801
1802             if (groupsFile.exists() && groupsFile.length() > 0) {
1803                 try (FileInputStream groupsFileStream = new FileInputStream(groupsFile)) {
1804                     SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
1805                             .withStream(groupsFileStream)
1806                             .withContentType("application/octet-stream")
1807                             .withLength(groupsFile.length())
1808                             .build();
1809
1810                     sendSyncMessage(SignalServiceSyncMessage.forGroups(attachmentStream));
1811                 }
1812             }
1813         } finally {
1814             try {
1815                 Files.delete(groupsFile.toPath());
1816             } catch (IOException e) {
1817                 System.err.println("Failed to delete groups temp file “" + groupsFile + "”: " + e.getMessage());
1818             }
1819         }
1820     }
1821
1822     public void sendContacts() throws IOException, UntrustedIdentityException {
1823         File contactsFile = IOUtils.createTempFile();
1824
1825         try {
1826             try (OutputStream fos = new FileOutputStream(contactsFile)) {
1827                 DeviceContactsOutputStream out = new DeviceContactsOutputStream(fos);
1828                 for (ContactInfo record : account.getContactStore().getContacts()) {
1829                     VerifiedMessage verifiedMessage = null;
1830                     if (getIdentities().containsKey(record.number)) {
1831                         JsonIdentityKeyStore.Identity currentIdentity = null;
1832                         for (JsonIdentityKeyStore.Identity id : getIdentities().get(record.number)) {
1833                             if (currentIdentity == null || id.getDateAdded().after(currentIdentity.getDateAdded())) {
1834                                 currentIdentity = id;
1835                             }
1836                         }
1837                         if (currentIdentity != null) {
1838                             verifiedMessage = new VerifiedMessage(record.getAddress(), currentIdentity.getIdentityKey(), currentIdentity.getTrustLevel().toVerifiedState(), currentIdentity.getDateAdded().getTime());
1839                         }
1840                     }
1841
1842                     ProfileKey profileKey = null;
1843                     try {
1844                         profileKey = record.profileKey == null ? null : new ProfileKey(Base64.decode(record.profileKey));
1845                     } catch (InvalidInputException ignored) {
1846                     }
1847                     out.write(new DeviceContact(record.getAddress(), Optional.fromNullable(record.name),
1848                             createContactAvatarAttachment(record.number), Optional.fromNullable(record.color),
1849                             Optional.fromNullable(verifiedMessage), Optional.fromNullable(profileKey), record.blocked,
1850                             Optional.of(record.messageExpirationTime),
1851                             Optional.fromNullable(record.inboxPosition), record.archived));
1852                 }
1853
1854                 if (account.getProfileKey() != null) {
1855                     // Send our own profile key as well
1856                     out.write(new DeviceContact(account.getSelfAddress(),
1857                             Optional.absent(), Optional.absent(),
1858                             Optional.absent(), Optional.absent(),
1859                             Optional.of(account.getProfileKey()),
1860                             false, Optional.absent(), Optional.absent(), false));
1861                 }
1862             }
1863
1864             if (contactsFile.exists() && contactsFile.length() > 0) {
1865                 try (FileInputStream contactsFileStream = new FileInputStream(contactsFile)) {
1866                     SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
1867                             .withStream(contactsFileStream)
1868                             .withContentType("application/octet-stream")
1869                             .withLength(contactsFile.length())
1870                             .build();
1871
1872                     sendSyncMessage(SignalServiceSyncMessage.forContacts(new ContactsMessage(attachmentStream, true)));
1873                 }
1874             }
1875         } finally {
1876             try {
1877                 Files.delete(contactsFile.toPath());
1878             } catch (IOException e) {
1879                 System.err.println("Failed to delete contacts temp file “" + contactsFile + "”: " + e.getMessage());
1880             }
1881         }
1882     }
1883
1884     private void sendBlockedList() throws IOException, UntrustedIdentityException {
1885         List<SignalServiceAddress> addresses = new ArrayList<>();
1886         for (ContactInfo record : account.getContactStore().getContacts()) {
1887             if (record.blocked) {
1888                 addresses.add(record.getAddress());
1889             }
1890         }
1891         List<byte[]> groupIds = new ArrayList<>();
1892         for (GroupInfo record : account.getGroupStore().getGroups()) {
1893             if (record.blocked) {
1894                 groupIds.add(record.groupId);
1895             }
1896         }
1897         sendSyncMessage(SignalServiceSyncMessage.forBlocked(new BlockedListMessage(addresses, groupIds)));
1898     }
1899
1900     private void sendVerifiedMessage(SignalServiceAddress destination, IdentityKey identityKey, TrustLevel trustLevel) throws IOException, UntrustedIdentityException {
1901         VerifiedMessage verifiedMessage = new VerifiedMessage(destination, identityKey, trustLevel.toVerifiedState(), System.currentTimeMillis());
1902         sendSyncMessage(SignalServiceSyncMessage.forVerified(verifiedMessage));
1903     }
1904
1905     public List<ContactInfo> getContacts() {
1906         return account.getContactStore().getContacts();
1907     }
1908
1909     public ContactInfo getContact(String number) {
1910         return account.getContactStore().getContact(new SignalServiceAddress(null, number));
1911     }
1912
1913     public GroupInfo getGroup(byte[] groupId) {
1914         return account.getGroupStore().getGroup(groupId);
1915     }
1916
1917     public Map<String, List<JsonIdentityKeyStore.Identity>> getIdentities() {
1918         return account.getSignalProtocolStore().getIdentities();
1919     }
1920
1921     public Pair<String, List<JsonIdentityKeyStore.Identity>> getIdentities(String number) throws InvalidNumberException {
1922         String canonicalizedNumber = Utils.canonicalizeNumber(number, account.getUsername());
1923         return new Pair<>(canonicalizedNumber, account.getSignalProtocolStore().getIdentities(canonicalizedNumber));
1924     }
1925
1926     /**
1927      * Trust this the identity with this fingerprint
1928      *
1929      * @param name        username of the identity
1930      * @param fingerprint Fingerprint
1931      */
1932     public boolean trustIdentityVerified(String name, byte[] fingerprint) {
1933         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(name);
1934         if (ids == null) {
1935             return false;
1936         }
1937         for (JsonIdentityKeyStore.Identity id : ids) {
1938             if (!Arrays.equals(id.getIdentityKey().serialize(), fingerprint)) {
1939                 continue;
1940             }
1941
1942             account.getSignalProtocolStore().saveIdentity(name, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1943             try {
1944                 sendVerifiedMessage(new SignalServiceAddress(null, name), id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1945             } catch (IOException | UntrustedIdentityException e) {
1946                 e.printStackTrace();
1947             }
1948             account.save();
1949             return true;
1950         }
1951         return false;
1952     }
1953
1954     /**
1955      * Trust this the identity with this safety number
1956      *
1957      * @param name         username of the identity
1958      * @param safetyNumber Safety number
1959      */
1960     public boolean trustIdentityVerifiedSafetyNumber(String name, String safetyNumber) {
1961         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(name);
1962         if (ids == null) {
1963             return false;
1964         }
1965         for (JsonIdentityKeyStore.Identity id : ids) {
1966             if (!safetyNumber.equals(computeSafetyNumber(name, id.getIdentityKey()))) {
1967                 continue;
1968             }
1969
1970             account.getSignalProtocolStore().saveIdentity(name, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1971             try {
1972                 sendVerifiedMessage(new SignalServiceAddress(null, name), id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1973             } catch (IOException | UntrustedIdentityException e) {
1974                 e.printStackTrace();
1975             }
1976             account.save();
1977             return true;
1978         }
1979         return false;
1980     }
1981
1982     /**
1983      * Trust all keys of this identity without verification
1984      *
1985      * @param name username of the identity
1986      */
1987     public boolean trustIdentityAllKeys(String name) {
1988         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(name);
1989         if (ids == null) {
1990             return false;
1991         }
1992         for (JsonIdentityKeyStore.Identity id : ids) {
1993             if (id.getTrustLevel() == TrustLevel.UNTRUSTED) {
1994                 account.getSignalProtocolStore().saveIdentity(name, id.getIdentityKey(), TrustLevel.TRUSTED_UNVERIFIED);
1995                 try {
1996                     sendVerifiedMessage(new SignalServiceAddress(null, name), id.getIdentityKey(), TrustLevel.TRUSTED_UNVERIFIED);
1997                 } catch (IOException | UntrustedIdentityException e) {
1998                     e.printStackTrace();
1999                 }
2000             }
2001         }
2002         account.save();
2003         return true;
2004     }
2005
2006     public String computeSafetyNumber(String theirUsername, IdentityKey theirIdentityKey) {
2007         return Utils.computeSafetyNumber(account.getUsername(), getIdentity(), theirUsername, theirIdentityKey);
2008     }
2009
2010     public interface ReceiveMessageHandler {
2011
2012         void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent decryptedContent, Throwable e);
2013     }
2014 }