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