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.NotAGroupMemberException;
  25 import org.asamk.signal.StickerPackInvalidException;
  26 import org.asamk.signal.TrustLevel;
  27 import org.asamk.signal.UserAlreadyExists;
  28 import org.asamk.signal.storage.SignalAccount;
  29 import org.asamk.signal.storage.contacts.ContactInfo;
  30 import org.asamk.signal.storage.groups.GroupInfo;
  31 import org.asamk.signal.storage.groups.JsonGroupStore;
  32 import org.asamk.signal.storage.protocol.JsonIdentityKeyStore;
  33 import org.asamk.signal.util.IOUtils;
  34 import org.asamk.signal.util.Util;
  35 import org.signal.libsignal.metadata.InvalidMetadataMessageException;
  36 import org.signal.libsignal.metadata.InvalidMetadataVersionException;
  37 import org.signal.libsignal.metadata.ProtocolDuplicateMessageException;
  38 import org.signal.libsignal.metadata.ProtocolInvalidKeyException;
  39 import org.signal.libsignal.metadata.ProtocolInvalidKeyIdException;
  40 import org.signal.libsignal.metadata.ProtocolInvalidMessageException;
  41 import org.signal.libsignal.metadata.ProtocolInvalidVersionException;
  42 import org.signal.libsignal.metadata.ProtocolLegacyMessageException;
  43 import org.signal.libsignal.metadata.ProtocolNoSessionException;
  44 import org.signal.libsignal.metadata.ProtocolUntrustedIdentityException;
  45 import org.signal.libsignal.metadata.SelfSendException;
  46 import org.signal.libsignal.metadata.certificate.InvalidCertificateException;
  47 import org.signal.zkgroup.InvalidInputException;
  48 import org.signal.zkgroup.VerificationFailedException;
  49 import org.signal.zkgroup.profiles.ProfileKey;
  50 import org.whispersystems.libsignal.IdentityKey;
  51 import org.whispersystems.libsignal.IdentityKeyPair;
  52 import org.whispersystems.libsignal.InvalidKeyException;
  53 import org.whispersystems.libsignal.InvalidMessageException;
  54 import org.whispersystems.libsignal.InvalidVersionException;
  55 import org.whispersystems.libsignal.ecc.Curve;
  56 import org.whispersystems.libsignal.ecc.ECKeyPair;
  57 import org.whispersystems.libsignal.ecc.ECPublicKey;
  58 import org.whispersystems.libsignal.state.PreKeyRecord;
  59 import org.whispersystems.libsignal.state.SignedPreKeyRecord;
  60 import org.whispersystems.libsignal.util.KeyHelper;
  61 import org.whispersystems.libsignal.util.Medium;
  62 import org.whispersystems.libsignal.util.Pair;
  63 import org.whispersystems.libsignal.util.guava.Optional;
  64 import org.whispersystems.signalservice.api.SignalServiceAccountManager;
  65 import org.whispersystems.signalservice.api.SignalServiceMessagePipe;
  66 import org.whispersystems.signalservice.api.SignalServiceMessageReceiver;
  67 import org.whispersystems.signalservice.api.SignalServiceMessageSender;
  68 import org.whispersystems.signalservice.api.crypto.InvalidCiphertextException;
  69 import org.whispersystems.signalservice.api.crypto.ProfileCipher;
  70 import org.whispersystems.signalservice.api.crypto.SignalServiceCipher;
  71 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccess;
  72 import org.whispersystems.signalservice.api.crypto.UnidentifiedAccessPair;
  73 import org.whispersystems.signalservice.api.crypto.UntrustedIdentityException;
  74 import org.whispersystems.signalservice.api.messages.SendMessageResult;
  75 import org.whispersystems.signalservice.api.messages.SignalServiceAttachment;
  76 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentPointer;
  77 import org.whispersystems.signalservice.api.messages.SignalServiceAttachmentStream;
  78 import org.whispersystems.signalservice.api.messages.SignalServiceContent;
  79 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
  80 import org.whispersystems.signalservice.api.messages.SignalServiceEnvelope;
  81 import org.whispersystems.signalservice.api.messages.SignalServiceGroup;
  82 import org.whispersystems.signalservice.api.messages.SignalServiceReceiptMessage;
  83 import org.whispersystems.signalservice.api.messages.SignalServiceStickerManifestUpload;
  84 import org.whispersystems.signalservice.api.messages.SignalServiceStickerManifestUpload.StickerInfo;
  85 import org.whispersystems.signalservice.api.messages.multidevice.BlockedListMessage;
  86 import org.whispersystems.signalservice.api.messages.multidevice.ContactsMessage;
  87 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContact;
  88 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContactsInputStream;
  89 import org.whispersystems.signalservice.api.messages.multidevice.DeviceContactsOutputStream;
  90 import org.whispersystems.signalservice.api.messages.multidevice.DeviceGroup;
  91 import org.whispersystems.signalservice.api.messages.multidevice.DeviceGroupsInputStream;
  92 import org.whispersystems.signalservice.api.messages.multidevice.DeviceGroupsOutputStream;
  93 import org.whispersystems.signalservice.api.messages.multidevice.DeviceInfo;
  94 import org.whispersystems.signalservice.api.messages.multidevice.RequestMessage;
  95 import org.whispersystems.signalservice.api.messages.multidevice.SentTranscriptMessage;
  96 import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
  97 import org.whispersystems.signalservice.api.messages.multidevice.VerifiedMessage;
  98 import org.whispersystems.signalservice.api.profiles.SignalServiceProfile;
  99 import org.whispersystems.signalservice.api.push.ContactTokenDetails;
 100 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
 101 import org.whispersystems.signalservice.api.push.exceptions.EncapsulatedExceptions;
 102 import org.whispersystems.signalservice.api.push.exceptions.NetworkFailureException;
 103 import org.whispersystems.signalservice.api.push.exceptions.UnregisteredUserException;
 104 import org.whispersystems.signalservice.api.util.InvalidNumberException;
 105 import org.whispersystems.signalservice.api.util.SleepTimer;
 106 import org.whispersystems.signalservice.api.util.StreamDetails;
 107 import org.whispersystems.signalservice.api.util.UptimeSleepTimer;
 108 import org.whispersystems.signalservice.api.util.UuidUtil;
 109 import org.whispersystems.signalservice.internal.push.SignalServiceProtos;
 110 import org.whispersystems.signalservice.internal.push.UnsupportedDataMessageException;
 111 import org.whispersystems.signalservice.internal.util.Hex;
 112 import org.whispersystems.util.Base64;
 113
 114 import java.io.File;
 115 import java.io.FileInputStream;
 116 import java.io.FileNotFoundException;
 117 import java.io.FileOutputStream;
 118 import java.io.IOException;
 119 import java.io.InputStream;
 120 import java.io.OutputStream;
 121 import java.net.URI;
 122 import java.net.URISyntaxException;
 123 import java.net.URLEncoder;
 124 import java.nio.file.Files;
 125 import java.nio.file.Paths;
 126 import java.nio.file.StandardCopyOption;
 127 import java.util.ArrayList;
 128 import java.util.Arrays;
 129 import java.util.Collection;
 130 import java.util.Collections;
 131 import java.util.Date;
 132 import java.util.HashSet;
 133 import java.util.LinkedList;
 134 import java.util.List;
 135 import java.util.Locale;
 136 import java.util.Objects;
 137 import java.util.Set;
 138 import java.util.UUID;
 139 import java.util.concurrent.TimeUnit;
 140 import java.util.concurrent.TimeoutException;
 141 import java.util.stream.Collectors;
 142 import java.util.zip.ZipEntry;
 143 import java.util.zip.ZipFile;
 144
 145 public class Manager implements Signal {
 146
 147     private final String settingsPath;
 148     private final String dataPath;
 149     private final String attachmentsPath;
 150     private final String avatarsPath;
 151     private final SleepTimer timer = new UptimeSleepTimer();
 152
 153     private SignalAccount account;
 154     private String username;
 155     private SignalServiceAccountManager accountManager;
 156     private SignalServiceMessagePipe messagePipe = null;
 157     private SignalServiceMessagePipe unidentifiedMessagePipe = null;
 158
 159     public Manager(String username, String settingsPath) {
 160         this.username = username;
 161         this.settingsPath = settingsPath;
 162         this.dataPath = this.settingsPath + "/data";
 163         this.attachmentsPath = this.settingsPath + "/attachments";
 164         this.avatarsPath = this.settingsPath + "/avatars";
 165
 166     }
 167
 168     public String getUsername() {
 169         return username;
 170     }
 171
 172     public SignalServiceAddress getSelfAddress() {
 173         return account.getSelfAddress();
 174     }
 175
 176     private SignalServiceAccountManager getSignalServiceAccountManager() {
 177         return new SignalServiceAccountManager(BaseConfig.serviceConfiguration, account.getUuid(), account.getUsername(), account.getPassword(), account.getDeviceId(), BaseConfig.USER_AGENT, timer);
 178     }
 179
 180     private IdentityKey getIdentity() {
 181         return account.getSignalProtocolStore().getIdentityKeyPair().getPublicKey();
 182     }
 183
 184     public int getDeviceId() {
 185         return account.getDeviceId();
 186     }
 187
 188     private String getMessageCachePath() {
 189         return this.dataPath + "/" + username + ".d/msg-cache";
 190     }
 191
 192     private String getMessageCachePath(String sender) {
 193         if (sender == null || sender.isEmpty()) {
 194             return getMessageCachePath();
 195         }
 196
 197         return getMessageCachePath() + "/" + sender.replace("/", "_");
 198     }
 199
 200     private File getMessageCacheFile(String sender, long now, long timestamp) throws IOException {
 201         String cachePath = getMessageCachePath(sender);
 202         IOUtils.createPrivateDirectories(cachePath);
 203         return new File(cachePath + "/" + now + "_" + timestamp);
 204     }
 205
 206     public boolean userHasKeys() {
 207         return account != null && account.getSignalProtocolStore() != null;
 208     }
 209
 210     public void init() throws IOException {
 211         if (!SignalAccount.userExists(dataPath, username)) {
 212             return;
 213         }
 214         account = SignalAccount.load(dataPath, username);
 215         account.setResolver(this::resolveSignalServiceAddress);
 216
 217         migrateLegacyConfigs();
 218
 219         accountManager = getSignalServiceAccountManager();
 220         if (account.isRegistered()) {
 221             if (accountManager.getPreKeysCount() < BaseConfig.PREKEY_MINIMUM_COUNT) {
 222                 refreshPreKeys();
 223                 account.save();
 224             }
 225             if (account.getUuid() == null) {
 226                 account.setUuid(accountManager.getOwnUuid());
 227                 account.save();
 228             }
 229         }
 230     }
 231
 232     private void migrateLegacyConfigs() {
 233         // Copy group avatars that were previously stored in the attachments folder
 234         // to the new avatar folder
 235         if (JsonGroupStore.groupsWithLegacyAvatarId.size() > 0) {
 236             for (GroupInfo g : JsonGroupStore.groupsWithLegacyAvatarId) {
 237                 File avatarFile = getGroupAvatarFile(g.groupId);
 238                 File attachmentFile = getAttachmentFile(g.getAvatarId());
 239                 if (!avatarFile.exists() && attachmentFile.exists()) {
 240                     try {
 241                         IOUtils.createPrivateDirectories(avatarsPath);
 242                         Files.copy(attachmentFile.toPath(), avatarFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
 243                     } catch (Exception e) {
 244                         // Ignore
 245                     }
 246                 }
 247             }
 248             JsonGroupStore.groupsWithLegacyAvatarId.clear();
 249             account.save();
 250         }
 251         if (account.getProfileKey() == null) {
 252             // Old config file, creating new profile key
 253             account.setProfileKey(KeyUtils.createProfileKey());
 254             account.save();
 255         }
 256     }
 257
 258     private void createNewIdentity() throws IOException {
 259         IdentityKeyPair identityKey = KeyHelper.generateIdentityKeyPair();
 260         int registrationId = KeyHelper.generateRegistrationId(false);
 261         if (username == null) {
 262             account = SignalAccount.createTemporaryAccount(identityKey, registrationId);
 263             account.setResolver(this::resolveSignalServiceAddress);
 264         } else {
 265             ProfileKey profileKey = KeyUtils.createProfileKey();
 266             account = SignalAccount.create(dataPath, username, identityKey, registrationId, profileKey);
 267             account.setResolver(this::resolveSignalServiceAddress);
 268             account.save();
 269         }
 270     }
 271
 272     public boolean isRegistered() {
 273         return account != null && account.isRegistered();
 274     }
 275
 276     public void register(boolean voiceVerification) throws IOException {
 277         if (account == null) {
 278             createNewIdentity();
 279         }
 280         account.setPassword(KeyUtils.createPassword());
 281         account.setUuid(null);
 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, BaseConfig.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         account.setResolver(this::resolveSignalServiceAddress);
 357
 358         refreshPreKeys();
 359
 360         requestSyncGroups();
 361         requestSyncContacts();
 362         requestSyncBlocked();
 363         requestSyncConfiguration();
 364
 365         account.save();
 366     }
 367
 368     public List<DeviceInfo> getLinkedDevices() throws IOException {
 369         List<DeviceInfo> devices = accountManager.getDevices();
 370         account.setMultiDevice(devices.size() > 1);
 371         account.save();
 372         return devices;
 373     }
 374
 375     public void removeLinkedDevices(int deviceId) throws IOException {
 376         accountManager.removeDevice(deviceId);
 377         List<DeviceInfo> devices = accountManager.getDevices();
 378         account.setMultiDevice(devices.size() > 1);
 379         account.save();
 380     }
 381
 382     public void addDeviceLink(URI linkUri) throws IOException, InvalidKeyException {
 383         Utils.DeviceLinkInfo info = Utils.parseDeviceLinkUri(linkUri);
 384
 385         addDevice(info.deviceIdentifier, info.deviceKey);
 386     }
 387
 388     private void addDevice(String deviceIdentifier, ECPublicKey deviceKey) throws IOException, InvalidKeyException {
 389         IdentityKeyPair identityKeyPair = account.getSignalProtocolStore().getIdentityKeyPair();
 390         String verificationCode = accountManager.getNewDeviceVerificationCode();
 391
 392         accountManager.addDevice(deviceIdentifier, deviceKey, identityKeyPair, Optional.of(account.getProfileKey().serialize()), verificationCode);
 393         account.setMultiDevice(true);
 394         account.save();
 395     }
 396
 397     private List<PreKeyRecord> generatePreKeys() {
 398         List<PreKeyRecord> records = new ArrayList<>(BaseConfig.PREKEY_BATCH_SIZE);
 399
 400         final int offset = account.getPreKeyIdOffset();
 401         for (int i = 0; i < BaseConfig.PREKEY_BATCH_SIZE; i++) {
 402             int preKeyId = (offset + i) % Medium.MAX_VALUE;
 403             ECKeyPair keyPair = Curve.generateKeyPair();
 404             PreKeyRecord record = new PreKeyRecord(preKeyId, keyPair);
 405
 406             records.add(record);
 407         }
 408
 409         account.addPreKeys(records);
 410         account.save();
 411
 412         return records;
 413     }
 414
 415     private SignedPreKeyRecord generateSignedPreKey(IdentityKeyPair identityKeyPair) {
 416         try {
 417             ECKeyPair keyPair = Curve.generateKeyPair();
 418             byte[] signature = Curve.calculateSignature(identityKeyPair.getPrivateKey(), keyPair.getPublicKey().serialize());
 419             SignedPreKeyRecord record = new SignedPreKeyRecord(account.getNextSignedPreKeyId(), System.currentTimeMillis(), keyPair, signature);
 420
 421             account.addSignedPreKey(record);
 422             account.save();
 423
 424             return record;
 425         } catch (InvalidKeyException e) {
 426             throw new AssertionError(e);
 427         }
 428     }
 429
 430     public void verifyAccount(String verificationCode, String pin) throws IOException {
 431         verificationCode = verificationCode.replace("-", "");
 432         account.setSignalingKey(KeyUtils.createSignalingKey());
 433         // TODO make unrestricted unidentified access configurable
 434         UUID uuid = accountManager.verifyAccountWithCode(verificationCode, account.getSignalingKey(), account.getSignalProtocolStore().getLocalRegistrationId(), true, pin, null, getSelfUnidentifiedAccessKey(), false, BaseConfig.capabilities);
 435
 436         //accountManager.setGcmId(Optional.of(GoogleCloudMessaging.getInstance(this).register(REGISTRATION_ID)));
 437         account.setRegistered(true);
 438         account.setUuid(uuid);
 439         account.setRegistrationLockPin(pin);
 440         account.getSignalProtocolStore().saveIdentity(account.getSelfAddress(), account.getSignalProtocolStore().getIdentityKeyPair().getPublicKey(), TrustLevel.TRUSTED_VERIFIED);
 441
 442         refreshPreKeys();
 443         account.save();
 444     }
 445
 446     public void setRegistrationLockPin(Optional<String> pin) throws IOException {
 447         if (pin.isPresent()) {
 448             account.setRegistrationLockPin(pin.get());
 449             throw new RuntimeException("Not implemented anymore, will be replaced with KBS");
 450         } else {
 451             account.setRegistrationLockPin(null);
 452             accountManager.removeV1Pin();
 453         }
 454         account.save();
 455     }
 456
 457     private void refreshPreKeys() throws IOException {
 458         List<PreKeyRecord> oneTimePreKeys = generatePreKeys();
 459         final IdentityKeyPair identityKeyPair = account.getSignalProtocolStore().getIdentityKeyPair();
 460         SignedPreKeyRecord signedPreKeyRecord = generateSignedPreKey(identityKeyPair);
 461
 462         accountManager.setPreKeys(getIdentity(), signedPreKeyRecord, oneTimePreKeys);
 463     }
 464
 465     private SignalServiceMessageReceiver getMessageReceiver() {
 466         return new SignalServiceMessageReceiver(BaseConfig.serviceConfiguration, account.getUuid(), account.getUsername(), account.getPassword(), account.getDeviceId(), account.getSignalingKey(), BaseConfig.USER_AGENT, null, timer);
 467     }
 468
 469     private SignalServiceMessageSender getMessageSender() {
 470         return new SignalServiceMessageSender(BaseConfig.serviceConfiguration, account.getUuid(), account.getUsername(), account.getPassword(),
 471                 account.getDeviceId(), account.getSignalProtocolStore(), BaseConfig.USER_AGENT, account.isMultiDevice(), Optional.fromNullable(messagePipe), Optional.fromNullable(unidentifiedMessagePipe), Optional.absent());
 472     }
 473
 474     private SignalServiceProfile getRecipientProfile(SignalServiceAddress address, Optional<UnidentifiedAccess> unidentifiedAccess) throws IOException {
 475         SignalServiceMessagePipe pipe = unidentifiedMessagePipe != null && unidentifiedAccess.isPresent() ? unidentifiedMessagePipe
 476                 : messagePipe;
 477
 478         if (pipe != null) {
 479             try {
 480                 return pipe.getProfile(address, Optional.absent(), unidentifiedAccess, SignalServiceProfile.RequestType.PROFILE).getProfile();
 481             } catch (IOException ignored) {
 482             }
 483         }
 484
 485         SignalServiceMessageReceiver receiver = getMessageReceiver();
 486         try {
 487             return receiver.retrieveProfile(address, Optional.absent(), unidentifiedAccess, SignalServiceProfile.RequestType.PROFILE).getProfile();
 488         } catch (VerificationFailedException e) {
 489             throw new AssertionError(e);
 490         }
 491     }
 492
 493     private Optional<SignalServiceAttachmentStream> createGroupAvatarAttachment(byte[] groupId) throws IOException {
 494         File file = getGroupAvatarFile(groupId);
 495         if (!file.exists()) {
 496             return Optional.absent();
 497         }
 498
 499         return Optional.of(Utils.createAttachment(file));
 500     }
 501
 502     private Optional<SignalServiceAttachmentStream> createContactAvatarAttachment(String number) throws IOException {
 503         File file = getContactAvatarFile(number);
 504         if (!file.exists()) {
 505             return Optional.absent();
 506         }
 507
 508         return Optional.of(Utils.createAttachment(file));
 509     }
 510
 511     private GroupInfo getGroupForSending(byte[] groupId) throws GroupNotFoundException, NotAGroupMemberException {
 512         GroupInfo g = account.getGroupStore().getGroup(groupId);
 513         if (g == null) {
 514             throw new GroupNotFoundException(groupId);
 515         }
 516         if (!g.isMember(account.getSelfAddress())) {
 517             throw new NotAGroupMemberException(groupId, g.name);
 518         }
 519         return g;
 520     }
 521
 522     public List<GroupInfo> getGroups() {
 523         return account.getGroupStore().getGroups();
 524     }
 525
 526     @Override
 527     public long sendGroupMessage(String messageText, List<String> attachments,
 528                                  byte[] groupId)
 529             throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 530         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 531         if (attachments != null) {
 532             messageBuilder.withAttachments(Utils.getSignalServiceAttachments(attachments));
 533         }
 534         if (groupId != null) {
 535             SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.DELIVER)
 536                     .withId(groupId)
 537                     .build();
 538             messageBuilder.asGroupMessage(group);
 539         }
 540
 541         final GroupInfo g = getGroupForSending(groupId);
 542
 543         messageBuilder.withExpiration(g.messageExpirationTime);
 544
 545         return sendMessageLegacy(messageBuilder, g.getMembersWithout(account.getSelfAddress()));
 546     }
 547
 548     public void sendGroupMessageReaction(String emoji, boolean remove, String targetAuthor,
 549                                          long targetSentTimestamp, byte[] groupId)
 550             throws IOException, EncapsulatedExceptions, AttachmentInvalidException, InvalidNumberException {
 551         SignalServiceDataMessage.Reaction reaction = new SignalServiceDataMessage.Reaction(emoji, remove, canonicalizeAndResolveSignalServiceAddress(targetAuthor), targetSentTimestamp);
 552         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 553                 .withReaction(reaction);
 554         if (groupId != null) {
 555             SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.DELIVER)
 556                     .withId(groupId)
 557                     .build();
 558             messageBuilder.asGroupMessage(group);
 559         }
 560         final GroupInfo g = getGroupForSending(groupId);
 561         sendMessageLegacy(messageBuilder, g.getMembersWithout(account.getSelfAddress()));
 562     }
 563
 564     public void sendQuitGroupMessage(byte[] groupId) throws GroupNotFoundException, IOException, EncapsulatedExceptions {
 565         SignalServiceGroup group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.QUIT)
 566                 .withId(groupId)
 567                 .build();
 568
 569         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 570                 .asGroupMessage(group);
 571
 572         final GroupInfo g = getGroupForSending(groupId);
 573         g.removeMember(account.getSelfAddress());
 574         account.getGroupStore().updateGroup(g);
 575
 576         sendMessageLegacy(messageBuilder, g.getMembersWithout(account.getSelfAddress()));
 577     }
 578
 579     private byte[] sendUpdateGroupMessage(byte[] groupId, String name, Collection<SignalServiceAddress> members, String avatarFile) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException {
 580         GroupInfo g;
 581         if (groupId == null) {
 582             // Create new group
 583             g = new GroupInfo(KeyUtils.createGroupId());
 584             g.addMembers(Collections.singleton(account.getSelfAddress()));
 585         } else {
 586             g = getGroupForSending(groupId);
 587         }
 588
 589         if (name != null) {
 590             g.name = name;
 591         }
 592
 593         if (members != null) {
 594             final Set<String> newE164Members = new HashSet<>();
 595             for (SignalServiceAddress member : members) {
 596                 if (g.isMember(member) || !member.getNumber().isPresent()) {
 597                     continue;
 598                 }
 599                 newE164Members.add(member.getNumber().get());
 600             }
 601
 602             final List<ContactTokenDetails> contacts = accountManager.getContacts(newE164Members);
 603             if (contacts.size() != newE164Members.size()) {
 604                 // Some of the new members are not registered on Signal
 605                 for (ContactTokenDetails contact : contacts) {
 606                     newE164Members.remove(contact.getNumber());
 607                 }
 608                 System.err.println("Failed to add members " + Util.join(", ", newE164Members) + " to group: Not registered on Signal");
 609                 System.err.println("Aborting…");
 610                 System.exit(1);
 611             }
 612
 613             g.addMembers(members);
 614         }
 615
 616         if (avatarFile != null) {
 617             IOUtils.createPrivateDirectories(avatarsPath);
 618             File aFile = getGroupAvatarFile(g.groupId);
 619             Files.copy(Paths.get(avatarFile), aFile.toPath(), StandardCopyOption.REPLACE_EXISTING);
 620         }
 621
 622         account.getGroupStore().updateGroup(g);
 623
 624         SignalServiceDataMessage.Builder messageBuilder = getGroupUpdateMessageBuilder(g);
 625
 626         sendMessageLegacy(messageBuilder, g.getMembersWithout(account.getSelfAddress()));
 627         return g.groupId;
 628     }
 629
 630     private void sendUpdateGroupMessage(byte[] groupId, SignalServiceAddress recipient) throws IOException, EncapsulatedExceptions {
 631         if (groupId == null) {
 632             return;
 633         }
 634         GroupInfo g = getGroupForSending(groupId);
 635
 636         if (!g.isMember(recipient)) {
 637             return;
 638         }
 639
 640         SignalServiceDataMessage.Builder messageBuilder = getGroupUpdateMessageBuilder(g);
 641
 642         // Send group message only to the recipient who requested it
 643         sendMessageLegacy(messageBuilder, Collections.singleton(recipient));
 644     }
 645
 646     private SignalServiceDataMessage.Builder getGroupUpdateMessageBuilder(GroupInfo g) {
 647         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.UPDATE)
 648                 .withId(g.groupId)
 649                 .withName(g.name)
 650                 .withMembers(new ArrayList<>(g.getMembers()));
 651
 652         File aFile = getGroupAvatarFile(g.groupId);
 653         if (aFile.exists()) {
 654             try {
 655                 group.withAvatar(Utils.createAttachment(aFile));
 656             } catch (IOException e) {
 657                 throw new AttachmentInvalidException(aFile.toString(), e);
 658             }
 659         }
 660
 661         return SignalServiceDataMessage.newBuilder()
 662                 .asGroupMessage(group.build())
 663                 .withExpiration(g.messageExpirationTime);
 664     }
 665
 666     private void sendGroupInfoRequest(byte[] groupId, SignalServiceAddress recipient) throws IOException, EncapsulatedExceptions {
 667         if (groupId == null) {
 668             return;
 669         }
 670
 671         SignalServiceGroup.Builder group = SignalServiceGroup.newBuilder(SignalServiceGroup.Type.REQUEST_INFO)
 672                 .withId(groupId);
 673
 674         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 675                 .asGroupMessage(group.build());
 676
 677         // Send group info request message to the recipient who sent us a message with this groupId
 678         sendMessageLegacy(messageBuilder, Collections.singleton(recipient));
 679     }
 680
 681     private void sendReceipt(SignalServiceAddress remoteAddress, long messageId) throws IOException, UntrustedIdentityException {
 682         SignalServiceReceiptMessage receiptMessage = new SignalServiceReceiptMessage(SignalServiceReceiptMessage.Type.DELIVERY,
 683                 Collections.singletonList(messageId),
 684                 System.currentTimeMillis());
 685
 686         getMessageSender().sendReceipt(remoteAddress, getAccessFor(remoteAddress), receiptMessage);
 687     }
 688
 689     @Override
 690     public long sendMessage(String message, List<String> attachments, String recipient)
 691             throws EncapsulatedExceptions, AttachmentInvalidException, IOException, InvalidNumberException {
 692         List<String> recipients = new ArrayList<>(1);
 693         recipients.add(recipient);
 694         return sendMessage(message, attachments, recipients);
 695     }
 696
 697     @Override
 698     public long sendMessage(String messageText, List<String> attachments,
 699                             List<String> recipients)
 700             throws IOException, EncapsulatedExceptions, AttachmentInvalidException, InvalidNumberException {
 701         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder().withBody(messageText);
 702         if (attachments != null) {
 703             List<SignalServiceAttachment> attachmentStreams = Utils.getSignalServiceAttachments(attachments);
 704
 705             // Upload attachments here, so we only upload once even for multiple recipients
 706             SignalServiceMessageSender messageSender = getMessageSender();
 707             List<SignalServiceAttachment> attachmentPointers = new ArrayList<>(attachmentStreams.size());
 708             for (SignalServiceAttachment attachment : attachmentStreams) {
 709                 if (attachment.isStream()) {
 710                     attachmentPointers.add(messageSender.uploadAttachment(attachment.asStream()));
 711                 } else if (attachment.isPointer()) {
 712                     attachmentPointers.add(attachment.asPointer());
 713                 }
 714             }
 715
 716             messageBuilder.withAttachments(attachmentPointers);
 717         }
 718         return sendMessageLegacy(messageBuilder, getSignalServiceAddresses(recipients));
 719     }
 720
 721     public void sendMessageReaction(String emoji, boolean remove, String targetAuthor,
 722                                     long targetSentTimestamp, List<String> recipients)
 723             throws IOException, EncapsulatedExceptions, AttachmentInvalidException, InvalidNumberException {
 724         SignalServiceDataMessage.Reaction reaction = new SignalServiceDataMessage.Reaction(emoji, remove, canonicalizeAndResolveSignalServiceAddress(targetAuthor), targetSentTimestamp);
 725         final SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 726                 .withReaction(reaction);
 727         sendMessageLegacy(messageBuilder, getSignalServiceAddresses(recipients));
 728     }
 729
 730     @Override
 731     public void sendEndSessionMessage(List<String> recipients) throws IOException, EncapsulatedExceptions, InvalidNumberException {
 732         SignalServiceDataMessage.Builder messageBuilder = SignalServiceDataMessage.newBuilder()
 733                 .asEndSessionMessage();
 734
 735         sendMessageLegacy(messageBuilder, getSignalServiceAddresses(recipients));
 736     }
 737
 738     @Override
 739     public String getContactName(String number) throws InvalidNumberException {
 740         ContactInfo contact = account.getContactStore().getContact(canonicalizeAndResolveSignalServiceAddress(number));
 741         if (contact == null) {
 742             return "";
 743         } else {
 744             return contact.name;
 745         }
 746     }
 747
 748     @Override
 749     public void setContactName(String number, String name) throws InvalidNumberException {
 750         final SignalServiceAddress address = canonicalizeAndResolveSignalServiceAddress(number);
 751         ContactInfo contact = account.getContactStore().getContact(address);
 752         if (contact == null) {
 753             contact = new ContactInfo(address);
 754             System.err.println("Add contact " + contact.number + " named " + name);
 755         } else {
 756             System.err.println("Updating contact " + contact.number + " name " + contact.name + " -> " + name);
 757         }
 758         contact.name = name;
 759         account.getContactStore().updateContact(contact);
 760         account.save();
 761     }
 762
 763     @Override
 764     public void setContactBlocked(String number, boolean blocked) throws InvalidNumberException {
 765         setContactBlocked(canonicalizeAndResolveSignalServiceAddress(number), blocked);
 766     }
 767
 768     private void setContactBlocked(SignalServiceAddress address, boolean blocked) {
 769         ContactInfo contact = account.getContactStore().getContact(address);
 770         if (contact == null) {
 771             contact = new ContactInfo(address);
 772             System.err.println("Adding and " + (blocked ? "blocking" : "unblocking") + " contact " + address.getNumber().orNull());
 773         } else {
 774             System.err.println((blocked ? "Blocking" : "Unblocking") + " contact " + address.getNumber().orNull());
 775         }
 776         contact.blocked = blocked;
 777         account.getContactStore().updateContact(contact);
 778         account.save();
 779     }
 780
 781     @Override
 782     public void setGroupBlocked(final byte[] groupId, final boolean blocked) throws GroupNotFoundException {
 783         GroupInfo group = getGroup(groupId);
 784         if (group == null) {
 785             throw new GroupNotFoundException(groupId);
 786         } else {
 787             System.err.println((blocked ? "Blocking" : "Unblocking") + " group " + Base64.encodeBytes(groupId));
 788             group.blocked = blocked;
 789             account.getGroupStore().updateGroup(group);
 790             account.save();
 791         }
 792     }
 793
 794     @Override
 795     public List<byte[]> getGroupIds() {
 796         List<GroupInfo> groups = getGroups();
 797         List<byte[]> ids = new ArrayList<>(groups.size());
 798         for (GroupInfo group : groups) {
 799             ids.add(group.groupId);
 800         }
 801         return ids;
 802     }
 803
 804     @Override
 805     public String getGroupName(byte[] groupId) {
 806         GroupInfo group = getGroup(groupId);
 807         if (group == null) {
 808             return "";
 809         } else {
 810             return group.name;
 811         }
 812     }
 813
 814     @Override
 815     public List<String> getGroupMembers(byte[] groupId) {
 816         GroupInfo group = getGroup(groupId);
 817         if (group == null) {
 818             return Collections.emptyList();
 819         } else {
 820             return new ArrayList<>(group.getMembersE164());
 821         }
 822     }
 823
 824     @Override
 825     public byte[] updateGroup(byte[] groupId, String name, List<String> members, String avatar) throws IOException, EncapsulatedExceptions, GroupNotFoundException, AttachmentInvalidException, InvalidNumberException {
 826         if (groupId.length == 0) {
 827             groupId = null;
 828         }
 829         if (name.isEmpty()) {
 830             name = null;
 831         }
 832         if (members.size() == 0) {
 833             members = null;
 834         }
 835         if (avatar.isEmpty()) {
 836             avatar = null;
 837         }
 838         return sendUpdateGroupMessage(groupId, name, members == null ? null : getSignalServiceAddresses(members), avatar);
 839     }
 840
 841     /**
 842      * Change the expiration timer for a contact
 843      */
 844     public void setExpirationTimer(SignalServiceAddress address, int messageExpirationTimer) {
 845         ContactInfo c = account.getContactStore().getContact(address);
 846         c.messageExpirationTime = messageExpirationTimer;
 847         account.getContactStore().updateContact(c);
 848     }
 849
 850     /**
 851      * Change the expiration timer for a group
 852      */
 853     public void setExpirationTimer(byte[] groupId, int messageExpirationTimer) {
 854         GroupInfo g = account.getGroupStore().getGroup(groupId);
 855         g.messageExpirationTime = messageExpirationTimer;
 856         account.getGroupStore().updateGroup(g);
 857     }
 858
 859     /**
 860      * Upload the sticker pack from path.
 861      *
 862      * @param path Path can be a path to a manifest.json file or to a zip file that contains a manifest.json file
 863      * @return if successful, returns the URL to install the sticker pack in the signal app
 864      */
 865     public String uploadStickerPack(String path) throws IOException, StickerPackInvalidException {
 866         SignalServiceStickerManifestUpload manifest = getSignalServiceStickerManifestUpload(path);
 867
 868         SignalServiceMessageSender messageSender = getMessageSender();
 869
 870         byte[] packKey = KeyUtils.createStickerUploadKey();
 871         String packId = messageSender.uploadStickerManifest(manifest, packKey);
 872
 873         try {
 874             return new URI("https", "signal.art", "/addstickers/", "pack_id=" + URLEncoder.encode(packId, "utf-8") + "&pack_key=" + URLEncoder.encode(Hex.toStringCondensed(packKey), "utf-8"))
 875                     .toString();
 876         } catch (URISyntaxException e) {
 877             throw new AssertionError(e);
 878         }
 879     }
 880
 881     private SignalServiceStickerManifestUpload getSignalServiceStickerManifestUpload(final String path) throws IOException, StickerPackInvalidException {
 882         ZipFile zip = null;
 883         String rootPath = null;
 884
 885         final File file = new File(path);
 886         if (file.getName().endsWith(".zip")) {
 887             zip = new ZipFile(file);
 888         } else if (file.getName().equals("manifest.json")) {
 889             rootPath = file.getParent();
 890         } else {
 891             throw new StickerPackInvalidException("Could not find manifest.json");
 892         }
 893
 894         JsonStickerPack pack = parseStickerPack(rootPath, zip);
 895
 896         if (pack.stickers == null) {
 897             throw new StickerPackInvalidException("Must set a 'stickers' field.");
 898         }
 899
 900         if (pack.stickers.isEmpty()) {
 901             throw new StickerPackInvalidException("Must include stickers.");
 902         }
 903
 904         List<StickerInfo> stickers = new ArrayList<>(pack.stickers.size());
 905         for (JsonStickerPack.JsonSticker sticker : pack.stickers) {
 906             if (sticker.file == null) {
 907                 throw new StickerPackInvalidException("Must set a 'file' field on each sticker.");
 908             }
 909
 910             Pair<InputStream, Long> data;
 911             try {
 912                 data = getInputStreamAndLength(rootPath, zip, sticker.file);
 913             } catch (IOException ignored) {
 914                 throw new StickerPackInvalidException("Could not find find " + sticker.file);
 915             }
 916
 917             StickerInfo stickerInfo = new StickerInfo(data.first(), data.second(), Optional.fromNullable(sticker.emoji).or(""));
 918             stickers.add(stickerInfo);
 919         }
 920
 921         StickerInfo cover = null;
 922         if (pack.cover != null) {
 923             if (pack.cover.file == null) {
 924                 throw new StickerPackInvalidException("Must set a 'file' field on the cover.");
 925             }
 926
 927             Pair<InputStream, Long> data;
 928             try {
 929                 data = getInputStreamAndLength(rootPath, zip, pack.cover.file);
 930             } catch (IOException ignored) {
 931                 throw new StickerPackInvalidException("Could not find find " + pack.cover.file);
 932             }
 933
 934             cover = new StickerInfo(data.first(), data.second(), Optional.fromNullable(pack.cover.emoji).or(""));
 935         }
 936
 937         return new SignalServiceStickerManifestUpload(
 938                 pack.title,
 939                 pack.author,
 940                 cover,
 941                 stickers);
 942     }
 943
 944     private static JsonStickerPack parseStickerPack(String rootPath, ZipFile zip) throws IOException {
 945         InputStream inputStream;
 946         if (zip != null) {
 947             inputStream = zip.getInputStream(zip.getEntry("manifest.json"));
 948         } else {
 949             inputStream = new FileInputStream((new File(rootPath, "manifest.json")));
 950         }
 951         return new ObjectMapper().readValue(inputStream, JsonStickerPack.class);
 952     }
 953
 954     private static Pair<InputStream, Long> getInputStreamAndLength(final String rootPath, final ZipFile zip, final String subfile) throws IOException {
 955         if (zip != null) {
 956             final ZipEntry entry = zip.getEntry(subfile);
 957             return new Pair<>(zip.getInputStream(entry), entry.getSize());
 958         } else {
 959             final File file = new File(rootPath, subfile);
 960             return new Pair<>(new FileInputStream(file), file.length());
 961         }
 962     }
 963
 964     private void requestSyncGroups() throws IOException {
 965         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.GROUPS).build();
 966         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 967         try {
 968             sendSyncMessage(message);
 969         } catch (UntrustedIdentityException e) {
 970             e.printStackTrace();
 971         }
 972     }
 973
 974     private void requestSyncContacts() throws IOException {
 975         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONTACTS).build();
 976         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 977         try {
 978             sendSyncMessage(message);
 979         } catch (UntrustedIdentityException e) {
 980             e.printStackTrace();
 981         }
 982     }
 983
 984     private void requestSyncBlocked() throws IOException {
 985         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.BLOCKED).build();
 986         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 987         try {
 988             sendSyncMessage(message);
 989         } catch (UntrustedIdentityException e) {
 990             e.printStackTrace();
 991         }
 992     }
 993
 994     private void requestSyncConfiguration() throws IOException {
 995         SignalServiceProtos.SyncMessage.Request r = SignalServiceProtos.SyncMessage.Request.newBuilder().setType(SignalServiceProtos.SyncMessage.Request.Type.CONFIGURATION).build();
 996         SignalServiceSyncMessage message = SignalServiceSyncMessage.forRequest(new RequestMessage(r));
 997         try {
 998             sendSyncMessage(message);
 999         } catch (UntrustedIdentityException e) {
1000             e.printStackTrace();
1001         }
1002     }
1003
1004     private byte[] getSenderCertificate() {
1005         // TODO support UUID capable sender certificates
1006         // byte[] certificate = accountManager.getSenderCertificate();
1007         byte[] certificate;
1008         try {
1009             certificate = accountManager.getSenderCertificateLegacy();
1010         } catch (IOException e) {
1011             System.err.println("Failed to get sender certificate: " + e);
1012             return null;
1013         }
1014         // TODO cache for a day
1015         return certificate;
1016     }
1017
1018     private byte[] getSelfUnidentifiedAccessKey() {
1019         return UnidentifiedAccess.deriveAccessKeyFrom(account.getProfileKey());
1020     }
1021
1022     private static SignalProfile decryptProfile(SignalServiceProfile encryptedProfile, ProfileKey profileKey) throws IOException {
1023         ProfileCipher profileCipher = new ProfileCipher(profileKey);
1024         try {
1025             return new SignalProfile(
1026                     encryptedProfile.getIdentityKey(),
1027                     encryptedProfile.getName() == null ? null : new String(profileCipher.decryptName(Base64.decode(encryptedProfile.getName()))),
1028                     encryptedProfile.getAvatar(),
1029                     encryptedProfile.getUnidentifiedAccess() == null || !profileCipher.verifyUnidentifiedAccess(Base64.decode(encryptedProfile.getUnidentifiedAccess())) ? null : encryptedProfile.getUnidentifiedAccess(),
1030                     encryptedProfile.isUnrestrictedUnidentifiedAccess()
1031             );
1032         } catch (InvalidCiphertextException e) {
1033             return null;
1034         }
1035     }
1036
1037     private byte[] getTargetUnidentifiedAccessKey(SignalServiceAddress recipient) {
1038         ContactInfo contact = account.getContactStore().getContact(recipient);
1039         if (contact == null || contact.profileKey == null) {
1040             return null;
1041         }
1042         ProfileKey theirProfileKey;
1043         try {
1044             theirProfileKey = new ProfileKey(Base64.decode(contact.profileKey));
1045         } catch (InvalidInputException | IOException e) {
1046             throw new AssertionError(e);
1047         }
1048         SignalProfile targetProfile;
1049         try {
1050             targetProfile = decryptProfile(getRecipientProfile(recipient, Optional.absent()), theirProfileKey);
1051         } catch (IOException e) {
1052             System.err.println("Failed to get recipient profile: " + e);
1053             return null;
1054         }
1055
1056         if (targetProfile == null || targetProfile.getUnidentifiedAccess() == null) {
1057             return null;
1058         }
1059
1060         if (targetProfile.isUnrestrictedUnidentifiedAccess()) {
1061             return KeyUtils.createUnrestrictedUnidentifiedAccess();
1062         }
1063
1064         return UnidentifiedAccess.deriveAccessKeyFrom(theirProfileKey);
1065     }
1066
1067     private Optional<UnidentifiedAccessPair> getAccessForSync() {
1068         byte[] selfUnidentifiedAccessKey = getSelfUnidentifiedAccessKey();
1069         byte[] selfUnidentifiedAccessCertificate = getSenderCertificate();
1070
1071         if (selfUnidentifiedAccessKey == null || selfUnidentifiedAccessCertificate == null) {
1072             return Optional.absent();
1073         }
1074
1075         try {
1076             return Optional.of(new UnidentifiedAccessPair(
1077                     new UnidentifiedAccess(selfUnidentifiedAccessKey, selfUnidentifiedAccessCertificate),
1078                     new UnidentifiedAccess(selfUnidentifiedAccessKey, selfUnidentifiedAccessCertificate)
1079             ));
1080         } catch (InvalidCertificateException e) {
1081             return Optional.absent();
1082         }
1083     }
1084
1085     private List<Optional<UnidentifiedAccessPair>> getAccessFor(Collection<SignalServiceAddress> recipients) {
1086         List<Optional<UnidentifiedAccessPair>> result = new ArrayList<>(recipients.size());
1087         for (SignalServiceAddress recipient : recipients) {
1088             result.add(getAccessFor(recipient));
1089         }
1090         return result;
1091     }
1092
1093     private Optional<UnidentifiedAccessPair> getAccessFor(SignalServiceAddress recipient) {
1094         byte[] recipientUnidentifiedAccessKey = getTargetUnidentifiedAccessKey(recipient);
1095         byte[] selfUnidentifiedAccessKey = getSelfUnidentifiedAccessKey();
1096         byte[] selfUnidentifiedAccessCertificate = getSenderCertificate();
1097
1098         if (recipientUnidentifiedAccessKey == null || selfUnidentifiedAccessKey == null || selfUnidentifiedAccessCertificate == null) {
1099             return Optional.absent();
1100         }
1101
1102         try {
1103             return Optional.of(new UnidentifiedAccessPair(
1104                     new UnidentifiedAccess(recipientUnidentifiedAccessKey, selfUnidentifiedAccessCertificate),
1105                     new UnidentifiedAccess(selfUnidentifiedAccessKey, selfUnidentifiedAccessCertificate)
1106             ));
1107         } catch (InvalidCertificateException e) {
1108             return Optional.absent();
1109         }
1110     }
1111
1112     private Optional<UnidentifiedAccess> getUnidentifiedAccess(SignalServiceAddress recipient) {
1113         Optional<UnidentifiedAccessPair> unidentifiedAccess = getAccessFor(recipient);
1114
1115         if (unidentifiedAccess.isPresent()) {
1116             return unidentifiedAccess.get().getTargetUnidentifiedAccess();
1117         }
1118
1119         return Optional.absent();
1120     }
1121
1122     private void sendSyncMessage(SignalServiceSyncMessage message)
1123             throws IOException, UntrustedIdentityException {
1124         SignalServiceMessageSender messageSender = getMessageSender();
1125         try {
1126             messageSender.sendMessage(message, getAccessForSync());
1127         } catch (UntrustedIdentityException e) {
1128             account.getSignalProtocolStore().saveIdentity(resolveSignalServiceAddress(e.getIdentifier()), e.getIdentityKey(), TrustLevel.UNTRUSTED);
1129             throw e;
1130         }
1131     }
1132
1133     /**
1134      * This method throws an EncapsulatedExceptions exception instead of returning a list of SendMessageResult.
1135      */
1136     private long sendMessageLegacy(SignalServiceDataMessage.Builder messageBuilder, Collection<SignalServiceAddress> recipients)
1137             throws EncapsulatedExceptions, IOException {
1138         final long timestamp = System.currentTimeMillis();
1139         messageBuilder.withTimestamp(timestamp);
1140         List<SendMessageResult> results = sendMessage(messageBuilder, recipients);
1141
1142         List<UntrustedIdentityException> untrustedIdentities = new LinkedList<>();
1143         List<UnregisteredUserException> unregisteredUsers = new LinkedList<>();
1144         List<NetworkFailureException> networkExceptions = new LinkedList<>();
1145
1146         for (SendMessageResult result : results) {
1147             if (result.isUnregisteredFailure()) {
1148                 unregisteredUsers.add(new UnregisteredUserException(result.getAddress().getLegacyIdentifier(), null));
1149             } else if (result.isNetworkFailure()) {
1150                 networkExceptions.add(new NetworkFailureException(result.getAddress().getLegacyIdentifier(), null));
1151             } else if (result.getIdentityFailure() != null) {
1152                 untrustedIdentities.add(new UntrustedIdentityException("Untrusted", result.getAddress().getLegacyIdentifier(), result.getIdentityFailure().getIdentityKey()));
1153             }
1154         }
1155         if (!untrustedIdentities.isEmpty() || !unregisteredUsers.isEmpty() || !networkExceptions.isEmpty()) {
1156             throw new EncapsulatedExceptions(untrustedIdentities, unregisteredUsers, networkExceptions);
1157         }
1158         return timestamp;
1159     }
1160
1161     private Collection<SignalServiceAddress> getSignalServiceAddresses(Collection<String> numbers) throws InvalidNumberException {
1162         final Set<SignalServiceAddress> signalServiceAddresses = new HashSet<>(numbers.size());
1163
1164         for (String number : numbers) {
1165             signalServiceAddresses.add(canonicalizeAndResolveSignalServiceAddress(number));
1166         }
1167         return signalServiceAddresses;
1168     }
1169
1170     private List<SendMessageResult> sendMessage(SignalServiceDataMessage.Builder messageBuilder, Collection<SignalServiceAddress> recipients)
1171             throws IOException {
1172         if (messagePipe == null) {
1173             messagePipe = getMessageReceiver().createMessagePipe();
1174         }
1175         if (unidentifiedMessagePipe == null) {
1176             unidentifiedMessagePipe = getMessageReceiver().createUnidentifiedMessagePipe();
1177         }
1178         SignalServiceDataMessage message = null;
1179         try {
1180             SignalServiceMessageSender messageSender = getMessageSender();
1181
1182             message = messageBuilder.build();
1183             if (message.getGroupContext().isPresent()) {
1184                 try {
1185                     final boolean isRecipientUpdate = false;
1186                     List<SendMessageResult> result = messageSender.sendMessage(new ArrayList<>(recipients), getAccessFor(recipients), isRecipientUpdate, message);
1187                     for (SendMessageResult r : result) {
1188                         if (r.getIdentityFailure() != null) {
1189                             account.getSignalProtocolStore().saveIdentity(r.getAddress(), r.getIdentityFailure().getIdentityKey(), TrustLevel.UNTRUSTED);
1190                         }
1191                     }
1192                     return result;
1193                 } catch (UntrustedIdentityException e) {
1194                     account.getSignalProtocolStore().saveIdentity(resolveSignalServiceAddress(e.getIdentifier()), e.getIdentityKey(), TrustLevel.UNTRUSTED);
1195                     return Collections.emptyList();
1196                 }
1197             } else if (recipients.size() == 1 && recipients.contains(account.getSelfAddress())) {
1198                 SignalServiceAddress recipient = account.getSelfAddress();
1199                 final Optional<UnidentifiedAccessPair> unidentifiedAccess = getAccessFor(recipient);
1200                 SentTranscriptMessage transcript = new SentTranscriptMessage(Optional.of(recipient),
1201                         message.getTimestamp(),
1202                         message,
1203                         message.getExpiresInSeconds(),
1204                         Collections.singletonMap(recipient, unidentifiedAccess.isPresent()),
1205                         false);
1206                 SignalServiceSyncMessage syncMessage = SignalServiceSyncMessage.forSentTranscript(transcript);
1207
1208                 List<SendMessageResult> results = new ArrayList<>(recipients.size());
1209                 try {
1210                     messageSender.sendMessage(syncMessage, unidentifiedAccess);
1211                 } catch (UntrustedIdentityException e) {
1212                     account.getSignalProtocolStore().saveIdentity(resolveSignalServiceAddress(e.getIdentifier()), e.getIdentityKey(), TrustLevel.UNTRUSTED);
1213                     results.add(SendMessageResult.identityFailure(recipient, e.getIdentityKey()));
1214                 }
1215                 return results;
1216             } else {
1217                 // Send to all individually, so sync messages are sent correctly
1218                 List<SendMessageResult> results = new ArrayList<>(recipients.size());
1219                 for (SignalServiceAddress address : recipients) {
1220                     ContactInfo contact = account.getContactStore().getContact(address);
1221                     if (contact != null) {
1222                         messageBuilder.withExpiration(contact.messageExpirationTime);
1223                         messageBuilder.withProfileKey(account.getProfileKey().serialize());
1224                     } else {
1225                         messageBuilder.withExpiration(0);
1226                         messageBuilder.withProfileKey(null);
1227                     }
1228                     message = messageBuilder.build();
1229                     try {
1230                         SendMessageResult result = messageSender.sendMessage(address, getAccessFor(address), message);
1231                         results.add(result);
1232                     } catch (UntrustedIdentityException e) {
1233                         account.getSignalProtocolStore().saveIdentity(resolveSignalServiceAddress(e.getIdentifier()), e.getIdentityKey(), TrustLevel.UNTRUSTED);
1234                         results.add(SendMessageResult.identityFailure(address, e.getIdentityKey()));
1235                     }
1236                 }
1237                 return results;
1238             }
1239         } finally {
1240             if (message != null && message.isEndSession()) {
1241                 for (SignalServiceAddress recipient : recipients) {
1242                     handleEndSession(recipient);
1243                 }
1244             }
1245             account.save();
1246         }
1247     }
1248
1249     private SignalServiceContent decryptMessage(SignalServiceEnvelope envelope) throws InvalidMetadataMessageException, ProtocolInvalidMessageException, ProtocolDuplicateMessageException, ProtocolLegacyMessageException, ProtocolInvalidKeyIdException, InvalidMetadataVersionException, ProtocolInvalidVersionException, ProtocolNoSessionException, ProtocolInvalidKeyException, SelfSendException, UnsupportedDataMessageException, org.whispersystems.libsignal.UntrustedIdentityException {
1250         SignalServiceCipher cipher = new SignalServiceCipher(account.getSelfAddress(), account.getSignalProtocolStore(), Utils.getCertificateValidator());
1251         try {
1252             return cipher.decrypt(envelope);
1253         } catch (ProtocolUntrustedIdentityException e) {
1254             if (e.getCause() instanceof org.whispersystems.libsignal.UntrustedIdentityException) {
1255                 org.whispersystems.libsignal.UntrustedIdentityException identityException = (org.whispersystems.libsignal.UntrustedIdentityException) e.getCause();
1256                 account.getSignalProtocolStore().saveIdentity(resolveSignalServiceAddress(identityException.getName()), identityException.getUntrustedIdentity(), TrustLevel.UNTRUSTED);
1257                 throw identityException;
1258             }
1259             throw new AssertionError(e);
1260         }
1261     }
1262
1263     private void handleEndSession(SignalServiceAddress source) {
1264         account.getSignalProtocolStore().deleteAllSessions(source);
1265     }
1266
1267     private void handleSignalServiceDataMessage(SignalServiceDataMessage message, boolean isSync, SignalServiceAddress source, SignalServiceAddress destination, boolean ignoreAttachments) {
1268         if (message.getGroupContext().isPresent() && message.getGroupContext().get().getGroupV1().isPresent()) {
1269             SignalServiceGroup groupInfo = message.getGroupContext().get().getGroupV1().get();
1270             GroupInfo group = account.getGroupStore().getGroup(groupInfo.getGroupId());
1271             switch (groupInfo.getType()) {
1272                 case UPDATE:
1273                     if (group == null) {
1274                         group = new GroupInfo(groupInfo.getGroupId());
1275                     }
1276
1277                     if (groupInfo.getAvatar().isPresent()) {
1278                         SignalServiceAttachment avatar = groupInfo.getAvatar().get();
1279                         if (avatar.isPointer()) {
1280                             try {
1281                                 retrieveGroupAvatarAttachment(avatar.asPointer(), group.groupId);
1282                             } catch (IOException | InvalidMessageException e) {
1283                                 System.err.println("Failed to retrieve group avatar (" + avatar.asPointer().getId() + "): " + e.getMessage());
1284                             }
1285                         }
1286                     }
1287
1288                     if (groupInfo.getName().isPresent()) {
1289                         group.name = groupInfo.getName().get();
1290                     }
1291
1292                     if (groupInfo.getMembers().isPresent()) {
1293                         group.addMembers(groupInfo.getMembers().get()
1294                                 .stream()
1295                                 .map(this::resolveSignalServiceAddress)
1296                                 .collect(Collectors.toSet()));
1297                     }
1298
1299                     account.getGroupStore().updateGroup(group);
1300                     break;
1301                 case DELIVER:
1302                     if (group == null) {
1303                         try {
1304                             sendGroupInfoRequest(groupInfo.getGroupId(), source);
1305                         } catch (IOException | EncapsulatedExceptions e) {
1306                             e.printStackTrace();
1307                         }
1308                     }
1309                     break;
1310                 case QUIT:
1311                     if (group == null) {
1312                         try {
1313                             sendGroupInfoRequest(groupInfo.getGroupId(), source);
1314                         } catch (IOException | EncapsulatedExceptions e) {
1315                             e.printStackTrace();
1316                         }
1317                     } else {
1318                         group.removeMember(source);
1319                         account.getGroupStore().updateGroup(group);
1320                     }
1321                     break;
1322                 case REQUEST_INFO:
1323                     if (group != null) {
1324                         try {
1325                             sendUpdateGroupMessage(groupInfo.getGroupId(), source);
1326                         } catch (IOException | EncapsulatedExceptions e) {
1327                             e.printStackTrace();
1328                         } catch (NotAGroupMemberException e) {
1329                             // We have left this group, so don't send a group update message
1330                         }
1331                     }
1332                     break;
1333             }
1334         }
1335         final SignalServiceAddress conversationPartnerAddress = isSync ? destination : source;
1336         if (message.isEndSession()) {
1337             handleEndSession(conversationPartnerAddress);
1338         }
1339         if (message.isExpirationUpdate() || message.getBody().isPresent()) {
1340             if (message.getGroupContext().isPresent() && message.getGroupContext().get().getGroupV1().isPresent()) {
1341                 SignalServiceGroup groupInfo = message.getGroupContext().get().getGroupV1().get();
1342                 GroupInfo group = account.getGroupStore().getGroup(groupInfo.getGroupId());
1343                 if (group == null) {
1344                     group = new GroupInfo(groupInfo.getGroupId());
1345                 }
1346                 if (group.messageExpirationTime != message.getExpiresInSeconds()) {
1347                     group.messageExpirationTime = message.getExpiresInSeconds();
1348                     account.getGroupStore().updateGroup(group);
1349                 }
1350             } else {
1351                 ContactInfo contact = account.getContactStore().getContact(conversationPartnerAddress);
1352                 if (contact == null) {
1353                     contact = new ContactInfo(conversationPartnerAddress);
1354                 }
1355                 if (contact.messageExpirationTime != message.getExpiresInSeconds()) {
1356                     contact.messageExpirationTime = message.getExpiresInSeconds();
1357                     account.getContactStore().updateContact(contact);
1358                 }
1359             }
1360         }
1361         if (message.getAttachments().isPresent() && !ignoreAttachments) {
1362             for (SignalServiceAttachment attachment : message.getAttachments().get()) {
1363                 if (attachment.isPointer()) {
1364                     try {
1365                         retrieveAttachment(attachment.asPointer());
1366                     } catch (IOException | InvalidMessageException e) {
1367                         System.err.println("Failed to retrieve attachment (" + attachment.asPointer().getId() + "): " + e.getMessage());
1368                     }
1369                 }
1370             }
1371         }
1372         if (message.getProfileKey().isPresent() && message.getProfileKey().get().length == 32) {
1373             if (source.matches(account.getSelfAddress())) {
1374                 try {
1375                     this.account.setProfileKey(new ProfileKey(message.getProfileKey().get()));
1376                 } catch (InvalidInputException ignored) {
1377                 }
1378                 ContactInfo contact = account.getContactStore().getContact(source);
1379                 if (contact != null) {
1380                     contact.profileKey = Base64.encodeBytes(message.getProfileKey().get());
1381                     account.getContactStore().updateContact(contact);
1382                 }
1383             } else {
1384                 ContactInfo contact = account.getContactStore().getContact(source);
1385                 if (contact == null) {
1386                     contact = new ContactInfo(source);
1387                 }
1388                 contact.profileKey = Base64.encodeBytes(message.getProfileKey().get());
1389                 account.getContactStore().updateContact(contact);
1390             }
1391         }
1392         if (message.getPreviews().isPresent()) {
1393             final List<SignalServiceDataMessage.Preview> previews = message.getPreviews().get();
1394             for (SignalServiceDataMessage.Preview preview : previews) {
1395                 if (preview.getImage().isPresent() && preview.getImage().get().isPointer()) {
1396                     SignalServiceAttachmentPointer attachment = preview.getImage().get().asPointer();
1397                     try {
1398                         retrieveAttachment(attachment);
1399                     } catch (IOException | InvalidMessageException e) {
1400                         System.err.println("Failed to retrieve attachment (" + attachment.getId() + "): " + e.getMessage());
1401                     }
1402                 }
1403             }
1404         }
1405     }
1406
1407     private void retryFailedReceivedMessages(ReceiveMessageHandler handler, boolean ignoreAttachments) {
1408         final File cachePath = new File(getMessageCachePath());
1409         if (!cachePath.exists()) {
1410             return;
1411         }
1412         for (final File dir : Objects.requireNonNull(cachePath.listFiles())) {
1413             if (!dir.isDirectory()) {
1414                 retryFailedReceivedMessage(handler, ignoreAttachments, dir);
1415                 continue;
1416             }
1417
1418             for (final File fileEntry : Objects.requireNonNull(dir.listFiles())) {
1419                 if (!fileEntry.isFile()) {
1420                     continue;
1421                 }
1422                 retryFailedReceivedMessage(handler, ignoreAttachments, fileEntry);
1423             }
1424             // Try to delete directory if empty
1425             dir.delete();
1426         }
1427     }
1428
1429     private void retryFailedReceivedMessage(final ReceiveMessageHandler handler, final boolean ignoreAttachments, final File fileEntry) {
1430         SignalServiceEnvelope envelope;
1431         try {
1432             envelope = Utils.loadEnvelope(fileEntry);
1433             if (envelope == null) {
1434                 return;
1435             }
1436         } catch (IOException e) {
1437             e.printStackTrace();
1438             return;
1439         }
1440         SignalServiceContent content = null;
1441         if (!envelope.isReceipt()) {
1442             try {
1443                 content = decryptMessage(envelope);
1444             } catch (Exception e) {
1445                 return;
1446             }
1447             handleMessage(envelope, content, ignoreAttachments);
1448         }
1449         account.save();
1450         handler.handleMessage(envelope, content, null);
1451         try {
1452             Files.delete(fileEntry.toPath());
1453         } catch (IOException e) {
1454             System.err.println("Failed to delete cached message file “" + fileEntry + "”: " + e.getMessage());
1455         }
1456     }
1457
1458     public void receiveMessages(long timeout, TimeUnit unit, boolean returnOnTimeout, boolean ignoreAttachments, ReceiveMessageHandler handler) throws IOException {
1459         retryFailedReceivedMessages(handler, ignoreAttachments);
1460         final SignalServiceMessageReceiver messageReceiver = getMessageReceiver();
1461
1462         try {
1463             if (messagePipe == null) {
1464                 messagePipe = messageReceiver.createMessagePipe();
1465             }
1466
1467             while (true) {
1468                 SignalServiceEnvelope envelope;
1469                 SignalServiceContent content = null;
1470                 Exception exception = null;
1471                 final long now = new Date().getTime();
1472                 try {
1473                     envelope = messagePipe.read(timeout, unit, envelope1 -> {
1474                         // store message on disk, before acknowledging receipt to the server
1475                         try {
1476                             File cacheFile = getMessageCacheFile(envelope1.getSourceE164().get(), now, envelope1.getTimestamp());
1477                             Utils.storeEnvelope(envelope1, cacheFile);
1478                         } catch (IOException e) {
1479                             System.err.println("Failed to store encrypted message in disk cache, ignoring: " + e.getMessage());
1480                         }
1481                     });
1482                 } catch (TimeoutException e) {
1483                     if (returnOnTimeout)
1484                         return;
1485                     continue;
1486                 } catch (InvalidVersionException e) {
1487                     System.err.println("Ignoring error: " + e.getMessage());
1488                     continue;
1489                 }
1490                 if (!envelope.isReceipt()) {
1491                     try {
1492                         content = decryptMessage(envelope);
1493                     } catch (Exception e) {
1494                         exception = e;
1495                     }
1496                     handleMessage(envelope, content, ignoreAttachments);
1497                 }
1498                 account.save();
1499                 if (!isMessageBlocked(envelope, content)) {
1500                     handler.handleMessage(envelope, content, exception);
1501                 }
1502                 if (!(exception instanceof org.whispersystems.libsignal.UntrustedIdentityException)) {
1503                     File cacheFile = null;
1504                     try {
1505                         cacheFile = getMessageCacheFile(envelope.getSourceE164().get(), now, envelope.getTimestamp());
1506                         Files.delete(cacheFile.toPath());
1507                         // Try to delete directory if empty
1508                         new File(getMessageCachePath()).delete();
1509                     } catch (IOException e) {
1510                         System.err.println("Failed to delete cached message file “" + cacheFile + "”: " + e.getMessage());
1511                     }
1512                 }
1513             }
1514         } finally {
1515             if (messagePipe != null) {
1516                 messagePipe.shutdown();
1517                 messagePipe = null;
1518             }
1519         }
1520     }
1521
1522     private boolean isMessageBlocked(SignalServiceEnvelope envelope, SignalServiceContent content) {
1523         SignalServiceAddress source;
1524         if (!envelope.isUnidentifiedSender() && envelope.hasSource()) {
1525             source = envelope.getSourceAddress();
1526         } else if (content != null) {
1527             source = content.getSender();
1528         } else {
1529             return false;
1530         }
1531         ContactInfo sourceContact = account.getContactStore().getContact(source);
1532         if (sourceContact != null && sourceContact.blocked) {
1533             return true;
1534         }
1535
1536         if (content != null && content.getDataMessage().isPresent()) {
1537             SignalServiceDataMessage message = content.getDataMessage().get();
1538             if (message.getGroupContext().isPresent() && message.getGroupContext().get().getGroupV1().isPresent()) {
1539                 SignalServiceGroup groupInfo = message.getGroupContext().get().getGroupV1().get();
1540                 GroupInfo group = getGroup(groupInfo.getGroupId());
1541                 if (groupInfo.getType() == SignalServiceGroup.Type.DELIVER && group != null && group.blocked) {
1542                     return true;
1543                 }
1544             }
1545         }
1546         return false;
1547     }
1548
1549     private void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent content, boolean ignoreAttachments) {
1550         if (content != null) {
1551             SignalServiceAddress sender;
1552             if (!envelope.isUnidentifiedSender() && envelope.hasSource()) {
1553                 sender = envelope.getSourceAddress();
1554             } else {
1555                 sender = content.getSender();
1556             }
1557             if (content.getDataMessage().isPresent()) {
1558                 SignalServiceDataMessage message = content.getDataMessage().get();
1559
1560                 if (content.isNeedsReceipt()) {
1561                     try {
1562                         sendReceipt(sender, message.getTimestamp());
1563                     } catch (IOException | UntrustedIdentityException | IllegalArgumentException e) {
1564                         e.printStackTrace();
1565                     }
1566                 }
1567
1568                 handleSignalServiceDataMessage(message, false, sender, account.getSelfAddress(), ignoreAttachments);
1569             }
1570             if (content.getSyncMessage().isPresent()) {
1571                 account.setMultiDevice(true);
1572                 SignalServiceSyncMessage syncMessage = content.getSyncMessage().get();
1573                 if (syncMessage.getSent().isPresent()) {
1574                     SentTranscriptMessage message = syncMessage.getSent().get();
1575                     handleSignalServiceDataMessage(message.getMessage(), true, sender, message.getDestination().orNull(), ignoreAttachments);
1576                 }
1577                 if (syncMessage.getRequest().isPresent()) {
1578                     RequestMessage rm = syncMessage.getRequest().get();
1579                     if (rm.isContactsRequest()) {
1580                         try {
1581                             sendContacts();
1582                         } catch (UntrustedIdentityException | IOException | IllegalArgumentException e) {
1583                             e.printStackTrace();
1584                         }
1585                     }
1586                     if (rm.isGroupsRequest()) {
1587                         try {
1588                             sendGroups();
1589                         } catch (UntrustedIdentityException | IOException | IllegalArgumentException e) {
1590                             e.printStackTrace();
1591                         }
1592                     }
1593                     if (rm.isBlockedListRequest()) {
1594                         try {
1595                             sendBlockedList();
1596                         } catch (UntrustedIdentityException | IOException | IllegalArgumentException e) {
1597                             e.printStackTrace();
1598                         }
1599                     }
1600                     // TODO Handle rm.isConfigurationRequest();
1601                 }
1602                 if (syncMessage.getGroups().isPresent()) {
1603                     File tmpFile = null;
1604                     try {
1605                         tmpFile = IOUtils.createTempFile();
1606                         try (InputStream attachmentAsStream = retrieveAttachmentAsStream(syncMessage.getGroups().get().asPointer(), tmpFile)) {
1607                             DeviceGroupsInputStream s = new DeviceGroupsInputStream(attachmentAsStream);
1608                             DeviceGroup g;
1609                             while ((g = s.read()) != null) {
1610                                 GroupInfo syncGroup = account.getGroupStore().getGroup(g.getId());
1611                                 if (syncGroup == null) {
1612                                     syncGroup = new GroupInfo(g.getId());
1613                                 }
1614                                 if (g.getName().isPresent()) {
1615                                     syncGroup.name = g.getName().get();
1616                                 }
1617                                 syncGroup.addMembers(g.getMembers()
1618                                         .stream()
1619                                         .map(this::resolveSignalServiceAddress)
1620                                         .collect(Collectors.toSet()));
1621                                 if (!g.isActive()) {
1622                                     syncGroup.removeMember(account.getSelfAddress());
1623                                 } else {
1624                                     // Add ourself to the member set as it's marked as active
1625                                     syncGroup.addMembers(Collections.singleton(account.getSelfAddress()));
1626                                 }
1627                                 syncGroup.blocked = g.isBlocked();
1628                                 if (g.getColor().isPresent()) {
1629                                     syncGroup.color = g.getColor().get();
1630                                 }
1631
1632                                 if (g.getAvatar().isPresent()) {
1633                                     retrieveGroupAvatarAttachment(g.getAvatar().get(), syncGroup.groupId);
1634                                 }
1635                                 syncGroup.inboxPosition = g.getInboxPosition().orNull();
1636                                 syncGroup.archived = g.isArchived();
1637                                 account.getGroupStore().updateGroup(syncGroup);
1638                             }
1639                         }
1640                     } catch (Exception e) {
1641                         e.printStackTrace();
1642                     } finally {
1643                         if (tmpFile != null) {
1644                             try {
1645                                 Files.delete(tmpFile.toPath());
1646                             } catch (IOException e) {
1647                                 System.err.println("Failed to delete received groups temp file “" + tmpFile + "”: " + e.getMessage());
1648                             }
1649                         }
1650                     }
1651                 }
1652                 if (syncMessage.getBlockedList().isPresent()) {
1653                     final BlockedListMessage blockedListMessage = syncMessage.getBlockedList().get();
1654                     for (SignalServiceAddress address : blockedListMessage.getAddresses()) {
1655                         setContactBlocked(resolveSignalServiceAddress(address), true);
1656                     }
1657                     for (byte[] groupId : blockedListMessage.getGroupIds()) {
1658                         try {
1659                             setGroupBlocked(groupId, true);
1660                         } catch (GroupNotFoundException e) {
1661                             System.err.println("BlockedListMessage contained groupID that was not found in GroupStore: " + Base64.encodeBytes(groupId));
1662                         }
1663                     }
1664                 }
1665                 if (syncMessage.getContacts().isPresent()) {
1666                     File tmpFile = null;
1667                     try {
1668                         tmpFile = IOUtils.createTempFile();
1669                         final ContactsMessage contactsMessage = syncMessage.getContacts().get();
1670                         try (InputStream attachmentAsStream = retrieveAttachmentAsStream(contactsMessage.getContactsStream().asPointer(), tmpFile)) {
1671                             DeviceContactsInputStream s = new DeviceContactsInputStream(attachmentAsStream);
1672                             if (contactsMessage.isComplete()) {
1673                                 account.getContactStore().clear();
1674                             }
1675                             DeviceContact c;
1676                             while ((c = s.read()) != null) {
1677                                 if (c.getAddress().matches(account.getSelfAddress()) && c.getProfileKey().isPresent()) {
1678                                     account.setProfileKey(c.getProfileKey().get());
1679                                 }
1680                                 final SignalServiceAddress address = resolveSignalServiceAddress(c.getAddress());
1681                                 ContactInfo contact = account.getContactStore().getContact(address);
1682                                 if (contact == null) {
1683                                     contact = new ContactInfo(address);
1684                                 }
1685                                 if (c.getName().isPresent()) {
1686                                     contact.name = c.getName().get();
1687                                 }
1688                                 if (c.getColor().isPresent()) {
1689                                     contact.color = c.getColor().get();
1690                                 }
1691                                 if (c.getProfileKey().isPresent()) {
1692                                     contact.profileKey = Base64.encodeBytes(c.getProfileKey().get().serialize());
1693                                 }
1694                                 if (c.getVerified().isPresent()) {
1695                                     final VerifiedMessage verifiedMessage = c.getVerified().get();
1696                                     account.getSignalProtocolStore().setIdentityTrustLevel(verifiedMessage.getDestination(), verifiedMessage.getIdentityKey(), TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
1697                                 }
1698                                 if (c.getExpirationTimer().isPresent()) {
1699                                     contact.messageExpirationTime = c.getExpirationTimer().get();
1700                                 }
1701                                 contact.blocked = c.isBlocked();
1702                                 contact.inboxPosition = c.getInboxPosition().orNull();
1703                                 contact.archived = c.isArchived();
1704                                 account.getContactStore().updateContact(contact);
1705
1706                                 if (c.getAvatar().isPresent()) {
1707                                     retrieveContactAvatarAttachment(c.getAvatar().get(), contact.number);
1708                                 }
1709                             }
1710                         }
1711                     } catch (Exception e) {
1712                         e.printStackTrace();
1713                     } finally {
1714                         if (tmpFile != null) {
1715                             try {
1716                                 Files.delete(tmpFile.toPath());
1717                             } catch (IOException e) {
1718                                 System.err.println("Failed to delete received contacts temp file “" + tmpFile + "”: " + e.getMessage());
1719                             }
1720                         }
1721                     }
1722                 }
1723                 if (syncMessage.getVerified().isPresent()) {
1724                     final VerifiedMessage verifiedMessage = syncMessage.getVerified().get();
1725                     account.getSignalProtocolStore().setIdentityTrustLevel(resolveSignalServiceAddress(verifiedMessage.getDestination()), verifiedMessage.getIdentityKey(), TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
1726                 }
1727                 if (syncMessage.getConfiguration().isPresent()) {
1728                     // TODO
1729                 }
1730             }
1731         }
1732     }
1733
1734     private File getContactAvatarFile(String number) {
1735         return new File(avatarsPath, "contact-" + number);
1736     }
1737
1738     private File retrieveContactAvatarAttachment(SignalServiceAttachment attachment, String number) throws IOException, InvalidMessageException {
1739         IOUtils.createPrivateDirectories(avatarsPath);
1740         if (attachment.isPointer()) {
1741             SignalServiceAttachmentPointer pointer = attachment.asPointer();
1742             return retrieveAttachment(pointer, getContactAvatarFile(number), false);
1743         } else {
1744             SignalServiceAttachmentStream stream = attachment.asStream();
1745             return Utils.retrieveAttachment(stream, getContactAvatarFile(number));
1746         }
1747     }
1748
1749     private File getGroupAvatarFile(byte[] groupId) {
1750         return new File(avatarsPath, "group-" + Base64.encodeBytes(groupId).replace("/", "_"));
1751     }
1752
1753     private File retrieveGroupAvatarAttachment(SignalServiceAttachment attachment, byte[] groupId) throws IOException, InvalidMessageException {
1754         IOUtils.createPrivateDirectories(avatarsPath);
1755         if (attachment.isPointer()) {
1756             SignalServiceAttachmentPointer pointer = attachment.asPointer();
1757             return retrieveAttachment(pointer, getGroupAvatarFile(groupId), false);
1758         } else {
1759             SignalServiceAttachmentStream stream = attachment.asStream();
1760             return Utils.retrieveAttachment(stream, getGroupAvatarFile(groupId));
1761         }
1762     }
1763
1764     public File getAttachmentFile(long attachmentId) {
1765         return new File(attachmentsPath, attachmentId + "");
1766     }
1767
1768     private File retrieveAttachment(SignalServiceAttachmentPointer pointer) throws IOException, InvalidMessageException {
1769         IOUtils.createPrivateDirectories(attachmentsPath);
1770         return retrieveAttachment(pointer, getAttachmentFile(pointer.getId()), true);
1771     }
1772
1773     private File retrieveAttachment(SignalServiceAttachmentPointer pointer, File outputFile, boolean storePreview) throws IOException, InvalidMessageException {
1774         if (storePreview && pointer.getPreview().isPresent()) {
1775             File previewFile = new File(outputFile + ".preview");
1776             try (OutputStream output = new FileOutputStream(previewFile)) {
1777                 byte[] preview = pointer.getPreview().get();
1778                 output.write(preview, 0, preview.length);
1779             } catch (FileNotFoundException e) {
1780                 e.printStackTrace();
1781                 return null;
1782             }
1783         }
1784
1785         final SignalServiceMessageReceiver messageReceiver = getMessageReceiver();
1786
1787         File tmpFile = IOUtils.createTempFile();
1788         try (InputStream input = messageReceiver.retrieveAttachment(pointer, tmpFile, BaseConfig.MAX_ATTACHMENT_SIZE)) {
1789             try (OutputStream output = new FileOutputStream(outputFile)) {
1790                 byte[] buffer = new byte[4096];
1791                 int read;
1792
1793                 while ((read = input.read(buffer)) != -1) {
1794                     output.write(buffer, 0, read);
1795                 }
1796             } catch (FileNotFoundException e) {
1797                 e.printStackTrace();
1798                 return null;
1799             }
1800         } finally {
1801             try {
1802                 Files.delete(tmpFile.toPath());
1803             } catch (IOException e) {
1804                 System.err.println("Failed to delete received attachment temp file “" + tmpFile + "”: " + e.getMessage());
1805             }
1806         }
1807         return outputFile;
1808     }
1809
1810     private InputStream retrieveAttachmentAsStream(SignalServiceAttachmentPointer pointer, File tmpFile) throws IOException, InvalidMessageException {
1811         final SignalServiceMessageReceiver messageReceiver = getMessageReceiver();
1812         return messageReceiver.retrieveAttachment(pointer, tmpFile, BaseConfig.MAX_ATTACHMENT_SIZE);
1813     }
1814
1815     @Override
1816     public boolean isRemote() {
1817         return false;
1818     }
1819
1820     private void sendGroups() throws IOException, UntrustedIdentityException {
1821         File groupsFile = IOUtils.createTempFile();
1822
1823         try {
1824             try (OutputStream fos = new FileOutputStream(groupsFile)) {
1825                 DeviceGroupsOutputStream out = new DeviceGroupsOutputStream(fos);
1826                 for (GroupInfo record : account.getGroupStore().getGroups()) {
1827                     out.write(new DeviceGroup(record.groupId, Optional.fromNullable(record.name),
1828                             new ArrayList<>(record.getMembers()), createGroupAvatarAttachment(record.groupId),
1829                             record.isMember(account.getSelfAddress()), Optional.of(record.messageExpirationTime),
1830                             Optional.fromNullable(record.color), record.blocked, Optional.fromNullable(record.inboxPosition), record.archived));
1831                 }
1832             }
1833
1834             if (groupsFile.exists() && groupsFile.length() > 0) {
1835                 try (FileInputStream groupsFileStream = new FileInputStream(groupsFile)) {
1836                     SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
1837                             .withStream(groupsFileStream)
1838                             .withContentType("application/octet-stream")
1839                             .withLength(groupsFile.length())
1840                             .build();
1841
1842                     sendSyncMessage(SignalServiceSyncMessage.forGroups(attachmentStream));
1843                 }
1844             }
1845         } finally {
1846             try {
1847                 Files.delete(groupsFile.toPath());
1848             } catch (IOException e) {
1849                 System.err.println("Failed to delete groups temp file “" + groupsFile + "”: " + e.getMessage());
1850             }
1851         }
1852     }
1853
1854     public void sendContacts() throws IOException, UntrustedIdentityException {
1855         File contactsFile = IOUtils.createTempFile();
1856
1857         try {
1858             try (OutputStream fos = new FileOutputStream(contactsFile)) {
1859                 DeviceContactsOutputStream out = new DeviceContactsOutputStream(fos);
1860                 for (ContactInfo record : account.getContactStore().getContacts()) {
1861                     VerifiedMessage verifiedMessage = null;
1862                     JsonIdentityKeyStore.Identity currentIdentity = account.getSignalProtocolStore().getIdentity(record.getAddress());
1863                     if (currentIdentity != null) {
1864                         verifiedMessage = new VerifiedMessage(record.getAddress(), currentIdentity.getIdentityKey(), currentIdentity.getTrustLevel().toVerifiedState(), currentIdentity.getDateAdded().getTime());
1865                     }
1866
1867                     ProfileKey profileKey = null;
1868                     try {
1869                         profileKey = record.profileKey == null ? null : new ProfileKey(Base64.decode(record.profileKey));
1870                     } catch (InvalidInputException ignored) {
1871                     }
1872                     out.write(new DeviceContact(record.getAddress(), Optional.fromNullable(record.name),
1873                             createContactAvatarAttachment(record.number), Optional.fromNullable(record.color),
1874                             Optional.fromNullable(verifiedMessage), Optional.fromNullable(profileKey), record.blocked,
1875                             Optional.of(record.messageExpirationTime),
1876                             Optional.fromNullable(record.inboxPosition), record.archived));
1877                 }
1878
1879                 if (account.getProfileKey() != null) {
1880                     // Send our own profile key as well
1881                     out.write(new DeviceContact(account.getSelfAddress(),
1882                             Optional.absent(), Optional.absent(),
1883                             Optional.absent(), Optional.absent(),
1884                             Optional.of(account.getProfileKey()),
1885                             false, Optional.absent(), Optional.absent(), false));
1886                 }
1887             }
1888
1889             if (contactsFile.exists() && contactsFile.length() > 0) {
1890                 try (FileInputStream contactsFileStream = new FileInputStream(contactsFile)) {
1891                     SignalServiceAttachmentStream attachmentStream = SignalServiceAttachment.newStreamBuilder()
1892                             .withStream(contactsFileStream)
1893                             .withContentType("application/octet-stream")
1894                             .withLength(contactsFile.length())
1895                             .build();
1896
1897                     sendSyncMessage(SignalServiceSyncMessage.forContacts(new ContactsMessage(attachmentStream, true)));
1898                 }
1899             }
1900         } finally {
1901             try {
1902                 Files.delete(contactsFile.toPath());
1903             } catch (IOException e) {
1904                 System.err.println("Failed to delete contacts temp file “" + contactsFile + "”: " + e.getMessage());
1905             }
1906         }
1907     }
1908
1909     private void sendBlockedList() throws IOException, UntrustedIdentityException {
1910         List<SignalServiceAddress> addresses = new ArrayList<>();
1911         for (ContactInfo record : account.getContactStore().getContacts()) {
1912             if (record.blocked) {
1913                 addresses.add(record.getAddress());
1914             }
1915         }
1916         List<byte[]> groupIds = new ArrayList<>();
1917         for (GroupInfo record : account.getGroupStore().getGroups()) {
1918             if (record.blocked) {
1919                 groupIds.add(record.groupId);
1920             }
1921         }
1922         sendSyncMessage(SignalServiceSyncMessage.forBlocked(new BlockedListMessage(addresses, groupIds)));
1923     }
1924
1925     private void sendVerifiedMessage(SignalServiceAddress destination, IdentityKey identityKey, TrustLevel trustLevel) throws IOException, UntrustedIdentityException {
1926         VerifiedMessage verifiedMessage = new VerifiedMessage(destination, identityKey, trustLevel.toVerifiedState(), System.currentTimeMillis());
1927         sendSyncMessage(SignalServiceSyncMessage.forVerified(verifiedMessage));
1928     }
1929
1930     public List<ContactInfo> getContacts() {
1931         return account.getContactStore().getContacts();
1932     }
1933
1934     public ContactInfo getContact(String number) {
1935         return account.getContactStore().getContact(Util.getSignalServiceAddressFromIdentifier(number));
1936     }
1937
1938     public GroupInfo getGroup(byte[] groupId) {
1939         return account.getGroupStore().getGroup(groupId);
1940     }
1941
1942     public List<JsonIdentityKeyStore.Identity> getIdentities() {
1943         return account.getSignalProtocolStore().getIdentities();
1944     }
1945
1946     public List<JsonIdentityKeyStore.Identity> getIdentities(String number) throws InvalidNumberException {
1947         return account.getSignalProtocolStore().getIdentities(canonicalizeAndResolveSignalServiceAddress(number));
1948     }
1949
1950     /**
1951      * Trust this the identity with this fingerprint
1952      *
1953      * @param name        username of the identity
1954      * @param fingerprint Fingerprint
1955      */
1956     public boolean trustIdentityVerified(String name, byte[] fingerprint) throws InvalidNumberException {
1957         SignalServiceAddress address = canonicalizeAndResolveSignalServiceAddress(name);
1958         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(address);
1959         if (ids == null) {
1960             return false;
1961         }
1962         for (JsonIdentityKeyStore.Identity id : ids) {
1963             if (!Arrays.equals(id.getIdentityKey().serialize(), fingerprint)) {
1964                 continue;
1965             }
1966
1967             account.getSignalProtocolStore().setIdentityTrustLevel(address, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1968             try {
1969                 sendVerifiedMessage(address, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1970             } catch (IOException | UntrustedIdentityException e) {
1971                 e.printStackTrace();
1972             }
1973             account.save();
1974             return true;
1975         }
1976         return false;
1977     }
1978
1979     /**
1980      * Trust this the identity with this safety number
1981      *
1982      * @param name         username of the identity
1983      * @param safetyNumber Safety number
1984      */
1985     public boolean trustIdentityVerifiedSafetyNumber(String name, String safetyNumber) throws InvalidNumberException {
1986         SignalServiceAddress address = canonicalizeAndResolveSignalServiceAddress(name);
1987         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(address);
1988         if (ids == null) {
1989             return false;
1990         }
1991         for (JsonIdentityKeyStore.Identity id : ids) {
1992             if (!safetyNumber.equals(computeSafetyNumber(address, id.getIdentityKey()))) {
1993                 continue;
1994             }
1995
1996             account.getSignalProtocolStore().setIdentityTrustLevel(address, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1997             try {
1998                 sendVerifiedMessage(address, id.getIdentityKey(), TrustLevel.TRUSTED_VERIFIED);
1999             } catch (IOException | UntrustedIdentityException e) {
2000                 e.printStackTrace();
2001             }
2002             account.save();
2003             return true;
2004         }
2005         return false;
2006     }
2007
2008     /**
2009      * Trust all keys of this identity without verification
2010      *
2011      * @param name username of the identity
2012      */
2013     public boolean trustIdentityAllKeys(String name) {
2014         SignalServiceAddress address = resolveSignalServiceAddress(name);
2015         List<JsonIdentityKeyStore.Identity> ids = account.getSignalProtocolStore().getIdentities(address);
2016         if (ids == null) {
2017             return false;
2018         }
2019         for (JsonIdentityKeyStore.Identity id : ids) {
2020             if (id.getTrustLevel() == TrustLevel.UNTRUSTED) {
2021                 account.getSignalProtocolStore().setIdentityTrustLevel(address, id.getIdentityKey(), TrustLevel.TRUSTED_UNVERIFIED);
2022                 try {
2023                     sendVerifiedMessage(address, id.getIdentityKey(), TrustLevel.TRUSTED_UNVERIFIED);
2024                 } catch (IOException | UntrustedIdentityException e) {
2025                     e.printStackTrace();
2026                 }
2027             }
2028         }
2029         account.save();
2030         return true;
2031     }
2032
2033     public String computeSafetyNumber(SignalServiceAddress theirAddress, IdentityKey theirIdentityKey) {
2034         return Utils.computeSafetyNumber(account.getSelfAddress(), getIdentity(), theirAddress, theirIdentityKey);
2035     }
2036
2037     public SignalServiceAddress canonicalizeAndResolveSignalServiceAddress(String identifier) throws InvalidNumberException {
2038         String canonicalizedNumber = UuidUtil.isUuid(identifier) ? identifier : Util.canonicalizeNumber(identifier, account.getUsername());
2039         return resolveSignalServiceAddress(canonicalizedNumber);
2040     }
2041
2042     public SignalServiceAddress resolveSignalServiceAddress(String identifier) {
2043         SignalServiceAddress address = Util.getSignalServiceAddressFromIdentifier(identifier);
2044
2045         return resolveSignalServiceAddress(address);
2046     }
2047
2048     public SignalServiceAddress resolveSignalServiceAddress(SignalServiceAddress address) {
2049         if (address.matches(account.getSelfAddress())) {
2050             return account.getSelfAddress();
2051         }
2052
2053         return account.getRecipientStore().resolveServiceAddress(address);
2054     }
2055
2056     public interface ReceiveMessageHandler {
2057
2058         void handleMessage(SignalServiceEnvelope envelope, SignalServiceContent decryptedContent, Throwable e);
2059     }
2060 }