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

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