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

   1 package org.asamk.signal.manager.helper;
   2
   3 import org.asamk.signal.manager.Manager;
   4 import org.asamk.signal.manager.SignalDependencies;
   5 import org.asamk.signal.manager.actions.HandleAction;
   6 import org.asamk.signal.manager.actions.RefreshPreKeysAction;
   7 import org.asamk.signal.manager.actions.RenewSessionAction;
   8 import org.asamk.signal.manager.actions.ResendMessageAction;
   9 import org.asamk.signal.manager.actions.RetrieveProfileAction;
  10 import org.asamk.signal.manager.actions.RetrieveStorageDataAction;
  11 import org.asamk.signal.manager.actions.SendGroupInfoAction;
  12 import org.asamk.signal.manager.actions.SendGroupInfoRequestAction;
  13 import org.asamk.signal.manager.actions.SendPniIdentityKeyAction;
  14 import org.asamk.signal.manager.actions.SendProfileKeyAction;
  15 import org.asamk.signal.manager.actions.SendReceiptAction;
  16 import org.asamk.signal.manager.actions.SendRetryMessageRequestAction;
  17 import org.asamk.signal.manager.actions.SendSyncBlockedListAction;
  18 import org.asamk.signal.manager.actions.SendSyncConfigurationAction;
  19 import org.asamk.signal.manager.actions.SendSyncContactsAction;
  20 import org.asamk.signal.manager.actions.SendSyncGroupsAction;
  21 import org.asamk.signal.manager.actions.SendSyncKeysAction;
  22 import org.asamk.signal.manager.actions.UpdateAccountAttributesAction;
  23 import org.asamk.signal.manager.api.MessageEnvelope;
  24 import org.asamk.signal.manager.api.Pair;
  25 import org.asamk.signal.manager.api.ReceiveConfig;
  26 import org.asamk.signal.manager.api.StickerPackId;
  27 import org.asamk.signal.manager.api.TrustLevel;
  28 import org.asamk.signal.manager.api.UntrustedIdentityException;
  29 import org.asamk.signal.manager.groups.GroupId;
  30 import org.asamk.signal.manager.groups.GroupNotFoundException;
  31 import org.asamk.signal.manager.groups.GroupUtils;
  32 import org.asamk.signal.manager.jobs.RetrieveStickerPackJob;
  33 import org.asamk.signal.manager.storage.SignalAccount;
  34 import org.asamk.signal.manager.storage.groups.GroupInfoV1;
  35 import org.asamk.signal.manager.storage.recipients.Profile;
  36 import org.asamk.signal.manager.storage.recipients.RecipientId;
  37 import org.asamk.signal.manager.storage.stickers.Sticker;
  38 import org.asamk.signal.manager.util.KeyUtils;
  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.ProtocolNoSessionException;
  43 import org.signal.libsignal.metadata.ProtocolUntrustedIdentityException;
  44 import org.signal.libsignal.metadata.SelfSendException;
  45 import org.signal.libsignal.protocol.SignalProtocolAddress;
  46 import org.signal.libsignal.protocol.message.DecryptionErrorMessage;
  47 import org.signal.libsignal.zkgroup.InvalidInputException;
  48 import org.signal.libsignal.zkgroup.profiles.ProfileKey;
  49 import org.slf4j.Logger;
  50 import org.slf4j.LoggerFactory;
  51 import org.whispersystems.signalservice.api.messages.SignalServiceContent;
  52 import org.whispersystems.signalservice.api.messages.SignalServiceDataMessage;
  53 import org.whispersystems.signalservice.api.messages.SignalServiceEnvelope;
  54 import org.whispersystems.signalservice.api.messages.SignalServiceGroup;
  55 import org.whispersystems.signalservice.api.messages.SignalServiceGroupV2;
  56 import org.whispersystems.signalservice.api.messages.SignalServiceReceiptMessage;
  57 import org.whispersystems.signalservice.api.messages.SignalServiceStoryMessage;
  58 import org.whispersystems.signalservice.api.messages.multidevice.SignalServiceSyncMessage;
  59 import org.whispersystems.signalservice.api.messages.multidevice.StickerPackOperationMessage;
  60 import org.whispersystems.signalservice.api.push.SignalServiceAddress;
  61
  62 import java.util.ArrayList;
  63 import java.util.List;
  64 import java.util.stream.Collectors;
  65
  66 public final class IncomingMessageHandler {
  67
  68     private final static Logger logger = LoggerFactory.getLogger(IncomingMessageHandler.class);
  69
  70     private final SignalAccount account;
  71     private final SignalDependencies dependencies;
  72     private final Context context;
  73
  74     public IncomingMessageHandler(final Context context) {
  75         this.account = context.getAccount();
  76         this.dependencies = context.getDependencies();
  77         this.context = context;
  78     }
  79
  80     public Pair<List<HandleAction>, Exception> handleRetryEnvelope(
  81             final SignalServiceEnvelope envelope,
  82             final ReceiveConfig receiveConfig,
  83             final Manager.ReceiveMessageHandler handler
  84     ) {
  85         final List<HandleAction> actions = new ArrayList<>();
  86         if (envelope.isPreKeySignalMessage()) {
  87             actions.add(RefreshPreKeysAction.create());
  88         }
  89
  90         SignalServiceContent content = null;
  91         if (!envelope.isReceipt()) {
  92             account.getIdentityKeyStore().setRetryingDecryption(true);
  93             try {
  94                 content = dependencies.getCipher().decrypt(envelope);
  95             } catch (ProtocolUntrustedIdentityException e) {
  96                 final var recipientId = account.getRecipientResolver().resolveRecipient(e.getSender());
  97                 final var exception = new UntrustedIdentityException(account.getRecipientAddressResolver()
  98                         .resolveRecipientAddress(recipientId), e.getSenderDevice());
  99                 return new Pair<>(List.of(), exception);
 100             } catch (Exception e) {
 101                 return new Pair<>(List.of(), e);
 102             } finally {
 103                 account.getIdentityKeyStore().setRetryingDecryption(false);
 104             }
 105         }
 106         actions.addAll(checkAndHandleMessage(envelope, content, receiveConfig, handler, null));
 107         return new Pair<>(actions, null);
 108     }
 109
 110     public Pair<List<HandleAction>, Exception> handleEnvelope(
 111             final SignalServiceEnvelope envelope,
 112             final ReceiveConfig receiveConfig,
 113             final Manager.ReceiveMessageHandler handler
 114     ) {
 115         final var actions = new ArrayList<HandleAction>();
 116         if (envelope.hasSourceUuid()) {
 117             // Store uuid if we don't have it already
 118             // address/uuid in envelope is sent by server
 119             account.getRecipientTrustedResolver().resolveRecipientTrusted(envelope.getSourceAddress());
 120         }
 121         SignalServiceContent content = null;
 122         Exception exception = null;
 123         if (!envelope.isReceipt()) {
 124             try {
 125                 content = dependencies.getCipher().decrypt(envelope);
 126             } catch (ProtocolUntrustedIdentityException e) {
 127                 final var recipientId = account.getRecipientResolver().resolveRecipient(e.getSender());
 128                 actions.add(new RetrieveProfileAction(recipientId));
 129                 exception = new UntrustedIdentityException(account.getRecipientAddressResolver()
 130                         .resolveRecipientAddress(recipientId), e.getSenderDevice());
 131             } catch (ProtocolInvalidKeyIdException | ProtocolInvalidKeyException | ProtocolNoSessionException |
 132                      ProtocolInvalidMessageException e) {
 133                 logger.debug("Failed to decrypt incoming message", e);
 134                 final var sender = account.getRecipientResolver().resolveRecipient(e.getSender());
 135                 if (context.getContactHelper().isContactBlocked(sender)) {
 136                     logger.debug("Received invalid message from blocked contact, ignoring.");
 137                 } else {
 138                     final var senderProfile = context.getProfileHelper().getRecipientProfile(sender);
 139                     final var selfProfile = context.getProfileHelper().getSelfProfile();
 140                     if ((!sender.equals(account.getSelfRecipientId()) || e.getSenderDevice() != account.getDeviceId())
 141                             && senderProfile != null
 142                             && senderProfile.getCapabilities().contains(Profile.Capability.senderKey)
 143                             && selfProfile != null
 144                             && selfProfile.getCapabilities().contains(Profile.Capability.senderKey)) {
 145                         logger.debug("Received invalid message, requesting message resend.");
 146                         actions.add(new SendRetryMessageRequestAction(sender, e, envelope));
 147                     } else {
 148                         logger.debug("Received invalid message, queuing renew session action.");
 149                         actions.add(new RenewSessionAction(sender));
 150                     }
 151                 }
 152                 exception = e;
 153             } catch (SelfSendException e) {
 154                 logger.debug("Dropping unidentified message from self.");
 155                 return new Pair<>(List.of(), null);
 156             } catch (Exception e) {
 157                 logger.debug("Failed to handle incoming message", e);
 158                 exception = e;
 159             }
 160         }
 161
 162         actions.addAll(checkAndHandleMessage(envelope, content, receiveConfig, handler, exception));
 163         return new Pair<>(actions, exception);
 164     }
 165
 166     private List<HandleAction> checkAndHandleMessage(
 167             final SignalServiceEnvelope envelope,
 168             final SignalServiceContent content,
 169             final ReceiveConfig receiveConfig,
 170             final Manager.ReceiveMessageHandler handler,
 171             final Exception exception
 172     ) {
 173         if (!envelope.hasSourceUuid() && content != null) {
 174             // Store uuid if we don't have it already
 175             // address/uuid is validated by unidentified sender certificate
 176             account.getRecipientTrustedResolver().resolveRecipientTrusted(content.getSender());
 177         }
 178         if (envelope.isReceipt()) {
 179             final var senderPair = getSender(envelope, content);
 180             final var sender = senderPair.first();
 181             final var senderDeviceId = senderPair.second();
 182             account.getMessageSendLogStore().deleteEntryForRecipient(envelope.getTimestamp(), sender, senderDeviceId);
 183         }
 184
 185         if (isMessageBlocked(envelope, content)) {
 186             logger.info("Ignoring a message from blocked user/group: {}", envelope.getTimestamp());
 187             return List.of();
 188         } else if (isNotAllowedToSendToGroup(envelope, content)) {
 189             logger.info("Ignoring a group message from an unauthorized sender (no member or admin): {} {}",
 190                     (envelope.hasSourceUuid() ? envelope.getSourceAddress() : content.getSender()).getIdentifier(),
 191                     envelope.getTimestamp());
 192             return List.of();
 193         } else {
 194             List<HandleAction> actions;
 195             if (content != null) {
 196                 actions = handleMessage(envelope, content, receiveConfig);
 197             } else {
 198                 actions = List.of();
 199             }
 200             handler.handleMessage(MessageEnvelope.from(envelope,
 201                     content,
 202                     account.getRecipientResolver(),
 203                     account.getRecipientAddressResolver(),
 204                     context.getAttachmentHelper()::getAttachmentFile,
 205                     exception), exception);
 206             return actions;
 207         }
 208     }
 209
 210     public List<HandleAction> handleMessage(
 211             SignalServiceEnvelope envelope, SignalServiceContent content, ReceiveConfig receiveConfig
 212     ) {
 213         var actions = new ArrayList<HandleAction>();
 214         final var senderPair = getSender(envelope, content);
 215         final var sender = senderPair.first();
 216         final var senderDeviceId = senderPair.second();
 217
 218         if (content.getReceiptMessage().isPresent()) {
 219             final var message = content.getReceiptMessage().get();
 220             if (message.isDeliveryReceipt()) {
 221                 account.getMessageSendLogStore()
 222                         .deleteEntriesForRecipient(message.getTimestamps(), sender, senderDeviceId);
 223             }
 224         }
 225
 226         if (content.getSenderKeyDistributionMessage().isPresent()) {
 227             final var message = content.getSenderKeyDistributionMessage().get();
 228             final var protocolAddress = new SignalProtocolAddress(context.getRecipientHelper()
 229                     .resolveSignalServiceAddress(sender)
 230                     .getIdentifier(), senderDeviceId);
 231             logger.debug("Received a sender key distribution message for distributionId {} from {}",
 232                     message.getDistributionId(),
 233                     protocolAddress);
 234             dependencies.getMessageSender().processSenderKeyDistributionMessage(protocolAddress, message);
 235         }
 236
 237         if (content.getDecryptionErrorMessage().isPresent()) {
 238             var message = content.getDecryptionErrorMessage().get();
 239             logger.debug("Received a decryption error message from {}.{} (resend request for {})",
 240                     sender,
 241                     senderDeviceId,
 242                     message.getTimestamp());
 243             if (message.getDeviceId() == account.getDeviceId()) {
 244                 handleDecryptionErrorMessage(actions, sender, senderDeviceId, message);
 245             } else {
 246                 logger.debug("Request is for another one of our devices");
 247             }
 248         }
 249
 250         if (content.getDataMessage().isPresent()) {
 251             var message = content.getDataMessage().get();
 252
 253             if (content.isNeedsReceipt()) {
 254                 actions.add(new SendReceiptAction(sender,
 255                         SignalServiceReceiptMessage.Type.DELIVERY,
 256                         message.getTimestamp()));
 257             } else {
 258                 // Message wasn't sent as unidentified sender message
 259                 final var contact = context.getAccount().getContactStore().getContact(sender);
 260                 if (account.isPrimaryDevice()
 261                         && contact != null
 262                         && !contact.isBlocked()
 263                         && contact.isProfileSharingEnabled()) {
 264                     actions.add(UpdateAccountAttributesAction.create());
 265                     actions.add(new SendProfileKeyAction(sender));
 266                 }
 267             }
 268             if (receiveConfig.sendReadReceipts()) {
 269                 actions.add(new SendReceiptAction(sender,
 270                         SignalServiceReceiptMessage.Type.READ,
 271                         message.getTimestamp()));
 272             }
 273
 274             actions.addAll(handleSignalServiceDataMessage(message,
 275                     false,
 276                     sender,
 277                     account.getSelfRecipientId(),
 278                     receiveConfig.ignoreAttachments()));
 279         }
 280
 281         if (content.getStoryMessage().isPresent()) {
 282             final var message = content.getStoryMessage().get();
 283             actions.addAll(handleSignalServiceStoryMessage(message, sender, receiveConfig.ignoreAttachments()));
 284         }
 285
 286         if (content.getSyncMessage().isPresent()) {
 287             var syncMessage = content.getSyncMessage().get();
 288             actions.addAll(handleSyncMessage(syncMessage, sender, receiveConfig.ignoreAttachments()));
 289         }
 290
 291         return actions;
 292     }
 293
 294     private void handleDecryptionErrorMessage(
 295             final List<HandleAction> actions,
 296             final RecipientId sender,
 297             final int senderDeviceId,
 298             final DecryptionErrorMessage message
 299     ) {
 300         final var logEntries = account.getMessageSendLogStore()
 301                 .findMessages(sender, senderDeviceId, message.getTimestamp(), message.getRatchetKey().isEmpty());
 302
 303         for (final var logEntry : logEntries) {
 304             actions.add(new ResendMessageAction(sender, message.getTimestamp(), logEntry));
 305         }
 306
 307         if (message.getRatchetKey().isPresent()) {
 308             if (account.getSessionStore().isCurrentRatchetKey(sender, senderDeviceId, message.getRatchetKey().get())) {
 309                 if (logEntries.isEmpty()) {
 310                     logger.debug("Renewing the session with sender");
 311                     actions.add(new RenewSessionAction(sender));
 312                 } else {
 313                     logger.trace("Archiving the session with sender, a resend message has already been queued");
 314                     context.getAccount().getSessionStore().archiveSessions(sender);
 315                 }
 316             }
 317             return;
 318         }
 319
 320         var found = false;
 321         for (final var logEntry : logEntries) {
 322             if (logEntry.groupId().isEmpty()) {
 323                 continue;
 324             }
 325             final var group = account.getGroupStore().getGroup(logEntry.groupId().get());
 326             if (group == null) {
 327                 continue;
 328             }
 329             found = true;
 330             logger.trace("Deleting shared sender key with {} ({}): {}",
 331                     sender,
 332                     senderDeviceId,
 333                     group.getDistributionId());
 334             account.getSenderKeyStore().deleteSharedWith(sender, senderDeviceId, group.getDistributionId());
 335         }
 336         if (!found) {
 337             logger.debug("Reset all shared sender keys with this recipient, no related message found in send log");
 338             account.getSenderKeyStore().deleteSharedWith(sender);
 339         }
 340     }
 341
 342     private List<HandleAction> handleSyncMessage(
 343             final SignalServiceSyncMessage syncMessage, final RecipientId sender, final boolean ignoreAttachments
 344     ) {
 345         var actions = new ArrayList<HandleAction>();
 346         account.setMultiDevice(true);
 347         if (syncMessage.getSent().isPresent()) {
 348             var message = syncMessage.getSent().get();
 349             final var destination = message.getDestination().orElse(null);
 350             if (message.getDataMessage().isPresent()) {
 351                 actions.addAll(handleSignalServiceDataMessage(message.getDataMessage().get(),
 352                         true,
 353                         sender,
 354                         destination == null ? null : context.getRecipientHelper().resolveRecipient(destination),
 355                         ignoreAttachments));
 356             }
 357             if (message.getStoryMessage().isPresent()) {
 358                 actions.addAll(handleSignalServiceStoryMessage(message.getStoryMessage().get(),
 359                         sender,
 360                         ignoreAttachments));
 361             }
 362         }
 363         if (syncMessage.getRequest().isPresent() && account.isPrimaryDevice()) {
 364             var rm = syncMessage.getRequest().get();
 365             if (rm.isContactsRequest()) {
 366                 actions.add(SendSyncContactsAction.create());
 367             }
 368             if (rm.isGroupsRequest()) {
 369                 actions.add(SendSyncGroupsAction.create());
 370             }
 371             if (rm.isBlockedListRequest()) {
 372                 actions.add(SendSyncBlockedListAction.create());
 373             }
 374             if (rm.isKeysRequest()) {
 375                 actions.add(SendSyncKeysAction.create());
 376             }
 377             if (rm.isConfigurationRequest()) {
 378                 actions.add(SendSyncConfigurationAction.create());
 379             }
 380             if (rm.isPniIdentityRequest()) {
 381                 actions.add(SendPniIdentityKeyAction.create());
 382             }
 383         }
 384         if (syncMessage.getGroups().isPresent()) {
 385             try {
 386                 final var groupsMessage = syncMessage.getGroups().get();
 387                 context.getAttachmentHelper()
 388                         .retrieveAttachment(groupsMessage, context.getSyncHelper()::handleSyncDeviceGroups);
 389             } catch (Exception e) {
 390                 logger.warn("Failed to handle received sync groups, ignoring: {}", e.getMessage());
 391             }
 392         }
 393         if (syncMessage.getBlockedList().isPresent()) {
 394             final var blockedListMessage = syncMessage.getBlockedList().get();
 395             for (var address : blockedListMessage.getAddresses()) {
 396                 context.getContactHelper()
 397                         .setContactBlocked(context.getRecipientHelper().resolveRecipient(address), true);
 398             }
 399             for (var groupId : blockedListMessage.getGroupIds()
 400                     .stream()
 401                     .map(GroupId::unknownVersion)
 402                     .collect(Collectors.toSet())) {
 403                 try {
 404                     context.getGroupHelper().setGroupBlocked(groupId, true);
 405                 } catch (GroupNotFoundException e) {
 406                     logger.warn("BlockedListMessage contained groupID that was not found in GroupStore: {}",
 407                             groupId.toBase64());
 408                 }
 409             }
 410         }
 411         if (syncMessage.getContacts().isPresent()) {
 412             try {
 413                 final var contactsMessage = syncMessage.getContacts().get();
 414                 context.getAttachmentHelper()
 415                         .retrieveAttachment(contactsMessage.getContactsStream(),
 416                                 context.getSyncHelper()::handleSyncDeviceContacts);
 417             } catch (Exception e) {
 418                 logger.warn("Failed to handle received sync contacts, ignoring: {}", e.getMessage());
 419             }
 420         }
 421         if (syncMessage.getVerified().isPresent()) {
 422             final var verifiedMessage = syncMessage.getVerified().get();
 423             account.getIdentityKeyStore()
 424                     .setIdentityTrustLevel(account.getRecipientTrustedResolver()
 425                                     .resolveRecipientTrusted(verifiedMessage.getDestination()),
 426                             verifiedMessage.getIdentityKey(),
 427                             TrustLevel.fromVerifiedState(verifiedMessage.getVerified()));
 428         }
 429         if (syncMessage.getStickerPackOperations().isPresent()) {
 430             final var stickerPackOperationMessages = syncMessage.getStickerPackOperations().get();
 431             for (var m : stickerPackOperationMessages) {
 432                 if (m.getPackId().isEmpty()) {
 433                     continue;
 434                 }
 435                 final var stickerPackId = StickerPackId.deserialize(m.getPackId().get());
 436                 final var installed = m.getType().isEmpty()
 437                         || m.getType().get() == StickerPackOperationMessage.Type.INSTALL;
 438
 439                 var sticker = account.getStickerStore().getStickerPack(stickerPackId);
 440                 if (m.getPackKey().isPresent()) {
 441                     if (sticker == null) {
 442                         sticker = new Sticker(stickerPackId, m.getPackKey().get());
 443                     }
 444                     if (installed) {
 445                         context.getJobExecutor()
 446                                 .enqueueJob(new RetrieveStickerPackJob(stickerPackId, m.getPackKey().get()));
 447                     }
 448                 }
 449
 450                 if (sticker != null) {
 451                     sticker.setInstalled(installed);
 452                     account.getStickerStore().updateSticker(sticker);
 453                 }
 454             }
 455         }
 456         if (syncMessage.getFetchType().isPresent()) {
 457             switch (syncMessage.getFetchType().get()) {
 458                 case LOCAL_PROFILE:
 459                     actions.add(new RetrieveProfileAction(account.getSelfRecipientId()));
 460                 case STORAGE_MANIFEST:
 461                     actions.add(RetrieveStorageDataAction.create());
 462             }
 463         }
 464         if (syncMessage.getKeys().isPresent()) {
 465             final var keysMessage = syncMessage.getKeys().get();
 466             if (keysMessage.getStorageService().isPresent()) {
 467                 final var storageKey = keysMessage.getStorageService().get();
 468                 account.setStorageKey(storageKey);
 469                 actions.add(RetrieveStorageDataAction.create());
 470             }
 471         }
 472         if (syncMessage.getConfiguration().isPresent()) {
 473             final var configurationMessage = syncMessage.getConfiguration().get();
 474             final var configurationStore = account.getConfigurationStore();
 475             if (configurationMessage.getReadReceipts().isPresent()) {
 476                 configurationStore.setReadReceipts(configurationMessage.getReadReceipts().get());
 477             }
 478             if (configurationMessage.getLinkPreviews().isPresent()) {
 479                 configurationStore.setLinkPreviews(configurationMessage.getLinkPreviews().get());
 480             }
 481             if (configurationMessage.getTypingIndicators().isPresent()) {
 482                 configurationStore.setTypingIndicators(configurationMessage.getTypingIndicators().get());
 483             }
 484             if (configurationMessage.getUnidentifiedDeliveryIndicators().isPresent()) {
 485                 configurationStore.setUnidentifiedDeliveryIndicators(configurationMessage.getUnidentifiedDeliveryIndicators()
 486                         .get());
 487             }
 488         }
 489         if (syncMessage.getPniIdentity().isPresent()) {
 490             final var pniIdentity = syncMessage.getPniIdentity().get();
 491             account.setPniIdentityKeyPair(KeyUtils.getIdentityKeyPair(pniIdentity.getPublicKey().toByteArray(),
 492                     pniIdentity.getPrivateKey().toByteArray()));
 493             actions.add(RefreshPreKeysAction.create());
 494         }
 495         // TODO handle PniChangeNumber
 496         return actions;
 497     }
 498
 499     private boolean isMessageBlocked(SignalServiceEnvelope envelope, SignalServiceContent content) {
 500         SignalServiceAddress source;
 501         if (!envelope.isUnidentifiedSender() && envelope.hasSourceUuid()) {
 502             source = envelope.getSourceAddress();
 503         } else if (content != null) {
 504             source = content.getSender();
 505         } else {
 506             return false;
 507         }
 508         final var recipientId = context.getRecipientHelper().resolveRecipient(source);
 509         if (context.getContactHelper().isContactBlocked(recipientId)) {
 510             return true;
 511         }
 512
 513         if (content != null && content.getDataMessage().isPresent()) {
 514             var message = content.getDataMessage().get();
 515             if (message.getGroupContext().isPresent()) {
 516                 var groupId = GroupUtils.getGroupId(message.getGroupContext().get());
 517                 return context.getGroupHelper().isGroupBlocked(groupId);
 518             }
 519         }
 520
 521         return false;
 522     }
 523
 524     private boolean isNotAllowedToSendToGroup(SignalServiceEnvelope envelope, SignalServiceContent content) {
 525         SignalServiceAddress source;
 526         if (!envelope.isUnidentifiedSender() && envelope.hasSourceUuid()) {
 527             source = envelope.getSourceAddress();
 528         } else if (content != null) {
 529             source = content.getSender();
 530         } else {
 531             return false;
 532         }
 533
 534         if (content == null || content.getDataMessage().isEmpty()) {
 535             return false;
 536         }
 537
 538         var message = content.getDataMessage().get();
 539         if (message.getGroupContext().isEmpty()) {
 540             return false;
 541         }
 542
 543         if (message.getGroupContext().get().getGroupV1().isPresent()) {
 544             var groupInfo = message.getGroupContext().get().getGroupV1().get();
 545             if (groupInfo.getType() == SignalServiceGroup.Type.QUIT) {
 546                 return false;
 547             }
 548         }
 549
 550         var groupId = GroupUtils.getGroupId(message.getGroupContext().get());
 551         var group = context.getGroupHelper().getGroup(groupId);
 552         if (group == null) {
 553             return false;
 554         }
 555
 556         final var recipientId = context.getRecipientHelper().resolveRecipient(source);
 557         if (!group.isMember(recipientId) && !(group.isPendingMember(recipientId) && message.isGroupV2Update())) {
 558             return true;
 559         }
 560
 561         if (group.isAnnouncementGroup() && !group.isAdmin(recipientId)) {
 562             return message.getBody().isPresent()
 563                     || message.getAttachments().isPresent()
 564                     || message.getQuote()
 565                     .isPresent()
 566                     || message.getPreviews().isPresent()
 567                     || message.getMentions().isPresent()
 568                     || message.getSticker().isPresent();
 569         }
 570         return false;
 571     }
 572
 573     private List<HandleAction> handleSignalServiceDataMessage(
 574             SignalServiceDataMessage message,
 575             boolean isSync,
 576             RecipientId source,
 577             RecipientId destination,
 578             boolean ignoreAttachments
 579     ) {
 580         var actions = new ArrayList<HandleAction>();
 581         if (message.getGroupContext().isPresent()) {
 582             final var groupContext = message.getGroupContext().get();
 583             if (groupContext.getGroupV1().isPresent()) {
 584                 var groupInfo = groupContext.getGroupV1().get();
 585                 var groupId = GroupId.v1(groupInfo.getGroupId());
 586                 var group = context.getGroupHelper().getGroup(groupId);
 587                 if (group == null || group instanceof GroupInfoV1) {
 588                     var groupV1 = (GroupInfoV1) group;
 589                     switch (groupInfo.getType()) {
 590                         case UPDATE: {
 591                             if (groupV1 == null) {
 592                                 groupV1 = new GroupInfoV1(groupId);
 593                             }
 594
 595                             if (groupInfo.getAvatar().isPresent()) {
 596                                 var avatar = groupInfo.getAvatar().get();
 597                                 context.getGroupHelper().downloadGroupAvatar(groupV1.getGroupId(), avatar);
 598                             }
 599
 600                             if (groupInfo.getName().isPresent()) {
 601                                 groupV1.name = groupInfo.getName().get();
 602                             }
 603
 604                             if (groupInfo.getMembers().isPresent()) {
 605                                 groupV1.addMembers(groupInfo.getMembers()
 606                                         .get()
 607                                         .stream()
 608                                         .map(context.getRecipientHelper()::resolveRecipient)
 609                                         .collect(Collectors.toSet()));
 610                             }
 611
 612                             account.getGroupStore().updateGroup(groupV1);
 613                             break;
 614                         }
 615                         case DELIVER:
 616                             if (groupV1 == null && !isSync) {
 617                                 actions.add(new SendGroupInfoRequestAction(source, groupId));
 618                             }
 619                             break;
 620                         case QUIT: {
 621                             if (groupV1 != null) {
 622                                 groupV1.removeMember(source);
 623                                 account.getGroupStore().updateGroup(groupV1);
 624                             }
 625                             break;
 626                         }
 627                         case REQUEST_INFO:
 628                             if (groupV1 != null && !isSync) {
 629                                 actions.add(new SendGroupInfoAction(source, groupV1.getGroupId()));
 630                             }
 631                             break;
 632                     }
 633                 } else {
 634                     // Received a group v1 message for a v2 group
 635                 }
 636             }
 637             if (groupContext.getGroupV2().isPresent()) {
 638                 handleGroupV2Context(groupContext.getGroupV2().get());
 639             }
 640         }
 641
 642         final var conversationPartnerAddress = isSync ? destination : source;
 643         if (conversationPartnerAddress != null && message.isEndSession()) {
 644             account.getSessionStore().deleteAllSessions(conversationPartnerAddress);
 645         }
 646         if (message.isExpirationUpdate() || message.getBody().isPresent()) {
 647             if (message.getGroupContext().isPresent()) {
 648                 final var groupContext = message.getGroupContext().get();
 649                 if (groupContext.getGroupV1().isPresent()) {
 650                     var groupInfo = groupContext.getGroupV1().get();
 651                     var group = account.getGroupStore().getOrCreateGroupV1(GroupId.v1(groupInfo.getGroupId()));
 652                     if (group != null) {
 653                         if (group.messageExpirationTime != message.getExpiresInSeconds()) {
 654                             group.messageExpirationTime = message.getExpiresInSeconds();
 655                             account.getGroupStore().updateGroup(group);
 656                         }
 657                     }
 658                 } else if (groupContext.getGroupV2().isPresent()) {
 659                     // disappearing message timer already stored in the DecryptedGroup
 660                 }
 661             } else if (conversationPartnerAddress != null) {
 662                 context.getContactHelper()
 663                         .setExpirationTimer(conversationPartnerAddress, message.getExpiresInSeconds());
 664             }
 665         }
 666         if (!ignoreAttachments) {
 667             if (message.getAttachments().isPresent()) {
 668                 for (var attachment : message.getAttachments().get()) {
 669                     context.getAttachmentHelper().downloadAttachment(attachment);
 670                 }
 671             }
 672             if (message.getSharedContacts().isPresent()) {
 673                 for (var contact : message.getSharedContacts().get()) {
 674                     if (contact.getAvatar().isPresent()) {
 675                         context.getAttachmentHelper().downloadAttachment(contact.getAvatar().get().getAttachment());
 676                     }
 677                 }
 678             }
 679             if (message.getPreviews().isPresent()) {
 680                 final var previews = message.getPreviews().get();
 681                 for (var preview : previews) {
 682                     if (preview.getImage().isPresent()) {
 683                         context.getAttachmentHelper().downloadAttachment(preview.getImage().get());
 684                     }
 685                 }
 686             }
 687             if (message.getQuote().isPresent()) {
 688                 final var quote = message.getQuote().get();
 689
 690                 for (var quotedAttachment : quote.getAttachments()) {
 691                     final var thumbnail = quotedAttachment.getThumbnail();
 692                     if (thumbnail != null) {
 693                         context.getAttachmentHelper().downloadAttachment(thumbnail);
 694                     }
 695                 }
 696             }
 697         }
 698         if (message.getProfileKey().isPresent()) {
 699             handleIncomingProfileKey(message.getProfileKey().get(), source);
 700         }
 701         if (message.getSticker().isPresent()) {
 702             final var messageSticker = message.getSticker().get();
 703             final var stickerPackId = StickerPackId.deserialize(messageSticker.getPackId());
 704             var sticker = account.getStickerStore().getStickerPack(stickerPackId);
 705             if (sticker == null) {
 706                 sticker = new Sticker(stickerPackId, messageSticker.getPackKey());
 707                 account.getStickerStore().updateSticker(sticker);
 708             }
 709             context.getJobExecutor().enqueueJob(new RetrieveStickerPackJob(stickerPackId, messageSticker.getPackKey()));
 710         }
 711         return actions;
 712     }
 713
 714     private List<HandleAction> handleSignalServiceStoryMessage(
 715             SignalServiceStoryMessage message, RecipientId source, boolean ignoreAttachments
 716     ) {
 717         var actions = new ArrayList<HandleAction>();
 718         if (message.getGroupContext().isPresent()) {
 719             handleGroupV2Context(message.getGroupContext().get());
 720         }
 721
 722         if (!ignoreAttachments) {
 723             if (message.getFileAttachment().isPresent()) {
 724                 context.getAttachmentHelper().downloadAttachment(message.getFileAttachment().get());
 725             }
 726             if (message.getTextAttachment().isPresent()) {
 727                 final var textAttachment = message.getTextAttachment().get();
 728                 if (textAttachment.getPreview().isPresent()) {
 729                     final var preview = textAttachment.getPreview().get();
 730                     if (preview.getImage().isPresent()) {
 731                         context.getAttachmentHelper().downloadAttachment(preview.getImage().get());
 732                     }
 733                 }
 734             }
 735         }
 736
 737         if (message.getProfileKey().isPresent()) {
 738             handleIncomingProfileKey(message.getProfileKey().get(), source);
 739         }
 740
 741         return actions;
 742     }
 743
 744     private void handleGroupV2Context(final SignalServiceGroupV2 groupContext) {
 745         final var groupMasterKey = groupContext.getMasterKey();
 746
 747         context.getGroupHelper()
 748                 .getOrMigrateGroup(groupMasterKey,
 749                         groupContext.getRevision(),
 750                         groupContext.hasSignedGroupChange() ? groupContext.getSignedGroupChange() : null);
 751     }
 752
 753     private void handleIncomingProfileKey(final byte[] profileKeyBytes, final RecipientId source) {
 754         if (profileKeyBytes.length != 32) {
 755             logger.debug("Received invalid profile key of length {}", profileKeyBytes.length);
 756             return;
 757         }
 758         final ProfileKey profileKey;
 759         try {
 760             profileKey = new ProfileKey(profileKeyBytes);
 761         } catch (InvalidInputException e) {
 762             throw new AssertionError(e);
 763         }
 764         if (account.getSelfRecipientId().equals(source)) {
 765             this.account.setProfileKey(profileKey);
 766         }
 767         this.account.getProfileStore().storeProfileKey(source, profileKey);
 768     }
 769
 770     private Pair<RecipientId, Integer> getSender(SignalServiceEnvelope envelope, SignalServiceContent content) {
 771         if (!envelope.isUnidentifiedSender() && envelope.hasSourceUuid()) {
 772             return new Pair<>(context.getRecipientHelper().resolveRecipient(envelope.getSourceAddress()),
 773                     envelope.getSourceDevice());
 774         } else {
 775             return new Pair<>(context.getRecipientHelper().resolveRecipient(content.getSender()),
 776                     content.getSenderDevice());
 777         }
 778     }
 779 }