use of org.whispersystems.signalservice.api.crypto.ContentHint in project Signal-Android by signalapp.
the class SignalServiceMessageSender method sendGroupMessage.
/**
* Will send a message using sender keys to all of the specified recipients. It is assumed that
* all of the recipients have UUIDs.
*
* This method will handle sending out SenderKeyDistributionMessages as necessary.
*/
private List<SendMessageResult> sendGroupMessage(DistributionId distributionId, List<SignalServiceAddress> recipients, List<UnidentifiedAccess> unidentifiedAccess, long timestamp, Content content, ContentHint contentHint, byte[] groupId, boolean online, SenderKeyGroupEvents sendEvents) throws IOException, UntrustedIdentityException, NoSessionException, InvalidKeyException, InvalidRegistrationIdException {
if (recipients.isEmpty()) {
Log.w(TAG, "[sendGroupMessage][" + timestamp + "] Empty recipient list!");
return Collections.emptyList();
}
Preconditions.checkArgument(recipients.size() == unidentifiedAccess.size(), "[" + timestamp + "] Unidentified access mismatch!");
Map<ServiceId, UnidentifiedAccess> accessBySid = new HashMap<>();
Iterator<SignalServiceAddress> addressIterator = recipients.iterator();
Iterator<UnidentifiedAccess> accessIterator = unidentifiedAccess.iterator();
while (addressIterator.hasNext()) {
accessBySid.put(addressIterator.next().getServiceId(), accessIterator.next());
}
for (int i = 0; i < RETRY_COUNT; i++) {
GroupTargetInfo targetInfo = buildGroupTargetInfo(recipients);
Set<SignalProtocolAddress> sharedWith = store.getSenderKeySharedWith(distributionId);
List<SignalServiceAddress> needsSenderKey = targetInfo.destinations.stream().filter(a -> !sharedWith.contains(a)).map(a -> ServiceId.parseOrThrow(a.getName())).distinct().map(SignalServiceAddress::new).collect(Collectors.toList());
if (needsSenderKey.size() > 0) {
Log.i(TAG, "[sendGroupMessage][" + timestamp + "] Need to send the distribution message to " + needsSenderKey.size() + " addresses.");
SenderKeyDistributionMessage message = getOrCreateNewGroupSession(distributionId);
List<Optional<UnidentifiedAccessPair>> access = needsSenderKey.stream().map(r -> {
UnidentifiedAccess targetAccess = accessBySid.get(r.getServiceId());
return Optional.of(new UnidentifiedAccessPair(targetAccess, targetAccess));
}).collect(Collectors.toList());
List<SendMessageResult> results = sendSenderKeyDistributionMessage(distributionId, needsSenderKey, access, message, groupId);
List<SignalServiceAddress> successes = results.stream().filter(SendMessageResult::isSuccess).map(SendMessageResult::getAddress).collect(Collectors.toList());
Set<String> successSids = successes.stream().map(a -> a.getServiceId().toString()).collect(Collectors.toSet());
Set<SignalProtocolAddress> successAddresses = targetInfo.destinations.stream().filter(a -> successSids.contains(a.getName())).collect(Collectors.toSet());
store.markSenderKeySharedWith(distributionId, successAddresses);
Log.i(TAG, "[sendGroupMessage][" + timestamp + "] Successfully sent sender keys to " + successes.size() + "/" + needsSenderKey.size() + " recipients.");
int failureCount = results.size() - successes.size();
if (failureCount > 0) {
Log.w(TAG, "[sendGroupMessage][" + timestamp + "] Failed to send sender keys to " + failureCount + " recipients. Sending back failed results now.");
List<SendMessageResult> trueFailures = results.stream().filter(r -> !r.isSuccess()).collect(Collectors.toList());
Set<ServiceId> failedAddresses = trueFailures.stream().map(result -> result.getAddress().getServiceId()).collect(Collectors.toSet());
List<SendMessageResult> fakeNetworkFailures = recipients.stream().filter(r -> !failedAddresses.contains(r.getServiceId())).map(SendMessageResult::networkFailure).collect(Collectors.toList());
List<SendMessageResult> modifiedResults = new LinkedList<>();
modifiedResults.addAll(trueFailures);
modifiedResults.addAll(fakeNetworkFailures);
return modifiedResults;
} else {
targetInfo = buildGroupTargetInfo(recipients);
}
}
sendEvents.onSenderKeyShared();
SignalServiceCipher cipher = new SignalServiceCipher(localAddress, localDeviceId, store, sessionLock, null);
SenderCertificate senderCertificate = unidentifiedAccess.get(0).getUnidentifiedCertificate();
byte[] ciphertext;
try {
ciphertext = cipher.encryptForGroup(distributionId, targetInfo.destinations, senderCertificate, content.toByteArray(), contentHint, groupId);
} catch (org.whispersystems.libsignal.UntrustedIdentityException e) {
throw new UntrustedIdentityException("Untrusted during group encrypt", e.getName(), e.getUntrustedIdentity());
}
sendEvents.onMessageEncrypted();
byte[] joinedUnidentifiedAccess = new byte[16];
for (UnidentifiedAccess access : unidentifiedAccess) {
joinedUnidentifiedAccess = ByteArrayUtil.xor(joinedUnidentifiedAccess, access.getUnidentifiedAccessKey());
}
try {
try {
SendGroupMessageResponse response = new MessagingService.SendResponseProcessor<>(messagingService.sendToGroup(ciphertext, joinedUnidentifiedAccess, timestamp, online).blockingGet()).getResultOrThrow();
return transformGroupResponseToMessageResults(targetInfo.devices, response, content);
} catch (InvalidUnidentifiedAccessHeaderException | NotFoundException | GroupMismatchedDevicesException | GroupStaleDevicesException e) {
// Non-technical failures shouldn't be retried with socket
throw e;
} catch (WebSocketUnavailableException e) {
Log.i(TAG, "[sendGroupMessage][" + timestamp + "] Pipe unavailable, falling back... (" + e.getClass().getSimpleName() + ": " + e.getMessage() + ")");
} catch (IOException e) {
Log.w(TAG, "[sendGroupMessage][" + timestamp + "] Pipe failed, falling back... (" + e.getClass().getSimpleName() + ": " + e.getMessage() + ")");
}
SendGroupMessageResponse response = socket.sendGroupMessage(ciphertext, joinedUnidentifiedAccess, timestamp, online);
return transformGroupResponseToMessageResults(targetInfo.devices, response, content);
} catch (GroupMismatchedDevicesException e) {
Log.w(TAG, "[sendGroupMessage][" + timestamp + "] Handling mismatched devices. (" + e.getMessage() + ")");
for (GroupMismatchedDevices mismatched : e.getMismatchedDevices()) {
SignalServiceAddress address = new SignalServiceAddress(ACI.parseOrThrow(mismatched.getUuid()), Optional.absent());
handleMismatchedDevices(socket, address, mismatched.getDevices());
}
} catch (GroupStaleDevicesException e) {
Log.w(TAG, "[sendGroupMessage][" + timestamp + "] Handling stale devices. (" + e.getMessage() + ")");
for (GroupStaleDevices stale : e.getStaleDevices()) {
SignalServiceAddress address = new SignalServiceAddress(ACI.parseOrThrow(stale.getUuid()), Optional.absent());
handleStaleDevices(address, stale.getDevices());
}
}
Log.w(TAG, "[sendGroupMessage][" + timestamp + "] Attempt failed (i = " + i + ")");
}
throw new IOException("Failed to resolve conflicts after " + RETRY_COUNT + " attempts!");
}
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