private void handleStaleDevices(TextSecureAddress recipient, StaleDevices staleDevices)
{
foreach (uint staleDeviceId in staleDevices.getStaleDevices())
{
store.DeleteSession(new AxolotlAddress(recipient.getNumber(), staleDeviceId));
}
}
private async void handleMismatchedDevices(PushServiceSocket socket, TextSecureAddress recipient,
MismatchedDevices mismatchedDevices)
{
try
{
foreach (uint extraDeviceId in mismatchedDevices.getExtraDevices())
{
store.DeleteSession(new AxolotlAddress(recipient.getNumber(), extraDeviceId));
}
foreach (uint missingDeviceId in mismatchedDevices.getMissingDevices())
{
PreKeyBundle preKey = await socket.getPreKey(recipient, missingDeviceId);
try
{
SessionBuilder sessionBuilder = new SessionBuilder(store, new AxolotlAddress(recipient.getNumber(), missingDeviceId));
sessionBuilder.process(preKey);
}
catch (libaxolotl.exceptions.UntrustedIdentityException e)
{
throw new UntrustedIdentityException("Untrusted identity key!", recipient.getNumber(), preKey.getIdentityKey());
}
}
}
catch (InvalidKeyException e)
{
throw new Exception(e.Message);
}
}
/**
* Construct a TextSecureMessageSender.
*
* @param url The URL of the TextSecure server.
* @param trustStore The trust store containing the TextSecure server's signing TLS certificate.
* @param user The TextSecure username (eg phone number).
* @param password The TextSecure user's password.
* @param store The AxolotlStore.
* @param eventListener An optional event listener, which fires whenever sessions are
* setup or torn down for a recipient.
*/
public TextSecureMessageSender(String url, TrustStore trustStore,
String user, String password,
AxolotlStore store,
May <EventListener> eventListener, String userAgent)
{
this.socket = new PushServiceSocket(url, trustStore, new StaticCredentialsProvider(user, password, null), userAgent);
this.store = store;
this.localAddress = new TextSecureAddress(user);
this.eventListener = eventListener;
}
private async Task <OutgoingPushMessageList> getEncryptedMessages(PushServiceSocket socket,
TextSecureAddress recipient,
ulong timestamp,
byte[] plaintext,
bool legacy)
{
List <OutgoingPushMessage> messages = new List <OutgoingPushMessage>();
if (!recipient.Equals(localAddress))
{
messages.Add(await getEncryptedMessage(socket, recipient, TextSecureAddress.DEFAULT_DEVICE_ID, plaintext, legacy));
}
foreach (uint deviceId in store.GetSubDeviceSessions(recipient.getNumber()))
{
messages.Add(await getEncryptedMessage(socket, recipient, deviceId, plaintext, legacy));
}
return(new OutgoingPushMessageList(recipient.getNumber(), timestamp, recipient.getRelay().HasValue ? recipient.getRelay().ForceGetValue() : null, messages));
}
private void deliver(SmsMessageRecord message)
{
try
{
TextSecureAddress address = getPushAddress(message.getIndividualRecipient().getNumber());
TextSecureDataMessage textSecureMessage = TextSecureDataMessage.newBuilder()
.withTimestamp((ulong)TimeUtil.GetUnixTimestampMillis(message.getDateSent()))
.withBody(message.getBody().getBody())
.asEndSessionMessage(message.isEndSession())
.build();
Debug.WriteLine("TextSendTask deliver");
messageSender.sendMessage(address, textSecureMessage);
}
catch (InvalidNumberException e /*| UnregisteredUserException e*/) {
//Log.w(TAG, e);
//throw new InsecureFallbackApprovalException(e);
} catch (Exception e)
{
//Log.w(TAG, e);
//throw new RetryLaterException(e);
}
}
/**
* Send a message to a single recipient.
*
* @param recipient The message's destination.
* @param message The message.
* @throws UntrustedIdentityException
* @throws IOException
*/
public async void sendMessage(TextSecureAddress recipient, TextSecureDataMessage message)
{
byte[] content = await createMessageContent(message);
ulong timestamp = message.getTimestamp();
SendMessageResponse response = await sendMessage(recipient, timestamp, content, true);
if (response != null && response.getNeedsSync())
{
byte[] syncMessage = createMultiDeviceSentTranscriptContent(content, new May <TextSecureAddress>(recipient), timestamp);
await sendMessage(localAddress, timestamp, syncMessage, false);
}
if (message.isEndSession())
{
store.DeleteAllSessions(recipient.getNumber());
if (eventListener.HasValue)
{
eventListener.ForceGetValue().onSecurityEvent(recipient);
}
}
}
private async Task <SendMessageResponse> sendMessage(TextSecureAddress recipient, ulong timestamp, byte[] content, bool legacy)
{
for (int i = 0; i < 3; i++)
{
try
{
OutgoingPushMessageList messages = await getEncryptedMessages(socket, recipient, timestamp, content, legacy);
return(await socket.sendMessage(messages));
}
catch (MismatchedDevicesException mde)
{
Debug.WriteLine(mde.Message, TAG);
handleMismatchedDevices(socket, recipient, mde.getMismatchedDevices());
}
catch (StaleDevicesException ste)
{
//Log.w(TAG, ste);
handleStaleDevices(recipient, ste.getStaleDevices());
}
}
throw new Exception("Failed to resolve conflicts after 3 attempts!");
}
private void handleMessage(/*MasterSecretUnion masterSecret, */ TextSecureEnvelope envelope /*, Optional<Long> smsMessageId*/)
{
try
{
AxolotlStore axolotlStore = new TextSecureAxolotlStore();
TextSecureAddress localAddress = new TextSecureAddress(TextSecurePreferences.getLocalNumber());
TextSecureCipher cipher = new TextSecureCipher(localAddress, axolotlStore);
TextSecureContent content = cipher.decrypt(envelope);
if (content.getDataMessage().HasValue)
{
TextSecureDataMessage message = content.getDataMessage().ForceGetValue();
if (message.isEndSession())
{
handleEndSessionMessage(/*masterSecret, */ envelope, message /*, smsMessageId*/);
}
//else if (message.isGroupUpdate()) handleGroupMessage(masterSecret, envelope, message, smsMessageId);
//else if (message.getAttachments().isPresent()) handleMediaMessage(masterSecret, envelope, message, smsMessageId);
else
{
handleTextMessage(/*masterSecret, */ envelope, message /*, smsMessageId*/);
}
}
/*else if (content.getSyncMessage().HasValue) TODO: SYNC enable
* {
* TextSecureSyncMessage syncMessage = content.getSyncMessage().ForceGetValue();
*
* if (syncMessage.getSent().HasValue) handleSynchronizeSentMessage(masterSecret, syncMessage.getSent().ForceGetValue(), smsMessageId);
* else if (syncMessage.getRequest().HasValue) handleSynchronizeRequestMessage(masterSecret, syncMessage.getRequest().ForceGetValue());
* }*/
if (envelope.isPreKeyWhisperMessage())
{
App.Current.Worker.AddTaskActivities(new RefreshPreKeysTask());
//ApplicationContext.getInstance(context).getJobManager().add(new RefreshPreKeysJob(context));
}
}
catch (InvalidVersionException e)
{
//Log.w(TAG, e);
//handleInvalidVersionMessage(masterSecret, envelope, smsMessageId);
}
/* catch (InvalidMessageException | InvalidKeyIdException | InvalidKeyException | MmsException e) {
* Log.w(TAG, e);
* handleCorruptMessage(masterSecret, envelope, smsMessageId);
* } catch (NoSessionException e)
* {
* Log.w(TAG, e);
* handleNoSessionMessage(masterSecret, envelope, smsMessageId);
* }
* catch (LegacyMessageException e)
* {
* Log.w(TAG, e);
* handleLegacyMessage(masterSecret, envelope, smsMessageId);
* }
* catch (DuplicateMessageException e)
* {
* Log.w(TAG, e);
* handleDuplicateMessage(masterSecret, envelope, smsMessageId);
* }
* catch (UntrustedIdentityException e)
* {
* Log.w(TAG, e);
* handleUntrustedIdentityMessage(masterSecret, envelope, smsMessageId);
* }*/
}
public TextSecureCipher(TextSecureAddress localAddress, AxolotlStore axolotlStore)
{
this.axolotlStore = axolotlStore;
this.localAddress = localAddress;
}
/**
* Send a delivery receipt for a received message. It is not necessary to call this
* when receiving messages through {@link org.whispersystems.textsecure.api.TextSecureMessagePipe}.
* @param recipient The sender of the received message you're acknowledging.
* @param messageId The message id of the received message you're acknowledging.
* @throws IOException
*/
public void sendDeliveryReceipt(TextSecureAddress recipient, ulong messageId)
{
this.socket.sendReceipt(recipient.getNumber(), messageId, recipient.getRelay());
}
private async Task <OutgoingPushMessage> getEncryptedMessage(PushServiceSocket socket, TextSecureAddress recipient, uint deviceId, byte[] plaintext, bool legacy)
{
AxolotlAddress axolotlAddress = new AxolotlAddress(recipient.getNumber(), deviceId);
TextSecureCipher cipher = new TextSecureCipher(localAddress, store);
if (!store.ContainsSession(axolotlAddress))
{
try
{
List <PreKeyBundle> preKeys = await socket.getPreKeys(recipient, deviceId);
foreach (PreKeyBundle preKey in preKeys)
{
try
{
AxolotlAddress preKeyAddress = new AxolotlAddress(recipient.getNumber(), preKey.getDeviceId());
SessionBuilder sessionBuilder = new SessionBuilder(store, preKeyAddress);
sessionBuilder.process(preKey);
}
catch (libaxolotl.exceptions.UntrustedIdentityException e)
{
throw new UntrustedIdentityException("Untrusted identity key!", recipient.getNumber(), preKey.getIdentityKey());
}
}
if (eventListener.HasValue)
{
eventListener.ForceGetValue().onSecurityEvent(recipient);
}
}
catch (InvalidKeyException e)
{
throw new Exception(e.Message);
}
}
return(cipher.encrypt(axolotlAddress, plaintext, legacy));
}
