private byte[] decrypt(SignalServiceEnvelope envelope, byte[] ciphertext)
{
SignalProtocolAddress sourceAddress = new SignalProtocolAddress(envelope.getSource(), (uint)envelope.getSourceDevice());
SessionCipher sessionCipher = new SessionCipher(signalProtocolStore, sourceAddress);
byte[] paddedMessage;
if (envelope.isPreKeySignalMessage())
{
paddedMessage = sessionCipher.decrypt(new PreKeySignalMessage(ciphertext));
}
else if (envelope.isSignalMessage())
{
paddedMessage = sessionCipher.decrypt(new SignalMessage(ciphertext));
}
else
{
throw new InvalidMessageException("Unknown type: " + envelope.getType() + " from " + envelope.getSource());
}
PushTransportDetails transportDetails = new PushTransportDetails(sessionCipher.getSessionVersion());
return(transportDetails.getStrippedPaddingMessageBody(paddedMessage));
}
public void handle(SignalServiceEnvelope envelope, bool sendExplicitReceipt)
{
if (!isActiveNumber(envelope.getSource()))
{
TextSecureDirectory directory = DatabaseFactory.getDirectoryDatabase();
ContactTokenDetails contactTokenDetails = new ContactTokenDetails();
contactTokenDetails.setNumber(envelope.getSource());
directory.setNumber(contactTokenDetails, true);
// TODO: evtl DirectoryRefresh
}
if (envelope.isReceipt())
{
handleReceipt(envelope);
}
else if (envelope.isPreKeySignalMessage() || envelope.isSignalMessage())
{
handleMessage(envelope, sendExplicitReceipt);
}
else
{
Log.Warn($"Received envelope of unknown type: {envelope.GetType()}");
}
}
public void OnMessage(SignalServiceMessagePipeMessage message)
{
if (message is SignalServiceEnvelope)
{
SignalServiceEnvelope envelope = (SignalServiceEnvelope)message;
List <SignalMessage> messages = new List <SignalMessage>();
if (envelope.isReceipt())
{
SignalDBContext.IncreaseReceiptCountLocked(envelope, this);
}
else if (envelope.isPreKeySignalMessage() || envelope.isSignalMessage())
{
HandleMessage(envelope);
}
else
{
Debug.WriteLine("received message of unknown type " + envelope.getType() + " from " + envelope.getSource());
}
}
}