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 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());
}
}
}
public long Insert(SignalServiceEnvelope envelope)
{
// TODO check if exists
var push = new Push()
{
Type = envelope.getType(),
Source = envelope.getSource(),
DeviceId = envelope.getSourceDevice(),
LegacyMessage = envelope.hasLegacyMessage() ? Base64.encodeBytes(envelope.getLegacyMessage()) : "",
Content = envelope.hasContent() ? Base64.encodeBytes(envelope.getContent()) : "",
Timestamp = TimeUtil.GetDateTime(envelope.getTimestamp())
};
try
{
conn.Insert(push);
} catch (Exception e) { Debug.WriteLine(e.Message); }
return(push.PushId);
}