private void ReadMessageCallback(IAsyncResult ar)
{
try
{
// Debug.WriteLine("ReadMessageCallback");
var state = (MessageObject)ar.AsyncState;
var handler = state.Client;
var bytesCount = handler.Client.EndReceive(ar);
if (bytesCount > 0)
{
state.BytesCounter += bytesCount;
if (state.BytesCounter == state.MessageBuffer.Length)
{ //done receiving message
_BeginRead(state.Client); //start over again
using (AesCryptoServiceProvider aes = new AesCryptoServiceProvider())
{
aes.KeySize = handler._MySessionKey.Length * 8;
aes.Key = handler._MySessionKey;
var iv = new byte[MessageObject.IVSize];
Buffer.BlockCopy(state.HeaderBuffer, 0, iv, 0, MessageObject.IVSize);
aes.IV = iv;
aes.Mode = CipherMode.CBC;
aes.Padding = PaddingMode.PKCS7;
using (ICryptoTransform decrypt = aes.CreateDecryptor())
{
var arrybuf = decrypt.TransformFinalBlock(state.MessageBuffer, 0, state.MessageBuffer.Length);
Received_Total += state.MessageBuffer.Length;
_Bytes_Received_in_Window += state.MessageBuffer.Length;
UpdateCounters();
if (handler.MessageReceivedEvent != null)
{
handler.MessageReceivedEvent(state.Client, Tcp_Message.FromBuffer(arrybuf));
}
// Debug.WriteLine("ReadMessageCallback DONE");
}
}
}
else
{
handler.Client.BeginReceive(state.MessageBuffer, state.BytesCounter, state.MessageBuffer.Length - state.BytesCounter, 0, new AsyncCallback(ReadMessageCallback), state);
}
}
} catch (Exception e)
{
if (DisconnectEvent != null)
{
DisconnectEvent(this);
}
Debug.WriteLine(e.Message);
}
}
