public byte [] Encrypt(byte [] plain)
{
int div = plain.Length / _tdcsp.Key.Length;
int rem = plain.Length % 16;
if (rem != 0)
{
throw new Exception("must be in 16 byte blocks");
}
byte [] cipher = _tdcsp.EncryptValue(plain);
//just encrypt and throw away the last block
byte [] cipherNoPad = new byte[cipher.Length - _tdcsp.IV.Length];
Array.Copy(cipher, 0, cipherNoPad, 0, cipherNoPad.Length);
return(cipherNoPad);
}