public static extern void TwofishInit(ref TwofishObj Obj);
public static extern void TwofishEncrypt(ref TwofishObj Obj, byte[] input, [In, Out] byte[] output, int len);
public static extern void TwofishEncrypt(ref TwofishObj Obj, byte[] input, [In, Out] byte[] output, int len);
public static extern void TwofishInit(ref TwofishObj Obj);