skipjack.h

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/*
* Skipjack
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
 
#ifndef BOTAN_SKIPJACK_H__
#define BOTAN_SKIPJACK_H__
 
#include <botan/block_cipher.h>
 
namespace Botan {
 
/**
* Skipjack, a NSA designed cipher used in Fortezza
*/
class BOTAN_DLL Skipjack : public Block_Cipher_Fixed_Params<8, 10>
   {
   public:
      void encrypt_n(const byte in[], byte out[], size_t blocks) const;
      void decrypt_n(const byte in[], byte out[], size_t blocks) const;
 
      void clear();
      std::string name() const { return "Skipjack"; }
      BlockCipher* clone() const { return new Skipjack; }
 
      Skipjack() : FTAB(2560) {}
   private:
      void key_schedule(const byte[], size_t);
 
      SecureVector<byte> FTAB;
   };
 
}
 
#endif