safer_sk.h

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/*
* SAFER-SK
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
 
#ifndef BOTAN_SAFER_SK_H__
#define BOTAN_SAFER_SK_H__
 
#include <botan/block_cipher.h>
 
namespace Botan {
 
/**
* SAFER-SK
*/
class BOTAN_DLL SAFER_SK : public Block_Cipher_Fixed_Params<8, 16>
   {
   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() { zeroise(EK); }
      std::string name() const;
      BlockCipher* clone() const;
 
      /**
      * @param rounds the number of rounds to use - must be between 1
      * and 13
      */
      SAFER_SK(size_t rounds);
   private:
      size_t get_rounds() const { return (EK.size() - 8) / 16; }
      void key_schedule(const byte[], size_t);
 
      SecureVector<byte> EK;
   };
 
}
 
#endif