cast128.h

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/*
* CAST-128
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
 
#ifndef BOTAN_CAST128_H__
#define BOTAN_CAST128_H__
 
#include <botan/block_cipher.h>
 
namespace Botan {
 
/**
* CAST-128
*/
class BOTAN_DLL CAST_128 : public Block_Cipher_Fixed_Params<8, 11, 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(MK); zeroise(RK); }
      std::string name() const { return "CAST-128"; }
      BlockCipher* clone() const { return new CAST_128; }
 
      CAST_128() : MK(16), RK(16) {}
   private:
      void key_schedule(const byte[], size_t);
 
      static void cast_ks(MemoryRegion<u32bit>& ks,
                          MemoryRegion<u32bit>& user_key);
 
      static const u32bit S5[256];
      static const u32bit S6[256];
      static const u32bit S7[256];
      static const u32bit S8[256];
 
      SecureVector<u32bit> MK, RK;
   };
 
extern const u32bit CAST_SBOX1[256];
extern const u32bit CAST_SBOX2[256];
extern const u32bit CAST_SBOX3[256];
extern const u32bit CAST_SBOX4[256];
 
}
 
#endif