aboutsummaryrefslogtreecommitdiffstats
path: root/include/cast256.h
blob: d55344e993b88021bc02e7d64892bdc571a59a6d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
/*************************************************
* CAST-256 Header File                           *
* (C) 1999-2007 The Botan Project                *
*************************************************/

#ifndef BOTAN_CAST256_H__
#define BOTAN_CAST256_H__

#include <botan/base.h>

namespace Botan {

/*************************************************
* CAST-256                                       *
*************************************************/
class CAST_256 : public BlockCipher
   {
   public:
      void clear() throw() { MK.clear(); RK.clear(); }
      std::string name() const { return "CAST-256"; }
      BlockCipher* clone() const { return new CAST_256; }
      CAST_256() : BlockCipher(16, 4, 32, 4) {}
   private:
      void enc(const byte[], byte[]) const;
      void dec(const byte[], byte[]) const;
      void key(const byte[], u32bit);
      void round1(u32bit&, u32bit, u32bit, u32bit) const;
      void round2(u32bit&, u32bit, u32bit, u32bit) const;
      void round3(u32bit&, u32bit, u32bit, u32bit) const;
      static const u32bit KEY_MASK[192];
      static const byte   KEY_ROT[32];
      SecureBuffer<u32bit, 48> MK;
      SecureBuffer<byte, 48> 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