blob: cd48edd5e75603405ecaeca33522fb2fcf357cb5 (
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
44
|
/*
* CAST-256
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_CAST256_H__
#define BOTAN_CAST256_H__
#include <botan/block_cipher.h>
namespace Botan {
/*
* CAST-256
*/
class BOTAN_DLL 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_schedule(const byte[], u32bit);
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
|
