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
45
46
47
48
49
50
|
/*
* Twofish
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_TWOFISH_H__
#define BOTAN_TWOFISH_H__
#include <botan/block_cipher.h>
namespace Botan {
/**
* Twofish, an AES finalist
*/
class BOTAN_DLL Twofish : public BlockCipher
{
public:
void encrypt_n(const byte in[], byte out[], u32bit blocks) const;
void decrypt_n(const byte in[], byte out[], u32bit blocks) const;
void clear();
std::string name() const { return "Twofish"; }
BlockCipher* clone() const { return new Twofish; }
Twofish() : BlockCipher(16, 16, 32, 8) {}
private:
void key_schedule(const byte[], u32bit);
static void rs_mul(byte[4], byte, u32bit);
static const u32bit MDS0[256];
static const u32bit MDS1[256];
static const u32bit MDS2[256];
static const u32bit MDS3[256];
static const byte Q0[256];
static const byte Q1[256];
static const byte RS[32];
static const byte EXP_TO_POLY[255];
static const byte POLY_TO_EXP[255];
SecureVector<u32bit, 256> SBox0, SBox1, SBox2, SBox3;
SecureVector<u32bit, 40> round_key;
};
}
#endif
|
