Botan  1.10.9
twofish.h
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1 /*
2 * Twofish
3 * (C) 1999-2007 Jack Lloyd
4 *
5 * Distributed under the terms of the Botan license
6 */
7 
8 #ifndef BOTAN_TWOFISH_H__
9 #define BOTAN_TWOFISH_H__
10 
11 #include <botan/block_cipher.h>
12 
13 namespace Botan {
14 
15 /**
16 * Twofish, an AES finalist
17 */
18 class BOTAN_DLL Twofish : public Block_Cipher_Fixed_Params<16, 16, 32, 8>
19  {
20  public:
21  void encrypt_n(const byte in[], byte out[], size_t blocks) const;
22  void decrypt_n(const byte in[], byte out[], size_t blocks) const;
23 
24  void clear();
25  std::string name() const { return "Twofish"; }
26  BlockCipher* clone() const { return new Twofish; }
27 
28  Twofish() : SB(1024), RK(40) {}
29  private:
30  void key_schedule(const byte[], size_t);
31 
32  static void rs_mul(byte[4], byte, size_t);
33 
34  static const u32bit MDS0[256];
35  static const u32bit MDS1[256];
36  static const u32bit MDS2[256];
37  static const u32bit MDS3[256];
38  static const byte Q0[256];
39  static const byte Q1[256];
40  static const byte RS[32];
41  static const byte EXP_TO_POLY[255];
42  static const byte POLY_TO_EXP[255];
43 
44  SecureVector<u32bit> SB, RK;
45  };
46 
47 }
48 
49 #endif
std::string name() const
Definition: twofish.h:25
unsigned char byte
Definition: types.h:22
BlockCipher * clone() const
Definition: twofish.h:26
unsigned int u32bit
Definition: types.h:32