Botan  1.10.9
blowfish.h
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1 /*
2 * Blowfish
3 * (C) 1999-2011 Jack Lloyd
4 *
5 * Distributed under the terms of the Botan license
6 */
7 
8 #ifndef BOTAN_BLOWFISH_H__
9 #define BOTAN_BLOWFISH_H__
10 
11 #include <botan/block_cipher.h>
12 
13 namespace Botan {
14 
15 /**
16 * Blowfish
17 */
18 class BOTAN_DLL Blowfish : public Block_Cipher_Fixed_Params<8, 1, 56>
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  /**
25  * Modified EKSBlowfish key schedule, used for bcrypt password hashing
26  */
27  void eks_key_schedule(const byte key[], size_t key_length,
28  const byte salt[16], size_t workfactor);
29 
30  void clear();
31  std::string name() const { return "Blowfish"; }
32  BlockCipher* clone() const { return new Blowfish; }
33 
34  Blowfish() : S(1024), P(18) {}
35  private:
36  void key_schedule(const byte key[], size_t length);
37 
38  void key_expansion(const byte key[],
39  size_t key_length,
40  const byte salt[16]);
41 
42  void generate_sbox(MemoryRegion<u32bit>& box,
43  u32bit& L, u32bit& R,
44  const byte salt[16],
45  size_t salt_off) const;
46 
47  static const u32bit P_INIT[18];
48  static const u32bit S_INIT[1024];
49 
52  };
53 
54 }
55 
56 #endif
BlockCipher * clone() const
Definition: blowfish.h:32
unsigned char byte
Definition: types.h:22
std::string name() const
Definition: blowfish.h:31
unsigned int u32bit
Definition: types.h:32