Botan  1.10.9
serpent.h
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1 /*
2 * Serpent
3 * (C) 1999-2007 Jack Lloyd
4 *
5 * Distributed under the terms of the Botan license
6 */
7 
8 #ifndef BOTAN_SERPENT_H__
9 #define BOTAN_SERPENT_H__
10 
11 #include <botan/block_cipher.h>
12 
13 namespace Botan {
14 
15 /**
16 * Serpent, an AES finalist
17 */
18 class BOTAN_DLL Serpent : 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() { zeroise(round_key); }
25  std::string name() const { return "Serpent"; }
26  BlockCipher* clone() const { return new Serpent; }
27 
28  Serpent() : round_key(132) {}
29  protected:
30  /**
31  * For use by subclasses using SIMD, asm, etc
32  * @return const reference to the key schedule
33  */
35  { return round_key; }
36 
37  /**
38  * For use by subclasses that implement the key schedule
39  * @param ks is the new key schedule value to set
40  */
41  void set_round_keys(const u32bit ks[132])
42  {
43  copy_mem(&round_key[0], ks, 132);
44  }
45 
46  private:
47  void key_schedule(const byte key[], size_t length);
48  SecureVector<u32bit> round_key;
49  };
50 
51 }
52 
53 #endif
BlockCipher * clone() const
Definition: serpent.h:26
unsigned char byte
Definition: types.h:22
std::string name() const
Definition: serpent.h:25
void set_round_keys(const u32bit ks[132])
Definition: serpent.h:41
void copy_mem(T *out, const T *in, size_t n)
Definition: mem_ops.h:22
const SecureVector< u32bit > & get_round_keys() const
Definition: serpent.h:34
void clear()
Definition: serpent.h:24
void zeroise(MemoryRegion< T > &vec)
Definition: secmem.h:415
unsigned int u32bit
Definition: types.h:32