Botan  2.4.0
Crypto and TLS for C++11
cascade.h
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1 /*
2 * Block Cipher Cascade
3 * (C) 2010 Jack Lloyd
4 *
5 * Botan is released under the Simplified BSD License (see license.txt)
6 */
7 
8 #ifndef BOTAN_CASCADE_H_
9 #define BOTAN_CASCADE_H_
10 
11 #include <botan/block_cipher.h>
12 
13 namespace Botan {
14 
15 /**
16 * Block Cipher Cascade
17 */
18 class BOTAN_PUBLIC_API(2,0) Cascade_Cipher final : public BlockCipher
19  {
20  public:
21  void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
22  void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
23 
24  size_t block_size() const override { return m_block; }
25 
27  {
28  return Key_Length_Specification(m_cipher1->maximum_keylength() +
29  m_cipher2->maximum_keylength());
30  }
31 
32  void clear() override;
33  std::string name() const override;
34  BlockCipher* clone() const override;
35 
36  /**
37  * Create a cascade of two block ciphers
38  * @param cipher1 the first cipher
39  * @param cipher2 the second cipher
40  */
41  Cascade_Cipher(BlockCipher* cipher1, BlockCipher* cipher2);
42 
43  Cascade_Cipher(const Cascade_Cipher&) = delete;
44  Cascade_Cipher& operator=(const Cascade_Cipher&) = delete;
45  private:
46  void key_schedule(const uint8_t[], size_t) override;
47 
48  size_t m_block;
49  std::unique_ptr<BlockCipher> m_cipher1, m_cipher2;
50  };
51 
52 
53 }
54 
55 #endif
Key_Length_Specification key_spec() const override
Definition: cascade.h:26
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:27
size_t block_size() const override
Definition: cascade.h:24
Definition: alg_id.cpp:13