Botan  2.13.0
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 
14 
15 namespace Botan {
16 
17 /**
18 * Block Cipher Cascade
19 */
21  {
22  public:
23  void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
24  void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const override;
25 
26  size_t block_size() const override { return m_block; }
27 
29  {
30  return Key_Length_Specification(m_cipher1->maximum_keylength() +
31  m_cipher2->maximum_keylength());
32  }
33 
34  void clear() override;
35  std::string name() const override;
36  BlockCipher* clone() const override;
37 
38  /**
39  * Create a cascade of two block ciphers
40  * @param cipher1 the first cipher
41  * @param cipher2 the second cipher
42  */
43  Cascade_Cipher(BlockCipher* cipher1, BlockCipher* cipher2);
44 
45  Cascade_Cipher(const Cascade_Cipher&) = delete;
46  Cascade_Cipher& operator=(const Cascade_Cipher&) = delete;
47  private:
48  void key_schedule(const uint8_t[], size_t) override;
49 
50  size_t m_block;
51  std::unique_ptr<BlockCipher> m_cipher1, m_cipher2;
52  };
53 
54 
55 }
56 
57 #endif
Key_Length_Specification key_spec() const override
Definition: cascade.h:28
virtual void decrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const =0
int(* final)(unsigned char *, CTX *)
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:31
virtual BlockCipher * clone() const =0
virtual std::string name() const =0
size_t block_size() const override
Definition: cascade.h:26
virtual void clear()=0
Definition: alg_id.cpp:13
virtual void encrypt_n(const uint8_t in[], uint8_t out[], size_t blocks) const =0
#define BOTAN_FUTURE_INTERNAL_HEADER(hdr)
Definition: compiler.h:139