Botan  2.18.1
Crypto and TLS for C++11
cmac.h
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1 /*
2 * CMAC
3 * (C) 1999-2007,2014 Jack Lloyd
4 *
5 * Botan is released under the Simplified BSD License (see license.txt)
6 */
7 
8 #ifndef BOTAN_CMAC_H_
9 #define BOTAN_CMAC_H_
10 
11 #include <botan/mac.h>
12 #include <botan/block_cipher.h>
13 
15 
16 namespace Botan {
17 
18 /**
19 * CMAC, also known as OMAC1
20 */
22  {
23  public:
24  std::string name() const override;
25  size_t output_length() const override { return m_block_size; }
26  MessageAuthenticationCode* clone() const override;
27 
28  void clear() override;
29 
31  {
32  return m_cipher->key_spec();
33  }
34 
35  /**
36  * CMAC's polynomial doubling operation
37  *
38  * This function was only exposed for use elsewhere in the library, but it is not
39  * longer used. This function will be removed in a future release.
40  *
41  * @param in the input
42  */
44  BOTAN_DEPRECATED("This was only for internal use and is no longer used")
45  poly_double(const secure_vector<uint8_t>& in);
46 
47  /**
48  * @param cipher the block cipher to use
49  */
50  explicit CMAC(BlockCipher* cipher);
51 
52  CMAC(const CMAC&) = delete;
53  CMAC& operator=(const CMAC&) = delete;
54  private:
55  void add_data(const uint8_t[], size_t) override;
56  void final_result(uint8_t[]) override;
57  void key_schedule(const uint8_t[], size_t) override;
58 
59  std::unique_ptr<BlockCipher> m_cipher;
60  secure_vector<uint8_t> m_buffer, m_state, m_B, m_P;
61  const size_t m_block_size;
62  size_t m_position;
63  };
64 
65 }
66 
67 #endif
int(* final)(unsigned char *, CTX *)
#define BOTAN_PUBLIC_API(maj, min)
Definition: compiler.h:31
size_t output_length() const override
Definition: cmac.h:25
Definition: bigint.h:1143
virtual std::string name() const =0
virtual void clear()=0
Definition: alg_id.cpp:13
Key_Length_Specification key_spec() const override
Definition: cmac.h:30
virtual MessageAuthenticationCode * clone() const =0
std::vector< T, secure_allocator< T > > secure_vector
Definition: secmem.h:65
#define BOTAN_FUTURE_INTERNAL_HEADER(hdr)
Definition: compiler.h:136