blob: c1b75cfa518fe2dfe9917f5903aa625237dda009 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
* CMAC
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_CMAC_H__
#define BOTAN_CMAC_H__
#include <botan/mac.h>
#include <botan/block_cipher.h>
namespace Botan {
/**
* CMAC, also known as OMAC1
*/
class BOTAN_DLL CMAC : public MessageAuthenticationCode
{
public:
std::string name() const;
size_t output_length() const { return e->block_size(); }
MessageAuthenticationCode* clone() const;
void clear();
Key_Length_Specification key_spec() const
{
return e->key_spec();
}
/**
* CMAC's polynomial doubling operation
* @param in the input
* @param polynomial the byte value of the polynomial
*/
static secure_vector<byte> poly_double(const secure_vector<byte>& in,
byte polynomial);
/**
* @param cipher the underlying block cipher to use
*/
CMAC(BlockCipher* cipher);
CMAC(const CMAC&) = delete;
CMAC& operator=(const CMAC&) = delete;
~CMAC();
private:
void add_data(const byte[], size_t);
void final_result(byte[]);
void key_schedule(const byte[], size_t);
BlockCipher* e;
secure_vector<byte> buffer, state, B, P;
size_t position;
byte polynomial;
};
}
#endif
|
