blob: 4bba9e7cfed9366416bc805455a1c1cd6348e587 (
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
64
65
66
|
#ifndef CRYPTOPP_GF2_32_H
#define CRYPTOPP_GF2_32_H
#include "cryptlib.h"
NAMESPACE_BEGIN(CryptoPP)
//! GF(2^32) with polynomial basis
class GF2_32
{
public:
typedef word32 Element;
typedef int RandomizationParameter;
GF2_32(word32 modulus=0x0000008D) : m_modulus(modulus) {}
Element RandomElement(RandomNumberGenerator &rng, int ignored = 0) const
{return rng.GenerateWord32();}
bool Equal(Element a, Element b) const
{return a==b;}
Element Identity() const
{return 0;}
Element Add(Element a, Element b) const
{return a^b;}
Element& Accumulate(Element &a, Element b) const
{return a^=b;}
Element Inverse(Element a) const
{return a;}
Element Subtract(Element a, Element b) const
{return a^b;}
Element& Reduce(Element &a, Element b) const
{return a^=b;}
Element Double(Element a) const
{return 0;}
Element MultiplicativeIdentity() const
{return 1;}
Element Multiply(Element a, Element b) const;
Element Square(Element a) const
{return Multiply(a, a);}
bool IsUnit(Element a) const
{return a != 0;}
Element MultiplicativeInverse(Element a) const;
Element Divide(Element a, Element b) const
{return Multiply(a, MultiplicativeInverse(b));}
private:
word32 m_modulus;
};
NAMESPACE_END
#endif
|
