You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
66 lines
1.2 KiB
66 lines
1.2 KiB
#ifndef CRYPTOPP_GF256_H |
|
#define CRYPTOPP_GF256_H |
|
|
|
#include "cryptlib.h" |
|
|
|
NAMESPACE_BEGIN(CryptoPP) |
|
|
|
//! GF(256) with polynomial basis |
|
class GF256 |
|
{ |
|
public: |
|
typedef byte Element; |
|
typedef int RandomizationParameter; |
|
|
|
GF256(byte modulus) : m_modulus(modulus) {} |
|
|
|
Element RandomElement(RandomNumberGenerator &rng, int ignored = 0) const |
|
{return rng.GenerateByte();} |
|
|
|
bool Equal(Element a, Element b) const |
|
{return a==b;} |
|
|
|
Element Zero() 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 One() 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: |
|
word m_modulus; |
|
}; |
|
|
|
NAMESPACE_END |
|
|
|
#endif
|
|
|