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| author | Alexander Harkness <bearbin@gmail.com> | 2013-11-24 15:21:13 +0100 |
|---|---|---|
| committer | Alexander Harkness <bearbin@gmail.com> | 2013-11-24 15:21:13 +0100 |
| commit | 3438e5d3ddf8444f0e31009ffbe8237ef3752c22 (patch) | |
| tree | 7c2f76d5e9281c130e60fb932c4dda89a49863b6 /lib/cryptopp/gf256.h | |
| parent | Moved source to src (diff) | |
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Diffstat (limited to 'lib/cryptopp/gf256.h')
| -rw-r--r-- | lib/cryptopp/gf256.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/lib/cryptopp/gf256.h b/lib/cryptopp/gf256.h new file mode 100644 index 000000000..e0ea74826 --- /dev/null +++ b/lib/cryptopp/gf256.h @@ -0,0 +1,66 @@ +#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 |