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Diffstat (limited to 'CryptoPP/gf2_32.h')
| -rw-r--r-- | CryptoPP/gf2_32.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/CryptoPP/gf2_32.h b/CryptoPP/gf2_32.h new file mode 100644 index 000000000..31713f4c0 --- /dev/null +++ b/CryptoPP/gf2_32.h @@ -0,0 +1,66 @@ +#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 |