File: gf2_32.h

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libcrypto++ 8.2.0-2
 `12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273` ``````// gf2_32.h - originally written and placed in the public domain by Wei Dai /// \file gf2_32.h /// \brief Classes and functions for schemes over GF(2^32) #ifndef CRYPTOPP_GF2_32_H #define CRYPTOPP_GF2_32_H #include "cryptlib.h" #include "secblock.h" #include "misc.h" NAMESPACE_BEGIN(CryptoPP) /// \brief 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 {CRYPTOPP_UNUSED(ignored); 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 {CRYPTOPP_UNUSED(a); 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 ``````