gost_A.hpp

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//---------------------------------------------------------------------------//
// Copyright (c) 2018-2021 Mikhail Komarov <nemo@nil.foundation>
// Copyright (c) 2020-2021 Nikita Kaskov <nbering@nil.foundation>
//
// MIT License
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// furnished to do so, subject to the following conditions:
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// The above copyright notice and this permission notice shall be included in all
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//---------------------------------------------------------------------------//
 
#ifndef CRYPTO3_ALGEBRA_CURVES_GOST_A_HPP
#define CRYPTO3_ALGEBRA_CURVES_GOST_A_HPP
 
#include <nil/crypto3/algebra/fields/gost_A/base_field.hpp>
#include <nil/crypto3/algebra/fields/gost_A/scalar_field.hpp>
 
#include <nil/crypto3/detail/literals.hpp>
 
namespace nil {
    namespace crypto3 {
        namespace algebra {
            namespace curves {
 
                template<std::size_t PBits>
                struct gost_A { };
 
                template<>
                struct gost_A<256> {
                    constexpr static const std::size_t base_field_bits = 256;
                    typedef fields::gost_A_fq<base_field_bits> base_field_type;
                    typedef typename base_field_type::integral_type integral_type;
                    constexpr static const integral_type base_field_modulus = base_field_type::modulus;
 
                    constexpr static const std::size_t scalar_field_bits = 256;
                    typedef fields::gost_A_fr<scalar_field_bits> scalar_field_type;
                    constexpr static const integral_type scalar_field_modulus = scalar_field_type::modulus;
 
                    typedef typename detail::gost_A_g1<256> g1_type;
                    typedef typename detail::gost_A_g2<256> g2_type;
 
                    typedef typename fields::fp ? ? <base_field_type>::value_type gt_type;
 
                    constexpr static const integral_type p = base_field_modulus;
                    constexpr static const integral_type q = scalar_field_modulus;
 
                    constexpr static const integral_type a =
                        0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFD94_cppui256;
                    constexpr static const integral_type b = 0xA6_cppui256;
                    constexpr static const integral_type x = 0x1_cppui256;
                    constexpr static const integral_type y =
                        0x8D91E471E0989CDA27DF505A453F2B7635294F2DDF23E3B122ACC99C9E9F1E14_cppui256;
                };
            }    // namespace curves
        }        // namespace algebra
    }            // namespace crypto3
}    // namespace nil
 
#endif    // CRYPTO3_ALGEBRA_CURVES_GOST_A_HPP