7#include <botan/internal/poly_dbl.h>
8#include <botan/internal/loadstor.h>
9#include <botan/exceptn.h>
22enum class MinWeightPolynomial : uint64_t {
31template<
size_t LIMBS, MinWeightPolynomial P>
32void poly_double(uint8_t out[],
const uint8_t in[])
37 const uint64_t POLY =
static_cast<uint64_t
>(P);
39 const uint64_t
carry = POLY * (W[0] >> 63);
41 if constexpr(LIMBS > 0)
43 for(
size_t i = 0; i != LIMBS - 1; ++i)
44 W[i] = (W[i] << 1) ^ (W[i+1] >> 63);
47 W[LIMBS-1] = (W[LIMBS-1] << 1) ^
carry;
52template<
size_t LIMBS, MinWeightPolynomial P>
53void poly_double_le(uint8_t out[],
const uint8_t in[])
58 const uint64_t POLY =
static_cast<uint64_t
>(P);
60 const uint64_t
carry = POLY * (W[LIMBS-1] >> 63);
62 if constexpr(LIMBS > 0)
64 for(
size_t i = 0; i != LIMBS - 1; ++i)
65 W[LIMBS-1-i] = (W[LIMBS-1-i] << 1) ^ (W[LIMBS-2-i] >> 63);
68 W[0] = (W[0] << 1) ^
carry;
80 return poly_double<1, MinWeightPolynomial::P64>(out, in);
82 return poly_double<2, MinWeightPolynomial::P128>(out, in);
84 return poly_double<3, MinWeightPolynomial::P192>(out, in);
86 return poly_double<4, MinWeightPolynomial::P256>(out, in);
88 return poly_double<8, MinWeightPolynomial::P512>(out, in);
90 return poly_double<16, MinWeightPolynomial::P1024>(out, in);
101 return poly_double_le<1, MinWeightPolynomial::P64>(out, in);
103 return poly_double_le<2, MinWeightPolynomial::P128>(out, in);
105 return poly_double_le<3, MinWeightPolynomial::P192>(out, in);
107 return poly_double_le<4, MinWeightPolynomial::P256>(out, in);
109 return poly_double_le<8, MinWeightPolynomial::P512>(out, in);
111 return poly_double_le<16, MinWeightPolynomial::P1024>(out, in);
void copy_out_le(uint8_t out[], size_t out_bytes, const T in[])
void carry(int64_t &h0, int64_t &h1)
void poly_double_n_le(uint8_t out[], const uint8_t in[], size_t n)
constexpr T load_le(const uint8_t in[], size_t off)
void poly_double_n(uint8_t out[], const uint8_t in[], size_t n)
void copy_out_be(uint8_t out[], size_t out_bytes, const T in[])
constexpr T load_be(const uint8_t in[], size_t off)