#include <pcurves_impl.h>

Public Types
using	Self = MontgomeryRep<Params>

typedef Params::W	W

Static Public Member Functions
static constexpr std::array< W, N >	from_rep (const std::array< W, N > &z)

static constexpr std::array< W, N >	one ()

static constexpr std::array< W, N >	redc (const std::array< W, 2 *N > &z)

static constexpr std::array< W, N >	to_rep (const std::array< W, N > &x)

static constexpr std::array< W, N >	wide_to_rep (const std::array< W, 2 *N > &x)

Static Public Attributes
static constexpr size_t	N = Params::N

static constexpr auto	P = Params::P

static constexpr auto	P_dash = monty_inverse(P[0])

static constexpr auto	R1 = montygomery_r(P)

static constexpr auto	R2 = mul_mod(R1, R1, P)

static constexpr auto	R3 = mul_mod(R1, R2, P)

Detailed Description

template<typename Params>
class Botan::MontgomeryRep< Params >

Definition at line 21 of file pcurves_impl.h.

Member Typedef Documentation

◆ Self

template<typename Params >

using Botan::MontgomeryRep< Params >::Self = MontgomeryRep<Params>

Definition at line 23 of file pcurves_impl.h.

◆ W

template<typename Params >

typedef Params::W Botan::MontgomeryRep< Params >::W

Definition at line 27 of file pcurves_impl.h.

Member Function Documentation

◆ from_rep()

template<typename Params >

static constexpr std::array< W, N > Botan::MontgomeryRep< Params >::from_rep ( const std::array< W, N > & z )

inlinestaticconstexpr

Definition at line 60 of file pcurves_impl.h.

                                                                        {
         std::array<W, 2 * N> ze = {};
         copy_mem(std::span{ze}.template first<N>(), z);
         return Self::redc(ze);
      }

References Botan::copy_mem(), and Botan::MontgomeryRep< Params >::redc().

◆ one()

template<typename Params >

static constexpr std::array< W, N > Botan::MontgomeryRep< Params >::one ( )

inlinestaticconstexpr

Definition at line 37 of file pcurves_impl.h.

37{ return R1; }

Botan::MontgomeryRep::R1

static constexpr auto R1

Definition pcurves_impl.h:33

References Botan::MontgomeryRep< Params >::R1.

◆ redc()

template<typename Params >

static constexpr std::array< W, N > Botan::MontgomeryRep< Params >::redc ( const std::array< W, 2 *N > & z )

inlinestaticconstexpr

Definition at line 39 of file pcurves_impl.h.

                                                                        {
         if constexpr(P_dash == 1) {
            return monty_redc_pdash1(z, P);
         } else {
            return monty_redc(z, P, P_dash);
         }
      }

References Botan::MontgomeryRep< Params >::P, and Botan::MontgomeryRep< Params >::P_dash.

Referenced by Botan::MontgomeryRep< Params >::from_rep(), Botan::MontgomeryRep< Params >::to_rep(), and Botan::MontgomeryRep< Params >::wide_to_rep().

◆ to_rep()

template<typename Params >

static constexpr std::array< W, N > Botan::MontgomeryRep< Params >::to_rep ( const std::array< W, N > & x )

inlinestaticconstexpr

Definition at line 47 of file pcurves_impl.h.

                                                                      {
         std::array<W, 2 * N> z;
         comba_mul<N>(z.data(), x.data(), R2.data());
         return Self::redc(z);
      }

References Botan::comba_mul(), Botan::MontgomeryRep< Params >::R2, and Botan::MontgomeryRep< Params >::redc().

◆ wide_to_rep()

template<typename Params >

static constexpr std::array< W, N > Botan::MontgomeryRep< Params >::wide_to_rep ( const std::array< W, 2 *N > & x )

inlinestaticconstexpr

Definition at line 53 of file pcurves_impl.h.

                                                                               {
         auto redc_x = Self::redc(x);
         std::array<W, 2 * N> z;
         comba_mul<N>(z.data(), redc_x.data(), R3.data());
         return Self::redc(z);
      }