Botan::EC_Mul2Table_Data_BN Class Reference

#include <ec_inner_bn.h>

Inheritance diagram for Botan::EC_Mul2Table_Data_BN:

Public Member Functions
	EC_Mul2Table_Data_BN (const EC_AffinePoint_Data &g, const EC_AffinePoint_Data &h)
std::unique_ptr< EC_AffinePoint_Data >	mul2_vartime (const EC_Scalar_Data &x, const EC_Scalar_Data &y) const override
bool	mul2_vartime_x_mod_order_eq (const EC_Scalar_Data &v, const EC_Scalar_Data &x, const EC_Scalar_Data &y) const override

Detailed Description

Definition at line 91 of file ec_inner_bn.h.

Constructor & Destructor Documentation

EC_Mul2Table_Data_BN()

Botan::EC_Mul2Table_Data_BN::EC_Mul2Table_Data_BN	(	const EC_AffinePoint_Data &	g,
		const EC_AffinePoint_Data &	h )

Definition at line 181 of file ec_inner_bn.cpp.

                                                                                                     :
      m_group(g.group()), m_tbl(g.to_legacy_point(), h.to_legacy_point()) {
   BOTAN_ARG_CHECK(h.group() == m_group, "Curve mismatch");
}

References BOTAN_ARG_CHECK, and Botan::EC_AffinePoint_Data::group().

Member Function Documentation

mul2_vartime()

std::unique_ptr< EC_AffinePoint_Data > Botan::EC_Mul2Table_Data_BN::mul2_vartime ( const EC_Scalar_Data & x, const EC_Scalar_Data & y ) const

overridevirtual

Implements Botan::EC_Mul2Table_Data.

Definition at line 186 of file ec_inner_bn.cpp.

                                                                                                       {
   BOTAN_ARG_CHECK(x.group() == m_group && y.group() == m_group, "Curve mismatch");
 
   const auto& bn_x = EC_Scalar_Data_BN::checked_ref(x);
   const auto& bn_y = EC_Scalar_Data_BN::checked_ref(y);
   auto pt = m_tbl.multi_exp(bn_x.value(), bn_y.value());
 
   if(pt.is_zero()) {
      return nullptr;
   }
   return std::make_unique<EC_AffinePoint_Data_BN>(m_group, std::move(pt));
}

References BOTAN_ARG_CHECK, Botan::EC_Scalar_Data_BN::checked_ref(), and Botan::EC_Scalar_Data::group().

mul2_vartime_x_mod_order_eq()

bool Botan::EC_Mul2Table_Data_BN::mul2_vartime_x_mod_order_eq ( const EC_Scalar_Data & v, const EC_Scalar_Data & x, const EC_Scalar_Data & y ) const

overridevirtual

Implements Botan::EC_Mul2Table_Data.

Definition at line 200 of file ec_inner_bn.cpp.

                                                                                      {
   BOTAN_ARG_CHECK(x.group() == m_group && y.group() == m_group && v.group() == m_group, "Curve mismatch");
 
   const auto& bn_v = EC_Scalar_Data_BN::checked_ref(v);
   const auto& bn_x = EC_Scalar_Data_BN::checked_ref(x);
   const auto& bn_y = EC_Scalar_Data_BN::checked_ref(y);
   const auto pt = m_tbl.multi_exp(bn_x.value(), bn_y.value());
 
   return pt._is_x_eq_to_v_mod_order(bn_v.value());
}

References BOTAN_ARG_CHECK, Botan::EC_Scalar_Data_BN::checked_ref(), and Botan::EC_Scalar_Data::group().

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The documentation for this class was generated from the following files:

• src/lib/pubkey/ec_group/legacy_ec_point/ec_inner_bn.h
• src/lib/pubkey/ec_group/legacy_ec_point/ec_inner_bn.cpp