Botan 3.11.0
Crypto and TLS for C&
Public Member Functions | Static Public Member Functions | List of all members
Botan::EC_AffinePoint_Data_PC Class Referencefinal

#include <ec_inner_pc.h>

Inheritance diagram for Botan::EC_AffinePoint_Data_PC:
Botan::EC_AffinePoint_Data

Public Member Functions

std::unique_ptr< EC_AffinePoint_Data > clone () const override
 EC_AffinePoint_Data_PC (std::shared_ptr< const EC_Group_Data > group, PCurve::PrimeOrderCurve::AffinePoint pt)
size_t field_element_bytes () const override
const std::shared_ptr< const EC_Group_Data > & group () const override
bool is_identity () const override
std::unique_ptr< EC_AffinePoint_Data > mul (const EC_Scalar_Data &scalar, RandomNumberGenerator &rng) const override
secure_vector< uint8_t > mul_x_only (const EC_Scalar_Data &scalar, RandomNumberGenerator &rng) const override
void serialize_compressed_to (std::span< uint8_t > bytes) const override
void serialize_uncompressed_to (std::span< uint8_t > bytes) const override
void serialize_x_to (std::span< uint8_t > bytes) const override
void serialize_xy_to (std::span< uint8_t > bytes) const override
void serialize_y_to (std::span< uint8_t > bytes) const override
const PCurve::PrimeOrderCurve::AffinePoint & value () const

Static Public Member Functions

static const EC_AffinePoint_Data_PC & checked_ref (const EC_AffinePoint_Data &data)

Detailed Description

Definition at line 60 of file ec_inner_pc.h.

Constructor & Destructor Documentation

◆ EC_AffinePoint_Data_PC()

Botan::EC_AffinePoint_Data_PC::EC_AffinePoint_Data_PC ( std::shared_ptr< const EC_Group_Data > group,
PCurve::PrimeOrderCurve::AffinePoint pt )

Definition at line 86 of file ec_inner_pc.cpp.

87 :
88 m_group(std::move(group)), m_pt(std::move(pt)) {
89 const auto& pcurve = m_group->pcurve();
90
91 if(!pcurve.affine_point_is_identity(m_pt)) {
92 m_xy.resize(1 + 2 * field_element_bytes());
93 pcurve.serialize_point(m_xy, m_pt);
94 }
95}
Botan::EC_AffinePoint_Data_PC::field_element_bytes
size_t field_element_bytes() const override
Definition ec_inner_pc.cpp:129
Botan::EC_AffinePoint_Data_PC::group
const std::shared_ptr< const EC_Group_Data > & group() const override
Definition ec_inner_pc.cpp:109

References group().

Referenced by checked_ref().

Member Function Documentation

◆ checked_ref()

const EC_AffinePoint_Data_PC & Botan::EC_AffinePoint_Data_PC::checked_ref ( const EC_AffinePoint_Data & data)
static

Definition at line 97 of file ec_inner_pc.cpp.

97 {
98 const auto* p = dynamic_cast<const EC_AffinePoint_Data_PC*>(&data);
99 if(p == nullptr) {
100 throw Invalid_State("Failed conversion to EC_AffinePoint_Data_PC");
101 }
102 return *p;
103}
Botan::EC_AffinePoint_Data_PC::EC_AffinePoint_Data_PC
EC_AffinePoint_Data_PC(std::shared_ptr< const EC_Group_Data > group, PCurve::PrimeOrderCurve::AffinePoint pt)
Definition ec_inner_pc.cpp:86

References EC_AffinePoint_Data_PC().

Referenced by Botan::EC_Group_Data::affine_add(), Botan::EC_Group_Data::affine_neg(), Botan::EC_Mul2Table_Data_PC::EC_Mul2Table_Data_PC(), and Botan::EC_Group_Data::mul_px_qy().

◆ clone()

std::unique_ptr< EC_AffinePoint_Data > Botan::EC_AffinePoint_Data_PC::clone ( ) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 105 of file ec_inner_pc.cpp.

105 {
106 return std::make_unique<EC_AffinePoint_Data_PC>(m_group, m_pt);
107}

◆ field_element_bytes()

size_t Botan::EC_AffinePoint_Data_PC::field_element_bytes ( ) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 129 of file ec_inner_pc.cpp.

129 {
130 return m_group->pcurve().field_element_bytes();
131}

Referenced by serialize_compressed_to(), serialize_uncompressed_to(), serialize_x_to(), serialize_xy_to(), and serialize_y_to().

◆ group()

const std::shared_ptr< const EC_Group_Data > & Botan::EC_AffinePoint_Data_PC::group ( ) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 109 of file ec_inner_pc.cpp.

109 {
110 return m_group;
111}

Referenced by EC_AffinePoint_Data_PC().

◆ is_identity()

bool Botan::EC_AffinePoint_Data_PC::is_identity ( ) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 133 of file ec_inner_pc.cpp.

133 {
134 return m_xy.empty();
135}

Referenced by serialize_compressed_to(), serialize_uncompressed_to(), serialize_x_to(), serialize_xy_to(), and serialize_y_to().

◆ mul()

std::unique_ptr< EC_AffinePoint_Data > Botan::EC_AffinePoint_Data_PC::mul ( const EC_Scalar_Data & scalar,
RandomNumberGenerator & rng ) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 113 of file ec_inner_pc.cpp.

114 {
115 BOTAN_ARG_CHECK(scalar.group() == m_group, "Curve mismatch");
116 const auto& k = EC_Scalar_Data_PC::checked_ref(scalar).value();
117 const auto& pcurve = m_group->pcurve();
118 auto pt = pcurve.point_to_affine(pcurve.mul(m_pt, k, rng));
119 return std::make_unique<EC_AffinePoint_Data_PC>(m_group, std::move(pt));
120}
BOTAN_ARG_CHECK
#define BOTAN_ARG_CHECK(expr, msg)
Definition assert.h:33
Botan::EC_Scalar_Data_PC::checked_ref
static const EC_Scalar_Data_PC & checked_ref(const EC_Scalar_Data &data)
Definition ec_inner_pc.cpp:14
Botan::EC_Scalar_Data_PC::value
const auto & value() const
Definition ec_inner_pc.h:53

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

◆ mul_x_only()

secure_vector< uint8_t > Botan::EC_AffinePoint_Data_PC::mul_x_only ( const EC_Scalar_Data & scalar,
RandomNumberGenerator & rng ) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 122 of file ec_inner_pc.cpp.

123 {
124 BOTAN_ARG_CHECK(scalar.group() == m_group, "Curve mismatch");
125 const auto& k = EC_Scalar_Data_PC::checked_ref(scalar).value();
126 return m_group->pcurve().mul_x_only(m_pt, k, rng);
127}

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

◆ serialize_compressed_to()

void Botan::EC_AffinePoint_Data_PC::serialize_compressed_to ( std::span< uint8_t > bytes) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 158 of file ec_inner_pc.cpp.

158 {
159 BOTAN_STATE_CHECK(!this->is_identity());
160 const size_t fe_bytes = this->field_element_bytes();
161 BOTAN_ARG_CHECK(bytes.size() == 1 + fe_bytes, "Invalid output size");
162 const bool y_is_odd = (m_xy.back() & 0x01) == 0x01;
163
164 BufferStuffer stuffer(bytes);
165 stuffer.append(y_is_odd ? 0x03 : 0x02);
166 this->serialize_x_to(stuffer.next(fe_bytes));
167}
BOTAN_STATE_CHECK
#define BOTAN_STATE_CHECK(expr)
Definition assert.h:49
Botan::EC_AffinePoint_Data_PC::is_identity
bool is_identity() const override
Definition ec_inner_pc.cpp:133
Botan::EC_AffinePoint_Data_PC::serialize_x_to
void serialize_x_to(std::span< uint8_t > bytes) const override
Definition ec_inner_pc.cpp:137

References Botan::BufferStuffer::append(), BOTAN_ARG_CHECK, BOTAN_STATE_CHECK, field_element_bytes(), is_identity(), Botan::BufferStuffer::next(), and serialize_x_to().

◆ serialize_uncompressed_to()

void Botan::EC_AffinePoint_Data_PC::serialize_uncompressed_to ( std::span< uint8_t > bytes) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 169 of file ec_inner_pc.cpp.

169 {
170 BOTAN_STATE_CHECK(!this->is_identity());
171 const size_t fe_bytes = this->field_element_bytes();
172 BOTAN_ARG_CHECK(bytes.size() == 1 + 2 * fe_bytes, "Invalid output size");
173 copy_mem(bytes, m_xy);
174}
Botan::copy_mem
constexpr void copy_mem(T *out, const T *in, size_t n)
Definition mem_ops.h:144

References BOTAN_ARG_CHECK, BOTAN_STATE_CHECK, Botan::copy_mem(), field_element_bytes(), and is_identity().

◆ serialize_x_to()

void Botan::EC_AffinePoint_Data_PC::serialize_x_to ( std::span< uint8_t > bytes) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 137 of file ec_inner_pc.cpp.

137 {
138 BOTAN_STATE_CHECK(!this->is_identity());
139 const size_t fe_bytes = this->field_element_bytes();
140 BOTAN_ARG_CHECK(bytes.size() == fe_bytes, "Invalid output size");
141 copy_mem(bytes, std::span{m_xy}.subspan(1, fe_bytes));
142}

References BOTAN_ARG_CHECK, BOTAN_STATE_CHECK, Botan::copy_mem(), field_element_bytes(), and is_identity().

Referenced by serialize_compressed_to().

◆ serialize_xy_to()

void Botan::EC_AffinePoint_Data_PC::serialize_xy_to ( std::span< uint8_t > bytes) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 151 of file ec_inner_pc.cpp.

151 {
152 BOTAN_STATE_CHECK(!this->is_identity());
153 const size_t fe_bytes = this->field_element_bytes();
154 BOTAN_ARG_CHECK(bytes.size() == 2 * fe_bytes, "Invalid output size");
155 copy_mem(bytes, std::span{m_xy}.last(2 * fe_bytes));
156}

References BOTAN_ARG_CHECK, BOTAN_STATE_CHECK, Botan::copy_mem(), field_element_bytes(), and is_identity().

◆ serialize_y_to()

void Botan::EC_AffinePoint_Data_PC::serialize_y_to ( std::span< uint8_t > bytes) const
overridevirtual

Implements Botan::EC_AffinePoint_Data.

Definition at line 144 of file ec_inner_pc.cpp.

144 {
145 BOTAN_STATE_CHECK(!this->is_identity());
146 const size_t fe_bytes = this->field_element_bytes();
147 BOTAN_ARG_CHECK(bytes.size() == fe_bytes, "Invalid output size");
148 copy_mem(bytes, std::span{m_xy}.subspan(1 + fe_bytes, fe_bytes));
149}

References BOTAN_ARG_CHECK, BOTAN_STATE_CHECK, Botan::copy_mem(), field_element_bytes(), and is_identity().

◆ value()

const PCurve::PrimeOrderCurve::AffinePoint & Botan::EC_AffinePoint_Data_PC::value ( ) const
inline

Definition at line 88 of file ec_inner_pc.h.

88{ return m_pt; }
The documentation for this class was generated from the following files:
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