Botan 3.8.1
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 58 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 81 of file ec_inner_pc.cpp.

82 :
83 m_group(std::move(group)), m_pt(std::move(pt)) {
84 auto& pcurve = m_group->pcurve();
85
86 if(!pcurve.affine_point_is_identity(m_pt)) {
87 m_xy.resize(1 + 2 * field_element_bytes());
88 pcurve.serialize_point(m_xy, m_pt);
89 }
90}
Botan::EC_AffinePoint_Data_PC::field_element_bytes
size_t field_element_bytes() const override
Definition ec_inner_pc.cpp:124
Botan::EC_AffinePoint_Data_PC::group
const std::shared_ptr< const EC_Group_Data > & group() const override
Definition ec_inner_pc.cpp:104

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 92 of file ec_inner_pc.cpp.

92 {
93 const auto* p = dynamic_cast<const EC_AffinePoint_Data_PC*>(&data);
94 if(!p) {
95 throw Invalid_State("Failed conversion to EC_AffinePoint_Data_PC");
96 }
97 return *p;
98}
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:81

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 100 of file ec_inner_pc.cpp.

100 {
101 return std::make_unique<EC_AffinePoint_Data_PC>(m_group, m_pt);
102}

◆ field_element_bytes()

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

Implements Botan::EC_AffinePoint_Data.

Definition at line 124 of file ec_inner_pc.cpp.

124 {
125 return m_group->pcurve().field_element_bytes();
126}

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 104 of file ec_inner_pc.cpp.

104 {
105 return m_group;
106}

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 128 of file ec_inner_pc.cpp.

128 {
129 return m_xy.empty();
130}

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 108 of file ec_inner_pc.cpp.

109 {
110 BOTAN_ARG_CHECK(scalar.group() == m_group, "Curve mismatch");
111 const auto& k = EC_Scalar_Data_PC::checked_ref(scalar).value();
112 auto& pcurve = m_group->pcurve();
113 auto pt = pcurve.point_to_affine(pcurve.mul(m_pt, k, rng));
114 return std::make_unique<EC_AffinePoint_Data_PC>(m_group, std::move(pt));
115}
BOTAN_ARG_CHECK
#define BOTAN_ARG_CHECK(expr, msg)
Definition assert.h:31
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:13
Botan::EC_Scalar_Data_PC::value
const auto & value() const
Definition ec_inner_pc.h:51

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 117 of file ec_inner_pc.cpp.

118 {
119 BOTAN_ARG_CHECK(scalar.group() == m_group, "Curve mismatch");
120 const auto& k = EC_Scalar_Data_PC::checked_ref(scalar).value();
121 return m_group->pcurve().mul_x_only(m_pt, k, rng);
122}

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 153 of file ec_inner_pc.cpp.

153 {
154 BOTAN_STATE_CHECK(!this->is_identity());
155 const size_t fe_bytes = this->field_element_bytes();
156 BOTAN_ARG_CHECK(bytes.size() == 1 + fe_bytes, "Invalid output size");
157 const bool y_is_odd = (m_xy.back() & 0x01) == 0x01;
158
159 BufferStuffer stuffer(bytes);
160 stuffer.append(y_is_odd ? 0x03 : 0x02);
161 this->serialize_x_to(stuffer.next(fe_bytes));
162}
BOTAN_STATE_CHECK
#define BOTAN_STATE_CHECK(expr)
Definition assert.h:43
Botan::EC_AffinePoint_Data_PC::is_identity
bool is_identity() const override
Definition ec_inner_pc.cpp:128
Botan::EC_AffinePoint_Data_PC::serialize_x_to
void serialize_x_to(std::span< uint8_t > bytes) const override
Definition ec_inner_pc.cpp:132

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 164 of file ec_inner_pc.cpp.

164 {
165 BOTAN_STATE_CHECK(!this->is_identity());
166 const size_t fe_bytes = this->field_element_bytes();
167 BOTAN_ARG_CHECK(bytes.size() == 1 + 2 * fe_bytes, "Invalid output size");
168 copy_mem(bytes, m_xy);
169}
Botan::copy_mem
constexpr void copy_mem(T *out, const T *in, size_t n)
Definition mem_ops.h:149

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 132 of file ec_inner_pc.cpp.

132 {
133 BOTAN_STATE_CHECK(!this->is_identity());
134 const size_t fe_bytes = this->field_element_bytes();
135 BOTAN_ARG_CHECK(bytes.size() == fe_bytes, "Invalid output size");
136 copy_mem(bytes, std::span{m_xy}.subspan(1, fe_bytes));
137}

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 146 of file ec_inner_pc.cpp.

146 {
147 BOTAN_STATE_CHECK(!this->is_identity());
148 const size_t fe_bytes = this->field_element_bytes();
149 BOTAN_ARG_CHECK(bytes.size() == 2 * fe_bytes, "Invalid output size");
150 copy_mem(bytes, std::span{m_xy}.last(2 * fe_bytes));
151}

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 139 of file ec_inner_pc.cpp.

139 {
140 BOTAN_STATE_CHECK(!this->is_identity());
141 const size_t fe_bytes = this->field_element_bytes();
142 BOTAN_ARG_CHECK(bytes.size() == fe_bytes, "Invalid output size");
143 copy_mem(bytes, std::span{m_xy}.subspan(1 + fe_bytes, fe_bytes));
144}

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 86 of file ec_inner_pc.h.

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