p256

package

v0.0.0-...-3948e75 Latest Latest Go to latest Published: Dec 15, 2020 License: BSD-3-Clause Imports: 4 Imported by: 0

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Repository

github.com/mmcloughlin/ec3

Links

Open Source Insights

Documentation ¶

Rendered for

Index ¶

Constants
func Add(z *Elt, x *Elt, y *Elt)
func CMov(y *Elt, x *Elt, c uint)
func Decode(z *Elt, x *Elt)
func Encode(z *Elt, x *Elt)
func Inv(z *Elt, x *Elt)
func Mul(z *Elt, x *Elt, y *Elt)
func Neg(z *Elt, x *Elt)
func Sqr(z *Elt, x *Elt)
func Sub(z *Elt, x *Elt, y *Elt)
type Affine
- func NewAffine(X, Y *big.Int) *Affine
- func (p *Affine) Coordinates() (X, Y *big.Int)
- func (a *Affine) Jacobian() (p *Jacobian)
- func (a *Affine) Projective() (p *Projective)
- func (p *Affine) Set(q *Affine)
type Curve
- func P256() Curve
type Elt
- func (x *Elt) Int() *big.Int
- func (x *Elt) IntRaw() *big.Int
- func (x *Elt) SetBytes(b []byte) *Elt
- func (x *Elt) SetBytesRaw(b []byte) *Elt
- func (x *Elt) SetInt(y *big.Int) *Elt
- func (x *Elt) SetInt64(y int64) *Elt
- func (x *Elt) SetInt64Raw(y int64) *Elt
- func (x *Elt) SetIntRaw(y *big.Int) *Elt
type Jacobian
- func NewJacobian(X, Y, Z *big.Int) *Jacobian
- func (p *Jacobian) Add(q *Jacobian, r *Jacobian)
- func (p *Jacobian) Affine() (a *Affine)
- func (p *Jacobian) CMov(q *Jacobian, c uint)
- func (p *Jacobian) CNeg(c uint)
- func (p *Jacobian) Coordinates() (X, Y, Z *big.Int)
- func (p *Jacobian) Double(q *Jacobian)
- func (p *Jacobian) Projective() (q *Projective)
- func (p *Jacobian) Set(q *Jacobian)
type Projective
- func NewProjective(X, Y, Z *big.Int) *Projective
- func (p *Projective) Affine() (a *Affine)
- func (p *Projective) CNeg(c uint)
- func (p *Projective) CompleteAdd(q *Projective, r *Projective)
- func (p *Projective) Coordinates() (X, Y, Z *big.Int)
- func (p *Projective) Set(q *Projective)

Constants ¶

View Source

const Size = 32

Size is the size of a field element in bytes.

Variables ¶

This section is empty.

Functions ¶

func Add ¶

func Add(z *Elt, x *Elt, y *Elt)

func CMov ¶

func CMov(y *Elt, x *Elt, c uint)

func Decode ¶

func Decode(z *Elt, x *Elt)

Decode decodes from the Montgomery domain.

func Encode ¶

func Encode(z *Elt, x *Elt)

Encode encodes into the Montgomery domain.

func Inv ¶

func Inv(z *Elt, x *Elt)

Inv computes z = 1/x (mod p).

func Mul ¶

func Mul(z *Elt, x *Elt, y *Elt)

func Neg ¶

func Neg(z *Elt, x *Elt)

Neg computes z = -x (mod p).

func Sqr ¶

func Sqr(z *Elt, x *Elt)

func Sub ¶

func Sub(z *Elt, x *Elt, y *Elt)

Types ¶

type Affine ¶

type Affine struct {
	X Elt
	Y Elt
}

func NewAffine ¶

func NewAffine(X, Y *big.Int) *Affine

func (*Affine) Coordinates ¶

func (p *Affine) Coordinates() (X, Y *big.Int)

func (*Affine) Jacobian ¶

func (a *Affine) Jacobian() (p *Jacobian)

func (*Affine) Projective ¶

func (a *Affine) Projective() (p *Projective)

func (*Affine) Set ¶

func (p *Affine) Set(q *Affine)

type Curve ¶

type Curve interface {
	elliptic.Curve

	// Inverse computes the inverse of k modulo the order N. Satisfies the
	// crypto/ecdsa.invertable interface.
	Inverse(k *big.Int) *big.Int
}

Curve extends the standard elliptic.Curve interface.

func P256 ¶

func P256() Curve

P256 returns a Curve which implements P-256.

type Elt ¶

type Elt [32]uint8

Elt is a field element.

func (*Elt) Int ¶

func (x *Elt) Int() *big.Int

Int converts to a big integer.

func (*Elt) IntRaw ¶

func (x *Elt) IntRaw() *big.Int

IntRaw converts to a big integer. This raw variant sets the value directly, bypassing any encoding/decoding steps.

func (*Elt) SetBytes ¶

func (x *Elt) SetBytes(b []byte) *Elt

SetBytes constructs a field element from bytes in big-endian order.

func (*Elt) SetBytesRaw ¶

func (x *Elt) SetBytesRaw(b []byte) *Elt

SetBytesRaw constructs a field element from bytes in big-endian order. This raw variant sets the value directly, bypassing any encoding/decoding steps.

func (*Elt) SetInt ¶

func (x *Elt) SetInt(y *big.Int) *Elt

SetInt constructs a field element from a big integer.

func (*Elt) SetInt64 ¶

func (x *Elt) SetInt64(y int64) *Elt

SetInt64 constructs a field element from an integer.

func (*Elt) SetInt64Raw ¶

func (x *Elt) SetInt64Raw(y int64) *Elt

SetInt64Raw constructs a field element from an integer. This raw variant sets the value directly, bypassing any encoding/decoding steps.

func (*Elt) SetIntRaw ¶

func (x *Elt) SetIntRaw(y *big.Int) *Elt

SetIntRaw constructs a field element from a big integer. This raw variant sets the value directly, bypassing any encoding/decoding steps.

type Jacobian ¶

type Jacobian struct {
	X Elt
	Y Elt
	Z Elt
}

func NewJacobian ¶

func NewJacobian(X, Y, Z *big.Int) *Jacobian

func (*Jacobian) Add ¶

func (p *Jacobian) Add(q *Jacobian, r *Jacobian)

func (*Jacobian) Affine ¶

func (p *Jacobian) Affine() (a *Affine)

func (*Jacobian) CMov ¶

func (p *Jacobian) CMov(q *Jacobian, c uint)

func (*Jacobian) CNeg ¶

func (p *Jacobian) CNeg(c uint)

func (*Jacobian) Coordinates ¶

func (p *Jacobian) Coordinates() (X, Y, Z *big.Int)

func (*Jacobian) Double ¶

func (p *Jacobian) Double(q *Jacobian)

func (*Jacobian) Projective ¶

func (p *Jacobian) Projective() (q *Projective)

func (*Jacobian) Set ¶

func (p *Jacobian) Set(q *Jacobian)

type Projective ¶

type Projective struct {
	X Elt
	Y Elt
	Z Elt
}

func NewProjective ¶

func NewProjective(X, Y, Z *big.Int) *Projective

func (*Projective) Affine ¶

func (p *Projective) Affine() (a *Affine)

func (*Projective) CNeg ¶

func (p *Projective) CNeg(c uint)

func (*Projective) CompleteAdd ¶

func (p *Projective) CompleteAdd(q *Projective, r *Projective)

func (*Projective) Coordinates ¶

func (p *Projective) Coordinates() (X, Y, Z *big.Int)

func (*Projective) Set ¶

func (p *Projective) Set(q *Projective)

Source Files ¶

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