twistededwards

Documentation

Index

• type CurveParams
  • func GetEdwardsCurve() CurveParams
• type Point
  • func NewPoint(x, y fr.Element) Point
  • func (p *Point) Add(p1, p2 *Point, ecurve CurveParams) *Point
  • func (p *Point) Double(p1 *Point, ecurve CurveParams) *Point
  • func (p *Point) IsOnCurve(ecurve CurveParams) bool
  • func (p *Point) ScalarMul(p1 *Point, ecurve CurveParams, scalar fr.Element) *Point

Types

type CurveParams

type CurveParams struct {
	A, D     fr.Element // in Montgomery form
	Cofactor fr.Element // not in Montgomery form
	Order    big.Int
	Base     Point
}

CurveParams curve parameters: ax^2 + y^2 = 1 + d*x^2*y^2

func GetEdwardsCurve

func GetEdwardsCurve() CurveParams

GetEdwardsCurve returns the twisted Edwards curve on BLS381's Fr

type Point

type Point struct {
	X, Y fr.Element
}

Point point on a twisted Edwards curve

func NewPoint

func NewPoint(x, y fr.Element) Point

NewPoint creates a new instance of Point

func (*Point) Add

func (p *Point) Add(p1, p2 *Point, ecurve CurveParams) *Point

Add adds two points (x,y), (u,v) on a twisted Edwards curve with parameters a, d modifies p

func (*Point) Double

func (p *Point) Double(p1 *Point, ecurve CurveParams) *Point

Double doubles point (x,y) on a twisted Edwards curve with parameters a, d modifies p

func (*Point) IsOnCurve

func (p *Point) IsOnCurve(ecurve CurveParams) bool

IsOnCurve checks if a point is on the twisted Edwards curve

func (*Point) ScalarMul

func (p *Point) ScalarMul(p1 *Point, ecurve CurveParams, scalar fr.Element) *Point

ScalarMul scalar multiplication of a point p1 points on the twisted Edwards curve c parameters of the twisted Edwards curve scal scalar NOT in Montgomery form modifies p