eddsa

Documentation

Index

• Variables
• func New(seed [32]byte, c twistededwards.CurveParams) (PrivateKey, PublicKey)
• func Verify(pubKey PublicKey, sig Signature, message curve.Element) (bool, error)
• type PrivateKey
• type PublicKey
• type Signature
  • func Sign(privateKey PrivateKey, publicKey PublicKey, message curve.Element) (Signature, error)

Variables

var ErrNotOnCurve = errors.New("point not on curve")

Functions

func New

func New(seed [32]byte, c twistededwards.CurveParams) (PrivateKey, PublicKey)

New creates an instance of eddsa

func Verify

func Verify(pubKey PublicKey, sig Signature, message curve.Element) (bool, error)

Verify verifies an eddsa signature cf https://en.wikipedia.org/wiki/EdDSA

Types

type PrivateKey

type PrivateKey struct {
	EdCurve *twistededwards.CurveParams
	// contains filtered or unexported fields
}

PrivateKey private key of an eddsa instance

type PublicKey

type PublicKey struct {
	A twistededwards.Point
}

PublicKey eddsa signature object cf https://en.wikipedia.org/wiki/EdDSA for notation

type Signature

type Signature struct {
	R       twistededwards.Point
	S       curve.Element // not in Montgomery form
	EdCurve *twistededwards.CurveParams
}

Signature represents an eddsa signature cf https://en.wikipedia.org/wiki/EdDSA for notation

func Sign

func Sign(privateKey PrivateKey, publicKey PublicKey, message curve.Element) (Signature, error)

Sign sign a message (in Montgomery form) cf https://en.wikipedia.org/wiki/EdDSA for the notations Eddsa is supposed to be built upon Edwards (or twisted Edwards) curves having 256 bits group size and cofactor=4 or 8