func MarshalCompressed(curveCurve, x, y *big.Int) []byte

func UnmarshalCompressed(curveCurve, data []byte) (x, y *big.Int)

type Curve interface {// Params returns the parameters for the curve.Params() *CurveParams// IsOnCurve reports whether the given (x,y) lies on the curve.//// Deprecated: this is a low-level unsafe API. For ECDH, use the crypto/ecdh// package. The NewPublicKey methods of NIST curves in crypto/ecdh accept// the same encoding as the Unmarshal function, and perform on-curve checks.IsOnCurve(x, y *big.Int)bool// Add returns the sum of (x1,y1) and (x2,y2).//// Deprecated: this is a low-level unsafe API.Add(x1, y1, x2, y2 *big.Int) (x, y *big.Int)// Double returns 2*(x,y).//// Deprecated: this is a low-level unsafe API.Double(x1, y1 *big.Int) (x, y *big.Int)// ScalarMult returns k*(x,y) where k is an integer in big-endian form.//// Deprecated: this is a low-level unsafe API. For ECDH, use the crypto/ecdh// package. Most uses of ScalarMult can be replaced by a call to the ECDH// methods of NIST curves in crypto/ecdh.ScalarMult(x1, y1 *big.Int, k []byte) (x, y *big.Int)// ScalarBaseMult returns k*G, where G is the base point of the group// and k is an integer in big-endian form.//// Deprecated: this is a low-level unsafe API. For ECDH, use the crypto/ecdh// package. Most uses of ScalarBaseMult can be replaced by a call to the// PrivateKey.PublicKey method in crypto/ecdh.ScalarBaseMult(k []byte) (x, y *big.Int)}

funcP224¶

func P224()Curve

P224 returns aCurve which implements NIST P-224 (FIPS 186-3, section D.2.2),also known as secp224r1. The CurveParams.Name of thisCurve is "P-224".

Multiple invocations of this function will return the same value, so it canbe used for equality checks and switch statements.

The cryptographic operations are implemented using constant-time algorithms.

funcP256¶

func P256()Curve

P256 returns aCurve which implements NIST P-256 (FIPS 186-3, section D.2.3),also known as secp256r1 or prime256v1. The CurveParams.Name of thisCurve is"P-256".

Multiple invocations of this function will return the same value, so it canbe used for equality checks and switch statements.

The cryptographic operations are implemented using constant-time algorithms.

funcP384¶

func P384()Curve

P384 returns aCurve which implements NIST P-384 (FIPS 186-3, section D.2.4),also known as secp384r1. The CurveParams.Name of thisCurve is "P-384".

Multiple invocations of this function will return the same value, so it canbe used for equality checks and switch statements.

The cryptographic operations are implemented using constant-time algorithms.

funcP521¶

func P521()Curve

P521 returns aCurve which implements NIST P-521 (FIPS 186-3, section D.2.5),also known as secp521r1. The CurveParams.Name of thisCurve is "P-521".

Multiple invocations of this function will return the same value, so it canbe used for equality checks and switch statements.

The cryptographic operations are implemented using constant-time algorithms.

type CurveParams struct {P       *big.Int// the order of the underlying fieldN       *big.Int// the order of the base pointB       *big.Int// the constant of the curve equationGx, Gy  *big.Int// (x,y) of the base pointBitSizeint// the size of the underlying fieldNamestring// the canonical name of the curve}

func (*CurveParams)Params¶

func (curve *CurveParams) Params() *CurveParams