Package java.security.spec

Class ECParameterSpec

java.lang.Object

java.security.spec.ECParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

Direct Known Subclasses:

ECNamedCurveSpec

public class ECParameterSpec
extends Object
implements AlgorithmParameterSpec

The parameter specification used with Elliptic Curve Cryptography (ECC).

Constructor Summary

Constructors

Constructor	Description
ECParameterSpec(EllipticCurve curve, ECPoint generator, BigInteger order, int cofactor)	Creates a new ECParameterSpec with the specified elliptic curve, the base point, the order of the generator (or base point) and the co-factor.
ECParameterSpec(EllipticCurve curve, ECPoint generator, BigInteger order, int cofactor, String curveName)	Creates a new ECParameterSpec with the specified named curve and all of its parameters.

Method Summary

Modifier and Type	Method	Description
int	getCofactor()	Returns the cofactor.
EllipticCurve	getCurve()	Returns the elliptic curve.
String	getCurveName()	Returns the name of the curve if this is a named curve.
ECPoint	getGenerator()	Returns the generator (or base point).
BigInteger	getOrder()	Returns the order of the generator.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ECParameterSpec

public ECParameterSpec(EllipticCurve curve,
ECPoint generator,
BigInteger order,
int cofactor)

Creates a new ECParameterSpec with the specified elliptic curve, the base point, the order of the generator (or base point) and the co-factor.

Parameters:

curve - the elliptic curve.

generator - the generator (or base point).

order - the order of the generator.

cofactor - the co-factor.

Throws:

IllegalArgumentException - if order <= zero or cofactor <= zero.

ECParameterSpec

public ECParameterSpec(EllipticCurve curve,
ECPoint generator,
BigInteger order,
int cofactor,
String curveName)

Creates a new ECParameterSpec with the specified named curve and all of its parameters.

See Also:

ECParameterSpec(EllipticCurve, ECPoint, BigInteger, int)

Method Details

getCofactor

public int getCofactor()

Returns the cofactor.

Returns:

the cofactor.

getCurve

public EllipticCurve getCurve()

Returns the elliptic curve.

Returns:

the elliptic curve.

getGenerator

public ECPoint getGenerator()

Returns the generator (or base point).

Returns:

the generator (or base point).

getOrder

public BigInteger getOrder()

Returns the order of the generator.

Returns:

the order of the generator.

getCurveName

public String getCurveName()

Returns the name of the curve if this is a named curve. Returns null if this is not known to be a named curve.