Class NamedECParameterSpec

java.lang.Object

java.security.spec.ECParameterSpec

de.christofreichardt.json.webkey.NamedECParameterSpec

All Implemented Interfaces:

AlgorithmParameterSpec

public class NamedECParameterSpec
extends ECParameterSpec

Helper class needed to propagate the identifiers of this curve through serialization and deserialization.

Author:

Christof Reichardt

Constructor Summary

Constructors

Constructor	Description
NamedECParameterSpec(String name, EllipticCurve curve, ECPoint g, BigInteger n, int h)	Creates elliptic curve domain parameters based on the specified values.

Method Summary

Modifier and Type	Method	Description
String	toString()	Returns some identifier of the wrapped curve, e.g.

Methods inherited from class ECParameterSpec

getCofactor, getCurve, getGenerator, getOrder

Methods inherited from class Object

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

Constructor Details

NamedECParameterSpec

public NamedECParameterSpec(String name,
 EllipticCurve curve,
 ECPoint g,
 BigInteger n,
 int h)

Creates elliptic curve domain parameters based on the specified values.

Parameters:

name - contains some identifiers for the curve, e.g. "secp256r1 [NIST P-256,X9.62 prime256v1] (1.2.840.10045.3.1.7)"

curve - the elliptic curve which this parameter defines.

g - the generator which is also known as the base point.

n - the order of the generator g.

h - the cofactor.

Throws:

NullPointerException - if curve, g, or n is null.

IllegalArgumentException - if n or h is not positive.

Method Details

toString

public String toString()

Returns some identifier of the wrapped curve, e.g. "secp256r1 [NIST P-256,X9.62 prime256v1] (1.2.840.10045.3.1.7)"

Overrides:

toString in class Object

Returns:

the identifiers of the wrapped curve.