File	Doc	Category	Size	Date	Package
ECParameterSpec.java	API Doc	Java SE 5 API	2503	Fri Aug 26 14:57:18 BST 2005	java.security.spec

ECParameterSpec

• java.lang.Object

Fields Summary
private final EllipticCurve	curve
private final ECPoint	g
private final BigInteger	n
private final int	h

Constructors Summary

public ECParameterSpec(EllipticCurve curve, ECPoint g, BigInteger n, int h) Creates elliptic curve domain parameters based on the specified values. param curve the elliptic curve which this parameter defines. param g the generator which is also known as the base point. param n the order of the generator g. param h the cofactor. exception NullPointerException if curve, g, or n is null. exception IllegalArgumentException if n or h is not positive. if (curve == null) { throw new NullPointerException("curve is null"); } if (g == null) { throw new NullPointerException("g is null"); } if (n == null) { throw new NullPointerException("n is null"); } if (n.signum() != 1) { throw new IllegalArgumentException("n is not positive"); } if (h <= 0) { throw new IllegalArgumentException("h is not positive"); } this.curve = curve; this.g = g; this.n = n; this.h = h;

Methods Summary
public int	getCofactor() Returns the cofactor. return the cofactor. return h;
public java.security.spec.EllipticCurve	getCurve() Returns the elliptic curve that this parameter defines. return the elliptic curve that this parameter defines. return curve;
public java.security.spec.ECPoint	getGenerator() Returns the generator which is also known as the base point. return the generator which is also known as the base point. return g;
public java.math.BigInteger	getOrder() Returns the order of the generator. return the order of the generator. return n;