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package org.spongycastle.jce.spec;
import org.spongycastle.math.ec.ECCurve;
import org.spongycastle.math.ec.ECPoint;
import java.math.BigInteger;
import java.security.spec.AlgorithmParameterSpec;
/**
* basic domain parameters for an Elliptic Curve public or private key.
*/
public class ECParameterSpec
implements AlgorithmParameterSpec
{
private ECCurve curve;
private byte[] seed;
private ECPoint G;
private BigInteger n;
private BigInteger h;
public ECParameterSpec(
ECCurve curve,
ECPoint G,
BigInteger n)
{
this.curve = curve;
this.G = G.normalize();
this.n = n;
this.h = BigInteger.valueOf(1);
this.seed = null;
}
public ECParameterSpec(
ECCurve curve,
ECPoint G,
BigInteger n,
BigInteger h)
{
this.curve = curve;
this.G = G.normalize();
this.n = n;
this.h = h;
this.seed = null;
}
public ECParameterSpec(
ECCurve curve,
ECPoint G,
BigInteger n,
BigInteger h,
byte[] seed)
{
this.curve = curve;
this.G = G.normalize();
this.n = n;
this.h = h;
this.seed = seed;
}
/**
* return the curve along which the base point lies.
* @return the curve
*/
public ECCurve getCurve()
{
return curve;
}
/**
* return the base point we are using for these domain parameters.
* @return the base point.
*/
public ECPoint getG()
{
return G;
}
/**
* return the order N of G
* @return the order
*/
public BigInteger getN()
{
return n;
}
/**
* return the cofactor H to the order of G.
* @return the cofactor
*/
public BigInteger getH()
{
return h;
}
/**
* return the seed used to generate this curve (if available).
* @return the random seed
*/
public byte[] getSeed()
{
return seed;
}
public boolean equals(Object o)
{
if (!(o instanceof ECParameterSpec))
{
return false;
}
ECParameterSpec other = (ECParameterSpec)o;
return this.getCurve().equals(other.getCurve()) && this.getG().equals(other.getG());
}
public int hashCode()
{
return this.getCurve().hashCode() ^ this.getG().hashCode();
}
}
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