package org.bouncycastle.jce;
import java.util.Enumeration;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.cryptopro.ECGOST3410NamedCurves;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.jce.spec.ECNamedCurveParameterSpec;
/**
* a table of locally supported named curves.
*/
public class ECGOST3410NamedCurveTable
{
/**
* return a parameter spec representing the passed in named
* curve. The routine returns null if the curve is not present.
*
* @param name the name of the curve requested
* @return a parameter spec for the curve, null if it is not available.
*/
public static ECNamedCurveParameterSpec getParameterSpec(
String name)
{
ECDomainParameters ecP = ECGOST3410NamedCurves.getByName(name);
if (ecP == null)
{
try
{
ecP = ECGOST3410NamedCurves.getByOID(new ASN1ObjectIdentifier(name));
}
catch (IllegalArgumentException e)
{
return null; // not an oid.
}
}
if (ecP == null)
{
return null;
}
return new ECNamedCurveParameterSpec(
name,
ecP.getCurve(),
ecP.getG(),
ecP.getN(),
ecP.getH(),
ecP.getSeed());
}
/**
* return an enumeration of the names of the available curves.
*
* @return an enumeration of the names of the available curves.
*/
public static Enumeration getNames()
{
return ECGOST3410NamedCurves.getNames();
}
}