package org.bouncycastle.jcajce.provider.asymmetric.util;
import java.security.InvalidKeyException;
import java.security.PrivateKey;
import java.security.PublicKey;
import org.bouncycastle.crypto.params.AsymmetricKeyParameter;
import org.bouncycastle.crypto.params.GOST3410Parameters;
import org.bouncycastle.crypto.params.GOST3410PrivateKeyParameters;
import org.bouncycastle.crypto.params.GOST3410PublicKeyParameters;
import org.bouncycastle.jce.interfaces.GOST3410PrivateKey;
import org.bouncycastle.jce.interfaces.GOST3410PublicKey;
import org.bouncycastle.jce.spec.GOST3410PublicKeyParameterSetSpec;
/**
* utility class for converting jce/jca GOST3410-94 objects
* objects into their org.bouncycastle.crypto counterparts.
*/
public class GOST3410Util
{
static public AsymmetricKeyParameter generatePublicKeyParameter(
PublicKey key)
throws InvalidKeyException
{
if (key instanceof GOST3410PublicKey)
{
GOST3410PublicKey k = (GOST3410PublicKey)key;
GOST3410PublicKeyParameterSetSpec p = k.getParameters().getPublicKeyParameters();
return new GOST3410PublicKeyParameters(k.getY(),
new GOST3410Parameters(p.getP(), p.getQ(), p.getA()));
}
throw new InvalidKeyException("can't identify GOST3410 public key: " + key.getClass().getName());
}
static public AsymmetricKeyParameter generatePrivateKeyParameter(
PrivateKey key)
throws InvalidKeyException
{
if (key instanceof GOST3410PrivateKey)
{
GOST3410PrivateKey k = (GOST3410PrivateKey)key;
GOST3410PublicKeyParameterSetSpec p = k.getParameters().getPublicKeyParameters();
return new GOST3410PrivateKeyParameters(k.getX(),
new GOST3410Parameters(p.getP(), p.getQ(), p.getA()));
}
throw new InvalidKeyException("can't identify GOST3410 private key.");
}
}