package org.bouncycastle.jcajce.provider.asymmetric.gost;
import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import org.bouncycastle.crypto.generators.GOST3410ParametersGenerator;
import org.bouncycastle.crypto.params.GOST3410Parameters;
import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.bouncycastle.jce.spec.GOST3410ParameterSpec;
import org.bouncycastle.jce.spec.GOST3410PublicKeyParameterSetSpec;
public abstract class AlgorithmParameterGeneratorSpi
extends java.security.AlgorithmParameterGeneratorSpi
{
protected SecureRandom random;
protected int strength = 1024;
protected void engineInit(
int strength,
SecureRandom random)
{
this.strength = strength;
this.random = random;
}
protected void engineInit(
AlgorithmParameterSpec genParamSpec,
SecureRandom random)
throws InvalidAlgorithmParameterException
{
throw new InvalidAlgorithmParameterException("No supported AlgorithmParameterSpec for GOST3410 parameter generation.");
}
protected AlgorithmParameters engineGenerateParameters()
{
GOST3410ParametersGenerator pGen = new GOST3410ParametersGenerator();
if (random != null)
{
pGen.init(strength, 2, random);
}
else
{
pGen.init(strength, 2, new SecureRandom());
}
GOST3410Parameters p = pGen.generateParameters();
AlgorithmParameters params;
try
{
params = AlgorithmParameters.getInstance("GOST3410", BouncyCastleProvider.PROVIDER_NAME);
params.init(new GOST3410ParameterSpec(new GOST3410PublicKeyParameterSetSpec(p.getP(), p.getQ(), p.getA())));
}
catch (Exception e)
{
throw new RuntimeException(e.getMessage());
}
return params;
}
}