dhutil.java

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// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
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// Source File Name:   DHUtil.java

package org.bouncycastle.jce.provider;

import java.security.*;
import javax.crypto.interfaces.DHPrivateKey;
import javax.crypto.interfaces.DHPublicKey;
import javax.crypto.spec.DHParameterSpec;
import org.bouncycastle.crypto.params.*;

public class DHUtil
{

	public DHUtil()
	{
	}

	public static AsymmetricKeyParameter generatePublicKeyParameter(PublicKey key)
		throws InvalidKeyException
	{
		if (key instanceof DHPublicKey)
		{
			DHPublicKey k = (DHPublicKey)key;
			return new DHPublicKeyParameters(k.getY(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL()));
		} else
		{
			throw new InvalidKeyException("can't identify DH public key.");
		}
	}

	public static AsymmetricKeyParameter generatePrivateKeyParameter(PrivateKey key)
		throws InvalidKeyException
	{
		if (key instanceof DHPrivateKey)
		{
			DHPrivateKey k = (DHPrivateKey)key;
			return new DHPrivateKeyParameters(k.getX(), new DHParameters(k.getParams().getP(), k.getParams().getG(), null, k.getParams().getL()));
		} else
		{
			throw new InvalidKeyException("can't identify DH private key.");
		}
	}
}