ecutil.java

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// Decompiled by Jad v1.5.8e2. Copyright 2001 Pavel Kouznetsov.
// Jad home page: http://kpdus.tripod.com/jad.html
// Decompiler options: packimports(3) fieldsfirst ansi space 
// Source File Name:   ECUtil.java

package org.bouncycastle.jce.provider;

import java.security.*;
import org.bouncycastle.crypto.params.*;
import org.bouncycastle.jce.interfaces.ECPrivateKey;
import org.bouncycastle.jce.interfaces.ECPublicKey;
import org.bouncycastle.jce.spec.ECParameterSpec;

public class ECUtil
{

	public ECUtil()
	{
	}

	public static AsymmetricKeyParameter generatePublicKeyParameter(PublicKey key)
		throws InvalidKeyException
	{
		if (key instanceof ECPublicKey)
		{
			ECPublicKey k = (ECPublicKey)key;
			ECParameterSpec s = k.getParams();
			return new ECPublicKeyParameters(k.getQ(), new ECDomainParameters(s.getCurve(), s.getG(), s.getN()));
		} else
		{
			throw new InvalidKeyException("can't identify EC public key.");
		}
	}

	public static AsymmetricKeyParameter generatePrivateKeyParameter(PrivateKey key)
		throws InvalidKeyException
	{
		if (key instanceof ECPrivateKey)
		{
			ECPrivateKey k = (ECPrivateKey)key;
			ECParameterSpec s = k.getParams();
			return new ECPrivateKeyParameters(k.getD(), new ECDomainParameters(s.getCurve(), s.getG(), s.getN()));
		} else
		{
			throw new InvalidKeyException("can't identify EC private key.");
		}
	}
}