/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Network Security Services for Java.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 2001
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

package org.mozilla.jss.provider.java.security;

import java.security.PublicKey;
import java.security.spec.*;
import org.mozilla.jss.crypto.InvalidKeyFormatException;
import org.mozilla.jss.crypto.PrivateKey;
import org.mozilla.jss.asn1.*;
import org.mozilla.jss.pkcs11.PK11PubKey;
import java.security.Key;
import java.security.InvalidKeyException;
import javax.crypto.spec.DHPublicKeySpec;

public class KeyFactorySpi1_4 extends KeyFactorySpi1_2
{

    protected PublicKey engineGeneratePublic(KeySpec keySpec)
        throws InvalidKeySpecException
    {
        if( keySpec instanceof DHPublicKeySpec ) {
            DHPublicKeySpec spec = (DHPublicKeySpec) keySpec;

            // Generate a DER DH public key
            INTEGER pubval = new INTEGER( spec.getY() );

            return PK11PubKey.fromRaw( PrivateKey.DiffieHellman,
                        ASN1Util.encode(pubval));
        } else {
            return super.engineGeneratePublic(keySpec);
        }
    }

}
