/*

 * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

package java.security.spec;

import java.math.BigInteger;

/**

 * This immutable class specifies an elliptic curve private key with

 * its associated parameters.

 *

 * @see KeySpec

 * @see ECParameterSpec

 *

 * @author Valerie Peng

 *

 * @since 1.5

 */

public class ECPrivateKeySpec implements KeySpec {

    private BigInteger s;

    private ECParameterSpec params;

    /**

     * Creates a new ECPrivateKeySpec with the specified

     * parameter values.

     * @param s the private value.

     * @param params the associated elliptic curve domain

     * parameters.

     * @exception NullPointerException if {@code s}

     * or {@code params} is null.

     */

    public ECPrivateKeySpec(BigInteger s, ECParameterSpec params) {

        if (s == null) {

            throw new NullPointerException("s is null");

        }

        if (params == null) {

            throw new NullPointerException("params is null");

        }

        this.s = s;

        this.params = params;

    }

    /**

     * Returns the private value S.

     * @return the private value S.

     */

    public BigInteger getS() {

        return s;

    }

    /**

     * Returns the associated elliptic curve domain

     * parameters.

     * @return the EC domain parameters.

     */

    public ECParameterSpec getParams() {

        return params;

    }

}