/*

 * Copyright (c) 2016, 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 sun.security.provider;

import java.io.IOException;

import java.io.Serializable;

import java.security.DrbgParameters;

import java.security.SecureRandomParameters;

/**

 * Exported and non-exported parameters that can be used by DRBGs.

 */

public class MoreDrbgParameters implements SecureRandomParameters, Serializable {

    private static final long serialVersionUID = 9L;

    final transient EntropySource es;

    final String mech;

    final String algorithm;

    final boolean usedf;

    final int strength;

    final DrbgParameters.Capability capability;

    // The following 2 fields will be reassigned in readObject and

    // thus cannot be final

    byte[] nonce;

    byte[] personalizationString;

    /**

     * Creates a new {@code MoreDrbgParameters} object.

     *

     * @param es the {@link EntropySource} to use. If set to {@code null},

     *           a default entropy source will be used.

     * @param mech mech name. If set to {@code null}, the one in

     *             securerandom.drbg.config is used. This argument is ignored

     *             when passing to HashDrbg/HmacDrbg/CtrDrbg.

     * @param algorithm the requested algorithm to use. If set to {@code null},

     *                  the algorithm will be decided by strength.

     * @param nonce the nonce to use. If set to {@code null},

     *              a nonce will be assigned.

     * @param usedf whether a derivation function should be used

     * @param config a {@link DrbgParameters.Instantiation} object

     */

    public MoreDrbgParameters(EntropySource es, String mech,

                              String algorithm, byte[] nonce, boolean usedf,

                              DrbgParameters.Instantiation config) {

        this.mech = mech;

        this.algorithm = algorithm;

        this.es = es;

        this.nonce = (nonce == null) ? null : nonce.clone();

        this.usedf = usedf;

        this.strength = config.getStrength();

        this.capability = config.getCapability();

        this.personalizationString = config.getPersonalizationString();

    }

    @Override

    public String toString() {

        return mech + "," + algorithm + "," + usedf + "," + strength

                + "," + capability + "," + personalizationString;

    }

    private void readObject(java.io.ObjectInputStream s)

            throws IOException, ClassNotFoundException {

        s.defaultReadObject();

        if (nonce != null) {

            nonce = nonce.clone();

        }

        if (personalizationString != null) {

            personalizationString = personalizationString.clone();

        }

        if (capability == null) {

            throw new IllegalArgumentException("Input data is corrupted");

        }

    }

}