/*

 * Copyright (c) 2004, 2018, 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

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 */

package javax.net.ssl;

import java.security.Principal;

/**

 * Abstract class that provides for extension of the X509KeyManager

 * interface.

 * <P>

 * Methods in this class should be overridden to provide actual

 * implementations.

 *

 * @since 1.5

 * @author Brad R. Wetmore

 */

public abstract class X509ExtendedKeyManager implements X509KeyManager {

    /**

     * Constructor used by subclasses only.

     */

    protected X509ExtendedKeyManager() {

    }

    /**

     * Choose an alias to authenticate the client side of an

     * <code>SSLEngine</code> connection given the public key type

     * and the list of certificate issuer authorities recognized by

     * the peer (if any).

     * <P>

     * The default implementation returns null.

     *

     * @param keyType the key algorithm type name(s), ordered

     *          with the most-preferred key type first.

     * @param issuers the list of acceptable CA issuer subject names

     *          or null if it does not matter which issuers are used.

     * @param engine the <code>SSLEngine</code> to be used for this

     *          connection.  This parameter can be null, which indicates

     *          that implementations of this interface are free to

     *          select an alias applicable to any engine.

     * @return the alias name for the desired key, or null if there

     *          are no matches.

     */

    public String chooseEngineClientAlias(String[] keyType,

            Principal[] issuers, SSLEngine engine) {

        return null;

    }

    /**

     * Choose an alias to authenticate the server side of an

     * <code>SSLEngine</code> connection given the public key type

     * and the list of certificate issuer authorities recognized by

     * the peer (if any).

     * <P>

     * The default implementation returns null.

     *

     * @param keyType the key algorithm type name.

     * @param issuers the list of acceptable CA issuer subject names

     *          or null if it does not matter which issuers are used.

     * @param engine the <code>SSLEngine</code> to be used for this

     *          connection.  This parameter can be null, which indicates

     *          that implementations of this interface are free to

     *          select an alias applicable to any engine.

     * @return the alias name for the desired key, or null if there

     *          are no matches.

     */

    public String chooseEngineServerAlias(String keyType,

            Principal[] issuers, SSLEngine engine) {

        return null;

    }

}