/*

 * Copyright 1999-2004 Sun Microsystems, Inc.  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.  Sun designates this

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

 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.com if you need additional information or

 * have any questions.

 */

package javax.net.ssl;

import java.security.KeyManagementException;

import java.security.PrivateKey;

import java.security.Principal;

import java.security.cert.X509Certificate;

import java.net.Socket;

/**

 * Instances of this interface manage which X509 certificate-based

 * key pairs are used to authenticate the local side of a secure

 * socket.

 * <P>

 * During secure socket negotiations, implentations

 * call methods in this interface to:

 * <UL>

 * <LI> determine the set of aliases that are available for negotiations

 *      based on the criteria presented,

 * <LI> select the <ITALIC> best alias </ITALIC> based on

 *      the criteria presented, and

 * <LI> obtain the corresponding key material for given aliases.

 * </UL>

 * <P>

 * Note: the X509ExtendedKeyManager should be used in favor of this

 * class.

 *

 * @since 1.4

 */

public interface X509KeyManager extends KeyManager {

    /**

     * Get the matching aliases for authenticating the client side of a secure

     * socket given the public key type and the list of

     * certificate issuer authorities recognized by the peer (if any).

     *

     * @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.

     * @return an array of the matching alias names, or null if there

     *          were no matches.

     */

    public String[] getClientAliases(String keyType, Principal[] issuers);

    /**

     * Choose an alias to authenticate the client side of a secure

     * socket given the public key type and the list of

     * certificate issuer authorities recognized by the peer (if any).

     *

     * @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 socket the socket to be used for this connection.  This

     *          parameter can be null, which indicates that

     *          implementations are free to select an alias applicable

     *          to any socket.

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

     *          are no matches.

     */

    public String chooseClientAlias(String[] keyType, Principal[] issuers,

        Socket socket);

    /**

     * Get the matching aliases for authenticating the server side of a secure

     * socket given the public key type and the list of

     * certificate issuer authorities recognized by the peer (if any).

     *

     * @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.

     * @return an array of the matching alias names, or null

     *          if there were no matches.

     */

    public String[] getServerAliases(String keyType, Principal[] issuers);

    /**

     * Choose an alias to authenticate the server side of a secure

     * socket given the public key type and the list of

     * certificate issuer authorities recognized by the peer (if any).

     *

     * @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 socket the socket to be used for this connection.  This

     *          parameter can be null, which indicates that

     *          implementations are free to select an alias applicable

     *          to any socket.

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

     *          are no matches.

     */

    public String chooseServerAlias(String keyType, Principal[] issuers,

        Socket socket);

    /**

     * Returns the certificate chain associated with the given alias.

     *

     * @param alias the alias name

     * @return the certificate chain (ordered with the user's certificate first

     *          and the root certificate authority last), or null

     *          if the alias can't be found.

     */

    public X509Certificate[] getCertificateChain(String alias);

    /**

     * Returns the key associated with the given alias.

     *

     * @param alias the alias name

     * @return the requested key, or null if the alias can't be found.

     */

    public PrivateKey getPrivateKey(String alias);

}