/*

 * Copyright (c) 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

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package sun.security.krb5.internal;

import sun.security.action.GetPropertyAction;

import sun.security.krb5.internal.rcache.AuthTimeWithHash;

import sun.security.krb5.internal.rcache.MemoryCache;

import sun.security.krb5.internal.rcache.DflCache;

import java.security.AccessController;

/**

 * Models the replay cache of an acceptor as described in

 * RFC 4120 3.2.3.

 * @since 1.8

 */

public abstract class ReplayCache {

    public static ReplayCache getInstance(String type) {

        if (type == null) {

            return new MemoryCache();

        } else if (type.equals("dfl") || type.startsWith("dfl:")) {

            return new DflCache(type);

        } else if (type.equals("none")) {

            return new ReplayCache() {

                @Override

                public void checkAndStore(KerberosTime currTime, AuthTimeWithHash time)

                        throws KrbApErrException {

                    // no check at all

                }

            };

        } else {

            throw new IllegalArgumentException("Unknown type: " + type);

        }

    }

    public static ReplayCache getInstance() {

        String type = AccessController.doPrivileged(

                new GetPropertyAction("sun.security.krb5.rcache"));

        return getInstance(type);

    }

    /**

     * Accepts or rejects an AuthTime.

     * @param currTime the current time

     * @param time AuthTimeWithHash object calculated from authenticator

     * @throws KrbApErrException if the authenticator is a replay

     */

    public abstract void checkAndStore(KerberosTime currTime, AuthTimeWithHash time)

            throws KrbApErrException;

}