/*

 * 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.

 *

 * 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.

*/

/*

 * @test

 * @bug 8001326

 * @run main/othervm ReplayCacheExpunge 16

 * @run main/othervm/fail ReplayCacheExpunge 15

 * @summary when number of expired entries minus number of good entries

 * is more than 30, expunge occurs, and expired entries are forgotten.

*/

import java.util.Random;

import sun.security.krb5.internal.KerberosTime;

import sun.security.krb5.internal.ReplayCache;

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

public class ReplayCacheExpunge {

    static final String client = "dummy@REALM";

    static final String server = "server/localhost@REALM";

    static final Random rand = new Random();

    public static void main(String[] args) throws Exception {

        int count = Integer.parseInt(args[0]);

        ReplayCache cache = ReplayCache.getInstance("dfl:./");

        AuthTimeWithHash a1 =

                new AuthTimeWithHash(client, server, time(-400), 0, hash("1"));

        AuthTimeWithHash a2 =

                new AuthTimeWithHash(client, server, time(0), 0, hash("4"));

        KerberosTime now = new KerberosTime(time(0)*1000L);

        KerberosTime then = new KerberosTime(time(-300)*1000L);

        // Once upon a time, we added a lot of events

        for (int i=0; i<count; i++) {

            a1 = new AuthTimeWithHash(client, server, time(-400), 0, hash(""));

            cache.checkAndStore(then, a1);

        }

        // Now, we add a new one. If some conditions hold, the old ones

        // will be expunged.

        cache.checkAndStore(now, a2);

        // and adding an old one will not trigger any error

        cache.checkAndStore(now, a1);

    }

    private static String hash(String s) {

        char[] data = new char[16];

        for (int i=0; i<16; i++) {

            if (i < s.length()) data[i] = s.charAt(i);

            else data[i] = (char)('0' + rand.nextInt(10));

        }

        return new String(data);

    }

    private static int time(int x) {

        return (int)(System.currentTimeMillis()/1000) + x;

    }

}