import sun.security.krb5.internal.rcache.AuthTimeWithHash; //导入依赖的package包/类
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);
    }
}
 

import sun.security.krb5.internal.rcache.AuthTimeWithHash; //导入依赖的package包/类
public static void main(String[] args) throws Exception {

        AuthTimeWithHash a1 = new AuthTimeWithHash(client, server, time(0), 0,
                "1111111111111111");
        AuthTimeWithHash a2 = new AuthTimeWithHash(client, server, time(0), 0,
                "2222222222222222");
        KerberosTime now = new KerberosTime(time(0)*1000L);

        // When all new styles, must exact match
        ReplayCache cache = ReplayCache.getInstance("dfl:./c1");
        cache.checkAndStore(now, a1);
        cache.checkAndStore(now, a2);

        // When only old style in cache, partial match
        cache = ReplayCache.getInstance("dfl:./c2");
        cache.checkAndStore(now, a1);
        // A small surgery to remove the new style from the cache file
        SeekableByteChannel ch = Files.newByteChannel(Paths.get("c2"),
                StandardOpenOption.WRITE,
                StandardOpenOption.READ);
        ch.position(6);
        ch.write(ByteBuffer.wrap(a1.encode(false)));
        ch.truncate(ch.position());
        ch.close();
        try {
            cache.checkAndStore(now, a2);
            throw new Exception();
        } catch (KrbException ke) {
            // Correct
            System.out.println(ke);
        }
    }
 

import sun.security.krb5.internal.rcache.AuthTimeWithHash; //导入依赖的package包/类
public static void main(String[] args) throws Exception {

        AuthTimeWithHash a1 = new AuthTimeWithHash(client, server, time(0), 0,
                "HASH", "1111111111111111");
        AuthTimeWithHash a2 = new AuthTimeWithHash(client, server, time(0), 0,
                "HASH", "2222222222222222");
        KerberosTime now = new KerberosTime(time(0)*1000L);

        // When all new styles, must exact match
        ReplayCache cache = ReplayCache.getInstance("dfl:./c1");
        cache.checkAndStore(now, a1);
        cache.checkAndStore(now, a2);

        // When only old style in cache, partial match
        cache = ReplayCache.getInstance("dfl:./c2");
        cache.checkAndStore(now, a1);
        // A small surgery to remove the new style from the cache file
        SeekableByteChannel ch = Files.newByteChannel(Paths.get("c2"),
                StandardOpenOption.WRITE,
                StandardOpenOption.READ);
        ch.position(6);
        ch.write(ByteBuffer.wrap(a1.encode(false)));
        ch.truncate(ch.position());
        ch.close();
        try {
            cache.checkAndStore(now, a2);
            throw new Exception();
        } catch (KrbException ke) {
            // Correct
            System.out.println(ke);
        }
    }
 

import sun.security.krb5.internal.rcache.AuthTimeWithHash; //导入依赖的package包/类
/**
 * 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;