jdk/test/jdk/sun/security/krb5/auto/UserIterCount.java

/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 8370615
 * @summary Improve Kerberos credentialing
 * @library /test/lib
 * @compile -XDignore.symbol.file UserIterCount.java
 * @run main jdk.test.lib.FileInstaller TestHosts TestHosts
 * @run main/othervm -Djdk.net.hosts.file=TestHosts UserIterCount
 */

import java.util.HashMap;

import sun.security.krb5.EncryptionKey;
import sun.security.krb5.KrbException;
import sun.security.krb5.PrincipalName;

public class UserIterCount {

    static class MyKDC extends OneKDC {
        static final HashMap<String, EncryptionKey> CACHE
                = new HashMap<>();

        public MyKDC() throws Exception {
            super(null);
        }

        @Override
        protected byte[] getParams(PrincipalName p, int etype) {
            if (etype == 18) {
                if (p.toString().startsWith(OneKDC.USER)) {
                    return new byte[]{0, 0, 16, 01};
                } else {
                    return new byte[]{0, 79, (byte)255, (byte)255};
                }
            } else {
                return super.getParams(p, etype);
            }
        }

        @Override
        EncryptionKey keyForUser(PrincipalName p, int etype, boolean server)
                throws KrbException {
            var key = p.toString() + etype + server;
            var v = CACHE.get(key);
            if (v == null) {
                v = super.keyForUser(p, etype, server);
                CACHE.put(key, v);
            }
            return v;
        }
    }

    public static void main(String[] args) throws Exception {
        new MyKDC().writeJAASConf();
        Context.fromUserPass(OneKDC.USER, OneKDC.PASS, false);
        Context.fromUserPass(OneKDC.USER2, OneKDC.PASS2, false);
    }
}