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Java example source code file (Test.java)

This example Java source code file (Test.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

exception, good, inetaddress, nameservice, nameservicedescriptor, net, network, only, output, override, principalname, string, test, unknownhostexception

The Test.java Java example source code

/*
 * Copyright (c) 2009, 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 6682516
 * @summary SPNEGO_HTTP_AUTH/WWW_KRB and SPNEGO_HTTP_AUTH/WWW_SPNEGO failed on all non-windows platforms
 * @run main/othervm -Dsun.net.spi.nameservice.provider.1=ns,mock -Djava.security.krb5.conf=krb5.conf Test
 */

import java.net.InetAddress;
import java.net.UnknownHostException;
import sun.net.spi.nameservice.NameService;
import sun.net.spi.nameservice.NameServiceDescriptor;
import sun.security.krb5.PrincipalName;

public class Test implements NameServiceDescriptor {
    public static void main(String[] args) throws Exception {
        // This config file is generated using Kerberos.app on a Mac
        System.setProperty("java.security.krb5.realm", "THIS.REALM");
        System.setProperty("java.security.krb5.kdc", "localhost");

        // add using canonicalized name
        check("c1", "c1.this.domain");
        check("c1.this", "c1.this.domain");
        check("c1.this.domain", "c1.this.domain");

        // canonicalized name goes IP, reject
        check("c2", "c2");

        // canonicalized name goes strange, reject
        check("c3", "c3");

        // unsupported
        check("c4", "c4");
    }

    static void check(String input, String output) throws Exception {
        System.out.println(input + " -> " + output);
        PrincipalName pn = new PrincipalName("host/"+input,
                PrincipalName.KRB_NT_SRV_HST);
        if (!pn.getNameStrings()[1].equals(output)) {
            throw new Exception("Output is " + pn);
        }
    }

    @Override
    public NameService createNameService() throws Exception {
        NameService ns = new NameService() {
            @Override
            public InetAddress[] lookupAllHostAddr(String host)
                    throws UnknownHostException {
                // All c<n>.* goes to 127.0.0.n
                int i = Integer.valueOf(host.split("\\.")[0].substring(1));
                return new InetAddress[]{
                    InetAddress.getByAddress(host, new byte[]{127,0,0,(byte)i})
                };
            }
            @Override
            public String getHostByAddr(byte[] addr)
                    throws UnknownHostException {
                int i = addr[3];
                switch (i) {
                    case 1: return "c1.this.domain";        // Good
                    case 2: return "127.0.0.2";             // Only IP
                    case 3: return "d3.this.domain";        // name change
                    default:
                        throw new UnknownHostException();
                }
            }
        };
        return ns;
    }

    @Override
    public String getProviderName() {
        return "mock";
    }

    @Override
    public String getType() {
        return "ns";
    }
}

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