Java example source code file (CrossRealm.java)

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Java - Java tags/keywords

callbackhandler, crossrealm, exception, fileoutputstream, gssmanager, ioexception, kdc, namecallback, override, passwordcallback, security, unsupportedcallbackexception

The CrossRealm.java Java example source code

/*
 * Copyright (c) 2008, 2012, 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 6706974
 * @compile -XDignore.symbol.file CrossRealm.java
 * @run main/othervm CrossRealm
 * @summary Add krb5 test infrastructure
 */
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.security.Security;
import javax.security.auth.callback.Callback;
import javax.security.auth.callback.CallbackHandler;
import javax.security.auth.callback.NameCallback;
import javax.security.auth.callback.PasswordCallback;
import javax.security.auth.callback.UnsupportedCallbackException;
import org.ietf.jgss.GSSContext;
import org.ietf.jgss.GSSManager;
import org.ietf.jgss.GSSName;
import sun.security.jgss.GSSUtil;

public class CrossRealm implements CallbackHandler {
    public static void main(String[] args) throws Exception {
        startKDCs();
        xRealmAuth();
    }

    static void startKDCs() throws Exception {
        // Create and start the KDC
        KDC kdc1 = KDC.create("RABBIT.HOLE");
        kdc1.addPrincipal("dummy", "bogus".toCharArray());
        kdc1.addPrincipalRandKey("krbtgt/RABBIT.HOLE");
        kdc1.addPrincipal("krbtgt/SNAKE.HOLE@RABBIT.HOLE",
                "rabbit->snake".toCharArray());

        KDC kdc2 = KDC.create("SNAKE.HOLE");
        kdc2.addPrincipalRandKey("krbtgt/SNAKE.HOLE");
        kdc2.addPrincipal("krbtgt/SNAKE.HOLE@RABBIT.HOLE",
                "rabbit->snake".toCharArray());
        kdc2.addPrincipalRandKey("host/www.snake.hole");

        KDC.saveConfig("krb5-localkdc.conf", kdc1, kdc2,
                "forwardable=true",
                "[domain_realm]",
                ".snake.hole=SNAKE.HOLE");
        System.setProperty("java.security.krb5.conf", "krb5-localkdc.conf");
    }

    static void xRealmAuth() throws Exception {
        Security.setProperty("auth.login.defaultCallbackHandler", "CrossRealm");
        System.setProperty("java.security.auth.login.config", "jaas-localkdc.conf");
        System.setProperty("javax.security.auth.useSubjectCredsOnly", "false");
        FileOutputStream fos = new FileOutputStream("jaas-localkdc.conf");
        fos.write(("com.sun.security.jgss.krb5.initiate {\n" +
                "    com.sun.security.auth.module.Krb5LoginModule\n" +
                "    required\n" +
                "    principal=dummy\n" +
                "    doNotPrompt=false\n" +
                "    useTicketCache=false\n" +
                "    ;\n" +
                "};").getBytes());
        fos.close();

        GSSManager m = GSSManager.getInstance();
        m.createContext(
                m.createName("host@www.snake.hole", GSSName.NT_HOSTBASED_SERVICE),
                GSSUtil.GSS_KRB5_MECH_OID,
                null,
                GSSContext.DEFAULT_LIFETIME).initSecContext(new byte[0], 0, 0);
    }

    @Override
    public void handle(Callback[] callbacks) throws IOException, UnsupportedCallbackException {
        for (Callback callback : callbacks) {
            if (callback instanceof NameCallback) {
                ((NameCallback) callback).setName("dummy");
            }
            if (callback instanceof PasswordCallback) {
                ((PasswordCallback) callback).setPassword("bogus".toCharArray());
            }
        }
    }
}