Java example source code file (ModuleSubject.java)

This example Java source code file (ModuleSubject.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

good, logincontext, loginexception, modulesubject, principal, samplelogin, security, securityexception

The ModuleSubject.java Java example source code

/*
 * Copyright (c) 2000, 2001, 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 4378100
 * @summary LoginContext doesn't reinit modules with new Subject
 *      if authentication fails
 *
 * @build ModuleSubject ModuleSubjectModule
 * @run main/othervm -Djava.security.auth.login.config=file:${test.src}/ModuleSubject.config ModuleSubject
 */

import javax.security.auth.*;
import javax.security.auth.login.*;
import java.security.Principal;

public class ModuleSubject {

    public static void main(String[] args) {

        LoginContext lc = null;
        try {
            lc = new LoginContext("SampleLogin");
        } catch (LoginException le) {
            System.out.println
                ("ModuleSubject test failed - login construction failed");
            throw new SecurityException(le.getMessage());
        }

        // first attempt must fail
        try {
            lc.login();
            throw new SecurityException
                ("ModuleSubject test failed: 1st login attempt did not fail!");
        } catch (LoginException le) {
            // good!
            System.out.println
                ("Good: first attempt failed");
            le.printStackTrace();
        }

        if (lc.getSubject() != null) {
            throw new SecurityException
                ("ModuleSubject test failed - " +
                "Subject after failed attempt not null: " +
                lc.getSubject().toString());
        }

        // second attempt succeeds, and the correct subject comes back
        try {
            lc.login();
            java.util.Set principals = lc.getSubject().getPrincipals();

            if (principals.size() != 1) {
                throw new SecurityException("ModuleSubject test failed: " +
                                        "corrupted subject");
            }
            java.util.Iterator i = principals.iterator();
            while (i.hasNext()) {
                Principal p = (Principal)i.next();
                System.out.println("principal after authentication = " +
                                p.toString());
            }
        } catch (LoginException le) {
            System.out.println
                ("ModuleSubject test failed - 2nd login attempt failed");
            throw new SecurityException(le.getMessage());
        }

        System.out.println("ModuleSubject test succeeded");
    }
}