Java example source code file (WildcardPrincipalName.java)

This example Java source code file (WildcardPrincipalName.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

checkpermissionaction, cn\=duke, exception, hashset, override, privilegedaction, propertypermission, runasprivilegeduseraction, security, subject, util, void, wildcardprincipalname, x500principal

The WildcardPrincipalName.java Java example source code

/*
 * Copyright (c) 2013, 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 8008908
 * @summary wildcard principal names are not processed correctly
 * @run main/othervm/policy=wildcard.policy WildcardPrincipalName
 */

import java.security.AccessController;
import java.security.Permission;
import java.security.Principal;
import java.security.PrivilegedAction;
import java.util.HashSet;
import java.util.PropertyPermission;
import java.util.Set;
import javax.security.auth.Subject;
import javax.security.auth.x500.X500Principal;

public class WildcardPrincipalName {

    public static void main(String[] args) throws Exception {

        X500Principal duke = new X500Principal("CN=Duke");
        PropertyPermission pp = new PropertyPermission("user.home", "read");
        RunAsPrivilegedUserAction runAsPrivilegedUserAction
            = new RunAsPrivilegedUserAction(duke,
                                            new CheckPermissionAction(pp));
        AccessController.doPrivileged(runAsPrivilegedUserAction);
        System.out.println("test PASSED");
    }

    private static class RunAsPrivilegedUserAction
        implements PrivilegedAction<Void> {
        private final PrivilegedAction<Void> action;
        private final Principal principal;

        RunAsPrivilegedUserAction(Principal principal,
                                  PrivilegedAction<Void> action) {
            this.principal = principal;
            this.action = action;
        }

        @Override public Void run() {
            Set<Principal> principals = new HashSet<>();
            Set<Object> publicCredentials = new HashSet<>();
            Set<Object> privateCredentials = new HashSet<>();

            principals.add(principal);
            Subject subject = new Subject(true,
                                          principals,
                                          publicCredentials,
                                          privateCredentials);

            Subject.doAsPrivileged(subject, action, null);
            return null;
        }
    }

    private static class CheckPermissionAction
        implements PrivilegedAction<Void> {
        private final Permission permission;

        CheckPermissionAction(Permission permission) {
            this.permission = permission;
        }

        @Override public Void run() {
            AccessController.checkPermission(permission);
            return null;
        }
    }
}