001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.portal.security.lang;
016    
017    import com.liferay.portal.kernel.log.Log;
018    import com.liferay.portal.kernel.log.LogFactoryUtil;
019    import com.liferay.portal.kernel.util.ServiceLoader;
020    import com.liferay.portal.util.PropsValues;
021    
022    import java.util.List;
023    
024    /**
025     * @author Brian Wing Shun Chan
026     * @author Raymond Aug??
027     * @author Zsolt Berentey
028     */
029    public class SecurityManagerUtil {
030    
031            public static final boolean ENABLED = (System.getSecurityManager() != null);
032    
033            public static void destroy() {
034                    if (_portalSecurityManager == null) {
035                            return;
036                    }
037    
038                    _portalSecurityManager.destroy();
039    
040                    _portalSecurityManager = null;
041            }
042    
043            public static PortalSecurityManager getPortalSecurityManager() {
044                    return _portalSecurityManager;
045            }
046    
047            public static void init() {
048                    if (_portalSecurityManagerStrategy != null) {
049                            return;
050                    }
051    
052                    _portalSecurityManagerStrategy = PortalSecurityManagerStrategy.parse(
053                            PropsValues.PORTAL_SECURITY_MANAGER_STRATEGY);
054    
055                    if (_portalSecurityManagerStrategy ==
056                                    PortalSecurityManagerStrategy.LIFERAY) {
057    
058                            if (!ENABLED) {
059                                    _log.error(
060                                            "Plugin security management is not enabled. Enable a " +
061                                                    "security manager, then restart.");
062    
063                                    _portalSecurityManagerStrategy =
064                                            PortalSecurityManagerStrategy.DEFAULT;
065    
066                                    return;
067                            }
068    
069                            loadPortalSecurityManager();
070    
071                            if (_portalSecurityManager == null) {
072                                    _portalSecurityManagerStrategy =
073                                            PortalSecurityManagerStrategy.DEFAULT;
074    
075                                    if (_log.isInfoEnabled()) {
076                                            _log.info(
077                                                    "No portal security manager implementation was " +
078                                                            "located. Continuing with the default security " +
079                                                                    "strategy.");
080                                    }
081    
082                                    return;
083                            }
084                    }
085    
086                    if (_portalSecurityManagerStrategy ==
087                                    PortalSecurityManagerStrategy.LIFERAY) {
088    
089                            System.setSecurityManager((SecurityManager)_portalSecurityManager);
090                    }
091            }
092    
093            public static boolean isDefault() {
094                    init();
095    
096                    if (_portalSecurityManagerStrategy ==
097                                    PortalSecurityManagerStrategy.DEFAULT) {
098    
099                            return true;
100                    }
101    
102                    return false;
103            }
104    
105            public static boolean isLiferay() {
106                    init();
107    
108                    if (_portalSecurityManagerStrategy ==
109                                    PortalSecurityManagerStrategy.LIFERAY) {
110    
111                            return true;
112                    }
113    
114                    return false;
115            }
116    
117            private static void loadPortalSecurityManager() {
118                    try {
119                            List<PortalSecurityManager> portalSecurityManagers =
120                                    ServiceLoader.load(PortalSecurityManager.class);
121    
122                            if (portalSecurityManagers.isEmpty()) {
123                                    return;
124                            }
125    
126                            _portalSecurityManager = portalSecurityManagers.get(0);
127                    }
128                    catch (Exception e) {
129                            _log.error(e, e);
130                    }
131            }
132    
133            private static Log _log = LogFactoryUtil.getLog(SecurityManagerUtil.class);
134    
135            private static PortalSecurityManager _portalSecurityManager;
136            private static PortalSecurityManagerStrategy _portalSecurityManagerStrategy;
137    
138            private enum PortalSecurityManagerStrategy {
139    
140                    DEFAULT, LIFERAY;
141    
142                    public static PortalSecurityManagerStrategy parse(String value) {
143                            if (PropsValues.TCK_URL) {
144                                    return DEFAULT;
145                            }
146                            else if (value.equals("liferay")) {
147                                    return LIFERAY;
148                            }
149    
150                            return DEFAULT;
151                    }
152    
153            }
154    
155    }