ldappermissionmanagement.java

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/*
 * Copyright 2000-2001,2004 The Apache Software Foundation.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jetspeed.services.security.ldap;

import java.util.Enumeration;
import java.util.Iterator;
import java.util.Vector;
import javax.naming.directory.BasicAttributes;
import javax.servlet.ServletConfig;
import org.apache.jetspeed.om.security.Permission;
import org.apache.jetspeed.om.security.ldap.LDAPPermission;
import org.apache.jetspeed.om.security.ldap.LDAPRole;
import org.apache.jetspeed.services.JetspeedLDAP;
import org.apache.jetspeed.services.JetspeedSecurity;
import org.apache.jetspeed.services.ldap.LDAPURL;
import org.apache.jetspeed.services.rundata.JetspeedRunData;
import org.apache.jetspeed.services.rundata.JetspeedRunDataService;
import org.apache.jetspeed.services.security.JetspeedSecurityCache;
import org.apache.jetspeed.services.security.JetspeedSecurityException;
import org.apache.jetspeed.services.security.JetspeedSecurityService;
import org.apache.jetspeed.services.security.PermissionException;
import org.apache.jetspeed.services.security.PermissionManagement;
import org.apache.turbine.services.InitializationException;
import org.apache.turbine.services.TurbineBaseService;
import org.apache.turbine.services.TurbineServices;
import org.apache.turbine.services.resources.ResourceService;
import org.apache.turbine.services.rundata.RunDataService;

/**
 *
 * @author <a href="mailto:[e-mail]">Ender KILICOGLU</a>
 * @author <a href="mailto:[e-mail]">Sami Leino</a>
 *
 * @version $Id: LDAPPermissionManagement.java,v 1.6 2004/02/23 03:52:33 jford Exp $ 
 * 
 */
public class LDAPPermissionManagement  extends TurbineBaseService
                                   implements PermissionManagement
{
	// Constants
    private final static String CASCADE_DELETE          = "programmatic.cascade.delete";
    private final static String CACHING_ENABLE          = "caching.enable";
    private final static boolean DEFAULT_CASCADE_DELETE = true;
    private final static boolean DEFAULT_CACHING_ENABLE = true;
    private final static String[] ATTRS                 = { "ou", "uid", "permissionname" };

	// Instance variables
    private JetspeedRunDataService runDataService       = null;
    private boolean cascadeDelete                       = false;
    private boolean cachingEnable                       = false;

    ///////////////////////////////////////////////////////////////////////////
    // Permission Management Interfaces
    ///////////////////////////////////////////////////////////////////////////

    /**
     * Retrieves all <code>Permission</code>s for a given roleName principal.
     *
     * The security service may optionally check the current user context
     * to determine if the requestor has permission to perform this action.
     *
     * @param roleName a role name identity to be retrieved.
     * @return Iterator over all permissions associated to the role principal.
     * @exception PermissionException when the security provider has a general failure.
     * @exception InsufficientPrivilegeException when the requestor is denied due to insufficient privilege
     */
    public Iterator getPermissions(String roleName)
        throws JetspeedSecurityException
    {
        Vector perms = new Vector();
        BasicAttributes attr= new BasicAttributes();
        LDAPRole role;
        LDAPPermission permission;
        Vector userurls;

        try
        {
            if (cachingEnable)
            {
                Iterator iterator = JetspeedSecurityCache.getPermissions(roleName);
                if (iterator != null)
                {
                    return iterator;
                }
            }

            userurls = JetspeedLDAP.search(JetspeedLDAP.buildURL("ou=roles"),
                       "(&(uid=" + roleName + ")(objectclass=jetspeedrole))", ATTRS, true);

            if (userurls.size() > 0)
            {
                role = new LDAPRole((LDAPURL) ((Vector)userurls.elementAt(0)).firstElement());
                for (Enumeration enum= role.getRolePermissions().elements();enum.hasMoreElements();)
                {
                    permission = new LDAPPermission((String)enum.nextElement(), false);
                    perms.add(permission);
                }
            }
        }
        catch(Exception e)
        {
            throw new PermissionException("Failed to retrieve permissions ", e);
        }

        return perms.iterator();
    }

    /**
     * Retrieves all <code>Permission</code>s.
     *
     * The security service may optionally check the current user context
     * to determine if the requestor has permission to perform this action.
     *
     * @return Iterator over all permissions.
     * @exception PermissionException when the security provider has a general failure.
     * @exception InsufficientPrivilegeException when the requestor is denied due to insufficient privilege
     */
    public Iterator getPermissions()
        throws JetspeedSecurityException

    {
        BasicAttributes attr= new BasicAttributes();
        Vector permissions = new Vector();
        Vector permissionurls;
 
        try
        {
            permissionurls = JetspeedLDAP.search(JetspeedLDAP.buildURL("ou=permissions"),
                             "(objectclass=jetspeedpermission)", ATTRS, true);

            if (permissionurls.size() > 0)
            {
                for (Enumeration enum = permissionurls.elements();enum.hasMoreElements() ;)
                {
                    permissions.add(new LDAPPermission((LDAPURL) (((Vector)enum.nextElement()).firstElement())));
                }
            }
            else
            {
                throw new PermissionException("No permission ");
            }
        }
        catch(Exception e)
        {
            throw new PermissionException("Failed to retrieve permissions ", e);
        }
        return permissions.iterator();
    }

    /**
     * Adds a <code>Permission</code> into permanent storage.
     *
     * The security service may optionally check the current user context
     * to determine if the requestor has permission to perform this action.
     *
     * @exception PermissionException when the security provider has a general failure.
     * @exception InsufficientPrivilegeException when the requestor is denied due to insufficient privilege
     */
    public void addPermission(Permission permission)
        throws JetspeedSecurityException
    {
        if(permissionExists(permission.getName()))
        {
            throw new PermissionException("The permission '" +
                permission.getName() + "' already exists");
        }
        try
        {
            new LDAPPermission(permission.getName(), true).update(true);
        }
        catch(Exception e)
        {
            throw new PermissionException("Failed to create permission '" +
                permission.getName() + "'", e);
        }
    }


    /**
     * Saves a <code>Permission</code> into permanent storage.
     *
     * The security service may optionally check the current user context
     * to determine if the requestor has permission to perform this action.
     *
     * @exception PermissionException when the security provider has a general failure.
     * @exception InsufficientPrivilegeException when the requestor is denied due to insufficient privilege
     */
    public void savePermission(Permission permission)
        throws JetspeedSecurityException
    {
    }

    /**
     * Removes a <code>Permission</code> from the permanent store.
     *
     * The security service may optionally check the current user context
     * to determine if the requestor has permission to perform this action.
     *
     * @param permissionName the principal identity of the permission to be retrieved.
     * @exception PermissionException when the security provider has a general failure.
     * @exception InsufficientPrivilegeException when the requestor is denied due to insufficient privilege
     */
    public void removePermission(String permissionName)
        throws JetspeedSecurityException
    {
        try
        {
            LDAPPermission permission = new LDAPPermission(permissionName,false);
            JetspeedLDAP.deleteEntry(permission.getldapurl());

            if(cascadeDelete)
            {
            }

            if (cachingEnable)
            {
                JetspeedSecurityCache.removeAllPermissions(permissionName);
            }
        }
        catch(Exception e)
        {
            throw new PermissionException("Failed to remove permission '" +
                permissionName + "'", e);