Added Authorization plugin

Added LDAPAuthorization plugin

plugins/LdapAuthorization/LdapAuthorizationPlugin.php

@@ -0,0 +1,129 @@
+<?php
+/**
+ * StatusNet, the distributed open-source microblogging tool
+ *
+ * Plugin to enable LDAP Authorization
+ *
+ * PHP version 5
+ *
+ * LICENCE: This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @category  Plugin
+ * @package   StatusNet
+ * @author    Craig Andrews <candrews@integralblue.com>
+ * @copyright 2009 Craig Andrews http://candrews.integralblue.com
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
+ * @link      http://status.net/
+ */
+
+if (!defined('STATUSNET') && !defined('LACONICA')) {
+    exit(1);
+}
+
+require_once INSTALLDIR.'/plugins/Authorization/AuthorizationPlugin.php';
+require_once 'Net/LDAP2.php';
+
+class LdapAuthorizationPlugin extends AuthorizationPlugin
+{
+    public $host=null;
+    public $port=null;
+    public $version=null;
+    public $starttls=null;
+    public $binddn=null;
+    public $bindpw=null;
+    public $basedn=null;
+    public $options=null;
+    public $filter=null;
+    public $scope=null;
+    public $provider_name = null;
+    public $uniqueMember_attribute = null;
+    public $roles_to_groups = null;
+
+    function onInitializePlugin(){
+        parent::onInitializePlugin();
+        if(!isset($this->host)){
+            throw new Exception("must specify a host");
+        }
+        if(!isset($this->basedn)){
+            throw new Exception("must specify a basedn");
+        }
+        if(!isset($this->provider_name)){
+            throw new Exception("provider_name must be set. Use the provider_name from the LDAP Authentication plugin.");
+        }
+        if(!isset($this->uniqueMember_attribute)){
+            throw new Exception("uniqueMember_attribute must be set.");
+        }
+        if(!isset($this->roles_to_groups)){
+            throw new Exception("roles_to_groups must be set.");
+        }
+    }
+
+    //---interface implementation---//
+    function loginAllowed($user) {
+        $user_username = new User_username();
+        $user_username->user_id=$user->id;
+        $user_username->provider_name=$this->provider_name;
+        if($user_username->find() && $user_username->fetch()){
+            $entry = $this->ldap_get_user($user_username->username);
+            if($entry){
+                //if a user exists, we can assume he's allowed to login
+                return true;
+            }else{
+                return null;
+            }
+        }else{
+            return null;
+        }
+    }
+
+    function hasRole($profile, $name) {
+        $user_username = new User_username();
+        $user_username->user_id=$profile->id;
+        $user_username->provider_name=$this->provider_name;
+        if($user_username->find() && $user_username->fetch()){
+            $entry = $this->ldap_get_user($user_username->username);
+            if($entry){
+                if(isset($this->roles_to_groups[$name])){
+                    if(is_array($this->roles_to_groups[$name])){
+                        foreach($this->roles_to_groups[$name] as $group){
+                            if($this->isMemberOfGroup($entry->dn(),$group)){
+                                return true;
+                            }
+                        }
+                    }else{
+                        if($this->isMemberOfGroup($entry->dn(),$this->roles_to_groups[$name])){
+                            return true;
+                        }
+                    }
+                }
+            }
+        }
+        return false;
+    }
+
+    function isMemberOfGroup($userDn, $groupDn)
+    {
+        $ldap = ldap_get_connection();
+        $link = $ldap->getLink();
+        $r = ldap_compare($link, $groupDn, $this->uniqueMember_attribute, $userDn);
+        if ($r === true){
+            return true;
+        }else if($r === false){
+            return false;
+        }else{
+            common_log(LOG_ERR, ldap_error($r));
+            return false;
+        }
+    }
+}