forked from GNUsocial/gnu-social
221 lines
7.8 KiB
PHP
221 lines
7.8 KiB
PHP
<?php
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/**
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* StatusNet, the distributed open-source microblogging tool
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*
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* Plugin to enable LDAP Authorization
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*
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* PHP version 5
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*
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* LICENCE: This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* @category Plugin
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* @package StatusNet
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* @author Craig Andrews <candrews@integralblue.com>
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* @copyright 2009 Craig Andrews http://candrews.integralblue.com
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* @license http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
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* @link http://status.net/
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*/
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if (!defined('STATUSNET') && !defined('LACONICA')) {
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exit(1);
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}
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require_once 'Net/LDAP2.php';
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class LdapAuthorizationPlugin extends AuthorizationPlugin
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{
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public $host=null;
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public $port=null;
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public $version=null;
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public $starttls=null;
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public $binddn=null;
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public $bindpw=null;
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public $basedn=null;
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public $options=null;
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public $filter=null;
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public $scope=null;
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public $provider_name = null;
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public $uniqueMember_attribute = null;
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public $roles_to_groups = array();
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public $login_group = null;
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public $attributes = array();
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function onInitializePlugin(){
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if(!isset($this->host)){
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throw new Exception("must specify a host");
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}
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if(!isset($this->basedn)){
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throw new Exception("must specify a basedn");
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}
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if(!isset($this->provider_name)){
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throw new Exception("provider_name must be set. Use the provider_name from the LDAP Authentication plugin.");
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}
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if(!isset($this->uniqueMember_attribute)){
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throw new Exception("uniqueMember_attribute must be set.");
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}
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if(!isset($this->attributes['username'])){
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throw new Exception("username attribute must be set.");
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}
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}
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//---interface implementation---//
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function loginAllowed($user) {
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$user_username = new User_username();
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$user_username->user_id=$user->id;
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$user_username->provider_name=$this->provider_name;
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if($user_username->find() && $user_username->fetch()){
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$entry = $this->ldap_get_user($user_username->username);
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if($entry){
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if(isset($this->login_group)){
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if(is_array($this->login_group)){
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foreach($this->login_group as $group){
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if($this->ldap_is_dn_member_of_group($entry->dn(),$group)){
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return true;
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}
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}
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}else{
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if($this->ldap_is_dn_member_of_group($entry->dn(),$this->login_group)){
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return true;
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}
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}
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return null;
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}else{
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//if a user exists, we can assume he's allowed to login
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return true;
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}
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}else{
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return null;
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}
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}else{
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return null;
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}
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}
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function hasRole($profile, $name) {
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$user_username = new User_username();
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$user_username->user_id=$profile->id;
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$user_username->provider_name=$this->provider_name;
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if($user_username->find() && $user_username->fetch()){
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$entry = $this->ldap_get_user($user_username->username);
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if($entry){
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if(isset($this->roles_to_groups[$name])){
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if(is_array($this->roles_to_groups[$name])){
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foreach($this->roles_to_groups[$name] as $group){
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if($this->ldap_is_dn_member_of_group($entry->dn(),$group)){
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return true;
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}
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}
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}else{
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if($this->ldap_is_dn_member_of_group($entry->dn(),$this->roles_to_groups[$name])){
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return true;
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}
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}
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}
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}
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}
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return false;
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}
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function ldap_is_dn_member_of_group($userDn, $groupDn)
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{
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$ldap = $this->ldap_get_connection();
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$link = $ldap->getLink();
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$r = ldap_compare($link, $groupDn, $this->uniqueMember_attribute, $userDn);
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if ($r === true){
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return true;
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}else if($r === false){
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return false;
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}else{
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common_log(LOG_ERR, ldap_error($r));
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return false;
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}
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}
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function ldap_get_config(){
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$config = array();
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$keys = array('host','port','version','starttls','binddn','bindpw','basedn','options','filter','scope');
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foreach($keys as $key){
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$value = $this->$key;
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if($value!==null){
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$config[$key]=$value;
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}
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}
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return $config;
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}
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//-----the below function were copied from LDAPAuthenticationPlugin. They will be moved to a utility class soon.----\\
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function ldap_get_connection($config = null){
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if($config == null && isset($this->default_ldap)){
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return $this->default_ldap;
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}
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//cannot use Net_LDAP2::connect() as StatusNet uses
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//PEAR::setErrorHandling(PEAR_ERROR_CALLBACK, 'handleError');
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//PEAR handling can be overridden on instance objects, so we do that.
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$ldap = new Net_LDAP2(isset($config)?$config:$this->ldap_get_config());
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$ldap->setErrorHandling(PEAR_ERROR_RETURN);
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$err=$ldap->bind();
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if (Net_LDAP2::isError($err)) {
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common_log(LOG_WARNING, 'Could not connect to LDAP server: '.$err->getMessage());
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return false;
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}
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if($config == null) $this->default_ldap=$ldap;
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return $ldap;
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}
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/**
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* get an LDAP entry for a user with a given username
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*
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* @param string $username
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* $param array $attributes LDAP attributes to retrieve
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* @return string DN
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*/
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function ldap_get_user($username,$attributes=array(),$ldap=null){
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if($ldap==null) {
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$ldap = $this->ldap_get_connection();
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}
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$filter = Net_LDAP2_Filter::create($this->attributes['username'], 'equals', $username);
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$options = array(
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'attributes' => $attributes
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);
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$search = $ldap->search(null,$filter,$options);
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if (PEAR::isError($search)) {
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common_log(LOG_WARNING, 'Error while getting DN for user: '.$search->getMessage());
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return false;
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}
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if($search->count()==0){
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return false;
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}else if($search->count()==1){
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$entry = $search->shiftEntry();
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return $entry;
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}else{
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common_log(LOG_WARNING, 'Found ' . $search->count() . ' ldap user with the username: ' . $username);
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return false;
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}
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}
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function onPluginVersion(&$versions)
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{
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$versions[] = array('name' => 'LDAP Authorization',
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'version' => STATUSNET_VERSION,
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'author' => 'Craig Andrews',
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'homepage' => 'http://status.net/wiki/Plugin:LdapAuthorization',
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'rawdescription' =>
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_m('The LDAP Authorization plugin allows for StatusNet to handle authorization through LDAP.'));
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return true;
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}
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}
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