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<?php
/**
* ownCloud – LDAP group backend
*
* @author Arthur Schiwon
* @copyright 2012 Arthur Schiwon blizzz@owncloud.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library 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 library. If not, see <http://www.gnu.org/licenses/>.
*
*/
class OC_GROUP_LDAP extends OC_Group_Backend {
// //group specific settings
protected $ldapGroupFilter;
protected $ldapGroupMemberAssocAttr;
protected $configured = false;
protected $_group_user = array();
protected $_user_groups = array();
protected $_group_users = array();
protected $_groups = array();
public function __construct() {
$this->ldapGroupFilter = OCP\Config::getAppValue('user_ldap', 'ldap_group_filter', '(objectClass=posixGroup)');
$this->ldapGroupMemberAssocAttr = OCP\Config::getAppValue('user_ldap', 'ldap_group_member_assoc_attribute', 'uniqueMember');
if(!empty($this->ldapGroupFilter) && !empty($this->ldapGroupMemberAssocAttr)) {
$this->configured = true;
}
}
/**
* @brief is user in group?
* @param $uid uid of the user
* @param $gid gid of the group
* @returns true/false
*
* Checks whether the user is member of a group or not.
*/
public function inGroup($uid, $gid) {
if(!$this->configured) {
return false;
}
if(isset($this->_group_user[$gid][$uid])) {
return $this->_group_user[$gid][$uid];
}
$dn_user = OC_LDAP::username2dn($uid);
$dn_group = OC_LDAP::groupname2dn($gid);
// just in case
if(!$dn_group || !$dn_user) {
return false;
}
//usually, LDAP attributes are said to be case insensitive. But there are exceptions of course.
$members = OC_LDAP::readAttribute($dn_group, $this->ldapGroupMemberAssocAttr);
if(!$members) {
return false;
}
//extra work if we don't get back user DNs
//TODO: this can be done with one LDAP query
if(strtolower($this->ldapGroupMemberAssocAttr) == 'memberuid') {
$dns = array();
foreach($members as $mid) {
$filter = str_replace('%uid', $mid, OC_LDAP::conf('ldapLoginFilter'));
$ldap_users = OC_LDAP::fetchListOfUsers($filter, 'dn');
if(count($ldap_users) < 1) {
continue;
}
$dns[] = $ldap_users[0];
}
$members = $dns;
}
$this->_group_user[$gid][$uid] = in_array($dn_user, $members);
return $this->_group_user[$gid][$uid];
}
/**
* @brief Get all groups a user belongs to
* @param $uid Name of the user
* @returns array with group names
*
* This function fetches all groups a user belongs to. It does not check
* if the user exists at all.
*/
public function getUserGroups($uid) {
if(!$this->configured) {
return array();
}
if(isset($this->_user_groups[$uid])) {
return $this->_user_groups[$uid];
}
$userDN = OC_LDAP::username2dn($uid);
if(!$userDN) {
$this->_user_groups[$uid] = array();
return array();
}
//uniqueMember takes DN, memberuid the uid, so we need to distinguish
if((strtolower($this->ldapGroupMemberAssocAttr) == 'uniquemember')
|| (strtolower($this->ldapGroupMemberAssocAttr) == 'member')) {
$uid = $userDN;
} else if(strtolower($this->ldapGroupMemberAssocAttr) == 'memberuid') {
$result = OC_LDAP::readAttribute($userDN, 'uid');
$uid = $result[0];
} else {
// just in case
$uid = $userDN;
}
$filter = OC_LDAP::combineFilterWithAnd(array(
$this->ldapGroupFilter,
$this->ldapGroupMemberAssocAttr.'='.$uid
));
$groups = OC_LDAP::fetchListOfGroups($filter, array(OC_LDAP::conf('ldapGroupDisplayName'),'dn'));
$this->_user_groups[$uid] = array_unique(OC_LDAP::ownCloudGroupNames($groups), SORT_LOCALE_STRING);
return $this->_user_groups[$uid];
}
/**
* @brief get a list of all users in a group
* @returns array with user ids
*/
public function usersInGroup($gid) {
if(!$this->configured) {
return array();
}
if(isset($this->_group_users[$gid])) {
return $this->_group_users[$gid];
}
$groupDN = OC_LDAP::groupname2dn($gid);
if(!$groupDN) {
$this->_group_users[$gid] = array();
return array();
}
$members = OC_LDAP::readAttribute($groupDN, $this->ldapGroupMemberAssocAttr);
if(!$members) {
$this->_group_users[$gid] = array();
return array();
}
$result = array();
$isMemberUid = (strtolower($this->ldapGroupMemberAssocAttr) == 'memberuid');
foreach($members as $member) {
if($isMemberUid) {
$filter = str_replace('%uid', $member, OC_LDAP::conf('ldapLoginFilter'));
$ldap_users = OC_LDAP::fetchListOfUsers($filter, 'dn');
if(count($ldap_users) < 1) {
continue;
}
$result[] = OC_LDAP::dn2username($ldap_users[0]);
continue;
} else {
$result[] = OC_LDAP::dn2username($member);
}
}
if(!$isMemberUid) {
$result = array_intersect($result, OCP\User::getUsers());
}
$this->_group_users[$gid] = array_unique($result, SORT_LOCALE_STRING);
return $this->_group_users[$gid];
}
/**
* @brief get a list of all groups
* @returns array with group names
*
* Returns a list with all groups
*/
public function getGroups() {
if(!$this->configured) {
return array();
}
if(is_null($this->_groups)) {
$ldap_groups = OC_LDAP::fetchListOfGroups($this->ldapGroupFilter, array(OC_LDAP::conf('ldapGroupDisplayName'), 'dn'));
$this->_groups = OC_LDAP::ownCloudGroupNames($ldap_groups);
}
return $this->groups;
}
/**
* check if a group exists
* @param string $gid
* @return bool
*/
public function groupExists($gid){
return in_array($gid, $this->getGroups());
}
}
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