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<?php
// +---------------------------------------------------------------------------+
// This file is part of Stud.IP
// StudipAuthLdap.php
// Stud.IP authentication against LDAP Server
//
// Copyright (c) 2003 André Noack <noack@data-quest.de>
// Suchi & Berg GmbH <info@data-quest.de>
// +---------------------------------------------------------------------------+
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// +---------------------------------------------------------------------------+
/**
* Stud.IP authentication against LDAP Server
*
* Stud.IP authentication against LDAP Server
*
* @access public
* @author André Noack <noack@data-quest.de>
* @package
*/
class StudipAuthLdap extends StudipAuthAbstract
{
public $anonymous_bind = true;
public $host;
public $base_dn;
public $username_attribute = 'uid';
public $ldap_filter;
public $bad_char_regex = '/[^0-9_a-zA-Z]/';
public $show_login = true;
public $conn = null;
public $user_data = null;
function getLdapFilter($username)
{
if (isset($this->ldap_filter)) {
list($user, $domain) = explode('@', $username);
$search = ['%u', '%U', '%d', '%%'];
$replace = [$username, $user, $domain, '%'];
return str_replace($search, $replace, $this->ldap_filter);
}
return $this->username_attribute . '=' . $username;
}
function doLdapConnect()
{
if (!($this->conn = ldap_connect($this->host))) {
$this->error_msg = _('Keine Verbindung zum LDAP Server möglich.');
return false;
}
if (!($r = ldap_set_option($this->conn, LDAP_OPT_PROTOCOL_VERSION, 3))) {
$this->error_msg = _('Setzen der LDAP Protokolversion fehlgeschlagen.');
return false;
}
if ($this->start_tls) {
if (!ldap_start_tls($this->conn)) {
$this->error_msg = _('"Start TLS" fehlgeschlagen.');
return false;
}
}
return true;
}
function getUserDn($username)
{
$user_dn = '';
if ($this->anonymous_bind) {
if (!($r = @ldap_bind($this->conn))) {
$this->error_msg = _('Anonymer Bind fehlgeschlagen.') . $this->getLdapError();
return false;
}
if (!($result = @ldap_search($this->conn, $this->base_dn, $this->getLdapFilter($username), ['dn']))) {
$this->error_msg = _('Anonymes Durchsuchen des LDAP Baumes fehlgeschlagen.') . $this->getLdapError();
return false;
}
if (!ldap_count_entries($this->conn, $result)) {
$this->error_msg = sprintf(_('%s wurde nicht unterhalb von %s gefunden.'), $username, $this->base_dn);
return false;
}
if (!($entry = @ldap_first_entry($this->conn, $result))) {
$this->error_msg = $this->getLdapError();
return false;
}
if (!($user_dn = @ldap_get_dn($this->conn, $entry))) {
$this->error_msg = $this->getLdapError();
return false;
}
} else {
$user_dn = $this->username_attribute . '=' . $username . ',' . $this->base_dn;
}
return $user_dn;
}
function doLdapBind($username, $password)
{
if (!$this->doLdapConnect()) {
return false;
}
if (!($user_dn = $this->getUserDn($username))) {
return false;
}
if (!$password) {
$this->error_msg = _('Kein Passwort eingegeben.'); //some ldap servers seem to allow binding with a user dn and without a password, if anonymous bind is enabled
return false;
}
if (!($r = @ldap_bind($this->conn, $user_dn, $password))) {
if (ldap_errno($this->conn) == 49) {
$this->error_msg = _('Bitte überprüfen Sie ihre Zugangsdaten.');
}
$this->error_msg = _('Anmeldung fehlgeschlagen.') . $this->getLdapError();
return false;
}
if (!($result = @ldap_search($this->conn, $user_dn, 'objectclass=*'))) {
$this->error_msg = _('Abholen der Benutzer Attribute fehlgeschlagen.') . $this->getLdapError();
return false;
}
if (@ldap_count_entries($this->conn, $result)) {
if (!($info = @ldap_get_entries($this->conn, $result))) {
$this->error_msg = $this->getLdapError();
return false;
}
}
$this->user_data = $info[0];
return true;
}
/**
*
*
*
* @access private
*
*/
function isAuthenticated($username, $password)
{
if (!$this->doLdapBind($username, $password)) {
ldap_unbind($this->conn);
return false;
}
ldap_unbind($this->conn);
return true;
}
function doLdapMap($map_params)
{
if (isset($this->user_data[$map_params][0])) {
$ret = $this->user_data[$map_params][0];
if ($ret[0] === ':') {
$ret = base64_decode($ret);
}
}
return $ret;
}
function doLdapMapDatafield($params)
{
$datafield_id = $params[1];
$user = $params[2];
$ldap_field = $this->doLdapMap($params[3]);
if (isset($ldap_field)) {
$df = $user->datafields->findOneBy('datafield_id', $datafield_id);
if ($df) {
$df->content = $ldap_field;
return true;
}
}
}
function isUsedUsername($username)
{
if (!$this->anonymous_bind) {
$this->error_msg = _('Kann den Benutzernamen nicht überprüfen, anonymous_bind ist ausgeschaltet!');
return false;
}
if (!$this->doLdapConnect()) {
return false;
}
if (!($r = @ldap_bind($this->conn))) {
$this->error_msg = _('Anonymer Bind fehlgeschlagen.') . $this->getLdapError();
return false;
}
if (!($result = @ldap_search($this->conn, $this->base_dn, $this->getLdapFilter($username), ['dn']))) {
$this->error_msg = _('Anonymes Durchsuchen des LDAP Baumes fehlgeschlagen.') . $this->getLdapError();
return false;
}
if (!ldap_count_entries($this->conn, $result)) {
$this->error_msg = _('Der Benutzername wurde nicht gefunden.');
return false;
}
return true;
}
function getLdapError()
{
return _('<br>LDAP Fehler: ') . ldap_error($this->conn) . ' (#' . ldap_errno($this->conn) . ')';
}
}
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