<?php
/*
$Id$
This code is part of LDAP Account Manager (http://www.sourceforge.net/projects/lam)
Copyright (C) 2003 Roland Gruber
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
(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 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
*/
// ldap.inc provides basic functions to connect to the OpenLDAP server.
include_once("config.inc");
class Ldap{
// object of Config to access preferences
var $conf;
// server handle
var $server;
// LDAP username and password used for bind
var $username;
var $password;
// Arrays that contain LDAP attributes and their descriptions which are translated
var $ldapUserAttributes;
var $ldapGroupAttributes;
var $ldapHostAttributes;
// constructor
// $config has to be an object of Config (../config/config.php)
function Ldap($config) {
if (is_object($config)) $this->conf = $config;
else { echo _("Ldap->Ldap failed!"); exit;}
// construct arrays with known LDAP attributes
$this->ldapUserAttributes = array (
"uid" => _("User ID"),
"uidNumber" => _("UID Number"),
"gidNumber" => _("GID Number"),
"cn" => _("User Name"),
"host" => _("Allowed Hosts"),
"givenName" => _("First Name"),
"sn" => _("Last Name"),
"homeDirectory" => _("Home Directory"),
"loginShell" => _("Login Shell"),
"mail" => _("E-Mail"),
"gecos" => _("description")
);
$this->ldapGroupAttributes = array (
"cn" => _("Group Name"),
"gidNumber" => _("GID Number"),
"memberUID" => _("Group Members"),
"member" => _("Group Member DNs"),
"description" => _("Group Description")
);
$this->ldapHostAttributes = array (
"uid" => _("Host Username"),
"cn" => _("Host Name"),
"rid" => _("RID (Windows UID)"),
"description" => _("Host Description")
);
}
// connects to the server using the given username and password
// $base is optional and specifies the root from where to search for entries
// if connect succeeds the server handle is returned
function connect($user, $passwd) {
// close any prior connection
@$this->close();
// do not allow anonymous bind
if ((!$user)||($user == "")||(!$passwd)) {
echo ("<html><head><title></title>");
echo ("<link rel=\"stylesheet\" type=\"text/css\" href=\"../style/layout.css\"></head><body>");
StatusMessage("ERROR", "", _("No username was specified or password is empty!"));
echo ("<br><br><a href=\"login.php\">" . _("Back to Login") . "</a></body></html>");
exit;
}
// save password und username encrypted
$this->encrypt($user, $passwd);
$this->server = @ldap_connect($this->conf->get_ServerURL());
if ($this->server) {
// use LDAPv3
ldap_set_option($this->server, LDAP_OPT_PROTOCOL_VERSION, 3);
$bind = @ldap_bind($this->server, $user, $passwd);
if ($bind) {
// return server handle
return $this->server;
}
}
}
// closes connection to server
function close() {
ldap_close($this->server);
}
// searches LDAP for a specific user name
// and returns its DN entry
function search_username($name) {
if ($this->conf->get_samba3() == "yes") {
// users have the attribute "posixAccount" or "sambaSamAccount" and uid $name
$filter = "(&(objectClass=sambaSamAccount) (uid=$name))";
}
else {
// users have the attribute "posixAccount" or "sambaAccount" and uid $name
$filter = "(&(objectClass=sambaAccount) (uid=$name))";
}
$attrs = array();
$sr = @ldap_search($this->server, $this->conf->get_UserSuffix(), $filter, $attrs);
if ($sr) {
$info = ldap_get_entries($this->server, $sr);
// return only first DN entry
$ret = $info[0]["dn"];
ldap_free_result($sr);
return $ret;
}
}
// returns an array with all organizational units under the given suffix
function search_units($suffix) {
$ret = array();
$sr = @ldap_search($_SESSION["ldap"]->server(), $suffix, "objectClass=organizationalunit", array("DN"));
if ($sr) {
$units = ldap_get_entries($_SESSION["ldap"]->server, $sr);
// extract Dns
for ($i = 0; $i < sizeof($units); $i++) {
if ($units[$i]['dn']) $ret[] = $units[$i]['dn'];
}
}
// add root suffix if needed
$found == false;
for ($i = 0; $i < sizeof($ret); $i++) { // search suffix case-intensitive
if (strtolower($suffix) == strtolower($ret[$i])) {
$found = true;
break;
}
}
if (!$found) {
$ret[] = $suffix;
}
usort($ret, array($this,"cmp_array"));
return $ret;
}
// returns the LDAP connection handle
function server() {
return $this->server;
}
// closes connection to LDAP server before serialization
function __sleep() {
$this->close();
// define which attributes to save
return array("conf", "username", "password", "ldapUserAttributes", "ldapGroupAttributes", "ldapHostAttributes");
}
// reconnects to LDAP server when deserialized
function __wakeup() {
$data = $this->decrypt();
$this->connect($data[0], $data[1]);
}
// encrypts username and password
function encrypt($username, $password) {
// read key and iv from cookie
$iv = base64_decode($_COOKIE["IV"]);
$key = base64_decode($_COOKIE["Key"]);
// encrypt username and password
$this->username = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $username, MCRYPT_MODE_ECB, $iv));
$this->password = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $key, $password, MCRYPT_MODE_ECB, $iv));
}
// decrypts username and password
function decrypt() {
// read key and iv from cookie
$iv = base64_decode($_COOKIE["IV"]);
$key = base64_decode($_COOKIE["Key"]);
// decrypt username and password
$username = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, base64_decode($this->username), MCRYPT_MODE_ECB, $iv);
$password = mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $key, base64_decode($this->password), MCRYPT_MODE_ECB, $iv);
$ret = array($username, $password);
$ret[0] = str_replace(chr(00), "", $ret[0]);
$ret[1] = str_replace(chr(00), "", $ret[1]);
return $ret;
}
// closes connection to LDAP server and deletes encrypted username/password
function destroy() {
$this->close();
$this->username="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
$this->password="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
}
// returns an array that contains LDAP attribute names and their description
function attributeUserArray() {
return $this->ldapUserAttributes;
}
// returns an array that contains LDAP attribute names and their description
function attributeGroupArray() {
return $this->ldapGroupAttributes;
}
// returns an array that contains LDAP attribute names and their description
function attributeHostArray() {
return $this->ldapHostAttributes;
}
// helper function to sort the unit DNs
function cmp_array($a, $b) {
// split DNs
$array_a = explode(",", $a);
$array_b = explode(",", $b);
$len_a = sizeof($array_a);
$len_b = sizeof($array_b);
// check how many parts to compare
$len = min($len_a, $len_b);
// compare from last part on
for ($i = 0; $i < $len; $i++) {
// get parts to compare
$part_a = strtolower($array_a[$len_a - $i - 1]);
$part_b = strtolower($array_b[$len_b - $i - 1]);
// compare parts
if ($part_a == $part_b) { // part is identical
if ($i == ($len - 1)) {
if ($len_a > $len_b) return 1;
elseif ($len_a < $len_b) return -1;
else return 0; // DNs are identical
}
}
elseif ($part_a == max($part_a, $part_b)) return 1;
else return -1;
}
}
}
?>