mirror of
https://github.com/EGroupware/egroupware.git
synced 2024-11-28 19:03:14 +01:00
306 lines
8.6 KiB
PHP
306 lines
8.6 KiB
PHP
<?php
|
|
/**
|
|
* EGroupware API - LDAP connection handling
|
|
*
|
|
* @link http://www.egroupware.org
|
|
* @author Lars Kneschke <l.kneschke@metaways.de>
|
|
* @author Ralf Becker <RalfBecker-AT-outdoor-training.de>
|
|
*
|
|
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
|
|
* @package api
|
|
* @subpackage ldap
|
|
* @version $Id$
|
|
*/
|
|
|
|
namespace EGroupware\Api;
|
|
|
|
/**
|
|
* LDAP connection handling
|
|
*
|
|
* Please note for SSL or TLS connections hostname has to be:
|
|
* - SSL: "ldaps://host[:port]/"
|
|
* - TLS: "tls://host[:port]/"
|
|
* Both require certificats installed on the webserver, otherwise the connection will fail!
|
|
*
|
|
* If multiple (space-separated) ldap hosts or urls are given, try them in order and
|
|
* move first successful one to first place in session, to try not working ones
|
|
* only once per session.
|
|
*
|
|
* Use Api\Ldap::factory($resource=true, $host='', $dn='', $passwd='') to open only a single connection.
|
|
*/
|
|
class Ldap
|
|
{
|
|
/**
|
|
* Holds the LDAP link identifier
|
|
*
|
|
* @var resource $ds
|
|
*/
|
|
var $ds;
|
|
|
|
/**
|
|
* Holds the detected information about the connected ldap server
|
|
*
|
|
* @var Ldap\ServerInfo $ldapserverinfo
|
|
*/
|
|
var $ldapserverinfo;
|
|
|
|
/**
|
|
* Throw Exceptions in ldapConnect instead of echoing error and returning false
|
|
*
|
|
* @var boolean $exception_on_error
|
|
*/
|
|
var $exception_on_error=false;
|
|
|
|
/**
|
|
* Constructor
|
|
*
|
|
* @param boolean $exception_on_error =false true: throw Exceptions in ldapConnect instead of echoing error and returning false
|
|
*/
|
|
function __construct($exception_on_error=false)
|
|
{
|
|
$this->exception_on_error = $exception_on_error;
|
|
$this->restoreSessionData();
|
|
}
|
|
|
|
/**
|
|
* Connections created with factory method
|
|
*
|
|
* @var array
|
|
*/
|
|
protected static $connections = array();
|
|
|
|
/**
|
|
* Connect to ldap server and return a handle or Api\Ldap object
|
|
*
|
|
* Use this factory method to open only a single connection to LDAP server!
|
|
*
|
|
* @param boolean $ressource =true true: return LDAP ressource for ldap_*-methods,
|
|
* false: return connected instances of this Api\Ldap class
|
|
* @param string $host ='' ldap host, default $GLOBALS['egw_info']['server']['ldap_host']
|
|
* @param string $dn ='' ldap dn, default $GLOBALS['egw_info']['server']['ldap_root_dn']
|
|
* @param string $passwd ='' ldap pw, default $GLOBALS['egw_info']['server']['ldap_root_pw']
|
|
* @return resource|Ldap resource from ldap_connect() or false on error
|
|
* @throws Exception\AssertionFailed 'LDAP support unavailable!' (no ldap extension)
|
|
* @throws Exception\NoPermission if bind fails
|
|
*/
|
|
public static function factory($ressource=true, $host='', $dn='', $passwd='')
|
|
{
|
|
$key = md5($host.':'.$dn.':'.$passwd);
|
|
|
|
if (!isset(self::$connections[$key]))
|
|
{
|
|
self::$connections[$key] = new Ldap(true);
|
|
|
|
self::$connections[$key]->ldapConnect($host, $dn, $passwd);
|
|
}
|
|
return $ressource ? self::$connections[$key]->ds : self::$connections[$key];
|
|
}
|
|
|
|
/**
|
|
* Returns information about connected ldap server
|
|
*
|
|
* @return Ldap\ServerInfo|null
|
|
*/
|
|
function getLDAPServerInfo()
|
|
{
|
|
return $this->ldapserverinfo;
|
|
}
|
|
|
|
/**
|
|
* escapes a string for use in searchfilters meant for ldap_search.
|
|
*
|
|
* Escaped Characters are: '*', '(', ')', ' ', '\', NUL
|
|
* It's actually a PHP-Bug, that we have to escape space.
|
|
* For all other Characters, refer to RFC2254.
|
|
*
|
|
* @param string|array $string either a string to be escaped, or an array of values to be escaped
|
|
* @return string
|
|
*/
|
|
static function quote($string)
|
|
{
|
|
return str_replace(array('\\','*','(',')','\0',' '),array('\\\\','\*','\(','\)','\\0','\20'),$string);
|
|
}
|
|
|
|
/**
|
|
* Convert a single ldap result into a associative array
|
|
*
|
|
* @param array $ldap array with numerical and associative indexes and count's
|
|
* @param int $depth=0 0: single result / ldap_read, 1: multiple results / ldap_search
|
|
* @return boolean|array with only associative index and no count's or false on error (parm is no array)
|
|
*/
|
|
static function result2array($ldap, $depth=0)
|
|
{
|
|
if (!is_array($ldap)) return false;
|
|
|
|
$arr = array();
|
|
foreach($ldap as $var => $val)
|
|
{
|
|
if (is_int($var) && !$depth || $var === 'count') continue;
|
|
|
|
if ($depth && is_array($val))
|
|
{
|
|
$arr[$var] = self::result2array($val, $depth-1);
|
|
}
|
|
elseif (is_array($val) && $val['count'] == 1)
|
|
{
|
|
$arr[$var] = $val[0];
|
|
}
|
|
else
|
|
{
|
|
if (is_array($val)) unset($val['count']);
|
|
|
|
$arr[$var] = $val;
|
|
}
|
|
}
|
|
return $arr;
|
|
}
|
|
|
|
/**
|
|
* Connect to ldap server and return a handle
|
|
*
|
|
* If multiple (space-separated) ldap hosts or urls are given, try them in order and
|
|
* move first successful one to first place in session, to try not working ones
|
|
* only once per session.
|
|
*
|
|
* @param string $host ='' ldap host, default $GLOBALS['egw_info']['server']['ldap_host']
|
|
* @param string $dn ='' ldap dn, default $GLOBALS['egw_info']['server']['ldap_root_dn']
|
|
* @param string $passwd ='' ldap pw, default $GLOBALS['egw_info']['server']['ldap_root_pw']
|
|
* @return resource|boolean resource from ldap_connect() or false on error
|
|
* @throws Exception\AssertionFailed 'LDAP support unavailable!' (no ldap extension)
|
|
* @throws Exception\NoPermission if bind fails
|
|
*/
|
|
function ldapConnect($host='', $dn='', $passwd='')
|
|
{
|
|
if(!function_exists('ldap_connect'))
|
|
{
|
|
if ($this->exception_on_error) throw new Exception\AssertionFailed('LDAP support unavailable!');
|
|
|
|
printf('<b>Error: LDAP support unavailable</b><br>');
|
|
return False;
|
|
}
|
|
if (empty($host))
|
|
{
|
|
$host = $GLOBALS['egw_info']['server']['ldap_host'];
|
|
}
|
|
if (empty($dn))
|
|
{
|
|
$dn = $GLOBALS['egw_info']['server']['ldap_root_dn'];
|
|
$passwd = $GLOBALS['egw_info']['server']['ldap_root_pw'];
|
|
}
|
|
|
|
// if multiple hosts given, try them all, but only once per session!
|
|
if (isset($_SESSION) && isset($_SESSION['ldapConnect']) && isset($_SESSION['ldapConnect'][$host]))
|
|
{
|
|
$host = $_SESSION['ldapConnect'][$host];
|
|
}
|
|
foreach($hosts=preg_split('/[ ,;]+/', $host) as $h)
|
|
{
|
|
if ($this->_connect($h, $dn, $passwd))
|
|
{
|
|
if ($h !== $host)
|
|
{
|
|
if (isset($_SESSION)) // store working host as first choice in session
|
|
{
|
|
$_SESSION['ldapConnect'][$host] = implode(' ',array_unique(array_merge(array($h),$hosts)));
|
|
}
|
|
}
|
|
return $this->ds;
|
|
}
|
|
error_log(__METHOD__."('$h', '$dn', \$passwd) Can't connect/bind to ldap server!".
|
|
($this->ds ? ' '.ldap_error($this->ds).' ('.ldap_errno($this->ds).')' : '').
|
|
' '.function_backtrace());
|
|
}
|
|
// give visible error, only if we cant connect to any ldap server
|
|
if ($this->exception_on_error) throw new Exception\NoPermission("Can't connect/bind to LDAP server '$host' and dn='$dn'!");
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* connect to the ldap server and return a handle
|
|
*
|
|
* @param string $host ldap host
|
|
* @param string $dn ldap dn
|
|
* @param string $passwd ldap pw
|
|
* @return resource|boolean resource from ldap_connect() or false on error
|
|
*/
|
|
private function _connect($host, $dn, $passwd)
|
|
{
|
|
if (($use_tls = substr($host,0,6) == 'tls://'))
|
|
{
|
|
$port = parse_url($host,PHP_URL_PORT);
|
|
$host = parse_url($host,PHP_URL_HOST);
|
|
}
|
|
// connect to ldap server (never fails, as connection happens in bind!)
|
|
if(!$host || !($this->ds = !empty($port) ? ldap_connect($host, $port) : ldap_connect($host)))
|
|
{
|
|
return False;
|
|
}
|
|
// set network timeout to not block for minutes
|
|
ldap_set_option($this->ds, LDAP_OPT_NETWORK_TIMEOUT, 5);
|
|
|
|
if(ldap_set_option($this->ds, LDAP_OPT_PROTOCOL_VERSION, 3))
|
|
{
|
|
$supportedLDAPVersion = 3;
|
|
}
|
|
else
|
|
{
|
|
$supportedLDAPVersion = 2;
|
|
}
|
|
if ($use_tls) ldap_start_tls($this->ds);
|
|
|
|
if (!isset($this->ldapserverinfo) ||
|
|
!is_a($this->ldapserverinfo,'EGroupware\Ldap\ServerInfo') ||
|
|
$this->ldapserverinfo->host != $host)
|
|
{
|
|
//error_log("no ldap server info found");
|
|
@ldap_bind($this->ds, $GLOBALS['egw_info']['server']['ldap_root_dn'], $GLOBALS['egw_info']['server']['ldap_root_pw']);
|
|
|
|
$this->ldapserverinfo = Ldap\ServerInfo::get($this->ds, $host, $supportedLDAPVersion);
|
|
$this->saveSessionData();
|
|
}
|
|
|
|
if(!@ldap_bind($this->ds, $dn, $passwd))
|
|
{
|
|
return False;
|
|
}
|
|
|
|
return $this->ds;
|
|
}
|
|
|
|
/**
|
|
* disconnect from the ldap server
|
|
*/
|
|
function ldapDisconnect()
|
|
{
|
|
if(is_resource($this->ds))
|
|
{
|
|
ldap_unbind($this->ds);
|
|
unset($this->ds);
|
|
unset($this->ldapserverinfo);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* restore the session data
|
|
*/
|
|
function restoreSessionData()
|
|
{
|
|
if (isset($GLOBALS['egw']->session)) // no availible in setup
|
|
{
|
|
$this->ldapserverinfo = Cache::getSession(__CLASS__, 'ldapServerInfo');
|
|
}
|
|
}
|
|
|
|
/**
|
|
* save the session data
|
|
*/
|
|
function saveSessionData()
|
|
{
|
|
if (isset($GLOBALS['egw']->session)) // no availible in setup
|
|
{
|
|
Cache::setSession(__CLASS__, 'ldapServerInfo', $this->ldapserverinfo);
|
|
}
|
|
}
|
|
}
|