mirror of
https://github.com/EGroupware/egroupware.git
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328 lines
13 KiB
PHP
328 lines
13 KiB
PHP
<?php
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/**
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* EGroupware API - LDAP Authentication
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*
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* To be able to use SSL or TLS you either need:
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* a) ldap to have certificate store INCL. used certificate!
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* b) add to /etc/openldap/ldap.conf: TLS_REQCERT never
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* to tell ldap not to validate certificates (insecure)
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*
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* @link http://www.egroupware.org
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* @author Ralf Becker <ralfbecker@outdoor-training.de>
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* @author Lars Kneschke <lkneschke@linux-at-work.de>
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* @author Joseph Engo <jengo@phpgroupware.org>
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* Copyright (C) 2000, 2001 Joseph Engo
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* Copyright (C) 2002, 2003 Lars Kneschke
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* @license http://opensource.org/licenses/lgpl-license.php LGPL - GNU Lesser General Public License
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* @package api
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* @subpackage authentication
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* @version $Id$
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*/
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/**
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* Authentication agains a LDAP Server
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*/
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class auth_ldap implements auth_backend
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{
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var $previous_login = -1;
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/**
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* Switch this on to get messages in Apache error_log, why authtication fails
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*
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* @var boolean
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*/
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var $debug = false;
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/**
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* authentication against LDAP
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*
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* @param string $username username of account to authenticate
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* @param string $passwd corresponding password
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* @return boolean true if successful authenticated, false otherwise
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*/
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function authenticate($username, $passwd, $passwd_type='text')
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{
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// allow non-ascii in username & password
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$username = translation::convert($username,translation::charset(),'utf-8');
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$passwd = translation::convert($passwd,translation::charset(),'utf-8');
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if(!$ldap = common::ldapConnect())
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{
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return False;
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}
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/* Login with the LDAP Admin. User to find the User DN. */
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if(!@ldap_bind($ldap, $GLOBALS['egw_info']['server']['ldap_root_dn'], $GLOBALS['egw_info']['server']['ldap_root_pw']))
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{
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if ($this->debug) error_log(__METHOD__."('$username',\$password) can NOT bind with ldap_root_dn to search!");
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return False;
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}
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/* find the dn for this uid, the uid is not always in the dn */
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$attributes = array('uid','dn','givenName','sn','mail','uidNumber','shadowExpire','homeDirectory');
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$filter = $GLOBALS['egw_info']['server']['ldap_search_filter'] ? $GLOBALS['egw_info']['server']['ldap_search_filter'] : '(uid=%user)';
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$filter = str_replace(array('%user','%domain'),array(ldap::quote($username),$GLOBALS['egw_info']['user']['domain']),$filter);
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if ($GLOBALS['egw_info']['server']['account_repository'] == 'ldap')
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{
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$filter = "(&$filter(objectclass=posixaccount))";
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}
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$sri = ldap_search($ldap, $GLOBALS['egw_info']['server']['ldap_context'], $filter, $attributes);
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$allValues = ldap_get_entries($ldap, $sri);
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if ($allValues['count'] > 0)
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{
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if ($GLOBALS['egw_info']['server']['case_sensitive_username'] == true &&
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$allValues[0]['uid'][0] != $username)
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{
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if ($this->debug) error_log(__METHOD__."('$username',\$password) wrong case in username!");
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return false;
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}
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if ($GLOBALS['egw_info']['server']['account_repository'] == 'ldap' &&
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isset($allValues[0]['shadowexpire']) && $allValues[0]['shadowexpire'][0]*24*3600 < time())
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{
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if ($this->debug) error_log(__METHOD__."('$username',\$password) account is expired!");
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return false; // account is expired
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}
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$userDN = $allValues[0]['dn'];
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// try to bind as the user with user suplied password
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// only if a non-empty password given, in case anonymous search is enabled
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if (!empty($passwd) && ($ret = @ldap_bind($ldap, $userDN, $passwd)))
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{
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if ($GLOBALS['egw_info']['server']['account_repository'] != 'ldap')
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{
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// store homedirectory for egw_session->read_repositories
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$GLOBALS['auto_create_acct'] = array();
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if (isset($allValues[0]['homedirectory']))
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{
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$GLOBALS['auto_create_acct']['homedirectory'] = $allValues[0]['homedirectory'][0];
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}
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if (!($id = $GLOBALS['egw']->accounts->name2id($username,'account_lid','u')))
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{
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// account does NOT exist, check if we should create it
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if ($GLOBALS['egw_info']['server']['auto_create_acct'])
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{
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// create a global array with all availible info about that account
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foreach(array(
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'givenname' => 'firstname',
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'sn' => 'lastname',
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'uidnumber' => 'account_id',
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'mail' => 'email',
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) as $ldap_name => $acct_name)
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{
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$GLOBALS['auto_create_acct'][$acct_name] =
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translation::convert($allValues[0][$ldap_name][0],'utf-8');
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}
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$ret = true;
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}
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else
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{
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$ret = false;
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if ($this->debug) error_log(__METHOD__."('$username',\$password) bind as user failed!");
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}
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}
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// account exists, check if it is acctive
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else
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{
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$ret = $GLOBALS['egw']->accounts->id2name($id,'account_status') == 'A';
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if ($this->debug && !$ret) error_log(__METHOD__."('$username',\$password) account NOT active!");
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}
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}
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// account-repository is ldap --> check if passwd hash migration is enabled
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elseif ($GLOBALS['egw_info']['server']['pwd_migration_allowed'] &&
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!empty($GLOBALS['egw_info']['server']['pwd_migration_types']))
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{
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// try to query password from ldap server (might fail because of ACL) and check if we need to migrate the hash
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if (($sri = ldap_search($ldap, $userDN,"(objectclass=*)", array('userPassword'))) &&
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($values = ldap_get_entries($ldap, $sri)) && isset($values[0]['userpassword'][0]) &&
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($type = preg_match('/^{(.+)}/',$values[0]['userpassword'][0],$matches) ? strtolower($matches[1]) : 'plain') &&
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// for crypt use auth::crypt_compare to detect correct sub-type, strlen("{crypt}")=7
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($type != 'crypt' || auth::crypt_compare($passwd, substr($values[0]['userpassword'][0], 7), $type)) &&
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in_array($type, explode(',',strtolower($GLOBALS['egw_info']['server']['pwd_migration_types']))))
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{
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$this->change_password($passwd, $passwd, $allValues[0]['uidnumber'][0], false);
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}
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}
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return $ret;
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}
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}
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if ($this->debug) error_log(__METHOD__."('$username','$password') dn not found or password wrong!");
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// dn not found or password wrong
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return False;
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}
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/**
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* fetch the last pwd change for the user
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*
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* @param string $username username of account to authenticate
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* @return mixed false or shadowlastchange*24*3600
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*/
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function getLastPwdChange($username)
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{
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// allow non-ascii in username & password
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$username = translation::convert($username,translation::charset(),'utf-8');
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if(!$ldap = common::ldapConnect())
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{
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return False;
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}
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/* Login with the LDAP Admin. User to find the User DN. */
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if(!@ldap_bind($ldap, $GLOBALS['egw_info']['server']['ldap_root_dn'], $GLOBALS['egw_info']['server']['ldap_root_pw']))
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{
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if ($this->debug) error_log(__METHOD__."('$username') can NOT bind with ldap_root_dn to search!");
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return false;
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}
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/* find the dn for this uid, the uid is not always in the dn */
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$attributes = array('uid','dn','shadowexpire','shadowlastchange');
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$filter = $GLOBALS['egw_info']['server']['ldap_search_filter'] ? $GLOBALS['egw_info']['server']['ldap_search_filter'] : '(uid=%user)';
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$filter = str_replace(array('%user','%domain'),array(ldap::quote($username),$GLOBALS['egw_info']['user']['domain']),$filter);
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if ($GLOBALS['egw_info']['server']['account_repository'] == 'ldap')
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{
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$filter = "(&$filter(objectclass=posixaccount))";
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}
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$sri = ldap_search($ldap, $GLOBALS['egw_info']['server']['ldap_context'], $filter, $attributes);
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$allValues = ldap_get_entries($ldap, $sri);
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if ($allValues['count'] > 0)
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{
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if (!isset($allValues[0]['shadowlastchange']))
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{
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if ($this->debug) error_log(__METHOD__."('$username') no shadowlastchange attribute!");
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return false;
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}
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if ($GLOBALS['egw_info']['server']['case_sensitive_username'] == true &&
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$allValues[0]['uid'][0] != $username)
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{
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if ($this->debug) error_log(__METHOD__."('$username') wrong case in username!");
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return false;
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}
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if ($GLOBALS['egw_info']['server']['account_repository'] == 'ldap' &&
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isset($allValues[0]['shadowexpire']) && $allValues[0]['shadowexpire'][0]*24*3600 < time())
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{
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if ($this->debug) error_log(__METHOD__."('$username',\$password) account is expired!");
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return false; // account is expired
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}
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return $allValues[0]['shadowlastchange'][0]*24*3600;
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}
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if ($this->debug) error_log(__METHOD__."('$username') dn not found or password wrong!");
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// dn not found or password wrong
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return false;
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}
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/**
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* changes account_lastpwd_change in ldap datababse
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*
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* @param int $account_id account id of user whose passwd should be changed
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* @param string $passwd must be cleartext, usually not used, but may be used to authenticate as user to do the change -> ldap
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* @param int $lastpwdchange must be a unixtimestamp
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* @return boolean true if account_lastpwd_change successful changed, false otherwise
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*/
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function setLastPwdChange($account_id=0, $passwd=NULL, $lastpwdchange=NULL)
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{
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$admin = True;
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// Don't allow password changes for other accounts when using XML-RPC
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if(!$account_id || $GLOBALS['egw_info']['flags']['currentapp'] == 'login')
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{
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$admin = False;
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$username = $GLOBALS['egw_info']['user']['account_lid'];
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}
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else
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{
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$username = translation::convert($GLOBALS['egw']->accounts->id2name($account_id),
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translation::charset(),'utf-8');
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}
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//echo "<p>auth_ldap::change_password('$old_passwd','$new_passwd',$account_id) username='$username'</p>\n";
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$filter = $GLOBALS['egw_info']['server']['ldap_search_filter'] ? $GLOBALS['egw_info']['server']['ldap_search_filter'] : '(uid=%user)';
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$filter = str_replace(array('%user','%domain'),array($username,$GLOBALS['egw_info']['user']['domain']),$filter);
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$ds = common::ldapConnect();
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$sri = ldap_search($ds, $GLOBALS['egw_info']['server']['ldap_context'], $filter);
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$allValues = ldap_get_entries($ds, $sri);
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$entry['shadowlastchange'] = (is_null($lastpwdchange) || $lastpwdchange<0 ? round((time()-date('Z')) / (24*3600)):$lastpwdchange);
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$dn = $allValues[0]['dn'];
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if(!$admin && $passwd) // if old password given (not called by admin) --> bind as that user to change the pw
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{
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$ds = common::ldapConnect('',$dn,$passwd);
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}
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if (!@ldap_modify($ds, $dn, $entry))
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{
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return false;
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}
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// using time() is sufficient to represent the current time, we do not need the timestamp written to the storage
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if (!$admin) egw_cache::setSession('phpgwapi','auth_alpwchange_val',(is_null($lastpwdchange) || $lastpwdchange<0 ? time():$lastpwdchange));
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return true;
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}
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/**
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* changes password in LDAP
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*
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* If $old_passwd is given, the password change is done binded as user and NOT with the
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* "root" dn given in the configurations.
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*
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* @param string $old_passwd must be cleartext or empty to not to be checked
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* @param string $new_passwd must be cleartext
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* @param int $account_id account id of user whose passwd should be changed
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* @param boolean $update_lastchange=true
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* @return boolean true if password successful changed, false otherwise
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*/
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function change_password($old_passwd, $new_passwd, $account_id=0, $update_lastchange=true)
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{
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if (!$account_id)
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{
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$username = $GLOBALS['egw_info']['user']['account_lid'];
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}
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else
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{
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$username = translation::convert($GLOBALS['egw']->accounts->id2name($account_id),
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translation::charset(),'utf-8');
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}
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if ($this->debug) error_log(__METHOD__."('$old_passwd','$new_passwd',$account_id, $update_lastchange) username='$username'");
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$filter = $GLOBALS['egw_info']['server']['ldap_search_filter'] ? $GLOBALS['egw_info']['server']['ldap_search_filter'] : '(uid=%user)';
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$filter = str_replace(array('%user','%domain'),array($username,$GLOBALS['egw_info']['user']['domain']),$filter);
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$ds = $ds_admin = common::ldapConnect();
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$sri = ldap_search($ds, $GLOBALS['egw_info']['server']['ldap_context'], $filter);
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$allValues = ldap_get_entries($ds, $sri);
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$entry['userpassword'] = auth::encrypt_password($new_passwd);
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if ($update_lastchange)
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{
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$entry['shadowlastchange'] = round((time()-date('Z')) / (24*3600));
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}
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$dn = $allValues[0]['dn'];
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if($old_passwd) // if old password given (not called by admin) --> bind as that user to change the pw
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{
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$user_ds = new ldap(true); // true throw exceptions in case of error
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try {
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$ds = $user_ds->ldapConnect('',$dn,$old_passwd);
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}
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catch (egw_exception_no_permission $e) {
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return false; // wrong old user password
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}
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}
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// try changing password bind as user or as admin, to cater for all sorts of ldap configuration
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// where either only user is allowed to change his password, or only admin user is allowed to
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if (!@ldap_modify($ds, $dn, $entry) && (!$old_passwd || !@ldap_modify($ds_admin, $dn, $entry)))
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{
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return false;
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}
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if($old_passwd) // if old password given (not called by admin) update the password in the session
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{
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// using time() is sufficient to represent the current time, we do not need the timestamp written to the storage
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egw_cache::setSession('phpgwapi','auth_alpwchange_val',time());
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}
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return $entry['userpassword'];
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}
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}
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