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|
<?php
/**
* Friendika addon
*
* Module: LDAP Authenticate
*
* Authenticate a user against an LDAP directory
* Useful for Windows Active Directory and other LDAP-based organisations
* to maintain a single password across the organisation.
*
* Optionally authenticates only if a member of a given group in the directory.
*
* The person must have registered with Friendika using the normal registration
* procedures in order to have a Friendika user record, contact, and profile.
*
* Note when using with Windows Active Directory: you may need to set TLS_CACERT in your site
* ldap.conf file to the signing cert for your LDAP server.
*
* The required configuration options for this module may be set in the .htconfig.php file
* e.g.:
*
* $a->config['ldapauth']['ldap_server'] = 'host.example.com';
* ...etc.
*
*/
function ldapauth_install() {
register_hook('authenticate', 'addon/ldapauth/ldapauth.php', 'ldapauth_hook_authenticate');
}
function ldapauth_uninstall() {
unregister_hook('authenticate', 'addon/ldapauth/ldapauth.php', 'ldapauth_hook_authenticate');
}
function ldapauth_hook_authenticate($a,&$b) {
if(ldapauth_authenticate($b['username'],$b['password'])) {
$results = q("SELECT * FROM `user` WHERE `nickname` = '%s' AND `blocked` = 0 AND `verified` = 1 LIMIT 1",
dbesc($b['username'])
);
if(count($results)) {
$b['user_record'] = $results[0];
$b['authenticated'] = 1;
}
}
return;
}
function ldapauth_authenticate($username,$password) {
$ldap_server = get_config('ldapauth','ldap_server');
$ldap_binddn = get_config('ldapauth','ldap_binddn');
$ldap_bindpw = get_config('ldapauth','ldap_bindpw');
$ldap_searchdn = get_config('ldapauth','ldap_searchdn');
$ldap_userattr = get_config('ldapauth','ldap_userattr');
$ldap_group = get_config('ldapauth','ldap_group');
if(! ((strlen($password))
&& (function_exists('ldap_connect'))
&& (strlen($ldap_server))))
return false;
$connect = @ldap_connect($ldap_server);
if(! $connect)
return false;
@ldap_set_option($connect, LDAP_OPT_PROTOCOL_VERSION,3);
@ldap_set_option($connect, LDAP_OPT_REFERRALS, 0);
if((@ldap_bind($connect,$ldap_binddn,$ldap_bindpw)) === false) {
return false;
}
$res = @ldap_search($connect,$ldap_searchdn, $ldap_userattr . '=' . $username);
if(! $res) {
return false;
}
$id = @ldap_first_entry($connect,$res);
if(! $id) {
return false;
}
$dn = @ldap_get_dn($connect,$id);
if(! @ldap_bind($connect,$dn,$password))
return false;
if(! strlen($ldap_group))
return true;
$r = @ldap_compare($connect,$ldap_group,'member',$dn);
if ($r === -1) {
$err = @ldap_error($connect);
$eno = @ldap_errno($connect);
@ldap_close($connect);
if ($eno === 32) {
logger("ldapauth: access control group Does Not Exist");
return false;
}
elseif ($eno === 16) {
logger('ldapauth: membership attribute does not exist in access control group');
return false;
}
else {
logger('ldapauth: error: ' . $err);
return false;
}
}
elseif ($r === false) {
@ldap_close($connect);
return false;
}
return true;
}
|
