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