<?php /** * Name: LDAP Authenticate * Description: Authenticate a user against an LDAP directory * Version: 1.1 * Author: Mike Macgirvin <http://macgirvin.com/profile/mike> * Author: aymhce */ /** * Friendica 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. * * By default, the person must have registered with Friendica using the normal registration * procedures in order to have a Friendica user record, contact, and profile. * However, it's possible with an option to automate the creation of a Friendica basic account. * * 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 configuration options for this module may be set in the config/addon.config.php file * e.g.: * * [ldapauth] * ; ldap hostname server - required * ldap_server = host.example.com * ; dn to search users - required * ldap_searchdn = ou=users,dc=example,dc=com * ; attribute to find username - required * ldap_userattr = uid * * ; admin dn - optional - only if ldap server dont have anonymous access * ldap_binddn = cn=admin,dc=example,dc=com * ; admin password - optional - only if ldap server dont have anonymous access * ldap_bindpw = password * * ; for create Friendica account if user exist in ldap * ; required an email and a simple (beautiful) nickname on user ldap object * ; active account creation - optional - default none * ldap_autocreateaccount = true * ; attribute to get email - optional - default : 'mail' * ldap_autocreateaccount_emailattribute = mail * ; attribute to get nickname - optional - default : 'givenName' * ldap_autocreateaccount_nameattribute = cn * * ...etc. */ use Friendica\Core\Hook; use Friendica\Core\Logger; use Friendica\Database\DBA; use Friendica\DI; use Friendica\Model\User; use Friendica\Util\ConfigFileLoader; function ldapauth_install() { Hook::register('load_config', 'addon/ldapauth/ldapauth.php', 'ldapauth_load_config'); Hook::register('authenticate', 'addon/ldapauth/ldapauth.php', 'ldapauth_hook_authenticate'); } function ldapauth_load_config(\Friendica\App $a, ConfigFileLoader $loader) { $a->getConfigCache()->load($loader->loadAddonConfig('ldapauth')); } function ldapauth_hook_authenticate($a, &$b) { $user = ldapauth_authenticate($b['username'], $b['password']); if (!empty($user['uid'])) { $b['user_record'] = User::getById($user['uid']); $b['authenticated'] = 1; } } function ldapauth_authenticate($username, $password) { $ldap_server = DI::config()->get('ldapauth', 'ldap_server'); $ldap_binddn = DI::config()->get('ldapauth', 'ldap_binddn'); $ldap_bindpw = DI::config()->get('ldapauth', 'ldap_bindpw'); $ldap_searchdn = DI::config()->get('ldapauth', 'ldap_searchdn'); $ldap_userattr = DI::config()->get('ldapauth', 'ldap_userattr'); $ldap_group = DI::config()->get('ldapauth', 'ldap_group'); $ldap_autocreateaccount = DI::config()->get('ldapauth', 'ldap_autocreateaccount'); $ldap_autocreateaccount_emailattribute = DI::config()->get('ldapauth', 'ldap_autocreateaccount_emailattribute'); $ldap_autocreateaccount_nameattribute = DI::config()->get('ldapauth', 'ldap_autocreateaccount_nameattribute'); if (!extension_loaded('ldap') || !strlen($ldap_server)) { Logger::error('Addon not configured or missing php-ldap extension', ['extension_loaded' => extension_loaded('ldap'), 'server' => $ldap_server]); return false; } if (!strlen($password)) { Logger::error('Empty password disallowed', ['provided_password_length' => strlen($password)]); return false; } $connect = @ldap_connect($ldap_server); if ($connect === false) { Logger::warning('Could not connect to LDAP server', ['server' => $ldap_server]); return false; } @ldap_set_option($connect, LDAP_OPT_PROTOCOL_VERSION, 3); @ldap_set_option($connect, LDAP_OPT_REFERRALS, 0); if ((@ldap_bind($connect, $ldap_binddn, $ldap_bindpw)) === false) { Logger::warning('Could not bind to LDAP server', ['server' => $ldap_server, 'binddn' => $ldap_binddn, 'errno' => ldap_errno($connect), 'error' => ldap_error($connect)]); return false; } $res = @ldap_search($connect, $ldap_searchdn, $ldap_userattr . '=' . $username); if (!$res) { Logger::notice('LDAP user not found.', ['searchdn' => $ldap_searchdn, 'userattr' => $ldap_userattr, 'username' => $username, 'errno' => ldap_errno($connect), 'error' => ldap_error($connect)]); return false; } $id = @ldap_first_entry($connect, $res); if (!$id) { Logger::notice('Could not retrieve first LDAP entry.', ['searchdn' => $ldap_searchdn, 'userattr' => $ldap_userattr, 'username' => $username, 'errno' => ldap_errno($connect), 'error' => ldap_error($connect)]); return false; } $dn = @ldap_get_dn($connect, $id); if (!@ldap_bind($connect, $dn, $password)) { Logger::notice('Could not authenticate LDAP user with provided password', ['errno' => ldap_errno($connect), 'error' => ldap_error($connect)]); return false; } $emailarray = []; $namearray = []; if ($ldap_autocreateaccount == "true") { if (!strlen($ldap_autocreateaccount_emailattribute)) { $ldap_autocreateaccount_emailattribute = "mail"; } if (!strlen($ldap_autocreateaccount_nameattribute)) { $ldap_autocreateaccount_nameattribute = "givenName"; } $emailarray = @ldap_get_values($connect, $id, $ldap_autocreateaccount_emailattribute); $namearray = @ldap_get_values($connect, $id, $ldap_autocreateaccount_nameattribute); } if (!strlen($ldap_group)) { ldap_createaccount($ldap_autocreateaccount, $username, $password, $emailarray[0], $namearray[0]); return true; } $r = @ldap_compare($connect, $ldap_group, 'member', $dn); if ($r !== true) { $errno = @ldap_errno($connect); if ($errno === 32) { Logger::notice('LDAP Access Control Group does not exist', ['errno' => $errno, 'error' => ldap_error($connect)]); } elseif ($errno === 16) { Logger::notice('LDAP membership attribute does not exist in access control group', ['errno' => $errno, 'error' => ldap_error($connect)]); } else { Logger::notice('Unexpected LDAP error', ['errno' => $errno, 'error' => ldap_error($connect)]); } @ldap_close($connect); return false; } if ($ldap_autocreateaccount == "true" && !DBA::exists('user', ['nickname' => $username])) { return ldap_createaccount($username, $password, $emailarray[0], $namearray[0]); } try { $authentication = User::getAuthenticationInfo($username); return User::getById($authentication['uid']); } catch (Exception $e) { Logger::notice('LDAP authentication error: ' . $e->getMessage()); return false; } } function ldap_createaccount($username, $password, $email, $name) { if (!strlen($email) || !strlen($name)) { Logger::notice('Could not create local user from LDAP data, no email or nickname provided'); return false; } try { $user = User::create([ 'username' => $name, 'nickname' => $username, 'email' => $email, 'password' => $password, 'verified' => 1 ]); Logger::info('Local user created from LDAP data', ['username' => $username, 'name' => $name]); return $user; } catch (Exception $ex) { Logger::error('Could not create local user from LDAP data', ['username' => $username, 'exception' => $ex->getMessage()]); } return false; }