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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Special admin setting for auth_ldap that validates ntlm usernames.
  19   *
  20   * @package    auth_ldap
  21   * @copyright  2017 Stephen Bourget
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  defined('MOODLE_INTERNAL') || die();
  26  
  27  /**
  28   * Special admin setting for auth_ldap that validates ntlm usernames.
  29   *
  30   * @package    auth_ldap
  31   * @copyright  2017 Stephen Bourget
  32   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  33   */
  34  class auth_ldap_admin_setting_special_ntlm_configtext extends admin_setting_configtext {
  35  
  36      /**
  37       * We need to validate the username format when using NTLM.
  38       *
  39       * @param string $data Form data.
  40       * @return string Empty when no errors.
  41       */
  42      public function validate($data) {
  43  
  44          if (get_config('auth_ldap', 'ntlmsso_type') === 'ntlm') {
  45              $format = trim($data);
  46              if (!empty($format) && !preg_match('/%username%/i', $format)) {
  47                  return get_string('auth_ntlmsso_missing_username', 'auth_ldap');
  48              }
  49          }
  50  
  51          return parent::validate($data);
  52      }
  53  }