function ldap_sso_user_login_sso in Lightweight Directory Access Protocol (LDAP) 8.2

A proxy function for the actual authentication routine. This is in place so various implementations of grabbing NTLM credentials can be used and selected from an administration page. This is the real gatekeeper since this assumes that any NTLM authentication from the underlying web server is good enough, and only checks that there are values in place for the user name, and anything else that is set for a particular implementation. In the case that there are no credentials set by the underlying web server, the user is redirected to the normal user login form.

Return value

false

1 string reference to 'ldap_sso_user_login_sso'

ldap_sso_menu in ldap_sso/ldap_sso.module

Implements hook_menu().

File

ldap_sso/ldap_sso.module, line 163

This module injects itself into Drupal's Authentication stack.

Code

function ldap_sso_user_login_sso() {
  $detailed_watchdog_log = config('ldap_help.settings')
    ->get('watchdog_detail');
  $auth_conf = ldap_authentication_get_valid_conf();
  $implementation = $auth_conf->ldapImplementation;

  //$enabled = $auth_conf->ssoEnabled; // this is redundant since hook won't be called if ldap_sso isn't enabled.
  if ($detailed_watchdog_log) {
    $watchdog_tokens = array(
      '!implementation' => $auth_conf->ldapImplementation,
      '!enabled' => $auth_conf->ssoEnabled,
      '!server_remote_user' => @$_SERVER['REMOTE_USER'],
      '!server_redirect_remote_user' => @$_SERVER['REDIRECT_REMOTE_USER'],
      '!ssoRemoteUserStripDomainName' => $auth_conf->ssoRemoteUserStripDomainName,
      '!seamlessLogin' => $auth_conf->seamlessLogin,
    );
    watchdog('ldap_sso', 'ldap_sso_user_login_sso.step1: implementation: !implementation, enabled: !enabled, server_remote_user: !server_remote_user, server_redirect_remote_user: !server_redirect_remote_user, ssoRemoteUserStripDomainName: !ssoRemoteUserStripDomainName,seamlessLogin: !seamlessLogin', $watchdog_tokens, WATCHDOG_DEBUG);
  }

  //if ($enabled != TRUE) {  // this is redundant as well as problematic.  if ldap_sso is disabled, no need to redirect to user/login

  //  drupal_goto('user/login');

  //}
  $remote_user = NULL;
  $realm = NULL;
  $domain = NULL;
  switch ($implementation) {
    case 'mod_auth_sspi':
      $remote_user = FALSE;
      if (isset($_SERVER['REMOTE_USER'])) {
        $remote_user = $_SERVER['REMOTE_USER'];
      }
      elseif (isset($_SERVER['REDIRECT_REMOTE_USER'])) {
        $remote_user = $_SERVER['REDIRECT_REMOTE_USER'];
      }
      break;
    case 'mod_auth_kerb':
      $remote_user = FALSE;
      if (isset($_SERVER['REMOTE_USER'])) {
        $remote_user = $_SERVER['REMOTE_USER'];
      }
      elseif (isset($_SERVER['REDIRECT_REMOTE_USER'])) {
        $remote_user = $_SERVER['REDIRECT_REMOTE_USER'];
      }
      if ($remote_user && preg_match('/^([A-Za-z0-9_\\-\\.]+)@([A-Za-z0-9_\\-.]+)$/', $remote_user, $matches)) {
        $remote_user = $matches[1];
        $realm = $matches[2];

        // This can be used later if realms is ever supported properly
      }
      break;
  }
  if ($detailed_watchdog_log) {
    $watchdog_tokens['!remote_user'] = $remote_user;
    $watchdog_tokens['!realm'] = $realm;
    watchdog('ldap_authentication', 'ldap_sso_user_login_sso.implementation: username=!remote_user, (realm=!realm) found', $watchdog_tokens, WATCHDOG_DEBUG);
  }
  if ($remote_user) {
    if ($auth_conf->ssoRemoteUserStripDomainName) {

      // might be in form <remote_user>@<domain> or <domain>\<remote_user>
      $domain = NULL;
      $exploded = preg_split('/[\\@\\\\]/', $remote_user);
      if (count($exploded) == 2) {
        if (strpos($remote_user, '@') !== FALSE) {
          $remote_user = $exploded[0];
          $domain = $exploded[1];
        }
        else {
          $domain = $exploded[0];
          $remote_user = $exploded[1];
        }
        if ($detailed_watchdog_log) {
          $watchdog_tokens['!remote_user'] = $remote_user;
          $watchdog_tokens['!domain'] = $domain;
          watchdog('ldap_authentication', 'ldap_sso_user_login_sso.stripdomain: remote_user=!remote_user, domain=!domain', $watchdog_tokens, WATCHDOG_DEBUG);
        }
      }
    }
    if ($detailed_watchdog_log) {
      $watchdog_tokens['!remote_user'] = $remote_user;
      $watchdog_tokens['!realm'] = $realm;
      $watchdog_tokens['!domain'] = $domain;
      watchdog('ldap_authentication', 'ldap_sso_user_login_sso.remote_user: username=!remote_user, (realm=!realm, domain=!domain) found', $watchdog_tokens, WATCHDOG_DEBUG);
    }
    $fake_form_state = array(
      'values' => array(
        'name' => check_plain($remote_user),
        'pass' => user_password(20),
      ),
      'sso_login' => TRUE,
    );
    $user = ldap_authentication_user_login_authenticate_validate(array(), $fake_form_state, TRUE);
    if ($detailed_watchdog_log) {
      $watchdog_tokens['!uid'] = is_object($user) ? $user->uid : NULL;
      watchdog('ldap_authentication', 'ldap_sso_user_login_sso.remote_user: uid of user=!uid', $watchdog_tokens, WATCHDOG_DEBUG);
    }
    if ($user && $user->uid > 0) {
      if ($auth_conf->seamlessLogin == 1) {
        if ($detailed_watchdog_log) {
          watchdog('ldap_authentication', 'ldap_sso_user_login_sso.remote_user.user_success.seemlessLogin', $watchdog_tokens, WATCHDOG_DEBUG);
        }
        setcookie("seamless_login", 'auto login', time() + $auth_conf->cookieExpire, base_path(), "");
        $_SESSION['seamless_login'] = 'auto login';
        setcookie("seamless_login_attempted", '');
        unset($_SESSION['seamless_login_attempted']);
      }
      drupal_set_message(theme('ldap_authentication_login_message', array(
        'message' => t('You have been successfully authenticated'),
      )));
      if ($detailed_watchdog_log) {
        watchdog('ldap_authentication', 'ldap_sso_user_login_sso.remote_user.user_success.drupal_goto front', $watchdog_tokens, WATCHDOG_DEBUG);
      }
      drupal_goto('<front>');
    }
    else {
      if ($auth_conf->seamlessLogin == 1) {
        if ($detailed_watchdog_log) {
          watchdog('ldap_authentication', 'ldap_sso_user_login_sso.remote_user.user_fail.seamlessLogin', $watchdog_tokens, WATCHDOG_DEBUG);
        }
        setcookie("seamless_login", 'do not auto login', time() + $auth_conf->cookieExpire, base_path(), "");
        $_SESSION['seamless_login'] = 'do not auto login';
      }
      drupal_set_message(theme('ldap_authentication_message_not_found', array(
        'message' => t('Sorry, your LDAP credentials were not found, ' . 'or the LDAP server is not available. You may log in ' . 'with other credentials on the !user_login_form.', array(
          '!user_login_form' => l(t('user login form'), 'user/login'),
        )),
      )), 'error');
      if ($detailed_watchdog_log) {
        watchdog('ldap_authentication', 'ldap_sso_user_login_sso.remote_user.user_fail.drupal_goto user/logint', $watchdog_tokens, WATCHDOG_DEBUG);
      }
      drupal_goto('user/login');
    }
  }
  else {
    watchdog('ldap_authentication', '$_SERVER[\'REMOTE_USER\'] not found', array(), WATCHDOG_DEBUG);
    if ($auth_conf->seamlessLogin == 1) {
      setcookie("seamless_login", 'do not auto login', time() + $auth_conf->cookieExpire, base_path(), "");
      $_SESSION['seamless_login'] = 'do not auto login';
      if ($detailed_watchdog_log) {
        watchdog('ldap_authentication', 'ldap_sso_user_login_sso.no_remote_user.seamlessLogin', $watchdog_tokens, WATCHDOG_DEBUG);
      }
    }
    drupal_set_message(theme('ldap_authentication_message_not_authenticated', array(
      'message' => t('You were not authenticated by the server.
      You may log in with your credentials below.'),
    )), 'error');
    if ($detailed_watchdog_log) {
      watchdog('ldap_authentication', 'ldap_sso_user_login_sso.no_remote_user.drupal_goto user/login', $watchdog_tokens, WATCHDOG_DEBUG);
    }
    drupal_goto('user/login');
  }
}