function tfa_form_alter in Two-factor Authentication (TFA) 7.2

Implements hook_form_alter().

File

./tfa.module, line 231

Two-factor authentication for Drupal.

Code

function tfa_form_alter(&$form, &$form_state, $form_id) {
  switch ($form_id) {
    case 'user_login':
    case 'user_login_block':
      if (variable_get('tfa_enabled', 0)) {

        // Replace Drupal's login submit handler with TFA to check if
        // authentication should be interrupted and user redirected to TFA form.
        // Replacing user_login_submit() in its position allows other form_alter
        // handlers to run after. However, the user must be redirected to the
        // TFA form so the last handler in the order must be
        // tfa_login_form_redirect(). Other modules may alter the tfa_redirect
        // options element as needed to set the destination after TFA.
        $key = array_search('user_login_submit', $form['#submit']);
        $form['#submit'][$key] = 'tfa_login_submit';
        $form['#submit'][] = 'tfa_login_form_redirect';
      }
      break;
  }
}