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<?php
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// $Id: ldapauth.module,v 1.45 2009/07/28 14:03:05 miglius Exp $
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/**
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* @file
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* ldapauth provides authentication against ldap server.
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*/
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//////////////////////////////////////////////////////////////////////////////
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define('LDAPAUTH_AUTH_MIXED', 0);
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define('LDAPAUTH_AUTH_EXCLUSIVED', 1);
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define('LDAPAUTH_CONFLICT_LOG', 0);
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define('LDAPAUTH_CONFLICT_RESOLVE', 1);
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define('LDAPAUTH_EMAIL_FIELD_NO', 0);
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define('LDAPAUTH_EMAIL_FIELD_REMOVE', 1);
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define('LDAPAUTH_EMAIL_FIELD_DISABLE', 2);
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define('LDAPAUTH_PROFILE', 'LDAP authentication');
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define('LDAPAUTH_PROFILE_WEIGHT', 4);
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define('LDAPAUTH_LOGIN_PROCESS', variable_get('ldapauth_login_process', LDAPAUTH_AUTH_MIXED));
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define('LDAPAUTH_LOGIN_CONFLICT', variable_get('ldapauth_login_conflict', LDAPAUTH_CONFLICT_LOG));
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define('LDAPAUTH_FORGET_PASSWORDS', variable_get('ldapauth_forget_passwords', TRUE));
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define('LDAPAUTH_SYNC_PASSWORDS', variable_get('ldapauth_sync_passwords', FALSE));
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define('LDAPAUTH_DISABLE_PASS_CHANGE', variable_get('ldapauth_disable_pass_change', FALSE));
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define('LDAPAUTH_ALTER_EMAIL_FIELD', variable_get('ldapauth_alter_email_field', LDAPAUTH_EMAIL_FIELD_NO));
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define('LDAPAUTH_DEFAULT_USER_ATTR', variable_get('ldapauth_default_user_attr', 'uid'));
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define('LDAPAUTH_DEFAULT_MAIL_ATTR', variable_get('ldapauth_default_mail_attr', 'mail'));
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//////////////////////////////////////////////////////////////////////////////
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// Core API hooks
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/**
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* Implements hook_init().
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*/
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function ldapauth_init() {
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require_once(drupal_get_path('module', 'ldapauth') .'/includes/LDAPInterface.inc');
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}
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/**
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* Implementation of hook_help().
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*/
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function ldapauth_help($path, $arg) {
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switch ($path) {
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case 'admin/settings/ldapauth':
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return '<p>'. t('A system wide settings will affect all configured LDAP servers.') .'</p>';
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}
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}
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/**
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* Implements hook_menu().
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*/
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function ldapauth_menu() {
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return array(
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'admin/settings/ldap' => array(
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'title' => 'LDAP',
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'description' => 'Configure LDAP integration settings.',
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'page callback' => 'ldapauth_admin_menu_block_page',
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'access arguments' => array('administer ldap modules'),
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'file' => 'ldapauth.admin.inc',
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),
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'admin/settings/ldap/ldapauth' => array(
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'title' => 'Authentication',
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'description' => 'Configure LDAP authentication settings.',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('ldapauth_admin_settings'),
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'access arguments' => array('administer ldap modules'),
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'file' => 'ldapauth.admin.inc',
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),
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'admin/settings/ldap/ldapauth/configure' => array(
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'title' => 'Settings',
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'type' => MENU_DEFAULT_LOCAL_TASK,
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),
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'admin/settings/ldap/ldapauth/list' => array(
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'title' => 'List',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('ldapauth_admin_list'),
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'type' => MENU_LOCAL_TASK,
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'weight' => 1,
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'access arguments' => array('administer ldap modules'),
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'file' => 'ldapauth.admin.inc',
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),
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'admin/settings/ldap/ldapauth/add' => array(
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'title' => 'Add Server',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('ldapauth_admin_form', 4),
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'type' => MENU_LOCAL_TASK,
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'weight' => 2,
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'access arguments' => array('administer ldap modules'),
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'file' => 'ldapauth.admin.inc',
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),
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'admin/settings/ldap/ldapauth/edit' => array(
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'title' => 'Configure LDAP Server',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('ldapauth_admin_form', 4, 5),
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'type' => MENU_CALLBACK,
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'access arguments' => array('administer ldap modules'),
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'file' => 'ldapauth.admin.inc',
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),
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'admin/settings/ldap/ldapauth/edit/%/test' => array(
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'title' => 'Test LDAP Server',
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'page callback' => '_ldapauth_ajax_test',
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'page arguments' => array(5),
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'type' => MENU_CALLBACK,
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'access arguments' => array('administer ldap modules'),
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'file' => 'ldapauth.admin.inc',
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),
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'admin/settings/ldap/ldapauth/delete' => array(
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'title' => 'Delete LDAP Server',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('ldapauth_admin_delete', 5),
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'type' => MENU_CALLBACK,
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'access arguments' => array('administer ldap modules'),
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'file' => 'ldapauth.admin.inc',
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),
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'admin/settings/ldap/ldapauth/activate' => array(
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'title' => 'Activate LDAP Source',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('ldapauth_admin_activate'),
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'access arguments' => array('administer ldap modules'),
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'type' => MENU_CALLBACK,
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'file' => 'ldapauth.admin.inc',
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),
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'admin/settings/ldap/ldapauth/deactivate' => array(
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'title' => 'De-activate LDAP Source',
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'page callback' => 'drupal_get_form',
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'page arguments' => array('ldapauth_admin_deactivate'),
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'access arguments' => array('administer ldap modules'),
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'type' => MENU_CALLBACK,
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'file' => 'ldapauth.admin.inc',
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),
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);
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}
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/**
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* Implements hook_theme().
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*/
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function ldapauth_theme() {
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return array(
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'ldapauth_admin_list' => array(
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'arguments' => array('form' => NULL),
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'file' => 'ldapauth.theme.inc'
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),
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);
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}
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/**
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* Implements hook_user().
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*/
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function ldapauth_user($op, &$edit, &$account, $category = NULL) {
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switch ($op) {
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case 'update':
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if ($category == 'account') {
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// If authentication is being done in "LDAP only" mode, passwords
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// should not be written to the database, or users would be able
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// to log in even after removing their LDAP entry.
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if (isset($account->ldap_authentified) && (LDAPAUTH_LOGIN_PROCESS == LDAPAUTH_AUTH_EXCLUSIVED || !LDAPAUTH_SYNC_PASSWORDS))
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$edit['pass'] = NULL;
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}
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if (LDAPAUTH_ALTER_EMAIL_FIELD == LDAPAUTH_EMAIL_FIELD_REMOVE)
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unset($edit['mail']);
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break;
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case 'view':
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if (user_access('administer users') && isset($account->ldap_authentified) && $account->ldap_dn) {
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$row = db_fetch_object(db_query("SELECT * FROM {ldapauth} WHERE sid = %d", $account->ldap_config));
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$account->content[t(LDAPAUTH_PROFILE)] = array(
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'#type' => 'user_profile_category',
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'#title' => t(LDAPAUTH_PROFILE),
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'#attributes' => array('class' => 'ldapauth-entry'),
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'#weight' => LDAPAUTH_PROFILE_WEIGHT,
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'ldap_server' => array('#type' => 'user_profile_item', '#title' => t('LDAP server'), '#value' => l($row->name, 'admin/settings/ldap/ldapauth/edit/'. $row->sid), '#weight' => 0),
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'ldap_dn' => array('#type' => 'user_profile_item', '#title' => t('LDAP dn'), '#value' => $account->ldap_dn, '#weight' => 1),
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);
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}
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break;
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}
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}
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/**
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* Implementation of hook_menu_alter().
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*/
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function ldapauth_menu_alter(&$callbacks) {
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if (variable_get('ldapauth_disable_pass_change', FALSE))
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unset($callbacks['user/password']);
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}
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/**
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* Implements hook_perm().
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*/
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function ldapauth_perm() {
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return array('administer ldap modules');
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}
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/**
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* Implements hook_form_alter().
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*/
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function ldapauth_form_alter(&$form, $form_state, $form_id) {
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global $user;
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// Replace the drupal authenticate function is it's used as validation.
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if (isset($form['#validate']) && is_array($form['#validate']) && ($key = array_search('user_login_authenticate_validate', $form['#validate'])))
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$form['#validate'][$key] = 'ldapauth_login_authenticate_validate';
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switch ($form_id) {
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case 'user_login_block':
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if (LDAPAUTH_DISABLE_PASS_CHANGE)
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unset($form['links']);
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break;
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case 'user_profile_form':
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$account = $form["_account"]["#value"];
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if ($user->uid != 1 && isset($account->ldap_authentified)) {
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if (LDAPAUTH_DISABLE_PASS_CHANGE)
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unset($form['account']['pass']);
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switch (LDAPAUTH_ALTER_EMAIL_FIELD) {
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case LDAPAUTH_EMAIL_FIELD_REMOVE :
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$form['account']['mail']['#type'] = 'hidden';
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$form['account']['mail']['#attributes']['READONLY'] = 'READONLY';
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break;
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case LDAPAUTH_EMAIL_FIELD_DISABLE :
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$form['account']['mail']['#attributes']['READONLY'] = 'READONLY';
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break;
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}
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// Remove fieldset if empty.
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if (isset($form['account']) && !isset($form['account']['pass']) && $form['account']['mail']['#type'] == 'hidden' && count(array_filter($form['account'], create_function('$a', 'return is_array($a) ? TRUE : FALSE;'))) == 1) {
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$form['mail'] = $form['account']['mail'];
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unset($form['account']);
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}
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}
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break;
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}
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}
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/**
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* Implements hook_cron().
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*/
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function ldapauth_cron() {
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cache_clear_all(NULL, 'cache_filter');
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}
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/**
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* Implements hook_exit().
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*/
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function ldapauth_exit() {
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// We delete the login info here, instead of just not storing it at
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// _ldapauth_auth(), so at least ldapgroups can use it at login time.
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if (LDAPAUTH_FORGET_PASSWORDS && isset($_SESSION['ldap_login'])) {
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unset($_SESSION['ldap_login']);
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}
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}
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//////////////////////////////////////////////////////////////////////////////
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// Login process functions
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/**
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* Main user validation function.
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*
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* If successful, sets the global $user object.
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*/
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function ldapauth_login_authenticate_validate($form, &$form_state) {
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ldapauth_authenticate($form_state['values']);
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}
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/**
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* Main user authentication function.
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*
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* If successful, sets the global $user object.
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*/
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function ldapauth_authenticate($form_values = array()) {
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global $user, $_ldapauth_ldap;
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$name = $form_values['name'];
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$pass = trim($form_values['pass']);
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// The user_login_name_validate() is not called if the user is being authenticated
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// from the httpauth or services modules, therefore call it here.
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$form_state['values'] = $form_values;
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user_login_name_validate(NULL, $form_state);
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// (Design decision) uid=1 (admin user) must always authenticate to local database
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// this user is critical for all drupal admin and upgrade operations so it is best
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// left with drupal's native authentication.
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$result = db_query("SELECT uid FROM {users} WHERE name = '%s' AND uid = '1'", $name);
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if ($account = db_fetch_object($result)) {
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user_authenticate($form_values);
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return;
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}
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if (LDAPAUTH_LOGIN_PROCESS == LDAPAUTH_AUTH_MIXED) {
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// Authenticate local users first.
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$result = db_query("SELECT name, data FROM {users} WHERE name='%s'", $name);
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if ($row = db_fetch_array($result)) {
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$data = unserialize($row['data']);
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if (!isset($data['ldap_authentified']) || $data['ldap_authentified'] == 0) {
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// A local user with same name exists - authenticate that user.
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if (user_authenticate($form_values)) {
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// Nullify global ldap resource for good measure.
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unset($_ldapauth_ldap);
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return;
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}
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}
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}
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}
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$account = user_load(array('name' => $name, 'status' => 1));
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if ($account && drupal_is_denied('mail', $account->mail)) {
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form_set_error('name', t('The name %name is registered using a reserved e-mail address and therefore could not be logged in.', array('%name' => $account->name)));
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}
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// If there is any validations errors, we do not query LDAP.
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if (form_get_errors())
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return;
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// Authenticate LDAP user.
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| 318 |
if (!($dn = _ldapauth_auth($name, $pass)))
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return;
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|
| 321 |
if (!$account) {
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// Register this new user.
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| 323 |
if ($ldap_user = _ldapauth_user_lookup($name)) {
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// If mail attribute is missing, set the name as mail.
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$init = $mail = key_exists(($_ldapauth_ldap->getOption('mail_attr') ? $_ldapauth_ldap->getOption('mail_attr') : LDAPAUTH_DEFAULT_MAIL_ATTR), $ldap_user) ? $ldap_user[$_ldapauth_ldap->getOption('mail_attr')][0] : $name;
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| 327 |
// Check if the e-mail is not denied.
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| 328 |
if (drupal_is_denied('mail', $mail)) {
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| 329 |
form_set_error('name', t('The name %name is registered using a reserved e-mail address and therefore could not be logged in.', array('%name' => $name)));
|
| 330 |
return;
|
| 331 |
}
|
| 332 |
|
| 333 |
// Generate a random drupal password. LDAP password will be used anyways.
|
| 334 |
$pass_new = (LDAPAUTH_LOGIN_PROCESS == LDAPAUTH_AUTH_EXCLUSIVED || !LDAPAUTH_SYNC_PASSWORDS) ? user_password(20) : $pass;
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| 335 |
|
| 336 |
$userinfo = array('name' => $name, 'pass' => $pass_new, 'mail' => $mail, 'init' => $init, 'status' => 1, 'authname_ldapauth' => $name, 'ldap_authentified' => TRUE, 'ldap_dn' => $ldap_user['dn'], 'ldap_config' => $_ldapauth_ldap->getOption('sid'));
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| 337 |
$user = user_save('', $userinfo);
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watchdog('ldapauth', 'New external user %name created from the LDAP server %server.', array('%name' => $name, '%server' => $_ldapauth_ldap->getOption('name')), WATCHDOG_NOTICE, l(t('edit'), 'user/'. $user->uid .'/edit'));
|
| 339 |
}
|
| 340 |
}
|
| 341 |
else {
|
| 342 |
// Login existing user.
|
| 343 |
$data = array(
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| 344 |
'ldap_dn' => $dn,
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| 345 |
'ldap_config' => $_ldapauth_ldap->getOption('sid'),
|
| 346 |
);
|
| 347 |
|
| 348 |
if (!isset($account->ldap_authentified)) {
|
| 349 |
// LDAP and local user conflict.
|
| 350 |
if (LDAPAUTH_LOGIN_CONFLICT == LDAPAUTH_CONFLICT_LOG) {
|
| 351 |
watchdog('ldapauth', 'LDAP user with DN %dn has a naming conflict with a local drupal user %name', array('%dn' => $dn, '%name' => $account->name), WATCHDOG_ERROR);
|
| 352 |
drupal_set_message(t('Another user already exists in the system with the same login name. You should contact the system administrator in order to solve this conflict.'), 'error');
|
| 353 |
return;
|
| 354 |
}
|
| 355 |
else {
|
| 356 |
$data['ldap_authentified'] = TRUE;
|
| 357 |
$data['authname_ldapauth'] = $name;
|
| 358 |
}
|
| 359 |
}
|
| 360 |
|
| 361 |
// Successfull login.
|
| 362 |
// Save the new login data.
|
| 363 |
if (LDAPAUTH_LOGIN_PROCESS == LDAPAUTH_AUTH_MIXED && LDAPAUTH_SYNC_PASSWORDS)
|
| 364 |
$data['pass'] = $pass;
|
| 365 |
$user = user_save($account, $data);
|
| 366 |
}
|
| 367 |
|
| 368 |
// Save user's authentication data to the session.
|
| 369 |
$_SESSION['ldap_login']['dn'] = $dn;
|
| 370 |
$_SESSION['ldap_login']['pass'] = $pass;
|
| 371 |
|
| 372 |
user_authenticate_finalize($form_values);
|
| 373 |
return $user;
|
| 374 |
}
|
| 375 |
|
| 376 |
/**
|
| 377 |
* Authenticate the user against LDAP server.
|
| 378 |
*
|
| 379 |
* @param $name
|
| 380 |
* A username.
|
| 381 |
* @param $pass
|
| 382 |
* A password.
|
| 383 |
*
|
| 384 |
* @return
|
| 385 |
* User's LDAP dn success, FALSE otherwise.
|
| 386 |
*/
|
| 387 |
function _ldapauth_auth($name, $pass) {
|
| 388 |
global $_ldapauth_ldap;
|
| 389 |
|
| 390 |
// Don't allow empty passwords because they cause problems on some setups.
|
| 391 |
// http://drupal.org/node/87831
|
| 392 |
if (empty($pass))
|
| 393 |
return FALSE;
|
| 394 |
|
| 395 |
// Cycle through LDAP configurations. First one to succeed wins.
|
| 396 |
$result = db_query("SELECT sid FROM {ldapauth} WHERE status = 1 ORDER BY weight");
|
| 397 |
while ($row = db_fetch_object($result)) {
|
| 398 |
|
| 399 |
// Initialize LDAP.
|
| 400 |
if (!_ldapauth_init($row->sid))
|
| 401 |
return FALSE;
|
| 402 |
|
| 403 |
// Look up the user in LDAP.
|
| 404 |
if (!($ldap = _ldapauth_user_lookup($name)) || !isset($ldap['dn']))
|
| 405 |
continue;
|
| 406 |
|
| 407 |
// Filter users based on their LDAP data.
|
| 408 |
if (($code = _ldapauth_ldap_info($row->sid, 'filter_php')) && !eval($code))
|
| 409 |
continue;
|
| 410 |
|
| 411 |
// Try to authenticate.
|
| 412 |
if (!$_ldapauth_ldap->connect($ldap['dn'], $pass))
|
| 413 |
continue;
|
| 414 |
|
| 415 |
return $ldap['dn'];
|
| 416 |
}
|
| 417 |
return FALSE;
|
| 418 |
}
|
| 419 |
|
| 420 |
/**
|
| 421 |
* Queries LDAP server for the user.
|
| 422 |
*
|
| 423 |
* @param $name
|
| 424 |
* A login name.
|
| 425 |
*
|
| 426 |
* @return
|
| 427 |
* An array with user's LDAP data or NULL if not found.
|
| 428 |
*/
|
| 429 |
function _ldapauth_user_lookup($name) {
|
| 430 |
global $_ldapauth_ldap;
|
| 431 |
|
| 432 |
if (!$_ldapauth_ldap)
|
| 433 |
return;
|
| 434 |
|
| 435 |
// Transform login name.
|
| 436 |
$login_name = ($code = _ldapauth_ldap_info($_ldapauth_ldap->getOption('sid'), 'login_php')) ? eval($code) : $name;
|
| 437 |
|
| 438 |
// If there is no bindn and bindpw - the connect will be an anonymous connect.
|
| 439 |
$_ldapauth_ldap->connect($_ldapauth_ldap->getOption('binddn'), $_ldapauth_ldap->getOption('bindpw'));
|
| 440 |
foreach (explode("\r\n", $_ldapauth_ldap->getOption('basedn')) as $base_dn) {
|
| 441 |
if (empty($base_dn))
|
| 442 |
continue;
|
| 443 |
|
| 444 |
$name_attr = $_ldapauth_ldap->getOption('user_attr') ? $_ldapauth_ldap->getOption('user_attr') : LDAPAUTH_DEFAULT_USER_ATTR;
|
| 445 |
$filter = $name_attr .'='. $login_name;
|
| 446 |
$result = $_ldapauth_ldap->search($base_dn, $filter);
|
| 447 |
if (!$result)
|
| 448 |
continue;
|
| 449 |
|
| 450 |
$num_matches = $result['count'];
|
| 451 |
// Must find exactly one user for authentication to.
|
| 452 |
if ($num_matches != 1) {
|
| 453 |
watchdog('ldapauth', "Error: %num_matches users found with $%filter under %base_dn.", array('%num_matches' => $num_matches, '%filter' => $filter, '%base_dn' => $base_dn), WATCHDOG_ERROR);
|
| 454 |
continue;
|
| 455 |
}
|
| 456 |
$match = $result[0];
|
| 457 |
|
| 458 |
// These lines serve to fix the attribute name in case a
|
| 459 |
// naughty server (i.e.: MS Active Directory) is messing the
|
| 460 |
// characters' case.
|
| 461 |
// This was contributed by Dan "Gribnif" Wilga, and described
|
| 462 |
// here: http://drupal.org/node/87833
|
| 463 |
if (!isset($match[$name_attr][0])) {
|
| 464 |
$name_attr = drupal_strtolower($name_attr);
|
| 465 |
if (!isset($match[$name_attr][0]))
|
| 466 |
continue;
|
| 467 |
}
|
| 468 |
// Finally, we must filter out results with spaces added before
|
| 469 |
// or after, which are considered OK by LDAP but are no good for us
|
| 470 |
// We allow lettercase independence, as requested by Marc Galera
|
| 471 |
// on http://drupal.org/node/97728
|
| 472 |
//
|
| 473 |
// Some setups have multiple $name_attr per entry, as pointed out by
|
| 474 |
// Clarence "sparr" Risher on http://drupal.org/node/102008, so we
|
| 475 |
// loop through all possible options.
|
| 476 |
foreach ($match[$name_attr] as $value) {
|
| 477 |
if (drupal_strtolower(trim($value)) == drupal_strtolower($login_name))
|
| 478 |
return $match;
|
| 479 |
}
|
| 480 |
}
|
| 481 |
}
|
| 482 |
|
| 483 |
//////////////////////////////////////////////////////////////////////////////
|
| 484 |
// Auxiliary functions
|
| 485 |
|
| 486 |
/**
|
| 487 |
* Initiates the LDAPInterfase class.
|
| 488 |
*
|
| 489 |
* @param $sid
|
| 490 |
* An ID of the LDAP server configuration or user object.
|
| 491 |
*
|
| 492 |
* @return
|
| 493 |
*/
|
| 494 |
function _ldapauth_init($sid) {
|
| 495 |
global $_ldapauth_ldap;
|
| 496 |
|
| 497 |
if (!($sid = is_object($sid) ? (isset($sid->ldap_config) ? $sid->ldap_config : NULL) : $sid))
|
| 498 |
return;
|
| 499 |
|
| 500 |
static $servers = array();
|
| 501 |
if (!isset($servers[$sid]))
|
| 502 |
$servers[$sid] = db_fetch_object(db_query("SELECT * FROM {ldapauth} WHERE status = 1 AND sid = %d", $sid));
|
| 503 |
|
| 504 |
if ($servers[$sid]) {
|
| 505 |
$_ldapauth_ldap = new LDAPInterface();
|
| 506 |
$_ldapauth_ldap->setOption('sid', $sid);
|
| 507 |
$_ldapauth_ldap->setOption('name', $servers[$sid]->name);
|
| 508 |
$_ldapauth_ldap->setOption('server', $servers[$sid]->server);
|
| 509 |
$_ldapauth_ldap->setOption('port', $servers[$sid]->port);
|
| 510 |
$_ldapauth_ldap->setOption('tls', $servers[$sid]->tls);
|
| 511 |
$_ldapauth_ldap->setOption('encrypted', $servers[$sid]->encrypted);
|
| 512 |
$_ldapauth_ldap->setOption('basedn', $servers[$sid]->basedn);
|
| 513 |
$_ldapauth_ldap->setOption('user_attr', $servers[$sid]->user_attr);
|
| 514 |
$_ldapauth_ldap->setOption('mail_attr', $servers[$sid]->mail_attr);
|
| 515 |
$_ldapauth_ldap->setOption('binddn', $servers[$sid]->binddn);
|
| 516 |
$_ldapauth_ldap->setOption('bindpw', $servers[$sid]->bindpw);
|
| 517 |
return $_ldapauth_ldap;
|
| 518 |
}
|
| 519 |
return FALSE;
|
| 520 |
}
|
| 521 |
|
| 522 |
/**
|
| 523 |
* Retrieve the saved ldapgroups saved setting.
|
| 524 |
*
|
| 525 |
* @param $sid
|
| 526 |
* A server ID or user object.
|
| 527 |
* @param $req
|
| 528 |
* An attribute name.
|
| 529 |
*
|
| 530 |
* @return
|
| 531 |
* The attribute value.
|
| 532 |
*/
|
| 533 |
function _ldapauth_ldap_info($sid, $req) {
|
| 534 |
if (!($sid = is_object($sid) ? (isset($sid->ldap_config) ? $sid->ldap_config : NULL) : $sid))
|
| 535 |
return;
|
| 536 |
|
| 537 |
static $servers = array();
|
| 538 |
if (!isset($servers[$sid]))
|
| 539 |
$servers[$sid] = db_fetch_object(db_query("SELECT * FROM {ldapauth} WHERE sid = %d", $sid));
|
| 540 |
|
| 541 |
switch ($req) {
|
| 542 |
case 'login_php':
|
| 543 |
return $servers[$sid]->login_php;
|
| 544 |
case 'filter_php':
|
| 545 |
return $servers[$sid]->filter_php;
|
| 546 |
}
|
| 547 |
}
|
| 548 |
|
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