functions_ldap.php

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<?php
/* Copyright (C) 2007-2011 Laurent Destailleur  <eldy@users.sourceforge.net>
 * Copyright (C) 2008-2021 Regis Houssin        <regis.houssin@inodbox.com>
 * Copyright (C) 2024      MDW                  <mdeweerd@users.noreply.github.com>
 * Copyright (C) 2024      William Mead         <william.mead@manchenumerique.fr>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <https://www.gnu.org/licenses/>.
 *
 */
 
function check_user_password_ldap($usertotest, $passwordtotest, $entitytotest)
{
  global $db, $conf, $langs;
  global $dolibarr_main_auth_ldap_host, $dolibarr_main_auth_ldap_port;
  global $dolibarr_main_auth_ldap_version, $dolibarr_main_auth_ldap_servertype;
  global $dolibarr_main_auth_ldap_login_attribute, $dolibarr_main_auth_ldap_dn;
  global $dolibarr_main_auth_ldap_admin_login, $dolibarr_main_auth_ldap_admin_pass;
  global $dolibarr_main_auth_ldap_filter;
  global $dolibarr_main_auth_ldap_debug;
 
  // Force master entity in transversal mode
  $entity = $entitytotest;
  if (isModEnabled('multicompany') && getDolGlobalString('MULTICOMPANY_TRANSVERSE_MODE')) {
    $entity = 1;
  }
 
  $login = '';
  $resultFetchUser = '';
 
  if (!function_exists("ldap_connect")) {
    dol_syslog("functions_ldap::check_user_password_ldap Authentication KO failed to connect to LDAP. LDAP functions are disabled on this PHP", LOG_ERR);
    sleep(1);
 
    // Load translation files required by the page
    $langs->loadLangs(array('main', 'other'));
 
    $_SESSION["dol_loginmesg"] = $langs->transnoentitiesnoconv("ErrorLDAPFunctionsAreDisabledOnThisPHP").' '.$langs->transnoentitiesnoconv("TryAnotherConnectionMode");
    return '';
  }
 
  if ($usertotest) {
    dol_syslog("functions_ldap::check_user_password_ldap usertotest=".$usertotest." passwordtotest=".preg_replace('/./', '*', $passwordtotest)." entitytotest=".$entitytotest);
 
    // If test username/password asked, we define $test=false and $login var if ok, set $_SESSION["dol_loginmesg"] if ko
    $ldaphost = $dolibarr_main_auth_ldap_host;
    $ldapport = $dolibarr_main_auth_ldap_port;
    $ldapversion = $dolibarr_main_auth_ldap_version;
    $ldapservertype = (empty($dolibarr_main_auth_ldap_servertype) ? 'openldap' : $dolibarr_main_auth_ldap_servertype);
 
    $ldapuserattr = $dolibarr_main_auth_ldap_login_attribute;
    $ldapdn = $dolibarr_main_auth_ldap_dn;
    $ldapadminlogin = $dolibarr_main_auth_ldap_admin_login;
    $ldapadminpass = $dolibarr_main_auth_ldap_admin_pass;
    $ldapdebug = ((empty($dolibarr_main_auth_ldap_debug) || $dolibarr_main_auth_ldap_debug == "false") ? false : true);
 
    if ($ldapdebug) {
      print "DEBUG: Logging LDAP steps<br>\n";
    }
 
    require_once DOL_DOCUMENT_ROOT.'/core/class/ldap.class.php';
    $ldap = new Ldap();
    $ldap->server = explode(',', $ldaphost);
    $ldap->serverPort = $ldapport;
    $ldap->ldapProtocolVersion = $ldapversion;
    $ldap->serverType = $ldapservertype;
    $ldap->searchUser = $ldapadminlogin;
    $ldap->searchPassword = $ldapadminpass;
 
    if ($ldapdebug) {
      dol_syslog("functions_ldap::check_user_password_ldap Server:".implode(',', $ldap->server).", Port:".$ldap->serverPort.", Protocol:".$ldap->ldapProtocolVersion.", Type:".$ldap->serverType);
      dol_syslog("functions_ldap::check_user_password_ldap uid/samaccountname=".$ldapuserattr.", dn=".$ldapdn.", Admin:".$ldap->searchUser.", Pass:".dol_trunc($ldap->searchPassword, 3));
      print "DEBUG: Server:".implode(',', $ldap->server).", Port:".$ldap->serverPort.", Protocol:".$ldap->ldapProtocolVersion.", Type:".$ldap->serverType."<br>\n";
      print "DEBUG: uid/samaccountname=".$ldapuserattr.", dn=".$ldapdn.", Admin:".$ldap->searchUser.", Pass:".dol_trunc($ldap->searchPassword, 3)."<br>\n";
    }
 
    $resultFetchLdapUser = 0;
 
    // Define $userSearchFilter
    $userSearchFilter = "";
    if (empty($dolibarr_main_auth_ldap_filter)) {
      $userSearchFilter = "(".$ldapuserattr."=".$usertotest.")";
    } else {
      // @phan-suppress-next-line PhanPluginSuspiciousParamOrderInternal
      $userSearchFilter = str_replace('%1%', $usertotest, $dolibarr_main_auth_ldap_filter);
    }
 
    // If admin login or ldap auth filter provided
    // Code to get user in LDAP from an admin connection (may differ from user connection, done later)
    if ($ldapadminlogin || $dolibarr_main_auth_ldap_filter) {
      $result = $ldap->connectBind();
      if ($result > 0) {
        $resultFetchLdapUser = $ldap->fetch($usertotest, $userSearchFilter);
        //dol_syslog('functions_ldap::check_user_password_ldap resultFetchLdapUser='.$resultFetchLdapUser);
        if ($resultFetchLdapUser > 0 && $ldap->pwdlastset == 0) { // If ok but password need to be reset
          dol_syslog('functions_ldap::check_user_password_ldap '.$usertotest.' must change password next logon');
          if ($ldapdebug) {
            print "DEBUG: User ".$usertotest." must change password<br>\n";
          }
          $ldap->unbind();
          sleep(1); // Anti brut force protection. Must be same delay when user and password are not valid.
          $langs->load('ldap');
          $_SESSION["dol_loginmesg"] = $langs->transnoentitiesnoconv("YouMustChangePassNextLogon", $usertotest, $ldap->domainFQDN);
          return '';
        }
      } else {
        if ($ldapdebug) {
          print "DEBUG: ".$ldap->error."<br>\n";
        }
      }
      $ldap->unbind();
    }
 
    // Forge LDAP user and password to test with them
    // If LDAP need a dn with login like "uid=jbloggs,ou=People,dc=foo,dc=com", default dn may work even if previous code with
    // admin login no executed.
    $ldap->searchUser = $ldapuserattr."=".$usertotest.",".$ldapdn; // Default dn (will work if LDAP accept a dn with login value inside)
    // But if LDAP need a dn with name like "cn=Jhon Bloggs,ou=People,dc=foo,dc=com", previous part must have been executed to have
    // dn detected into ldapUserDN.
    if ($resultFetchLdapUser && !empty($ldap->ldapUserDN)) {
      $ldap->searchUser = $ldap->ldapUserDN;
    }
    $ldap->searchPassword = $passwordtotest;
 
    // Test with this->seachUser and this->searchPassword
    //print $resultFetchLdapUser."-".$ldap->ldapUserDN."-".$ldap->searchUser.'-'.$ldap->searchPassword;exit;
    $result = $ldap->connectBind();
    if ($result > 0) {
      if ($result == 2) { // Connection is ok for user/pass into LDAP
        $login = $usertotest;
        dol_syslog("functions_ldap::check_user_password_ldap $login authentication ok");
        // For the case, we search the user id using a search key without the login (but using other fields like id),
        // we need to get the real login to use in the ldap answer.
        if (getDolGlobalString('LDAP_FIELD_LOGIN') && !empty($ldap->login)) {
          $login = $ldap->login;
          dol_syslog("functions_ldap::check_user_password_ldap login is now $login (LDAP_FIELD_LOGIN=".getDolGlobalString('LDAP_FIELD_LOGIN').")");
        }
 
        require_once DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php';
 
        // Note: Test on date validity is done later natively with isNotIntoValidityDateRange() by core after calling checkLoginPassEntity() that call this method
 
        // ldap2dolibarr synchronisation
        if ($login && !empty($conf->ldap->enabled) && getDolGlobalInt('LDAP_SYNCHRO_ACTIVE') == Ldap::SYNCHRO_LDAP_TO_DOLIBARR) { // ldap2dolibarr synchronization
          dol_syslog("functions_ldap::check_user_password_ldap Sync ldap2dolibarr");
 
          // On charge les attributes du user ldap
          if ($ldapdebug) {
            print "DEBUG: login ldap = ".$login."<br>\n";
          }
          $resultFetchLdapUser = $ldap->fetch($login, $userSearchFilter);
 
          if ($ldapdebug) {
            print "DEBUG: UACF = ".implode(',', $ldap->uacf)."<br>\n";
          }
          if ($ldapdebug) {
            print "DEBUG: pwdLastSet = ".dol_print_date($ldap->pwdlastset, 'day')."<br>\n";
          }
          if ($ldapdebug) {
            print "DEBUG: badPasswordTime = ".dol_print_date($ldap->badpwdtime, 'day')."<br>\n";
          }
 
          // On recherche le user dolibarr en fonction de son SID ldap (only for Active Directory)
          $sid = null;
          if (getDolGlobalString('LDAP_SERVER_TYPE') == "activedirectory") {
            $sid = $ldap->getObjectSid($login);
            if ($ldapdebug) {
              print "DEBUG: sid = ".$sid."<br>\n";
            }
          }
 
          $usertmp = new User($db);
          $resultFetchUser = $usertmp->fetch('', $login, $sid, 1, ($entitytotest > 0 ? $entitytotest : -1));
          if ($resultFetchUser > 0) {
            dol_syslog("functions_ldap::check_user_password_ldap Sync user found user id=".$usertmp->id);
            // Verify if the login changed and update the Dolibarr attributes
 
            if ($usertmp->login != $ldap->login && $ldap->login) {
              $usertmp->login = $ldap->login;
              $usertmp->update($usertmp);
              // TODO What to do if the update fails because the login already exists for another account.
            }
 
            //$resultUpdate = $usertmp->update_ldap2dolibarr($ldap);
          }
 
          unset($usertmp);
        }
 
        if (isModEnabled('multicompany')) { // We must check entity (even if sync is not active)
          global $mc;
 
          $usertmp = new User($db);
          $usertmp->fetch('', $login);
          if (is_object($mc)) {
            $ret = $mc->checkRight($usertmp->id, $entitytotest);
            if ($ret < 0) {
              dol_syslog("functions_ldap::check_user_password_ldap Authentication KO entity '".$entitytotest."' not allowed for user id '".$usertmp->id."'", LOG_NOTICE);
              $login = ''; // force authentication failure
            }
            unset($usertmp);
          }
        }
      }
      if ($result == 1) {
        dol_syslog("functions_ldap::check_user_password_ldap Authentication KO bad user/password for '".$usertotest."'", LOG_NOTICE);
        sleep(1); // Anti brut force protection. Must be same delay when user and password are not valid.
 
        // Load translation files required by the page
        $langs->loadLangs(array('main', 'other'));
 
        $_SESSION["dol_loginmesg"] = $langs->transnoentitiesnoconv("ErrorBadLoginPassword");
      }
    } else {
      /* Login failed. Return false, together with the error code and text from
       ** the LDAP server. The common error codes and reasons are listed below :
       ** (for iPlanet, other servers may differ)
       ** 19 - Account locked out (too many invalid login attempts)
       ** 32 - User does not exist
       ** 49 - Wrong password
       ** 53 - Account inactive (manually locked out by administrator)
       */
      dol_syslog("functions_ldap::check_user_password_ldap Authentication KO failed to connect to LDAP for '".$usertotest."'", LOG_NOTICE);
      if (is_resource($ldap->connection) || is_object($ldap->connection)) {    // If connection ok but bind ko
        try {
          // @phan-suppress-next-line PhanTypeMismatchArgumentInternal  Expects LDAP\Connection, not 'resource'
          $ldap->ldapErrorCode = ldap_errno($ldap->connection);
          // @phan-suppress-next-line PhanTypeMismatchArgumentInternal  Expects LDAP\Connection, not 'resource'
          $ldap->ldapErrorText = ldap_error($ldap->connection);
          dol_syslog("functions_ldap::check_user_password_ldap ".$ldap->ldapErrorCode." ".$ldap->ldapErrorText);
        } catch (Throwable $exception) {
          $ldap->ldapErrorCode = 0;
          $ldap->ldapErrorText = '';
          dol_syslog('functions_ldap::check_user_password_ldap '.$exception, LOG_WARNING);
        }
      }
      sleep(1); // Anti brut force protection. Must be same delay when user and password are not valid.
      // Load translation files required by the page
      $langs->loadLangs(array('main', 'other', 'errors'));
      $_SESSION["dol_loginmesg"] = ($ldap->error ? $ldap->error : $langs->transnoentitiesnoconv("ErrorBadLoginPassword"));
    }
    $ldap->unbind();
  }
 
  return $login;
}