api_login.class.php

<?php
/* Copyright (C) 2015   Jean-François Ferry     <jfefe@aternatik.fr>
 * Copyright (C) 2016 Laurent Destailleur   <eldy@users.sourceforge.net>
 *
 * 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/>.
 */
 
use Luracast\Restler\RestException;
 
require_once DOL_DOCUMENT_ROOT.'/core/lib/security.lib.php';
require_once DOL_DOCUMENT_ROOT.'/user/class/user.class.php';
 
class Login
{
  public $db;
 
  public function __construct()
  {
    global $conf, $db;
    $this->db = $db;
 
    //$conf->global->MAIN_MODULE_API_LOGIN_DISABLED = 1;
    if (getDolGlobalString('MAIN_MODULE_API_LOGIN_DISABLED')) {
      throw new RestException(403, "Error login APIs are disabled. You must get the token from backoffice to be able to use APIs");
    }
  }
 
  public function loginUnsecured($login, $password, $entity = '', $reset = 0)
  {
    return $this->index($login, $password, $entity, $reset);
  }
 
  public function index($login, $password, $entity = '', $reset = 0)
  {
    global $conf, $dolibarr_main_authentication, $dolibarr_auto_user;
 
    // Is the login API disabled ? The token must be generated from backoffice only.
    if (getDolGlobalString('API_DISABLE_LOGIN_API')) {
      dol_syslog("Warning: A try to use the login API has been done while the login API is disabled. You must generate or get the token from the backoffice.", LOG_WARNING);
      throw new RestException(403, "Error, the login API has been disabled for security purpose. You must generate or get the token from the backoffice.");
    }
 
    // Authentication mode
    if (empty($dolibarr_main_authentication)) {
      $dolibarr_main_authentication = 'dolibarr';
    }
 
    // Authentication mode: forceuser
    if ($dolibarr_main_authentication == 'forceuser') {
      if (empty($dolibarr_auto_user)) {
        $dolibarr_auto_user = 'auto';
      }
      if ($dolibarr_auto_user != $login) {
        dol_syslog("Warning: your instance is set to use the automatic forced login '".$dolibarr_auto_user."' that is not the requested login. API usage is forbidden in this mode.");
        throw new RestException(403, "Your instance is set to use the automatic login '".$dolibarr_auto_user."' that is not the requested login. API usage is forbidden in this mode.");
      }
    }
 
    // Set authmode
    $authmode = explode(',', $dolibarr_main_authentication);
 
    if ($entity != '' && !is_numeric($entity)) {
      throw new RestException(403, "Bad value for entity, must be the numeric ID of company.");
    }
    if ($entity == '') {
      $entity = 1;
    }
 
    include_once DOL_DOCUMENT_ROOT.'/core/lib/security2.lib.php';
    $login = checkLoginPassEntity($login, $password, $entity, $authmode, 'api');    // Check credentials.
    if ($login === '--bad-login-validity--') {
      $login = '';
    }
    if (empty($login)) {
      throw new RestException(403, 'Access denied');
    }
 
    $token = 'failedtogenerateorgettoken';
 
    $tmpuser = new User($this->db);
    $tmpuser->fetch(0, $login, 0, 0, $entity);
    if (empty($tmpuser->id)) {
      throw new RestException(500, 'Failed to load user');
    }
 
    // Renew the hash
    if (empty($tmpuser->api_key) || $reset) {
      $tmpuser->getrights();
      if (!$tmpuser->hasRight('user', 'self', 'creer')) {
        if (empty($tmpuser->api_key)) {
          throw new RestException(403, 'No API token set for this user and user need write permission on itself to reset its API token');
        } else {
          throw new RestException(403, 'User need write permission on itself to reset its API token');
        }
      }
 
      // Generate token for user
      $token = dol_hash($login.uniqid().(!getDolGlobalString('MAIN_API_KEY') ? '' : $conf->global->MAIN_API_KEY), 1);
 
      // We store API token into database
      $sql = "UPDATE ".MAIN_DB_PREFIX."user";
      $sql .= " SET api_key = '".$this->db->escape(dolEncrypt($token, '', '', 'dolibarr'))."'";
      $sql .= " WHERE login = '".$this->db->escape($login)."'";
 
      dol_syslog(get_class($this)."::login", LOG_DEBUG); // No log
      $result = $this->db->query($sql);
      if (!$result) {
        throw new RestException(500, 'Error when updating api_key for user :'.$this->db->lasterror());
      }
    } else {
      $token = $tmpuser->api_key;
      if (!utf8_check($token)) {
        throw new RestException(500, 'Error, the API token of this user has a non valid value. Try to update it with a valid value.');
      }
    }
 
    if (!ascii_check($token)) {
      throw new RestException(500, 'Error the token for this user has not an hexa format. Try first to reset it.');
    }
 
    //return token
    return array(
      'success' => array(
        'code' => 200,
        'token' => $token,
        'entity' => $tmpuser->entity,
        'message' => 'Welcome '.$login.($reset ? ' - Token is new' : ' - This is your token (recorded for your user). You can use it to make any REST API call, or enter it into the DOLAPIKEY field to use the Dolibarr API explorer.')
      )
    );
  }
}