functions_openid_connect.php

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<?php
/* Copyright (C) 2022   Jeritiana Ravelojaona <jeritiana.rav@smartone.ai>
 * Copyright (C) 2023-2024  Solution Libre SAS    <contact@solution-libre.fr>
 * Copyright (C) 2024   MDW           <mdeweerd@users.noreply.github.com>
 *
 * 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/>.
 */
 
include_once DOL_DOCUMENT_ROOT.'/core/lib/geturl.lib.php';
 
function check_user_password_openid_connect($usertotest, $passwordtotest, $entitytotest)
{
  global $db, $conf, $langs;
 
  // Force master entity in transversal mode
  $entity = $entitytotest;
  if (isModEnabled('multicompany') && getDolGlobalString('MULTICOMPANY_TRANSVERSE_MODE')) {
    $entity = 1;
  }
 
  $login = '';
 
  dol_syslog("functions_openid_connect::check_user_password_openid_connect usertotest=".$usertotest." passwordtotest=".preg_replace('/./', '*', $passwordtotest)." entitytotest=".$entitytotest);
 
  // Step 1 is done by user: request an authorization code
 
  if (GETPOSTISSET('username')) {
    // OIDC does not require credentials here: pass on to next auth handler
    $_SESSION["dol_loginmesg"] = "Not an OpenID Connect flow";
    dol_syslog("functions_openid_connect::check_user_password_openid_connect not an OIDC flow");
  } elseif (!GETPOSTISSET('state')) {
    // No state received
    $_SESSION["dol_loginmesg"] = "Error in OAuth 2.0 flow (no state received)";
  } elseif (GETPOSTISSET('code')) {
    $auth_code = GETPOST('code', 'aZ09');
    $state = GETPOST('state', 'aZ09');
    dol_syslog('functions_openid_connect::check_user_password_openid_connect code='.$auth_code.' state='.$state);
 
    if ($state === hash('sha256', session_id())) {
      // Step 2: turn the authorization code into an access token, using client_secret
      $auth_param = [
        'grant_type'    => 'authorization_code',
        'client_id'     => getDolGlobalString('MAIN_AUTHENTICATION_OIDC_CLIENT_ID'),
        'client_secret' => getDolGlobalString('MAIN_AUTHENTICATION_OIDC_CLIENT_SECRET'),
        'code'          => $auth_code,
        'redirect_uri'  => getDolGlobalString('MAIN_AUTHENTICATION_OIDC_REDIRECT_URL')
      ];
 
      $token_response = getURLContent($conf->global->MAIN_AUTHENTICATION_OIDC_TOKEN_URL, 'POST', http_build_query($auth_param));
      $token_content = json_decode($token_response['content']);
      dol_syslog("functions_openid_connect::check_user_password_openid_connect /token=".print_r($token_response, true), LOG_DEBUG);
 
      if (property_exists($token_content, 'access_token')) {
        // Step 3: retrieve user info using token
        $userinfo_headers = array('Authorization: Bearer '.$token_content->access_token);
        $userinfo_response = getURLContent($conf->global->MAIN_AUTHENTICATION_OIDC_USERINFO_URL, 'GET', '', 1, $userinfo_headers);
        $userinfo_content = json_decode($userinfo_response['content']);
 
        dol_syslog("functions_openid_connect::check_user_password_openid_connect /userinfo=".print_r($userinfo_response, true), LOG_DEBUG);
 
        // Get the user attribute (claim) matching the Dolibarr login
        $login_claim = 'email'; // default
        if (getDolGlobalString('MAIN_AUTHENTICATION_OIDC_LOGIN_CLAIM')) {
          $login_claim = getDolGlobalString('MAIN_AUTHENTICATION_OIDC_LOGIN_CLAIM');
        }
 
        if (property_exists($userinfo_content, $login_claim)) {
          // Success: retrieve claim to return to Dolibarr as login
          $sql = 'SELECT login, entity, datestartvalidity, dateendvalidity';
          $sql .= ' FROM '.MAIN_DB_PREFIX.'user';
          $sql .= " WHERE login = '".$db->escape($userinfo_content->$login_claim)."'";
          $sql .= ' AND entity IN (0,'.(array_key_exists('dol_entity', $_SESSION) ? ((int) $_SESSION["dol_entity"]) : 1).')';
 
          dol_syslog("functions_openid::check_user_password_openid", LOG_DEBUG);
 
          $resql = $db->query($sql);
          if ($resql) {
            $obj = $db->fetch_object($resql);
            if ($obj) {
              // Note: Test on date validity is done later natively with isNotIntoValidityDateRange() by core after calling checkLoginPassEntity() that call this method
              $login = $obj->login;
            }
          }
        } elseif ($userinfo_content->error) {
          // Got user info response but content is an error
          $_SESSION["dol_loginmesg"] = "Error in OAuth 2.0 flow (".$userinfo_content->error_description.")";
        } elseif ($userinfo_response['http_code'] == 200) {
          // Claim does not exist
          $_SESSION["dol_loginmesg"] = "OpenID Connect claim not found: ".$login_claim;
        } elseif ($userinfo_response['curl_error_no']) {
          // User info request error
          $_SESSION["dol_loginmesg"] = "Network error: ".$userinfo_response['curl_error_msg']." (".$userinfo_response['curl_error_no'].")";
        } else {
          // Other user info request error
          $_SESSION["dol_loginmesg"] = "Userinfo request error (".$userinfo_response['http_code'].")";
        }
      } elseif ($token_content->error) {
        // Got token response but content is an error
        $_SESSION["dol_loginmesg"] = "Error in OAuth 2.0 flow (".$token_content->error_description.")";
      } elseif ($token_response['curl_error_no']) {
        // Token request error
        $_SESSION["dol_loginmesg"] = "Network error: ".$token_response['curl_error_msg']." (".$token_response['curl_error_no'].")";
      } else {
        // Other token request error
        $_SESSION["dol_loginmesg"] = "Token request error (".$token_response['http_code'].")";
      }
    } else {
      // No code received
      $_SESSION["dol_loginmesg"] = "Error in OAuth 2.0 flow (state does not match)";
    }
  } else {
    // No code received
    $_SESSION["dol_loginmesg"] = "Error in OAuth 2.0 flow (no code received)";
  }
 
  dol_syslog("functions_openid_connect::check_user_password_openid_connect END");
 
  return !empty($login) ? $login : false;
}