src/Core/Authentication.php

   1 <?php
   2 /**
   3  * @file /src/Core/Authentication.php
   4  */
   5
   6 namespace Friendica\Core;
   7
   8 use Friendica\App;
   9 use Friendica\BaseObject;
  10 use Friendica\Network\HTTPException\ForbiddenException;
  11 use Friendica\Util\BaseURL;
  12
  13 /**
  14 * Handle Authentification, Session and Cookies
  15 */
  16 class Authentication extends BaseObject
  17 {
  18         /**
  19          * @brief Calculate the hash that is needed for the "Friendica" cookie
  20          *
  21          * @param array $user Record from "user" table
  22          *
  23          * @return string Hashed data
  24          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  25          */
  26         public static function getCookieHashForUser($user)
  27         {
  28                 return(hash("sha256", Config::get("system", "site_prvkey") .
  29                                 $user["prvkey"] .
  30                                 $user["password"]));
  31         }
  32
  33         /**
  34          * @brief Set the "Friendica" cookie
  35          *
  36          * @param int   $time
  37          * @param array $user Record from "user" table
  38          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  39          */
  40         public static  function setCookie($time, $user = [])
  41         {
  42                 if ($time != 0) {
  43                         $time = $time + time();
  44                 }
  45
  46                 if ($user) {
  47                         $value = json_encode(["uid" => $user["uid"],
  48                                 "hash" => self::getCookieHashForUser($user),
  49                                 "ip" => defaults($_SERVER, 'REMOTE_ADDR', '0.0.0.0')]);
  50                 } else {
  51                         $value = "";
  52                 }
  53
  54                 setcookie("Friendica", $value, $time, "/", "", (Config::get('system', 'ssl_policy') == BaseUrl::SSL_POLICY_FULL), true);
  55         }
  56
  57         /**
  58          * @brief Kills the "Friendica" cookie and all session data
  59          */
  60         public static function deleteSession()
  61         {
  62                 self::setCookie(-3600); // make sure cookie is deleted on browser close, as a security measure
  63                 session_unset();
  64                 session_destroy();
  65         }
  66
  67         public static function twoFactorCheck($uid, App $a)
  68         {
  69                 // Check user setting, if 2FA disabled return
  70                 if (!PConfig::get($uid, '2fa', 'verified')) {
  71                         return;
  72                 }
  73
  74                 // Check current path, if 2fa authentication module return
  75                 if ($a->argc > 0 && in_array($a->argv[0], ['2fa', 'view', 'help', 'api', 'proxy', 'logout'])) {
  76                         return;
  77                 }
  78
  79                 // Case 1: 2FA session present and valid: return
  80                 if (Session::get('2fa')) {
  81                         return;
  82                 }
  83
  84                 // Case 2: No valid 2FA session: redirect to code verification page
  85                 if ($a->isAjax()) {
  86                         throw new ForbiddenException();
  87                 } else {
  88                         $a->internalRedirect('2fa');
  89                 }
  90         }
  91 }
  92