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