src/Core/Authentication.php

   1 <?php
   2
   3 /**
   4  * @file /src/Core/Authentication.php
   5  */
   6
   7 namespace Friendica\Core;
   8
   9 use Friendica\App;
  10 use Friendica\BaseObject;
  11 use Friendica\Network\HTTPException\ForbiddenException;
  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_hmac(
  29                         "sha256",
  30                         hash_hmac("sha256", $user["password"], $user["prvkey"]),
  31                         Config::get("system", "site_prvkey")
  32                 );
  33         }
  34
  35         /**
  36          * @brief Set the "Friendica" cookie
  37          *
  38          * @param int   $time
  39          * @param array $user Record from "user" table
  40          * @throws \Friendica\Network\HTTPException\InternalServerErrorException
  41          */
  42         public static  function setCookie($time, $user = [])
  43         {
  44                 if ($time != 0) {
  45                         $time = $time + time();
  46                 }
  47
  48                 if ($user) {
  49                         $value = json_encode([
  50                                 "uid" => $user["uid"],
  51                                 "hash" => self::getCookieHashForUser($user),
  52                                 "ip" => ($_SERVER['REMOTE_ADDR'] ?? '') ?: '0.0.0.0'
  53                         ]);
  54                 } else {
  55                         $value = "";
  56                 }
  57
  58                 setcookie("Friendica", $value, $time, "/", "", (Config::get('system', 'ssl_policy') == App\BaseURL::SSL_POLICY_FULL), true);
  59         }
  60
  61         /**
  62          * @brief Kills the "Friendica" cookie and all session data
  63          */
  64         public static function deleteSession()
  65         {
  66                 self::setCookie(-3600); // make sure cookie is deleted on browser close, as a security measure
  67                 session_unset();
  68                 session_destroy();
  69         }
  70
  71         public static function twoFactorCheck($uid, App $a)
  72         {
  73                 // Check user setting, if 2FA disabled return
  74                 if (!PConfig::get($uid, '2fa', 'verified')) {
  75                         return;
  76                 }
  77
  78                 // Check current path, if 2fa authentication module return
  79                 if ($a->argc > 0 && in_array($a->argv[0], ['2fa', 'view', 'help', 'api', 'proxy', 'logout'])) {
  80                         return;
  81                 }
  82
  83                 // Case 1: 2FA session present and valid: return
  84                 if (Session::get('2fa')) {
  85                         return;
  86                 }
  87
  88                 // Case 2: No valid 2FA session: redirect to code verification page
  89                 if ($a->isAjax()) {
  90                         throw new ForbiddenException();
  91                 } else {
  92                         $a->internalRedirect('2fa');
  93                 }
  94         }
  95 }