X-Git-Url: https://git-public.kairo.at/?p=authserver.git;a=blobdiff_plain;f=authutils.php-class;h=e72768a2bd35c883384d47fec68ff7375a8f5544;hp=4d5680a5264b4402bd80ffce5e9bcd37aa6b352a;hb=b217e836543c89d872c8f692e2557c8c43da468f;hpb=409b55f4dbb4267e83e8ae2fda56f243ab8be250

diff --git a/authutils.php-class b/authutils.php-class
index 4d5680a..e72768a 100755
--- a/authutils.php-class
+++ b/authutils.php-class
@@ -18,6 +18,9 @@ class AuthUtils {
   // public $running_on_localhost
   //   A boolean telling if the system is running on localhost (where https is not required).
   //
+  // public $client_reg_email_whitelist
+  //   An array of emails that are whitelisted for registering clients.
+  //
   // private $pwd_cost
   //   The cost parameter for use with PHP password_hash function.
   //
@@ -46,6 +49,9 @@ class AuthUtils {
   // function createVerificationCode()
   //   Return a random acount/email verification code.
   //
+  // function createClientSecret()
+  //   Return a random client secret.
+  //
   // function createTimeCode($session, [$offset], [$validity_minutes])
   //   Return a time-based code based on the key and ID of the given session.
   //     An offset can be given to create a specific code for verification, otherwise and offset will be generated.
@@ -71,6 +77,7 @@ class AuthUtils {
     // *** constructor ***
     $this->db = $db;
     $this->db->exec("SET time_zone='+00:00';"); // Execute directly on PDO object, set session to UTC to make our gmdate() values match correctly.
+    // For debugging, potentially add |robert\.box\.kairo\.at to that regex temporarily.
     $this->running_on_localhost = preg_match('/^((.+\.)?localhost|127\.0\.0\.\d+)$/', $_SERVER['SERVER_NAME']);
     if (array_key_exists('pwd_cost', $settings)) {
       $this->pwd_cost = $settings['pwd_cost'];
@@ -82,6 +89,7 @@ class AuthUtils {
 
   public $db = null;
   public $running_on_localhost = false;
+  public $client_reg_email_whitelist = array('kairo@kairo.at', 'com@kairo.at');
   private $pwd_cost = 10;
   private $pwd_nonces = array();
 
@@ -100,6 +108,26 @@ class AuthUtils {
     return $errors;
   }
 
+  function sendSecurityHeaders() {
+    // Send various headers that we want to have for security resons, mostly as recommended by https://observatory.mozilla.org/
+
+    // CSP - see https://wiki.mozilla.org/Security/Guidelines/Web_Security#Content_Security_Policy
+    // Disable unsafe inline/eval, only allow loading of resources (images, fonts, scripts, etc.) from ourselves; also disable framing.
+    header('Content-Security-Policy: default-src \'none\';img-src \'self\'; script-src \'self\'; style-src \'self\'; frame-ancestors \'none\'');
+
+    // X-Content-Type-Options - see https://wiki.mozilla.org/Security/Guidelines/Web_Security#X-Content-Type-Options
+    // Prevent browsers from incorrectly detecting non-scripts as scripts
+    header('X-Content-Type-Options: nosniff');
+
+    // X-Frame-Options (for older browsers) - see https://wiki.mozilla.org/Security/Guidelines/Web_Security#X-Frame-Options
+    // Block site from being framed
+    header('X-Frame-Options: DENY');
+
+    // X-XSS-Protection (for older browsers) - see https://wiki.mozilla.org/Security/Guidelines/Web_Security#X-XSS-Protection
+    // Block pages from loading when they detect reflected XSS attacks
+    header('X-XSS-Protection: 1; mode=block');
+  }
+
   function initSession() {
     $session = null;
     if (strlen(@$_COOKIE['sessionkey'])) {
@@ -166,6 +194,10 @@ class AuthUtils {
     return bin2hex(openssl_random_pseudo_bytes(512 / 8)); // Get 512 bits of randomness (128 byte hex string).
   }
 
+  function createClientSecret() {
+    return bin2hex(openssl_random_pseudo_bytes(160 / 8)); // Get 160 bits of randomness (40 byte hex string).
+  }
+
   function createTimeCode($session, $offset = null, $validity_minutes = 10) {
     // Matches TOTP algorithms, see https://en.wikipedia.org/wiki/Time-based_One-time_Password_Algorithm
     $valid_seconds = intval($validity_minutes) * 60;