feat(core) Add security HTTP headers

issue #5842

html/index.php

@@ -24,7 +24,11 @@ require_once ("../include/php_setup.inc");
 require_once ("functions.inc");
 require_once ("variables.inc");
 require_once ("class_logging.inc");
-header("Content-type: text/html; charset=UTF-8");
+
+/* Set headers */
+header('Content-type: text/html; charset=UTF-8');
+header('X-XSS-Protection: 1; mode=block');
+header('X-Content-Type-Options: nosniff');
 
 /* Display the login page and exit() */
 function displayLogin()

html/main.php

@@ -27,8 +27,10 @@ require_once ("../include/php_setup.inc");
 require_once ("functions.inc");
 require_once ("variables.inc");
 
-/* Set header */
-header("Content-type: text/html; charset=UTF-8");
+/* Set headers */
+header('Content-type: text/html; charset=UTF-8');
+header('X-XSS-Protection: 1; mode=block');
+header('X-Content-Type-Options: nosniff');
 
 /* Set the text domain as 'fusiondirectory' */
 $domain = 'fusiondirectory';

html/setup.php

@@ -35,8 +35,10 @@ require_once("../setup/class_setupStepMigrate.inc");
 require_once("../setup/class_setupStepFinish.inc");
 
 
-/* Set header */
-header("Content-type: text/html; charset=UTF-8");
+/* Set headers */
+header('Content-type: text/html; charset=UTF-8');
+header('X-XSS-Protection: 1; mode=block');
+header('X-Content-Type-Options: nosniff');
 
 /* Set cookie lifetime to one day (The parameter is in seconds ) */
 session_set_cookie_params(24 * 60 * 60);