57 lines
2.7 KiB
C#
57 lines
2.7 KiB
C#
// Copyright (c) Brock Allen & Dominick Baier. All rights reserved.
|
|
// Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information.
|
|
|
|
|
|
using Microsoft.AspNetCore.Mvc;
|
|
using Microsoft.AspNetCore.Mvc.Filters;
|
|
|
|
namespace IdentityServerHost.Quickstart.UI
|
|
{
|
|
public class SecurityHeadersAttribute : ActionFilterAttribute
|
|
{
|
|
public override void OnResultExecuting(ResultExecutingContext context)
|
|
{
|
|
var result = context.Result;
|
|
if (result is ViewResult)
|
|
{
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options
|
|
if (!context.HttpContext.Response.Headers.ContainsKey("X-Content-Type-Options"))
|
|
{
|
|
context.HttpContext.Response.Headers.Add("X-Content-Type-Options", "nosniff");
|
|
}
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
|
|
if (!context.HttpContext.Response.Headers.ContainsKey("X-Frame-Options"))
|
|
{
|
|
context.HttpContext.Response.Headers.Add("X-Frame-Options", "SAMEORIGIN");
|
|
}
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Security-Policy
|
|
var csp = "default-src 'self'; object-src 'none'; frame-ancestors 'none'; sandbox allow-forms allow-same-origin allow-scripts; base-uri 'self';";
|
|
// also consider adding upgrade-insecure-requests once you have HTTPS in place for production
|
|
//csp += "upgrade-insecure-requests;";
|
|
// also an example if you need client images to be displayed from twitter
|
|
// csp += "img-src 'self' https://pbs.twimg.com;";
|
|
|
|
// once for standards compliant browsers
|
|
if (!context.HttpContext.Response.Headers.ContainsKey("Content-Security-Policy"))
|
|
{
|
|
context.HttpContext.Response.Headers.Add("Content-Security-Policy", csp);
|
|
}
|
|
// and once again for IE
|
|
if (!context.HttpContext.Response.Headers.ContainsKey("X-Content-Security-Policy"))
|
|
{
|
|
context.HttpContext.Response.Headers.Add("X-Content-Security-Policy", csp);
|
|
}
|
|
|
|
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
|
|
var referrer_policy = "no-referrer";
|
|
if (!context.HttpContext.Response.Headers.ContainsKey("Referrer-Policy"))
|
|
{
|
|
context.HttpContext.Response.Headers.Add("Referrer-Policy", referrer_policy);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|