我的问题似乎很简单,我觉得我遗漏了一些非常明显的东西;但是我无法确定为什么脚本元素上的Nonce属性没有填充,而是保留了空字符串。
我决定使用HttpContext内部的Items集合存储随机数,因为据我所知,它是每个请求的。
Startup.Configure(IApplicationBuilder应用程序,IHostingEnvironment env)
...
app.Use(async (context, next) => { //CSP
RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider();
byte[] nonceBytes = new byte[32];
rng.GetBytes(nonceBytes);
string nonce = Convert.ToBase64String(nonceBytes);
context.Items.Add("ScriptNonce", nonce);
context.Response.Headers.Add("Content-Security-Policy", string.Format(
"default-src 'none'; " +
"script-src 'self' 'unsafe-eval' 'nonce-{0}'; " +
"style-src 'self'; " +
"img-src 'self' data: https:; " +
"base-uri 'self'; " +
"upgrade-insecure-requests; " +
"object-src 'none'; ", nonce));
await next();
});
...
查看
...
@section Scripts {
<script src="~/lib/jquery-ajax-unobtrusive/jquery.unobtrusive-ajax.min.js" nonce="@Context.Items["ScriptNonce"]"></script>
<script src="~/js/Views/Admin/users_index.min.js" nonce="@Context.Items["ScriptNonce"]"></script>
}
结果:
The Nonce is generated, it exists in HttpContext.Items, does not populate.
这似乎非常简单,而且我对为什么不填充属性感到困惑。 我对Web开发有点陌生,因此,如果有什么值得推荐的地方,ASP.Net Core 2中的任何技巧将不胜感激。
答案:First Comment; The nonce was there the entire time, chrome was hiding it.