Can't access stored ClaimsPrincipal in ASP.NET Core-CodePudding

I've implemented a claim-based authorization on ASP.NET Core 3.1, where I've stored authentication info through claims and I need to retrieve it after signing in.

I found a post on StackOverFlow and did what it said exactly; Now, I've faced another problem.

Problem

I try to get the ClaimsPrincipal which I stored it while signing in. but once I try to retrieve it, it returns null; I read somewhere the ClaimsPrincipal was not stored on the same thread. Then, how do I fix it?

Configuring the authentication and authorization in Startup.cs like this:

services.AddAuthentication("Authn").AddCookie("Authn", options => {
                options.Cookie.Name = "Authn";
                options.LoginPath = "/Views/Account/SignIn";
            });
services.AddAuthorization(options => {
                options.AddPolicy("userSignInPolicy", p => p.RequireClaim("Role", "User"));
            });

This is where authentication is done and ClaimsPrincipal gets stored:

List<Claim> uclaims = new List<Claim>() {
                        new Claim("Role","User"),
                        new Claim("ID",p.User_id.ToString())
                        };

ClaimsIdentity userid = new ClaimsIdentity(uclaims, "Authn");
ClaimsPrincipal usercp = new ClaimsPrincipal(userid);

await HttpContext.SignInAsync("Authn", usercp);

Thread.CurrentPrincipal = usercp; //This is where ClaimsPrincipal is stored
return RedirectToAction("userDashboard");

And this is when I try to retrieve it:

public IActionResult userDashboard()
{
    var id = (ClaimsIdentity)Thread.CurrentPrincipal; //id is returned null here :(
    //rest of the action
}

Didn't find any similar issue on StackOverflow. Any help is appreciated.

CodePudding user response：

You don't have to store ClaimsPrincipal in Thread.CurrentPrincipal.

Inside your Controllers simply use this.User to access the ClaimsPrincipal.