How to authorize access to static files based on claims

Question

Static files can require the user to be authenticated as per documentation

I have not been able to find any info on restricting authorized access to static files, according to specific claims.

E.g. users with claims "A" and "B" have access to folder A and B, where as users with only claim "B" only have access to folder B

How would I accomplish this "as easy as possible" with .NET 6.0 / webAPI / static files?

Answer 1

Currently there is no built-in way to secure wwwroot directories, I think you can expose an endpoint, and then make judgments in the endpoint, This is a very simple method as you expected, in your question, you want to access static file A only user with claims A,I write a similar demo here, hope it can help you to solve your problem.

First I have a static file named "AAA" in wwwroot.

I use Asp.Net Core Identity here, Now I am logged in as a user, Then I add claim to this user.

//the claim's type and value is the same with static file name
Claim claim = new Claim("AAA", "AAA");

await _userManager.AddClaimAsync(user,claim);

Then I expose an endpoint to get the static path then do judgments :

//Add [Authorize] attribute, the controller can only be accessed when the user is logged in 

[Authorize]
public class TestController : Controller
{
//Pass in the name of the static file that needs to be accessed, and then use claim to authorize
    public IActionResult Find(string path)
    {
        var value = IHttpContextAccessor.HttpContext.User.Claims.Where(e => e.Type == path ).Select(e => e.Value).FirstOrDefault();
        if(value !=null && value == path) {

             //authorize success
            //read the static file and do what you want
            
        }else{
            //authorize fail
        }
    }
}

View

//use asp-route-path="AAA" to pass the value of path
<a asp-controller="Test" asp-action="Find" asp-route-path="AAA">AAA</a>

<a asp-controller="Test" asp-action="Find" asp-route-path="BBB">BBB</a>

//.......