How to get claims in .Net Core 3.1 Web API Controller?

Question

I have the following configuration in my ASP.NET Core Web API:

// Adds Microsoft Identity platform (AAD v2.0) support to protect this Api
services.AddMicrosoftIdentityWebApiAuthentication(configuration);

services.AddControllers(options =>
{
    var policy = new AuthorizationPolicyBuilder()
        .RequireAuthenticatedUser()
        .RequireClaim("email")
        .Build();
    options.Filters.Add(new AuthorizeFilter(policy));
});

I have an Angular client application that sends the AuthToken with each request.

Below is my asp.net WEB API controller

[Route("[controller]")]
public class UserController : ControllerBase
{
    [HttpGet]
    public IActionResult Get()
    {
        //Get User Email ID from Claims
        //Get User details from Database
        //Return the User Details
        ...
    }
}

In the asp.net WEB API controller, I need to get the Email claim from the AuthToken.

How to get claims in .Net Core 3.1 Web API Controller ? Any best practices to be followed?

Reference: https://stackoverflow.com/questions/68817413/how-to-get-user-information-after-login-in-asp-net-core3-1#:~:text=You%20can%20create%20an%20helper%20class%20like%20this%20one%3A

Okan Karadag · Accepted Answer · 2022-07-07 13:19:56Z

3

 var identity = HttpContext.User.Identity as ClaimsIdentity;
 var email = identity?.FindFirst("email")?.Value;
 //or
 var email2 = User.Claims.FirstOrDefault(x => x.Type == "email")?.Value

answered Jul 7, 2022 at 13:19

Okan Karadag

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1 Comment

Oliver Nilsen Over a year ago

Sorry if this is a noob question but what does the "Type" represent here in an IEnumerable? I see Claims having a list of 19 objects and was not sure what Type means.

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