Can not get claims from bearer token in MVC front end app - asp.net-web-api

Question

I am able to call the API to get the Token in my local, However how do i use this token in my ASP.NET MVC front end application and get the claims. I tried something like this (mentioned below) but some how i am not able to decrypt the token and get the claims. I made sure that Machine key’s are same.
var unencryptedToken = Startup.OAuthBearerOptions.AccessTokenFormat.Unprotect(accessToken);
//(This line is always returning the null)
var identity = unencryptedToken.Identity;
var id = new ClaimsIdentity(identity.Claims, DefaultAuthenticationTypes.ApplicationCookie);
Can you help me with this??
I have used below article to build my webapi to generate the token.
http://bitoftech.net/2014/06/01/token-based-authentication-asp-net-web-api-2-owin-asp-net-identity/
Regards,
Rupesh

Answer 1

Though old question, but I had to implement this today. You can try getting information from the RequestContext's User object like this:
var userName = idt.Claims.Where(x => x.Type == "UserName").Select(x => x.Value).First();
var roles = idt.Claims.Where(x => x.Type == "role").Select(x => x.Value).FirstOrDefault();
return new[] {$"'userNameClaim':'{userName}','rolesClaim':'{roles}'"};
I have added extension method to make it easier to return comma separated string of roles:
public static class RequestExtensions
{
public static string GetRoles(this HttpRequestContext context)
{
var idt = context.Principal.Identity as ClaimsIdentity;
if (idt == null)
return string.Empty;
var roles = idt.Claims.Where(x => x.Type == "role")
.Select(x => x.Value).FirstOrDefault();
return roles;
}
public static string GetUserName(this HttpRequestContext context)
{
var idt = context.Principal.Identity as ClaimsIdentity;
if (idt == null)
return string.Empty;
var userName = idt.Claims.Where(x => x.Type == "UserName")
.Select(x => x.Value).FirstOrDefault();
return userName;
}
}