Identity Authorize Attribute Roles with Web API - asp.net

Question

I have a small Web API application that uses Identity to manage users using Owin Bearer Tokens. The basics of this implementation work fine: I can register a user, login a user and access Web API end points that are marked with [Authorize].
My next step is to limit Web API endpoints using roles. For example, a controller that only users in the Admin role can access. I've created the Admin user as below and I add them to the Admin role. However when I update my existing controllers from [Authorize] to [Authorize(Roles = "Admin")] and try to access it using the Adim account, I get a 401 Unauthorized.
//Seed on Startup
public static void Seed()
{
var user = await userManager.FindAsync("Admin", "123456");
if (user == null)
{
IdentityUser user = new IdentityUser { UserName = "Admin" };
var createResult = await userManager.CreateAsync(user, "123456");
if (!roleManager.RoleExists("Admin"))
var createRoleResult = roleManager.Create(new IdentityRole("Admin"));
user = await userManager.FindAsync("Admin", "123456");
var addRoleResult = await userManager.AddToRoleAsync(user.Id, "Admin");
}
}
//Works
[Authorize]
public class TestController : ApiController
{
// GET api/<controller>
public bool Get()
{
return true;
}
}
//Doesn't work
[Authorize(Roles = "Admin")]
public class TestController : ApiController
{
// GET api/<controller>
public bool Get()
{
return true;
}
}
Q: What is the correct way to set up and use roles?

Answer 1

How do you set the claims for the users when they login I believe you are missing this line of code in method GrantResourceOwnerCredentials
var identity = new ClaimsIdentity(context.Options.AuthenticationType);
identity.AddClaim(new Claim(ClaimTypes.Name, context.UserName));
identity.AddClaim(new Claim(ClaimTypes.Role, "Admin"));
identity.AddClaim(new Claim(ClaimTypes.Role, "Supervisor"));
And if you want to create the identity from DB use the below:
public async Task<ClaimsIdentity> GenerateUserIdentityAsync(UserManager<ApplicationUser> manager, string authenticationType)
{
// Note the authenticationType must match the one defined in CookieAuthenticationOptions.AuthenticationType
var userIdentity = await manager.CreateIdentityAsync(this, authenticationType);
// Add custom user claims here
return userIdentity;
}
Then in GrantResourceOwnerCredentials do the below:
ClaimsIdentity oAuthIdentity = await user.GenerateUserIdentityAsync(userManager, OAuthDefaults.AuthenticationType);