Why do you need to access claimsprincipal object?

Why do you need to access claimsprincipal object?

However, the reason you want to get to the ClaimsPrincipal object is to access the claims that are associated with it. That’s because claims perform two functions. Primarily, of course, claims provide authorization information which is why you need them for authorization code.

When to use claimsprincipal in procedural code?

When you need to integrate authorization with procedural code, you’re going to need your application’s ClaimsPrincipal object so that you can check the user’s authorization claims. Here’s both how to get to the ClaimsPrincipal and how to extend it with custom claims.

How to add a claim to the claimsprincipal?

You can’t actually add claims directly to the ClaimsPrincipal’s Claims collection. Instead, you create a new ClaimsIdentity object, add claims to it, and then add that ClaimsIdentity object to the ClaimsPrincipal object (claims added to any ClaimsIdentity automatically appear in the ClaimsPrincipal’s Claims collection).

How to access authorization claims in ASP.NET?

Adding that interface to a class obliges you to add the TransformAsync method to your class (the TransformAsync method will automatically be called by ASP.NET after the user is authenticated and will be passed the ClaimsPrincipal object representing the current user).

How are claims used to gain access to resources?

Claims are used to gain access to resources. Access to a given protected resource is determined by comparing the claims needed to access that resource with the claims associated with the entity attempting access. A claim is the expression of a right with respect to a particular value. A right could be something like “Read”, “Write”, or “Execute.”

How does the presence of claims affect the authorization policy?

The presence or absence of claims in the system influences the behavior of an authorization policy with respect to whether it adds additional claims. For example, the authorization policy has access to a database that includes the birthdates of the various entities using the system.

Where do claims come from in the identity model?

Claims can come from a variety of sources. One common source of claims is credentials presented by a user, for example as part of a message sent to a Web service. The system validates such claims, and they become part of a set of claims associated with the user.