Understanding Policy-based authorization in ASP.NET Core

Understanding Policy-based authorization in ASP.NET Core

Understanding Policy-based authorization in ASP.NET Core. Learn how to strengthen your application's security by understanding policy-based authorization in ASP.NET Core complete with examples.

Application security is a vital piece of our overall success as developers. Many of us have learned and applied role-based or claim-based authorization. Overall, this has been “good enough”. Unfortunately, there are still many use-cases it can’t handle gracefully. We call one approach that solves these use-cases policy-based authorization.

Today we’re applying policy-based authorization in ASP.NET Core and understanding what exactly that means. You can find the code for today’s post on Github.

Before we get started…

Before we start diving into the meat of this post, I feel it is important to make sure we clear up some terminology and concepts. First of all, there is a difference between authentication and authorization. We define Authentication as “we know you are who you say you are.” On the other hand, we define Authorization as “we know what you’re allowed to do”.

I imagine you’re familiar with role-based authorization. Role-based authorization simply states that we allow access based on the authenticated user’s roles. Users with a matching role have access. Those without, don’t.

You might also be familiar with claim-based authorization. A role is a type of claim, but it isn’t the only claim type. We could look for a claim based on their country, language, or really, anything.

Now that we have a basic understanding of some types of authorization usually in place. We also understand the difference between authentication and authorization. So, let us proceed.

programming authorization aspdotnet aspdotnet core dotnet core

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