Asp.Net Core 6.0 Authentication, Authorization, and Role
We are going to take a look at how we integrate asp.net identity in our Asp.net Core app using StudentTeacher API Project, as well as how we implement JWTs for authentication and authorization. We have also looked at how we can implement a simple authentication mechanism using Bearer tokens with JWTs on ASP.NET Core, followed by creating custom policies to customize the authorization process. So far, we have seen why token-based authentication using JWT is a simple and elegant way of protecting API endpoints from unauthorized or unwanted access while exposed on the web, and how Authentication and Authorization are different from one another. There are many resources that covers how to create custom authentication using JWTs with Symmetric Signing, but for this article, we are going to focus on using OpenID Connect and OAuth 2 flows (using Auth0/Identity Server/OKta/...) where APIs are protected resources.
VueJS, Blazor, need to securely access web APIs in ASP.NET Core 6 using well-defined Authentication & Authorization mechanisms. We can expose specific API action methods in those policies, so when the user is authenticated, a role for the user is extracted, and then, according to the policies that are configured on the role, the user is granted access to API action methods. With the Role-based policies, we can easily provide API method access to users with specific roles. In ASP.NET Core 6, the Role-Based Authentication allows us to combine roles in a group, and we can set access policies for API methods on those groups.
We will use the AuthorizeAttribute attributes on methods that we wish to authorize access for a particular role. For instance, using the Roles attribute, we can indicate what roles are allowed to execute certain actions. We can then configure Authorization Middleware to look for Role attributes available on tokens in order to authorize access to a decorated endpoint.
Let us look at how we can authorize an API access either by the users Role defined by the system, or the users based claim on a JWT token passed inside a request. Fourth, I am going to modify the implementation of the authenticate method from the InventoryController class, so that it adds a users user role alongside an authentication token to create the identity. The sample is built upon the other tutorial that I posted recently that focused on JWT authentication in.NET 6.0, this tutorial has been extended to include permission/access controls based on roles atop the JWT authentication.
It contains classes that are responsible for implementing user-defined JWT authentication and role-based authorization on a.NET 6.0 API. Controller actions are secured using JWT using the below Custom Authorization attributes, except the Authenticate method, which allows public access, by overriding the Controllers [Authorize] attribute on the Controller.Net User Controller with the [AllowAnonymous] attribute on the Action method. Below are instructions for using Postman to authenticate Admin Test User in order to obtain a JWT token from a.NET 6.0 API, then making the authenticate request using the token in order to fetch the users list from the API.
The library implements most of the features described in the series "A Better Way to Handle Authorization," but the library will work with any authentication provider for ASP.NET Core, and it now supports JWT Tokens. To read more about using Angular Guard with Angular and JWT, and how it helps us with adding tokens to request authorization headers, you can check out Authenticating ASP.NET Core with JWT and Angular on our site. Authentication & authorization in.NET 6 with JWT and asp.net identity Implementation of the Json web token and identity user in.Net 6 for API security User authentication & authorization is a crucial part of every app.
We will be storing the users credentials in the SQL Server Database, and use the Entity Framework and the Microsoft Identity Framework for the Database operations. We will introduce role-level permissions, so only certain roles can access protected resources.
Cited Sources
- https://jasonwatmore.com/post/2022/02/18/net-6-role-based-authorization-tutorial-with-example-api 0
- https://dotnetcorecentral.com/blog/asp-net-core-authorization/ 1
- https://medium.com/@ajidejibola/authentication-and-authorization-in-net-6-with-jwt-and-asp-net-identity-2566e75851fe 2
- https://codewithmukesh.com/blog/permission-based-authorization-in-aspnet-core/ 3
- https://code-maze.com/angular-role-based-authorization-with-aspnet-identity/ 4
- https://endjin.com/blog/2022/03/adding-authentication-and-authorisation-to-aspnet-core-web-applications 5
- https://www.c-sharpcorner.com/article/jwt-authentication-and-authorization-in-net-6-0-with-identity-framework/ 6
- https://www.webnethelper.com/2022/03/aspnet-core-6-using-role-based-security.html 7
- https://sandrino.dev/blog/aspnet-core-5-jwt-authorization 8
- https://referbruv.com/blog/role-based-and-claims-based-authorization-in-aspnet-core-using-policies-hands-on/ 9
- https://www.thereformedprogrammer.net/finally-a-library-that-improves-role-authorization-in-asp-net-core/ 10