using aspnet identity with custom tables

Question

I am working on asp.net MVC core application. I have custom database with users and roles tables. I want to use asp.net identity with custom tables so that I don't have to use aspnetusers, aspnet roles tables. How to do it with asp.net identity and asp.net core

Answer 1

Good luck with that! :) I have just gone through that process last few days. I've got it to work but its really painful at some stages.

In short:

1. You need to create your own user model that implements IUser interface.
2. You need to create your own DAL that gets data from your custom db tables
3. You need to implement your own UserStore that implements different interfaces based on what functionality of asp.identity you want to use

This link will help you: https://www.asp.net/identity/overview/extensibility/overview-of-custom-storage-providers-for-aspnet-identity

Answer 2

You can use Cookie Middleware Authentication.

In your Startup.cs you add

app.UseCookieAuthentication(new CookieAuthenticationOptions()
   {
       AuthenticationScheme = "MyCookieMiddlewareInstance",
       LoginPath = new PathString("/Account/Unauthorized/"),
       AccessDeniedPath = new PathString("/Account/Forbidden/"),
       AutomaticAuthenticate = true,
       AutomaticChallenge = true
   });

In your code, after you validate username and password, to login you call

await HttpContext.Authentication.SignInAsync("MyCookieMiddlewareInstance", principal);

and to signoff

await HttpContext.Authentication.SignOutAsync("MyCookieMiddlewareInstance");

Please see article at Microsoft website for more details