Configure OWIN authentication

2 min

A startup function sets up the hosting environment by registering a set of middleware with the application. For each request, the application calls each middleware component with the head pointer of a linked list to an existing set of handlers. Each middleware can add one or more handlers to the request-handling pipeline by returning a reference to the handler, who is the head of the list. Each handler is responsible for remembering and invoking the next handler in the list.

Terminology

OWIN – An abstraction between Web servers and framework components.

Middleware – A function called in the OWIN pipeline.

To configure OWIN authentication, set the authentication type in the <system.web> section of web.config.

<authentication mode="None"></authentication>

To configure OWIN authentication, create a Startup file in your project that handles the configuration of the different authentication middleware.

using System;
using Microsoft.AspNet.Identity;
using Microsoft.AspNet.Identity.Owin;
using Microsoft.Owin;
using Microsoft.Owin.Security.Cookies;
using Microsoft.Owin.Security.Google;
using Owin;
using WebApplication1.Models;

namespace WebApplication1 {
  public partial class Startup {
    // For more information on configuring authentication, please visit http://go.microsoft.com/fwlink/?LinkId=301864
    public void ConfigureAuth(IAppBuilder app) {
      // Configure the db context, user manager and signin manager to use a single instance per request
      app.CreatePerOwinContext(ApplicationDbContext.Create);
      app.CreatePerOwinContext<ApplicationUserManager>(ApplicationUserManager.Create);
      app.CreatePerOwinContext<ApplicationSignInManager>(ApplicationSignInManager.Create);

      // Enable the application to use a cookie to store information for the signed in user
      // and to use a cookie to temporarily store information about a user logging in with a third party login provider
      // Configure the sign in cookie
      app.UseCookieAuthentication(new CookieAuthenticationOptions {
        AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,
          LoginPath = new PathString("/Account/Login"),
          Provider = new CookieAuthenticationProvider {
            // Enables the application to validate the security stamp when the user logs in.
            // This is a security feature which is used when you change a password or add an external login to your account.  
            OnValidateIdentity = SecurityStampValidator.OnValidateIdentity<ApplicationUserManager<ApplicationUser>, ApplicationUser>(
              validateInterval: TimeSpan.FromMinutes(30),
              regenerateIdentity: (manager, user) => manager.GenerateUserIdentityAsync(user))
          }
      });
      app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);

      // Enables the application to temporarily store user information when they are verifying the second factor in the two-factor authentication process.
      app.UseTwoFactorSignInCookie(DefaultAuthenticationTypes.TwoFactorCookie, TimeSpan.FromMinutes(5));

      // Enables the application to remember the second login verification factor such as phone or email.
      // Once you check this option, your second step of verification during the login process will be remembered on the device where you logged in from.
      // This is similar to the RememberMe option when you log in.
      app.UseTwoFactorRememberBrowserCookie(DefaultAuthenticationTypes.TwoFactorRememberBrowserCookie);

      // Uncomment the following lines to enable logging in with third party login providers
      //app.UseMicrosoftAccountAuthentication(
      //    clientId: "",
      //    clientSecret: "");

      //app.UseTwitterAuthentication(
      //   consumerKey: "",
      //   consumerSecret: "");

      //app.UseFacebookAuthentication(
      //   appId: "",
      //   appSecret: "");

      //app.UseGoogleAuthentication(new GoogleOAuth2AuthenticationOptions()
      //{
      //    ClientId = "",
      //    ClientSecret = ""
      //});
    }
  }
}