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Area: Episerver CMS
Applies to versions: 10 and higher
Other versions:

Configuring mixed-mode OWIN authentication

A common use case for mixed-mode authentication is having ADFS for your back-end users and another authentication provider for website users. Configuring mixed-mode authentication for the Episerver platform requires the following NuGet packages as dependencies:

  • Microsoft.Owin.Security.Cookies
  • Microsoft.Owin.Host.SystemWeb
  • Microsoft.Owin.Security.WsFederation

To configure mixed-mode OWIN authentication, set the authentication type in the system.web section of the web.config.

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

To configure mixed-mode authentication, also 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
      {
	const string LogoutUrl = "/util/logout.aspx";
				
        // For more information on configuring authentication, please visit http://go.microsoft.com/fwlink/?LinkId=301864
        public void ConfigureAuth(IAppBuilder app)
          {
            // This will configure cookie authentication at the following urls.  
            // In those pages you are responsible for authentication and calling 
            // the OwinContext.Authentication.SignIn method to properly sign in the user
            // and OwinContext.Authentication.SignOut to logout a user
            app.UseCookieAuthentication(new CookieAuthenticationOptions
              {
                AuthenticationType = "Application",
		LoginPath = new PathString("/Login"),
		LogoutPath = new PathString("/Logout")
              });

            //This will set ADFS as the default authentication provider 
            app.SetDefaultSignInAsAuthenticationType(WsFederationAuthenticationDefaults.AuthenticationType);
            app.UseCookieAuthentication(new CookieAuthenticationOptions
              {
                AuthenticationType = WsFederationAuthenticationDefaults.AuthenticationType
              });
            //Enable federated authentication
            app.UseWsFederationAuthentication(new WsFederationAuthenticationOptions()
              {
                //Trusted URL to federation server meta data
                MetadataAddress = "https://devdc.dev.test/federationmetadata/2007-06/federationmetadata.xml",
                //Value of Wtreal must *exactly* match what is configured in the federation server
                Wtrealm = "https://localhost:44303/",
                Notifications = new WsFederationAuthenticationNotifications()
                  {
                    RedirectToIdentityProvider = (ctx) =>
                      {
                        //To avoid a redirect loop to the federation server send 403 when user is authenticated but does not have access
                        if (ctx.OwinContext.Response.StatusCode == 401 && ctx.OwinContext.Authentication.User.Identity.IsAuthenticated)
                          {
                            ctx.OwinContext.Response.StatusCode = 403;
                            ctx.HandleResponse();
                          }
                            return Task.FromResult(0);
                        },
                      SecurityTokenValidated = (ctx) =>
                        {
                          //Ignore scheme/host name in redirect Uri to make sure a redirect to HTTPS does not redirect back to HTTP
                          var redirectUri = new Uri(ctx.AuthenticationTicket.Properties.RedirectUri, UriKind.RelativeOrAbsolute);
                          if (redirectUri.IsAbsoluteUri)
                            {
                              ctx.AuthenticationTicket.Properties.RedirectUri = redirectUri.PathAndQuery;
                            }
                            //Sync user and the roles to EPiServer in the background
                            ServiceLocator.Current.GetInstance().SynchronizeAsync(ctx.AuthenticationTicket.Identity);
                            return Task.FromResult(0);
                          }
                        }
                      });
                    // Add stage marker to make sure WsFederation runs on Authenticate (before URL Authorization and virtual roles)
                      app.UseStageMarker(PipelineStage.Authenticate);

                      //Remap logout to a federated logout
                      app.Map(LogoutUrl, map =>
                        {
                          map.Run(ctx =>
                            {
                              ctx.Authentication.SignOut();
                              return Task.FromResult(0);
                            });
                      });

            //Tell antiforgery to use the name claim
            AntiForgeryConfig.UniqueClaimTypeIdentifier = ClaimTypes.Name;
          }
      }
  }

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Last updated: Oct 27, 2016