Infinite re-direct loop after AAD Authentication when redirect is specified

Question

If I specify a redirect URI in my OpenIdConnectAuthenticationOptions like so

app.UseOpenIdConnectAuthentication(
            new OpenIdConnectAuthenticationOptions
            {
                ClientId = clientId,
                Authority = Authority,
                PostLogoutRedirectUri = postLogoutRedirectUri,
                RedirectUri = redirectUri,

                Notifications = new OpenIdConnectAuthenticationNotifications()
                {
                    AuthenticationFailed = context =>
                    {
                        context.HandleResponse();
                        context.Response.Redirect("/Error?message=" + context.Exception.Message);
                        return Task.FromResult(0);
                    }
                }
            });

Then I get an infinite re-direct loop. This only happens though when i put it on and standalone IIS Server (our test server). If i remove all the Replay url's in AAD and leave it only setup for the test server, and remove the "RedirectUri = redirectUri," from the above my problem goes away.

I have a fiddler log here : https://drive.google.com/file/d/0B5Ap95E_wdyAa0RLLWloZ0dCaGM/view?usp=sharing

It appears that when request from AAD comes back to my app, before the token is grabbed and used, the Middle Ware is just bouncing it right back with a 302. Also what may be important, I have the [Authorize] attribute over the mvc controller that the routing and return uri directs to. If I remove it i do not get this issue.

[UPDATE] I tried moving the application to my localhost install of IIS rather than using iisexpress so that i could setup as a SubApplication like it is on my iis server. On my localhost it does the same infinite loop. I added in some telemetry custom events on an override of the [Authorize] attribute and have been able to discover that when page is re-directed back to the application after authentication httpContext.user.identity.IsAuthenticated = false. So somehow the OWIN middle ware is not setting this to true?

Thanks for any help!

Answer 1

I was able to find a solution to my problem. Originally i was specifying my reply url's to point to the root of the site. My rout config looks like this:

routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Welcome", action = "Index", id = UrlParameter.Optional }
        );

If I append "Welcome" to the end of my reply url it works. For some reason if i leave the reply url to the root of the site and have the default route picked up it just goes into an infinite loop.

I found out also that this only applies to a sub application of a site. I tried moving my application to be a standalone site in iis so rather than and I didnt have to add the controller name in the reply url.

Example:
Original reply url: mysite.mydomain.com/CustomApp

New Reply url: mysite.mydomain.com/CustomApp/Welcome

Hope someone else can find this useful!

UPDATE

I found out that the root of the problem was still caused from this mvc5 bug: katanaproject.codeplex.com/workitem/197. I thought it had been fixed but it has not, so i will continue to use the well known Kentor Owin Cookie Saver: github.com/Sustainsys/owin-cookie-saver