Any way to customize token endpoint when using Microsoft.AspNetCore.Authentication.OpenIdConnect middleware in ASP.NET Core

Question

I'm trying to authenticate using an identity provider that has its token endpoint on /profile/oidc/token instead of the usual /oauth/token endpoint. Is there any way to customize this? I'm always getting an error when exchanging the code for an access token.

Something like this? services.AddAuthentication(options => { options.DefaultChallengeScheme = "CustomProvider"; }).AddOAuth("CustomProvider", options => { options.ClientId = Configuration["ClientId"]; options.ClientSecret = Configuration["ClientSecret"]; options.AuthorizationEndpoint = "<your custom authorization endpoint>"; options.TokenEndpoint = "<your custom token endpoint>"; }); — SoftwareDveloper
– SoftwareDveloper, Commented Mar 13 at 14:08

Tore Nestenius · Accepted Answer · 2025-03-13 15:28:55Z

0

You can override some of the URL's in AddOpenIDConnect by adding your own custom event handlers.

For example:

AddOpenIdConnect(options =>
{
   ...
   options.Events.OnRedirectToIdentityProviderForSignOut = context =>
   {
       context.ProtocolMessage.IssuerAddress =
                                "https://localhost:7001/connect/endsession";
       return Task.CompletedTask;
   };
});

I did explain this in a bit more detail in a blog post about: IdentityServer In Docker Containers (part 4/4)

answered Mar 13 at 15:28

Tore Nestenius

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