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SecurityTokenException: No token validator was found for the given token.

I have an ASP.NET Core application that is using WSFederation as authentication protocol. The application authenticates through our internal ADFS server where a corresponding Relying Party is configured. When attempting to authenticate, the ASP.NET Core application returns the following error message:

SecurityTokenException: No token validator was found for the given token.

Here is the full error page:

I had a look at the application configuration, but everything looked fine there:

services.AddAuthentication(options =>
{
options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;
options.DefaultSignInScheme = CookieAuthenticationDefaults.AuthenticationScheme;
options.DefaultChallengeScheme = WsFederationDefaults.AuthenticationScheme;
})
.AddWsFederation(options =>
{
options.Wtrealm = "https://exampleapp";
options.MetadataAddress = "https://adfs.example.be/federationmetadata/2007-06/federationmetadata.xml";
})
.AddCookie();
view raw gistfile1.txt hosted with ❤ by GitHub

The issue turned out to be related to the Relying Party configuration in ADFS. I had enabled token encryption there but this is not supported by the WSFederation middleware in ASP.NET Core.

Here is how to fix it:

  • Go to your ADFS server
  • Open ADFS Management
  • Go to Relying Parties and click on the Relying Party you want to configure
  • Go to the Encryption tab and click Remove to delete the existing certificate

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