WsFederation authneitcaton in .net 8

Question

We were using .Net 7 WSFederation successfully. We have now moved to .Net 8 and the authentication has stopped working. Can anybody advise what has changed?

We are using WsFederation 8.0.7 and Microsoft.IdentityModel.Tokene 8.0.0.

Our code is :-

public static IServiceCollection AddWsFederationAuthentication(this IServiceCollection services, ConfigurationManager configuration)

    {

         services.AddAuthentication(options =>

        {

            options.DefaultScheme = CookieAuthenticationDefaults.AuthenticationScheme;

            options.DefaultChallengeScheme = WsFederationDefaults.AuthenticationScheme;

        })

         .AddCookie() 

            .AddWsFederation(options =>

            {

                options.Wtrealm = "www.host.com";

                options.MetadataAddress = "https://microosftOnline etc";

                 options.Events = new WsFederationEvents

                {

                    OnAuthenticationFailed = context =>

                    {

                        // Handle authentication failure

                        context.Response.Redirect("/Host/error");

                        return Task.CompletedTask;

                    }

                };

            });

            

        return services;

    }

We get an error stating Microsoft.IdentityModel.Tokens.SecurityTokenException: No token validator or token handler was found for the given token

---> System.AggregateException: One or more errors occurred. (IDX10204: Unable to validate issuer. validationParameters.ValidIssuer is null or whitespace AND validationParameters.ValidIssuers is null or empty.) (IDX30011: Unable to read XML

Answer 1

We use SAML and I am using the latest version System.IdentityModel.Token 8.0.0