Token from identity server connection\token is not valid for my API

Question

I am getting a token from my identityserver 4 via url connection/token with a POST request:

Then I copy/paste the value of the access_token key to my API GET request as a header:

mytokenstring

eyJhbGciOiJSUzI1NiIsImtpZCI6IkYxMDhCODA2NUNFMTRBOEEwOTZBODUyMkIxQUNBMkFDMTdEQjQwNEEiLCJ0eXAiOiJKV1QiLCJ4NXQiOiI4UWk0Qmx6aFNvb0phb1Vpc2F5aXJCZmJRRW8ifQ.eyJuYmYiOjE1MDg1OTU5MzIsImV4cCI6MTUwODU5OTUzMiwiaXNzIjoiaHR0cDovL2xvY2FsaG9zdDo2NTUzNSIsImF1ZCI6WyJodHRwOi8vbG9jYWxob3N0OjY1NTM1L3Jlc291cmNlcyIsInRlYWNoZXJzX3Rlc3RfcGxhbm5lciJdLCJjbGllbnRfaWQiOiJ0ZWFjaGVyc190ZXN0X3BsYW5uZXIiLCJzY29wZSI6WyJ0ZWFjaGVyc190ZXN0X3BsYW5uZXIiXX0.g2x31JcYrXyIavfxCu7UKY3kndznI_gYHJYCxl0dQn3u7l7vWo6qKr13XYMo6P1Lqtu68T2FEXL-5kyS0XwFClpdJE6m13-hfKZsd2QHBmOlgZ2ANwghXW4hfU5nWiwkUACwkP9wfDCULV3oQm5i49L5TQmUiiqcy0TTS2FDBdS5ymFBi1bCKnPh5ErsD8V_4eTqLzxv8CyVkPx2gPd6aBIf_2JNrjrMrrm69kghOHnktVG17KPQhppbIeJO8RP-URiJUJGXIY09yRGVF7YXtkFj-I5QOMvNIAWgUeqNYqH0cuQol9nglA4mtU1MfXtnRoEpRRzGViw7gxJ_-MFadA

Authorization: Bearer mytokenstring

What can cause that the token from the identity server is not valid for my API?

I get a 401 error with POSTMAN

Looking into the output of the kestrel server I get this:

Api> fail: Microsoft.AspNetCore.Server.IISIntegration.IISMiddleware[0]
Api>       'MS-ASPNETCORE-TOKEN' does not match the expected pairing token '52da49ee-6599-483a-b97a-15ced1603005', request rejected.

What do I wrong and what pairing token Guid is that?

API HttpGet:

header:

Authorization Bearer eyJh...UntilTheEndOfTheString

IdentityServer setup:

public void ConfigureServices(IServiceCollection services)
{
    string certificateFilePath = Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "certifiateselfsigned.pfx");

    var certificate = new X509Certificate2(certificateFilePath, "test");

    services.AddIdentityServer()
    .AddSigningCredential(certificate)
        .AddInMemoryApiResources(InMemoryConfiguration.GetApiResources())
        .AddInMemoryClients(InMemoryConfiguration.GetClients())
        .AddTestUsers(InMemoryConfiguration.GetUsers());

    services.AddMvc();
}

UPDATE

Api

public void ConfigureServices(IServiceCollection services)
{
    services.AddAuthentication(options =>
    {
        options.DefaultScheme = JwtBearerDefaults.AuthenticationScheme;

        })
            .AddIdentityServerAuthentication(opt =>
           {
               opt.RequireHttpsMetadata = false;
               opt.Authority = "http://localhost:65535"; // IdentityProvider => port running IDP on
               opt.ApiName = "teachers_test_planner"; // IdentityProvider => api resource name
           });

    services.AddMvc();
}

IdentityProvider

public static class InMemoryConfiguration
{
    public static List<TestUser> GetUsers()
    {
        return new List<TestUser>
    {
        new TestUser{ SubjectId = "6ed26693-b0a1-497e-aa14-7b880536920f", Username = "orders.tatum@gmail.com", Password = "mypassword",
            Claims = new List<Claim>
            {
                new Claim("family_name", "tatum")
            }
        }
    };
    }

    public static IEnumerable<ApiResource> GetApiResources()
    {
        return new List<ApiResource>
    {
        new ApiResource("teachers_test_planner", "Mein Testplaner")
    };
    }

    public static IEnumerable<IdentityResource> GetIdentyResources()
    {
        return new List<IdentityResource>
    {
        new IdentityResources.OpenId(),
        new IdentityResources.Profile(),
    };
    }

    public static IEnumerable<Client> GetClients()
    {
        return new List<Client>
    {
        new Client
        {
            ClientId = "teachers_test_planner",
            ClientSecrets = new[]{ new Secret("secret".Sha256()) },
            AllowedGrantTypes = GrantTypes.ResourceOwnerPasswordAndClientCredentials,
            AllowedScopes = new []{ "teachers_test_planner" }
        }
    };
    }
}

UPDATE 2

You can find the test project here:

https://github.com/LisaTatum/IdentityServer4Test

UPDATE 3

As nobody asked how I do the http_post to the connect/token endpoint here it is:

Answer 1

All you missed is app.UseAuthentication(). You have to add this into Configure method on Api startup.cs

public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
{
    loggerFactory.AddConsole(); // Configuration.GetSection("Logging"));
    loggerFactory.AddDebug();

    app.UseAuthentication();// The missing line

    app.UseStaticFiles();

    app.UseMvc();
}

I write the following consle app to test calling your api

class Program
{
    public static void Main(string[] args) => MainAsync().GetAwaiter().GetResult();

    private static async Task MainAsync()
    {
        // discover endpoints from metadata
        var disco = await DiscoveryClient.GetAsync("http://localhost:65535");
            
        // request token
        var tokenClient = new TokenClient(disco.TokenEndpoint, "teachers_test_client", "secret");
        var tokenResponse = await tokenClient.RequestClientCredentialsAsync("teachers_test_planner");

        if (tokenResponse.IsError)
        {
            Console.WriteLine(tokenResponse.Error);
            return;
        }

        Console.WriteLine(tokenResponse.Json);
        Console.WriteLine("\n\n");

        // call api
        var client = new HttpClient();
        client.SetBearerToken(tokenResponse.AccessToken);

        var response = await client.GetAsync("http://localhost:52129/api/values/1");
        if (!response.IsSuccessStatusCode)
        {
            Console.WriteLine(response.StatusCode);
        }
        else
        {
            var content = await response.Content.ReadAsStringAsync();
            Console.WriteLine(content);
        }
        Console.ReadKey();
    }
}

You could try on the postman, i haven't tried that

However, I had to change few more things on your project(github) to make it run on my machine. And they are

Project: IdentityProvider

• mytestplanner.pfx was not set to Copy Always

Project: Api2

• uninstall IdentityServer4 package. Why do you need IdentityServer4 on the client?
• Change target framework from <TargetFramework>net462</TargetFramework> to <TargetFramework>netcoreapp2.0</TargetFramework>, (the reason is that 4.6.2 is not installed on my machine)

Anyway, let me know if this works for you

Update

I have added the working project here