IdentityServer4 IdentityServer3.AccessTokenValidation

Question

Happy new year to everyone...

I configured an IdentityServer4, and I can make successful ASP.net Core web api calls. But for asp.net framework 4.5.2 web apis, I got

Answer 1

Remove the following line in the WebAPI accesstoken validation middleware.

ValidationMode = ValidationMode.ValidationEndpoint

The result should look like this:

app.UseIdentityServerBearerTokenAuthentication(new IdentityServerBearerTokenAuthenticationOptions 
{
     Authority = "http://www.abcdefgh.com:5000",
     RequiredScopes = new[] { "AuthorizationWebApiNETFramework" }
});

Answer 2

In my case, I enabled the log following this: https://identityserver.github.io/Documentation/docsv2/consuming/diagnostics.html

By default Katana uses the TraceSource mechanism in .NET for logging. Add the following snippet to your config file to enable logging to a file:

<system.diagnostics>
  <trace autoflush="true" />

  <sources>
    <source name="Microsoft.Owin">
      <listeners>
        <add name="KatanaListener" />
      </listeners>
    </source>
  </sources>

  <sharedListeners>
    <add name="KatanaListener"
          type="System.Diagnostics.TextWriterTraceListener"
          initializeData="katana.trace.log"
          traceOutputOptions="ProcessId, DateTime" />
  </sharedListeners>

  <switches>
    <add name="Microsoft.Owin"
          value="Verbose" />
  </switches>
</system.diagnostics>

Then I saw the root cause in WebAPI folder log file "katana.trace.log":

    Microsoft.Owin.Security.OAuth.OAuthBearerAuthenticationMiddleware Error: 0 : Authentication failed
System.IO.FileLoadException: Could not load file or assembly 'Newtonsoft.Json, Version=8.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
File name: 'Newtonsoft.Json, Version=8.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed'
   at IdentityServer3.AccessTokenValidation.ValidationEndpointTokenProvider.<ReceiveAsync>d__1.MoveNext()
   at System.Runtime.CompilerServices.AsyncTaskMethodBuilder.Start[TStateMachine](TStateMachine& stateMachine)
   at IdentityServer3.AccessTokenValidation.ValidationEndpointTokenProvider.ReceiveAsync(AuthenticationTokenReceiveContext context)
   at Microsoft.Owin.Security.OAuth.OAuthBearerAuthenticationHandler.<AuthenticateCoreAsync>d__0.MoveNext()

After I upgraded the Newtonsoft.Json from 6.0 to 9.01, it worked.