system.identityModel not detected in web.config - asp.net-core

Question

I have an ASP.NET Core 1.0 project running. When I add the ClaimsPrinciplePermission attribute to my action methods I get the following error when navigating to any action method having that attribute.
An exception of type 'System.InvalidOperationException' occurred in
System.IdentityModel.Services.dll but was not handled in user code
Additional information: ID7024: Use of ClaimsPrincipalPermission
attribute has been attempted and possibly there is no
configuration section defined, see inner
exception for details. Also make sure a ClaimsAuthorizationManager
element is defined under the section.
This is the inner exception
ID7027: Could not load the identity configuration because no
configuration section was found.
This is my web.config
<?xml version="1.0" encoding="utf-8"?>
<configuration>
<!--
Configure your application settings in appsettings.json. Learn more at http://go.microsoft.com/fwlink/?LinkId=786380
-->
<configSections>
<section name="system.identityModel" type="System.IdentityModel.Configuration.SystemIdentityModelSection, System.IdentityModel, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
<section name="system.identityModel.services" type="System.IdentityModel.Services.Configuration.SystemIdentityModelServicesSection, System.IdentityModel.Services, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" />
</configSections>
<system.identityModel.services>
<federationConfiguration>
<cookieHandler requireSsl="false" />
</federationConfiguration>
</system.identityModel.services>
<system.identityModel>
<identityConfiguration>
<claimsAuthorizationManager type="wApp.ClaimManager, wApp" />
</identityConfiguration>
</system.identityModel>
<system.webServer>
<handlers>
<add name="aspNetCore" path="*" verb="*" modules="AspNetCoreModule" resourceType="Unspecified"/>
</handlers>
<aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" stdoutLogEnabled="false" stdoutLogFile=".\logs\stdout" forwardWindowsAuthToken="false"/>
</system.webServer>
</configuration>
As you can see, I have added all the required sections. The same code and configuration works well in my MVC 5 projects and also my Web Api project. Is there something different to be done in Asp.Net Core projects?
I have also added the required DLL references in the Core 1.0 MVC project as well duplicated the same configuration sections in the App.config file under the core 1.0 MVC project. Still getting the same error.
What am I missing?

Answer 1

ClaimsPrincipalPermission, and WIF/System.IdentityModel is not part of .NET Core at all. I'm surprised that even compiles.
From the comments it appears you're parsing a JWT, presumably with the JWT bearer token middleware.
So, all identities in ASP.NET Core are ClaimsIdentities. You can go for Simple claims based checks, or, more fully to code expressed policies which give a lot more flexibility.