// Custom autenticator class.  
// Note: For brevity, some details are intentionally omitted.  

public class TestAuthenticator : CustomAuthenticator
{
   // Empty constructor required 
   public TestAuthenticator() : base()
   {
   }

   protected override IIdentity AuthenticateTokenCore(AuthenticationContext context)
   {
       string userName = String.Empty;
       string portalConnectionInfo = null;
       // Assuming the token is contained in the request header 
       string token = context.Context.Request.Headers["token"];

       System.Configuration.Configuration webConfig =
           System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(null);

       // This exampel relies on custom settings. 
       if (0 < webConfig.AppSettings.Settings.Count)
       {
           System.Configuration.KeyValueConfigurationElement customSetting =
               webConfig.AppSettings.Settings["PortalConnectionInfo"];

           // Required setting throw exception if it doesn't exist. 
           if (null != customSetting)
           {
               portalConnectionInfo = customSetting.Value;
           }
           else
           {
               // Error, throw exception
           }
       }
       else
       {
           // Error, throw exception
       }

       //  
       // Authenticate against the Portal server using 
       // portalConnectionInfo, assign the user name 
       // corresponding to the <c>token</c> to the  
       // <c>userName</c> parameter.  
       //  

       // Use the CreateIdentity helper method to create an 
       // IIdentity object of correct type.  
       return CreateIdentity(userName);
   }
}

// Custom autenticator class.  
// Note: For brevity, some details are intentionally omitted.  

public class TestAuthenticator : CustomAuthenticator
{
   // Empty constructor required 
   public TestAuthenticator() : base()
   {
   }

   protected override IIdentity AuthenticateTokenCore(AuthenticationContext context)
   {
       string userName = String.Empty;
       string portalConnectionInfo = null;
       // Assuming the token is contained in the request header 
       string token = context.Context.Request.Headers["token"];

       System.Configuration.Configuration webConfig =
           System.Web.Configuration.WebConfigurationManager.OpenWebConfiguration(null);

       // This exampel relies on custom settings. 
       if (0 < webConfig.AppSettings.Settings.Count)
       {
           System.Configuration.KeyValueConfigurationElement customSetting =
               webConfig.AppSettings.Settings["PortalConnectionInfo"];

           // Required setting throw exception if it doesn't exist. 
           if (null != customSetting)
           {
               portalConnectionInfo = customSetting.Value;
           }
           else
           {
               // Error, throw exception
           }
       }
       else
       {
           // Error, throw exception
       }

       //  
       // Authenticate against the Portal server using 
       // portalConnectionInfo, assign the user name 
       // corresponding to the <c>token</c> to the  
       // <c>userName</c> parameter.  
       //  

       // Use the CreateIdentity helper method to create an 
       // IIdentity object of correct type.  
       return CreateIdentity(userName);
   }
}