WCF Service User Identification

Question

I am creating a .NET 4.5 WCF web service for deployment on Windows Server 2008 running IIS 7.0. I want my web service to identify the users who access the service by authenticating a Kerberos token string that is passed through the web service. I can't use Integrated Windows Authentication (some of my clients are using Linux machines) so, I must pass the token string. Does anyone know how I can do the following:

1. Generate a Kerberos token string in C# .NET 4.5 based a users current identity.
2. Validate a Kerberos token string in C# .NET 4.5 and get the associate username.

Thanks!

Answer 1

You could maybe expose the service with two bindings, one for Windows-users with Windows-authentication and one for others using user name authentication. Is it an intranet or internet scanario? How are the Linux users identified?