Where can I find a package to help configure role-based security for application components?

This is not a greenfield project, so I don't have the opportunity to implement something like this. What I need is a datastore with, say, users, roles, applications, application "areas", and other functional units, with a UI to configure each. I also need a library that wil开发者_开发问答l allow for code like:

if (!Security.HasAccess(userId, appName, functionalArea,...))
{
    throw new SecurityException("User does not have rights to...");
}

This seems like the sort of problem that gets solved over and over. Is there something out there I can buy or grab that will fulfill these requirements?

how about AzMan ? its a framework from MS to help with RBAC authorization, and it has a GUI

here`s a good starter how-to video. use the WMV download link on the right, since the player doesnt work (for me at least)