Need to support network based authentication

Are there any libraries that can authenticate via active directory?

This is a new application, so I want to make the correct design patterns in the beginning. I want my authentication service to be a开发者_如何学Goble to support my session/cookie based authentication and active directory/ldap.

Are there any examples online that I can look over that provide the same sort of functionality? Or maybe a library?

I'm not sure if there are any java examples out there, but this site has a ton of C# examples. All of the logic would be the same. Hope this helps somewhat.

http://www.codeproject.com/KB/system/everythingInAD.aspx