PIV badge smartcard support

In our environment, smartcard (PIV) support is now a must for access to servers. Most workers have them now but using them to access RHEL machines via SSH and GDM is not easy. Currently we are painfully adding support on an ad-hoc basic to our RHEL machines, involving packages that are not available from the mainstream repositories. We need out-of-the-box, robust support for these cards; preferably in RHEL 6.