StartCom? provides RPM's for pam_pkcs11 from the download mirrors at http://www.startcom.org/?lang=en&app=15
They are available from the updates direcories, for example: ~mirror/AS-4.0.1/updates/i386/pam_pkcs11-0.5.3-1.i386.rpm
The following distributions should work:
AS-3.0.1 (compatible RHEL 3, Fedora Core 1) AS-4.0.1 (compatible RHEL 4, Fedora Core 3) ML-5.0.5 (compatible Fedora Core 5)
Other RPM's such as OpenCT, OpenSC are also available...
