class auth {
        case $operatingsystem {
                "centos": {
                        $wantedpackages         = [ "openldap-clients","nss_ldap" ]
                        $pamdfiles              = [ "system-auth-ac" ]
                }                "ubuntu": {
                        $wantedpackages         = [ "openldap-utils","libnss-ldap" ]                        $pamdfiles              = [ "common-auth","common-account","common-password","common-session" ]
                }       
        }                 
        ###
        ## modify pam.d authentication system to check LDAP for passwords
        ### 
        file { "/etc/pam.d/$pamdfiles":
                owner   => root,
                group   => root,
                mode    => 644,
                source  => "puppet:///auth/pam.d/$operatingsystem/$pamdfiles",
        }               

}