Can i authenticate without PAM

["nitin k bhardwaj" <nitin_kumar82@rediffmail.com>]

Hello,

If anyone can help... I have an old slackware linux configuration 
running .
It has got nss ,but no PAM support available.
My question is can i still authenticate with openldap particularly 
the login prog.?
If not then wot the least do i need.?

thanks in advance