ssh version of ruserok()

Hello,

Is there a replacement for ruserok() which uses ssh to authenticate the
user instead of rsh?

I've searched for an answer to this question for a couple of days now.
I find a few places where others have asked the exact same question,
but no replies of any kind.

If this is a dumb question, would someone be kind enough to point out why?

Thanks,
Tim Sirianni
Silicon Graphics, Inc.