PAM pwcheck method ?


Subject: PAM pwcheck method ?
From: Etienne Goyer (etienne dot goyer at linuxquebec dot com)
Date: Tue May 06 2003 - 12:13:44 EDT


Hi there,

I am in need of a pwcheck method that can authenticate to Kerberos V
domain. Right now, I am experimenting with saslauthd+gssapi. I recall
to have seen somewhere that this is what CMU is currently using. I was
hoping that it would fit my requirements but unfortunately it is giving
me a few headaches.

According to Valgrind, there is two memory leak in the gssapi plugin to
saslauthd distributed with 2.1.13. One I sent a fix to the list, the
other I chased for a few hours without success. I can work around them
with -n0 argument to saslauthd, but this is still causing me concern.

Also, a repeatable condition which may happen in my environnement
make saslauthd segfault (this was reported to the list a few weeks ago;
nobody did a follow-up). Beside that, I found saslauthd is behaving
erratically under load. Sometime, an saslauthd process would die in my
test after serving a few hundreds or a few thousands connections.
Overall, I am not very happy about it.

I had been discussing outside the list with Michael Bacon of Duke about
similar problems he had and he sent me a patch to add PAM as a pwcheck
method to Cyrus-SASL. The patch applied and compiled without any
problem. My preliminary test where satisfying; the performance was
correct and there was no leak or instability that I could find.

So my question to the maintainers is : would it possible to consider
having a PAM pwcheck method added to Cyrus-SASL (be it Michael Bacon
patch or something else) ? I know my requirements does not dictate the
developpement agenda of Cyrus-SASL, but i think this could be useful for
many people. I also believe that, considering PAM flexibility and
robustess, it would represent a better choice over saslauthd for most
setup. Why bother with a separate process if you can do something
within a proven library ?

Thank you for considering my point of view. I hope people more
knowledgable than me could share their opinion on the subject.

-- 
Etienne Goyer                    Linux Québec Technologies Inc.
http://www.LinuxQuebec.com       etienne dot goyer at linuxquebec dot com
PGP Pub Key: http://www.LinuxQuebec.com/pubkeys/eg.key 
Fingerprint: F569 0394 098A FC70 B572  5D20 3129 3D86 8FD5 C853 







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