Re: [PATCH] Automatic client certificate selection support for libpq v1

Seth Robertson <in-pgsql-hackers@baka.org> writes:
> In message <12314.1241809436@sss.pgh.pa.us>, Tom Lane writes:
>     BTW, I was reminded today that Fedora/Red Hat are hoping to standardize
>     all crypto-related functionality in their entire distro on the NSS
>     libraries:

> I am not perfectly up to speed, but switching to NSS would solve this
> (automatic client certificate selection) problem in the crypto
> library, since NSS supports a client certificate database and
> furthermore has a default callback function NSS_GetClientAuthData
> which searches the certificate database for a suitable match.

Interesting.

> It also
> supports OCSP (online certificate status protocol) which is an online
> certificate revocation check (better than the current TODO item of
> "Allow SSL CRL files to be re-read during configuration file reload,
> rather than requiring a server restart").

> Well, I guess that openssl supports OCSP as well, but the support does
> not seem as complete (no AIA support--revocation URL embedded in the
> certificate--that I can see).

Well, one of the arguments the Fedora crowd is making for NSS is that
it's more feature-complete than the other crypto libraries, so this
doesn't surprise me much.

> It is of course possible to support both at the same time (at
> compile-time, if nowhere else).

Yes, I suppose we'd not wish to just drop openssl completely.
I wonder how much code duplication would ensue from a compile-time
choice of which library to use ...
        regards, tom lane