On Fri, Nov 15, 2013 at 02:16:52PM -0800, Adrian Klaver wrote:
> On 11/15/2013 11:49 AM, Marko Kreen wrote:
> >On Fri, Nov 15, 2013 at 11:16:25AM -0800, Adrian Klaver wrote:
> >>The description of the GUCs show up in the documentation but I am
> >>not seeing the GUCs themselves in postgresql.conf, so I could test
> >>no further. It is entirely possible I am missing a step and would
> >>appreciate enlightenment.
> >
> >Sorry, I forgot to update sample config.
> >
> >ssl-prefer-server-cipher-order-v2.patch
> >- Add GUC to sample config
> >- Change default value to 'true', per comments from Alvaro and Magnus.
> >
> >ssl-ecdh-v2.patch
> >- Add GUC to sample config
> >
>
> Well that worked.
> I made ssl connections to the server using psql and verified it
> respected the order of ssl_ciphers. I do not have a client available
> with a different view of cipher order so I cannot test that.
Well, these are GUC patches so the thing to test is whether the GUCs work.
ssl-prefer-server-cipher-order: Use non-standard cipher order in server, eg: RC4-SHA:DHE-RSA-AES128-SHA, see if on/off
works. You can see OpenSSL default order with "openssl ciphers -v".
ssl-ecdh: It should start using ECDHE-RSA immediately. Also see if adding !ECDH to ciphers will fall back to DHE.
It'skind of hard to test the ssl_ecdh_curve as you can't see it anywhere. I tested it by measuring if bigger curve
slowedconnecting down...
Bonus - test EC keys: $ openssl ecparam -name prime256v1 -out ecparam.pem $ openssl req -x509 -newkey
ec:ecparam.pem-days 9000 -nodes \ -subj '/C=US/ST=Somewhere/L=Test/CN=localhost' \ -keyout server.key -out
server.crt
ssl-better-default: SSL should stay working, openssl ciphers -v 'value' should not contain any weak suites (RC4, SEED,
DES-CBC,EXP, NULL) and no non-authenticated suites (ADH/AECDH).
--
marko
