* Tuning GnuTLS
@ 2011-07-18 3:23 Lars Magne Ingebrigtsen
2011-09-28 17:32 ` Ted Zlatanov
0 siblings, 1 reply; 6+ messages in thread
From: Lars Magne Ingebrigtsen @ 2011-07-18 3:23 UTC (permalink / raw)
To: emacs-devel
We should strive to make TLS connections as painless as possible, and
involving as little user intervention as possible, while preserving a
reasonable level of security.
So far, two failure points have been identified:
1) Some servers sends a prime with fewer bits than the accepted default.
I think the right thing to do here is to just default
`gnutls-min-prime-bits' to a lower number than the default GnuTLS
number. I don't know what that number should be, but I think people who
want better bits than that can adjust this number upwards.
2) Servers presenting broken, er, certificates with certain algorithms.
If negotiation with DHE-RSA has failed, then negotiation without that
algorithm should be attempted. But is it possible to fall back to
plain-text? I don't really know how that works. But if that's
possible, the fall-back should obviously stop before it gets that far.
After a priority has been established, I then think that the priority
for this specific server/port pair should be saved via Customize, so
that the next connection can be done faster automatically, without the
need for all this negotiation.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog http://lars.ingebrigtsen.no/
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Tuning GnuTLS
2011-07-18 3:23 Tuning GnuTLS Lars Magne Ingebrigtsen
@ 2011-09-28 17:32 ` Ted Zlatanov
2011-10-06 19:07 ` Lars Magne Ingebrigtsen
2011-10-27 22:12 ` Ted Zlatanov
0 siblings, 2 replies; 6+ messages in thread
From: Ted Zlatanov @ 2011-09-28 17:32 UTC (permalink / raw)
To: emacs-devel
On Mon, 18 Jul 2011 05:23:16 +0200 Lars Magne Ingebrigtsen <larsi@gnus.org> wrote:
LMI> We should strive to make TLS connections as painless as possible, and
LMI> involving as little user intervention as possible, while preserving a
LMI> reasonable level of security.
LMI> So far, two failure points have been identified:
LMI> 1) Some servers sends a prime with fewer bits than the accepted default.
LMI> I think the right thing to do here is to just default
LMI> `gnutls-min-prime-bits' to a lower number than the default GnuTLS
LMI> number. I don't know what that number should be, but I think people who
LMI> want better bits than that can adjust this number upwards.
LMI> 2) Servers presenting broken, er, certificates with certain algorithms.
LMI> If negotiation with DHE-RSA has failed, then negotiation without that
LMI> algorithm should be attempted. But is it possible to fall back to
LMI> plain-text? I don't really know how that works. But if that's
LMI> possible, the fall-back should obviously stop before it gets that far.
LMI> After a priority has been established, I then think that the priority
LMI> for this specific server/port pair should be saved via Customize, so
LMI> that the next connection can be done faster automatically, without the
LMI> need for all this negotiation.
Could you ask on the GnuTLS dev list? Both of these are possible AFAICT
but perhaps they have suggestions for the implementation specifics.
Ted
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Tuning GnuTLS
2011-09-28 17:32 ` Ted Zlatanov
@ 2011-10-06 19:07 ` Lars Magne Ingebrigtsen
2011-10-10 21:46 ` Ted Zlatanov
2011-10-27 22:12 ` Ted Zlatanov
1 sibling, 1 reply; 6+ messages in thread
From: Lars Magne Ingebrigtsen @ 2011-10-06 19:07 UTC (permalink / raw)
To: emacs-devel
Ted Zlatanov <tzz@lifelogs.com> writes:
> Could you ask on the GnuTLS dev list? Both of these are possible AFAICT
> but perhaps they have suggestions for the implementation specifics.
Is the gnutls-devel@gnu.org the right list?
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog http://lars.ingebrigtsen.no/
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: Tuning GnuTLS
2011-09-28 17:32 ` Ted Zlatanov
2011-10-06 19:07 ` Lars Magne Ingebrigtsen
@ 2011-10-27 22:12 ` Ted Zlatanov
2011-11-03 20:12 ` Lars Magne Ingebrigtsen
1 sibling, 1 reply; 6+ messages in thread
From: Ted Zlatanov @ 2011-10-27 22:12 UTC (permalink / raw)
To: emacs-devel
On Wed, 28 Sep 2011 12:32:56 -0500 Ted Zlatanov <tzz@lifelogs.com> wrote:
TZ> On Mon, 18 Jul 2011 05:23:16 +0200 Lars Magne Ingebrigtsen <larsi@gnus.org> wrote:
LMI> We should strive to make TLS connections as painless as possible, and
LMI> involving as little user intervention as possible, while preserving a
LMI> reasonable level of security.
LMI> So far, two failure points have been identified:
LMI> 1) Some servers sends a prime with fewer bits than the accepted default.
LMI> I think the right thing to do here is to just default
LMI> `gnutls-min-prime-bits' to a lower number than the default GnuTLS
LMI> number. I don't know what that number should be, but I think people who
LMI> want better bits than that can adjust this number upwards.
LMI> 2) Servers presenting broken, er, certificates with certain algorithms.
LMI> If negotiation with DHE-RSA has failed, then negotiation without that
LMI> algorithm should be attempted. But is it possible to fall back to
LMI> plain-text? I don't really know how that works. But if that's
LMI> possible, the fall-back should obviously stop before it gets that far.
LMI> After a priority has been established, I then think that the priority
LMI> for this specific server/port pair should be saved via Customize, so
LMI> that the next connection can be done faster automatically, without the
LMI> need for all this negotiation.
TZ> Could you ask on the GnuTLS dev list? Both of these are possible AFAICT
TZ> but perhaps they have suggestions for the implementation specifics.
Ping? I haven't seen anything on the GnuTLS dev list. Do you want me to
ask?
Thanks
Ted
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-11-03 20:12 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-07-18 3:23 Tuning GnuTLS Lars Magne Ingebrigtsen
2011-09-28 17:32 ` Ted Zlatanov
2011-10-06 19:07 ` Lars Magne Ingebrigtsen
2011-10-10 21:46 ` Ted Zlatanov
2011-10-27 22:12 ` Ted Zlatanov
2011-11-03 20:12 ` Lars Magne Ingebrigtsen
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