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Subject: Re: Serverside SNI support in libpq
From: Daniel Gustafsson <daniel@yesql.se>
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 <CAGECzQTWH-bzHcdPo=i09TL_P6_HBBNEkBmr+rpN_J9zVfR2Fw@mail.gmail.com>
Date: Thu, 4 Dec 2025 00:27:53 +0100
Cc: Heikki Linnakangas <hlinnaka@iki.fi>,
 Dewei Dai <daidewei1970@163.com>,
 "li.evan.chao" <li.evan.chao@gmail.com>,
 Jacob Champion <jacob.champion@enterprisedb.com>,
 Michael Paquier <michael@paquier.xyz>,
 Andres Freund <andres@anarazel.de>,
 Pgsql Hackers <pgsql-hackers@lists.postgresql.org>
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To: Jelte Fennema-Nio <postgres@jeltef.nl>
Archived-At: 
 <https://www.postgresql.org/message-id/785C0B88-7068-4576-AF55-251D06CEC112%40yesql.se>
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> On 3 Dec 2025, at 22:27, Jelte Fennema-Nio <postgres@jeltef.nl> wrote:
>=20
> On Wed, 3 Dec 2025 at 17:57, Heikki Linnakangas <hlinnaka@iki.fi> =
wrote:
>>> I really want to make it possible for anyone who don't want SNI to =
keep using
>>> postgresql.conf and get the exact behavior they've always had.  Do =
you agree
>>> with that design goal?
>>=20
>> Yeah, that's fair.
>=20
> What if we make it so that if a pg_hosts.conf file exists, then the
> ssl_cert_file/ssl_key_file configs are ignored? And by default initdb
> would not create a file (or it would, but with the same default
> settings that we have now).

Maybe.  I'm not a big fan of magic-file-exist configurations but..  I'm =
trying
out a few different options to see which seems the most reasonable, and =
this is
for one of them.

> Basically it would be:
> 1. If the file does not exist, use the "off" behaviour
> 2. If the file exists, use the "strict" behaviour

It will really be "strict" *or* "default" based on whether or not '*' is =
set as
a wildcard hostname (which can be argued is just a version of strict).

--
Daniel Gustafsson