From: Andrew Dunstan <andrew.dunstan@2ndquadrant.com>
Subject: Re: Support for NSS as a libpq TLS backend
To: Daniel Gustafsson <daniel@yesql.se>
Cc: Postgres hackers <pgsql-hackers@lists.postgresql.org>,
 Stephen Frost <sfrost@snowman.net>
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Message-ID: <b36484f9-8632-8f92-7381-efa96e87882b@2ndQuadrant.com>
Date: Fri, 31 Jul 2020 16:44:46 -0400
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On 7/15/20 6:18 PM, Daniel Gustafsson wrote:
>> On 15 Jul 2020, at 20:35, Andrew Dunstan <andrew.dunstan@2ndquadrant.com> wrote:
>>
>> On 5/15/20 4:46 PM, Daniel Gustafsson wrote:
>>> My plan is to keep hacking at this to have it reviewable for the 14 cycle, so
>>> if anyone has an interest in NSS, then I would love to hear feedback on how it
>>> works (and doesn't work).
>> I'll be happy to help, particularly with Windows support and with some
>> of the callback stuff I've had a hand in.
> That would be fantastic, thanks!  The password callback handling is still a
> TODO so feel free to take a stab at that since you have a lot of context on
> there.
>
> For Windows, I've include USE_NSS in Solution.pm as Thomas pointed out in this
> thread, but that was done blind as I've done no testing on Windows yet.
>


OK, here is an update of your patch that compiles and runs against NSS
under Windows (VS2019).


In addition to some work that was missing in src/tools/msvc, I had to
make a few adjustments, including:


  * strtok_r() isn't available on Windows. We don't use it elsewhere in
    the postgres code, and it seemed unnecessary to have reentrant calls
    here, so I just replaced it with equivalent strtok() calls.
  * We were missing an NSS implementation of
    pgtls_verify_peer_name_matches_certificate_guts(). I supplied a
    dummy that's enough to get it building cleanly, but that needs to be
    filled in properly.


There is still plenty of work to go, but this seemed a sufficient
milestone to report progress on.


cheers


andrew


-- 
Andrew Dunstan                https://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services


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