Horton

Re: [PoC] Federated Authn/z with OAUTHBEARER

Thomas Munro <thomas.munro@gmail.com>

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From: Thomas Munro <thomas.munro@gmail.com>
To: Jacob Champion <jchampion@timescale.com>
Cc: "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, mahendrakar s <mahendrakarforpg@gmail.com>, Andrey Chudnovsky <achudnovskij@gmail.com>, "hlinnaka@iki.fi" <hlinnaka@iki.fi>, "michael@paquier.xyz" <michael@paquier.xyz>, "smilingsamay@gmail.com" <smilingsamay@gmail.com>, Stephen Frost <sfrost@snowman.net>
Date: 2023-07-06T20:47:47Z
Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

  1. meson: Fix install-quiet after clean

  2. oauth: Run Autoconf tests with correct compiler flags

  3. Link libpq with libdl if the platform needs that.

  4. Doc: correct spelling of meson switch.

  5. oauth: Correct SSL dependency for libpq-oauth.a

  6. oauth: Fix Autoconf build on macOS

  7. oauth: Move the builtin flow into a separate module

  8. Remove a stray "pgrminclude" annotation

  9. oauth: Simplify copy of PGoauthBearerRequest

  10. oauth: Improve validator docs on interruptibility

  11. oauth: Disallow synchronous DNS in libcurl

  12. oauth: Fix postcondition for set_timer on macOS

  13. oauth: Use IPv4-only issuer in oauth_validator tests

  14. Work around OAuth/EVFILT_TIMER quirk on NetBSD.

  15. oauth: Fix incorrect const markers in struct

  16. Add missing entry to oauth_validator test .gitignore

  17. cirrus: Temporarily fix libcurl link error

  18. Add support for OAUTHBEARER SASL mechanism

  19. libpq: Handle asynchronous actions during SASL

  20. require_auth: prepare for multiple SASL mechanisms

  21. Move PG_MAX_AUTH_TOKEN_LENGTH to libpq/auth.h

  22. Make SASL max message length configurable

  23. jsonapi: fully initialize dummy lexer

  24. common/jsonapi: support libpq as a client

  25. Remove fe_memutils from libpgcommon_shlib

  26. Revert ECPG's use of pnstrdup()

  27. Explicitly require password for SCRAM exchange

  28. Refactor SASL exchange to return tri-state status

On Fri, Jul 7, 2023 at 4:57 AM Jacob Champion <jchampion@timescale.com> wrote:
> On Wed, Jul 5, 2023 at 3:07 PM Thomas Munro <thomas.munro@gmail.com> wrote:
> > 2.  Convert those events into new libpq events like 'I want you to
> > call me back in 100ms', and 'call me back when socket #42 has data',
> > and let clients handle that by managing their own poll set etc.  (This
> > is something I've speculated about to support more efficient
> > postgres_fdw shard query multiplexing; gotta figure out how to get
> > multiple connections' events into one WaitEventSet...)
>
> Something analogous to libcurl's socket and timeout callbacks [1],
> then? Or is there an existing libpq API you were thinking about using?

Yeah.  Libpq already has an event concept.  I did some work on getting
long-lived WaitEventSet objects to be used in various places, some of
which got committed[1], but not yet the parts related to postgres_fdw
(which uses libpq connections to talk to other PostgreSQL servers, and
runs into the limitations of PQsocket()).  Horiguchi-san had the good
idea of extending the event system to cover socket changes, but I
haven't actually tried it yet.  One day.

> > Or, more likely in the
> > first version, you just can't do it at all...  Doesn't seem that bad
> > to me.
>
> Any initial opinions on whether it's worse or better than a worker thread?

My vote is that it's perfectly fine to make a new feature that only
works on some OSes.  If/when someone wants to work on getting it going
on Windows/AIX/Solaris (that's the complete set of no-epoll, no-kqueue
OSes we target), they can write the patch.

[1] https://www.postgresql.org/message-id/flat/CA%2BhUKGJAC4Oqao%3DqforhNey20J8CiG2R%3DoBPqvfR0vOJrFysGw%40mail.gmail.com