Re: [PoC] Federated Authn/z with OAUTHBEARER

Zhihong Yu <zyu@yugabyte.com>

From: Zhihong Yu <zyu@yugabyte.com>
To: Jacob Champion <pchampion@vmware.com>
Cc: "hlinnaka@iki.fi" <hlinnaka@iki.fi>, "pgsql-hackers@postgresql.org" <pgsql-hackers@postgresql.org>, "michael@paquier.xyz" <michael@paquier.xyz>
Date: 2021-08-25T22:25:03Z
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 Wed, Aug 25, 2021 at 11:42 AM Jacob Champion <pchampion@vmware.com>
wrote:

> On Tue, 2021-06-22 at 23:22 +0000, Jacob Champion wrote:
> > On Fri, 2021-06-18 at 11:31 +0300, Heikki Linnakangas wrote:
> > >
> > > A few small things caught my eye in the backend oauth_exchange
> function:
> > >
> > > > +       /* Handle the client's initial message. */
> > > > +       p = strdup(input);
> > >
> > > this strdup() should be pstrdup().
> >
> > Thanks, I'll fix that in the next re-roll.
> >
> > > In the same function, there are a bunch of reports like this:
> > >
> > > >                    ereport(ERROR,
> > > > +                          (errcode(ERRCODE_PROTOCOL_VIOLATION),
> > > > +                           errmsg("malformed OAUTHBEARER message"),
> > > > +                           errdetail("Comma expected, but found
> character \"%s\".",
> > > > +                                     sanitize_char(*p))));
> > >
> > > I don't think the double quotes are needed here, because sanitize_char
> > > will return quotes if it's a single character. So it would end up
> > > looking like this: ... found character "'x'".
> >
> > I'll fix this too. Thanks!
>
> v2, attached, incorporates Heikki's suggested fixes and also rebases on
> top of latest HEAD, which had the SASL refactoring changes committed
> last month.
>
> The biggest change from the last patchset is 0001, an attempt at
> enabling jsonapi in the frontend without the use of palloc(), based on
> suggestions by Michael and Tom from last commitfest. I've also made
> some improvements to the pytest suite. No major changes to the OAuth
> implementation yet.
>
> --Jacob
>
Hi,
For v2-0001-common-jsonapi-support-FRONTEND-clients.patch :

+   /* Clean up. */
+   termJsonLexContext(&lex);

At the end of termJsonLexContext(), empty is copied to lex. For stack
based JsonLexContext, the copy seems unnecessary.
Maybe introduce a boolean parameter for termJsonLexContext() to signal that
the copy can be omitted ?

+#ifdef FRONTEND
+       /* make sure initialization succeeded */
+       if (lex->strval == NULL)
+           return JSON_OUT_OF_MEMORY;

Should PQExpBufferBroken(lex->strval) be used for the check ?

Thanks