pgsql: oauth: Reject quoted empty string in validator config

From: Daniel Gustafsson <dgustafsson(at)postgresql(dot)org>
To: pgsql-committers(at)lists(dot)postgresql(dot)org
Subject: pgsql: oauth: Reject quoted empty string in validator config
Date: 2026-11-05 20:48:42
Message-ID: E1xP4O3-00000000MXu-0y1V@gemulon.postgresql.org
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oauth: Reject quoted empty string in validator config

Commit bca67e5a3 added checking for blank validator configuration, this
completes that work by checking for a quoted empty string as well.

Backpatch down to v18 like bca67e5a3.

Author: Zsolt Parragi <zsolt(dot)parragi(at)percona(dot)com>
Reviewed-by: Daniel Gustafsson <daniel(at)yesql(dot)se>
Discussion: https://postgr.es/m/CAN4CZFP7ZMLB5Q1P4H__2d54om6fO+OEBZpWLpMwhFipobrEEw@mail.gmail.com
Backpatch-through: 18

Branch
------
REL_18_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/e83298599633528e749887b17f74fe933c552154

Modified Files
--------------
src/backend/libpq/auth-oauth.c | 16 ++++++++++++++++
src/test/modules/oauth_validator/t/001_server.pl | 7 +++++++
2 files changed, 23 insertions(+)

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