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postgres_fdw: SCRAM authentication pass-through

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This enables SCRAM authentication for postgres_fdw when connecting to
a foreign server without having to store a plain-text password on user
mapping options.

This is done by saving the SCRAM ClientKey and ServeryKey from the
client authentication and using those instead of the plain-text
password for the server-side SCRAM exchange.  The new foreign-server
or user-mapping option "use_scram_passthrough" enables this.

Co-authored-by: Matheus Alcantara <mths.dev@pm.me>
Co-authored-by: Peter Eisentraut <peter@eisentraut.org>
Discussion: https://www.postgresql.org/message-id/flat/27b29a35-9b96-46a9-bc1a-914140869dac@gmail.com
This commit is contained in:
Peter Eisentraut
2025-01-15 17:55:18 +01:00
parent b6463ea6ef
commit 761c79508e
14 changed files with 450 additions and 42 deletions
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contrib/postgres_fdw/Makefile
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@ -17,6 +17,7 @@ EXTENSION = postgres_fdw
DATA = postgres_fdw--1.0.sql postgres_fdw--1.0--1.1.sql postgres_fdw--1.1--1.2.sql
REGRESS = postgres_fdw query_cancel
TAP_TESTS = 1
ifdef USE_PGXS
PG_CONFIG = pg_config