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The large majority of these have been introduced by recent commits done
in the v18 development cycle.
Author: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/9a7763ab-5252-429d-a943-b28941e0e28b@gmail.com
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The tests introduced by commit 76563f88cfb only work when Unix-domain
sockets are available. This is optional on Windows, and buildfarm
member drongo runs without them. To fix, skip the test if Unix-domain
sockets are not enabled.
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SCRAM pass-through should not bypass the FDW security check as it was
implemented for postgres_fdw in commit 761c79508e7.
This commit improves the security check by adding new SCRAM
pass-through checks to ensure that the required SCRAM connection
options are not overwritten by the user mapping or foreign server
options. This is meant to match the security requirements for a
password-using connection.
Since libpq has no SCRAM-specific equivalent of
PQconnectionUsedPassword(), we enforce this instead by making the
use_scram_passthrough option of postgres_fdw imply
require_auth=scram-sha-256. This means that if use_scram_passthrough
is set, some situations that might otherwise have worked are
preempted, for example GSSAPI with delegated credentials. This could
be enhanced in the future if there is desire for more flexibility.
Reported-by: Jacob Champion <jacob.champion@enterprisedb.com>
Author: Matheus Alcantara <mths.dev@pm.me>
Co-authored-by: Jacob Champion <jacob.champion@enterprisedb.com>
Reviewed-by: Jacob Champion <jacob.champion@enterprisedb.com>
Discussion: https://www.postgresql.org/message-id/flat/CAFY6G8ercA1KES%3DE_0__R9QCTR805TTyYr1No8qF8ZxmMg8z2Q%40mail.gmail.com
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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
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