Credcheck version 2.4 released

Posted on 2024-01-30 by HexaCluster
Related Open Source

Grenoble - January 30, 2024

PostgreSQL credcheck extension

The credcheck PostgreSQL extension provides few general credential checks, which will be evaluated during the user creation, during the password change and user renaming. By using this extension, we can define a set of rules:

  • allow a specific set of credentials
  • reject a certain type of credentials
  • deny password that can be easily cracked
  • enforce use of an expiration date with a minimum of day for a password
  • define a password reuse policy
  • define the number of authentication failure allowed before a user is banned
  • add a delay after all authentication failure

This release is a maintenance release to fix a major issue with the backup of the password history file with pgBackRest and adds an authentication delay feature.

  • Add authentication delay feature to be able to add a pause on authentication failure. Setting credcheck.auth_delay_ms causes the server to pause for a given number of milliseconds before reporting authentication failure. This makes brute-force attacks on database passwords more difficult. This patch is purely a copy/paste from the auth_delay extension just to limit the number of extensions to preload. See for more information about the origin of this feature.
  • Force size of file $PGDATA/global/pg_password_history to be a multiple of 8192 to fix pgBackRest error caused by the error message: "page misalignment in file /.../global/pg_password_history: file size 2604 is not divisible by page size 8192"

Extension upgrade requires a PostgreSQL restart to reload the credcheck library.

Complete list of changes and acknowledgments are available here

Links & Credits

credcheck is an open project under the PostgreSQL license created at MigOps Inc, developped and maintained at HexaCluster Corp by Gilles Darold. Any contribution to build a better tool is welcome. You can send your ideas, features requests or patches using the GitHub tools.

Links :

About credcheck

The credcheck extension is an original work of MigOps Inc, Since MigOPs is closed Gilles Darold is the official maintainer. If you need more information please contact me

Documentation at