gitlab-org--gitlab-foss/changelogs/unreleased/53659-use-padded-key-for-gcm-ciphers.yml

---
title: Fix web hook functionality when the database encryption key is too short
merge_request: 23573
author:
type: fixed
Use a 32-byte version of db_key_base for web hooks AES-256-GCM cipher mode requires a key that is exactly 32 bytes long. We already handle the case when the key is too long, by truncating, but the key can also be too short in some installations. Switching to a key that is always exactly the right length (by virtue of right-padding ASCII 0 characters) allows encryption to proceed, without breaking backward compatibility. When the key is too short, encryption fails with an `ArgumentError`, causing the web hooks functionality to be unusable. As a result, zero rows can exist with values encrypted with the too-short key. When the key is too long, it is silently truncated. In this case, the key is unchanged, so values encrypted with the new too-long key will still be successfully decrypted. 2018-12-04 18:54:29 -05:00			`---`
			`title: Fix web hook functionality when the database encryption key is too short`
			`merge_request: 23573`
			`author:`
			`type: fixed`