this post was submitted on 18 Aug 2024
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Programming
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Other answers have only called out rotating the secret which is how you fix this specific failure. After you’ve rotated, delete the key from the repo because secrets don’t belong in repos. Next look at something like git-secrets or gitleaks to use as a local pre-commit hook to help prevent future failures. You’re human and you’re going to make mistakes; plan for them.
Another good habit to be in is to only access secrets from environment variables. I personally use direnv whose configuration file is globally ignored via the core.excludesfile.
You can add other strategies for good defense-in-depth such as a pre-receive hook checking for secrets to ensure no one can push them (eg they didn’t install hooks).
The smoking man clearly has engineered with humans before. Kudos for excellent advice.
I kind of think this is a bad idea because environment variables can be read from anywhere and aren't designed to be secret.
But I'm not sure what a better solution is tbh.
Storing them in files with correct permissions.
also storing them outside of the webserver directory
you’re not entirely wrong, but this is the current standard/accepted advice for local development - probably what we’re talking about given this thread is about git commits - because the chance of exploit via this mechanism requires local access… with such access, you’re pretty screwed in far more ways
Sops, or OpenBao