Archived in favour of running sops directly for smudge and a bash script for clean. See this commit for details. This tool should not be used. I will be deleting this repository soon.
Encrypt files in git using age and ed25519 ssh keys.
I have literally no idea if this is secure, I'm not a security expert, use at your own risk. In addition to being questionably secure, it's also very untested, so it may have bugs that could result in data loss. 'm only using this to encrypt security-by-obscurity type details in mtoohey31/infra such as usernames, port numbers, public keys, and ip addresses, but not important things like passwords or private keys.
In the repository where you want to encrypt files, run:
git-crypt-agessh initThen, specify the files you want to encrypt in a .gitattributes file:
# age1b33gd26rafkrbbv7hiwroiv2890otnd2mhaseyso0uad03nv7p1vz8fpqv,9njzb5gqwv0weq0f43daw9ql9d1wwuwfifc77y9krvtofdrwll5xng59da
/secrets.nix filter=git-crypt-agessh diff=git-crypt-agessh
The comment line preceeding the rule which matches the file should contain a comma-separated list of age public keys, which can be converted from an ed25519 ssh public key with Mid92/ssh-to-age.
Finally, when you run git add, the file should be encrypted by git-crypt-agessh's clean filter. If you want to test that the file has actually be encrypted before pushing it to the actual remote, consider adding an ssh remote on your local host, pushing, and checking that the file contents are seemingly random bytes by running:
# in your home directory:
git init test-remote
cd test-remote
git checkout -b tmp # since we can't be on main while pushing to it
# in the original repository
git remote add test-remote "$(whoami)@localhost:~/test-remote"
git push test-remote
# in the test-remote repository
git checkout mainSince this remote hasn't been initialized with git-crypt-agessh, the contents of your encrypted files should still be initialized.
If you want to decrypt files in this new remote (or any other where one of the corresponding ssh private keys stored at ~/.ssh/id_ed25519 on that host), run:
rm encrypted_file
git-crypt-agessh init
git restore encrypted_fileWhen you run git restore, the filters should now be recognized, and the restored file will be decrypted.
If you want a little extra peace of mind while using this, consider initializing with git-crypt-agessh init -v; using the verbose flag will configure git-crypt-agessh so that it prints info messages whenever clean and smudge are invoked.