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Simple GPG secrets manager
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README.md

Fidelius

Fidelius is a tool for managing GPG encrypted secrets in a git repository.

The gpg command is used to perform all encryption and decryption. Fidelius is a simple wrapper that makes working with multiple encrypted files easy, and follows some simple rules that define which files are decrypted and where the plaintext is written.

  • Paths like file.encrypted.ext.asc are decrypted to file.decrypted.ext,
  • Paths like directory.encrypted/file.ext.asc are decrypted to directory/file.ext.

These rules ensure decrypted files have the correct extension for their contents, are easy to exclude from version control with .gitignore rule (fidelius will check they are excluded!) and that decrypted files are placed where you want in your directory structure.

The last of these is partially useful when working with tools like Helm which may crash if they encounter encrypted files in their directory structure, so it can be useful to keep the encrypted files in a separate directory.

Usage

You'll need Python 3.7, Pip and GPG installed.

You can then install fidelius via pip:

pip install fidelius

This will install fidelius executable. Run fidelius --help for full usage information.

fidelius new -r 'fidelius@example.invalid' 'example.encrypted.txt.asc'
fidelius edit -r 'fidelius@example.invalid' 'example.encrypted.txt.asc'
fidelius view 'example.encrypted.txt.asc'
fidelius decrypt 'example.encrypted.txt.asc' && cat 'example.decrypted.txt'

You can also use Fidelius from another Python program. Only decryption is currently provided via this API, intended for use in CI tasks:

from fidelius.incantations import Fidelius
from fidelius.secrets import SecretKeeper
secret_keeper: SecretKeeper = Fidelius().cast()
secret_keeper.decrypt()

Rules

All files with .encrypted anywhere in the name and a .asc or .gpg suffix are decrypted into the same directory. The .asc or .gpg suffix is removed and .encrypted is replaced with .decrypted.

one.encrypted.json.asc -> one.decrypted.json

All files with a .asc or .gpg suffix in a directory named %.encrypted are decrypted into %, keeping the same relative path. Filenames have the .asc or .gpg suffix removed, and .encrypted is replaced with .decrypted. Encrypted files without .encrypted in their name have a .decrypted suffix added before the last suffix in the filename.

directory.encrypted/two.json.gpg -> directory/two.decrypted.json
directory.encrypted/three.encrypted.json.gpg -> directory/three.decrypted.json

Using with git diff

Add a .gitattributes file to your repository:

*.asc diff=fidelius

Add a custom git diff driver to ~/.gitconfig in your home directory:

[diff "fidelius"]
    textconv = "gpg --batch --quiet --decrypt"

The git diff command will now compare the plaintext of your secrets.

Alternatives

Fidelius is built to fit my own use cases perfectly, but there are several other far more mature projects for managing encrypted secrets in git repositories.

License

Licensed under the MIT License.

Author

Written by Sam Clements.

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