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GIT-SECRET(7) git-secret GIT-SECRET(7)


These steps cover the basic process of using git-secret:
Before starting, make sure you have created gpg RSA key-pair: public and secret key identified by your email address.
Begin with an existing or new git repository. You´ll use the ´git secret´ commands to add the keyrings and information to make the git-secret hide and reveal files in this repository.
Initialize the git-secret repository by running git secret init command. the .gitsecret/ folder will be created, Note all the contents of the .gitsecret/ folder should be checked in, /except/ the random_seed file. In other words, of the files in .gitsecret, only the random_seed file should be mentioned in your .gitignore file.
Add the first user to the git-secret repo keyring by running git secret tell
Now it´s time to add files you wish to encrypt inside the git-secret repository. It can be done by running git secret add <filenames...> command. Make sure these files are ignored by mentions in .gitignore, otherwise git-secret won´t allow you to add them, as these files could be stored unencrypted.
When done, run git secret hide to encrypt all files which you have added by the git secret add command.
The data will be encrypted with the public-keys described by the git secret tell command. After using git secret hide to encrypt your data, it is safe to commit your changes. NOTE:. It´s recommended to add git secret hide command to your pre-commit hook, so you won´t miss any changes.
Later you can decrypt files with the git secret reveal command, or just show their contents to stdout with the git secret cat command. If you used a password on your GPG key (always recommended), it will ask you for your password. And you´re done!

Get their gpg public-key. You won´t need their secret key.
Import this key into your gpg setup (in ~/.gnupg or similar) by running gpg --import KEY_NAME.txt
Now add this person to your secrets repo by running git secret tell (this will be the email address associated with the public key)
The newly added user cannot yet read the encrypted files. Now, re-encrypt the files using git secret reveal; git secret hide -d, and then commit and push the newly encrypted files. (The -d options deletes the unencrypted file after re-encrypting it). Now the newly added user be able to decrypt the files in the repo using git-secret.

Note that it is possible to add yourself to the git-secret repo without decrypting existing files. It will be possible to decrypt them after re-encrypting them with the new keyring. So, if you don´t want unexpected keys added, you can configure some server-side security policy with the pre-receive hook.

You can configure the version of gpg used, or the extension your encrypted files use, to suit your workflow better. To do so, just set the required variable to the value you need. This can be done in your shell environment file or with each git-secret command.

The settings available to be changed are:

  • $SECRETS_GPG_COMMAND - sets the gpg alternatives, defaults to gpg. It can be changed to gpg, gpg2, pgp, /usr/local/gpg or any other value. After doing so rerun the tests to be sure that it won´t break anything. Tested to be working with: gpg, gpg2.
  • $SECRETS_EXTENSION - sets the secret files extension, defaults to .secret. It can be changed to any valid file extension.
  • $SECRETS_DIR - sets the directory where git-secret stores its files, defaults to .gitsecret. It can be changed to any valid directory name.

This folder contains information about the files encrypted by git-secret, and about which public/private key sets can access the encrypted data.

You can change the name of this directory using the SECRETS_DIR environment variable.

Use the various ´git secret´ commands to manipulate the files in .gitsecret, you should not change the data in these files directly.

Exactly which files exist in the .gitsecret folder and what their contents are vary slightly across different versions of gpg. Thus it is best to use git-secret with the same version of gpg being used by all users. This can be forced using SECRETS_GPG_COMMAND environment variable.

Specifically, there is an issue between gpg version 2.1.20 and later versions which can cause problems reading and writing keyring files between systems (this shows up in errors like ´gpg: skipped packet of type 12 in keybox´).

The git-secret internal data is separated into two directories:

This directory currently contains only the file mapping.cfg, which lists all the files your storing encrypted. In other words, the path mappings: what files are tracked to be hidden and revealed.

All the other internal data is stored in the directory:

This directory contains data used by git-secret and PGP to allow and maintain the correct encryption and access rights for the permitted parties.

Generally speaking, all the files in this directory except random_seed should be checked into your repo.
By default, git secret init will add the file .gitsecret/keys/random_seed to your .gitignore file.

Again, you can change the name of this directory using the SECRETS_DIR environment variable.

August 2018 sobolevn

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