Keyringer
=========

Keyringer lets you manage and share secrets using GPG and git in a distributed
fashion. It has custom commands to encrypt, decrypt, recrypt, create key pairs,
etc.

Requirements
------------

Keyringer needs:

  - Bash - http://tiswww.case.edu/php/chet/bash/bashtop.html
  - Git - http://git-scm.com
  - GNU Privacy Guard - http://gnupg.org
  - OpenSSL - http://www.openssl.org
  - Grep, awk, tail, cut, sed and other GNU tools

Installation
------------

Just clone

	git clone git://git.sarava.org/keyringer.git

And then leave it somewhere, optionally adding it to your $PATH environment variable.
You can also package it to your preferred distro.

Creating a keyringer repository
-------------------------------

The first step will would like to take is to setup a keyring.  Keyringer suport
management of multiple isolated keyrings.  To start a new keyring (or register
an existing one at your config file), type

  keyringer <keyring> init <path> [remote]

This will 

  1. Add an entry at $HOME/.keyringer aliasing 'keyring' to 'path'.
  2. Initialize a git repository if needed.

For example,

  keyringer friends init $HOME/keyrings/friends

will create an alias "friends" pointing to $HOME/keyrings/friends. Call all
other keyring actions using this alias.

If there is an existing remote keyring repository and you just want to checkout
it, use

  keyringer friends create $HOME/keyrings/friends <repository-url>

Managing recipients
-------------------

Your next step is tell keyringer the GPG key ids to encrypt files to:

  keyringer <keyring> recipients edit
  keyringer <keyring> recipients ls

Encrypting a key
----------------

  keyringer <keyring> encrypt <file>

Decrypting a key (only to stdout)
---------------------------------

  keyringer <keyring> decrypt <file>

Re-encrypting a key
-------------------

  keyringer <keyring> recrypt <file>

Listing keys
------------

  keyringer <keyring> ls [arguments]

Git wrapper
-----------

Keyringer comes with a simple git wrapper to ease common management tasks:

  keyringer <keyring> git remote add keyringer <url>
  keyringer <keyring> git push keyringer master
  keyringer <keyring> git pull

Notes
-----

  1. The <file> is any file inside the keys/ folder of your
     keyring directory.

  2. Never decrypt a key and write it to the disk, except
     if you're adding it to your personall keyring.

  3. Recipients are defined at file config/recipients.
     Please add just trustable recipients.

Concepts
--------

Basic idea is:

  - Encrypt stuff with ppl's gpg pubkeys and push the output
    in a git repo.

  - Let ppl keep it in sync with the repo and the keys are
    shared :)

For "key" it's meant anything as the script work with stdin and output things to
files, so it can be passphrases, private keys or other kind of info.

It's possible to share keys using an encrypted mailing list, but the main
difficulty is to track the message where the keys are.

With theses scripts, the workflow is more or less like this:

  - You have a git repo for secret keys.

  - You run the "encrypt" command and paste your private key to this
    command (so no plaintext disk write).

  - The encrypt command writes an encrypted file to the repo.

  - You manually add it to git and push it to remote repositories.

  - Optionally, other ppl pulls the changes but they dont need to
    decrypt anything until they need to use the keys.

So it's just gpg-encrypted data atop of a git repository (one can think of a
kind of distributed encrypted filesystem).

Git was chosen to host encrypted info mostly for two reasos: easy to distribute
and its the only VCS known to make easier repository history manipulation.

One possible drawback: the repo has pubkey information attached, which can be
linked to real ppl (and then disclose the information about who has access to a
given key), but it's possible to:

  - Keep the repo just atop of an encrypted and non-public place.        

  - Or to consider an integration with gpg's --hidden-recipient option.

Notes: Using with GNU Privacy Guard
-----------------------------------

Exporting public keys:

  gpg --armor --export <keyid>

Exporting private keys (take care):

  gpg --armor --export-secret-keys

TODO
----

There are lots of things that can be enhanced, like:

  - Enhanced documentation.

  - Interface with ssss where the scripts automatically splits passphrases
    into ssss tokens and encrypt those to different groups of users.

  - Hidden recipient support (including recipients file).