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# keyfork #
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An opinionated and modular toolchain for generating and managing a wide range
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of cryptographic keys offline and on smartcards from a shared bip39 mnemonic
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phrase.
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Note: The following document is all proposed, and not yet implemented.
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## Features
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* Modular
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* Standalone binaries can derive/manage keys/config from bip32 root
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* Modules handle use cases like ssh, pgp, webauthn, crypto-assets, etc
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* Module contract is dead simple and can be written in any language
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* Recoverable
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* Config file and 24 word mnemonic phrase to recover -all- keys
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* Unpredictable
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* Generate a BIP39 phrase from OS entropy
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* Take BIP39 passphrase from user supplied entropy
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* Read up on [https://milksad.info](milksad) to understand why this matters!
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* Offline
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* Will exit if network access is detected to force you to keep keys offline
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* Helps limit the risk of supply chain attacks
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* Intended for use with QubesOS Vault VM, AirgapOS, etc
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* Private keys are installed to HSMs/TEEs for use by online machines
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## Install
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These steps will allow you to prove that at least two Distrust engineers
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signed off on the produced binaries, signaling that they reproduced them from
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source code and got identical results, in addition to our usual two-party code
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review processes.
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This minimizes a single point of trust (and failure) in our binary release
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process.
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See the [Reproducible Builds](https://reproducible-builds.org/) project for
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more information on these practices.
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We use git for all development, releases, and signing. Unfortunately git has no
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native method for large file storage or multi-signature workflows so some git
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add-ons are required.
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To follow these steps please install [git-lfs][gl] and [git-sig][gs].
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[gs]: https://git.distrust.co/public/git-sig
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[gl]: https://git-lfs.com
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1. Clone repo
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```sh
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git clone https://git.distrust.co/public/keyfork
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cd keyfork
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```
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2. Review binary signatures
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```sh
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git sig verify
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```
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Note: See Trust section below for expected keys/signers
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3. Install binary
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```
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make install
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```
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## Usage
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```
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keyfork generate [-c,--config=<file>]
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Generate new mnemonic optionally public keys defined by config
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keyfork recover [-c,--config=<file>] [-a,--agent]
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Recover keychain and optionally config defined pubkeys from mnemonic
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Optionally run a daemon to supply keys to subcommands
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keyfork version
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Show version information.
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keyfork help
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Show this text.
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keyfork [command]
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Commands receive bip32 root as stdin
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Commands return output and config data as json over stdout back to keyfork
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keyfork [command] help
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Show help for a particular sub-command
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```
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## Examples
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#### Generate a new mnemonic to write to paper
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```
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$ keyfork generate
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> milk sad wage cup reward umbrella raven visa give list decorate bulb gold raise twenty fly manual stand float super gentle climb fold park
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```
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#### Recover a mnemonic with a passphrase and spawn agent
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```
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$ keyfork recover --agent
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> mnemonic: ********
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> passphrase: ********
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```
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#### Derive deterministic PGP keychain from agent key in default "sq" path
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Requires ```keyfork-pgp``` binary in $PATH
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```
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$ keyfork pgp --format=sq
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$ sq decrypt secret.pgp
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```
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#### Install deterministic PGP subkeys from agent key to a smartcard
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Requires ```keyfork-pgp``` binary in $PATH
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```
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$ keyfork pgp install --device=nitrokey
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$ gpg --card-status
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```
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#### Install first deterministic PIV key from agent key to smartcard on slot 1
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Requires ```keyfork-piv``` binary in $PATH
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```
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$ keyfork piv install --device=yubikey --key=1 --slot=1
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> Management Key: ****
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> User Pin: ****
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> Admin Pin: ****
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$ ssh-keygen -D "$OPENSC_LIBS/opensc-pkcs11.so" -e
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```
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#### Derive first deterministic BIP44 address for Bitcoin Account 1
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Requires ```keyfork-bip44``` binary in $PATH
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```
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$ keyfork bip44 --path=bitcoin
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> m/44'/0'/0'/0/0: 12DefCMhYVv4sBQikyXKMciAoX2wgzhWqb
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```
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