mio-ops/profiles/yubikey.nix

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# NixOps configuration for the hosts using Yubikeys
{ config, pkgs, lib, ... }:
{
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services = {
udev = {
packages = [
pkgs.yubikey-personalization # A library and command line tool to personalize YubiKeys
pkgs.libu2f-host # A C library and command-line tool that implements the host-side of the U2F protocol
];
extraRules = let
dependencies = with pkgs; [ coreutils gnupg gawk gnugrep ];
clearYubikey = pkgs.writeScript "clear-yubikey" ''
#!${pkgs.stdenv.shell}
export PATH=${pkgs.lib.makeBinPath dependencies};
keygrips=$(
gpg-connect-agent 'keyinfo --list' /bye 2>/dev/null \
| grep -v OK \
| awk '{if ($4 == "T") { print $3 ".key" }}')
for f in $keygrips; do
rm -v ~/.gnupg/private-keys-v1.d/$f
done
gpg --card-status 2>/dev/null 1>/dev/null || true
'';
clearYubikeyUser = pkgs.writeScript "clear-yubikey-user" ''
#!${pkgs.stdenv.shell}
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${pkgs.sudo}/bin/sudo -u craige ${clearYubikey}
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'';
in ''
ACTION=="add|change", SUBSYSTEM=="usb", ATTRS{idVendor}=="1050", ATTRS{idProduct}=="0407", RUN+="${clearYubikeyUser}"
'';
};
pcscd.enable = true; # Enable PCSC-Lite daemon
};
# Additional packages used with the Yubikey
environment = {
systemPackages = with pkgs; [
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paperkey # Store OpenPGP or GnuPG on paper
yubikey-manager # CLI tool for configuring any YubiKey over USB
yubikey-manager-qt # Configure any YubiKey over USB interfaces
yubikey-personalization # Lib & CLI tool to personalize YubiKeys
yubikey-personalization-gui # QT based utility to facilitate Yubikey reconfiguration
yubioath-desktop # Yubikey Desktop Authenticator
];
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shellInit = ''
export GPG_TTY="$(tty)"
gpg-connect-agent /bye
export SSH_AUTH_SOCK="/run/user/$UID/gnupg/S.gpg-agent.ssh"
'';
};
programs = {
ssh.startAgent = false; # Disable the SSH Agent
gnupg.agent = {
enable = true; # Enable GPG Agent
enableSSHSupport = true; # Enable SSH agent support in GnuPG agent
};
};
}