config/yubikey.nix


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{ config, lib, pkgs, ... }:
let
  yubikey-pkgs = with pkgs; [
    ccid
    libu2f-host
    libusb
    rng_tools
    yubikey-manager
    yubikey-personalization
    gnupg
    pinentry
  ];
in
{
  services.pcscd.enable = true;
  services.udev.packages = with pkgs; [
    libu2f-host
    yubikey-personalization
  ];
  services.gnome3.gnome-keyring.enable = lib.mkForce false;

  programs.gnupg.agent = {
    enable = true;
    enableSSHSupport = true;
  };
  # Use GPG agent instead.
  programs.ssh.startAgent = lib.mkDefault false;

  environment = {
    systemPackages = yubikey-pkgs;
  };

  security.sudo.extraRules = [
    {
      groups = [ "wheel" ];
      commands = [ { command = "${pkgs.systemd}/bin/systemctl restart pcscd"; options = [ "NOPASSWD" ]; } ];
    }
  ];

  systemd.user.services.restart-pcscd = {
    description = "Redshift colour temperature adjuster";
    wantedBy = [ "graphical-session.target" ];
    partOf = [ "graphical-session.target" ];
    serviceConfig = {
      ExecStart = ''
        sudo systemctl restart pcscd
      '';
      Type = "oneshot";
    };
  };
}