nixos-configuration/shared/modules/security/ssh.nix

# /nix/store/<hash>/etc/ssh/ssh_config
{ systemConfig, ... }:

{
  programs.ssh.knownHosts =
    let
      domain = "dns.martials.no";
    in
    {
      desktop = {
        extraHostNames = [ "desktop.${domain}" ];
        publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMSzXyTuQyTrWsfORQbvgrqt/33+hfSUDXeMg6D1T2wz";
      };
      thinkpad = {
        extraHostNames = [ "thinkpad.${domain}" ];
        publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILNlHKE/BD8kKfhJD7GBk1A3whZf3gTjk9VEgGAj3qsH";
      };
      pi4 = {
        extraHostNames = [ "pi4.${domain}" ];
        publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJE9m7YiITe1sDqSZ7Pa8luIw3WToLsypixZEqE4wCQE";
      };
      homelab = {
        extraHostNames = [ "homelab.${domain}" ];
        publicKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIARDv5nRlfPDXdV+Db4FaqeSJZ3/3MO0frYGzuVeqYAl";
      };
    };
  users.users.${systemConfig.username}.openssh.authorizedKeys.keys = [
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMSzXyTuQyTrWsfORQbvgrqt/33+hfSUDXeMg6D1T2wz"
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAILNlHKE/BD8kKfhJD7GBk1A3whZf3gTjk9VEgGAj3qsH"
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJE9m7YiITe1sDqSZ7Pa8luIw3WToLsypixZEqE4wCQE"
    "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIARDv5nRlfPDXdV+Db4FaqeSJZ3/3MO0frYGzuVeqYAl"
  ];
}