add secure boot support

modules/system/default.nix

@@ -16,6 +16,7 @@
     ./syncthing
     ./graphics
     ./flatpak
+    ./secure_boot
   ];
 
   system.ssh.enable = lib.mkDefault true;

modules/system/secure_boot/default.nix

@@ -0,0 +1,31 @@
+{
+  pkgs,
+  inputs,
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.system.secure_boot;
+in {
+  options.system.secure_boot = {
+    enable = lib.mkEnableOption "enables secureboot with lanzaboote";
+  };
+
+  imports = [inputs.lanzaboote.nixosModules.lanzaboote];
+
+  config = lib.mkIf cfg.enable {
+
+    # install userspace secureboot tools
+    environment.systemPackages = with pkgs; [
+      sbctl
+    ];
+
+    # force disable systemd-boot so lanzaboote can be used
+    boot.loader.systemd-boot.enable = lib.mkForce false;
+
+    boot.lanzaboote = {
+      enable = true;
+      pkiBundle = "/var/lib/sbctl";
+    };
+  };
+}