modules: Use namespaces

That might make it easier in the future to merge different server
configs together (and thusly facilitate code-reuse.).

1 files changed, 60 insertions, 0 deletions

diff --git a/modules/vhack/op/openssh/module.nix b/modules/vhack/op/openssh/module.nix
new file mode 100644
index 0000000..83aeadf
--- /dev/null
+++ b/modules/vhack/op/openssh/module.nix
@@ -0,0 +1,60 @@
+{
+  config,
+  lib,
+  ...
+}: let
+  cfg = config.vhack.openssh;
+in {
+  options.vhack.openssh = {
+    enable = lib.mkEnableOption ''
+      a sane openssh implementation.
+    '';
+  };
+
+  config = lib.mkIf cfg.enable {
+    /*
+     FIXME(@bpeetz):
+      This results in a boot error, as the `/var/lib/sshd` directory
+      is only mounted _after_ the stage 2 init and with it the system
+      activation. `agenix` needs the sshd hostkey however to decrypt the
+      secrets and thus we have to ensure that this directory is mounted
+      _before_ the system activation. Alas the only way I see to achieve
+      that is to store the ssh hostkey directly on /srv, which is mounted
+      before (it's marked as 'neededForBoot' after all).
+
+      It should be possible to achieve this with impermanence however,
+      as `/var/log` is mounted in the stage 1 init; The problem is that
+      I have no idea _why_ only this is mounted and nothing else.
+
+
+    vhack.persist.directories = [
+      {
+        directory = "/var/lib/sshd";
+        user = "root";
+        group = "root";
+        mode = "0755";
+      }
+    ];
+    */
+
+    users = {
+      users.sshd.uid = config.vhack.constants.ids.uids.sshd;
+      groups.sshd.gid = config.vhack.constants.ids.gids.sshd;
+    };
+
+    services.openssh = {
+      enable = true;
+      settings.PasswordAuthentication = false;
+      hostKeys = [
+        {
+          # FIXME: Remove the dependency on `/srv` this workaround.
+          # See the explanation for using `/srv` above.
+          path = "/srv/var/lib/sshd/ssh_host_ed25519_key";
+
+          rounds = 1000;
+          type = "ed25519";
+        }
+      ];
+    };
+  };
+}