Add machines.keys config and reorganize key structure

- Add config.machines.keys for machine-specific keys (private keys live on that machine)
- Move desktop SSH key to machines.keys.desktop.ssh
- Fix extractName to preserve "yubikey" (only strip .key/.pub extensions)
- Rename key files for clarity (android -> graphone, primary -> yubikey)
- Add age yubikey key for encrypted backups
- Add README files to document key purposes
- Update all machine configs to import system config

src/system/config/default.nix

@@ -0,0 +1,14 @@
+{ lib, pkgs, config, ... }:
+
+with lib;
+{
+  options = {
+    machines = mkOption {
+      description = "Machine Configurations";
+      type = types.attrs;
+      default = {
+        keys = import ./keys { inherit lib; };
+      };
+    };
+  };
+}

src/system/config/keys/default.nix

@@ -0,0 +1,33 @@
+{ lib }:
+
+with builtins;
+let
+  extractName = filename:
+    let
+      # Remove .key extension
+      noKey = lib.removeSuffix ".key" filename;
+      # Remove .pub/.priv/.public/.private markers
+      noMarkers = replaceStrings
+        [ ".pub" ".priv" ".public" ".private" ]
+        [ "" "" "" "" ]
+        noKey;
+    in noMarkers;
+
+  constructKeys = dir: (
+    listToAttrs (
+      map (subdir: {
+        name = subdir;
+        value = listToAttrs (
+          map (file: {
+            name = extractName file;
+            value = readFile "${dir}/${subdir}/${file}";
+          }) (filter (file:
+            (readDir "${dir}/${subdir}").${file} == "regular" &&
+            lib.hasSuffix ".key" file
+          ) (attrNames (readDir "${dir}/${subdir}")))
+        );
+      }) (filter (node: (readDir dir).${node} == "directory") (attrNames (readDir dir)))
+    )
+  );
+in
+  constructKeys ./.

src/system/config/keys/desktop/README.md

@@ -0,0 +1,3 @@
+# Desktop Keys
+
+ssh.pub.key - ~/.ssh/id_rsa

src/system/config/keys/desktop/ssh.pub.key

@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIOYXfu4Jc/HtdyhOfAdCXYzhqCubIq3Bz6Kl9NDUov76 bryan@desktop

src/system/machines/desktop/default.nix

@@ -3,6 +3,7 @@
 {
   imports = [
     ../../../user/config
+    ../../config
     ./hardware.nix
     ./system.nix
     ./modules/disko

src/system/machines/desktop/system.nix

@@ -13,7 +13,7 @@ in
       isNormalUser = true;
       extraGroups = config.user.groups
         ++ [ "video" "audio" "kvm" "libvirtd" "dialout" ];
-      openssh.authorizedKeys.keys = [ "${config.user.keys.ssh.android}" ];
+      openssh.authorizedKeys.keys = [ "${config.user.keys.ssh.graphone}" ];
     };
   };
 

src/system/machines/server/default.nix

@@ -3,6 +3,7 @@
 {
   imports = [
     ../../../user/config
+    ../../config
     ./hardware.nix
     ./system.nix
   ];

src/system/machines/server/system.nix

@@ -12,13 +12,12 @@
     backup = {
       enable = true;
       recipients = [
-        # TODO: Add your age recipients
-        # "${config.user.keys.age.yubikey}"
-        # "${config.user.keys.ssh.desktop}"
+       "${config.user.keys.age.yubikey}"
+       "${config.machines.keys.desktop.ssh}"
       ];
       destination = "gdrive:backups/server"; # TODO: configure rclone remote
       schedule = "daily";
-      keepLast = 7;
+      keepLast = 2;
     };
   };
 
@@ -27,7 +26,7 @@
       isNormalUser = true;
       extraGroups = config.user.groups;
       openssh.authorizedKeys.keys = [
-        "${config.user.keys.ssh.desktop}"
+        "${config.machines.keys.desktop.ssh}"
       ];
     };
   };

src/system/machines/vm/default.nix

@@ -3,6 +3,7 @@
 {
   imports = [
     ../../../user/config
+    ../../config
     ./hardware.nix
     ./system.nix
   ];

src/system/machines/vm/system.nix

@@ -8,7 +8,7 @@
     ${config.user.name} = {
       isNormalUser = true;
       extraGroups = config.user.groups;
-      openssh.authorizedKeys.keys = [ "${config.user.keys.ssh.primary}" ];
+      openssh.authorizedKeys.keys = [ "${config.user.keys.ssh.yubikey}" ];
     };
   };
 

src/system/machines/workstation/default.nix

@@ -3,6 +3,7 @@
 {
   imports = [
     ../../../user/config
+    ../../config
     ./hardware.nix
     ./system.nix
   ];

src/system/machines/workstation/system.nix

@@ -10,7 +10,7 @@ with lib;
       extraGroups = config.user.groups
         ++ [ "video" "audio" "kvm" "libvirtd" "dialout" ];
       openssh.authorizedKeys.keys = [ 
-        "${config.user.keys.ssh.primary}" 
+        "${config.user.keys.ssh.yubikey}" 
         "${config.user.keys.ssh.work}" 
       ];
     };

src/system/machines/wsl/default.nix

@@ -3,6 +3,7 @@
 {
   imports = [
     ../../../user/config
+    ../../config
     ./system.nix
   ];
 }

src/system/machines/wsl/system.nix

@@ -9,8 +9,7 @@
       isNormalUser = true;
       extraGroups = config.user.groups;
       openssh.authorizedKeys.keys = [ 
-        "${config.user.keys.ssh.primary}" 
-        "${config.user.keys.ssh.windows}" 
+        "${config.user.keys.ssh.yubikey}" 
       ];
     };
   };