SSH updates

readme.md

@@ -17,6 +17,13 @@ export USERNAME=desired_username_for_admin_on_this_machine (josh)
     - uncomment systemPackages and add: `git` `curl`
     - add `nix.settings.experimental-features = [ "nix-command" "flakes" ];`
     - add `users.users.USERNAME = { ... todo, just enough to get to git clone the real nixos config into its home .config folder }
+```
+users.users.josh = {
+    initialPassword = "password1";
+    isNormalUser = true;
+    extraGroups = [ "wheel" "networkmanager" "video" "input" ];
+};
+```
     - TODO add whatever is needed for default pubkeys for onboarding later
 - Install nixos: `cd /mnt` `sudo nixos-install`
     - `passwd` to change root password (if not already prompted to do so)

secrets/secrets.nix

@@ -18,6 +18,7 @@ let
   ];
 in
 {
+  # TODO come up with a rotate method/encrypt the device keys bette. This isn't very secure feeling to me the way I am doing this now. If anyone gains access to any one of my devices, then my secrets are no longer secret. This is not a good model.
   "nix2github.age" = { inherit publicKeys; };
   "nix2bitbucket.age" = { inherit publicKeys; };
 }

users/_common/home_manager/_home_manager.nix

@@ -4,9 +4,4 @@
 
   home.username = settings.user.username;
   home.homeDirectory = "/home/${settings.user.username}";
-
-  imports = ylib.umport {
-    paths = [ ./programs ];
-    recursive = true;
-  };
 }

users/_common/home_manager/ssh.nix

@@ -0,0 +1,15 @@
+{ age, ... }:
+{
+  programs.ssh = {
+    enable = true;
+    matchBlocks = {
+      "github.com" = {
+        identityFile = age.secrets.nix2github.path;
+      };
+      "bitbucket.org" = {
+        identityFile = age.secrets.nix2bitbucket.path;
+      };
+    };
+  };
+}
+

users/_common/nix_modules/ssh-key.nix

@@ -0,0 +1,30 @@
+{ settings, pkgs, ... }:
+let
+  sshScript = pkgs.writeScript "ssh-key-generation" ''
+    #!${pkgs.stdenv.shell}
+    if [ ! -f /home/${settings.user.username}/.ssh/id_ed25519]; then
+      if [ -v DRY_RUN ]; then
+        echo "DRY_RUN is set. Would generate SSH key for ${settings.user.username}."
+      else
+        echo "Generating SSH key for ${settings.user.username}."
+        mkdir -p /home/${settings.user.username}/.ssh
+        chmod 700 /home/${settings.user.username}/.ssh
+        /run/current-system/sw/bin/ssh-keygen -t ed25519 -f /home/${settings.user.username}/.ssh/id_ed25519-N ""
+      fi
+    else
+      echo "SSH key already exists for ${settings.user.username}."
+    fi
+  '';
+in
+{
+  # Ensure SSH key pair generation for non-root users
+  systemd.services.generate_ssh_key = {
+    description = "Generate SSH key pair for ${settings.user.username}";
+    wantedBy = [ "multi-user.target" ];
+    serviceConfig = {
+      User = "${settings.user.username}";
+      Type = "oneshot";
+      ExecStart = sshScript;
+    };
+  };
+}

users/_common/programs/ssh.nix

@@ -1,31 +0,0 @@
-{ lib, settings, age, pkgs, ... } @ args:
-{
-  # We always want a standard ssh key-pair used for secret management, create it if not there.
-  home.activation.generateSshKey = lib.hm.dag.entryAfter [ "writeBoundary" ] ''
-    if [ ! -f $HOME/.ssh/id_ed25519 ]; then
-      if [ -v DRY_RUN ]; then
-        echo "DRY_RUN is set. Would generate SSH key for ${settings.user.username}."
-      else
-        echo "Generating SSH key for ${settings.user.username}."
-        mkdir -p $HOME/.ssh
-        chmod 700 $HOME/.ssh
-        ${pkgs.openssh}/bin/ssh-keygen -t ed25519 -f $HOME/.ssh/id_ed25519 -N ""
-      fi
-    else
-      echo "SSH key already exists for ${settings.user.username}."
-    fi
-  '';
-
-  programs.ssh = {
-    enable = true;
-    matchBlocks = {
-      "github.com" = {
-        identityFile = age.secrets.nix2github.path;
-      };
-      "bitbucket.org" = {
-        identityFile = age.secrets.nix2bitbucket.path;
-      };
-    };
-  };
-}
-

users/josh/configuration.nix

@@ -1,33 +1,37 @@
-{ config, lib, ylib, pkgs, settings, ... } @ args:
+{ lib, ylib, settings, ... }:
 {
-  users.users.${settings.user.username} = {
+  imports =
-    initialPassword = "password1";
+    [ ]
-    isNormalUser = true;
+    ## Common nix modules
-    extraGroups = [ "wheel" "networkmanager" "video" "input" ];
+    ++ ylib.umport {
-    shell = pkgs.zsh;
+      path = lib.fileset.maybeMissing (settings.usersDir + "/_common/nix_modules");
-  };
+      recursive = true;
-
+    }
-  # TODO how to do this from home manager file instead
+    # Nix modules for this user
-  environment.pathsToLink = [ "/share/zsh" ];
+    ++ ylib.umport {
-  programs.zsh = {
+      path = lib.fileset.maybeMissing ./nix_modules;
-    enable = true;
+      recursive = true;
-  };
+    }
-
+    # Nix modules by host for this user
-  imports = ylib.umport {
+    ++ ylib.umport {
-    path = lib.fileset.maybeMissing ./by_hosts/${settings.system.hostname}/nix_modules;
+      path = lib.fileset.maybeMissing ./by_hosts/${settings.system.hostname}/nix_modules;
-    recursive = true;
+      recursive = true;
-  };
+    };
 
   home-manager.users.${settings.user.username} = {
     imports =
-      # Common settings all users share
+      [ ]
-      [ (settings.usersDir + "/_common/home.nix") ]
+      # Common home manager
-      # Programs
       ++ ylib.umport {
-        path = ./home_manager;
+        path = lib.fileset.maybeMissing (settings.usersDir + "/_common/home_manager");
         recursive = true;
       }
-      # Programs by host
+      # Home manger for this user
+      ++ ylib.umport {
+        path = lib.fileset.maybeMissing ./home_manager;
+        recursive = true;
+      }
+      # Home manager by host for this user
       ++ ylib.umport {
         path = lib.fileset.maybeMissing ./by_hosts/${settings.system.hostname}/home_manager;
         recursive = true;

users/josh/nix_modules/_user.nix

@@ -0,0 +1,16 @@
+{ pkgs, settings, ... }:
+{
+  users.users.${settings.user.username} = {
+    initialPassword = "password1";
+    isNormalUser = true;
+    extraGroups = [ "wheel" "networkmanager" "video" "input" ];
+    shell = pkgs.zsh;
+  };
+
+  # TODO how to do this from home manager file instead
+  environment.pathsToLink = [ "/share/zsh" ];
+  programs.zsh = {
+    enable = true;
+  };
+}
+