✨ [shared] Sops nix for user passwords

.gitattributes

@@ -1 +1 @@
-shared/secrets/* filter=git-crypt diff=git-crypt
+shared/secrets/weather-api-key filter=git-crypt diff=git-crypt

.sops.yaml

@@ -0,0 +1,7 @@
+keys:
+  - &primary age1fxr5s6d6ar0xy5pr63kpq93tk7jha5k96jcxnyquj6s2mw8mmcpss8w29w
+creation_rules:
+  - path_regex: shared/secrets/secrets.yaml$
+    key_groups:
+      - age:
+          - *primary

flake.lock

@@ -509,10 +509,31 @@
         "nixpkgs-stable": "nixpkgs-stable",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "nixvim": "nixvim",
+        "sops-nix": "sops-nix",
         "spicetify-nix": "spicetify-nix",
         "zen-browser": "zen-browser"
       }
     },
+    "sops-nix": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1744669848,
+        "narHash": "sha256-pXyanHLUzLNd3MX9vsWG+6Z2hTU8niyphWstYEP3/GU=",
+        "owner": "mic92",
+        "repo": "sops-nix",
+        "rev": "61154300d945f0b147b30d24ddcafa159148026a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "mic92",
+        "repo": "sops-nix",
+        "type": "github"
+      }
+    },
     "spicetify-nix": {
       "inputs": {
         "nixpkgs": [

flake.nix

@@ -23,10 +23,10 @@
     # ========= Utilities =========
     #
     # Secrets management
-    # sops-nix = {
-    # url = "github:mic92/sops-nix";
-    # inputs.nixpkgs.follows = "nixpkgs";
-    # };
+    sops-nix = {
+      url = "github:mic92/sops-nix";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
     # Catppuccin theming
     catppuccin = {
       url = "github:catppuccin/nix";

justfile

@@ -44,3 +44,19 @@ unlock:
 # Connect to tailnet or sign-in if not registered
 start-tailscale:
     tailscale up --login-server https://vpn.martials.no
+
+# Generate a new age key from an existing ssh key (without passphrase)
+@generate-age-from-ssh:
+    nix run nixpkgs#ssh-to-age -- -private-key -i ~/.ssh/id_ed25519 > ~/.config/sops/age/keys.txt
+
+# Get a public age key from an existing age private key
+@get-public-age-key:
+    nix shell nixpkgs#age -c age-keygen -y ~/.config/sops/age/keys.txt
+
+# Edit the SOPS secrets file
+@edit-secrets:
+    nix run nixpkgs#sops -- shared/secrets/secrets.yaml
+
+# Hash a string using the mkpasswd command
+hash PASS:
+    echo "{{PASS}}" | mkpasswd -s

shared/modules/security/default.nix

@@ -1,5 +1,6 @@
 {
   imports = [
+    ./sops.nix
     ./yubikey.nix
   ];
 

shared/modules/security/sops.nix

@@ -0,0 +1,20 @@
+{
+  inputs,
+  lib,
+  systemConfig,
+  ...
+}:
+
+{
+  imports = [
+    inputs.sops-nix.nixosModules.sops
+  ];
+
+  sops = {
+    defaultSopsFile = lib.custom.relativeToRoot "shared/secrets/secrets.yaml";
+    defaultSopsFormat = "yaml";
+
+    age.keyFile = "/home/${systemConfig.user.name}/.config/sops/age/keys.txt";
+    secrets.password.neededForUsers = true;
+  };
+}

shared/modules/users.nix

@@ -1,11 +1,11 @@
-{ systemConfig, ... }:
+{ config, systemConfig, ... }:
 let
   username = systemConfig.user.name;
 in
 {
-  # Define a user without a password, TODO pass in user.password
   users.users.${username} = {
     isNormalUser = true;
+    hashedPasswordFile = config.sops.secrets.password.path;
     description = username;
     extraGroups = [
       "networkmanager"

shared/secrets/secrets.yaml

@@ -0,0 +1,21 @@
+password: ENC[AES256_GCM,data:tEiGH0G57H9yfRr3t9MyPEw3UvKPXJcCQ3xd0Baiz2yzIlFdPAMWl3TUjmGgEolaU2HznIv3DXAtlqQt8mXCMJKE8XD20VTOjw==,iv:OZYO/Ps9JakbvLqJ6QaUQ6YcJRasM0GRSQzs/mhg3eg=,tag:UjzK0vJPHj8UEgDMAlBjZw==,type:str]
+sops:
+  kms: []
+  gcp_kms: []
+  azure_kv: []
+  hc_vault: []
+  age:
+    - recipient: age1fxr5s6d6ar0xy5pr63kpq93tk7jha5k96jcxnyquj6s2mw8mmcpss8w29w
+      enc: |
+        -----BEGIN AGE ENCRYPTED FILE-----
+        YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBReCtVUlRYV0hXL1RDa2ta
+        dDVlRU1FazI1cjA1OGJxNUZ6TGVkWFI2SGxVCm9VdUliTk1CeWRGN3pvOU5ZcGNZ
+        dGxNMlFRUlcyR1NKNVVscDFPbHRUWjAKLS0tIDhhQjhPWnZXdVZkd1owT0pWQ2dH
+        aENIaVM4cm1ZWDVOcEFYZEFjTDc1OUkKpRq6R6PYR9lPdX79Kaw+7R3OYLZLVrYh
+        seVS5wbrjShY2MZGKAOc0mUt5pCDBddt43gGAmI152451l70LZiN7A==
+        -----END AGE ENCRYPTED FILE-----
+  lastmodified: "2025-04-16T22:29:18Z"
+  mac: ENC[AES256_GCM,data:e+OAwJgpRLaCh64dQPOtI7ZmH9NflmyO37HmQFCWEjn65VB0tGfodmmKzzf8D+e7dZLQCO2RA86atSN3GdiB5JSJ7LGJg0XYMDBPi4Kc9iOSgxvnzeZd0YL52aD9qRHx4H5GDPSTHd0ZdqGj1c6DUVaHLxwd3uFh3FzS7nkAlfQ=,iv:r2tIu9xSrT0xv5vJV4OlDj0ogs9LZggucjY1KrI48Fk=,tag:oUavEzaMczLx47ZB6XE8+w==,type:str]
+  pgp: []
+  unencrypted_suffix: _unencrypted
+  version: 3.9.4