added yubikey module working

flake.nix

@@ -58,7 +58,7 @@
          ./modules/defaults/virtualization/docker.nix
          ./modules/defaults/virtualization/kvm.nix
 	 ./modules/defaults/security.nix
-	 #./modules/defaults/yubikey.nix
+	 ./modules/defaults/yubikey.nix
 	 ];
       };
     };

modules/defaults/nix.nix

@@ -3,7 +3,7 @@
 {
   boot.tmp.cleanOnBoot = true;
   
-  nix.package = pkgs.nixVersions.git;
+  nix.package = pkgs.nixVersions.latest;
   
   # nix.extraOptions = "experimental-features = nix-command flakes ca-derivations";
   nix.extraOptions = "experimental-features = nix-command flakes";

modules/defaults/security.nix

@@ -25,8 +25,13 @@
   services.clamav.daemon.enable = true;
   services.clamav.updater.enable = true;
 
+  security.pam.yubico = {
+  enable = true;
+  # logoutOnRemove = true;
+  };
+
   security.pam.services = {
-    login.u2fAuth = true;
+    # login.u2fAuth = true;
     sudo.u2fAuth = true;
   };
   

modules/defaults/yubikey.nix

@@ -0,0 +1,51 @@
+{ config, lib, pkgs, ... }: let
+  cfg = config.security.pam.yubico;
+
+in {
+  options.security.pam.yubico = {
+    logoutOnRemove = lib.mkEnableOption "Logout on Yubikey remove";
+    asClient = lib.mkEnableOption "Use Yubikey as client";
+    clients = lib.mkOption {
+      type = with lib.types; attrsOf (listOf str);
+      example = { myUser = [ "myYubikeyTokenID" ]; };
+      default = {};
+      description = "The users that are allowed to use the Yubikey";
+    };
+
+    product_id = lib.mkOption {
+      type = lib.types.str;
+      default = "1050/407/543";
+      description = "The product id of the Yubikey";
+    };
+  };
+
+  config = lib.mkIf cfg.enable {
+    systemd.tmpfiles.rules = let
+      keysFiles = builtins.mapAttrs (n: v: pkgs.writeText "authorized_yubikeys_${n}" ''
+        ${lib.concatStringsSep ":" ([ n ] ++ v)}
+      '') cfg.clients;
+    in if cfg.asClient then
+      (builtins.concatMap (n: [
+        "d /home/${n}/.yubico 0655 ${n} users -"
+        "L+ /home/${n}/.yubico/authorized_yubikeys 0644 ${n} users - ${keysFiles.${n}}"
+        "Z /home/${n}/.yubico - root root"
+      ]) (builtins.attrNames cfg.clients))
+    else
+      [ "d /var/yubico 0700 root root -" ];
+
+    services.udev.extraRules = lib.mkIf (cfg.logoutOnRemove && !cfg.asClient) ''
+        SUBSYSTEM=="usb", ACTION=="remove", ENV{PRODUCT}=="${cfg.product_id}", RUN+="${pkgs.systemd}/bin/loginctl lock-sessions"
+    '';
+
+    security.pam = {
+      services.hyprlock.yubicoAuth = lib.mkIf config.programs.hyprlock.enable false;
+      yubico = {
+        id = "106508";
+        mode = if cfg.asClient then "client" else "challenge-response";
+        control = "required";
+        challengeResponsePath = lib.mkIf (!cfg.asClient) "/var/yubico";
+      };
+    };
+  };
+}
+