nixos/infnoise: init

4 files changed, 72 insertions, 1 deletions

diff --git a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
index 8bbb8665219ae..b2d9b26fa3714 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
@@ -40,7 +40,7 @@
   </section>
   <section xml:id="sec-release-22.11-new-services">
     <title>New Services</title>
-    <itemizedlist spacing="compact">
+    <itemizedlist>
       <listitem>
         <para>
           <link xlink:href="https://github.com/jollheef/appvm">appvm</link>,
@@ -48,6 +48,13 @@
           <link xlink:href="options.html#opt-virtualisation.appvm.enable">virtualisation.appvm</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <link xlink:href="https://github.com/leetronics/infnoise">infnoise</link>,
+          a hardware True Random Number Generator dongle. Available as
+          <link xlink:href="options.html#opt-services.infnoise.enable">services.infnoise</link>.
+        </para>
+      </listitem>
     </itemizedlist>
   </section>
   <section xml:id="sec-release-22.11-incompatibilities">
diff --git a/nixos/doc/manual/release-notes/rl-2211.section.md b/nixos/doc/manual/release-notes/rl-2211.section.md
index 5dc8e958c8966..8dcde84f237a2 100644
--- a/nixos/doc/manual/release-notes/rl-2211.section.md
+++ b/nixos/doc/manual/release-notes/rl-2211.section.md
@@ -25,6 +25,9 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - [appvm](https://github.com/jollheef/appvm), Nix based app VMs. Available as [virtualisation.appvm](options.html#opt-virtualisation.appvm.enable).
 
+- [infnoise](https://github.com/leetronics/infnoise), a hardware True Random Number Generator dongle.
+  Available as [services.infnoise](options.html#opt-services.infnoise.enable).
+
 <!-- To avoid merge conflicts, consider adding your item at an arbitrary place in the list instead. -->
 
 ## Backward Incompatibilities {#sec-release-22.11-incompatibilities}
diff --git a/nixos/modules/module-list.nix b/nixos/modules/module-list.nix
index f7357036d69d1..0767343368d6f 100644
--- a/nixos/modules/module-list.nix
+++ b/nixos/modules/module-list.nix
@@ -981,6 +981,7 @@
   ./services/security/hologram-server.nix
   ./services/security/hologram-agent.nix
   ./services/security/kanidm.nix
+  ./services/security/infnoise.nix
   ./services/security/munge.nix
   ./services/security/nginx-sso.nix
   ./services/security/oauth2_proxy.nix
diff --git a/nixos/modules/services/security/infnoise.nix b/nixos/modules/services/security/infnoise.nix
new file mode 100644
index 0000000000000..4fb8adaf33f89
--- /dev/null
+++ b/nixos/modules/services/security/infnoise.nix
@@ -0,0 +1,60 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.services.infnoise;
+in {
+  options = {
+    services.infnoise = {
+      enable = mkEnableOption "the Infinite Noise TRNG driver";
+
+      fillDevRandom = mkOption {
+        description = ''
+          Whether to run the infnoise driver as a daemon to refill /dev/random.
+
+          If disabled, you can use the `infnoise` command-line tool to
+          manually obtain randomness.
+        '';
+        type = types.bool;
+        default = true;
+      };
+    };
+  };
+
+  config = mkIf cfg.enable {
+    environment.systemPackages = [ pkgs.infnoise ];
+
+    services.udev.extraRules = ''
+      SUBSYSTEM=="usb", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6015", SYMLINK+="infnoise", TAG+="systemd", GROUP="dialout", MODE="0664", ENV{SYSTEMD_WANTS}="infnoise.service"
+    '';
+
+    systemd.services.infnoise = mkIf cfg.fillDevRandom {
+      description = "Infinite Noise TRNG driver";
+
+      bindsTo = [ "dev-infnoise.device" ];
+      after = [ "dev-infnoise.device" ];
+
+      serviceConfig = {
+        ExecStart = "${pkgs.infnoise}/bin/infnoise --dev-random --debug";
+        Restart = "always";
+        User = "infnoise";
+        DynamicUser = true;
+        SupplementaryGroups = [ "dialout" ];
+        DeviceAllow = [ "/dev/infnoise" ];
+        DevicePolicy = "closed";
+        PrivateNetwork = true;
+        ProtectSystem = "strict";
+        ProtectHome = true;
+        ProtectHostname = true;
+        ProtectKernelLogs = true;
+        ProtectKernelModules = true;
+        ProtectKernelTunables = true; # only reads entropy pool size and watermark
+        RestrictNamespaces = true;
+        RestrictRealtime = true;
+        LockPersonality = true;
+        MemoryDenyWriteExecute = true;
+      };
+    };
+  };
+}