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{ config, lib, pkgs, ... }:
with lib;
let
cfg = config.security.polkit;
in
{
options = {
security.polkit.enable = mkEnableOption "polkit";
security.polkit.extraConfig = mkOption {
type = types.lines;
default = "";
example =
''
/* Log authorization checks. */
polkit.addRule(function(action, subject) {
polkit.log("user " + subject.user + " is attempting action " + action.id + " from PID " + subject.pid);
});
/* Allow any local user to do anything (dangerous!). */
polkit.addRule(function(action, subject) {
if (subject.local) return "yes";
});
'';
description =
''
Any polkit rules to be added to config (in JavaScript ;-). See:
http://www.freedesktop.org/software/polkit/docs/latest/polkit.8.html#polkit-rules
'';
};
security.polkit.adminIdentities = mkOption {
type = types.listOf types.str;
default = [ "unix-group:wheel" ];
example = [ "unix-user:alice" "unix-group:admin" ];
description =
''
Specifies which users are considered “administrators”, for those
actions that require the user to authenticate as an
administrator (i.e. have an <literal>auth_admin</literal>
value). By default, this is all users in the <literal>wheel</literal> group.
'';
};
};
config = mkIf cfg.enable {
environment.systemPackages = [ pkgs.polkit.bin pkgs.polkit.out ];
systemd.packages = [ pkgs.polkit.out ];
systemd.services.polkit.restartTriggers = [ config.system.path ];
systemd.services.polkit.stopIfChanged = false;
# The polkit daemon reads action/rule files
environment.pathsToLink = [ "/share/polkit-1" ];
# PolKit rules for NixOS.
environment.etc."polkit-1/rules.d/10-nixos.rules".text =
''
polkit.addAdminRule(function(action, subject) {
return [${concatStringsSep ", " (map (i: "\"${i}\"") cfg.adminIdentities)}];
});
${cfg.extraConfig}
''; #TODO: validation on compilation (at least against typos)
services.dbus.packages = [ pkgs.polkit.out ];
security.pam.services.polkit-1 = {};
security.wrappers = {
pkexec =
{ setuid = true;
owner = "root";
group = "root";
source = "${pkgs.polkit.bin}/bin/pkexec";
};
polkit-agent-helper-1 =
{ setuid = true;
owner = "root";
group = "root";
source = "${pkgs.polkit.out}/lib/polkit-1/polkit-agent-helper-1";
};
};
systemd.tmpfiles.rules = [
# Probably no more needed, clean up
"R /var/lib/polkit-1"
"R /var/lib/PolicyKit"
];
users.users.polkituser = {
description = "PolKit daemon";
uid = config.ids.uids.polkituser;
group = "polkituser";
};
users.groups.polkituser = {};
};
}
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