SUID wrappers really shouldn't be enabled by default, unless a consumer relies on them. So in my opinion this falls upon the desktop environments if needed or a user to explicltly enable this if wanted. Most desktop environments and services like CUPS already enable polkit by default, that should really be sufficient.
113 lines
2.9 KiB
Nix
113 lines
2.9 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.security.polkit;
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in
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{
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options = {
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security.polkit.enable = mkEnableOption "polkit";
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security.polkit.extraConfig = mkOption {
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type = types.lines;
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default = "";
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example =
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''
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/* Log authorization checks. */
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polkit.addRule(function(action, subject) {
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polkit.log("user " + subject.user + " is attempting action " + action.id + " from PID " + subject.pid);
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});
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/* Allow any local user to do anything (dangerous!). */
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polkit.addRule(function(action, subject) {
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if (subject.local) return "yes";
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});
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'';
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description =
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''
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Any polkit rules to be added to config (in JavaScript ;-). See:
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http://www.freedesktop.org/software/polkit/docs/latest/polkit.8.html#polkit-rules
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'';
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};
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security.polkit.adminIdentities = mkOption {
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type = types.listOf types.str;
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default = [ "unix-group:wheel" ];
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example = [ "unix-user:alice" "unix-group:admin" ];
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description =
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''
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Specifies which users are considered “administrators”, for those
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actions that require the user to authenticate as an
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administrator (i.e. have an <literal>auth_admin</literal>
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value). By default, this is all users in the <literal>wheel</literal> group.
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'';
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};
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};
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config = mkIf cfg.enable {
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environment.systemPackages = [ pkgs.polkit.bin pkgs.polkit.out ];
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systemd.packages = [ pkgs.polkit.out ];
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systemd.services.polkit.restartTriggers = [ config.system.path ];
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systemd.services.polkit.stopIfChanged = false;
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# The polkit daemon reads action/rule files
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environment.pathsToLink = [ "/share/polkit-1" ];
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# PolKit rules for NixOS.
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environment.etc."polkit-1/rules.d/10-nixos.rules".text =
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''
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polkit.addAdminRule(function(action, subject) {
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return [${concatStringsSep ", " (map (i: "\"${i}\"") cfg.adminIdentities)}];
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});
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${cfg.extraConfig}
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''; #TODO: validation on compilation (at least against typos)
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services.dbus.packages = [ pkgs.polkit.out ];
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security.pam.services.polkit-1 = {};
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security.wrappers = {
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pkexec =
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{ setuid = true;
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owner = "root";
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group = "root";
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source = "${pkgs.polkit.bin}/bin/pkexec";
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};
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polkit-agent-helper-1 =
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{ setuid = true;
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owner = "root";
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group = "root";
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source = "${pkgs.polkit.out}/lib/polkit-1/polkit-agent-helper-1";
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};
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};
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systemd.tmpfiles.rules = [
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# Probably no more needed, clean up
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"R /var/lib/polkit-1"
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"R /var/lib/PolicyKit"
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];
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users.users.polkituser = {
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description = "PolKit daemon";
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uid = config.ids.uids.polkituser;
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group = "polkituser";
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};
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users.groups.polkituser = {};
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};
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}
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