124 lines
3.3 KiB
Nix
124 lines
3.3 KiB
Nix
{
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config,
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lib,
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pkgs,
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...
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}:
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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 = lib.mkEnableOption "polkit";
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security.polkit.package = lib.mkPackageOption pkgs "polkit" { };
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security.polkit.debug = lib.mkEnableOption "debug logs from polkit. This is required in order to see log messages from rule definitions";
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security.polkit.extraConfig = lib.mkOption {
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type = lib.types.lines;
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default = "";
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example = ''
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/* Log authorization checks. */
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polkit.addRule(function(action, subject) {
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// Make sure to set { security.polkit.debug = true; } in configuration.nix
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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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Any polkit rules to be added to config (in JavaScript ;-). See:
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<https://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 = lib.mkOption {
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type = lib.types.listOf lib.types.str;
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default = [ "unix-group:wheel" ];
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example = [
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"unix-user:alice"
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"unix-group:admin"
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];
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description = ''
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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 `auth_admin`
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value). By default, this is all users in the `wheel` group.
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'';
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};
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};
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config = lib.mkIf cfg.enable {
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environment.systemPackages = [
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cfg.package.bin
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cfg.package.out
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];
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systemd.packages = [ cfg.package.out ];
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systemd.services.polkit.serviceConfig.ExecStart = [
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""
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"${cfg.package.out}/lib/polkit-1/polkitd ${lib.optionalString (!cfg.debug) "--no-debug"}"
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];
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systemd.services.polkit.restartTriggers = [ config.system.path ];
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systemd.services.polkit.stopIfChanged = false;
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# The polkit daemon reads action/rule files
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environment.pathsToLink = [ "/share/polkit-1" ];
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# PolKit rules for NixOS.
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environment.etc."polkit-1/rules.d/10-nixos.rules".text = ''
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polkit.addAdminRule(function(action, subject) {
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return [${lib.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 = [ cfg.package.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 = "${cfg.package.bin}/bin/pkexec";
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};
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polkit-agent-helper-1 = {
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setuid = true;
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owner = "root";
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group = "root";
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source = "${cfg.package.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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