134 lines
4.1 KiB
Nix
134 lines
4.1 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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inherit (lib) getExe mkIf mkOption mkEnableOption optionals types;
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cfg = config.services.mollysocket;
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configuration = format.generate "mollysocket.conf" cfg.settings;
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format = pkgs.formats.toml { };
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package = pkgs.writeShellScriptBin "mollysocket" ''
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MOLLY_CONF=${configuration} exec ${getExe pkgs.mollysocket} "$@"
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'';
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in {
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options.services.mollysocket = {
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enable = mkEnableOption ''
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[MollySocket](https://github.com/mollyim/mollysocket) for getting Signal
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notifications via UnifiedPush
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'';
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settings = mkOption {
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default = { };
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description = ''
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Configuration for MollySocket. Available options are listed
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[here](https://github.com/mollyim/mollysocket#configuration).
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'';
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type = types.submodule {
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freeformType = format.type;
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options = {
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host = mkOption {
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default = "127.0.0.1";
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description = "Listening address of the web server";
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type = types.str;
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};
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port = mkOption {
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default = 8020;
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description = "Listening port of the web server";
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type = types.port;
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};
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allowed_endpoints = mkOption {
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default = [ "*" ];
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description = "List of UnifiedPush servers";
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example = [ "https://ntfy.sh" ];
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type = with types; listOf str;
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};
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allowed_uuids = mkOption {
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default = [ "*" ];
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description = "UUIDs of Signal accounts that may use this server";
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example = [ "abcdef-12345-tuxyz-67890" ];
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type = with types; listOf str;
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};
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};
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};
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};
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environmentFile = mkOption {
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default = null;
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description = ''
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Environment file (see {manpage}`systemd.exec(5)` "EnvironmentFile="
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section for the syntax) passed to the service. This option can be
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used to safely include secrets in the configuration.
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'';
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example = "/run/secrets/mollysocket";
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type = with types; nullOr path;
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};
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logLevel = mkOption {
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default = "info";
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description = "Set the {env}`RUST_LOG` environment variable";
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example = "debug";
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type = types.str;
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};
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};
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config = mkIf cfg.enable {
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environment.systemPackages = [
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package
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];
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# see https://github.com/mollyim/mollysocket/blob/main/mollysocket.service
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systemd.services.mollysocket = {
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description = "MollySocket";
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wantedBy = [ "multi-user.target" ];
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after = [ "network-online.target" ];
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wants = [ "network-online.target" ];
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environment.RUST_LOG = cfg.logLevel;
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serviceConfig = let
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capabilities = [ "" ] ++ optionals (cfg.settings.port < 1024) [ "CAP_NET_BIND_SERVICE" ];
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in {
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EnvironmentFile = cfg.environmentFile;
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ExecStart = "${getExe package} server";
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KillSignal = "SIGINT";
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Restart = "on-failure";
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StateDirectory = "mollysocket";
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TimeoutStopSec = 5;
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WorkingDirectory = "/var/lib/mollysocket";
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# hardening
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AmbientCapabilities = capabilities;
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CapabilityBoundingSet = capabilities;
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DevicePolicy = "closed";
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DynamicUser = true;
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LockPersonality = true;
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MemoryDenyWriteExecute = true;
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NoNewPrivileges = true;
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PrivateDevices = true;
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PrivateTmp = true;
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PrivateUsers = true;
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ProcSubset = "pid";
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ProtectClock = true;
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ProtectControlGroups = true;
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ProtectHome = true;
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ProtectHostname = true;
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ProtectKernelLogs = true;
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ProtectKernelModules = true;
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ProtectKernelTunables = true;
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ProtectProc = "invisible";
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ProtectSystem = "strict";
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RemoveIPC = true;
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RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
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RestrictNamespaces = true;
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RestrictRealtime = true;
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RestrictSUIDSGID = true;
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SystemCallArchitectures = "native";
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SystemCallFilter = [ "@system-service" "~@resources" "~@privileged" ];
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UMask = "0077";
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};
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};
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};
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meta.maintainers = with lib.maintainers; [ dotlambda ];
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}
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