95 lines
2.7 KiB
Nix
95 lines
2.7 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.tang;
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in
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{
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options.services.tang = {
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enable = mkEnableOption "tang";
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package = mkOption {
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type = types.package;
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default = pkgs.tang;
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defaultText = literalExpression "pkgs.tang";
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description = "The tang package to use.";
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};
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listenStream = mkOption {
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type = with types; listOf str;
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default = [ "7654" ];
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example = [ "198.168.100.1:7654" "[2001:db8::1]:7654" "7654" ];
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description = ''
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Addresses and/or ports on which tang should listen.
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For detailed syntax see ListenStream in {manpage}`systemd.socket(5)`.
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'';
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};
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ipAddressAllow = mkOption {
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example = [ "192.168.1.0/24" ];
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type = types.listOf types.str;
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description = ''
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Whitelist a list of address prefixes.
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Preferably, internal addresses should be used.
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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 = [ cfg.package ];
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systemd.services."tangd@" = {
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description = "Tang server";
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path = [ cfg.package ];
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serviceConfig = {
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StandardInput = "socket";
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StandardOutput = "socket";
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StandardError = "journal";
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DynamicUser = true;
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StateDirectory = "tang";
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RuntimeDirectory = "tang";
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StateDirectoryMode = "700";
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UMask = "0077";
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CapabilityBoundingSet = [ "" ];
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ExecStart = "${cfg.package}/libexec/tangd %S/tang";
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LockPersonality = true;
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MemoryDenyWriteExecute = true;
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NoNewPrivileges = true;
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DeviceAllow = [ "/dev/stdin" ];
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RestrictAddressFamilies = [ "AF_UNIX" ];
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DevicePolicy = "strict";
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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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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" "~@privileged" "~@resources" ];
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IPAddressDeny = "any";
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IPAddressAllow = cfg.ipAddressAllow;
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};
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};
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systemd.sockets.tangd = {
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description = "Tang server";
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wantedBy = [ "sockets.target" ];
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socketConfig = {
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ListenStream = cfg.listenStream;
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Accept = "yes";
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IPAddressDeny = "any";
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IPAddressAllow = cfg.ipAddressAllow;
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};
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};
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};
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meta.maintainers = with lib.maintainers; [ jfroche julienmalka ];
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}
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