{ config, lib, pkgs, ... }: with lib; let cfgs = config.services; cfg = cfgs.ncdns; dataDir = "/var/lib/ncdns"; username = "ncdns"; valueType = with types; oneOf [ int str bool path ] // { description = "setting type (integer, string, bool or path)"; }; configType = with types; attrsOf (nullOr (either valueType configType)) // { description = '' ncdns.conf configuration type. The format consists of an attribute set of settings. Each setting can be either `null`, a value or an attribute set. The allowed values are integers, strings, booleans or paths. ''; }; configFile = pkgs.runCommand "ncdns.conf" { json = builtins.toJSON cfg.settings; passAsFile = [ "json" ]; } "${pkgs.remarshal}/bin/json2toml < $jsonPath > $out"; defaultFiles = { public = "${dataDir}/bit.key"; private = "${dataDir}/bit.private"; zonePublic = "${dataDir}/bit-zone.key"; zonePrivate = "${dataDir}/bit-zone.private"; }; # if all keys are the default value needsKeygen = all id (flip mapAttrsToList cfg.dnssec.keys (n: v: v == getAttr n defaultFiles)); mkDefaultAttrs = mapAttrs (n: v: mkDefault v); in { ###### interface options = { services.ncdns = { enable = mkEnableOption '' ncdns, a Go daemon to bridge Namecoin to DNS. To resolve .bit domains set `services.namecoind.enable = true;` and an RPC username/password ''; address = mkOption { type = types.str; default = "[::1]"; description = '' The IP address the ncdns resolver will bind to. Leave this unchanged if you do not wish to directly expose the resolver. ''; }; port = mkOption { type = types.port; default = 5333; description = '' The port the ncdns resolver will bind to. ''; }; identity.hostname = mkOption { type = types.str; default = config.networking.hostName; defaultText = literalExpression "config.networking.hostName"; example = "example.com"; description = '' The hostname of this ncdns instance, which defaults to the machine hostname. If specified, ncdns lists the hostname as an NS record at the zone apex: ``` bit. IN NS ns1.example.com. ``` If unset ncdns will generate an internal pseudo-hostname under the zone, which will resolve to the value of {option}`services.ncdns.identity.address`. If you are only using ncdns locally you can ignore this. ''; }; identity.hostmaster = mkOption { type = types.str; default = ""; example = "root@example.com"; description = '' An email address for the SOA record at the bit zone. If you are only using ncdns locally you can ignore this. ''; }; identity.address = mkOption { type = types.str; default = "127.127.127.127"; description = '' The IP address the hostname specified in {option}`services.ncdns.identity.hostname` should resolve to. If you are only using ncdns locally you can ignore this. ''; }; dnssec.enable = mkEnableOption '' DNSSEC support in ncdns. This will generate KSK and ZSK keypairs (unless provided via the options {option}`services.ncdns.dnssec.publicKey`, {option}`services.ncdns.dnssec.privateKey` etc.) and add a trust anchor to recursive resolvers ''; dnssec.keys.public = mkOption { type = types.path; default = defaultFiles.public; description = '' Path to the file containing the KSK public key. The key can be generated using the `dnssec-keygen` command, provided by the package `bind` as follows: ``` $ dnssec-keygen -a RSASHA256 -3 -b 2048 -f KSK bit ``` ''; }; dnssec.keys.private = mkOption { type = types.path; default = defaultFiles.private; description = '' Path to the file containing the KSK private key. ''; }; dnssec.keys.zonePublic = mkOption { type = types.path; default = defaultFiles.zonePublic; description = '' Path to the file containing the ZSK public key. The key can be generated using the `dnssec-keygen` command, provided by the package `bind` as follows: ``` $ dnssec-keygen -a RSASHA256 -3 -b 2048 bit ``` ''; }; dnssec.keys.zonePrivate = mkOption { type = types.path; default = defaultFiles.zonePrivate; description = '' Path to the file containing the ZSK private key. ''; }; settings = mkOption { type = configType; default = { }; example = literalExpression '' { # enable webserver ncdns.httplistenaddr = ":8202"; # synchronize TLS certs certstore.nss = true; # note: all paths are relative to the config file certstore.nsscertdir = "../../var/lib/ncdns"; certstore.nssdbdir = "../../home/alice/.pki/nssdb"; } ''; description = '' ncdns settings. Use this option to configure ncds settings not exposed in a NixOS option or to bypass one. See the example ncdns.conf file at for the available options. ''; }; }; services.pdns-recursor.resolveNamecoin = mkOption { type = types.bool; default = false; description = '' Resolve `.bit` top-level domains using ncdns and namecoin. ''; }; }; ###### implementation config = mkIf cfg.enable { services.pdns-recursor = mkIf cfgs.pdns-recursor.resolveNamecoin { forwardZonesRecurse.bit = "${cfg.address}:${toString cfg.port}"; luaConfig = if cfg.dnssec.enable then ''readTrustAnchorsFromFile("${cfg.dnssec.keys.public}")'' else ''addNTA("bit", "namecoin DNSSEC disabled")''; }; # Avoid pdns-recursor not finding the DNSSEC keys systemd.services.pdns-recursor = mkIf cfgs.pdns-recursor.resolveNamecoin { after = [ "ncdns.service" ]; wants = [ "ncdns.service" ]; }; services.ncdns.settings = mkDefaultAttrs { ncdns = { # Namecoin RPC namecoinrpcaddress = "${cfgs.namecoind.rpc.address}:${toString cfgs.namecoind.rpc.port}"; namecoinrpcusername = cfgs.namecoind.rpc.user; namecoinrpcpassword = cfgs.namecoind.rpc.password; # Identity selfname = cfg.identity.hostname; hostmaster = cfg.identity.hostmaster; selfip = cfg.identity.address; # Other bind = "${cfg.address}:${toString cfg.port}"; } // optionalAttrs cfg.dnssec.enable { # DNSSEC publickey = "../.." + cfg.dnssec.keys.public; privatekey = "../.." + cfg.dnssec.keys.private; zonepublickey = "../.." + cfg.dnssec.keys.zonePublic; zoneprivatekey = "../.." + cfg.dnssec.keys.zonePrivate; }; # Daemon service.daemon = true; xlog.journal = true; }; users.users.ncdns = { isSystemUser = true; group = "ncdns"; description = "ncdns daemon user"; }; users.groups.ncdns = {}; systemd.services.ncdns = { description = "ncdns daemon"; after = [ "namecoind.service" ]; wantedBy = [ "multi-user.target" ]; serviceConfig = { User = "ncdns"; StateDirectory = "ncdns"; Restart = "on-failure"; ExecStart = "${pkgs.ncdns}/bin/ncdns -conf=${configFile}"; }; preStart = optionalString (cfg.dnssec.enable && needsKeygen) '' cd ${dataDir} if [ ! -e bit.key ]; then ${pkgs.bind}/bin/dnssec-keygen -a RSASHA256 -3 -b 2048 bit mv Kbit.*.key bit-zone.key mv Kbit.*.private bit-zone.private ${pkgs.bind}/bin/dnssec-keygen -a RSASHA256 -3 -b 2048 -f KSK bit mv Kbit.*.key bit.key mv Kbit.*.private bit.private fi ''; }; }; meta.maintainers = with lib.maintainers; [ rnhmjoj ]; }