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|
{ config, pkgs, lib, runCommand, ... }:
let
package = pkgs.callPackage ./default.nix {};
cfg = config.services.smtp-forward;
in {
options.services.smtp-forward = {
enable = lib.mkEnableOption "the smtp-forward service";
mapping = lib.mkOption {
type = lib.types.strMatching "([^:]+:[^:]+@[^,]+)(,[^:]+:[^:]+@[^,]+)*";
default = "prefix1:addres@host,prefix2:address@host";
description = "-m maps prefixes to email addresses";
};
listen = lib.mkOption {
type = lib.types.str;
default = ":25";
description = "-l sets the address to listen on";
};
hostname = lib.mkOption {
type = lib.types.str;
default = "localhost";
description = "-h sets the server hostname";
};
key = lib.mkOption {
type = lib.types.path;
default = null;
description = "-k /path/to/file sets the TLS key file";
};
cert = lib.mkOption {
type = lib.types.path;
default = null;
description = "-c /path/to/file" sets the TLS certificate file";
};
};
config = lib.mkIf config.services.smtp-forward.enable {
systemd.services.smtp-forward = {
description = "Run smtp-forward";
path = [ package ];
wantedBy = [ "default.target" ];
script = ''
${package}/bin/smtp-forward -l ${cfg.listen} -m ${cfg.mapping} -h ${cfg.hostname} \
${lib.optionalString (cfg.key != null) "-k ${cfg.key}"} \
${lib.optionalString (cfg.cert != null) "-c ${cfg.cert}"}
'';
serviceConfig = {
User = "smtp-forward";
# Security
AmbientCapabilities = [ "CAP_NET_BIND_SERVICE" ];
CapabilityBoundingSet = [ "CAP_NET_BIND_SERVICE" ];
NoNewPrivileges = true;
ProtectSystem = "strict";
ProtectHome = true;
PrivateTmp = true;
ProtectUsers = true;
ProtectKernelLogs = true;
PrivateDevices = true;
ProtectHostname = true;
ProtectKernelTunables = true;
ProtectKernelModules = true;
ProtectControlGroups = true;
RestrictAddressFamilies = [ "AF_INET" "AF_INET6" ];
RestrictNamespaces = true;
LockPersonality = true;
MemoryDenyWriteExecute = true;
RestrictRealtime = true;
RestrictSUIDSGID = true;
PrivateMounts = true;
SystemCallArchitectures = "native";
ProtectClock = true;
SystemCallFilter= [ "~@mount" "~@reboot" "~@swap" "~@module" "~@debug" "~@cpu-emulation" "SystemCallFilter=~@obsolete" ];
};
};
users.users.smtp-forward = {
description = "smtp-forward user";
group = "nogroup";
extraGroups = [ "keys" ];
uid = config.ids.uids.firebird;
};
};
}
|
