nixpkgs/nixos/modules/services/networking/strongswan-swanctl/module.nix
Bas van Dijk bd24b3addd nixos: add the strongswan-swanctl service
The strongswan-swanctl systemd service starts charon-systemd. This implements a IKE daemon
very similar to charon, but it's specifically designed for use with systemd. It uses the
systemd libraries for a native integration.

Instead of using starter and an ipsec.conf based configuration, the daemon is directly
managed by systemd and configured with the swanctl configuration backend.

See: https://wiki.strongswan.org/projects/strongswan/wiki/Charon-systemd

Note that the strongswan.conf and swantctl.conf configuration files are automatically
generated based on NixOS options under services.strongswan-swanctl.strongswan and
services.strongswan-swanctl.swanctl respectively.
2018-02-28 10:41:54 +01:00

81 lines
3.1 KiB
Nix

{ config, lib, pkgs, ... }:
with lib;
with (import ./param-lib.nix lib);
let
cfg = config.services.strongswan-swanctl;
# TODO: auto-generate these files using:
# https://github.com/strongswan/strongswan/tree/master/conf
# IDEA: extend the format-options.py script to output these Nix files.
strongswanParams = import ./strongswan-params.nix lib;
swanctlParams = import ./swanctl-params.nix lib;
in {
options.services.strongswan-swanctl = {
enable = mkEnableOption "strongswan-swanctl service";
package = mkOption {
type = types.package;
default = pkgs.strongswan;
defaultText = "pkgs.strongswan";
description = ''
The strongswan derivation to use.
'';
};
strongswan = paramsToOptions strongswanParams;
swanctl = paramsToOptions swanctlParams;
};
config = mkIf cfg.enable {
assertions = [
{ assertion = !config.services.strongswan.enable;
message = "cannot enable both services.strongswan and services.strongswan-swanctl. Choose either one.";
}
];
environment.etc."swanctl/swanctl.conf".text =
paramsToConf cfg.swanctl swanctlParams;
# The swanctl command complains when the following directories don't exist:
# See: https://wiki.strongswan.org/projects/strongswan/wiki/Swanctldirectory
system.activationScripts.strongswan-swanctl-etc = stringAfter ["etc"] ''
mkdir -p '/etc/swanctl/x509' # Trusted X.509 end entity certificates
mkdir -p '/etc/swanctl/x509ca' # Trusted X.509 Certificate Authority certificates
mkdir -p '/etc/swanctl/x509ocsp'
mkdir -p '/etc/swanctl/x509aa' # Trusted X.509 Attribute Authority certificates
mkdir -p '/etc/swanctl/x509ac' # Attribute Certificates
mkdir -p '/etc/swanctl/x509crl' # Certificate Revocation Lists
mkdir -p '/etc/swanctl/pubkey' # Raw public keys
mkdir -p '/etc/swanctl/private' # Private keys in any format
mkdir -p '/etc/swanctl/rsa' # PKCS#1 encoded RSA private keys
mkdir -p '/etc/swanctl/ecdsa' # Plain ECDSA private keys
mkdir -p '/etc/swanctl/bliss'
mkdir -p '/etc/swanctl/pkcs8' # PKCS#8 encoded private keys of any type
mkdir -p '/etc/swanctl/pkcs12' # PKCS#12 containers
'';
systemd.services.strongswan-swanctl = {
description = "strongSwan IPsec IKEv1/IKEv2 daemon using swanctl";
wantedBy = [ "multi-user.target" ];
after = [ "network-online.target" "keys.target" ];
wants = [ "keys.target" ];
path = with pkgs; [ kmod iproute iptables utillinux ];
environment.STRONGSWAN_CONF = pkgs.writeTextFile {
name = "strongswan.conf";
text = paramsToConf cfg.strongswan strongswanParams;
};
restartTriggers = [ config.environment.etc."swanctl/swanctl.conf".source ];
serviceConfig = {
ExecStart = "${cfg.package}/sbin/charon-systemd";
Type = "notify";
ExecStartPost = "${cfg.package}/sbin/swanctl --load-all --noprompt";
ExecReload = "${cfg.package}/sbin/swanctl --reload";
Restart = "on-abnormal";
};
};
};
}