Merge pull request #27958 from LumiGuide/strongswan-swanctl
nixos: add the strongswan-swanctl service
This commit is contained in:
Matthew Justin Bauer
GitHub
commit
e4717c902f
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@ -560,6 +560,7 @@
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./services/networking/ssh/lshd.nix
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./services/networking/ssh/sshd.nix
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./services/networking/strongswan.nix
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./services/networking/strongswan-swanctl/module.nix
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./services/networking/stunnel.nix
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./services/networking/supplicant.nix
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./services/networking/supybot.nix
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@ -0,0 +1,82 @@
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{ config, lib, pkgs, ... }:
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with lib;
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with (import ./param-lib.nix lib);
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let
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cfg = config.services.strongswan-swanctl;
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swanctlParams = import ./swanctl-params.nix lib;
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in {
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options.services.strongswan-swanctl = {
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enable = mkEnableOption "strongswan-swanctl service";
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package = mkOption {
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type = types.package;
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default = pkgs.strongswan;
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defaultText = "pkgs.strongswan";
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description = ''
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The strongswan derivation to use.
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'';
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};
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strongswan.extraConfig = mkOption {
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type = types.str;
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default = "";
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description = ''
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Contents of the <literal>strongswan.conf</literal> file.
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'';
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};
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swanctl = paramsToOptions swanctlParams;
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};
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config = mkIf cfg.enable {
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assertions = [
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{ assertion = !config.services.strongswan.enable;
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message = "cannot enable both services.strongswan and services.strongswan-swanctl. Choose either one.";
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}
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];
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environment.etc."swanctl/swanctl.conf".text =
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paramsToConf cfg.swanctl swanctlParams;
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# The swanctl command complains when the following directories don't exist:
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# See: https://wiki.strongswan.org/projects/strongswan/wiki/Swanctldirectory
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system.activationScripts.strongswan-swanctl-etc = stringAfter ["etc"] ''
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mkdir -p '/etc/swanctl/x509' # Trusted X.509 end entity certificates
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mkdir -p '/etc/swanctl/x509ca' # Trusted X.509 Certificate Authority certificates
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mkdir -p '/etc/swanctl/x509ocsp'
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mkdir -p '/etc/swanctl/x509aa' # Trusted X.509 Attribute Authority certificates
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mkdir -p '/etc/swanctl/x509ac' # Attribute Certificates
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mkdir -p '/etc/swanctl/x509crl' # Certificate Revocation Lists
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mkdir -p '/etc/swanctl/pubkey' # Raw public keys
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mkdir -p '/etc/swanctl/private' # Private keys in any format
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mkdir -p '/etc/swanctl/rsa' # PKCS#1 encoded RSA private keys
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mkdir -p '/etc/swanctl/ecdsa' # Plain ECDSA private keys
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mkdir -p '/etc/swanctl/bliss'
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mkdir -p '/etc/swanctl/pkcs8' # PKCS#8 encoded private keys of any type
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mkdir -p '/etc/swanctl/pkcs12' # PKCS#12 containers
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'';
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systemd.services.strongswan-swanctl = {
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description = "strongSwan IPsec IKEv1/IKEv2 daemon using swanctl";
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wantedBy = [ "multi-user.target" ];
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after = [ "network-online.target" "keys.target" ];
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wants = [ "keys.target" ];
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path = with pkgs; [ kmod iproute iptables utillinux ];
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environment.STRONGSWAN_CONF = pkgs.writeTextFile {
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name = "strongswan.conf";
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text = cfg.strongswan.extraConfig;
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};
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restartTriggers = [ config.environment.etc."swanctl/swanctl.conf".source ];
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serviceConfig = {
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ExecStart = "${cfg.package}/sbin/charon-systemd";
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Type = "notify";
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ExecStartPost = "${cfg.package}/sbin/swanctl --load-all --noprompt";
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ExecReload = "${cfg.package}/sbin/swanctl --reload";
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Restart = "on-abnormal";
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};
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};
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};
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}
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@ -0,0 +1,162 @@
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# In the following context a parameter is an attribute set that
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# contains a NixOS option and a render function. It also contains the
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# attribute: '_type = "param"' so we can distinguish it from other
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# sets.
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#
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# The render function is used to convert the value of the option to a
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# snippet of strongswan.conf. Most parameters simply render their
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# value to a string. For example, take the following parameter:
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#
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# threads = mkIntParam 10 "Threads to use for request handling.";
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#
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# When a users defines the corresponding option as for example:
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#
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# services.strongswan-swanctl.strongswan.threads = 32;
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#
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# It will get rendered to the following snippet in strongswan.conf:
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#
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# threads = 32
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#
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# Some parameters however need to be able to change the attribute
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# name. For example, take the following parameter:
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#
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# id = mkPrefixedAttrsOfParam (mkOptionalStrParam "") "...";
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#
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# A user can define the corresponding option as for example:
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#
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# id = {
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# "foo" = "bar";
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# "baz" = "qux";
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# };
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#
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# This will get rendered to the following snippet:
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#
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# foo-id = bar
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# baz-id = qux
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#
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# For this reason the render function is not simply a function from
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# value -> string but a function from a value to an attribute set:
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# { "${name}" = string }. This allows parameters to change the attribute
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# name like in the previous example.
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lib :
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with lib;
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with (import ./param-lib.nix lib);
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rec {
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mkParamOfType = type : strongswanDefault : description : {
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_type = "param";
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option = mkOption {
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type = types.nullOr type;
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default = null;
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description = documentDefault description strongswanDefault;
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};
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render = single toString;
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};
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documentDefault = description : strongswanDefault :
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if isNull strongswanDefault
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then description
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else description + ''
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</para><para>
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StrongSwan default: <literal><![CDATA[${builtins.toJSON strongswanDefault}]]></literal>
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'';
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single = f: name: value: { "${name}" = f value; };
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mkStrParam = mkParamOfType types.str;
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mkOptionalStrParam = mkStrParam null;
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mkEnumParam = values : mkParamOfType (types.enum values);
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mkIntParam = mkParamOfType types.int;
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mkOptionalIntParam = mkIntParam null;
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# We should have floats in Nix...
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mkFloatParam = mkStrParam;
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# TODO: Check for hex format:
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mkHexParam = mkStrParam;
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mkOptionalHexParam = mkOptionalStrParam;
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# TODO: Check for duration format:
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mkDurationParam = mkStrParam;
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mkOptionalDurationParam = mkOptionalStrParam;
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mkYesNoParam = strongswanDefault : description : {
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_type = "param";
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option = mkOption {
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type = types.nullOr types.bool;
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default = null;
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description = documentDefault description strongswanDefault;
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};
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render = single (b: if b then "yes" else "no");
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};
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yes = true;
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no = false;
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mkSpaceSepListParam = mkSepListParam " ";
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mkCommaSepListParam = mkSepListParam ",";
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mkSepListParam = sep : strongswanDefault : description : {
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_type = "param";
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option = mkOption {
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type = types.nullOr (types.listOf types.str);
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default = null;
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description = documentDefault description strongswanDefault;
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};
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render = single (value: concatStringsSep sep value);
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};
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mkAttrsOfParams = params :
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mkAttrsOf params (types.submodule {options = paramsToOptions params;});
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mkAttrsOfParam = param :
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mkAttrsOf param param.option.type;
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mkAttrsOf = param : option : description : {
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_type = "param";
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option = mkOption {
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type = types.attrsOf option;
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default = {};
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inherit description;
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};
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render = single (attrs:
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(paramsToRenderedStrings attrs
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(mapAttrs (_n: _v: param) attrs)));
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};
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mkPrefixedAttrsOfParams = params :
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mkPrefixedAttrsOf params (types.submodule {options = paramsToOptions params;});
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mkPrefixedAttrsOfParam = param :
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mkPrefixedAttrsOf param param.option.type;
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mkPrefixedAttrsOf = p : option : description : {
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_type = "param";
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option = mkOption {
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type = types.attrsOf option;
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default = {};
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inherit description;
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};
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render = prefix: attrs:
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let prefixedAttrs = mapAttrs' (name: nameValuePair "${prefix}-${name}") attrs;
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in paramsToRenderedStrings prefixedAttrs
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(mapAttrs (_n: _v: p) prefixedAttrs);
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};
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mkPostfixedAttrsOfParams = params : description : {
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_type = "param";
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option = mkOption {
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type = types.attrsOf (types.submodule {options = paramsToOptions params;});
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default = {};
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inherit description;
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};
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render = postfix: attrs:
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let postfixedAttrs = mapAttrs' (name: nameValuePair "${name}-${postfix}") attrs;
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in paramsToRenderedStrings postfixedAttrs
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(mapAttrs (_n: _v: params) postfixedAttrs);
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};
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}
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@ -0,0 +1,82 @@
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lib :
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with lib;
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rec {
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paramsToConf = cfg : ps : mkConf 0 (paramsToRenderedStrings cfg ps);
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# mkConf takes an indentation level (which usually starts at 0) and a nested
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# attribute set of strings and will render that set to a strongswan.conf style
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# configuration format. For example:
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#
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# mkConf 0 {a = "1"; b = { c = { "foo" = "2"; "bar" = "3"; }; d = "4";};} => ''
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# a = 1
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# b {
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# c {
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# foo = 2
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# bar = 3
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# }
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# d = 4
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# }''
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mkConf = indent : ps :
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concatMapStringsSep "\n"
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(name:
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let value = ps."${name}";
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indentation = replicate indent " ";
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in
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indentation + (
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if isAttrs value
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then "${name} {\n" +
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mkConf (indent + 2) value + "\n" +
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indentation + "}"
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else "${name} = ${value}"
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)
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)
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(attrNames ps);
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replicate = n : c : concatStrings (builtins.genList (_x : c) n);
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# `paramsToRenderedStrings cfg ps` converts the NixOS configuration `cfg`
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# (typically the "config" argument of a NixOS module) and the set of
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# parameters `ps` (an attribute set where the values are constructed using the
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# parameter constructors in ./param-constructors.nix) to a nested attribute
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# set of strings (rendered parameters).
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paramsToRenderedStrings = cfg : ps :
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filterEmptySets (
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(mapParamsRecursive (path: name: param:
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let value = attrByPath path null cfg;
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in optionalAttrs (!isNull value) (param.render name value)
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) ps));
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filterEmptySets = set : filterAttrs (n: v: !(isNull v)) (mapAttrs (name: value:
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if isAttrs value
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then let value' = filterEmptySets value;
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in if value' == {}
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then null
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else value'
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else value
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) set);
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# Recursively map over every parameter in the given attribute set.
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mapParamsRecursive = mapAttrsRecursiveCond' (as: (!(as ? "_type" && as._type == "param")));
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mapAttrsRecursiveCond' = cond: f: set:
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let
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recurse = path: set:
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let
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g =
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name: value:
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if isAttrs value && cond value
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then { "${name}" = recurse (path ++ [name]) value; }
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else f (path ++ [name]) name value;
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in mapAttrs'' g set;
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in recurse [] set;
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mapAttrs'' = f: set:
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foldl' (a: b: a // b) {} (map (attr: f attr set.${attr}) (attrNames set));
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# Extract the options from the given set of parameters.
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paramsToOptions = ps :
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mapParamsRecursive (_path: name: param: { "${name}" = param.option; }) ps;
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}
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File diff suppressed because it is too large
Load diff
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@ -384,6 +384,7 @@ in rec {
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tests.smokeping = callTest tests/smokeping.nix {};
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tests.snapper = callTest tests/snapper.nix {};
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tests.statsd = callTest tests/statsd.nix {};
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tests.strongswan-swanctl = callTest tests/strongswan-swanctl.nix {};
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tests.sudo = callTest tests/sudo.nix {};
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tests.systemd = callTest tests/systemd.nix {};
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tests.switchTest = callTest tests/switch-test.nix {};
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148
nixos/tests/strongswan-swanctl.nix
Normal file
148
nixos/tests/strongswan-swanctl.nix
Normal file
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@ -0,0 +1,148 @@
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# This strongswan-swanctl test is based on:
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# https://www.strongswan.org/testing/testresults/swanctl/rw-psk-ipv4/index.html
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# https://github.com/strongswan/strongswan/tree/master/testing/tests/swanctl/rw-psk-ipv4
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#
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# The roadwarrior carol sets up a connection to gateway moon. The authentication
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# is based on pre-shared keys and IPv4 addresses. Upon the successful
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# establishment of the IPsec tunnels, the specified updown script automatically
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# inserts iptables-based firewall rules that let pass the tunneled traffic. In
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# order to test both tunnel and firewall, carol pings the client alice behind
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# the gateway moon.
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#
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# alice moon carol
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# eth1------vlan_0------eth1 eth2------vlan_1------eth1
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# 192.168.0.1 192.168.0.3 192.168.1.3 192.168.1.2
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#
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# See the NixOS manual for how to run this test:
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# https://nixos.org/nixos/manual/index.html#sec-running-nixos-tests-interactively
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import ./make-test.nix ({ pkgs, ...} :
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let
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allowESP = "iptables --insert INPUT --protocol ESP --jump ACCEPT";
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# Shared VPN settings:
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vlan0 = "192.168.0.0/24";
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carolIp = "192.168.1.2";
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moonIp = "192.168.1.3";
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version = 2;
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secret = "0sFpZAZqEN6Ti9sqt4ZP5EWcqx";
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esp_proposals = [ "aes128gcm128-x25519" ];
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proposals = [ "aes128-sha256-x25519" ];
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in {
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name = "strongswan-swanctl";
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meta.maintainers = with pkgs.stdenv.lib.maintainers; [ basvandijk ];
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nodes = {
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alice = { nodes, ... } : {
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virtualisation.vlans = [ 0 ];
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networking = {
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dhcpcd.enable = false;
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defaultGateway = "192.168.0.3";
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};
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};
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moon = {pkgs, config, nodes, ...} :
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let strongswan = config.services.strongswan-swanctl.package;
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in {
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virtualisation.vlans = [ 0 1 ];
|
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networking = {
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dhcpcd.enable = false;
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firewall = {
|
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allowedUDPPorts = [ 4500 500 ];
|
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extraCommands = allowESP;
|
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};
|
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nat = {
|
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enable = true;
|
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internalIPs = [ vlan0 ];
|
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internalInterfaces = [ "eth1" ];
|
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externalIP = moonIp;
|
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externalInterface = "eth2";
|
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};
|
||||
};
|
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environment.systemPackages = [ strongswan ];
|
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services.strongswan-swanctl = {
|
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enable = true;
|
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swanctl = {
|
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connections = {
|
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"rw" = {
|
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local_addrs = [ moonIp ];
|
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local."main" = {
|
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auth = "psk";
|
||||
};
|
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remote."main" = {
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auth = "psk";
|
||||
};
|
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children = {
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"net" = {
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local_ts = [ vlan0 ];
|
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updown = "${strongswan}/libexec/ipsec/_updown iptables";
|
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inherit esp_proposals;
|
||||
};
|
||||
};
|
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inherit version;
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inherit proposals;
|
||||
};
|
||||
};
|
||||
secrets = {
|
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ike."carol" = {
|
||||
id."main" = carolIp;
|
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inherit secret;
|
||||
};
|
||||
};
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
carol = {pkgs, config, nodes, ...} :
|
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let strongswan = config.services.strongswan-swanctl.package;
|
||||
in {
|
||||
virtualisation.vlans = [ 1 ];
|
||||
networking = {
|
||||
dhcpcd.enable = false;
|
||||
firewall.extraCommands = allowESP;
|
||||
};
|
||||
environment.systemPackages = [ strongswan ];
|
||||
services.strongswan-swanctl = {
|
||||
enable = true;
|
||||
swanctl = {
|
||||
connections = {
|
||||
"home" = {
|
||||
local_addrs = [ carolIp ];
|
||||
remote_addrs = [ moonIp ];
|
||||
local."main" = {
|
||||
auth = "psk";
|
||||
id = carolIp;
|
||||
};
|
||||
remote."main" = {
|
||||
auth = "psk";
|
||||
id = moonIp;
|
||||
};
|
||||
children = {
|
||||
"home" = {
|
||||
remote_ts = [ vlan0 ];
|
||||
start_action = "trap";
|
||||
updown = "${strongswan}/libexec/ipsec/_updown iptables";
|
||||
inherit esp_proposals;
|
||||
};
|
||||
};
|
||||
inherit version;
|
||||
inherit proposals;
|
||||
};
|
||||
};
|
||||
secrets = {
|
||||
ike."moon" = {
|
||||
id."main" = moonIp;
|
||||
inherit secret;
|
||||
};
|
||||
};
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
};
|
||||
testScript = ''
|
||||
startAll();
|
||||
$carol->waitUntilSucceeds("ping -c 1 alice");
|
||||
'';
|
||||
})
|
||||
Loading…
Reference in a new issue