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nixos/stunnel: Make free-form
This unlocks stunnel's other ~100 configuration directives, allowing full stunnel use in NixOS.
This commit is contained in:
Scott Worley
parent
61585d1cd7
commit
131399effb
@ -7,80 +7,27 @@ let
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cfg = config.services.stunnel;
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yesNo = val: if val then "yes" else "no";
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verifyRequiredField = type: field: n: c: {
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assertion = hasAttr field c;
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message = "stunnel: \"${n}\" ${type} configuration - Field ${field} is required.";
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};
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verifyChainPathAssert = n: c: {
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assertion = c.verifyHostname == null || (c.verifyChain || c.verifyPeer);
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assertion = (c.verifyHostname or null) == null || (c.verifyChain || c.verifyPeer);
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message = "stunnel: \"${n}\" client configuration - hostname verification " +
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"is not possible without either verifyChain or verifyPeer enabled";
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};
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serverConfig = {
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options = {
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accept = mkOption {
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type = types.either types.str types.int;
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description = ''
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On which [host:]port stunnel should listen for incoming TLS connections.
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Note that unlike other softwares stunnel ipv6 address need no brackets,
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so to listen on all IPv6 addresses on port 1234 one would use ':::1234'.
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'';
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};
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connect = mkOption {
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type = types.either types.str types.int;
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description = "Port or IP:Port to which the decrypted connection should be forwarded.";
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};
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cert = mkOption {
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type = types.path;
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description = "File containing both the private and public keys.";
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};
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};
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};
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clientConfig = {
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options = {
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accept = mkOption {
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type = types.str;
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description = "IP:Port on which connections should be accepted.";
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};
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connect = mkOption {
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type = types.str;
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description = "IP:Port destination to connect to.";
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};
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verifyChain = mkOption {
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type = types.bool;
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default = true;
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description = "Check if the provided certificate has a valid certificate chain (against CAPath).";
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};
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verifyPeer = mkOption {
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type = types.bool;
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default = false;
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description = "Check if the provided certificate is contained in CAPath.";
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};
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CAPath = mkOption {
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type = types.nullOr types.path;
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default = null;
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description = "Path to a directory containing certificates to validate against.";
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};
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CAFile = mkOption {
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type = types.nullOr types.path;
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default = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
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defaultText = literalExpression ''"''${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt"'';
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description = "Path to a file containing certificates to validate against.";
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};
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verifyHostname = mkOption {
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type = with types; nullOr str;
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default = null;
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description = "If set, stunnel checks if the provided certificate is valid for the given hostname.";
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};
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};
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};
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removeNulls = mapAttrs (_: filterAttrs (_: v: v != null));
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mkValueString = v:
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if v == true then "yes"
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else if v == false then "no"
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else generators.mkValueStringDefault {} v;
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generateConfig = c:
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generators.toINI {
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mkSectionName = id;
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mkKeyValue = k: v: "${k} = ${mkValueString v}";
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} (removeNulls c);
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in
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@ -130,8 +77,13 @@ in
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servers = mkOption {
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description = "Define the server configuations.";
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type = with types; attrsOf (submodule serverConfig);
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description = ''
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Define the server configuations.
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See "SERVICE-LEVEL OPTIONS" in <citerefentry><refentrytitle>stunnel</refentrytitle>
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<manvolnum>8</manvolnum></citerefentry>.
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'';
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type = with types; attrsOf (attrsOf (nullOr (oneOf [bool int str])));
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example = {
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fancyWebserver = {
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accept = 443;
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@ -143,8 +95,33 @@ in
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};
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clients = mkOption {
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description = "Define the client configurations.";
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type = with types; attrsOf (submodule clientConfig);
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description = ''
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Define the client configurations.
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By default, verifyChain and OCSPaia are enabled and a CAFile is provided from pkgs.cacert.
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See "SERVICE-LEVEL OPTIONS" in <citerefentry><refentrytitle>stunnel</refentrytitle>
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<manvolnum>8</manvolnum></citerefentry>.
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'';
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type = with types; attrsOf (attrsOf (nullOr (oneOf [bool int str])));
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apply = let
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applyDefaults = c:
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{
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CAFile = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";
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OCSPaia = true;
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verifyChain = true;
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} // c;
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setCheckHostFromVerifyHostname = c:
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# To preserve backward-compatibility with the old NixOS stunnel module
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# definition, allow "verifyHostname" as an alias for "checkHost".
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c // {
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checkHost = c.checkHost or c.verifyHostname or null;
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verifyHostname = null; # Not a real stunnel configuration setting
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};
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forceClient = c: c // { client = true; };
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in mapAttrs (_: c: forceClient (setCheckHostFromVerifyHostname (applyDefaults c)));
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example = {
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foobar = {
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accept = "0.0.0.0:8080";
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@ -169,6 +146,11 @@ in
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})
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(mapAttrsToList verifyChainPathAssert cfg.clients)
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(mapAttrsToList (verifyRequiredField "client" "accept") cfg.clients)
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(mapAttrsToList (verifyRequiredField "client" "connect") cfg.clients)
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(mapAttrsToList (verifyRequiredField "server" "accept") cfg.servers)
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(mapAttrsToList (verifyRequiredField "server" "cert") cfg.servers)
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(mapAttrsToList (verifyRequiredField "server" "connect") cfg.servers)
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];
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environment.systemPackages = [ pkgs.stunnel ];
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@ -183,36 +165,10 @@ in
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${ optionalString cfg.enableInsecureSSLv3 "options = -NO_SSLv3" }
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; ----- SERVER CONFIGURATIONS -----
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${ lib.concatStringsSep "\n"
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(lib.mapAttrsToList
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(n: v: ''
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[${n}]
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accept = ${toString v.accept}
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connect = ${toString v.connect}
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cert = ${v.cert}
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'')
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cfg.servers)
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}
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${ generateConfig cfg.servers }
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; ----- CLIENT CONFIGURATIONS -----
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${ lib.concatStringsSep "\n"
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(lib.mapAttrsToList
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(n: v: ''
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[${n}]
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client = yes
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accept = ${v.accept}
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connect = ${v.connect}
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verifyChain = ${yesNo v.verifyChain}
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verifyPeer = ${yesNo v.verifyPeer}
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${optionalString (v.CAPath != null) "CApath = ${v.CAPath}"}
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${optionalString (v.CAFile != null) "CAFile = ${v.CAFile}"}
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${optionalString (v.verifyHostname != null) "checkHost = ${v.verifyHostname}"}
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OCSPaia = yes
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'')
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cfg.clients)
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}
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${ generateConfig cfg.clients }
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'';
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systemd.services.stunnel = {
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