commit aa241aed14a76a87b04819ac7a6bee645c7a5e70 · pyrox.dev/nixpkgs

nixos/modules/module-list.nix

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         ./services/logging/rsyslogd.nix

     

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         ./services/logging/syslog-ng.nix

     

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         ./services/logging/syslogd.nix

     

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         ./services/mail/dkimproxy-out.nix

     

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         ./services/mail/dovecot.nix

     

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         ./services/mail/dspam.nix

     

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         ./services/mail/exim.nix

+118

nixos/modules/services/mail/dkimproxy-out.nix

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       { config, lib, pkgs, ... }:

     

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       with lib;

     

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       let

     

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         cfg = config.services.dkimproxy-out;

     

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         keydir = "/var/lib/dkimproxy-out";

     

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         privkey = "${keydir}/private.key";

     

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         pubkey = "${keydir}/public.key";

     

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       in

     

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       {

     

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         ##### interface

     

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         options = {

     

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           services.dkimproxy-out = {

     

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             enable = mkOption {

     

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               type = types.bool;

     

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               default = false;

     

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               description =

     

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                 ''

     

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                   Whether to enable dkimproxy_out.

     

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                   Note that a key will be auto-generated, and can be found in

     

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                   ${keydir}.

     

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                 '';

     

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             };

     

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             listen = mkOption {

     

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               type = types.str;

     

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               example = "127.0.0.1:10027";

     

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               description = "Address:port DKIMproxy should listen on.";

     

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             };

     

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             relay = mkOption {

     

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               type = types.str;

     

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               example = "127.0.0.1:10028";

     

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               description = "Address:port DKIMproxy should forward mail to.";

     

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             };

     

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             domains = mkOption {

     

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               type = with types; listOf str;

     

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               example = [ "example.org" "example.com" ];

     

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               description = "List of domains DKIMproxy can sign for.";

     

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             };

     

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             selector = mkOption {

     

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               type = types.str;

     

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               example = "selector1";

     

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               description =

     

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                 ''

     

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                   The selector to use for DKIM key identification.

     

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                   For example, if 'selector1' is used here, then for each domain

     

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                   'example.org' given in `domain`, 'selector1._domainkey.example.org'

     

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                   should contain the TXT record indicating the public key is the one

     

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                   in ${pubkey}: "v=DKIM1; t=s; p=[THE PUBLIC KEY]".

     

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                 '';

     

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             };

     

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             keySize = mkOption {

     

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               type = types.int;

     

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               default = 2048;

     

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               description =

     

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                 ''

     

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                   Size of the RSA key to use to sign outgoing emails. Note that the

     

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                   maximum mandatorily verified as per RFC6376 is 2048.

     

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                 '';

     

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             };

     

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             # TODO: allow signature for other schemes than dkim(c=relaxed/relaxed)?

     

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             # This being the scheme used by gmail, maybe nothing more is needed for

     

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             # reasonable use.

     

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           };

     

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         };

     

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         ##### implementation

     

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         config = let

     

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           configfile = pkgs.writeText "dkimproxy_out.conf"

     

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             ''

     

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               listen ${cfg.listen}

     

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               relay ${cfg.relay}

     

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               domain ${concatStringsSep "," cfg.domains}

     

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               selector ${cfg.selector}

     

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               signature dkim(c=relaxed/relaxed)

     

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               keyfile ${privkey}

     

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             '';

     

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         in

     

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           mkIf cfg.enable {

     

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             users.groups.dkimproxy-out = {};

     

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             users.users.dkimproxy-out = {

     

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               description = "DKIMproxy_out daemon";

     

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               group = "dkimproxy-out";

     

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               isSystemUser = true;

     

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             };

     

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             systemd.services.dkimproxy-out = {

     

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               description = "DKIMproxy_out";

     

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               wantedBy = [ "multi-user.target" ];

     

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               preStart = ''

     

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                 if [ ! -d "${keydir}" ]; then

     

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                   mkdir -p "${keydir}"

     

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                   chmod 0700 "${keydir}"

     

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                   ${pkgs.openssl}/bin/openssl genrsa -out "${privkey}" ${toString cfg.keySize}

     

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                   ${pkgs.openssl}/bin/openssl rsa -in "${privkey}" -pubout -out "${pubkey}"

     

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                   chown -R dkimproxy-out:dkimproxy-out "${keydir}"

     

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                 fi

     

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               '';

     

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               script = ''

     

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                 exec ${pkgs.dkimproxy}/bin/dkimproxy.out --conf_file=${configfile}

     

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               '';

     

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               serviceConfig = {

     

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                 User = "dkimproxy-out";

     

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                 PermissionsStartOnly = true;

     

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               };

     

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             };

     

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           };

     

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       }