misc_nixos-mailserver/mail-server/systemd.nix
Robin Raymond bf7099d389 fix issue #8
turns out this is a upstream bug. The fix should probably be pushed to nixpkgs.
2017-09-13 11:49:33 +02:00

88 lines
3 KiB
Nix

# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2017 Robin Raymond
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>
{ config, pkgs, lib, ... }:
let
cfg = config.mailserver;
create_certificate = if cfg.certificateScheme == 2 then
''
# Create certificates if they do not exist yet
dir="${cfg.certificateDirectory}"
fqdn="${cfg.hostPrefix}.${cfg.domain}"
case $fqdn in /*) fqdn=$(cat "$fqdn");; esac
key="''${dir}/key-${cfg.domain}.pem";
cert="''${dir}/cert-${cfg.domain}.pem";
if [ ! -f "''${key}" ] || [ ! -f "''${cert}" ]
then
mkdir -p "${cfg.certificateDirectory}"
(umask 077; "${pkgs.openssl}/bin/openssl" genrsa -out "''${key}" 2048) &&
"${pkgs.openssl}/bin/openssl" req -new -key "''${key}" -x509 -subj "/CN=''${fqdn}" \
-days 3650 -out "''${cert}"
fi
''
else "";
dkim_key = "${cfg.dkimKeyDirectory}/${cfg.dkimSelector}.private";
dkim_txt = "${cfg.dkimKeyDirectory}/${cfg.dkimSelector}.txt";
create_dkim_cert =
''
# Create dkim dir
mkdir -p "${cfg.dkimKeyDirectory}"
chown rmilter:rmilter "${cfg.dkimKeyDirectory}"
if [ ! -f "${dkim_key}" ] || [ ! -f "${dkim_txt}" ]
then
${pkgs.opendkim}/bin/opendkim-genkey -s "${cfg.dkimSelector}" \
-d ${cfg.domain} \
--directory="${cfg.dkimKeyDirectory}"
chown rmilter:rmilter "${dkim_key}"
fi
'';
in
{
config = with cfg; lib.mkIf enable {
# Make sure postfix gets started first, so that the certificates are in place
systemd.services.dovecot2.after = [ "postfix.service" ];
# Create certificates and maildir folder
systemd.services.postfix = {
preStart =
''
# Create mail directory and set permissions. See
# <http://wiki2.dovecot.org/SharedMailboxes/Permissions>.
mkdir -p "${mailDirectory}"
chgrp "${vmailGroupName}" "${mailDirectory}"
chmod 02770 "${mailDirectory}"
${create_certificate}
'';
};
# Create dkim certificates
systemd.services.rmilter = {
requires = [ "rmilter.socket" ];
after = [ "rmilter.socket" ];
preStart =
''
${create_dkim_cert}
'';
};
};
}