mirror of
https://gitlab.com/simple-nixos-mailserver/nixos-mailserver.git
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86 lines
2.9 KiB
Nix
86 lines
2.9 KiB
Nix
# nixos-mailserver: a simple mail server
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# Copyright (C) 2016-2018 Robin Raymond
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>
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{ config, pkgs, lib, ... }:
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let
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cfg = config.mailserver;
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certificatesDeps =
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if cfg.certificateScheme == 1 then
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[]
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else if cfg.certificateScheme == 2 then
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[ "mailserver-selfsigned-certificate.service" ]
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else
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[ "acme-finished-${cfg.fqdn}.target" ];
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in
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{
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config = with cfg; lib.mkIf enable {
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# Create self signed certificate
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systemd.services.mailserver-selfsigned-certificate = lib.mkIf (cfg.certificateScheme == 2) {
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after = [ "local-fs.target" ];
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script = ''
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# Create certificates if they do not exist yet
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dir="${cfg.certificateDirectory}"
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fqdn="${cfg.fqdn}"
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[[ $fqdn == /* ]] && fqdn=$(< "$fqdn")
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key="$dir/key-${cfg.fqdn}.pem";
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cert="$dir/cert-${cfg.fqdn}.pem";
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if [[ ! -f $key || ! -f $cert ]]; then
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mkdir -p "${cfg.certificateDirectory}"
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(umask 077; "${pkgs.openssl}/bin/openssl" genrsa -out "$key" 2048) &&
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"${pkgs.openssl}/bin/openssl" req -new -key "$key" -x509 -subj "/CN=$fqdn" \
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-days 3650 -out "$cert"
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fi
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'';
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serviceConfig = {
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Type = "oneshot";
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PrivateTmp = true;
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};
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};
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# Create maildir folder before dovecot startup
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systemd.services.dovecot2 = {
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wants = certificatesDeps;
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after = certificatesDeps;
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preStart = let
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directories = lib.strings.escapeShellArgs (
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[ mailDirectory ]
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++ lib.optional
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(cfg.fullTextSearch.enable && (cfg.fullTextSearch.indexDir != null))
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cfg.fullTextSearch.indexDir
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);
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in ''
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# Create mail directory and set permissions. See
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# <http://wiki2.dovecot.org/SharedMailboxes/Permissions>.
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mkdir -p ${directories}
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chgrp "${vmailGroupName}" ${directories}
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chmod 02770 ${directories}
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'';
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};
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# Postfix requires dovecot lmtp socket, dovecot auth socket and certificate to work
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systemd.services.postfix = {
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wants = certificatesDeps;
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after = [ "dovecot2.service" ]
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++ lib.optional cfg.dkimSigning "opendkim.service"
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++ certificatesDeps;
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requires = [ "dovecot2.service" ]
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++ lib.optional cfg.dkimSigning "opendkim.service";
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};
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};
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}
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