a948c49ca7
Add a certificate scheme for using an existing ACME certificate without setting up Nginx. Also use names instead of magic numbers for certificate schemes.
83 lines
2.9 KiB
Nix
83 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 == "manual" then
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[]
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else if cfg.certificateScheme == "selfsigned" then
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[ "mailserver-selfsigned-certificate.service" ]
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else
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[ "acme-finished-${cfg.fqdn}.target" ];
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in
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{
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config = with cfg; lib.mkIf enable {
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# Create self signed certificate
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systemd.services.mailserver-selfsigned-certificate = lib.mkIf (cfg.certificateScheme == "selfsigned") {
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after = [ "local-fs.target" ];
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script = ''
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# Create certificates if they do not exist yet
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dir="${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 (cfg.indexDir != null) cfg.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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