5b570ad5a0
This allows determining whether it's OK to use particular configuration variables that will throw errors when used in older versions.
113 lines
3.9 KiB
Nix
113 lines
3.9 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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create_certificate = if cfg.certificateScheme == 2 then
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''
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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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case $fqdn in /*) fqdn=$(cat "$fqdn");; esac
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key="''${dir}/key-${cfg.fqdn}.pem";
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cert="''${dir}/cert-${cfg.fqdn}.pem";
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if [ ! -f "''${key}" ] || [ ! -f "''${cert}" ]
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then
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mkdir -p "${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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else "";
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createDhParameterFile =
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''
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# Create a dh parameter file
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${pkgs.openssl}/bin/openssl \
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dhparam ${builtins.toString cfg.dhParamBitLength} \
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> "${cfg.certificateDirectory}/dh.pem"
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'';
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createDomainDkimCert = dom:
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let
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dkim_key = "${cfg.dkimKeyDirectory}/${dom}.${cfg.dkimSelector}.key";
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dkim_txt = "${cfg.dkimKeyDirectory}/${dom}.${cfg.dkimSelector}.txt";
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in
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''
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if [ ! -f "${dkim_key}" ] || [ ! -f "${dkim_txt}" ]
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then
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${pkgs.opendkim}/bin/opendkim-genkey -s "${cfg.dkimSelector}" \
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-d "${dom}" \
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--directory="${cfg.dkimKeyDirectory}"
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mv "${cfg.dkimKeyDirectory}/${cfg.dkimSelector}.private" "${dkim_key}"
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mv "${cfg.dkimKeyDirectory}/${cfg.dkimSelector}.txt" "${dkim_txt}"
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fi
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'';
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createAllCerts = lib.concatStringsSep "\n" (map createDomainDkimCert cfg.domains);
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create_dkim_cert =
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''
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# Create dkim dir
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mkdir -p "${cfg.dkimKeyDirectory}"
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chown rmilter:rmilter "${cfg.dkimKeyDirectory}"
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${createAllCerts}
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chown -R rmilter:rmilter "${cfg.dkimKeyDirectory}"
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'';
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in
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{
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config = with cfg; lib.mkIf enable {
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# Make sure postfix gets started first, so that the certificates are in place
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systemd.services.dovecot2.after = [ "postfix.service" ];
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# Create certificates and maildir folder
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systemd.services.postfix = {
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after = (if (certificateScheme == 3) then [ "nginx.service" ] else []);
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preStart =
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''
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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 "${mailDirectory}"
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chgrp "${vmailGroupName}" "${mailDirectory}"
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chmod 02770 "${mailDirectory}"
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${create_certificate}
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${let
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dovecotVersion = builtins.fromJSON
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(builtins.readFile (pkgs.callPackage ./dovecot-version.nix {}));
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in lib.optionalString
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(dovecotVersion.major == 2 && dovecotVersion.minor >= 3)
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createDhParameterFile}
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'';
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};
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# Create dkim certificates
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systemd.services.rmilter = {
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requires = [ "rmilter.socket" ];
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after = [ "rmilter.socket" ];
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preStart =
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''
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${create_dkim_cert}
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'';
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};
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};
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}
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