b68e64ec72
On the fly create certificates via openssl (Maybe change this to libressl in the future?). This is probably the best scheme to get something that simply works. Self signed certificates only pose a problem when connecting to retrieve the email via imap or pop3.
61 lines
2.1 KiB
Nix
61 lines
2.1 KiB
Nix
# nixos-mailserver: a simple mail server
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# Copyright (C) 2016-2017 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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{ pkgs, mail_dir, vmail_group_name, certificate_scheme, cert_dir, host_prefix,
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domain }:
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let
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create_certificate = if certificate_scheme == 2 then
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''
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# Create certificates if they do not exist yet
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dir="${cert_dir}"
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fqdn="${host_prefix}.${domain}"
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case $fqdn in /*) fqdn=$(cat "$fqdn");; esac
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key="''${dir}/key-${domain}.pem";
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cert="''${dir}/cert-${domain}.pem";
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if [ ! -f "''${key}" ] || [ ! -f "''${cert}" ]
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then
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mkdir -p "${cert_dir}"
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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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in
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{
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# Set the correct permissions for dovecot vmail folder. See
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# <http://wiki2.dovecot.org/SharedMailboxes/Permissions>. We choose
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# to use the systemd service to set the folder permissions whenever
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# dovecot gets started.
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services.dovecot2.preStart =
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''
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# Create mail directory and set permissions
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mkdir -p "${mail_dir}"
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chgrp "${vmail_group_name}" "${mail_dir}"
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chmod 02770 "${mail_dir}"
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${create_certificate}
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'';
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# Check for certificate before both postfix and dovecot to make sure it
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# exists.
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services.postfix.preStart =
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''
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${create_certificate}
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'';
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}
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