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# nixos-mailserver: a simple mail server
# Copyright (C) 2016-2018 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;
in
{
# cert :: PATH
certificatePath = if cfg.certificateScheme == "manual"
then cfg.certificateFile
else if cfg.certificateScheme == "selfsigned"
then "${cfg.certificateDirectory}/cert-${cfg.fqdn}.pem"
else if cfg.certificateScheme == "acme" || cfg.certificateScheme == "acme-nginx"
then "${config.security.acme.certs.${cfg.fqdn}.directory}/fullchain.pem"
else throw "unknown certificate scheme";
# key :: PATH
keyPath = if cfg.certificateScheme == "manual"
then cfg.keyFile
else if cfg.certificateScheme == "selfsigned"
then "${cfg.certificateDirectory}/key-${cfg.fqdn}.pem"
else if cfg.certificateScheme == "acme" || cfg.certificateScheme == "acme-nginx"
then "${config.security.acme.certs.${cfg.fqdn}.directory}/key.pem"
else throw "unknown certificate scheme";
passwordFiles = let
mkHashFile = name: hash: pkgs.writeText "${builtins.hashString "sha256" name}-password-hash" hash;
in
lib.mapAttrs (name: value:
if value.hashedPasswordFile == null then
builtins.toString (mkHashFile name value.hashedPassword)
else value.hashedPasswordFile) cfg.loginAccounts;
# Appends the LDAP bind password to files to avoid writing this
# password into the Nix store.
appendLdapBindPwd = {
name, file, prefix, passwordFile, destination
}: pkgs.writeScript "append-ldap-bind-pwd-in-${name}" ''
#!${pkgs.stdenv.shell}
set -euo pipefail
baseDir=$(dirname ${destination})
if (! test -d "$baseDir"); then
mkdir -p $baseDir
chmod 755 $baseDir
fi
cat ${file} > ${destination}
echo -n "${prefix}" >> ${destination}
cat ${passwordFile} >> ${destination}
chmod 600 ${destination}
'';
}
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