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https://gitlab.com/simple-nixos-mailserver/nixos-mailserver.git
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248 lines
8.6 KiB
Nix
248 lines
8.6 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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{ pkgs ? import <nixpkgs> {}}:
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pkgs.nixosTest {
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name = "clamav";
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nodes = {
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server = { config, pkgs, lib, ... }:
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let
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clamav-db-files = pkgs.stdenv.mkDerivation rec {
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name = "clamav-db-files";
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src = lib.cleanSource ./clamav;
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dontUnpack = true;
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installPhase = ''
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mkdir $out
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cp -R $src/*.cvd $out/
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'';
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};
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in
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{
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imports = [
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../default.nix
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./lib/config.nix
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];
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virtualisation.memorySize = 1500;
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services.rsyslogd = {
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enable = true;
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defaultConfig = ''
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*.* /dev/console
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'';
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};
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services.clamav.updater.enable = lib.mkForce false;
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systemd.services.old-clam = {
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before = [ "clamav-daemon.service" ];
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requiredBy = [ "clamav-daemon.service" ];
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description = "ClamAV virus database";
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preStart = ''
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mkdir -m 0755 -p /var/lib/clamav
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chown clamav:clamav /var/lib/clamav
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'';
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script = ''
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cp ${clamav-db-files}/main.cvd /var/lib/clamav/
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cp ${clamav-db-files}/daily.cvd /var/lib/clamav/
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cp ${clamav-db-files}/bytecode.cvd /var/lib/clamav/
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chown clamav:clamav /var/lib/clamav/*
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'';
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serviceConfig = {
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Type = "oneshot";
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PrivateTmp = "yes";
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PrivateDevices = "yes";
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};
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};
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mailserver = {
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enable = true;
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fqdn = "mail.example.com";
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domains = [ "example.com" "example2.com" ];
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virusScanning = true;
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loginAccounts = {
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"user1@example.com" = {
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hashedPassword = "$6$/z4n8AQl6K$kiOkBTWlZfBd7PvF5GsJ8PmPgdZsFGN1jPGZufxxr60PoR0oUsrvzm2oQiflyz5ir9fFJ.d/zKm/NgLXNUsNX/";
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aliases = [ "postmaster@example.com" ];
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catchAll = [ "example.com" ];
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};
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"user@example2.com" = {
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hashedPassword = "$6$u61JrAtuI0a$nGEEfTP5.eefxoScUGVG/Tl0alqla2aGax4oTd85v3j3xSmhv/02gNfSemv/aaMinlv9j/ZABosVKBrRvN5Qv0";
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};
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};
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enableImap = true;
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};
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environment.etc = {
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"root/eicar.com.txt".text = "X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*";
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};
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};
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client = { nodes, config, pkgs, ... }: let
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serverIP = nodes.server.config.networking.primaryIPAddress;
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clientIP = nodes.client.config.networking.primaryIPAddress;
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grep-ip = pkgs.writeScriptBin "grep-ip" ''
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#!${pkgs.stdenv.shell}
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echo grep '${clientIP}' "$@" >&2
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exec grep '${clientIP}' "$@"
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'';
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in {
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imports = [
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./lib/config.nix
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];
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environment.systemPackages = with pkgs; [
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fetchmail msmtp procmail findutils grep-ip
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];
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environment.etc = {
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"root/.fetchmailrc" = {
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text = ''
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poll ${serverIP} with proto IMAP
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user 'user1@example.com' there with password 'user1' is 'root' here
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mda procmail
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'';
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mode = "0700";
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};
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"root/.procmailrc" = {
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text = "DEFAULT=$HOME/mail";
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};
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"root/.msmtprc" = {
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text = ''
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defaults
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tls on
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tls_certcheck off
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account user2
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host ${serverIP}
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port 587
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from user@example2.com
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auth on
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user user@example2.com
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password user2
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'';
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};
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"root/virus-email".text = ''
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From: User2 <user@example2.com>
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Content-Type: multipart/mixed;
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boundary="Apple-Mail=_2689C63E-FD18-4E4D-8822-54797BDA9607"
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Mime-Version: 1.0 (Mac OS X Mail 11.3 \(3445.6.18\))
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Subject: Testy McTest
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Message-Id: <94550DD9-1FF1-4ED1-9F09-8812FF2E59AA@example.com>
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Date: Sat, 12 May 2018 14:15:44 +0200
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To: User1 <user1@example.com>
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X-Mailer: Apple Mail (2.3445.6.18)
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--Apple-Mail=_2689C63E-FD18-4E4D-8822-54797BDA9607
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Content-Transfer-Encoding: 7bit
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Content-Type: text/plain;
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charset=us-ascii
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Hello
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I have attached a dangerous virus.
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Mfg.
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User2
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--Apple-Mail=_2689C63E-FD18-4E4D-8822-54797BDA9607
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Content-Disposition: attachment;
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filename=eicar.com.txt
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Content-Type: text/plain;
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x-unix-mode=0644;
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name="eicar.com.txt"
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Content-Transfer-Encoding: 7bit
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X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
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--Apple-Mail=_2689C63E-FD18-4E4D-8822-54797BDA9607--
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'';
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"root/safe-email".text = ''
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From: User <user@example2.com>
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To: User1 <user1@example.com>
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Cc:
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Bcc:
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Subject: This is a test Email from user@example2.com to user1
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Reply-To:
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Hello User1,
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how are you doing today?
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XOXO User1
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'';
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};
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};
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};
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testScript = { nodes, ... }:
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''
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start_all()
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server.wait_for_unit("multi-user.target")
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client.wait_for_unit("multi-user.target")
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# TODO put this blocking into the systemd units? I am not sure if rspamd already waits for the clamd socket.
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server.wait_until_succeeds(
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"timeout 1 ${nodes.server.pkgs.netcat}/bin/nc -U /run/rspamd/rspamd-milter.sock < /dev/null; [ $? -eq 124 ]"
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)
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server.wait_until_succeeds(
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"timeout 1 ${nodes.server.pkgs.netcat}/bin/nc -U /run/clamav/clamd.ctl < /dev/null; [ $? -eq 124 ]"
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)
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client.execute("cp -p /etc/root/.* ~/")
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client.succeed("mkdir -p ~/mail")
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client.succeed("ls -la ~/ >&2")
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client.succeed("cat ~/.fetchmailrc >&2")
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client.succeed("cat ~/.procmailrc >&2")
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client.succeed("cat ~/.msmtprc >&2")
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# fetchmail returns EXIT_CODE 1 when no new mail
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client.succeed("fetchmail --nosslcertck -v || [ $? -eq 1 ] >&2")
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# Verify that mail can be sent and received before testing virus scanner
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client.execute("rm ~/mail/*")
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client.succeed("msmtp -a user2 user1@example.com < /etc/root/safe-email >&2")
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# give the mail server some time to process the mail
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server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
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client.execute("rm ~/mail/*")
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# fetchmail returns EXIT_CODE 0 when it retrieves mail
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client.succeed("fetchmail --nosslcertck -v >&2")
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client.execute("rm ~/mail/*")
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with subtest("virus scan file"):
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server.succeed(
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'clamdscan $(readlink -f /etc/root/eicar.com.txt) | grep "Txt\\.Malware\\.Agent-1787597 FOUND" >&2'
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)
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with subtest("virus scan email"):
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client.succeed(
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'msmtp -a user2 user1\@example.com < /etc/root/virus-email 2>&1 | tee /dev/stderr | grep "server message: 554 5\\.7\\.1" >&2'
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)
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server.succeed("journalctl -u rspamd | grep -i eicar")
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# give the mail server some time to process the mail
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server.wait_until_fails('[ "$(postqueue -p)" != "Mail queue is empty" ]')
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with subtest("no warnings or errors"):
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server.fail("journalctl -u postfix | grep -i error >&2")
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server.fail("journalctl -u postfix | grep -i warning >&2")
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server.fail("journalctl -u dovecot2 | grep -i error >&2")
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server.fail("journalctl -u dovecot2 | grep -i warning >&2")
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'';
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}
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