tests: Add ClamAV test and fix errors in virus scanning

.gitattributes

@@ -0,0 +1 @@
+*.cvd filter=lfs diff=lfs merge=lfs -text

.travis.yml

@@ -5,3 +5,4 @@ env:
 script:
     - nix-build tests/intern.nix
     - nix-build tests/extern.nix
+    - nix-build tests/clamav.nix

mail-server/rmilter.nix

@@ -23,7 +23,7 @@ let
            then
            ''
              clamav {
-               servers = /var/run/clamav/clamd.ctl;
+               servers = /run/clamav/clamd.ctl;
              };
            ''
            else "";

mail-server/systemd.nix

@@ -102,8 +102,8 @@ in
     };
 
     systemd.services.rmilter = {
-      requires = [ "rmilter.socket" ];
-      after = [ "rmilter.socket" ];
+      requires = [ "rmilter.socket" ] ++ (lib.optional cfg.virusScanning "clamav-daemon.service");
+      after = [ "rmilter.socket" ] ++ (lib.optional cfg.virusScanning "clamav-daemon.service");
     };
   };
 }

tests/clamav.nix

@@ -0,0 +1,228 @@
+#  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/>
+
+import <nixpkgs/nixos/tests/make-test.nix> {
+
+  nodes = {
+    server = { config, pkgs, lib, ... }:
+      let
+        clamav-db = pkgs.srcOnly {
+          name = "ClamAV-db";
+          src = pkgs.fetchurl {
+            url = "https://files.griff.name/ClamAV-db.tar";
+            sha256 = "eecad99f4c071d216bd91565f84c0d90a1f93e5e3e22d8f3087686ba3bd219e7";
+          };
+        };
+      in
+        {
+            imports = [
+                ../default.nix
+            ];
+
+            virtualisation.memorySize = 1500;
+
+            services.rsyslogd = {
+              enable = true;
+              defaultConfig = ''
+              *.*   /dev/console
+              '';
+            };
+
+            services.clamav.updater.enable = lib.mkForce false;
+            systemd.services.old-clam = {
+              before = [ "clamav-daemon.service" ];
+              requiredBy = [ "clamav-daemon.service" ];
+              description = "ClamAV virus database";
+
+              preStart = ''
+                mkdir -m 0755 -p /var/lib/clamav
+                chown clamav:clamav /var/lib/clamav
+              '';
+
+              script = ''
+                cp ${clamav-db}/bytecode.cvd /var/lib/clamav/
+                cp ${clamav-db}/main.cvd     /var/lib/clamav/
+                cp ${clamav-db}/daily.cvd    /var/lib/clamav/
+                chown clamav:clamav /var/lib/clamav/*
+              '';
+
+              serviceConfig = {
+                Type = "oneshot";
+                PrivateTmp = "yes";
+                PrivateDevices = "yes";
+              };
+            };
+
+            mailserver = {
+              enable = true;
+              debug = true;
+              fqdn = "mail.example.com";
+              domains = [ "example.com" "example2.com" ];
+              dhParamBitLength = 512;
+              virusScanning = true;
+
+              loginAccounts = {
+                  "user1@example.com" = {
+                      hashedPassword = "$6$/z4n8AQl6K$kiOkBTWlZfBd7PvF5GsJ8PmPgdZsFGN1jPGZufxxr60PoR0oUsrvzm2oQiflyz5ir9fFJ.d/zKm/NgLXNUsNX/";
+                      aliases = [ "postmaster@example.com" ];
+                      catchAll = [ "example.com" ];
+                  };
+                  "user@example2.com" = {
+                      hashedPassword = "$6$u61JrAtuI0a$nGEEfTP5.eefxoScUGVG/Tl0alqla2aGax4oTd85v3j3xSmhv/02gNfSemv/aaMinlv9j/ZABosVKBrRvN5Qv0";
+                  };
+              };
+              enableImap = true;
+            };
+
+            environment.etc = {
+              "root/eicar.com.txt".text = "X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*";
+            };
+        };
+      client = { nodes, config, pkgs, ... }: let
+        serverIP = nodes.server.config.networking.primaryIPAddress;
+        clientIP = nodes.client.config.networking.primaryIPAddress;
+        grep-ip = pkgs.writeScriptBin "grep-ip" ''
+          #!${pkgs.stdenv.shell}
+          echo grep '${clientIP}' "$@" >&2
+          exec grep '${clientIP}' "$@"
+        '';
+      in {
+        environment.systemPackages = with pkgs; [
+          fetchmail msmtp procmail findutils grep-ip
+        ];
+        environment.etc = {
+          "root/.fetchmailrc" = {
+            text = ''
+                poll ${serverIP} with proto IMAP
+                user 'user1@example.com' there with password 'user1' is 'root' here
+                mda procmail
+            '';
+            mode = "0700";
+          };
+          "root/.procmailrc" = {
+            text = "DEFAULT=$HOME/mail";
+          };
+          "root/.msmtprc" = {
+            text = ''
+              account        test2
+              host           ${serverIP}
+              port           587
+              from           user@example2.com
+              user           user@example2.com
+              password       user2
+            '';
+          };
+          "root/virus-email".text = ''
+            From: User2 <user@example2.com>
+            Content-Type: multipart/mixed;
+              boundary="Apple-Mail=_2689C63E-FD18-4E4D-8822-54797BDA9607"
+            Mime-Version: 1.0 (Mac OS X Mail 11.3 \(3445.6.18\))
+            Subject: Testy McTest
+            Message-Id: <94550DD9-1FF1-4ED1-9F09-8812FF2E59AA@example.com>
+            Date: Sat, 12 May 2018 14:15:44 +0200
+            To: User1 <user1@example.com>
+            X-Mailer: Apple Mail (2.3445.6.18)
+
+
+            --Apple-Mail=_2689C63E-FD18-4E4D-8822-54797BDA9607
+            Content-Transfer-Encoding: 7bit
+            Content-Type: text/plain;
+              charset=us-ascii
+
+            Hello
+
+            I have attached a dangerous virus.
+
+            Mfg.
+            User2
+
+
+            --Apple-Mail=_2689C63E-FD18-4E4D-8822-54797BDA9607
+            Content-Disposition: attachment;
+              filename=eicar.com.txt
+            Content-Type: text/plain;
+              x-unix-mode=0644;
+              name="eicar.com.txt"
+            Content-Transfer-Encoding: 7bit
+
+            X5O!P%@AP[4\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*
+            --Apple-Mail=_2689C63E-FD18-4E4D-8822-54797BDA9607--
+          '';
+          "root/email2".text = ''
+            From: User <user@example2.com>
+            To: User1 <user1@example.com>
+            Cc:
+            Bcc:
+            Subject: This is a test Email from user@example2.com to user1
+            Reply-To:
+
+            Hello User1,
+
+            how are you doing today?
+
+            XOXO User1
+          '';
+        };
+      };
+    };
+
+  testScript =
+      ''
+      startAll;
+
+      $server->waitForUnit("multi-user.target");
+      $client->waitForUnit("multi-user.target");
+
+      $client->execute("cp -p /etc/root/.* ~/");
+      $client->succeed("mkdir -p ~/mail");
+      $client->succeed("ls -la ~/ >&2");
+      $client->succeed("cat ~/.fetchmailrc >&2");
+      $client->succeed("cat ~/.procmailrc >&2");
+      $client->succeed("cat ~/.msmtprc >&2");
+
+      # fetchmail returns EXIT_CODE 1 when no new mail
+      $client->succeed("fetchmail -v || [ \$? -eq 1 ] >&2");
+
+      # Verify that mail can be sent and received before testing virus scanner
+      $client->execute("rm ~/mail/*");
+      $client->succeed("msmtp -a test2 --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/email2 >&2");
+      # give the mail server some time to process the mail
+      $server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
+      $client->execute("rm ~/mail/*");
+      # fetchmail returns EXIT_CODE 0 when it retrieves mail
+      $client->succeed("fetchmail -v >&2");
+      $client->execute("rm ~/mail/*");
+
+
+      subtest "virus scan file", sub {
+        $server->fail("clamscan --follow-file-symlinks=2 -r /etc/root/ >&2");
+      };
+
+      subtest "virus scanner", sub {
+          $client->fail("msmtp -a test2 --tls=on --tls-certcheck=off --auth=on user1\@example.com < /etc/root/virus-email >&2");
+          # give the mail server some time to process the mail
+          $server->waitUntilFails('[ "$(postqueue -p)" != "Mail queue is empty" ]');
+      };
+
+      subtest "no warnings or errors", sub {
+          $server->fail("journalctl -u postfix | grep -i error >&2");
+          $server->fail("journalctl -u postfix | grep -i warning >&2");
+          $server->fail("journalctl -u dovecot2 | grep -i error >&2");
+          $server->fail("journalctl -u dovecot2 | grep -i warning >&2");
+      };
+
+    '';
+}