538 lines
17 KiB
Nix
538 lines
17 KiB
Nix
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{ config, lib, pkgs, ... }:
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let
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cfg = config.services.parsedmarc;
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ini = pkgs.formats.ini {};
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in
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{
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options.services.parsedmarc = {
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enable = lib.mkEnableOption ''
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parsedmarc, a DMARC report monitoring service
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'';
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provision = {
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localMail = {
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enable = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Whether Postfix and Dovecot should be set up to receive
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mail locally. parsedmarc will be configured to watch the
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local inbox as the automatically created user specified in
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<xref linkend="opt-services.parsedmarc.provision.localMail.recipientName" />
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'';
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};
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recipientName = lib.mkOption {
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type = lib.types.str;
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default = "dmarc";
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description = ''
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The DMARC mail recipient name, i.e. the name part of the
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email address which receives DMARC reports.
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A local user with this name will be set up and assigned a
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randomized password on service start.
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'';
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};
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hostname = lib.mkOption {
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type = lib.types.str;
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default = config.networking.fqdn;
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defaultText = "config.networking.fqdn";
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example = "monitoring.example.com";
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description = ''
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The hostname to use when configuring Postfix.
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Should correspond to the host's fully qualified domain
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name and the domain part of the email address which
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receives DMARC reports. You also have to set up an MX record
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pointing to this domain name.
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'';
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};
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};
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geoIp = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Whether to enable and configure the <link
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linkend="opt-services.geoipupdate.enable">geoipupdate</link>
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service to automatically fetch GeoIP databases. Not crucial,
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but recommended for full functionality.
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To finish the setup, you need to manually set the <xref
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linkend="opt-services.geoipupdate.settings.AccountID" /> and
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<xref linkend="opt-services.geoipupdate.settings.LicenseKey" />
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options.
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'';
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};
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elasticsearch = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Whether to set up and use a local instance of Elasticsearch.
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'';
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};
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grafana = {
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datasource = lib.mkOption {
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type = lib.types.bool;
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default = cfg.provision.elasticsearch && config.services.grafana.enable;
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apply = x: x && cfg.provision.elasticsearch;
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description = ''
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Whether the automatically provisioned Elasticsearch
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instance should be added as a grafana datasource. Has no
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effect unless
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<xref linkend="opt-services.parsedmarc.provision.elasticsearch" />
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is also enabled.
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'';
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};
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dashboard = lib.mkOption {
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type = lib.types.bool;
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default = config.services.grafana.enable;
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description = ''
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Whether the official parsedmarc grafana dashboard should
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be provisioned to the local grafana instance.
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'';
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};
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};
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};
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settings = lib.mkOption {
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description = ''
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Configuration parameters to set in
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<filename>parsedmarc.ini</filename>. For a full list of
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available parameters, see
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<link xlink:href="https://domainaware.github.io/parsedmarc/#configuration-file" />.
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'';
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type = lib.types.submodule {
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freeformType = ini.type;
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options = {
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general = {
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save_aggregate = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Save aggregate report data to Elasticsearch and/or Splunk.
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'';
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};
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save_forensic = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Save forensic report data to Elasticsearch and/or Splunk.
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'';
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};
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};
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imap = {
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host = lib.mkOption {
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type = lib.types.str;
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default = "localhost";
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description = ''
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The IMAP server hostname or IP address.
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'';
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};
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port = lib.mkOption {
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type = lib.types.port;
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default = 993;
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description = ''
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The IMAP server port.
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'';
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};
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ssl = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Use an encrypted SSL/TLS connection.
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'';
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};
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user = lib.mkOption {
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type = with lib.types; nullOr str;
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default = null;
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description = ''
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The IMAP server username.
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'';
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};
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password = lib.mkOption {
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type = with lib.types; nullOr path;
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default = null;
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description = ''
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The path to a file containing the IMAP server password.
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'';
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};
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watch = lib.mkOption {
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type = lib.types.bool;
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default = true;
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description = ''
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Use the IMAP IDLE command to process messages as they arrive.
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'';
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};
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delete = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Delete messages after processing them, instead of archiving them.
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'';
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};
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};
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smtp = {
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host = lib.mkOption {
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type = with lib.types; nullOr str;
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default = null;
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description = ''
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The SMTP server hostname or IP address.
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'';
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};
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port = lib.mkOption {
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type = with lib.types; nullOr port;
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default = null;
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description = ''
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The SMTP server port.
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'';
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};
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ssl = lib.mkOption {
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type = with lib.types; nullOr bool;
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default = null;
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description = ''
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Use an encrypted SSL/TLS connection.
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'';
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};
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user = lib.mkOption {
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type = with lib.types; nullOr str;
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default = null;
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description = ''
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The SMTP server username.
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'';
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};
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password = lib.mkOption {
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type = with lib.types; nullOr path;
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default = null;
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description = ''
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The path to a file containing the SMTP server password.
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'';
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};
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from = lib.mkOption {
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type = with lib.types; nullOr str;
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default = null;
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description = ''
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The <literal>From</literal> address to use for the
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outgoing mail.
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'';
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};
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to = lib.mkOption {
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type = with lib.types; nullOr (listOf str);
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default = null;
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description = ''
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The addresses to send outgoing mail to.
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'';
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};
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};
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elasticsearch = {
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hosts = lib.mkOption {
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default = [];
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type = with lib.types; listOf str;
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apply = x: if x == [] then null else lib.concatStringsSep "," x;
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description = ''
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A list of Elasticsearch hosts to push parsed reports
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to.
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'';
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};
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user = lib.mkOption {
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type = with lib.types; nullOr str;
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default = null;
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description = ''
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Username to use when connecting to Elasticsearch, if
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required.
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'';
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};
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password = lib.mkOption {
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type = with lib.types; nullOr path;
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default = null;
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description = ''
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The path to a file containing the password to use when
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connecting to Elasticsearch, if required.
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'';
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};
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ssl = lib.mkOption {
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type = lib.types.bool;
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default = false;
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description = ''
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Whether to use an encrypted SSL/TLS connection.
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'';
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};
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cert_path = lib.mkOption {
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type = lib.types.path;
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default = "/etc/ssl/certs/ca-certificates.crt";
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description = ''
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The path to a TLS certificate bundle used to verify
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the server's certificate.
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'';
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};
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};
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kafka = {
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hosts = lib.mkOption {
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default = [];
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type = with lib.types; listOf str;
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apply = x: if x == [] then null else lib.concatStringsSep "," x;
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description = ''
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A list of Apache Kafka hosts to publish parsed reports
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to.
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'';
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};
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user = lib.mkOption {
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type = with lib.types; nullOr str;
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default = null;
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description = ''
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Username to use when connecting to Kafka, if
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required.
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'';
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};
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password = lib.mkOption {
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type = with lib.types; nullOr path;
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default = null;
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description = ''
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The path to a file containing the password to use when
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connecting to Kafka, if required.
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'';
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};
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ssl = lib.mkOption {
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type = with lib.types; nullOr bool;
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default = null;
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description = ''
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Whether to use an encrypted SSL/TLS connection.
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'';
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};
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aggregate_topic = lib.mkOption {
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type = with lib.types; nullOr str;
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default = null;
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example = "aggregate";
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description = ''
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The Kafka topic to publish aggregate reports on.
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'';
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};
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forensic_topic = lib.mkOption {
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type = with lib.types; nullOr str;
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default = null;
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example = "forensic";
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description = ''
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The Kafka topic to publish forensic reports on.
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'';
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};
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};
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};
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};
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};
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};
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config = lib.mkIf cfg.enable {
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services.elasticsearch.enable = lib.mkDefault cfg.provision.elasticsearch;
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services.geoipupdate = lib.mkIf cfg.provision.geoIp {
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enable = true;
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settings = {
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EditionIDs = [
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"GeoLite2-ASN"
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"GeoLite2-City"
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"GeoLite2-Country"
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];
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DatabaseDirectory = "/var/lib/GeoIP";
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};
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};
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services.dovecot2 = lib.mkIf cfg.provision.localMail.enable {
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enable = true;
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protocols = [ "imap" ];
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};
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services.postfix = lib.mkIf cfg.provision.localMail.enable {
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enable = true;
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origin = cfg.provision.localMail.hostname;
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config = {
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myhostname = cfg.provision.localMail.hostname;
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mydestination = cfg.provision.localMail.hostname;
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};
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};
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services.grafana = {
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declarativePlugins = with pkgs.grafanaPlugins;
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lib.mkIf cfg.provision.grafana.dashboard [
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grafana-worldmap-panel
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grafana-piechart-panel
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];
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provision = {
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enable = cfg.provision.grafana.datasource || cfg.provision.grafana.dashboard;
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datasources =
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let
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pkgVer = lib.getVersion config.services.elasticsearch.package;
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esVersion =
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if lib.versionOlder pkgVer "7" then
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"60"
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else if lib.versionOlder pkgVer "8" then
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"70"
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else
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throw "When provisioning parsedmarc grafana datasources: unknown Elasticsearch version.";
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in
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lib.mkIf cfg.provision.grafana.datasource [
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{
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name = "dmarc-ag";
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type = "elasticsearch";
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access = "proxy";
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url = "localhost:9200";
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jsonData = {
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timeField = "date_range";
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inherit esVersion;
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};
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}
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{
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name = "dmarc-fo";
|
||
|
|
type = "elasticsearch";
|
||
|
|
access = "proxy";
|
||
|
|
url = "localhost:9200";
|
||
|
|
jsonData = {
|
||
|
|
timeField = "date_range";
|
||
|
|
inherit esVersion;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
];
|
||
|
|
dashboards = lib.mkIf cfg.provision.grafana.dashboard [{
|
||
|
|
name = "parsedmarc";
|
||
|
|
options.path = "${pkgs.python3Packages.parsedmarc.dashboard}";
|
||
|
|
}];
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
services.parsedmarc.settings = lib.mkMerge [
|
||
|
|
(lib.mkIf cfg.provision.elasticsearch {
|
||
|
|
elasticsearch = {
|
||
|
|
hosts = [ "localhost:9200" ];
|
||
|
|
ssl = false;
|
||
|
|
};
|
||
|
|
})
|
||
|
|
(lib.mkIf cfg.provision.localMail.enable {
|
||
|
|
imap = {
|
||
|
|
host = "localhost";
|
||
|
|
port = 143;
|
||
|
|
ssl = false;
|
||
|
|
user = cfg.provision.localMail.recipientName;
|
||
|
|
password = "${pkgs.writeText "imap-password" "@imap-password@"}";
|
||
|
|
watch = true;
|
||
|
|
};
|
||
|
|
})
|
||
|
|
];
|
||
|
|
|
||
|
|
systemd.services.parsedmarc =
|
||
|
|
let
|
||
|
|
# Remove any empty attributes from the config, i.e. empty
|
||
|
|
# lists, empty attrsets and null. This makes it possible to
|
||
|
|
# list interesting options in `settings` without them always
|
||
|
|
# ending up in the resulting config.
|
||
|
|
filteredConfig = lib.converge (lib.filterAttrsRecursive (_: v: ! builtins.elem v [ null [] {} ])) cfg.settings;
|
||
|
|
parsedmarcConfig = ini.generate "parsedmarc.ini" filteredConfig;
|
||
|
|
mkSecretReplacement = file:
|
||
|
|
lib.optionalString (file != null) ''
|
||
|
|
replace-secret '${file}' '${file}' /run/parsedmarc/parsedmarc.ini
|
||
|
|
'';
|
||
|
|
in
|
||
|
|
{
|
||
|
|
wantedBy = [ "multi-user.target" ];
|
||
|
|
after = [ "postfix.service" "dovecot2.service" "elasticsearch.service" ];
|
||
|
|
path = with pkgs; [ replace-secret openssl shadow ];
|
||
|
|
serviceConfig = {
|
||
|
|
ExecStartPre = let
|
||
|
|
startPreFullPrivileges = ''
|
||
|
|
set -o errexit -o pipefail -o nounset -o errtrace
|
||
|
|
shopt -s inherit_errexit
|
||
|
|
|
||
|
|
umask u=rwx,g=,o=
|
||
|
|
cp ${parsedmarcConfig} /run/parsedmarc/parsedmarc.ini
|
||
|
|
chown parsedmarc:parsedmarc /run/parsedmarc/parsedmarc.ini
|
||
|
|
${mkSecretReplacement cfg.settings.smtp.password}
|
||
|
|
${mkSecretReplacement cfg.settings.imap.password}
|
||
|
|
${mkSecretReplacement cfg.settings.elasticsearch.password}
|
||
|
|
${mkSecretReplacement cfg.settings.kafka.password}
|
||
|
|
'' + lib.optionalString cfg.provision.localMail.enable ''
|
||
|
|
openssl rand -hex 64 >/run/parsedmarc/dmarc_user_passwd
|
||
|
|
replace-secret '@imap-password@' '/run/parsedmarc/dmarc_user_passwd' /run/parsedmarc/parsedmarc.ini
|
||
|
|
echo "Setting new randomized password for user '${cfg.provision.localMail.recipientName}'."
|
||
|
|
cat <(echo -n "${cfg.provision.localMail.recipientName}:") /run/parsedmarc/dmarc_user_passwd | chpasswd
|
||
|
|
'';
|
||
|
|
in
|
||
|
|
"+${pkgs.writeShellScript "parsedmarc-start-pre-full-privileges" startPreFullPrivileges}";
|
||
|
|
Type = "simple";
|
||
|
|
User = "parsedmarc";
|
||
|
|
Group = "parsedmarc";
|
||
|
|
DynamicUser = true;
|
||
|
|
RuntimeDirectory = "parsedmarc";
|
||
|
|
RuntimeDirectoryMode = 0700;
|
||
|
|
CapabilityBoundingSet = "";
|
||
|
|
PrivateDevices = true;
|
||
|
|
PrivateMounts = true;
|
||
|
|
PrivateUsers = true;
|
||
|
|
ProtectClock = true;
|
||
|
|
ProtectControlGroups = true;
|
||
|
|
ProtectHome = true;
|
||
|
|
ProtectHostname = true;
|
||
|
|
ProtectKernelLogs = true;
|
||
|
|
ProtectKernelModules = true;
|
||
|
|
ProtectKernelTunables = true;
|
||
|
|
ProtectProc = "invisible";
|
||
|
|
ProcSubset = "pid";
|
||
|
|
SystemCallFilter = [ "@system-service" "~@privileged" "~@resources" ];
|
||
|
|
RestrictAddressFamilies = [ "AF_UNIX" "AF_INET" "AF_INET6" ];
|
||
|
|
RestrictRealtime = true;
|
||
|
|
RestrictNamespaces = true;
|
||
|
|
MemoryDenyWriteExecute = true;
|
||
|
|
LockPersonality = true;
|
||
|
|
SystemCallArchitectures = "native";
|
||
|
|
ExecStart = "${pkgs.python3Packages.parsedmarc}/bin/parsedmarc -c /run/parsedmarc/parsedmarc.ini";
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
users.users.${cfg.provision.localMail.recipientName} = lib.mkIf cfg.provision.localMail.enable {
|
||
|
|
isNormalUser = true;
|
||
|
|
description = "DMARC mail recipient";
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
# Don't edit the docbook xml directly, edit the md and generate it:
|
||
|
|
# `pandoc parsedmarc.md -t docbook --top-level-division=chapter --extract-media=media -f markdown+smart > parsedmarc.xml`
|
||
|
|
meta.doc = ./parsedmarc.xml;
|
||
|
|
meta.maintainers = [ lib.maintainers.talyz ];
|
||
|
|
}
|