dmarc-report-converter

Convert DMARC report files from xml to human-readable formats. Files can be located on a local filesystem or on an IMAP server.

Example of html_static output:

Support input formats:

• .xml file: dmarc report in xml format

• .gz file: gzipped dmarc report in xml format

• .zip file: zipped dmarc report in xml format

• .eml file: an electronic mail format or email saved in plain text - dovecot-report-converter tries to extract .xml, .gz or .zip attachments from found eml files to input.dir

Support output formats:

• html_static output file is a HTML, generated from builtin template htmlStaticTmpl (consts.go). This format uses bootstrap hosted on bootstrapcdn, so you don't need to configure self-hosted bootsrap assets.

• html output file is a HTML, generated from builtin template htmlTmpl (consts.go ). This format uses self-hosted bootsrap and javascript assets, so you need to configure your web server and output -> assets_path option.

• txt output file is the plain text, generated from builtin template txtTmpl (consts.go).

• json output file is the json, represents dmarc.Report struct.

• external_template output file generated from external template file. Path to this file must be set with output -> external_template option. Builtin template txtTmpl (consts.go) can be used as example.

Installation

1. Get installation archive. There are two ways: download pre-built archive from github releases page or build from sources

2. Unpack to destination directory, for example to "/opt":

   sudo tar -xvf dmarc-report-converter*.tar.gz -C /opt

3. Copy example config file and edit:

   cd /opt/dmarc-report-converter/
   sudo cp config.dist.yaml config.yaml
   sudo nano config.yaml

4. If you want to use "html" output, you have to configure your web server to serve assets directory and change assets_path in configuration file. Example for nginx:

   sudo cp -r assets /usr/share/nginx/html

   config.yaml:

   output:
     assets_path: "/dmarc/assets"

   location configuration:

   location /dmarc/ {
       root /usr/share/nginx/html;
       autoindex           on;
       autoindex_localtime on;
   }

   and go to the http://your-web-server/dmarc

docker compose

There is a Docker Compose wrapper created by @nielsbom (thanks!):

https://github.com/nielsbom/dmarc_report_viewer

Nix

There is a Nix package dmarc-report-converter created by @Nebucatnetzer (thanks!):

Configuration

Copy config/config.dist.yaml to config.yaml and change parameters:

• lookup_addr (bool): perform reverse lookup? If enabled, may take some time.

• lookup_limit (int): limit lookup pool size; must be positive; default = 50

• merge_reports (bool): merge multiple similar reports to one?

• merge_key (string): Go template string used to generate a key to merge reports. Only used when merge_reports is enabled. Default is {{ .ReportMetadata.OrgName }}!{{ .ReportMetadata.Email }}!{{ .PolicyPublished.Domain }}.

• log_debug (bool): print debug log messages?

• log_datetime (bool): add datetime to log messages?

input section:

• dir (str): directory with input files

• delete (bool): delete source files after conversion?

• imap (optional section): dmarc-report-converter can fetch reports from IMAP server and save them to input -> dir before conversion started. To achieve this, configure this subsection.

  • server, username, password, mailbox (str): IMAP server address, credentials and mailbox name

  • delete (bool): delete email messages from IMAP server if reports are fetched successfully

  • debug (bool): print debug messages during IMAP session?

  • security (str): select encryption between "tls" (default), "starttls" or "plaintext"

output section:

• file (str): output file, should be string or golang template. If value is empty string "" or "stdout", print result to stdout. Inside golang template any field from dmarc.Report struct can be used, or shortcuts .ID, .TodayID

• format (str): output format (txt, json, html_static, html, external_template)

• assets_path (str, optional for html format): path to assets for html output format.

• external_template (str, mandatory for external_template format): path to external template file

Templates

External templates can reference to dmarc.Report struct as . (dot, see consts.go for example).

Additional functions can be used:

• now "2006-2-1" returns current date and time, first argument is the golang time format.

Daily reports

If you want to convert reports daily:

• Set input -> delete: yes and input -> imap -> delete: yes, because all old reports should be deleted from the source

• Set merge_reports: no (do not merge any reports, use as-is)

• Execute dmarc-report-converter every day (add daily crontab job or systemd timer):

  sudo cp install/dmarc-report-converter.sh /etc/cron.daily/

• Use {{ .ID }} or {{ .TodayID }} shortcut in output -> file

Weekly or monthly reports

Many providers send reports to your email address every day. If you want to make weekly or monthly reports:

• Set input -> delete: yes and input -> imap -> delete: yes, because all old reports should be deleted from the source

• Set merge_reports: yes, because all similar reports should be merged

• Execute dmarc-report-converter every week / month (add weekly / monthly crontab job or systemd timer)

• Use {{ .TodayID }} shortcut in output -> file, if you want to create output file with current date in filename (instead of begin report date).

Building from sources

1. Install go compiler and building tools:

   # debian/ubuntu
   sudo apt-get install golang-go make git tar
   
   # centos/fedora, enable epel-release repo first
   sudo yum install epel-release
   sudo yum install golang make git tar

   or follow official instruction

2. Download sources:

   git clone https://github.com/tierpod/dmarc-report-converter.git

3. Build binary and create installation archive:

   cd dmarc-report-converter
   make release

4. Installation archive will be places inside dist directory. Also, if you want to test dmarc-report-converter without installation, you can execute:

   ./bin/dmarc-report-converter -config /path/to/config.yaml

Thanks

• bootstrap
• jquery
• ChartJS
• golang emersion packages (go-imap, go-message, go-sasl, go-textwrapper)

And we have a lot of contributors!