---
id: 4579
title: "Have you ever played with Domino?"
source_domain: blog.quarkslab.com
source_url: "https://blog.quarkslab.com/have-you-ever-played-with-domino.html"
published_at: "2013-12-18T23:00:00Z"
tags: ["cryptography", "reverse-engineering", "password-cracking", "ibm", "lotus-domino", "john-the-ripper"]
phying_url: "https://phying.com/item/4579"
lang: en
---

# Have you ever played with Domino?

## Summary

Reverse-engineering IBM Lotus Domino password storage: the user.id file's ciphered 5-byte digest, built from RC2 and SHA-1 through a custom scheme, and a John the Ripper plugin to brute-force it.

## Intelligence Metadata

- **Sources:** blog.quarkslab.com
- **Published:** 2013-12-18T23:00:00Z
- **Original:** https://blog.quarkslab.com/have-you-ever-played-with-domino.html
- **Phying News:** https://phying.com/item/4579