dldkey is a tool that shipped with a relatively obscure Linux distribution
in 1993/1994 called Deutsche Linux Distribution (DLD). The utility was used
by the install script to install commercial software. The software was
encrypted and dldkey was used to decrypt the contents of the encrypted
tar.gz file as it installed.
The purpose of this repo is to reverse engineer dldkey and determine the
install key used or write a replacement dldkey utility that doesn't need a
key. The code in this repo may not necessarily be very high quality since we
are attempting to match the original binary (where it makes sense) using
reverse engineering techniques. Since the tool was staticly linked with the C
library at the time, the tool developed here will not be byte for byte
compatible with the original binary.