downloadbrowseooze's Haskell Keygenme

Download haskellkgm.zip, 140 kb (password: crackmes.de)
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This keygenme is written in Haskell, a purely functional language.

Task:
° make a valid key OR
° write a keygen that generates a multitude of valid keys for a given name

No bruteforcing needed. The actual algorithm is pretty straightforward. I believe that the difficulty lies in analyzing the code generated by the Glasgow Haskell Compiler (v6.8.1).

The keygenme is a console application that reads name and key from a file called "key.txt" in the current working directory. An example keyfile was included for reference.

Difficulty: 4 - Needs special knowledge
Platform: Windows
Language: Unspecified/other

Published: 07. Aug, 2008
Downloads: 196

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Discussion and comments

ultrasound
13. Aug 2008		Just started out with this sounds interesting.. I always use a bunch of 5s for my dummy serial because it easy to see in memory, but when I use it on this app then its valid for any name!

i.e.
5555-5555-5555-5555
Xspider
13. Aug 2008		:| maybe is a bug!!? :p
Syrius
13. Aug 2008		I think this crackme definently has a bug, 'cause any serial i put in was correct.

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