From: Brian Candler <b.candler@...>
Date: 2009-02-23T22:25:57+09:00
Subject: Re: encryption using ruby

Please see my answer at http://www.ruby-forum.com/topic/178721 where 
exactly the same question was answered, but the OP didn't bother to 
reply.

Here you have posted a bit more code. This shows that no decryption is 
taking place at all; rather, the Perl is trying all possible PINs until 
it stumbles on the correct one (AKA a "brute-force attack")

Anyway, you just need to look at either the documentation for the perl 
Crypt::Encrypt function you are using to find out what sort of hashing 
it is doing, or probably easier, look at the Perl source and 
re-implement in Ruby.
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