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Date: Wed, 31 Oct 2012 01:02:13 +0100
From: magnum <>
Subject: Re: Office <=2003 format

On 07/22/12 13:31, Rich Rumble wrote:
> On Sun, Jul 22, 2012 at 7:06 AM, Dhiru Kholia <> wrote:
>> Rich, Thanks, that password worked.
>> I have named the format "oldoffice". Attaching patch against
>> magnum-jumbo branch. Please test the patch.
>> Usage:
>> 1. Run on Office 97-2003 RC4 encryted documents.
>> 2. Run john on the outpu of
> I'll test now. I provided a lot additional info previously for a
> crypto library M$ provides
> I read all those resources a while ago, I think the library that is
> provided is C# as opposed to C. But there are other useful blog posts
> and insights I think there as well. Would a GPU speed things up? I
> know there are several papers out there about FPGA's being a cheap and
> very fast way to find the keys (not the password), I would think RC4
> is a pretty old/quick one by today's standards.
> -rich

I am considering implementing oldoffice in OpenCL. This will be easy 
enough but I would prefer splitting it into two different formats - one 
for MD5 and another for SHA1. But what would I call them? When did they 
switch to SHA1? It seems all Office 2003 test files are using SHA1.


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