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Date: Thu, 12 Mar 2020 11:49:55 +0100
From: Solar Designer <>
Subject: Re: What format is used to crack a vBulletin hash with a fixed 30 byte salt?


On Thu, Mar 12, 2020 at 03:10:16AM +0100, magnum wrote:
> $ ./john -list=subformats | grep -i vbulletin
> UserFormat = dynamic_1007  type = dynamic_1007: md5(md5($p).$s) (vBulletin)

> $ ./john --list=subformats | grep -F 'md5(md5($p).$s)'
> Format = dynamic_6   type = dynamic_6: md5(md5($p).$s)
> Format = dynamic_16  type = dynamic_16: md5(md5(md5($p).$s).$s2)
> UserFormat = dynamic_1007  type = dynamic_1007: md5(md5($p).$s) (vBulletin)
> UserFormat = dynamic_2006  type = dynamic_2006: md5(md5($p).$s) (PW > 55 
> bytes)

We should probably change the comment for dynamic_2006 from "PW > 55
bytes" to "vBulletin, PW > 55 bytes or/and salt > 23 bytes)", so that it
would be caught by your first grep and so that its different salt size
limit would be clear from this brief description.

Will you commit that change, please?



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