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Date: Thu, 24 Jan 2013 16:49:20 +0100
From: Frank Dittrich <frank_dittrich@...mail.com>
To: john-dev@...ts.openwall.com
Subject: Re: PDF format incompatibility (jumbo-7 vs. jumbo-8)

On 01/24/2013 04:30 PM, Dhiru Kholia wrote:
> On Thu, Jan 24, 2013 at 8:53 PM, Frank Dittrich
> <frank_dittrich@...mail.com> wrote:
>> On 01/24/2013 03:27 PM, Dhiru Kholia wrote:
>>> A simple (but probably unpopular) fix is to reject old-style hashes.
>>
>> I am sure Solar wouldn't call breaking backwards compatibility a fix.
> 
> I was not careful enough to maintain backwards compatibility when I
> wrote the new pdf format.

OK, but the "$pdf$Standard*" hash should contain all the information
required to construct the hash format which is expected by the jumbo-8
valid(), no?
If all information is there, it should be possible to write a prepare()
function which converts the old-style hash into the new one.

Frank

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