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Date: Thu, 24 Jan 2013 19:01:48 +0100
From: Frank Dittrich <>
Subject: Re: PDF format incompatibility (jumbo-7 vs. jumbo-8)

On 01/24/2013 06:01 PM, shane Shane wrote:
>> The other alternative would be to completely drop the new style and just
>> continue to use the old-style format $pdf$Standard, if all hashes
>> supported by the current version could be converted into that format.
> Unfortunately I don't think we could stick with the older format because
> there's no where in it for the OE and UE strings in the later
> PDF specifications.

No problem. If the new canonical hash format is preferable, let's use
this one.

> The think the simplest solution is to validate the older hashes and then
> convert them to the new format. I don't mind writing the code to do it. I'm
> not that familiar with the internals of john but from what I can gather
> from reading the code that uses the prepare method, prepare would be the
> best place to do this. Is it always called before valid?

Yes, you are right. The conversion should be done in prepare.
Prepare will always be called before valid.

It would be great if you could implement this.


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