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Support for algorithm - pdf v1.1 - 1.3 owner password #929

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modelkayak opened this Issue Dec 23, 2016 · 4 comments

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modelkayak commented Dec 23, 2016

Currently Hashcat (3.10) supports the user password, but does not support the owner password. Can we add support to handle the owner password too?

Owner password can be used to lock down permissions, preventing printing/changing.

PDF info:

@philsmd

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philsmd Jan 27, 2017

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for you interest, I confirmed here: https://hashcat.net/forum/thread-6233-post-33255.html#pid33255 that the algorithms used for owner password vs user password are just slightly different (the example was with revision 3 PDF 1.4 - 1.6).
Unfortunately we probably have to do it for each and every PDF revision (+ write parser + new hash modes + kernels etc).... furthermore there is very little requests for this type of password recovery (probably because most of the users just simply work around the permission control of PDF and do not care about the owners password).
Well, if you still think it is worth the effort, you should give at least some thumbs up on this issue and we will rethink if we should implement it ;)

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philsmd commented Jan 27, 2017

for you interest, I confirmed here: https://hashcat.net/forum/thread-6233-post-33255.html#pid33255 that the algorithms used for owner password vs user password are just slightly different (the example was with revision 3 PDF 1.4 - 1.6).
Unfortunately we probably have to do it for each and every PDF revision (+ write parser + new hash modes + kernels etc).... furthermore there is very little requests for this type of password recovery (probably because most of the users just simply work around the permission control of PDF and do not care about the owners password).
Well, if you still think it is worth the effort, you should give at least some thumbs up on this issue and we will rethink if we should implement it ;)

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roycewilliams Jan 27, 2017

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I've added a thumbs up, but I have no real understanding of the level of effort required.

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roycewilliams commented Jan 27, 2017

I've added a thumbs up, but I have no real understanding of the level of effort required.

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Bobbingbob Mar 21, 2017

I too would love to see PDF owner password handling implemented.

Bobbingbob commented Mar 21, 2017

I too would love to see PDF owner password handling implemented.

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maxdestructo May 17, 2017

Just signed up to give a thumbs up. Please add pdf owner passwords to hashcat!

maxdestructo commented May 17, 2017

Just signed up to give a thumbs up. Please add pdf owner passwords to hashcat!

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