[Poppler-bugs] [Bug 24752] Fail to open encrypted PDF, which opens with Acrobat Reader.

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=24752





--- Comment #3 from Brad Hards <bradh at frogmouth.net>  2009-10-31 17:28:12 PST ---
We don't really have documentation at this level. The applicable parts of
poppler are in poppler/poppler/Decrypt.[cc,h] - you should be able to follow it
from there. 

AES in that context is AES128.

The applicable section of the PDF spec is 3.5. You can get the information on
the AES256 variant at:
http://www.adobe.com/devnet/acrobat/pdfs/adobe_supplement_iso32000.pdf

It might help to compare that to the original crypto (RC4, AES128) parts of the
spec, so you can see the code that needs to be changed / added. That is
available from http://www.adobe.com/devnet/acrobat/pdfs/PDF32000_2008.pdf

Good luck!

Brad


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