[Poppler-bugs] [Bug 70704] Password required on document that opens without using Acrobat

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70704

--- Comment #2 from James Cloos <cloos at jhcloos.com> ---
Interesting.

GhostScript also is unable to open it, but mupdf can do so.

The mupdf src has this comment about /R 6:

/*
 * Compute an encryption key (PDF 1.7 ExtensionLevel 8 algorithm)
 *
 * Adobe has not yet released the details, so the algorithm reference is:
 *
http://esec-lab.sogeti.com/post/The-undocumented-password-validation-algorithm-of-Adobe-Reader-X
 */

That will be needed to handle this document.

-JimC

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