Dne 28.7.2013 19:54, Dominik Seichter napsal(a):
> Thanks for your patch. I committed it to SVN. At least we do not crash
> now anymore.
Hi,
I did some testing and the problem is that PdfEncryptAESV3::Decrypt uses
m_encryptionKey which contains all zeros, but calling
if (ok)
GenerateEncryptionKey("");
in PdfEncryptAESV3::Authenticate() is not enough (even it generates the
same key on a document load), because the decrypt as such fails.
I guess it's due to initialization vectors ('iv' in
PdfEncryptAESBase::AES()), though I'm not able to properly decrypt the
data directly in PdfEncryptAESV3::Encrypt().
I admit I have no idea how AES should work in PDF (and in general too).
pzent, could you follow-up on your commit [1], please? Or maybe Dominik?
Thanks and bye,
zyx
[1] http://sourceforge.net/p/podofo/code/1512/
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