Re: [Podofo-users] Problem with encrypted PDFs

Ilan Zisser Tue, 20 Jan 2015 06:24:59 -0800

Hi Ismael,

I run across a similar problem. However, it was limited to the 64 bit version (on Windows).
I tracked the problem to an issue with the 64 bit version of openssl.

So, if you're working with a 32 bit version, I can't help much but if you're working on a 64 bit version, I can offer a bypass.

The bypass is a patch to pdfencrypt.cpp. I didn't offer it to the general public because it's ugly.

Ilan

On 20/01/2015 16:16, Ismael Schellemberg wrote:

Hello,

I was wondering if anyone has seen this. I would dearly appreciate some help in this matter.

Ismael

2014-12-17 17:18 GMT-02:00 Ismael Schellemberg <isma...@gmail.com>:

Greetings

I've downloaded the latest PoDoFo (version 0.9.3) and I'm trying to load an encrypted PDF, but I can't seem to get it to work.

Here's what I'm doing:

  try {

PdfMemDocument *doc;

doc = new PdfMemDocument();

try {

doc->Load("/Users/ismael/Downloads/password_Password01.pdf");

} catch (PdfError &error) {

if (error.GetError() == ePdfError_InvalidPassword) {

doc->SetPassword("Password01");

} else {

return false;

}

}

doc->Write("/Users/ismael/Downloads/output_Password01.pdf");

} catch (PdfError &error) {

  return false;

}

doc->Load(...); throws an InvalidPassword error, as expected, but when I do doc->SetPassword(...); it throws an InternalLogic error. Debugging I found that the error comes from PdfEncrypt.cpp.Decrypt(...) here:

status = EVP_DecryptFinal_ex( aes, pBuffer + lOutLen, &lStepOutLen );

if( status != 1 )

      PODOFO_RAISE_ERROR_INFO( ePdfError_InternalLogic, "Error AES-decryption data padding" );

EVP_DecryptFinal_ex returns 0 and then the error is raised. This is happening to me with three different PDF files that were generated in different ways. They work normally on any viewer application, and I'm at a loss as to why this is not working.

Sincerely,

Ismael
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New Year. New Location. New Benefits. New Data Center in Ashburn, VA.
GigeNET is offering a free month of service with a new server in Ashburn.
Choose from 2 high performing configs, both with 100TB of bandwidth.
Higher redundancy.Lower latency.Increased capacity.Completely compliant.
http://p.sf.net/sfu/gigenet

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Re: [Podofo-users] Problem with encrypted PDFs

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