Michele Balistreri created PDFBOX-2269:
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             Summary: Support for AES-256 Rev. 5 Decryption (Acrobat 9)
                 Key: PDFBOX-2269
                 URL: https://issues.apache.org/jira/browse/PDFBOX-2269
             Project: PDFBox
          Issue Type: Improvement
            Reporter: Michele Balistreri
         Attachments: AES-256_Rev5.diff

This patch adds support for decrypting files using the (deprecated) AES-256 
scheme revision 5. The current version only support revision 6. Since revision 
5 files are generated by Acrobat 9, there is a relatively large amount of them 
in the wild so support is needed.

This patch includes also the fixes from PDFBOX-2286



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