Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.0.0
    • Fix Version/s: 2.0.0
    • Component/s: PDModel
    • Labels:
      None

      Description

      When opening a document encrypted with AES-256 (owner password only) by providing no password, the isUserPassword method fails, since it tries, indirectly, to decrypt a null pointer by calling computeUserPassword. The result of computeUserPassword would be ignored even if the call succeeded, since it is not need for AES-256 encryption.

      Also, the code validating the Perms dictionary is correct, but unfortunately not even Acrobat seems to write Perms correctly (in my case P = F0C0 and Perms = F2C0), so that check needs to be relaxed. Perhaps logging the issue instead of throwing an exception would be more adequate.

      Provided is a patch for both issues. I understand it is probably suboptimal but I am completely new to the project and have not yet had the time to study all coding conventions. Considering the patch is very small maybe someone can take it as a pointer of what needs to be changes.

        Attachments

        1. AES256-fix.diff
          3 kB
          Michele Balistreri

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            • Assignee:
              Unassigned
              Reporter:
              briksoftware Michele Balistreri
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              Dates

              • Created:
                Updated:
                Resolved: