[jira] [Resolved] (PDFBOX-2268) AES-256 decryptions fails

["Tilman Hausherr (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-2268?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tilman Hausherr resolved PDFBOX-2268.
-------------------------------------

       Resolution: Fixed
    Fix Version/s: 2.0.0

Fixed in PDFBOX-2269.

> AES-256 decryptions fails
> -------------------------
>
>                 Key: PDFBOX-2268
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2268
>             Project: PDFBox
>          Issue Type: Bug
>          Components: PDModel
>    Affects Versions: 2.0.0
>            Reporter: Michele Balistreri
>             Fix For: 2.0.0
>
>         Attachments: AES256-fix.diff
>
>
> 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.



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