[jira] Resolved: (PDFBOX-907) Encrypted Key not correctly calculated when the meta data is not encrypted

["Andreas Lehmkühler (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PDFBOX-907?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andreas Lehmkühler resolved PDFBOX-907.
---------------------------------------

       Resolution: Fixed
    Fix Version/s: 1.4.0
         Assignee: Andreas Lehmkühler

I added the patch in revision 1041553 as proposed.

Thanks for the contribution

> Encrypted Key not correctly calculated when the meta data is not encrypted
> --------------------------------------------------------------------------
>
>                 Key: PDFBOX-907
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-907
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Parsing
>    Affects Versions: 1.3.1
>            Reporter: Martijn Brinkers
>            Assignee: Andreas Lehmkühler
>             Fix For: 1.4.0
>
>         Attachments: MBTA_Review_2009.pdf, PDFBOX-907.patch
>
>
> Since rev 4, meta data can be unencrypted while the data is encrypted. If the metadata is not encrypted 0xFFFFFFFF should be added to the hash:
> "Security handlers of revision 4 or greater) If document metadata is not being encrypted, pass 4 bytes with
> the value 0xFFFFFFFF to the MD5 hash function."
> (see see 7.6.3.3 Algorithm 2 Step f of PDF 32000-1:2008)
> Whether or not the metadata is encrypted is store in the encryption dictionary. The default value is to encrypt the meta data.
> I will attach a patch to detect whether the meta data is encrypted, and if not 0xFFFFFFFF will be added.
> The document that I have tested with can be downloaded from http://www.mbtareview.com/MBTA_Review_2009.pdf

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