[jira] [Updated] (PDFBOX-2679) Blank page rendered with wrong xref start objid

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

     [ https://issues.apache.org/jira/browse/PDFBOX-2679?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tilman Hausherr updated PDFBOX-2679:
------------------------------------
    Attachment: PDFBOX-2679.patch

"nightly" patch that allows the render the file. Not much tested, and won't commit without 2nd opinion.

> Blank page rendered with wrong xref start objid
> -----------------------------------------------
>
>                 Key: PDFBOX-2679
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-2679
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Parsing
>    Affects Versions: 2.0.0
>            Reporter: Tilman Hausherr
>         Attachments: PDFBOX-2679.patch
>
>
> From Kevin M. on the users mailing list:
> A confidential file doesn't display its image because the objid is unaccessible, due to a malformed xref table:
> {code}
> xref
> 1 7
> 0000000000 65535 f
> 0000000009 00000 n
> 0000358745 00000 n
> 0000358842 00000 n
> 0000359029 00000 n
> 0000359087 00000 n
> 0000359138 00000 n
> trailer 
> {code}
> The first number (1) means the number of the first object. So it would be 1. The second number(7) is the size of the table. The number 1 is incorrect, it should be 0, because "0000000000 65535 f" is the dummy object 0.
> From the pdf spec:
> {quote}The free entries in the cross-reference table form a linked list, with each free entry containing the object number of the next. The first entry in the table (object number 0) is always free and has a generation number of 65,535; it is the head of the linked list of free objects {quote}
> The error messages are:
> Can't find the object 7 0 (origin offset 359138) 
>  Missing XObject: Im1   (Im1 is the object at 7 0, and is the missing image)



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