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https://issues.apache.org/jira/browse/PDFBOX-1513?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andreas Lehmkühler resolved PDFBOX-1513.
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Resolution: Fixed
Fix Version/s: 1.8.0
I added the patch in revision 1451638. I did some reformatting, removed some
methods as discussed and applied some minor changes.
Thanks a lot for the contribution!
> PDF signature improvements
> --------------------------
>
> Key: PDFBOX-1513
> URL: https://issues.apache.org/jira/browse/PDFBOX-1513
> Project: PDFBox
> Issue Type: Improvement
> Components: Parsing, PDFReader, PDModel
> Affects Versions: 1.7.1
> Reporter: Thomas Chojecki
> Assignee: Andreas Lehmkühler
> Priority: Minor
> Fix For: 1.8.0
>
>
> Hallo,
> i have some signing improvements and want to contribute it.
> Changelog:
> - add ability to sign documents with xref streams (big thanks to A. Funk).
> This will significantly improve the signature creation, due to the fact that
> there are more and more documents with xref streams out there.
> - add ability to handle documents with hybrid xref (xref stream and table as
> fallback)
> - parsing incremental updated documents where the offsets of the xref entries
> doesn't match exactly the position of the object. The conflict solver
> tollerate objects that are +- 4 bytes out of the offset.
> - fix COSString parsing if there are malformed chars inside a hex string.
> - removed some confusing logging in the conflict solver
> - add ability to create and sign signature fields.
> - add ability to create pades signature timestamps (PAdES Part4)
> - improved the signature search and added new convenience methods to
> PDDocument.
> - add new methods to the PDSignature object (seed value dict)
> - add examples for signing pdf documents (just basic signatures, i try to add
> some for advanced signing with SignatureOptions and maybe a example for
> visual signing)
> hope i don't forgot something.
> All the changes are made on a pdfbox fork on github. A pull request will
> follow in a moment.
> Best regards
> Thomas
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