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From István Viczián <viczian.ist...@gmail.com>
Subject Re: PDF sign and timestamp
Date Fri, 27 Dec 2013 20:55:15 GMT
Hi,

> I would like to port your code to the pdfbox examples. So it will be an
> official example for other pdfbox users. Did something from your side speak
> against it?

My pleasure!

>>> Only one problem left:
>>> - My document is signed, but not certificated. How can I set the
>>> certification level? (Equivalent to
>>>
>>> appearance.setCertificationLevel(PdfSignatureAppearance.CERTIFIED_NO_CHANGES_ALLOWED);
>>> in iText)
>
>
> I don't figure this out at the moment. Maybe this setting need to be done in
> the appearance dictionary.
>
> Did you maybe have an example document created with iText that containing
> such a property?
>

Example document with iText:
https://dl.dropboxusercontent.com/u/7683931/jtechlog/jtechlog_signed_itext.pdf
With PDFBox:
https://dl.dropboxusercontent.com/u/7683931/jtechlog/jtechlog_signed_pdfbox.pdf

See the difference in the header of the Acrobat Reader:

https://dl.dropboxusercontent.com/u/7683931/jtechlog/jtechlog-signed-difference.png

The source is here with iText:
https://github.com/vicziani/jtechlog-signpdf/blob/master/jtechlog-signpdf-itext/src/main/java/jtechlog/signpdf/PdfSigner.java

Thank you!

Istvan

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