Hi, I tested with the files we have here that presented the problem and
the signature is now visible on Chrome again :)
Thank you Tillman for the quick response!
Em 27/03/2018 17:43, Tilman Hausherr escreveu:
Hi,
Snapshot available here:
https://repository.apache.org/content/groups/snapshots/org/apache/pdfbox/pdfbox-app/2.0.10-SNAPSHOT/
Please test it and tell whether the problem goes away.
Tilman
Am 26.03.2018 um 13:38 schrieb Gabriel Madeira Pessoa:
Sorry again for incomplete information about the problem.
When I ran the CreateVisibleSignature example I ran it without setting
the Perms dictionary. Without it, the annotation for the visible
signature becomes the object "8 0", the same as xref object from the
previous revision. With Perms "on" they get to be "8 0" and the
annotation goes to a "valid" number and the browser can show it.
Em 23/03/2018 18:12, Tilman Hausherr escreveu:
Am 23.03.2018 um 21:22 schrieb Gabriel Madeira Pessoa:
Sorry I was not very clear.
- iText 7.1.1 included, the code I sent was tested with that
version.
- PDFBOX-3917_signed.pdf
Thanks... both work with edge and with the google drive pdf viewer on
my phone. I used the trunk to create the signatures. Can you display
them?
http://home.snafu.de/tilman/tmp/PDFBOX-3917_signed.pdf
http://home.snafu.de/tilman/tmp/itext-doc_signed.pdf
If no, then the problem is on your side...
If yes, then I should retry with 2.0.9.
Tilman
Em 23/03/2018 16:49, Tilman Hausherr escreveu:
Am 22.03.2018 um 18:58 schrieb Gabriel Madeira Pessoa:
Hello everyone,
While trying to sign PDFs created from many different sources we
found an unusual behavior with files generated with iText (older
versions up until 7.1.1) when they are created with full
compression enabled (that creates the xref table as a stream).
"older versions up until 7.1.1" - do you mean including 7.1.1 or
except 7.1.1 ? Because 7.1.1 is the latest version.
http://mvnrepository.com/artifact/com.itextpdf/itext7-core
iText does not add the the reference for the object of the xref
table inside the own table. That way, when signing with PDFBox
(2.0.7, 2.0.8 and even 2.0.9 that I saw had its tagged created on
github) COSWriter.prepareIncrement does not know that the number
of objects is actually one higher than it had found, so the first
entry on the signature revision has the same number that the xref
table on the previous revision.
With invisible signatures that does not looks like a problem, but
when we have a visible signature, the image does not show in in
Microsoft Edge or Google Chrome.
PDFBox can get the actual highest number on PDFs created with xref
table stream that have its own reference inside.
I'm actually in doubt which on is the correct table, with or
without a reference its own dictionary object.
For a PDF that the table contains the reference we used the one
from PDFBOX-3198 just removing the signature (or use it as it is
on the ticket, because the image shows up on browsers).
PDFBOX-3198 has several PDFs. Which one do you mean?
To create a iText PDF with xref table as stream just run:
WriterProperties properties = new WriterProperties();
properties.setFullCompressionMode(true);
PdfWriter writer = new PdfWriter("doc.pdf", properties);
PdfDocument pdf = new PdfDocument(writer);
Document document = new Document(pdf);
document.add(new Paragraph("Hello World!"));
document.close();
Thank you guys very much.
Ok, I'll test this...
I wonder if your problem is related to
https://issues.apache.org/jira/browse/PDFBOX-3631
Tilman
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Atenciosamente,
Gabriel Pessoa
Analista
BRy Tecnologia
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