Rafael Gomez created PDFBOX-3011:
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Summary: Find out why trunk CreateVisibleSignature example
produces incorrect output pdf
Key: PDFBOX-3011
URL: https://issues.apache.org/jira/browse/PDFBOX-3011
Project: PDFBox
Issue Type: Task
Components: Signing
Affects Versions: 2.0.0
Environment: OS X Yosemite on MBP 2,6 GHz Intel Core i7, 16 GB 1600
Mhz DDR3
java version "1.7.0_45"
Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
Reporter: Rafael Gomez
Priority: Trivial
Fix For: 2.0.0
To evaluate Apache's PDFBox library, I created a simple sample based on trunk
CreateVisibleSignature and CreateSignature. The reason for combining those 2
samples was that each provided features that I wanted to test. The created
"mix" example is in SignPDFPoC.java.
The initial problem I faced is related to the sentence closing the
SignatureOptions right before calling saveIncremental on the relevant document
object. Once I moved the 'options.close()' sentence to a better position,
SignPDFPoC started to produce correct output, signed, pdf files. And once I
added my test certificate chain to the trusted identities, the signature
validates correctly.
After examining the produced, signed, pdf, both via Signature Panel on Adobe
Reader and via the file itself (binary), I got stuck on "Field: Signature1". I
initially supposed that PDVisibleSignDesigner.signatureFieldName was used for
that purpose. But it does not seem to be the case. Moreover, for invisible
signatures, no PDVisibleSignDesigner is used, so there must be a different way.
So I decided to build and execute the original CreateVisibleSignature from
trunk to check whether it did something different regarding "Field: Signature1"
that I could have missed in my "mix" example. This is how I found out that the
trunk CreateVisibleSignature example produces incorrect pdf files. Or I must be
doing something terribly wrong that, in advanced, I apologize for.
I attach complete zip files for reproducing the observation:
- mix_example_correct_signed_pdf
- trunk_createvisiblesignature_example_incorrect_signed_pdf
Simply add the .zip suffix, unpack and run the corresponding _execute.sh
script. There are already .class files available. The needed dependencies are
also present. As test p12 containing a certificate chain, test pdf file and
test image.
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