Am 09.02.2017 um 20:10 schrieb Jonathan Barbero:
Hi,
I sign a PDF to a file with *CreateSignature.java* , then I read the
file and save it again.
The final file has the signature corrupted by *Adobe Reader* program.
Yes, of course. The normal save creates a new PDF, where all elements
are newly ordered. Thus the signature is no longer valid.
If you want to make changes to a signed file (which is not really a good
idea, the point of a signature is to show that it hasn't been changed),
then you'd need to use saveIncremental. Which doesn't work on signed
files, see PDFBOX-45, the last few entries.
Tilman
I attached the original, the signed PDF and the same file read and
wrote again.
Also a Java project with a test case to create the files in
"test_data" folder.
https://drive.google.com/file/d/0B_x5-ZgUNfwXc2VydGJkRkVJdFE/view?usp=sharing
Regards
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