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'sigandcertify': True results in invalid signature

See original GitHub issue

Hi, I was having some problems with cms.sign. I tried running the example with my own cert file which resulted in an invalid signature due to changes to the document.

but if I set sigandcertify to False then the signature is perfectly fine:

Is there something I am doing wrong? Or I am not understainding the usage of sigandcertify ?

Thanks a lot

Issue Analytics

State:
Created 3 years ago
Comments:9 (6 by maintainers)

Top GitHub Comments

1reaction

m32commented, Oct 3, 2020

My experience with acrobat reader shows that an invalid file after signing generates strange problems in this program.

Untitled1.pdf is not valid, error (s): 8.1: A Mandatory element is missing, Unable to process an element if it is null. 7.2: Error on MetaData, CreatorTool present in the document catalog dictionary can’t be found in XMP information (Property is not defined) 7.11: Error on MetaData, PDF / A identification schema http://www.aiim.org/pdfa/ns/id/ is missing

0reactions

m32commented, Oct 5, 2020

Both documents signed with the same program but with different certificates, and one is marked as a modified document, and the other only unknown signature value? For me it is definitely not an endesive problem.

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