[PDFBOX-4393] PDF signature invalid after second interactive field signed

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.12, 2.0.13
• Fix Version/s: 2.0.14, 3.0.0 PDFBox
• Component/s: Signing
• Environment: Windows
• Assignee: Tilman Hausherr
• Reporter: Martin Klíma
• Created: 04/Dec/18 10:15
• Updated: 28/Feb/19 17:44
• Resolved: 12/Dec/18 09:12

Description

Hi guys,

I stumped on the problem with PDFBox and interactive field signing. I have PDF generated with OpenText StreamServe with two interactive fields for signing. See example 1 (streamserve_test_sig0.pdf) in attachement.

When I use Adobe Reader I can sign both of the visual fields just fine but when I use PDFBox to sign one of this field the following signature is marked as invalid. Doesn't matter if I use PDFbox or sign it manually with Adobe Reader See example 3: 

•  streamserve_test_sig3.pdf (signed by PDFBox) - valid
•  streamserve_test_sig3.signed.pdf (signed 2nd by Adobe Reader) - invalid

 

Also last example - when it´s signed first by Adobe Reader and then with PDFBox the signature seems valid but it says the document was "certified". See example 2 (streamserve_test_sig2.pdf)

 

What could be wrong? When is signed whole document with PDFBox it works just fine.

Thanks for response,

Martin

 

 

 

 

 

 

 

 

 

 

Issue Links

• is related to: PDFBOX-4398 getLastSignatureDictionary modifies internal structure of PDDocument
• relates to: PDFBOX-4303 Helv and ZaDb overridden