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verify the signature in pdf

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A component to control process creation and termination in Windows and .NET applications.
#12344
Posted: 02/09/2010 06:55:43
by Leos Krejci (Standard support level)
Joined: 02/09/2010
Posts: 2

Hello,
when verifying the signature in the PDF file function Validate (TElPDFSignature) for some PDF found a problem with this verification. There is exception (Exception class EElPDFSignatureError with message 'Invalid digest') in the file SBPDF.pas the 2364 line.

If you open a PDF using Adobe Reader, and the signature is written, "The certification document is unknown. The author could not be verified.
Where, or what could be the problem?

I use PDFBlackbox VCL version 7.1.161 and Delphi (Borland Studio 2006).

Thank you for your advice
#12345
Posted: 02/09/2010 07:05:49
by Ken Ivanov (EldoS Corp.)

Thank you for contacting us.

Can you please zip and post the zipped signed document to the Helpdesk for investigation?
#12346
Posted: 02/09/2010 07:39:12
by Leos Krejci (Standard support level)
Joined: 02/09/2010
Posts: 2

I sent the document to the helpdesk.

Thank you for your help.

Leos Krejci

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