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Adobe Summit 2023 [19th to 23rd March, Las Vegas and Virtual] | Complete AEM Session & Lab list

How to extract signature/certificate from PDF


Not applicable
Hi everyone!!! I have a problem and hope someone can help me.

I have a PDF form accessed via a secure connection which requires the user to identify himself using a digital certificate, and the PDF has to be signed in order to be sent and processed by a J2EE application.

When I receive the signed PDF, I must verify that the certificate used to sign the PDF is the same that was used to access the web page. I can get the certificate used to access the web from the session; but I have no idea of how can I extract the certificate from the PDF, I can access the date contained in the PDF but I don't see the node where the certificate is stored(in case it is stored).

Thanks in advance for the help.
2 Replies


Not applicable

did you find a solution for your problem?



Not applicable
No way.

We are trying to solve it via a different way.

Adobe Suppport told us there is a way of limiting which certificates can sign a Signature Field, and we are trying to find out how to do that, so we would allow only one specific certificate to sign the Signature field; this solution would fit us even better.

I'll post here if we find a solution.