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Verify a signature

Question

How can i verify a digital signature in a pdf file. In my application i have to verify if a pfd-file has a valid signature or not. How can i do this with quickpdf? Is there a function to check if the document is secured with a signature an how do i to extract the signature for further verification.

Answer

Quick PDF Library does not currently contain any functions that would allow you to validate digital signatures. It's currently only possible to add digital signatures using our library, not validate them.

You can also check for security settings with Quick PDF, but again, this would not check to see if a digital signature was valid. It would just check to see if the PDF contained any security settings.


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