How to verify PKCS#7 signature and timestamp present in PDF

Hi,
I have certified the PDF and embedded the digital signature with timestamp using iText and Bouncy Castle API's. Can anybody tells me that how to verify the PKCS#7 digital signature, certificate chain and timestamp present in the PDF?
thanks
Gurpreet Singh

I think you're pretty much on your own for this. You can probably eliminate
some files based on exstension. For the rest you might want to read the
first 1K and check whether it's all ASCII and whether the first line looks like
a mail header line (e.g., starts with an alpha character and contains a colon).

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On 4/17/2015 1:21 AM, Babu12345 wrote:
*Hi we are developing Win 7 VC++ app using Crypto APIs. *
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How to verify PKCS#7 signature and timestamp present in PDF

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