Retrieving signature from CERT or PDF file of signee.

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how return name in signature file? exported xml using c# and  no information in signature. want store signature of each signer of document repeatedly use.than his/her name lookup refer document he/she signed.  can store name in database table name of file pdf dynamically opened dropdown select.

it difficult understand you're asking. "signature file" start with? signed pdf? have wrote program in c# export, presumably, pdf xml or did program else?

apparently program did not process pdf file properly. digital signature in pdf special type of form field (see pdf specification). if program correctly traverses pdf object tree , writes out objects finds, write out content of signature fields.

from pdf point of view digital signature in pdf hex string represents hex-encoded pkcs#7 object. program parses pdf needs parse pksc#7 objects in signature form fields if want extract certificate signature signed , signer's name in it.



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