CkPython

Get PDF Signer Certs

See more PDF Signatures Examples

This example demonstrates how to validate the signatures in a PDF and also shows how to get CkPython

import sys
import chilkat

success = False

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

pdf = chilkat.CkPdf()

# Load a PDF that has cryptographic signatures to be validated
success = pdf.LoadFile("qa_data/pdf/sign_testing_1/helloSigned2.pdf")
if (success == False):
    print(pdf.lastErrorText())
    sys.exit()

# Each time we verify a signature, information about the signature is written into
# sigInfo (replacing whatever sigInfo previously contained).
sigInfo = chilkat.CkJsonObject()

# Iterate over each signature and validate each.
numSignatures = pdf.get_NumSignatures()
validated = False
cert = chilkat.CkCert()
i = 0
while i < numSignatures :
    validated = pdf.VerifySignature(i,sigInfo)
    print("Signature " + str(i) + " validated: " + str(validated))

    # After calling VerifySignature, you can get the signer certificate by calling
    # GetSignerCert with the same index. 
    success = pdf.GetSignerCert(i,cert)
    if (success != False):
        print("PDF signer certificate: " + cert.subjectDN())

    i = i + 1

print("Finished.")