Chilkat2-Python

A3 Certificate Sign PDF to pdf.p7s

See more CAdES Examples

Demonstrates how to use an A3/A4 certificate on a smartcard or hardware token to convert a PDF into a .p7s file that contains the PDF within a PKCS7 signature (the .p7s format). Chilkat2-Python

import sys
import chilkat2

success = False

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

crypt = chilkat2.Crypt2()

cert = chilkat2.Cert()

# If the smartcard or token requires a PIN, we can set it here to avoid the dialog...
cert.SmartCardPin = "000000"

success = cert.LoadFromSmartcard("")
if (success != True):
    print(cert.LastErrorText)
    sys.exit()

# Tell the crypt component to use this cert.
success = crypt.SetSigningCert(cert)
if (success != True):
    print(crypt.LastErrorText)
    sys.exit()

# The CadesEnabled property applies to all methods that create PKCS7 signatures. 
# To create a CAdES-BES signature, set this property equal to true. 
crypt.CadesEnabled = True

crypt.HashAlgorithm = "sha256"

# We can sign any type of file, creating a .p7s as output.
# The .p7s contains the signature and also embeds the data of the file that is signed.
inFile = "qa_data/pdf/sample.pdf"
p7sFile = "qa_output/sample.pdf.p7s"

# Create the CAdES-BES attached signature, which contains the original data.
# Note: Chilkat's function naming is not accurate.  CreateP7M creates a PKCS7 signature where the signed file
# is contained within the signature.  CreateP7S creates a detached PKCS7 signature where the signed file
# is NOT contained within the signature.  We want the data to be contained in the signature, therefore
# we call CreateP7M even though we are naming our output file .p7s.
success = crypt.CreateP7M(inFile,p7sFile)
if (success == False):
    print(crypt.LastErrorText)
    sys.exit()

# Verify the .p7s file and extract the original file from the .p7s. 
extractedToFilePath = "qa_output/sample.pdf"
success = crypt.VerifyP7M(p7sFile,extractedToFilePath)
if (success == False):
    print(crypt.LastErrorText)
    sys.exit()

print("Success!")