(Python) Create CAdES-BES .p7m for FatturaPA XML Invoice

Demonstrates how to create a CAdES BES invoice.xml.p7m for the Italian FatturaPA exchange system.

Note: This example requires Chilkat v9.5.0.75.

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import sys
import chilkat

#  Note: Requires Chilkat v9.5.0.75 or greater.

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

crypt = chilkat.CkCrypt2()

#  Use a digital certificate and private key from a PFX file (.pfx or .p12).
pfxPath = "qa_data/pfx/cert_test123.pfx"
pfxPassword = "test123"

cert = chilkat.CkCert()
success = cert.LoadPfxFile(pfxPath,pfxPassword)
if (success != True):
    print(cert.lastErrorText())
    sys.exit()

#  Provide the signing cert (with associated private key).
success = crypt.SetSigningCert(cert)
if (success != True):
    print(crypt.lastErrorText())
    sys.exit()

#  Indicate that SHA-256 should be used.
crypt.put_HashAlgorithm("sha256")

#  Specify the signed attributes to be included.
#  (This is what makes it CAdES-BES compliant.)
jsonSignedAttrs = chilkat.CkJsonObject()
jsonSignedAttrs.UpdateInt("contentType",1)
jsonSignedAttrs.UpdateInt("signingTime",1)
jsonSignedAttrs.UpdateInt("messageDigest",1)
jsonSignedAttrs.UpdateInt("signingCertificateV2",1)
crypt.put_SigningAttributes(jsonSignedAttrs.emit())

inFile = "qa_data/xml/IT01234567890_11002.xml"
sigFile = "qa_output/IT01234567890_11002.xml.p7m"

#  Create the CAdES-BES signature, which contains the original data.
success = crypt.CreateP7M(inFile,sigFile)
if (success == False):
    print(crypt.lastErrorText())
    sys.exit()

print("Success.")