(Chilkat2-Python) Extract XML from FatturaPA .p7m

Demonstrates how to verify the signature and extract the XML from a FatturaPA .p7m file.

Chilkat2 Python Downloads install with pip pip3 install chilkat2 or download... Python Module for Windows, Linux, Alpine Linux, MacOS, Solaris

import sys
import chilkat2

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

bd = chilkat2.BinData()
success = bd.LoadFile("qa_data/p7m/IT01879020517_abc.xml.p7m")
if (success != True):
    print("Failed to load the .p7m file")
    sys.exit()

crypt = chilkat2.Crypt2()

# Verify and extrct the payload contained within the .p7m.
# In this case, the payload is the FatturaPA XML.
# If successful, the resulting bd will contain only the XML.
bVerified = crypt.OpaqueVerifyBd(bd)
if (bVerified != True):
    print(crypt.LastErrorText)
    print("Failed to extract and verify.")
    sys.exit()

# Save the XML to a file.
bd.WriteFile("qa_output/zIT01879020517_abc.xml")

# Alternatively, load into an XML object and emit.
xml = chilkat2.Xml()
xml.LoadXml(bd.GetString("utf-8"))

print(xml.GetXml())