(Chilkat2-Python) Verify XML Digital Signature

Verifies XML signatures in an XML 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.

sbXml = chilkat2.StringBuilder()
success = sbXml.LoadFile("qa_data/xml_dsig_verify/csioz_sample.xml","utf-8")
if (success != True):
    print("Failed to load XML file.")
    sys.exit()

dsig = chilkat2.XmlDSig()

# First load the XML containing the signatures to be verified.
success = dsig.LoadSignatureSb(sbXml)
if (success != True):
    print(dsig.LastErrorText)
    sys.exit()

# It's possible that an XML document can contain multiple signatures.
# Each can be verified as follows:
i = 0
while i < dsig.NumSignatures :
    # Select the Nth signature by setting the Selector property.
    dsig.Selector = i

    # The bVerifyReferenceDigests argument determines if we want
    # to also verify each reference digest.  If set to False,
    # then only the SignedInfo part of the Signature is verified.
    bVerifyReferenceDigests = True
    bVerified = dsig.VerifySignature(bVerifyReferenceDigests)
    print("Signature " + str(i + 1) + " verified = " + str(bVerified))

    i = i + 1