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CkPython Examples

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(CkPython) Verify XML Digital Signature

Verifies XML signatures in an XML file.

Chilkat Python Downloads

Python Module for Windows, Linux, Alpine Linux,
MAC OS X, Solaris, FreeBSD, OpenBSD,
Raspberry Pi and other single board computers

import sys
import chilkat

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

sbXml = chilkat.CkStringBuilder()
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 = chilkat.CkXmlDSig()

# 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.get_NumSignatures() :
    # Select the Nth signature by setting the Selector property.
    dsig.put_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


 

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