(CkPython) Verify XAdES with External File Reference

Demonstrates how to validate an XML digital signature that contains a reference to an external file. (This is one way of doing it..)

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import sys
import chilkat

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

# Load the XAdES file to be validated..
sbXml = chilkat.CkStringBuilder()
success = sbXml.LoadFile("qa_data/xml_dsig_valid_samples/externalFile/test.pdf.XAdES","utf-8")
if (success == False):
    print("Failed to load XAdES input file.")
    sys.exit()

validator = chilkat.CkXmlDSig()

# Specify a set of absolute or relative directory paths to be searched for any external file references.
# Directory paths are separated by semicolon chars.
validator.put_ExternalRefDirs("qa_data/externalFiles;qa_data/xml_dsig_valid_samples/externalFile;c:/someOtherDir")

success = validator.LoadSignatureSb(sbXml)
if (success == False):
    print(validator.lastErrorText())
    sys.exit()

# Validate signatures as usual..
i = 0
while i < validator.get_NumSignatures() :
    validator.put_Selector(i)

    valid = validator.VerifySignature(True)
    print("Signature " + str(i + 1) + " and all reference digests OK = " + str(valid))

    i = i + 1