(Ruby) 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..)

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require '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.new()
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." + "\n";
    exit
end

validator = Chilkat::CkXmlDSig.new()

# 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() + "\n";
    exit
end

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

    valid = validator.VerifySignature(true)
    print "Signature " + (i + 1).to_s() + " and all reference digests OK = " + valid.to_s() + "\n";

    i = i + 1
end