(C++) 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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#include <CkStringBuilder.h>
#include <CkXmlDSig.h>

void ChilkatSample(void)
    {
    // 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..
    CkStringBuilder sbXml;
    bool success = sbXml.LoadFile("qa_data/xml_dsig_valid_samples/externalFile/test.pdf.XAdES","utf-8");
    if (success == false) {
        std::cout << "Failed to load XAdES input file." << "\r\n";
        return;
    }

    CkXmlDSig validator;

    // 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) {
        std::cout << validator.lastErrorText() << "\r\n";
        return;
    }

    // Validate signatures as usual..
    int i = 0;
    while (i < validator.get_NumSignatures()) {
        validator.put_Selector(i);

        bool valid = validator.VerifySignature(true);
        std::cout << "Signature " << (i + 1) << " and all reference digests OK = " << valid << "\r\n";

        i = i + 1;
    }
    }