(C++) Get Certificates within XML Signature

Demonstrates how to get the certificates contained within an XML signature.

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#include <CkStringBuilder.h>
#include <CkXmlDSig.h>
#include <CkStringArray.h>
#include <CkCert.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkStringBuilder sbXml;

    // Load XML containing one or more signatures.
    bool success = sbXml.LoadFile("qa_data/xml_dsig_valid_samples/multipleSigners/sp.pdf.XAdES.xml","utf-8");
    if (success == false) {
        std::cout << "Failed to load the XML file.." << "\r\n";
        return;
    }

    CkXmlDSig dsig;

    // First load the XML containing the signatures to be verified.
    // Note that this particular Signature already contains the RSA public key that will be used
    // for verification.
    success = dsig.LoadSignatureSb(sbXml);
    if (success != true) {
        std::cout << dsig.lastErrorText() << "\r\n";
        return;
    }

    // For each signature, verify and also get the certificate(s) contained within each Signature.
    int i = 0;
    CkStringArray saCerts;
    CkCert cert;

    std::cout << "numSignatures = " << dsig.get_NumSignatures() << "\r\n";

    while (i < dsig.get_NumSignatures()) {
        // Select the Nth signature by setting the Selector property.
        dsig.put_Selector(i);

        bool bVerifyReferenceDigests = true;
        bool bVerified = dsig.VerifySignature(bVerifyReferenceDigests);
        std::cout << "Signature " << (i + 1) << " verified = " << bVerified << "\r\n";

        // Get the certificates embedded in this signature.
        saCerts.Clear();
        success = dsig.GetCerts(saCerts);
        if (success == true) {
            int j = 0;
            while (j < saCerts.get_Count()) {
                success = cert.LoadFromBase64(saCerts.getString(j));
                if (success == true) {
                    std::cout << "    " << cert.subjectDN() << "\r\n";
                }

                j = j + 1;
            }

        }

        i = i + 1;
    }
    }