(Unicode C++) Get Certificates within XML Signature

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

Chilkat C/C++ Library Downloads
MS Visual C/C++ Linux/CentOS C/C++ Alpine Linux C/C++ MAC OS X C/C++	armhf/aarch64 C/C++ C++ Builder iOS C/C++ Android C/C++	Solaris C/C++ MinGW C/C++

#include <CkStringBuilderW.h>
#include <CkXmlDSigW.h>
#include <CkStringArrayW.h>
#include <CkCertW.h>

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

    CkStringBuilderW sbXml;

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

    CkXmlDSigW 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) {
        wprintf(L"%s\n",dsig.lastErrorText());
        return;
    }

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

    wprintf(L"numSignatures = %d\n",dsig.get_NumSignatures());

    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);
        wprintf(L"Signature %d verified = %d\n",i + 1,bVerified);

        // 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) {
                    wprintf(L"    %s\n",cert.subjectDN());
                }

                j = j + 1;
            }

        }

        i = i + 1;
    }
    }