(Unicode C++) Sign a PDF using IDPrime MD T=1 SmartCard

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This example demonstrates how to a sign a PDF using a IDPrime MD T=1 smart card, which requires more specific PIN roles.

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#include <CkPdfW.h>
#include <CkJsonObjectW.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.

    CkPdfW pdf;

    // Load a PDF to be signed.
    // The "hello.pdf" is available at https://chilkatsoft.com/hello.pdf
    bool success = pdf.LoadFile(L"qa_data/pdf/hello.pdf");
    if (success == false) {
        wprintf(L"%s\n",pdf.lastErrorText());
        return;
    }

    // Options for signing are specified in JSON.
    CkJsonObjectW json;

    // In most cases, the signingCertificateV2 and signingTime attributes are required.
    json.UpdateInt(L"signingCertificateV2",1);
    json.UpdateInt(L"signingTime",1);

    // Put the signature on page 1, top left
    json.UpdateInt(L"page",1);
    json.UpdateString(L"appearance.y",L"top");
    json.UpdateString(L"appearance.x",L"left");

    // Use a font scale of 10.0
    json.UpdateString(L"appearance.fontScale",L"10.0");

    // In this example, the appearance of the digital signature will contain three lines:
    // 1) The signing certificate's common name
    // 2) The current date/time
    // 3) Some arbitrary text.
    // The keyword "cert_cn" is replaced with the Certificate's Subject Common Name.
    // The keyword "current_dt" is replaced with the current date/time.
    // Any number of appearance text lines can be added.
    json.UpdateString(L"appearance.text[0]",L"Digitally signed by: cert_cn");
    json.UpdateString(L"appearance.text[1]",L"current_dt");
    json.UpdateString(L"appearance.text[2]",L"The crazy brown fox jumps over the lazy dog.");

    CkCertW cert;

    // Provide the smart card PIN's for both the "user" and the signing PIN, which is role "3".
    // These PINs may be the same.

    // If the PIN is not explicitly provided here, the Windows OS should
    // display a dialog for the PIN.
    cert.put_SmartCardPin(L"{ \"user\":\"0000\", \"3\":\"12345678\" }");

    // Use a certificate on an IDPrime MD T=1 smart card.
    success = cert.LoadFromSmartcard(L"");
    if (success == false) {
        wprintf(L"%s\n",cert.lastErrorText());
        return;
    }

    // Tell the pdf object to use the certificate for signing.
    success = pdf.SetSigningCert(cert);
    if (success == false) {
        wprintf(L"%s\n",pdf.lastErrorText());
        return;
    }

    success = pdf.SignPdf(json,L"qa_output/hello_signed_hsm.pdf");
    if (success == false) {
        wprintf(L"%s\n",pdf.lastErrorText());
        return;
    }

    wprintf(L"The PDF has been successfully cryptographically signed using an HSM.\n");
    }