(Unicode C++) Add a Document Timestamp Signature to an already-signed PDF

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Demonstrates how to add a document timestamp signature to an already-signed PDF.

Note: This example requires Chilkat v9.5.0.99 or greater.

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#include <CkPdfW.h>
#include <CkJsonObjectW.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 the PDF that has already been signed.
    bool success = pdf.LoadFile(L"qa_data/pdf/helloWorld_signed.pdf");
    if (success == false) {
        wprintf(L"%s\n",pdf.lastErrorText());
        return;
    }

    CkJsonObjectW json;

    json.UpdateBool(L"invisibleSignature",true);
    json.UpdateString(L"subFilter",L"/ETSI.RFC3161");

    json.UpdateBool(L"timestampToken.enabled",true);

    // In this example, we'll use a free TSA server (timestamp.digicert.com), but you may want to use your own timestamp authority server.
    json.UpdateString(L"timestampToken.tsaUrl",L"http://timestamp.digicert.com");

    // If the timestamp server requires a username/password, do the following.  Otherwise omit the following few lines of code.
    json.UpdateString(L"timestampToken.tsaUsername",L"the_tsa_username");
    json.UpdateString(L"timestampToken.tsaPassword",L"the_tsa_password");

    // When requesting the timestamp token, ask the server to include its certificate in the timestamp token response.
    // This allows for the timestamp server's certificate to be included in the LTV validation (i.e. if the timestamp server
    // has an OCSP URL, then Chilkat will also do the OCSP request for the timestamp server's certificate.)
    json.UpdateBool(L"timestampToken.requestTsaCert",true);

    success = pdf.SignPdf(json,L"c:/temp/qa_output/helloWorld_signed_2.pdf");
    if (success == false) {
        wprintf(L"%s\n",pdf.lastErrorText());
        return;
    }

    wprintf(L"Successfully added a Document Timestamp Signature to the PDF\n");
    }