C++

Download and Trust the DigiCert Global Root CA

See more Certificates Examples

Demonstrates how to download a root certificate and trust it. C++

#include <CkHttp.h>
#include <CkBinData.h>
#include <CkCert.h>
#include <CkTrustedRoots.h>

void ChilkatSample(void)
    {
    bool success = false;

    //  This requires the Chilkat API to have been previously unlocked.
    //  See Global Unlock Sample for sample code.

    //  In this example, the URLs for the DigiCert root CA certs are available at this web page:
    //  https://www.digicert.com/digicert-root-certificates.htm

    //  This example downloads the "DigiCert Global Root G3"
    //  Valid until: 15/Jan/2038
    //  Serial #: 05:55:56:BC:F2:5E:A4:35:35:C3:A4:0F:D5:AB:45:72
    //  Thumbprint: 7E04DE896A3E666D00E687D33FFAD93BE83D349E

    const char *certUrl = "https://dl.cacerts.digicert.com/DigiCertGlobalRootG3.crt";

    CkHttp http;
    CkBinData bdCert;
    success = http.DownloadBd(certUrl,bdCert);
    if (success == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    //  Load it into a Chilkat cert object.
    CkCert cert;
    success = cert.LoadFromBd(bdCert);
    if (success == false) {
        std::cout << cert.lastErrorText() << "\r\n";
        return;
    }

    //  Examine the common name,serial, and thumbprint:
    std::cout << "CN: " << cert.subjectCN() << "\r\n";
    std::cout << "Serial: " << cert.serialNumber() << "\r\n";
    std::cout << "Thumbprint: " << cert.sha1Thumbprint() << "\r\n";

    //  Output from the above:
    //  CN: DigiCert Global Root G3
    //  Serial: 055556BCF25EA43535C3A40FD5AB4572
    //  Thumbprint: 7E04DE896A3E666D00E687D33FFAD93BE83D349E

    //  If desired, the certificate can be saved to a local file so it does not need
    //  to be downloaded from the website every time.  
    const char *certPath = "qa_data/certs/DigiCertGlobalRootG3.crt";
    success = bdCert.WriteFile(certPath);

    //  To load the cert from a file...
    success = cert.LoadFromFile(certPath);

    //  Do the following to add the cert to the collection of trusted roots
    //  for this application.  (Note:  The trust is not persisted.  Each time the
    //  application runs, it should load the cert (from whatever source, whether it is
    //  a file, a database,etc.) and do the following:
    CkTrustedRoots troots;

    troots.AddCert(cert);
    troots.Activate();

    std::cout << cert.subjectCN() << " is now trusted for this run of this application." << "\r\n";
    }