(C++) Get the Certificate with Private Key from a Java KeyStore

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Load a Chilkat certificate object from a Java KeyStore.

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#include <CkJavaKeyStore.h>
#include <CkCertChain.h>
#include <CkCert.h>
#include <CkCrypt2.h>

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

    // Most of the time a .jks contains one certificate with it's associated private key.
    // (Similar to how a .pfx/.p12 usually contains a particular certificate with private key.)
    // This example demonstrates how to get the certificate with private key such that it can be used
    // by other Chilkat classes wherever a cert w/ private key is needed.
    CkJavaKeyStore jks;
    const char *password = "secret";
    bool success = jks.LoadFile(password,"qa_data/jks/test_secret.jks");
    if (success != true) {
        std::cout << jks.lastErrorText() << "\r\n";
        return;
    }

    // Make sure we have a private key.
    if (jks.get_NumPrivateKeys() < 1) {
        std::cout << "No private key available." << "\r\n";
        return;
    }

    // -------------------------------------------------------------------------
    // Get the certificate chain associated with the 1st (and probably only) private key in the JKS.
    CkCertChain *chain = jks.GetCertChain(0);
    if (jks.get_LastMethodSuccess() != true) {
        std::cout << jks.lastErrorText() << "\r\n";
        return;
    }

    CkCert *cert = chain->GetCert(0);
    if (chain->get_LastMethodSuccess() != true) {
        std::cout << chain->lastErrorText() << "\r\n";
        delete chain;
        return;
    }

    delete chain;

    // Verify again that this cert has a private key.
    if (cert->HasPrivateKey() != true) {
        std::cout << "Certificate has no associated private key." << "\r\n";
        delete cert;
        return;
    }

    // We now have the cert object with it's associated private key, and it can be used in other Chilkat classes where needed.
    // For example..

    CkCrypt2 crypt;
    success = crypt.SetSigningCert(*cert);
    if (success == false) {
        std::cout << crypt.lastErrorText() << "\r\n";
        return;
    }

    // ...
    // ...

    delete cert;
    }