(Unicode C++) Convert Java KeyStore to PEM

Loads a Java keystore file and saves the trusted certificate entries to a PEM file.

Note: This example requires Chilkat v11.0.0 or greater.

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#include <CkJavaKeyStoreW.h>
#include <CkFileAccessW.h>
#include <CkCertW.h>

void ChilkatSample(void)
    {
    bool success = false;

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

    CkJavaKeyStoreW jks;

    const wchar_t *jksPassword = L"myJksPassword";

    // Load the Java keystore from a file.  The JKS file password is used
    // to verify the keyed digest that is found at the very end of the keystore.
    // It verifies that the keystore has not been modified.
    success = jks.LoadFile(jksPassword,L"/someDir/keyStore.jks");
    if (success == false) {
        wprintf(L"%s\n",jks.lastErrorText());
        return;
    }

    // Open/create the output PEM file. 
    // This example uses Chilkat's file access class for writing the output file.
    // You may replace the file I/O lines of code with whatever is most convenient for you.
    CkFileAccessW fac;
    success = fac.OpenForWrite(L"/pemFiles/caCerts.pem");
    if (success == false) {
        wprintf(L"%s\n",fac.lastErrorText());
        return;
    }

    int numCerts = jks.get_NumTrustedCerts();

    CkCertW cert;
    const wchar_t *pem = 0;

    // Iterate over the trusted certs, get the PEM for each,
    // and append it to the output file.
    int i = 0;
    while (i < numCerts) {
        jks.TrustedCertAt(i,cert);

        // Get the certificate in PEM format.  
        pem = cert.exportCertPem();

        // Append the PEM string to the open file.
        success = fac.AppendText(pem,L"utf-8");
        if (success != true) {
            wprintf(L"%s\n",fac.lastErrorText());
            return;
        }

        i = i + 1;
    }

    // Close the output file.
    fac.FileClose();

    wprintf(L"Trusted certificates saved to PEM.\n");
    }