(MFC) Convert Java KeyStore to PEM

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

Chilkat C/C++ Library Downloads MS Visual C/C++ Libs

See Also: Using MFC CString in Chilkat

#include <CkJavaKeyStore.h>
#include <CkFileAccess.h>
#include <CkCert.h>

void ChilkatSample(void)
    {
    CkString strOut;

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

    CkJavaKeyStore jks;

    const char *jksPassword = "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.
    bool success = jks.LoadFile(jksPassword,"/someDir/keyStore.jks");
    if (success != true) {
        strOut.append(jks.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        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.
    CkFileAccess fac;
    success = fac.OpenForWrite("/pemFiles/caCerts.pem");
    if (success != true) {
        strOut.append(fac.lastErrorText());
        strOut.append("\r\n");
        SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
        return;
    }

    int numCerts = jks.get_NumTrustedCerts();
    int i;

    CkCert *cert = 0;
    const char *pem = 0;

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

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

        // Append the PEM string to the open file.
        // The PEM contains only us-ascii chars..
        success = fac.AppendAnsi(pem);
        if (success != true) {
            strOut.append(fac.lastErrorText());
            strOut.append("\r\n");
            delete cert;
            SetDlgItemText(IDC_EDIT1,strOut.getUnicode());
            return;
        }

        delete cert;
        i = i + 1;
    }

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

    strOut.append("Trusted certificates saved to PEM.");
    strOut.append("\r\n");


    SetDlgItemText(IDC_EDIT1,strOut.getUnicode());

    }