Unicode C

Convert Java KeyStore to PEM

See more Java KeyStore (JKS) Examples

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

#include <C_CkJavaKeyStoreW.h>
#include <C_CkFileAccessW.h>
#include <C_CkCertW.h>

void ChilkatSample(void)
    {
    BOOL success;
    HCkJavaKeyStoreW jks;
    const wchar_t *jksPassword;
    HCkFileAccessW fac;
    int numCerts;
    HCkCertW cert;
    const wchar_t *pem;
    int i;

    success = FALSE;

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

    jks = CkJavaKeyStoreW_Create();

    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 = CkJavaKeyStoreW_LoadFile(jks,jksPassword,L"/someDir/keyStore.jks");
    if (success == FALSE) {
        wprintf(L"%s\n",CkJavaKeyStoreW_lastErrorText(jks));
        CkJavaKeyStoreW_Dispose(jks);
        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.
    fac = CkFileAccessW_Create();
    success = CkFileAccessW_OpenForWrite(fac,L"/pemFiles/caCerts.pem");
    if (success == FALSE) {
        wprintf(L"%s\n",CkFileAccessW_lastErrorText(fac));
        CkJavaKeyStoreW_Dispose(jks);
        CkFileAccessW_Dispose(fac);
        return;
    }

    numCerts = CkJavaKeyStoreW_getNumTrustedCerts(jks);

    cert = CkCertW_Create();

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

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

        // Append the PEM string to the open file.
        success = CkFileAccessW_AppendText(fac,pem,L"utf-8");
        if (success != TRUE) {
            wprintf(L"%s\n",CkFileAccessW_lastErrorText(fac));
            CkJavaKeyStoreW_Dispose(jks);
            CkFileAccessW_Dispose(fac);
            CkCertW_Dispose(cert);
            return;
        }

        i = i + 1;
    }

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

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


    CkJavaKeyStoreW_Dispose(jks);
    CkFileAccessW_Dispose(fac);
    CkCertW_Dispose(cert);

    }