(Unicode C++) Change Password for Java KeyStore File

Demonstrates how to load a Java keystore, change the password, and save using the new password. If the Java keystore contains only trusted root certificates, then it's simply a matter of loading the JKS with the existing password, and then saving with a new password. If the JKS contains private key entries, then each private key entry must be re-keyed using the new password by calling the ChangePassword method.

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#include <CkJavaKeyStoreW.h>

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

    CkJavaKeyStoreW jks;

    const wchar_t *oldJksPassword = L"existingPassword";
    const wchar_t *newJksPassword = L"newPassword";
    const wchar_t *jksPath = L"/someDir/keyStore.jks";

    // Load the Java keystore from a file.
    bool success = jks.LoadFile(oldJksPassword,jksPath);
    if (success != true) {
        wprintf(L"%s\n",jks.lastErrorText());
        return;
    }

    // If the JKS contains private key entries, then each
    // must be re-keyed with the new password by calling ChangePassword.
    int numPrivateKeys = jks.get_NumPrivateKeys();

    int i = 0;
    while (i < numPrivateKeys) {

        success = jks.ChangePassword(i,oldJksPassword,newJksPassword);
        if (success != true) {
            wprintf(L"%s\n",jks.lastErrorText());
            return;
        }

        i = i + 1;
    }

    // Write the JKS using the new password for the JKS file's keyed digest.
    success = jks.ToFile(newJksPassword,jksPath);
    if (success != true) {
        wprintf(L"%s\n",jks.lastErrorText());
        return;
    }

    wprintf(L"Updated the password for the Java keystore file.\n");
    }