(Java) Convert DSA PEM Private Key to DER

Converts a DSA private key from PEM format to DER. The first part of the example will convert an unencrypted PEM to DER, then 2nd part will convert an encrypted PEM to unencrypted DER.

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import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkDsa dsa = new CkDsa();

    // Load a PEM private key.
    String pemPrivateKey;
    pemPrivateKey = dsa.loadText("dsa_priv.pem");
    // Import the unencrypted PEM into the DSA object.
    boolean success = dsa.FromPem(pemPrivateKey);
    if (success != true) {
        System.out.println(dsa.lastErrorText());
        return;
        }

    // Write it out as a DER file:
    success = dsa.ToDerFile("dsa_priv.der");
    if (success != true) {
        System.out.println(dsa.lastErrorText());
        return;
        }

    // Load an encrypted PEM private key.
    pemPrivateKey = dsa.loadText("dsa_privEncrypted.pem");
    // Import the encrypted PEM into the DSA object.
    success = dsa.FromEncryptedPem("myPassword",pemPrivateKey);
    if (success != true) {
        System.out.println(dsa.lastErrorText());
        return;
        }

    // Write it out as an unencrypted DER file:
    success = dsa.ToDerFile("dsa_priv2.der");
    if (success != true) {
        System.out.println(dsa.lastErrorText());
        return;
        }

    System.out.println("Finished!");
  }
}