(Java) Get Certificate Subject Part by Name or OID

Demonstrates the GetSubjectPart method where a name or OID can be passed.

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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[])
  {
    CkCert cert = new CkCert();

    boolean success = cert.LoadByCommonName("myCert");
    if (success == false) {
        System.out.println(cert.lastErrorText());
        return;
        }

    // This example demonstrates getting the SERIALNUMBER part of the subject,
    // if one such part exists in the cert's subject.
    // Not too many certicates include the serial number in the Subject.
    // (Chilean issued certificates for SII is one such case where the SERIALNUMBER part exists within the Subject.)
    String serialNum = cert.getSubjectPart("SERIALNUMBER");
    if (cert.get_LastMethodSuccess() == false) {
        System.out.println("No SERIALNUMBER part exists.");
        return;
        }

    System.out.println(serialNum);

    // We could also get the part by the OID.
    // See https://oidref.com/2.5.4.5 for a list of OID's in the 2.5.4.* range..
    // The OID for SERIALNUMBER is "2.5.4.5"
    serialNum = cert.getSubjectPart("2.5.4.5");
    if (cert.get_LastMethodSuccess() == false) {
        System.out.println("No SERIALNUMBER part exists.");
        return;
        }

    System.out.println(serialNum);
  }
}