(Java) Convert to DER encoded X.509 Certificate (.cer, .crt)

Loads a digital certificate from any format and saves to a binary DER encoded X.509 Certificate (.cer, .crt).

Chilkat Java Downloads Java Libs for Windows, MacOS, Linux, Alpine Linux, Solaris Java Libs for Android

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;

    //  LoadFromFile will load virtually any certificate format file.
    //  It will auto-recognize the format and load appropiately.
    //  In this case, load a PEM format certificate and convert to DER.
    success = cert.LoadFromFile("/Users/chilkat/testData/pem/chilkat.pem");
    if (success != true) {
        System.out.println(cert.lastErrorText());
        return;
        }

    success = cert.ExportCertDerFile("chilkat.der");
    if (success != true) {
        System.out.println(cert.lastErrorText());
        return;
        }

    System.out.println("Converted certificate from PEM to DER format.");
  }
}