(Java) Convert Certificate from DER to PEM.

Loads a digital certificate from any format, such as DER, and saves to PEM format.

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();

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

    success = cert.ExportCertPemFile("qa_data/certs/testCert.pem");
    if (success != true) {
        System.out.println(cert.lastErrorText());
        return;
        }

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