Java tutorial
import java.io.File; import java.io.FileInputStream; import java.security.cert.CertificateFactory; public class Main { public static void main(String[] argv) throws Exception { FileInputStream is = new FileInputStream(new File("your")); CertificateFactory cf = CertificateFactory.getInstance("X.509"); java.security.cert.Certificate cert = cf.generateCertificate(is); } }