MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.io.FileInputStream;
import java.math.BigInteger;
import java.security.PublicKey;
import java.security.cert.CertificateFactory;
import java.security.cert.X509Certificate;

public class MainClass {

    public static void main(String args[]) throws Exception {
        CertificateFactory cf = CertificateFactory.getInstance("X.509");
        FileInputStream in = new FileInputStream(args[0]);
        java.security.cert.Certificate c = cf.generateCertificate(in);
        in.close();

        X509Certificate t = (X509Certificate) c;
        System.out.println(t.getVersion());
        System.out.println(t.getSerialNumber().toString(16));
        System.out.println(t.getSubjectDN());
        System.out.println(t.getIssuerDN());
        System.out.println(t.getNotBefore());
        System.out.println(t.getNotAfter());
        System.out.println(t.getSigAlgName());
        byte[] sig = t.getSignature();
        System.out.println(new BigInteger(sig).toString(16));
        PublicKey pk = t.getPublicKey();
        byte[] pkenc = pk.getEncoded();
        for (int i = 0; i < pkenc.length; i++) {
            System.out.print(pkenc[i] + ",");
        }
    }
}