MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.math.BigInteger;
import java.security.KeyFactory;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.spec.RSAKeyGenParameterSpec;
import java.security.spec.RSAPublicKeySpec;

public class MainClass {
    public static void main(String[] args) throws Exception {
        int eValue = 79;
        int bitLength = 1024; // KeySize

        BigInteger e = e = new BigInteger(Integer.toString(eValue));

        KeyPairGenerator kpg = KeyPairGenerator.getInstance("RSA");
        kpg.initialize(bitLength);
        KeyPair kp = kpg.generateKeyPair();

        KeyFactory kfactory = KeyFactory.getInstance("RSA");
        RSAPublicKeySpec kspec = (RSAPublicKeySpec) kfactory.getKeySpec(kp.getPublic(), RSAPublicKeySpec.class);

        kpg = KeyPairGenerator.getInstance("RSA", "SunRsaSign");

        e = new BigInteger(Integer.toString(eValue));
        System.out.println("e =" + e);
        RSAKeyGenParameterSpec param = new RSAKeyGenParameterSpec(bitLength, e);
        kpg.initialize(param);
        kp = kpg.generateKeyPair();

        kfactory = KeyFactory.getInstance("RSA", "SunRsaSign");

        kspec = (RSAPublicKeySpec) kfactory.getKeySpec(kp.getPublic(), RSAPublicKeySpec.class);
    }
}