MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.math.BigInteger;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.MessageDigest;
import java.security.SecureRandom;
import java.security.Security;

import javax.crypto.KeyAgreement;
import javax.crypto.spec.DHParameterSpec;

public class MainClass {
    private static BigInteger g512 = new BigInteger("1234567890", 16);

    private static BigInteger p512 = new BigInteger("1234567890", 16);

    public static void main(String[] args) throws Exception {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());

        DHParameterSpec dhParams = new DHParameterSpec(p512, g512);
        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("DH", "BC");

        keyGen.initialize(dhParams, new SecureRandom());

        KeyAgreement aKeyAgree = KeyAgreement.getInstance("DH", "BC");
        KeyPair aPair = keyGen.generateKeyPair();
        KeyAgreement bKeyAgree = KeyAgreement.getInstance("DH", "BC");
        KeyPair bPair = keyGen.generateKeyPair();

        aKeyAgree.init(aPair.getPrivate());
        bKeyAgree.init(bPair.getPrivate());

        aKeyAgree.doPhase(bPair.getPublic(), true);
        bKeyAgree.doPhase(aPair.getPublic(), true);

        MessageDigest hash = MessageDigest.getInstance("SHA1", "BC");
        System.out.println(new String(hash.digest(aKeyAgree.generateSecret())));
        System.out.println(new String(hash.digest(bKeyAgree.generateSecret())));
    }
}