MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.SecureRandom;
import java.security.Security;
import java.security.Signature;

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

        KeyPairGenerator keyGen = KeyPairGenerator.getInstance("RSA", "BC");

        keyGen.initialize(512, new SecureRandom());

        KeyPair keyPair = keyGen.generateKeyPair();
        Signature signature = Signature.getInstance("SHA1withRSA", "BC");

        signature.initSign(keyPair.getPrivate(), new SecureRandom());

        byte[] message = "abc".getBytes();
        signature.update(message);

        byte[] sigBytes = signature.sign();
        signature.initVerify(keyPair.getPublic());
        signature.update(message);
        System.out.println(signature.verify(sigBytes));
    }
}