MainClass.java Source code

Introduction

Here is the source code for MainClass.java

Source

import java.security.Key;
import java.security.Provider;
import java.security.SecureRandom;
import java.security.Security;

import javax.crypto.Cipher;

public final class MainClass {
    String providerName = "Rot13Provider";

    String algorithmName = "ROT13";

    public static void main(String[] args) throws Exception {
        Provider p = Security.getProvider("Rot13Provider");
        System.out.println("Provider name: " + p.getName());
        System.out.println("Provider version: " + p.getVersion());
        System.out.println("Provider information: " + p.getInfo());

        Cipher cipher = Cipher.getInstance("ROT13", "Rot13Provider");
        System.out.println("Cipher: " + cipher.getAlgorithm());
        String testString = "This is a test!";
        cipher.init(Cipher.ENCRYPT_MODE, (Key) null, new SecureRandom());
        byte[] b1 = cipher.doFinal(testString.getBytes());
        cipher.init(Cipher.DECRYPT_MODE, (Key) null, new SecureRandom());
        byte[] b2 = cipher.doFinal(b1);
        System.out.println("Decrypted data as a String: " + new String(b2));
    }
}