MainClass.java Source code

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Here is the source code for MainClass.java

Source

import java.security.Security;
import java.security.spec.AlgorithmParameterSpec;

import javax.crypto.Cipher;
import javax.crypto.KeyGenerator;
import javax.crypto.SecretKey;
import javax.crypto.spec.IvParameterSpec;

public class MainClass {
    public static void main(String args[]) throws Exception {
        Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
        SecretKey key = KeyGenerator.getInstance("DES").generateKey();

        // for CBC; must be 8 bytes
        byte[] initVector = new byte[] { 0x10, 0x10, 0x01, 0x04, 0x01, 0x01, 0x01, 0x02 };

        AlgorithmParameterSpec algParamSpec = new IvParameterSpec(initVector);
        Cipher m_encrypter = Cipher.getInstance("DES/CBC/PKCS5Padding");
        Cipher m_decrypter = Cipher.getInstance("DES/CBC/PKCS5Padding");

        m_encrypter.init(Cipher.ENCRYPT_MODE, key, algParamSpec);
        m_decrypter.init(Cipher.DECRYPT_MODE, key, algParamSpec);

        byte[] clearText = "www.java2s.com".getBytes();

        byte[] encryptedText = m_encrypter.doFinal(clearText);

        byte[] decryptedText = m_decrypter.doFinal(encryptedText);

        System.out.println(new String(clearText));
        System.out.println(new String(encryptedText));
        System.out.println(new String(decryptedText));

    }

}