DES example

DESDemo.java

public class PrivateExample {

	public static void main(String[] args) throws Exception {
		
		KeyGenerator keyGenerator = KeyGenerator.getInstance("DES");
		SecretKey secretKey = keyGenerator.generateKey();
		
		String desString = Base64.encodeBase64String(secretKey.getEncoded());
		System.out.println("DES Base64 String: " + desString);
		
		byte[] iv = { 0, 0, 0, 0, 0, 0, 0, 0 };
	        IvParameterSpec ivspec = new IvParameterSpec(iv);
	    
		Cipher cipher = Cipher.getInstance("DES/CBC/PKCS5Padding");
		cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(Base64.decodeBase64(desString), "DES"), ivspec);
		byte[] encryptedData = cipher.doFinal("123456".getBytes());
		
		cipher.init(Cipher.DECRYPT_MODE, secretKey, ivspec);
		System.out.println(new String(cipher.doFinal(encryptedData)));
	}
}