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import javax.crypto.*; import java.security.*; public class Java { private static SecretKey key = null; private static Cipher cipher = null; public static void main(String[] args) throws Exception { KeyGenerator keyGenerator = KeyGenerator.getInstance("AES"); keyGenerator.init(128); SecretKey secretKey = keyGenerator.generateKey(); cipher = Cipher.getInstance("AES"); String clearText = "hola"; byte[] clearTextBytes = clearText.getBytes("UTF8"); System.out.println("Texto en claro: " + clearText); System.out.println("Texto en Bytes claro: " + clearTextBytes); cipher.init(Cipher.ENCRYPT_MODE, secretKey); byte[] cipherBytes = cipher.doFinal(clearTextBytes); String cipherText = new String(cipherBytes, "UTF8"); System.out.println("Texto cifrado: " + cipherText); System.out.println("Texto en Bytes cifrado: " + cipherBytes); cipher.init(Cipher.DECRYPT_MODE, secretKey); byte[] decryptedBytes = cipher.doFinal(cipherBytes); String decryptedText = new String(decryptedBytes, "UTF8"); System.out.println("Texto descifrado: " + decryptedText); System.out.println("Texto en Bytes cifrado: " + decryptedBytes); } } |