Hola a todos.
Mi consulta es la siquiente estoy tratando de cifrar un archivo con 3DES(TripleDes) he encontrado ejemplos de como se hace esto con cadenas de texto y funcionan, pero me entro la duda que pasa si es un archivo el que deseo cifrar, no he encontrado ejemplos en la web a ecepcion de este:
Ya lo probe y parece hacer la encritacion bien pero al momento de desencritar me devuelve 0 talvez puedan ayudarme, u orientarme. Saludos.
Esta es la parte de cifrar.
public class Encryptor {
private static String inputFilePath = "D:/1.txt";
public static void main(String[] args) {
FileOutputStream fos = null;
File file = new File(inputFilePath);
String keyString = "140405PX_0.$88";
String algorithm = "DESede";
try {
FileInputStream fileInputStream = new FileInputStream(file);
byte[] fileByteArray = new byte[fileInputStream.available()];
fileInputStream.read(fileByteArray);
for (byte b : fileByteArray) {
System.out.println(b);
}
SecretKey secretKey = getKey(keyString);
Cipher cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.ENCRYPT_MODE, secretKey);
ObjectOutputStream objectOutputStream = new ObjectOutputStream
(new CipherOutputStream
(new FileOutputStream
("D:/Secret.file"), cipher));
objectOutputStream.writeObject(fileByteArray);
objectOutputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static SecretKey getKey(String message) throws Exception {
String messageToUpperCase = message.toUpperCase();
byte[] digestOfPassword = messageToUpperCase.getBytes();
byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
SecretKey key = new SecretKeySpec(keyBytes, "DESede");
return key;
}
}
Esta es descifrar
public class Decryptor {
public static void main(String[] args) {
try {
File inputFileNAme = new File("d:/Secret.file");
FileInputStream fileInputStream = new FileInputStream(inputFileNAme);
FileOutputStream fileOutputStream = new FileOutputStream(outputFilePath);
SecretKey secretKey = getKey(keyString);
Cipher cipher = Cipher.getInstance(algorithm);
cipher.init(Cipher.DECRYPT_MODE, secretKey);
ObjectInputStream objectInputStream = new ObjectInputStream
(new CipherInputStream(fileInputStream, cipher));
System.out.println(objectInputStream.available());
while (objectInputStream.available() != 0) {
fileOutputStream.write((Integer) objectInputStream.readObject());
System.out.println(objectInputStream.readObject());
}
fileOutputStream.flush();
fileOutputStream.close();
fileInputStream.close();
objectInputStream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
public static SecretKey getKey(String message) throws Exception {
String messageToUpperCase = message.toUpperCase();
byte[] digestOfPassword = messageToUpperCase.getBytes();
byte[] keyBytes = Arrays.copyOf(digestOfPassword, 24);
SecretKey key = new SecretKeySpec(keyBytes, "DESede");
return key;
}
}