Advertisement
Not a member of Pastebin yet?
Sign Up,
it unlocks many cool features!
- import java.io.ObjectInputStream.GetField;
- import java.security.MessageDigest;
- import java.security.SecureRandom;
- import java.security.spec.AlgorithmParameterSpec;
- import javax.crypto.Cipher;
- import javax.crypto.spec.IvParameterSpec;
- import javax.crypto.spec.SecretKeySpec;
- import javax.xml.bind.DatatypeConverter;
- public class AESCrypt {
- private final Cipher cipher;
- private final SecretKeySpec key;
- private String encryptedText, decryptedText;
- //private AlgorithmParameterSpec ivspec;
- public AESCrypt(String password) throws Exception {
- // hash password with SHA-256 and crop the output to 128-bit for key
- MessageDigest digest = MessageDigest.getInstance("SHA-256");
- digest.update(password.getBytes("UTF-8"));
- byte[] keyBytes = new byte[16];
- System.arraycopy(digest.digest(), 0, keyBytes, 0, keyBytes.length);
- cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
- key = new SecretKeySpec(keyBytes, "AES");
- //byte[] iv = new byte[cipher.getBlockSize()];
- //ivspec = new IvParameterSpec(iv);
- getIV();
- }
- public AlgorithmParameterSpec getIV() {
- AlgorithmParameterSpec ivspec;
- byte[] iv = new byte[cipher.getBlockSize()];
- new SecureRandom().nextBytes(iv);
- ivspec = new IvParameterSpec(iv);
- return ivspec;
- }
- public String encrypt(String plainText) throws Exception {
- cipher.init(Cipher.ENCRYPT_MODE, key, getIV());
- byte[] encrypted = cipher.doFinal(plainText.getBytes());
- encryptedText = DatatypeConverter.printBase64Binary(encrypted);
- return encryptedText;
- }
- public String decrypt(String cryptedText) throws Exception {
- cipher.init(Cipher.DECRYPT_MODE, key, getIV());
- byte[] bytes = DatatypeConverter.parseBase64Binary(cryptedText);
- byte[] decrypted = cipher.doFinal(bytes);
- decryptedText = new String(decrypted, "UTF-8");
- return decryptedText;
- }
- public static void main(String[] args) throws Exception {
- System.out.print("....AES....\n");
- String message = "DOBOJ";
- String password = "PASSWORD";
- System.out.println("MSG:" + message);
- AESCrypt aes = new AESCrypt(password);
- String encryptedText = aes.encrypt(message).toString();
- System.out.println("ENCRYPTED MSG: " + encryptedText);
- String decryptedText = aes.decrypt(encryptedText);
- System.out.print("DECRYPTED MSG: " + decryptedText);
- }
- }
Advertisement
Add Comment
Please, Sign In to add comment
Advertisement