U5KYJSJx

1public void encrypt ()
2{
3    byte[] input = w.getSprites().toString().getBytes(); // Data to be encrypted
4    byte[] encrypted = null; // Encrypted output
5    Cipher cipher; // Cipher algorithm to be used
6
7    try {
8
9        // Setup the cipher algorithm to use and select the wanted mode
10        // AES is the cipher algorithm GCM is the mode
11        cipher = Cipher.getInstance("AES/GCM/NoPadding");
12
13        // Generate a random key for the encryption
14        KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
15        keyGenerator.init(256);
16        SecretKey key = keyGenerator.generateKey();
17
18        // Generate a random iv for the encryption
19        SecureRandom randomSecureRandom = new SecureRandom();
20        byte[] iv = new byte[cipher.getBlockSize()];
21        randomSecureRandom.nextBytes(iv);
22
23        // Encrypt the data
24        cipher.init(Cipher.ENCRYPT_MODE, key, randomSecureRandom);
25        encrypted = new byte[cipher.getOutputSize(input.length)];
26        int enc_len = cipher.update(input, 0, input.length, encrypted, 0);
27        enc_len += cipher.doFinal(encrypted, enc_len);
28    }
29    catch (NoSuchAlgorithmException | 
30           NoSuchPaddingException | 
31           InvalidKeyException | 
32           ShortBufferException | 
33           IllegalBlockSizeException | 
34           BadPaddingException e) { e.printStackTrace(); }
35
36    FileHandle f = Gdx.files.local("bin/default/saves/default/test.txt");
37    f.writeString(encrypted.toString(), false);
38}