XA3dNNAw

1private static byte[] encryptPassword(byte[] buff) throws UnsupportedEncodingException, UnsupportedOperationException, InvalidKeySpecException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidParameterSpecException, ProviderException, InvalidAlgorithmParameterException {
2
3        JsonReader jr = new JsonReader(new InputStreamReader(new ByteArrayInputStream(buff), "UTF-8"));
4        JsonParser parser = new JsonParser();
5        JsonElement data = parser.parse(jr);
6        byte[] bt = null;
7
8        if (data.isJsonObject()) {
9
10            JsonObject json = data.getAsJsonObject();
11
12            if (json.has("msg")) {
13
14                JsonElement cmd = json.get("msg");
15                String msg = cmd.getAsString();
16                cmd = json.get("dst");
17                dst = cmd.getAsString();
18
19                Random r = new SecureRandom();
20                byte[] salt = new byte[20];
21                r.nextBytes(salt);
22                char[] password = pass1.toCharArray();
23
24                SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
25                KeySpec spec = new PBEKeySpec(password, salt, 65536, 128);
26                SecretKey tmp = factory.generateSecret(spec);
27                SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");
28
29                Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
30                cipher.init(Cipher.ENCRYPT_MODE, secret);
31                AlgorithmParameters params = cipher.getParameters();
32                byte[] iv = params.getParameterSpec(IvParameterSpec.class).getIV();
33                byte[] ciphertext = cipher.doFinal(msg.getBytes("UTF-8"));
34                byte[] secretArray = secret.getEncoded();
35
36                //encriptação da chave
37                //byte[] b = encryptPwd(secretArray);
38                String saltBase64 = Base64.encode(salt);
39                String cipherBase64 = Base64.encode(ciphertext);
40                String secretBase64 = Base64.encode(secretArray);
41                String ivBase64 = Base64.encode(iv);
42                json.remove("msg");
43                json.addProperty("msg", cipherBase64);
44                json.addProperty("key", secretBase64);
45                json.addProperty("iv", ivBase64);
46                json.addProperty("salt", saltBase64);
47                json.addProperty("type", 0);
48                bt = json.toString().getBytes();
49                return bt;
50            }
51        }
52        return buff;
53    }
54
55    private static byte[] decryptPassword(byte[] dados) throws UnsupportedEncodingException, UnsupportedOperationException, InvalidKeySpecException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, BadPaddingException, IllegalBlockSizeException, InvalidParameterSpecException, ProviderException, InvalidAlgorithmParameterException {
56
57        JsonReader jr = new JsonReader(new InputStreamReader(new ByteArrayInputStream(dados), "UTF-8"));
58        JsonParser parser = new JsonParser();
59        JsonElement data = parser.parse(jr);
60        byte[] bt = null;
61
62        if (data.isJsonObject()) {
63            JsonObject json = data.getAsJsonObject();
64            if (json.has("msg")) {
65                JsonElement cmd = json.get("msg");
66                String msg = cmd.getAsString();
67                cmd = json.get("iv");
68                
69                String iv = cmd.getAsString();
70                cmd = json.get("salt");
71                String saltEnc = cmd.getAsString();
72                byte[] saltDec = Base64.decode(saltEnc);
73                SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");
74                char[] password = pass1.toCharArray();
75                KeySpec spec = new PBEKeySpec(password, saltDec, 65536, 128);
76                SecretKey tmp = factory.generateSecret(spec);
77                SecretKey secret = new SecretKeySpec(tmp.getEncoded(), "AES");
78
79//                SecretKeySpec sks = new SecretKeySpec(Base64.decode(secret), "AES");
80                Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
81                cipher.init(Cipher.DECRYPT_MODE, secret, new IvParameterSpec(Base64.decode(iv)));
82                String plaintext = new String(cipher.doFinal(Base64.decode(msg)), "UTF-8");
83                json.remove("msg");
84                json.addProperty("msg", plaintext);
85                bt = json.toString().getBytes();
86                return bt;
87            }
88        }
89        return dados;
90    }