5v538H9L

1    public static InputStream decompress(InputStream is) throws IOException {
2        byte[] compressed = Base64.decode(zipText);
3        if (is.available() > 4) {
4            return new BufferedInputStream(new GZIPInputStream(
5                    new ByteArrayInputStream(new Base64InputStream(is), 4, compressed.length - 4)));
6        } else {
7            return null;
8        }
9    }
10
11    public static String decrypt(InputStream is, String password)
12            throws Exception {
13
14        return decrypt(new Base64InputStream(is), password);
15    }
16
17    public static InputStream decrypt(InputStream is, String password) throws Exception {
18        byte[] passwordKey = encodeDigest(password);
19        try {
20            aesCipher = Cipher.getInstance(CIPHER_TRANSFORMATION);
21        } catch (NoSuchAlgorithmException e) {
22            throw new Exception(
23                    "Decryption Exception: No such algorithm\r\n" + e
24                            .toString());
25        } catch (NoSuchPaddingException e) {
26            throw new Exception(
27                    "Decryption Exception: No such padding PKCS5\r\n" + e
28                            .toString());
29        }
30        secretKey = new SecretKeySpec(passwordKey, CIPHER_ALGORITHM);
31
32        try {
33            aesCipher.init(Cipher.DECRYPT_MODE, secretKey, ivParameterSpec);
34        } catch (InvalidKeyException e) {
35            throw new Exception(
36                    "Decryption Exception: Invalid key\r\n" + e.toString());
37        } catch (InvalidAlgorithmParameterException e) {
38            throw new Exception(
39                    "Decryption Exception: Invalid algorithm\r\n" + e
40                            .toString());
41        }
42
43        CipherInputStream cis = new CipherInputStream(is, aesCipher);
44        try {
45            return new CipherInputStream(is, aesCipher);
46        } catch (IllegalBlockSizeException e) {
47            throw new Exception(
48                    "Decryption Exception: Illegal block size\r\n" + e
49                            .toString());
50        } catch (BadPaddingException e) {
51            throw new Exception(
52                    "Decryption Exception: Bad padding\r\n" + e
53                            .toString());
54        }
55    }
56
57    public EntMyClass getDatat(InputStream is) {
58        JsonReader r = null;
59        try {
60            Reader reader = new BufferedReader(new InputStreamReader(is));
61            r = new JsonReader(reader);
62            result = gson.fromJson(r, EntMyClass.class);
63        } finally {
64            if (null != r) {
65                r.close();
66            }
67        }
68    }