5B17cPun

1import android.util.Base64;
2
3import java.security.InvalidKeyException;
4import java.security.NoSuchAlgorithmException;
5
6import javax.crypto.BadPaddingException;
7import javax.crypto.Cipher;
8import javax.crypto.IllegalBlockSizeException;
9import javax.crypto.NoSuchPaddingException;
10import javax.crypto.spec.IvParameterSpec;
11import javax.crypto.spec.SecretKeySpec;
12import javax.inject.Inject;
13
14/**
15 * @author Created by Ahmed Mabrook , a.mabrok@yellow.com.eg on 9/15/15.
16 * @package com.yellow.eg.Utils
17 * @className MCrypt
18 * <br/> this class is used for encryption and decryption of any url
19 **/
20public class MCrypt {
21
22    private String iv = "m*w&h+e!p$X#b$h!";
23    private IvParameterSpec ivspec;
24    private SecretKeySpec keyspec;
25    private Cipher cipher;
26    private String mSecretKey = "Y@@LL00WK#Y**\0\0\0";
27    static private byte[] mNewKeyBytes;
28
29
30    @Inject
31    public MCrypt() {
32        ivspec = new IvParameterSpec(iv.getBytes());
33
34        try {
35            cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
36        } catch (NoSuchAlgorithmException e) {
37            e.printStackTrace();
38        } catch (NoSuchPaddingException e) {
39            e.printStackTrace();
40        }
41    }
42
43    public String encrypt(String text) {
44        return encrypt(text, mSecretKey);
45
46    }
47
48    public byte[] decrypt(String code) throws Exception {
49        if (code == null || code.length() == 0)
50            return null;
51
52        byte[] decrypted = null;
53
54        try {
55            cipher.init(Cipher.DECRYPT_MODE, keyspec, ivspec);
56
57            decrypted = cipher.doFinal(hexToBytes(code));
58        } catch (Exception e) {
59            throw new Exception("[decrypt] " + e.getMessage());
60        }
61        return decrypted;
62    }
63
64    public byte[] hexToBytes(String str) {
65        if (str == null) {
66            return null;
67        } else if (str.length() < 2) {
68            return null;
69        } else {
70            int len = str.length() / 2;
71            byte[] buffer = new byte[len];
72            for (int i = 0; i < len; i++) {
73                buffer[i] = (byte) Integer.parseInt(str.substring(i * 2, i * 2 + 2), 16);
74            }
75            return buffer;
76        }
77    }
78
79
80    /**
81     * @param input
82     * @param key
83     * @return String encrypted
84     */
85    public static String encrypt(String input, String key) {
86
87        byte[] crypted = null;
88
89            SecretKeySpec SecretKey = new SecretKeySpec(key.getBytes(), "AES");
90
91        try {
92            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
93            cipher.init(Cipher.ENCRYPT_MODE, SecretKey);
94            crypted = cipher.doFinal(input.getBytes());
95        } catch (InvalidKeyException e) {
96            e.printStackTrace();
97        } catch (IllegalBlockSizeException e) {
98            e.printStackTrace();
99        } catch (BadPaddingException e) {
100            e.printStackTrace();
101        } catch (NoSuchAlgorithmException e) {
102            e.printStackTrace();
103        } catch (NoSuchPaddingException e) {
104            e.printStackTrace();
105        }
106
107
108        String encrypted = Base64.encodeToString(crypted, Base64.DEFAULT);
109        return encrypted.replace('+', '-');
110
111
112    }
113
114
115    public static byte[] decrypt(String input, String key) {
116        byte[] output = null;
117        try {
118            SecretKeySpec skey = new SecretKeySpec(key.getBytes(), "AES");
119            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
120            cipher.init(Cipher.DECRYPT_MODE, skey);
121            //output = cipher.doFinal(Base64.decodeBase64(input.getBytes()));
122        } catch (Exception e) {
123            System.out.println(e.toString());
124        }
125        return output;  //new String(output);
126    }
127}