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1public static String key = "aaaaaaaabbccccbbaaaaaaaabbccccbb";
2    private static byte[] key_Array = Base64.decode(key,Base64.DEFAULT);
3
4    public static String encrypt(String plainText)
5    {
6        try
7        {
8            Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
9
10            // Initialization vector.
11            // It could be any value or generated using a random number generator.
12            byte[] iv = { 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 7, 7, 7, 7 };
13            IvParameterSpec ivspec = new IvParameterSpec(iv);
14
15            Key secretKey = new SecretKeySpec(key_Array, "AES");
16            cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivspec);
17
18            return Base64.encodeToString(cipher.doFinal(plainText.getBytes()),Base64.DEFAULT);
19        }
20        catch (Exception e)
21        {
22            System.out.println("[Exception]:"+e.getMessage());
23        }
24        return null;
25    }
26
27    public static String decrypt(String encryptedMessage)
28    {
29        try
30        {
31            //Cipher _Cipher = Cipher.getInstance("AES");
32            //Cipher _Cipher = Cipher.getInstance("AES/ECB/PKCS5PADDING");
33            Cipher _Cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");
34
35            // Initialization vector.
36            // It could be any value or generated using a random number generator.
37            byte[] iv = { 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 7, 7, 7, 7 };
38            IvParameterSpec ivspec = new IvParameterSpec(iv);
39
40            Key SecretKey = new SecretKeySpec(key_Array, "AES");
41            _Cipher.init(Cipher.DECRYPT_MODE, SecretKey, ivspec);
42
43            byte decodedMessage[] = Base64.decode(encryptedMessage,Base64.DEFAULT);
44            return new String(_Cipher.doFinal(decodedMessage));
45
46        }
47        catch (Exception e)
48        {
49            System.out.println("[Exception]:"+e.getMessage());
50
51        }
52        return null;
53    } 
54     
55public class Crypt
56    {
57        // C# Code, CipherMode.CBC
58        // CBC version need Initialization vector IV.
59
60        public static string keyStr = "aaaaaaaabbccccbbaaaaaaaabbccccbb";
61                                      // FFClY170hLrhsDnKUEhJ4FhVOnrpNNFFClY170hLrhsDnKUE
62        public static string Encrypt(string PlainText)
63        {
64            RijndaelManaged aes = new RijndaelManaged();
65            aes.BlockSize = 128;
66            aes.KeySize = 256;
67
68            // It is equal in java 
69            /// Cipher _Cipher = Cipher.getInstance("AES/CBC/PKCS5PADDING");    
70            aes.Mode = CipherMode.CBC;
71            aes.Padding = PaddingMode.PKCS7;
72
73            byte[] keyArr = Convert.FromBase64String(keyStr);
74            byte[] KeyArrBytes32Value = new byte[32];
75            Array.Copy(keyArr, KeyArrBytes32Value, 24);
76
77            // Initialization vector.   
78            // It could be any value or generated using a random number generator.
79            byte[] ivArr = { 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 7, 7, 7, 7 };
80            byte[] IVBytes16Value = new byte[16];
81            Array.Copy(ivArr, IVBytes16Value, 16);
82
83            aes.Key = KeyArrBytes32Value;
84            aes.IV = IVBytes16Value;
85
86            ICryptoTransform encrypto = aes.CreateEncryptor();
87
88            byte[] plainTextByte = ASCIIEncoding.UTF8.GetBytes(PlainText);
89            byte[] CipherText = encrypto.TransformFinalBlock(plainTextByte, 0, plainTextByte.Length);
90            return Convert.ToBase64String(CipherText);
91
92        }
93
94        public static string Decrypt(string CipherText)
95        {
96            RijndaelManaged aes = new RijndaelManaged();
97            aes.BlockSize = 128;
98            aes.KeySize = 256;
99
100            aes.Mode = CipherMode.CBC;
101            aes.Padding = PaddingMode.PKCS7;
102
103            byte[] keyArr = Convert.FromBase64String(keyStr);
104            byte[] KeyArrBytes32Value = new byte[32];
105            Array.Copy(keyArr, KeyArrBytes32Value, 24);
106
107            // Initialization vector.   
108            // It could be any value or generated using a random number generator.
109            byte[] ivArr = { 1, 2, 3, 4, 5, 6, 6, 5, 4, 3, 2, 1, 7, 7, 7, 7 };
110            byte[] IVBytes16Value = new byte[16];
111            Array.Copy(ivArr, IVBytes16Value, 16);
112
113            aes.Key = KeyArrBytes32Value;
114            aes.IV = IVBytes16Value;
115
116            ICryptoTransform decrypto = aes.CreateDecryptor();
117
118            byte[] encryptedBytes = Convert.FromBase64CharArray(CipherText.ToCharArray(), 0, CipherText.Length);
119            byte[] decryptedData = decrypto.TransformFinalBlock(encryptedBytes, 0, encryptedBytes.Length);
120            return ASCIIEncoding.UTF8.GetString(decryptedData);
121        }
122    }