AES加密解密

 1     public class AESEncryption
 2     {
 3         #region 加密
 4         /// <summary>
 5         /// 加密
 6         /// </summary>
 7         /// <param name="input">需要加密的字符串</param>
 8         /// <param name="iv">向量</param>
 9         /// <param name="key">密钥</param>
10         /// <returns>加密后base64编码字符串</returns>
11         public static String Encrypt(String input, String iv, String key)
12         {
13             Byte[] keyBytes = Convert.FromBase64String(key);
14             Byte[] ivBytes = Convert.FromBase64String(iv);
15             using (RijndaelManaged rm = new RijndaelManaged())
16             {
17                 rm.Key = keyBytes;
18                 rm.IV = ivBytes;
19                 ICryptoTransform encryptor = rm.CreateEncryptor(rm.Key, rm.IV);
20                 using (MemoryStream msEncrypt = new MemoryStream())
21                 {
22                     using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
23                     {
24                         using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
25                         {
26                             swEncrypt.Write(input);
27                         }
28                         Byte[] encrypted = msEncrypt.ToArray();
29                         return Convert.ToBase64String(encrypted);
30                     }
31                 }
32             }
33         } 
34         #endregion
35 
36         #region 解密
37         /// <summary>
38         /// 解密
39         /// </summary>
40         /// <param name="input">需要解密的字符串</param>
41         /// <param name="iv">向量</param>
42         /// <param name="key">密钥</param>
43         /// <returns>加密之后的字符串</returns>
44         public static String Decrypt(String input, String iv, String key)
45         {
46             Byte[] inputBytes = Convert.FromBase64String(input);
47             Byte[] keyBytes = Convert.FromBase64String(key);
48             Byte[] ivBytes = Convert.FromBase64String(iv);
49             using (RijndaelManaged rm = new RijndaelManaged())
50             {
51                 rm.Key = keyBytes;
52                 rm.IV = ivBytes;
53                 ICryptoTransform decryptor = rm.CreateDecryptor(rm.Key, rm.IV);
54                 using (MemoryStream msDecrypt = new MemoryStream(inputBytes))
55                 {
56                     using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
57                     {
58                         using (StreamReader srDecrypt = new StreamReader(csDecrypt))
59                         {
60                             return srDecrypt.ReadToEnd();
61                         }
62                     }
63                 }
64             }
65         } 
66         #endregion
67     }