C# 对密码等数据进行对称性加密解密

类：

 1 /// <summary>
 2 /// DESEncrypt加密解密算法。
 3 /// </summary>
 4 public class DESEncrypt
 5 {
 6         private DESEncrypt()
 7         {
 8             //
 9             // TODO: 在此处添加构造函数逻辑
10             //
11         }
12         
13         //自定义口令
14         private static string key = "XluK7kDuA9yptTks";
15 
16         /// <summary>
17         /// 对称加密解密的密钥
18         /// </summary>
19         public static string Key
20         {
21             get
22             {
23                 return key;
24             }
25             set
26             {
27                 key = value;
28             }
29         }
30 
31         /// <summary>
32         /// DES加密
33         /// </summary>
34         /// <param name="encryptString"></param>
35         /// <returns></returns>
36         public static string DesEncrypt(string encryptString)
37         {
38             try
39             {
40                 byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
41                 byte[] keyIV = keyBytes;
42                 byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
43                 DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
44                 MemoryStream mStream = new MemoryStream();
45                 CryptoStream cStream = new CryptoStream(mStream, provider.CreateEncryptor(keyBytes, keyIV), CryptoStreamMode.Write);
46                 cStream.Write(inputByteArray, 0, inputByteArray.Length);
47                 cStream.FlushFinalBlock();
48                 return Convert.ToBase64String(mStream.ToArray());
49             }
50             catch (Exception)
51             {
52                 return "";
53             }
54         }
55 
56         /// <summary>
57         /// DES解密
58         /// </summary>
59         /// <param name="decryptString"></param>
60         /// <returns></returns>
61         public static string DesDecrypt(string decryptString)
62         {
63             try
64             {
65                 byte[] keyBytes = Encoding.UTF8.GetBytes(key.Substring(0, 8));
66                 byte[] keyIV = keyBytes;
67                 byte[] inputByteArray = Convert.FromBase64String(decryptString);
68                 DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
69                 MemoryStream mStream = new MemoryStream();
70                 CryptoStream cStream = new CryptoStream(mStream, provider.CreateDecryptor(keyBytes, keyIV), CryptoStreamMode.Write);
71                 cStream.Write(inputByteArray, 0, inputByteArray.Length);
72                 cStream.FlushFinalBlock();
73                 return Encoding.UTF8.GetString(mStream.ToArray());
74             }
75             catch (Exception)
76             {
77                 return "";
78             }
79         }
80     }

View Code

调用：

1 //加密
2 string account=DESEncrypt.DesEncrypt(“account”);
3 //解密
4 account=DESEncrypt.DesDecrypt(account);

View Code