c# Des加密解密 

 1 using System;
 2 using System.Collections.Generic;
 3 using System.IO;
 4 using System.Linq;
 5 using System.Security.Cryptography;
 6 using System.Text;
 7 
 8 namespace Des加密
 9 {
10     public static class DesClass
11     {
12         /// <summary>
13         /// des加密类
14         /// </summary>
15         /// <param name="encryptString">待加密字符</param>
16         /// <param name="key">加密所需  Key</param>
17         /// <param name="iv">加密所需  IV</param>
18         /// <returns>加密后的结果</returns>
19         public static string DesEncrypt(string encryptString, string key, string iv)
20         {
21             try
22             {
23                 byte[] rgbKey = Encoding.UTF8.GetBytes(key);
24                 byte[] rgbIV = Encoding.UTF8.GetBytes(iv);
25                 byte[] inputByteArray = Encoding.UTF8.GetBytes(encryptString);
26                 DESCryptoServiceProvider dCSP = new DESCryptoServiceProvider();
27                 MemoryStream mStream = new MemoryStream();
28                 CryptoStream cStream = new CryptoStream(mStream, dCSP.CreateEncryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
29                 cStream.Write(inputByteArray, 0, inputByteArray.Length);
30                 cStream.FlushFinalBlock();
31                 return Convert.ToBase64String(mStream.ToArray());
32             }
33             catch
34             {
35                 return encryptString;
36             }
37         }
38 
39         /// <summary>
40         /// des解密类
41         /// </summary>
42         /// <param name="decryptString">待加密字符</param>
43         /// <param name="key">加密所需  Key</param>
44         /// <param name="iv">加密所需  IV</param>
45         /// <returns>解密后的结果</returns>
46         public static string DesDecrypt(string decryptString, string key, string iv)
47         {
48             try
49             {
50                 byte[] rgbKey = Encoding.UTF8.GetBytes(key);
51                 byte[] rgbIV = Encoding.UTF8.GetBytes(iv);
52                 byte[] inputByteArray = Convert.FromBase64String(decryptString);
53                 DESCryptoServiceProvider DCSP = new DESCryptoServiceProvider();
54                 MemoryStream mStream = new MemoryStream();
55                 CryptoStream cStream = new CryptoStream(mStream, DCSP.CreateDecryptor(rgbKey, rgbIV), CryptoStreamMode.Write);
56                 cStream.Write(inputByteArray, 0, inputByteArray.Length);
57                 cStream.FlushFinalBlock();
58                 return Encoding.UTF8.GetString(mStream.ToArray());
59             }
60             catch
61             {
62                 return decryptString;
63             }
64         }
65     }
66 }

 

posted @ 2014-09-21 23:17  以沫浅夏  阅读(310)  评论(0)    收藏  举报