1using System;
 2using System.IO;
 3using System.Security.Cryptography;
 4
 5/**//// <summary>
 6/// Mydes 的摘要说明
 7/// </summary>
 8public class Mydes
 9...{
10    const string KEY_64 = "VavicApp";
11    const string IV_64 = "VavicApp"; //
12
13    public Mydes()
14    ...{
15        //
16        // TODO: 在此处添加构造函数逻辑
17        //欢迎各位测试，并提出宝贵意见
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21//    -------------------------------------------------------------------------------------------------
22
23//业务联系：
24
25//QQ咨询405098219 100108980
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27//E-mail:webhww@126.com  
28    }
29    public static string Encode(string data)
30    ...{
31        byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
32        byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
33
34        DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
35        int i = cryptoProvider.KeySize;
36        MemoryStream ms = new MemoryStream();
37        CryptoStream CSt = new CryptoStream(ms, cryptoProvider.CreateEncryptor(byKey, byIV), CryptoStreamMode.Write);
38
39        StreamWriter sw = new StreamWriter(CSt);
40        sw.Write(data);
41        sw.Flush();
42        CSt.FlushFinalBlock();
43        sw.Flush();
44        return Convert.ToBase64String(ms.GetBuffer(), 0, (int)ms.Length);
45
46    }
47    public static string Decode(string data)
48    ...{
49        byte[] byKey = System.Text.ASCIIEncoding.ASCII.GetBytes(KEY_64);
50        byte[] byIV = System.Text.ASCIIEncoding.ASCII.GetBytes(IV_64);
51
52        byte[] byEnc;
53        try
54        ...{
55            byEnc = Convert.FromBase64String(data);
56        }
57        catch
58        ...{
59            return null;
60        }
61
62        DESCryptoServiceProvider cryptoProvider = new DESCryptoServiceProvider();
63        MemoryStream ms = new MemoryStream(byEnc);
64        CryptoStream CSt = new CryptoStream(ms, cryptoProvider.CreateDecryptor(byKey, byIV), CryptoStreamMode.Read);
65        StreamReader sr = new StreamReader(CSt);
66        return sr.ReadToEnd();
67    }
68
69}
70