当前文件： 51Job/App_Code/CommonComponent/Encrypt.cs[2K，2009-6-12 11:31:08]，打开代码结构图

		            
 1using System;
 2using System.Text;
 3using System.IO;
 4using System.Security.Cryptography;
 5//该源码下载自www.51aspx.com(５1ａｓｐｘ．ｃｏｍ)
 6
 7namespace HRManager.CommonComponent
 8...{
 9    /**//// <summary>
10    /// 字符串加密、解密类，利用DES算法
11    /// </summary>
12    public class myEncrypt
13    ...{
14        private static byte[] key = new byte[] ...{ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
15        private static byte[] iv = new byte[] ...{ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
16
17        /**//// <summary>
18        /// 加密
19        /// </summary>
20        /// <param name="notEncryptStr">待加密的明文字符串</param>
21        /// <returns>加密后的字符串</returns>
22        public static string EncryptString(string notEncryptStr)
23        ...{
24            //初始化加密器生成器
25            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
26
27            byte[] byteNotEncrypt = Encoding.UTF8.GetBytes(notEncryptStr);//将字符串转换成字节
28            MemoryStream encryptMs = new MemoryStream();//创建内存数据流
29            CryptoStream encryptCs = new CryptoStream(encryptMs, des.CreateEncryptor(key,iv), CryptoStreamMode.Write);//创建加密器
30
31            //加密数据
32            encryptCs.Write(byteNotEncrypt, 0, byteNotEncrypt.Length);//将字节加密并写入内存
33            encryptCs.FlushFinalBlock();//将缓存中的数据写入内存
34            encryptMs.Seek(0, SeekOrigin.Begin);//回到内存流开始的位置
35
36            //将加密后的数据读取出来
37            byte[] byteEncrypt = new byte[1024];
38            int i = encryptMs.Read(byteEncrypt, 0, 1024);
39
40            encryptCs.Close();
41
42            //将加密后的字节转换为BASE64编码
43            string decryptStr = Convert.ToBase64String(byteEncrypt, 0, i);
44            return decryptStr;
45        }
46
47        void test()
48        ...{
49            string str1 = "Hello";
50            string str2 = myEncrypt.EncryptString(str1);
51        }
52
53        /**//// <summary>
54        /// 解密
55        /// </summary>
56        /// <param name="decryptStr">待解密的密文字符串</param>
57        /// <returns>解密后的字符串</returns>
58        public static string DecryptString(string decryptStr)
59        ...{
60            //初始化解密器生成器
61            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
62
63
64            byte[] byteNotDecrypt = Convert.FromBase64String(decryptStr);//将加密后的BASE64编码的字符串转换成字节
65            MemoryStream decryptMs = new MemoryStream(byteNotDecrypt);//创建内存数据流
66            CryptoStream decryptCs = new CryptoStream(decryptMs, des.CreateDecryptor(key, iv), CryptoStreamMode.Read);//创建解密器
67
68            //解密数据
69            byte[] byteDecrypt = new byte[1024];
70            int i = decryptCs.Read(byteDecrypt, 0, 1024);
71            decryptCs.Close();
72
73            //将解密后的字节转换为BASE64编码
74            string notEncryptStr = Encoding.UTF8.GetString(byteDecrypt, 0, i);
75            return notEncryptStr;
76        }
77    }
78}
79