Url 加密解密

using System;
using System.Collections.Generic;
using System.Web;
using System.Text;
using System.Security.Cryptography;
using System.IO;

/// <summary>
///DESCryption 的摘要说明
/// </summary>
public class DESCryption
{

    private Byte[] key;
    private Byte[] IV = new Byte[] {0x12,0x34,0x56, 0x78, 0x90, 0xAB, 0xCD, 0xEF };

    /// <summary>
    /// 解密
    /// </summary>
    /// <param name="strToDecrypt"></param>
    /// <param name="strEncryptKey"></param>
    /// <returns></returns>
    public string Decrypt(string strToDecrypt,string strEncryptKey)
    {
      try
      {
          key = Encoding.UTF8.GetBytes(strEncryptKey.Substring(0, 8));
          Byte[] inputByteArray = Convert.FromBase64String(strToDecrypt);

          DESCryptoServiceProvider des = new DESCryptoServiceProvider();
          MemoryStream ms = new MemoryStream();
          CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(key, IV), CryptoStreamMode.Write);
          cs.Write(inputByteArray, 0, inputByteArray.Length);
          cs.FlushFinalBlock();

          return Encoding.UTF8.GetString(ms.ToArray());
      }
      catch (Exception ex)
      {
          return ex.Message;
      }
    }

    /// <summary>
    /// 加密
    /// </summary>
    /// <param name="strToEncrypt"></param>
    /// <param name="strEncryptKey"></param>
    /// <returns></returns>
    public string Encrypt(string strToEncrypt, string strEncryptKey)
    {       
        try
        {
            key = Encoding.UTF8.GetBytes(strEncryptKey.Substring(0, 8));
            Byte[] inputByteArray = Encoding.UTF8.GetBytes(strToEncrypt);

            DESCryptoServiceProvider des = new DESCryptoServiceProvider();
            MemoryStream ms = new MemoryStream();
            CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(key, IV), CryptoStreamMode.Write);
            cs.Write(inputByteArray, 0, inputByteArray.Length);
            cs.FlushFinalBlock();

            return Convert.ToBase64String(ms.ToArray());
        }
        catch (Exception ex)
        {
            return ex.Message;
        }
    }
}

调用:添加一页面,命名为EncryptURL.aspx,添加一按钮,代码如下.

 protected void Page_Load(object sender, EventArgs e)
    {
        if (Request["User"] != null)
        {
            DESCryption encrypt = new DESCryption();
            Response.Write(encrypt.Decrypt(Request["User"].ToString(),encryptKey));
        }
    }

    private string encryptKey = "#!12^0#@";
    private string userName = "张三";

    protected void Button1_Click(object sender, EventArgs e)
    {
        DESCryption encrypt = new DESCryption();
        Response.Redirect(string.Format("EncryptURL.aspx?User={0}",encrypt.Encrypt(userName,encryptKey)));
    }

 

本文来自优快云博客，转载请标明出处：http://blog.youkuaiyun.com/iStarSoft/archive/2009/07/19/4359081.aspx