.net URL加密和解密
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Security.Cryptography;
using System.IO;
using System.Text;
/// <summary>
/// Class1 的摘要说明
/// </summary>
public class Security
{
#region 加密Key
string _QueryStringKey = "12345678"; //URL传输参数加密Key这个key可以自己设置支持8位这个东西很重要的
#endregion
#region 加密算法
/// <summary>
/// 加密算法
/// </summary>
/// <param name="QueryString"></param>
/// <returns></returns>
public string EncryptQueryString(string QueryString)
{
return Encrypt(QueryString, _QueryStringKey);
}
#endregion
#region 解密算法
/// <summary>
/// 解密算法
/// </summary>
/// <param name="QueryString"></param>
/// <returns></returns>
public string DecryptQueryString(string QueryString)
{
return Decrypt(QueryString, _QueryStringKey);
}
#endregion
public string Encrypt(string pToEncrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider(); //把字符串放到byte数组中
byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); //建立加密对象的密钥和偏移量
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey); //原文使用ASCIIEncoding.ASCII方法的GetBytes方法
MemoryStream ms = new MemoryStream(); //使得输入密码必须输入英文文本
CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
{
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return ret.ToString();
}
public string Decrypt(string pToDecrypt, string sKey)
{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
des.Key = ASCIIEncoding.ASCII.GetBytes(sKey); //建立加密对象的密钥和偏移量，此值重要，不能修改
des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
MemoryStream ms = new MemoryStream();
CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
StringBuilder ret = new StringBuilder(); //建立StringBuild对象，CreateDecrypt使用的是流对象，必须把解密后的文本变成流对象
return System.Text.Encoding.Default.GetString(ms.ToArray());
}
public bool ValidateString(string EnString, string FoString, int Mode)
{
switch (Mode)
{
default:
case 1:
if (Decrypt(EnString, _QueryStringKey) == FoString.ToString())
{
return true;
}
else
{
return false;
}
}
}
}
