using System;
using System.Security.Cryptography;
using System.IO;
using System.Text;
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namespace SharpZipLib
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{
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/**////
/// Security 的摘要说明。
/// Security类实现.NET框架下的加密和解密。
/// CopyRight KangSoft@Hotmail.com@Hotmail.com@hotmail.com
///
public class Security
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{
string _QueryStringKey = "11111111"; //URL传输参数加密Key
string _PassWordKey = "22222222"; //PassWord加密Key
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public Security()
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{
//
// TODO: 在此处添加构造函数逻辑
//
}
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/**////
/// 加密URL传输的字符串
///
///
///
public string EncryptQueryString(string QueryString)
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{
return Encrypt(QueryString, _QueryStringKey);
}
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/**////
/// 解密URL传输的字符串
///
///
///
public string DecryptQueryString(string QueryString)
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{
return Decrypt(QueryString, _QueryStringKey);
}
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/**////
/// 加密帐号口令
///
///
///
public string EncryptPassWord(string PassWord)
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{
return Encrypt(PassWord, _PassWordKey);
}
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/**////
/// 解密帐号口令
///
///
///
public string DecryptPassWord(string PassWord)
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{
return Decrypt(PassWord, _PassWordKey);
}
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/**////
/// DEC 加密过程
///
///
///
///
public string Encrypt(string pToEncrypt, string sKey)
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{
DESCryptoServiceProvider des = new DESCryptoServiceProvider(); //把字符串放到byte数组中
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byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
//byte[] inputByteArray=Encoding.Unicode.GetBytes(pToEncrypt);
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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);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
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StringBuilder ret = new StringBuilder();
foreach (byte b in ms.ToArray())
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{
ret.AppendFormat("{0:X2}", b);
}
ret.ToString();
return ret.ToString();
}
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![](https://www.cnblogs.com/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**////
/// DEC 解密过程
///
///
///
///
public string Decrypt(string pToDecrypt, string sKey)
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{
DESCryptoServiceProvider des = new DESCryptoServiceProvider();
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byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
for (int x = 0; x < pToDecrypt.Length / 2; x++)
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{
int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 16));
inputByteArray[x] = (byte)i;
}
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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);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
cs.FlushFinalBlock();
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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
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return System.Text.Encoding.Default.GetString(ms.ToArray());
}
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/**////
/// 检查己加密的字符串是否与原文相同
///
///
///
///
///
public bool ValidateString(string EnString, string FoString, int Mode)
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{
switch (Mode)
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{
default:
case 1:
if (Decrypt(EnString, _QueryStringKey) == FoString.ToString())
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{
return true;
}
else
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{
return false;
}
case 2:
if (Decrypt(EnString, _PassWordKey) == FoString.ToString())
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{
return true;
}
else
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{
return false;
}
}
}
}
}
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Security sec = new Security();
string p= sec.EncryptQueryString("崔波"); //加密
string np = sec.DecryptQueryString(p); //解密
posted @
2008-07-05 14:48
melody&amp;amp;bobo
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