怎么实现Web系统URL传输(表单提交)参数加密-zhuan
using System.Security.Cryptography;
using System.IO;
using System.Text;
namespace EIP.Framework
{
///
/// 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
{
string _QueryStringKey = "abcdefgh"; //URL传输参数加密Key
string _PassWordKey = "hgfedcba"; //PassWord加密Key
public Security()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
///
/// 加密URL传输的字符串
///
///
///
public string EncryptQueryString(string QueryString)
{
return Encrypt(QueryString,_QueryStringKey);
}
///
/// 解密URL传输的字符串
///
///
///
public string DecryptQueryString(string QueryString)
{
return Decrypt(QueryString,_QueryStringKey);
}
///
/// 加密帐号口令
///
///
///
public string EncryptPassWord(string PassWord)
{
return Encrypt(PassWord,_PassWordKey);
}
///
/// 解密帐号口令
///
///
///
public string DecryptPassWord(string PassWord)
{
return Decrypt(PassWord,_PassWordKey);
}
///
/// DEC 加密过程
///
///
///
///
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);
//byte[] inputByteArray=Encoding.Unicode.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();
}
///
/// DEC 解密过程
///
///
///
///
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());
}
///
/// 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)
{
switch (Mode)
{
default:
case 1:
if (Decrypt(EnString,_QueryStringKey) == FoString.ToString())
{
return true;
}
else
{
return false;
}
case 2:
if (Decrypt(EnString,_PassWordKey) == FoString.ToString())
{
return true;
}
else
{
return false;
}
}
}
}
}
网上很多人在问怎么实现Web系统URL传输(表单提交)参数加密。例如:要进行一个用户帐号编辑,要传递用户的ID,URL如下:http://localhost/mysystem/editAccounts.aspx?ID=2
但又不想让别人知道这个用户的ID为2,恶意的使用者可能还会将2修改,改为别的用户ID。
加密传递的参数值可以解决问题。
以下是自己写的DEC加密、解密的基类。
文件名:Security.CS
using System;
using System.Security.Cryptography;
using System.IO;
using System.Text;
namespace EIP.Framework
{
///
/// 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
{
string _QueryStringKey = "abcdefgh"; //URL传输参数加密Key
string _PassWordKey = "hgfedcba"; //PassWord加密Key
public Security()
{
//
// TODO: 在此处添加构造函数逻辑
//
}
///
/// 加密URL传输的字符串
///
///
///
public string EncryptQueryString(string QueryString)
{
return Encrypt(QueryString,_QueryStringKey);
}
///
/// 解密URL传输的字符串
///
///
///
public string DecryptQueryString(string QueryString)
{
return Decrypt(QueryString,_QueryStringKey);
}
///
/// 加密帐号口令
///
///
///
public string EncryptPassWord(string PassWord)
{
return Encrypt(PassWord,_PassWordKey);
}
///
/// 解密帐号口令
///
///
///
public string DecryptPassWord(string PassWord)
{
return Decrypt(PassWord,_PassWordKey);
}
///
/// DEC 加密过程
///
///
///
///
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);
//byte[] inputByteArray=Encoding.Unicode.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();
}
///
/// DEC 解密过程
///
///
///
///
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());
}
///
/// 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)
{
switch (Mode)
{
default:
case 1:
if (Decrypt(EnString,_QueryStringKey) == FoString.ToString())
{
return true;
}
else
{
return false;
}
case 2:
if (Decrypt(EnString,_PassWordKey) == FoString.ToString())
{
return true;
}
else
{
return false;
}
}
}
}
}
类中URL及帐号加密使用了不同的KEY。调用URL加密过程如下:
EIP.Framework.Security objSecurity = new EIP.Framework.Security();
objSecurity.EncryptQueryString(''待加密的字符串'');
解密:objSecurity.DecryptQueryString(''传递过来的参数);