using System;
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using System.Security.Cryptography;
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using System.IO;
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using System.Text;
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namespace Company.BLL
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{
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/**//// <summary>
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/// 此類用來加密與解密存在於URL中的參數
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/// Create by sp
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/// </summary>
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public class IaskUrlEncode
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{
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public IaskUrlEncode()
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{
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//
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// TODO: 在此處添加構造函數邏輯
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//
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}
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string _QueryStringKey= "abcdefgh"; //URL傳輸參數加密Key
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string _PassWordKey = "hgfedcba";//PassWord加密Key
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公共方法#region 公共方法
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/**//// <summary>
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/// 加密URL傳輸的字符串
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/// </summary>
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/// <param name="QueryString"></param>
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/// <returns></returns>
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public string EncryptQueryString(string QueryString)
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{
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return Encrypt(QueryString, _QueryStringKey);
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}
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/**//// <summary>
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/// 解密URL傳輸的字符串
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/// </summary>
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/// &name="QueryString"></param>
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/// <returns></returns>
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public string DecryptQueryString(string QueryString)
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{
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return Decrypt(QueryString, _QueryStringKey);
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}
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/**//// <summary>
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/// 加密帳號口令
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/// </summary>
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/// <param name="PassWord"></param>
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/// <returns></returns>
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private string EncryptPassWord(string PassWord)
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{
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return Encrypt(PassWord, _PassWordKey);
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}
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/**//// <summary>
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/// 解密帳號口令
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/// </summary>
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/// <param name="PassWord"></param>
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/// <returns></returns>
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private string DecryptPassWord(string PassWord)
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{
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return Decrypt(PassWord, _PassWordKey);
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}
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#endregion
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加密過程#region 加密過程
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/**//// <summary>
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/// DEC 加密過程
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/// </summary>
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/// <param name="pToEncrypt"></param>
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/// <param name="sKey"></param>
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/// <returns></returns>
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private string Encrypt(string pToEncrypt, string sKey)
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{
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DESCryptoServiceProvider des = new DESCryptoServiceProvider();//把字符串放到byte數組中
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byte[] inputByteArray = Encoding.Default.GetBytes(pToEncrypt);
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des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);//建立加密對象的密鑰和偏移量
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des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);//原文使用ASCIIEncoding.ASCII方法的GetBytes方法
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MemoryStream ms = new MemoryStream();//使得輸入密碼必須輸入英文文本
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CryptoStream cs = new CryptoStream(ms, des.CreateEncryptor(), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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StringBuilder ret = new StringBuilder();
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foreach (byte b in ms.ToArray())
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{
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ret.AppendFormat("{0:X2}", b);
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}
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ret.ToString();
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return ret.ToString();
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}
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#endregion
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解密過程#region 解密過程
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/**//// <summary>
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/// DEC 解密過程
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/// </summary>
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/// <param name="pToDecrypt"></param>
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/// <param name="sKey"></param>
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/// <returns></returns>
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private string Decrypt(string pToDecrypt, string sKey)
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{
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DESCryptoServiceProvider des = new DESCryptoServiceProvider();
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byte[] inputByteArray = new byte[pToDecrypt.Length / 2];
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for (int x = 0; x < pToDecrypt.Length / 2; x++)
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{
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int i = (Convert.ToInt32(pToDecrypt.Substring(x * 2, 2), 113
inputByteArray[x] = (byte)i;
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}
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des.Key = ASCIIEncoding.ASCII.GetBytes(sKey);//建立加密對象的密鑰和偏移量，此值重要，不能修改
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des.IV = ASCIIEncoding.ASCII.GetBytes(sKey);
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MemoryStream ms = new MemoryStream();
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CryptoStream cs = new CryptoStream(ms, des.CreateDecryptor(), CryptoStreamMode.Write);
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cs.Write(inputByteArray, 0, inputByteArray.Length);
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cs.FlushFinalBlock();
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StringBuilder ret = new StringBuilder();//建立StringBuilder對象，CreateDecrypt使用的是流對象，必須把解密後的文本變成流對象
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return System.Text.Encoding.Default.GetString(ms.ToArray());
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}
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#endregion
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匹配過程#region 匹配過程
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/**//// <summary>
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/// 檢查己加密的字符串是否與原文相同
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/// </summary>
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/// <param name="EnString"></param>
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/// <param name="FoString"></param>
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/// <param name="Mod
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/// <returns></returns>
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private bool ValidateString(string EnString, string FoString, int Mode)
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{
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switch (Mode)
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{
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default:
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case 1:
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if (Decrypt(EnString, _QueryStringKey) == FoString.ToString())
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{
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return true;
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}
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else
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{
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return false;
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}
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case 2:
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if (Decrypt(EnString, _PassWordKey) == FoString.ToString())
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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}
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#endregion
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}
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}
