using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Security.Cryptography;
using?System.Text;
using?System.Threading.Tasks;
using?System.Windows.Forms;

namespace?加密
{
????public?partial?class?Form1?:?Form
????{

????????public?const?string?Key?=?“mallpark“;
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????///?

????????///?加密
????????///?

????????///?
????????///?
????????private?void?btnEn_Click（object?sender?EventArgs?e）
????????{
????????????
????????????txtDE.Text?=?Encrypt（txtEN.Text?Key）;
????????}

????????///?

????????///?解密
????????///?

????????///?
????????///?
????????private?void?button1_Click（object?sender?EventArgs?e）
????????{
????????????txtDE.Text?=?Decrypt（txtEN.Text?Key）;
????????}???

????????///?

????????///?進行DES加密。
????????///?

????????///?要加密的字符串。
????????///?密鑰，且必須為8位。
????????///?以base64格式返回的加密字符串。
????????string?Encrypt（string?pToEncrypt?string?sKey）
????????{
????????????if?（pToEncrypt?==?““）
????????????????return?““;
????????????try
????????????{
????????????????using?（DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider（））
????????????????{
????????????????????byte[]?inputByteArray?=?Encoding.UTF8.GetBytes（pToEncrypt）;
????????????????????des.Key?=?ASCIIEncoding.ASCII.GetBytes（sKey）;
????????????????????des.IV?=?ASCIIEncoding.ASCII.GetBytes（sKey）;
????????????????????System.IO.MemoryStream?ms?=?new?System.IO.MemoryStream（）;
????????????????????using?（CryptoStream?cs?=?new?CryptoStream（ms?des.CreateEncryptor（）?CryptoStreamMode.Write））
????????????????????{
????????????????????????cs.Write（inputByteArray?0?inputByteArray.Length）;
????????????????????????cs.FlushFinalBlock（）;
????????????????????????cs.Close（）;
????????????????????}
????????????????????string?str?=?Convert.Tobase64String（ms.ToArray（））;
????????????????????ms.Close（）;
????????????????????return?str;
????????????????}
????????????}
????????????catch
????????????{
????????????????return?“該字符串無法加密“;
????????????}
????????}

????????///?

????????///?進行DES解密。
????????///?

????????///?要解密的以base64
????????///?密鑰，且必須為8位。
????????///?已解密的字符串。
?????????string?Decrypt（string?pToDecrypt?string?sKey）
????????{
????????????if?（pToDecrypt?==?““）
????????????????return?““;
????????????try
????????????{
????????????????using?（DESCryptoServiceProvider?des?=?new?DESCryptoServiceProvider（））
????????????????{
????????????????????byte[]?inputByteArray?=?Convert.Frombase64String（pToDecrypt）;
?????????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????文件?????????167??2018-12-27?03:31??加密\App.config
?????目錄???????????0??2018-12-27?03:35??加密\bin\
?????文件????????3985??2018-12-27?03:31??加密\Form1.cs
?????文件????????4626??2018-12-27?03:31??加密\Form1.Designer.cs
?????文件????????5817??2018-12-27?03:31??加密\Form1.resx
?????目錄???????????0??2018-12-27?03:31??加密\obj\
?????目錄???????????0??2018-12-27?03:32??加密\obj\Debug\
?????文件?????????865??2018-12-27?03:32??加密\obj\Debug\DesignTimeResolveAssemblyReferences.cache
?????文件????????6825??2018-12-27?03:32??加密\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????目錄???????????0??2018-12-27?03:32??加密\obj\Debug\TempPE\
?????文件????????4608??2018-12-27?03:32??加密\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll
?????文件????????1185??2018-12-27?03:34??加密\obj\Debug\加解密.csproj.FileListAbsolute.txt
?????文件?????????977??2018-12-27?03:32??加密\obj\Debug\加解密.csproj.GenerateResource.Cache
?????文件????????2211??2018-12-27?03:32??加密\obj\Debug\加解密.csprojResolveAssemblyReference.cache
?????文件???????10752??2018-12-27?03:32??加密\obj\Debug\加密.exe
?????文件?????????180??2018-12-27?03:31??加密\obj\Debug\加密.Form1.resources
?????文件???????28160??2018-12-27?03:32??加密\obj\Debug\加密.pdb
?????文件?????????180??2018-12-27?03:31??加密\obj\Debug\加密.Properties.Resources.resources
?????文件?????????518??2018-12-27?03:31??加密\Program.cs
?????目錄???????????0??2018-12-27?03:31??加密\Properties\
?????文件????????1350??2018-12-27?03:31??加密\Properties\AssemblyInfo.cs
?????文件????????2852??2018-12-27?03:31??加密\Properties\Resources.Designer.cs
?????文件????????5612??2018-12-27?03:31??加密\Properties\Resources.resx
?????文件????????1106??2018-12-27?03:31??加密\Properties\Settings.Designer.cs
?????文件?????????249??2018-12-27?03:31??加密\Properties\Settings.settings
?????文件????????3857??2018-12-27?03:31??加密\加解密.csproj
?????文件????????3584??2018-12-27?03:35??加密\加解密.v12.suo