using?Microsoft.Office.Interop.Excel;
using?NPOI.SS.UserModel;
using?System;
using?System.IO;
using?System.Security.Cryptography;
using?System.Text;
using?System.Threading;
using?System.Windows.Forms;

namespace?小田的工具箱
{
????public?partial?class?AES?:?Form
????{
????????public?AES（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?AES_Load（object?sender?EventArgs?e）
????????{
????????????comboBox1.Items.Add（“AES-ECB-128-PKCS7“）;
????????????comboBox1.SelectedIndex?=?0;
????????????textBox2.Text?=?“1234567890123456“;
????????}


????????public?static?string?Decrypt（string?toDecrypt?string?key）
????????{
????????????byte[]?keyArray?=?System.Text.Encoding.Default.GetBytes（key）;//UTF8Encoding.UTF8.GetBytes（key）;
????????????byte[]?toEncryptArray?=?HexStringToByteArray（toDecrypt）;?//Convert.Frombase64String（toDecrypt）;

????????????RijndaelManaged?rDel?=?new?RijndaelManaged（）;
????????????rDel.Key?=?keyArray;
????????????rDel.Mode?=?CipherMode.ECB;
????????????rDel.Padding?=?PaddingMode.PKCS7;

????????????ICryptoTransform?cTransform?=?rDel.CreateDecryptor（）;
????????????byte[]?resultArray?=?cTransform.TransformFinalBlock（toEncryptArray?0?toEncryptArray.Length）;

????????????return?ByteArrayToHexString（resultArray）;//UTF8Encoding.UTF8.GetString（resultArray）;
????????}

????????public?static?string?Encrypt（string?toDecrypt?string?key）
????????{
????????????byte[]?keyArray?=?System.Text.Encoding.Default.GetBytes（key）;//UTF8Encoding.UTF8.GetBytes（key）;
????????????byte[]?toEncryptArray?=?null;?//Convert.Frombase64String（toDecrypt）;
????????????byte[]?resultArray?=?null;
????????????try
????????????{
????????????????toEncryptArray?=?HexStringToByteArray（toDecrypt）;
????????????}
????????????catch
????????????{
????????????????toEncryptArray?=?Encoding.UTF8.GetBytes（toDecrypt）;
????????????}

????????????RijndaelManaged?rDel?=?new?RijndaelManaged（）;
????????????rDel.Key?=?keyArray;
????????????rDel.Mode?=?CipherMode.ECB;
????????????rDel.Padding?=?PaddingMode.PKCS7;

????????????ICryptoTransform?cTransform?=?rDel.CreateEncryptor（）;
????????????using?（MemoryStream?outputStream?=?new?MemoryStream（））
????????????{
????????????????using?（CryptoStream?inputStream?=?new?CryptoStream（outputStream?cTransform?CryptoStreamMode.Write））
????????????????{
????????????????????inputStream.Write（toEncryptArray?0?toEncryptArray.Length）;
????????????????????inputStream.FlushFinalBlock（）;
????????????????????resultArray?=?outputStream.ToArray（）;
????????????????}

????????????}
????????????return?ByteArrayToHexString（resultArray）;
????????}

????????public?static?byte[]?HexStringToByteArray（string?s）
????????{
????????????s?=?s.Replace（“?“?““）;
????????????byte[]?buffer?=?new?byte[s.Length?/?2];
????????????for?（int?i?=?0;?i?????????????{
????????????????buffer[i?/?2]?=?（byte）Convert.ToByte（s.Substring（i?2）?16）;
????????????}

??????