WorkHelper 8.180 注册码破解程序

using System.Security.Cryptography;
using System.Text;
using System.IO;
using Microsoft.VisualBasic;

        /**//// <summary>
        /// 
        /// </summary>
        /// <param name="RegCode">机器码</param>
        /// <returns></returns>
        public string Decrypt(string RegCode)
        {
            DESCryptoServiceProvider provider = new DESCryptoServiceProvider();
            provider.Key = Encoding.ASCII.GetBytes(Strings.UCase(Strings.Left("WorkHelper 办公助手 8.180", 8)));
            provider.IV = Encoding.ASCII.GetBytes(Strings.UCase(Strings.Left("WorkHelper 办公助手 8.180", 8)));
            
            string s = Strings.UCase(Environment.MachineName);
            byte[] buffer = Encoding.ASCII.GetBytes(RegCode.Substring(0, 1));
            MemoryStream stream2 = new MemoryStream();
            CryptoStream stream = new CryptoStream(stream2, provider.CreateEncryptor(), CryptoStreamMode.Write);
            stream.Write(buffer, 0, buffer.Length);
            stream.FlushFinalBlock();
            StringBuilder ret = new StringBuilder();
            foreach (byte b in stream2.ToArray())
                ret.AppendFormat("{0:X2}", b);
            ret.Insert(6, "00");
            return ret.ToString();
        }