一个控件的注册算法分析

Licensing
serverName  和 ip
分别是.GetServerVariable("SERVER_NAME").ToLower(), control.GetServerVariable("LOCAL_ADDR"),

这个为真的的话就暴破完成
protected bool CheckLicenseKeys(out string errorMessage)
{
      errorMessage = new Licensing(this).CheckLicenseKeys();
      return (string.Empty == errorMessage);
}

关键的注册算法
private Licensing.ValidationResult ValidateLicense(string companyName, string encodedLicense, string serverName, string serverIP)
{
      string text1;
      DateTime time1;
      try
      {
            text1 = this.DecryptLicense(Convert.FromBase64String(encodedLicense));
      }
      catch (FormatException)
      {
            return Licensing.ValidationResult.LicenseInvalid;
      }
      string[] textArray1 = text1.Split(new char[] { Convert.ToChar(1) });
      if ((((textArray1.Length < 5) || (textArray1[4] != "v2")) || (textArray1[1] != companyName)) || ((!this._isLocalhost && !serverName.EndsWith("." + this.LicensedServer(textArray1))) && (((serverName != this.LicensedServer(textArray1)) && (serverName != textArray1[0])) && !this.MatchesLicenseIP(textArray1, serverIP))))
      {
            return Licensing.ValidationResult.LicenseInvalid;
      }
      try
      {
            time1 = DateTime.ParseExact(textArray1[2], "d", new CultureInfo("en-US", true));
      }
      catch (FormatException)
      {
            if (textArray1[2] == "forever")
            {
                  return Licensing.ValidationResult.LicenseOk;
            }
            return Licensing.ValidationResult.LicenseInvalid;
      }
      TimeSpan span1 = (TimeSpan) (time1 - DateTime.Now);
      if (span1.Days > 0)
      {
            return Licensing.ValidationResult.LicenseOk;
      }
      return Licensing.ValidationResult.LicenseExpired;
}

private string DecryptLicense(byte[] licenseKey)
{
      string text1 = string.Empty;
      RijndaelManaged managed1 = new RijndaelManaged();
      managed1.Mode = CipherMode.CBC;
      MemoryStream stream1 = new MemoryStream();
      CryptoStream stream2 = new CryptoStream(stream1, managed1.CreateDecryptor(ControlHelper.Key, ControlHelper.Vector), CryptoStreamMode.Write);
      stream2.Write(licenseKey, 0, licenseKey.Length);
      try
      {
            stream2.Close();
            stream1.Close(); // 不知道反编译的时候为什么会有这个问题
            return Encoding.ASCII.GetString(stream1.ToArray());
      }
      catch (Exception)
      {
            stream2 = null;
            return "";
      }
}
把第三个字符变小写
private string LicensedServer(string[] licenseParts)
{
      return licenseParts[3].ToLower();
}

 private bool MatchesLicenseIP(string[] licenseParts, string serverIP)
{
      if ((licenseParts.Length >= 6) && (licenseParts[5] == "s1"))
      {
            return (this.LicensedIP(licenseParts) == serverIP);
      }
      return false;
}

 private string LicensedIP(string[] licenseParts)
{
      return licenseParts[3];
}

 

 

 if ((((textArray1.Length < 5) || (textArray1[4] != "v2")) || (textArray1[1] != companyName)) || ((!this._isLocalhost && !serverName.EndsWith("." + this.LicensedServer(textArray1))) && (((serverName != this.LicensedServer(textArray1)) && (serverName != textArray1[0])) && !this.MatchesLicenseIP(textArray1, serverIP))))
      {
            return Licensing.ValidationResult.LicenseInvalid;
      }

radcontrol与这个来分隔
((textArray1.Length < 5) || (textArray1[4] != "v2"))
长度必面是大于五 第四为V2
(textArray1[1] != companyName))
第一个数组必须为 companyName

((!this._isLocalhost && !serverName.EndsWith("." + this.LicensedServer(textArray1))) && (((serverName != this.LicensedServer(textArray1)) && (serverName != textArray1[0])) && !this.MatchesLicenseIP(textArray1, serverIP)))
(!this._isLocalhost && !serverName.EndsWith("." + this.LicensedServer(textArray1)))
isLocalhost 应该是判断是否为本机  如果是本机等到的为假
判断 serverName 是否为 第三个数组 当服务器判断正解也为假 
得出如果是本机的话 到这边就可以结束了  如果是服务器还会为真

如果是服务器则继续看下去
(((serverName != this.LicensedServer(textArray1)) && (serverName != textArray1[0])) && !this.MatchesLicenseIP(textArray1, serverIP))
((serverName != this.LicensedServer(textArray1)) && (serverName != textArray1[0]))

数组的第三个为 ip 或者服务器的名字都可以

第二个数组为textArray1[2] == "forever"
表示永远不会过期

第一个为companyname第二个为时间第三个为服务器名和IP地址 数组要大于6个

不时道哪边地方出现了错误..自己写的注册机并没有成功,,有空的时候再继续了