C# WEPkey 生成器

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引言

无论您听到了关于无线网络 WEP（Wired Equivalent Privacy，有线等效保密）加密的什么负面评价，不使用它就是在自找麻烦。通常，设置起来快速且简单，而且至少它不会花你任何费用！

然而，生成要使用的随机 WEP 密钥可能很麻烦 - 很难想出新的密钥，如果您希望在您的无线网络上获得良好的安全性，您需要定期更改它们。 我在 Warewolf Labs 找到了一个基于 JavaScript 的 WepKey 生成器，并受到了启发，所以我不得不使用 C# 制作一个 WepKey 生成器。 整个代码是用 JavaScript 编写的，并且慷慨地免费提供了代码以供分发（非常感谢他们所做的出色工作！）JavaScript 中有几个方法调用在 .NET 框架中不存在，所以我不得不为它们创建一个等效的方法。 我必须做的第二件事是将整个重新生成的 C# 代码重新打包成面向对象的包装。 当您想要将 WepKey 类继承到您自己的项目中时，这会很方便。 使用此应用程序，您可以为您的无线局域网生成良好的、强大的 WEP 密钥！ 有关 WEP 密钥设置和术语的良好入门知识可以在这里找到。

首先，这个应用程序可以分为两个部分

• 一、基于自定义密码创建 WepKey。
• 二、通过选择您的硬件所需的相应长度来生成伪随机 WepKey。

首先，我必须为我的应用程序创建一个资源来匹配输入的密码。 第一个数组是一个 char 数组，可以容纳最多 95 个最常用的 (ASCII) 字符。 第二个是一个 string 数组，其长度与 ASCII 数组相同。

  /// <remarks>
  /// Two public static array's for serving as a resource
  /// witch will be used to match the input (string) value.
  /// Both array's share the same index.
  /// </remarks>
  /// <summary>
  /// These are the 95 most possible characters from witch 
  /// to choose for generating the WEP key.
  /// </summary>
  public static char [] asciiArray = new char[95] {
        ' ', '!', '"', '#', '$', '%', '&', '\'', '(', ')', 
       '*', '+', ',', '-', '.', '/','0', '1', '2', '3', 
       '4', '5', '6', '7', '8', '9', ':', ';', '<', '=', 
       '>', '?', '@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 
       'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 
       'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', '[', 
       '\\', ']', '^', '_', '\'', 'a', 'b', 'c', 'd', 'e', 
       'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 
       'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 
       'z', '{', '|', '}', '~'
  };
  /// <summary>
  /// 95 HEX value's that uses the ASCII index from above.
  /// </summary>
  public static string [] hexArray = new string [95] {
          "20","21","22","23","24","25","26","27","28","29",
           "2A","2B","2C","2D","2E","2F","30","31","32","33",
           "34","35","36","37","38","39","3A","3B","3C","3D",
          "3E","3F","40","41","42","43","44","45","46","47",
           "48","49","4A","4B","4C","4D","4E","4F","50","51",
          "52","53","54","55","56","57","58","59","5A","5B",
       "5C","5D","5E","5F","60","61","62","63","64","65",
          "66","67","68","69","6A","6B","6C","6D","6E","6F",
          "70","71","72","73","74","75","76","77","78","79",
           "7A","7B","7C","7D","7E" 
   };

此应用程序中的第一个选项是通过输入密码来创建自定义 WepKey。 自定义密码字符串被分成字符，这些字符在 (ASCII) 资源数组中被单独匹配，并返回一个整数索引号。 此数字将由第二个方法 StringToHex 重新使用以收集 HEX 等效值，并将合并成一个字符串，最后将其返回给调用者。

/// <remarks>
  /// This method actually iterates trough the length
 /// of the passphrase to match each character in
  /// the Resources.asciiArray using the method LocateAciiIndex.
  /// Finally the actually result is matched in the Resources.hexArray
 /// and returns the result in variable string Result.
  /// Finally string Result is returned to the caller.
  /// </remarks>
  public string StringToHex() {
   int i = (int)InitialValue.DefaultIntegerValue; int j = i; 
   string Result = string.Empty;
   try {
    for (i = (int)InitialValue.DefaultIntegerStartValue; 
                              i < WepString.Length; i++) {
     j = this.LocateAsciiIndex(WepString[i]);
     Result += Resources.hexArray[j];
    }
   }
   catch (System.IndexOutOfRangeException ex) {
    Messaging.WepKeyMessage(ex.Message, 
                  Messaging.MessageIcon.Critical());
   }
   return Result;
  }

此应用程序中的第二个选项，可能是最强大的选项，是创建伪随机 WepKey。 它使用几乎相同的方法； 唯一的事情是 GenerateStrongKey 现在提供密码。

  /// <remarks>
  /// This method first clears the class string variable 'WepString';
 /// then instatiate an Random object;
  /// Then the speudo random generated integer is used
 /// as an index to resolves an character
  /// in Resources.asciiArray. The speudo random generated integer
 /// is actually limited to the max length of Resources.asciiArray.
  /// Foreach character resolved in Resources.asciiArray puts
 /// the actually result in the class variable WepString.
  /// Finally this method returns the combined character string.
  /// </remarks>
  /// <summary>
  /// (5/13/16/29 bytes for 64/128/152/256-bit WEP
  /// </summary>
  public string GenerateStrongKey(int type) {
   this.WepString = string.Empty;
   Random rdm = new Random();

   for (int i = (int)InitialValue.DefaultIntegerStartValue; i < type; i++) {
    this.WepString += 
     Resources.asciiArray[rdm.Next(Resources.asciiArray.Length)];
   }
   return this.StringToHex();
  }

创建 WepKey 时，您必须考虑使用“强生成的 wepkey”来保护您自己，但这个选择由您决定！