ENCODE解密方法

[日期：2005-12-21]

作者：佚名

[字体：大中小]

Encode，实际是一种不完全的Unicode 文本（见过Unicode 吗？汉字全是%uxxxx的），当表示英文或数字时，它与普通文本并无区别。但在表示各种控制符、特殊符号、扩展ASCII 字符（如汉字）甚至空格时，它就把它们全变成了%xx%xx的形式。

解密ENCODE有很多方法,我所提供的是一个网页的解密代码,代码如下

<FONT size=2><html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>网页解密</title>
<style>
td,select,input{font-size:10.5pt; color:#000000; height:16pt}
textarea{font-size:14; color:#000000}
a:link {text-decoration:none; color:#555555}
a:hover {text-decoration:underline; color:#555555; background-color:ffff00}
a:visited {text-decoration:none; color:#555555}
</style>
</head>
<BODY> 
<script language="javascript">
<!--
function screncode(s,l)
{enc=new ActiveXObject("Scripting.Encoder");
return enc.EncodeScriptFile("."+l,s,0,l+"cript");
}

var STATE_COPY_INPUT  = 100
var STATE_READLEN  = 101
var STATE_DECODE  = 102
var STATE_UNESCAPE  = 103

var pick_encoding = new Array(
  1, 2, 0, 1, 2, 0, 2, 0, 0, 2, 0, 2, 1, 0, 2, 0,
  1, 0, 2, 0, 1, 1, 2, 0, 0, 2, 1, 0, 2, 0, 0, 2,
  1, 1, 0, 2, 0, 2, 0, 1, 0, 1, 1, 2, 0, 1, 0, 2,
  1, 0, 2, 0, 1, 1, 2, 0, 0, 1, 1, 2, 0, 1, 0, 2
)

var rawData = new Array(
  0x64,0x37,0x69, 0x50,0x7E,0x2C, 0x22,0x5A,0x65, 0x4A,0x45,0x72,
  0x61,0x3A,0x5B, 0x5E,0x79,0x66, 0x5D,0x59,0x75, 0x5B,0x27,0x4C,
  0x42,0x76,0x45, 0x60,0x63,0x76, 0x23,0x62,0x2A, 0x65,0x4D,0x43,
  0x5F,0x51,0x33, 0x7E,0x53,0x42, 0x4F,0x52,0x20, 0x52,0x20,0x63,
  0x7A,0x26,0x4A, 0x21,0x54,0x5A, 0x46,0x71,0x38, 0x20,0x2B,0x79,
  0x26,0x66,0x32, 0x63,0x2A,0x57, 0x2A,0x58,0x6C, 0x76,0x7F,0x2B,
  0x47,0x7B,0x46, 0x25,0x30,0x52, 0x2C,0x31,0x4F, 0x29,0x6C,0x3D,
  0x69,0x49,0x70, 0x3F,0x3F,0x3F, 0x27,0x78,0x7B, 0x3F,0x3F,0x3F,
  0x67,0x5F,0x51, 0x3F,0x3F,0x3F, 0x62,0x29,0x7A, 0x41,0x24,0x7E,
  0x5A,0x2F,0x3B, 0x66,0x39,0x47, 0x32,0x33,0x41, 0x73,0x6F,0x77,
  0x4D,0x21,0x56, 0x43,0x75,0x5F, 0x71,0x28,0x26, 0x39,0x42,0x78,
  0x7C,0x46,0x6E, 0x53,0x4A,0x64, 0x48,0x5C,0x74, 0x31,0x48,0x67,
  0x72,0x36,0x7D, 0x6E,0x4B,0x68, 0x70,0x7D,0x35, 0x49,0x5D,0x22,
  0x3F,0x6A,0x55, 0x4B,0x50,0x3A, 0x6A,0x69,0x60, 0x2E,0x23,0x6A,
  0x7F,0x09,0x71, 0x28,0x70,0x6F, 0x35,0x65,0x49, 0x7D,0x74,0x5C,
  0x24,0x2C,0x5D, 0x2D,0x77,0x27, 0x54,0x44,0x59, 0x37,0x3F,0x25,
  0x7B,0x6D,0x7C, 0x3D,0x7C,0x23, 0x6C,0x43,0x6D, 0x34,0x38,0x28,
  0x6D,0x5E,0x31, 0x4E,0x5B,0x39, 0x2B,0x6E,0x7F, 0x30,0x57,0x36,
  0x6F,0x4C,0x54, 0x74,0x34,0x34, 0x6B,0x72,0x62, 0x4C,0x25,0x4E,
  0x33,0x56,0x30, 0x56,0x73,0x5E, 0x3A,0x68,0x73, 0x78,0x55,0x09,
  0x57,0x47,0x4B, 0x77,0x32,0x61, 0x3B,0x35,0x24, 0x44,0x2E,0x4D,
  0x2F,0x64,0x6B, 0x59,0x4F,0x44, 0x45,0x3B,0x21, 0x5C,0x2D,0x37,
  0x68,0x41,0x53, 0x36,0x61,0x58, 0x58,0x7A,0x48, 0x79,0x22,0x2E,
  0x09,0x60,0x50, 0x75,0x6B,0x2D, 0x38,0x4E,0x29, 0x55,0x3D,0x3F
)

var transformed = new Array()
for (var i=0; i<3; i++) transformed[i] = new Array()
for (var i=31; i<=126; i++) for (var j=0; j<3; j++) transformed[j][rawData[(i-31) * 3 + j]] = (i==31) ? 9 : i

var digits = new Array()
for (var i=0; i<26; i++)
{
  digits["A".charCodeAt(0)+i] = i
  digits["a".charCodeAt(0)+i] = i+26
}
for (var i=0; i<10; i++) digits["0".charCodeAt(0)+i] = i+52
digits[0x2b] = 62
digits[0x2f] = 63

function unescape(char)
{
  var escapes = "#&!*$"
  var escaped = "\r\n<>@"

if (char.charCodeAt(0) > 126) return char
  if (escapes.indexOf(char) != -1) return escaped.substr(escapes.indexOf(char), 1)
  return "?"
}

function decodeBase64(string)
{
  var val = 0
  val +=  (digits[string.substr(0,1).charCodeAt(0)] << 2)
  val +=  (digits[string.substr(1,1).charCodeAt(0)] >> 4)
  val +=  (digits[string.substr(1,1).charCodeAt(0)] & 0xf) << 12
  val += ((digits[string.substr(2,1).charCodeAt(0)] >> 2) << 8)
  val += ((digits[string.substr(2,1).charCodeAt(0)] & 0x3) << 22)
  val +=  (digits[string.substr(3,1).charCodeAt(0)] << 16)
  return val
}

function strdec(encodingString)
{
  
  var marker = "#@~^"
  var stringIndex = 0
  var scriptIndex = -1
  var unEncodingIndex = 0
  var char = null
  var encodingLength = unEncodinglength = 0
  var state = STATE_COPY_INPUT
  var unEncodingString = ""
  var re, arr
  
  while(state)
  {
   switch (state)
   {
    case (STATE_COPY_INPUT) :
     scriptIndex = encodingString.indexOf(marker, stringIndex)
     if (scriptIndex != -1)
     {
      unEncodingString += encodingString.substring(stringIndex, scriptIndex)
      scriptIndex += marker.length
      state = STATE_READLEN
     }
     else
     {
      stringIndex = stringIndex==0 ? 0 : stringIndex
      unEncodingString += encodingString.substr(stringIndex, encodingString.length)
      state = 0
     }
     break
    
    case (STATE_READLEN) :
     encodingLength = encodingString.substr(scriptIndex, 6)
     unEncodinglength = decodeBase64(encodingLength)
     scriptIndex += (6 + "==".length)
     state = STATE_DECODE
     break
     
    case (STATE_DECODE) :
     if (!unEncodinglength)
     {
      stringIndex = scriptIndex + "DQgAAA==^#~@".length
      unEncodingIndex = 0
      state = STATE_COPY_INPUT
      break
     }
     char = encodingString.substr(scriptIndex, 1)
     if (char == "@") state = STATE_UNESCAPE
     else
     {
      if (char.charCodeAt(0) < 0xFF)
      {
       unEncodingString += String.fromCharCode(transformed[pick_encoding[unEncodingIndex%64]][char.charCodeAt(0)])
       unEncodingIndex++
      }
      else
      {
       unEncodingString += char
      }      
      scriptIndex++
      unEncodinglength--
      break
     }
     
    case STATE_UNESCAPE:
     unEncodingString += unescape(encodingString.substr(++scriptIndex, 1))
     scriptIndex++; unEncodinglength -=2
     unEncodingIndex++
     state = STATE_DECODE
     break
   }
  }
  
  re  = new RegExp("(JScript|VBscript).encode", "gmi")
  while(arr = re.exec(unEncodingString)) unEncodingString = RegExp.leftContext + RegExp.$1 + RegExp.rightContext
  return unEncodingString
}

//-->
</script>

<form name=qq> 
<p align="center"><b><font face="华文中宋" color="#0000FF" size="6">ENCODE加 
密 解 密</font></b></p>
<p> 
<br> 
请输入要加密或解密的文本：</p>
<div align=center>
<table><tr align=center><td colspan=2>
<textarea name=codeinput cols=100 rows="15"></textarea> 
</td></tr>
<tr align=center><td>
<input type="button" value="Encode加密" onclick="this.form.codeinput.value=screncode(this.form.codeinput.value,'JS')"> 
</td><td>

<p style="width:100%;padding:0 40px;text-align:left">加密时应只加密脚本部分，不加密脚本标记<script language="javascript">，</p>

<p style="width:100%;padding:0 40px;text-align:left">并且加密后脚本标记应改为：<script language="JScript.Encode"></p>

</div>

</BODY> 
</HTML>
</FONT>

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