ascii2native 转码 解码

 //把十六进制的编码转为原码
function asciiHex2native(strAscii) {
  var output = "";
  var posFrom = 0;
  var posTo = strAscii.indexOf("\x", posFrom);
  while (posTo >= 0) {
    output += strAscii.substring(posFrom, posTo);
    var s="";
    s=strAscii.substr(posTo, 4).replace("\x","")
    var arr=s.split(""), n=arr.length,k=0, s=0
    for(var i=0;i<n;i++){
      k=n-i-1;
      var a=arr[i].toLocaleLowerCase();
      if(a=="a"){a=10;}
      else if(a=="b"){a=11;}
      else if(a=="c"){a=12;}
      else if(a=="d"){a=13;}
      else if(a=="e"){a=14;}
      else if(a=="f"){a=15;}
      s+=(a)*Math.pow(16,k);
    }
    output += String.fromCharCode(s);
    posFrom = posTo + 4;
    posTo = strAscii.indexOf("\x", posFrom);
  }
  output+=strAscii.substring(posFrom);
  return ascii2native(output);
}

//把正常的ascii编码转为原码
function ascii2native(strAscii) {
  var output = "";
  var posFrom = 0;
  var posTo = strAscii.indexOf("\u", posFrom);
  while (posTo >= 0) {
    output += strAscii.substring(posFrom, posTo);
    output += toChar(strAscii.substr(posTo, 6));
    posFrom = posTo + 6;
    posTo = strAscii.indexOf("\u", posFrom);
  }
  output += strAscii.substr(posFrom);
  return output;
}

function toChar(str) {
  if (str.substr(0, 2) != "\u") return str;
  var code = 0;
  for (var i=2; i<str.length; i++) {
    var cc = str.charCodeAt(i);
    if (cc >= 0x30 && cc <= 0x39)
      cc = cc - 0x30;
    else if (cc >= 0x41 && cc <= 0x5A)
      cc = cc - 0x41 + 10;
    else if (cc >= 0x61 && cc <= 0x7A)
      cc = cc - 0x61 + 10;
       code <<= 4;
       code += cc;
  }

  if (code < 0xff) return str;
  return String.fromCharCode(code);
}

如下一段加密的代码：

var FF={"x48x6Fx6Dx65":{"x55x72x6C":document["x55x52x4C"],"x54x70x6C":"x64x65x66x61x6Cx75x74","x43x68x61x6Ex6Ex65x6C":"","x47x65x74x43x68x61x6Ex6Ex65x6C":function (_0xa267x1){if(_0xa267x1=="x31"){return "x76x6Fx64";} ;if(_0xa267x1=="x32"){return "x6Ex65x77x73";} ;if(_0xa267x1=="x33"){return "x73x70x65x63x69x61x6C";} ;} ,"x4Ax73":function (){this["x43x68x61x6Ex6Ex65x6C"]=this.GetChannel(Sid);if($("x23x77x64")["x6Cx65x6Ex67x74x68"]>0){$key="u8F93u5165u5F71u7247u540Du79F0u6216u4E3Bu6F14u540Du79F0";if($("x23x77x64")["x76x61x6C"]()==""){$("x23x77x64")["x76x61x6C"]($key);} ;$("x23x77x64")["x66x6Fx63x75x73"](function (){if($("x23x77x64")["x76x61x6C"]()==$key){$("x23x77x64")["x76x61x6C"]("");} ;} );$("x23x77x64")["x62x6Cx75x72"](function (){if($("x23x77x64")["x76x61x6C"]()==""){$("x23x77x64")["x76x61x6C"]($key);} ;} );} ;$("x23x66x61x76")["x63x6Cx69x63x6B"](function (){var _0xa267x2=window["x6Cx6Fx63x61x74x69x6Fx6E"]["x68x72x65x66"];try{window["x65x78x74x65x72x6Ex61x6C"]["x61x64x64x46x61x76x6Fx72x69x74x65"](_0xa267x2,document["x74x69x74x6Cx65"]);} catch(err){try{window["x73x69x64x65x62x61x72"]["x61x64x64x50x61x6Ex65x6C"](document["x74x69x74x6Cx65"],_0xa267x2,"");}

转码后的结果为

var FF={"Home":{"Url":document["URL"],"Tpl":"defalut","Channel":"","GetChannel":function (_0xa267x1){if(_0xa267x1=="1"){return "vod";} ;if(_0xa267x1=="2"){return "news";} ;if(_0xa267x1=="3"){return "special";} ;} ,"Js":function (){this["Channel"]=this.GetChannel(Sid);if($("#wd")["length"]>0){$key="输入影片名称或主演名称";if($("#wd")["val"]()==""){$("#wd")["val"]($key);} ;$("#wd")["focus"](function (){if($("#wd")["val"]()==$key){$("#wd")["val"]("");} ;} );$("#wd")["blur"](function (){if($("#wd")["val"]()==""){$("#wd")["val"]($key);} ;} );} ;$("#fav")["click"](function (){var _0xa267x2=window["location"]["href"];try{window["external"]["addFavorite"](_0xa267x2,document["title"]);} catch(err){try{window["sidebar"]["addPanel"](document["title"],_0xa267x2,"");}