JavaScript Decryption Tool
The HTML Decoder
This is just a quick sample of how to accomplish embedded HTML entity decryption with
javascript. It's actually only a small portion of the code at the Scumple
I wrote several years ago, but it was necessary for another project I am working on, so I
dedicated this page to demontrating that functionality.
Back to the point. The code here converts entity encoded values like &0032; to their
actual text counterparts, and place results into the box below. To start, just paste or enter
some entity-encoded text within the box below. Then click Decode Text.
Results will appear here.
The Code
<script type="text/javascript">
function decodetest(){
//get the input
var t = document.getElementById('dectest').value;
//remove carriage returns
t = t.replace(new RegExp("\\=\r\n","gim"), "");
//replace urlencoded values
t = unescape(t);
//replacement values
var thechrs = new Array(
' ','!','"','#','$','%','&',"'",'(',')','*','+',',','-','.','/','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','{','|','}','~',' ','c','u','e','a',
'a','a','a','c','e','e','e','i','i','i','a','a','e','ae','ae','o','o','o','u','u',
'y','u','u','o','l','0','x','f','a','i','o','u','n','n','*','O','?','r','_','?',
'?','!','<','>','_','_','_','|','|','a','a','a','c','|','|','+','+','c','y','+',
'+','-','-','+','-','+','a','a','+','+','-','-','|','-','+','.','.','d','e','e',
'e','i','i','i','i','+','+','_','_','|','i','_','o','o','o','o','o','o','u','p',
'p','u','u','u','y','y','_',"'",'-','?','_','?','?','S','÷','¸','°','¨','·','¹',
'³','²','_',' ');
//replace js numeric array values
var l = 32;
for (l = 32; l < 256; l++){
t = t.replace(new RegExp("\\[" + l + ",","gim"),"[" + thechrs[l-32] + ",");
t = t.replace(new RegExp("\\[" + l + ",","gim"),"[" + thechrs[l-32] + ",");
}
for (l = 32; l < 256; l++){
t = t.replace(new RegExp("," + l + "\\]","gim"),"," + thechrs[l-32] + "]");
t = t.replace(new RegExp("," + l + "\\]","gim"),"," + thechrs[l-32] + "]");
}
for (l = 32; l < 256; l++){
t = t.replace(new RegExp("," + l + ",","gim"),"," + thechrs[l-32] + ",");
t = t.replace(new RegExp("," + l + ",","gim"),"," + thechrs[l-32] + ",");
}
ta = t;
t = t.replace(new RegExp("(\\[[^\\]]+)\\,([^\\]]+\\])","gim"), "$1$2");
while(ta !== t){
ta = t;
t = t.replace(new RegExp("(\\[[^\\]]+)\\,([^\\]]+\\])","gim"), "$1$2");
}
//replace entities
var l = 32;
for (l = 32; l < 100; l++){
t = t.replace(new RegExp("&#" + l + ";","gim"),thechrs[l-32]);
t = t.replace(new RegExp("�" + l + ";","gim"),thechrs[l-32]);
t = t.replace(new RegExp("�" + l + ";","gim"),thechrs[l-32]);
}
var l = 100;
for (l = 100; l < 256; l++){
t = t.replace(new RegExp("&#" + l + ";","gim"),thechrs[l-32]);
t = t.replace(new RegExp("�" + l + ";","gim"),thechrs[l-32]);
}
//return results
document.getElementById("parsed").innerHTML = t;
}
</script>
