js-mcrypt/index.php at master · bojcheski/js-mcrypt · GitHub

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<?php
$ciphers=mcrypt_list_algorithms();
$modes	=mcrypt_list_modes();
sort($ciphers);
sort($modes);

//strip slashes from $_GET
if(get_magic_quotes_gpc())
	foreach($_GET as &$var)
		$var=stripslashes($var);
//set code values
$key=isset($_GET['hex_key'])&&$_GET['hex_key']?pack('H*',str_replace(' ','',$_GET['hex_key'])):'12345678911234567892123456789312';
$iv=isset($_GET['hex_iv'])&&$_GET['hex_iv']?pack('H*',str_replace(' ','',$_GET['hex_iv'])):'1234567891123456';
$cipher=isset($_GET['crypt'])?$_GET['crypt']:'rijndael-128';
$mode=isset($_GET['mode'])?$_GET['mode']:'cbc';
$m=isset($_GET['hex_m'])&&$_GET['hex_m']?pack('H*',str_replace(' ','',$_GET['hex_m'])):'A Plain Message';

$crypted=mcrypt_encrypt($cipher,$key,$m,$mode,$iv);

if(strlen($iv)!=mcrypt_get_iv_size($cipher,$mode))
	echo "Error IV:".strlen($iv).'!='.mcrypt_get_block_size($cipher,$mode)."</br>\n";
if(strlen($key)!=mcrypt_get_key_size($cipher,$mode))
	echo "Warning Key Lengh \"".strlen($key).'"!= maxKeyLength "'.mcrypt_get_key_size($cipher,$mode)."\"</br>\n";

$c=isset($_GET['hex_c'])&&$_GET['hex_c']?pack('H*',str_replace(' ','',$_GET['hex_c'])):$crypted;

$plain=mcrypt_decrypt($cipher,$key,$c,$mode,$iv);


function echo_options($options,$value,$keyed=false){
	foreach($options as $key=>$o){
		$v=$keyed?$key:$o;
		echo '<option value="'.$v.($v==$value?'" selected="selected':'').'">'.$o.'</option>';
	}
}

$data=json_encode(array(
	'key'=>utf8_encode($key),
	'iv'=>utf8_encode($iv),
	'c'=>utf8_encode($c),
	'm'=>utf8_encode($m),
	'crypted'=>utf8_encode($crypted),
	'plain'=>utf8_encode($plain)));
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Javascript Mcrypt</title>
<script type="text/javascript" src="Serpent.js"></script>
<script type="text/javascript" src="rijndael.js"></script>
<script type="text/javascript" src="mcrypt.js"></script>
</head>
<body>
<div style="float:left;">
<form name="main" action="" method="GET">
<table>
<tr><td>Key:</td><td><input name="key" size="48" onchange="data.key=this.value; setCrypt();"/></td></tr>
<tr><td>Hex Key:</td><td><textarea name="hex_key" onchange="data.key=hex2bin(this.value); setCrypt();"></textarea></td></tr>
<tr><td>Crypt:</td><td><select name="crypt" onchange="setCrypt();">
		<?php echo_options($ciphers,$cipher)?>
		</select></td></tr>
<tr><td>Mode of Operation:</td><td><select name="mode" onchange="setCrypt();">
		<?php echo_options($modes,$mode)?>
		</select></td></tr>
<tr><td>IV:</td><td><input name="iv" size="48" onchange="data.iv=this.value; encrypt();"/></td></tr>
<tr><td>Hex IV:</td><td><textarea name="hex_iv" onchange="data.iv=hex2bin(this.value); encrypt();"></textarea></td></tr>

<tr><td>Plain Text:</td>
	<td><textarea name="m" onchange="data.m=this.value; encrypt();"></textarea></td></tr>
<tr><td>Hex Plain Text:</td>
	<td><textarea name="hex_m" onchange="data.m=hex2bin(this.value); encrypt();"></textarea></td></tr>
<tr><td>PHP Decrypted Text:</td>
	<td><textarea disabled="disabled"><?php echo chunk_split(strtoupper(bin2hex($plain)),2,' ')?></textarea></td></tr>

<tr><td>Cipher Text:</td>
	<td><textarea name="c" onchange="data.c=this.value; decrypt();"></textarea></td></tr>
<tr><td>Hex Cipher Text:</td>
	<td><textarea name="hex_c" onchange="data.c=hex2bin(this.value); decrypt();"></textarea></td></tr>
<tr><td>PHP Encrypted Text:</td>
	<td><textarea disabled="disabled"><?php echo chunk_split(strtoupper(bin2hex($crypted)),2,' ')?></textarea></td></tr>

</table>
Check With PHP's Mcrypt:<input type="submit" value="Go"/>
</form>
</div>
<h2>Java Script Mcrypt</h2>
<p>This is a demo page for a javascript class that implements a javascript version of PHP's mcrypt. This class takes blocks ciphers, gives a common interface to them, and extends their encryption capability by enabling <a href="http://en.wikipedia.org/wiki/Block_cipher_modes_of_operation">modes of operation</a>.</p>
<p>The drop-down list of ciphers contains all of the ciphers that PHP's mcrypt uses. The disabled ones have not been incorporated into this library yet. If you know of a javascript implementation of one or more of the disabled ciphers I would be glad to hear about it on the <a href="https://code.google.com/p/js-mcrypt/">Google Code page for this project</a>. Of particular note is AES.</p>
<p>The drop-down list of modes of operation is again populated with all of the modes that PHP's mcrypt uses. Similarly, the disabled options have not been implemented in this class. I do not plan on implementing ofb (8-bit) as this is considered insecure by NIST. Stream is the mode used for stream ciphers and as no stream ciphers have yet been incorporated, this mode has not been coded.</p>
<p>Changing any option except the cypher texts will trigger the encryption with the new options. Changing the cypher text will trigger decryption. The php verification will only occur by submitting the form. If you're curious as to how the php is implemented, the source for this page is available on the <a href="https://code.google.com/p/js-mcrypt/">Google Code page for this project</a>.</p>
<script type="text/javascript">
<!--
window.onerror=function(err){alert('Error:\n'+err+"\nFor more details look in the console.");};
var temp=mcrypt.list_algorithms();
var sel=document.main.crypt.childNodes;
for(var i=sel.length-1 ; i>=0 ; i--)
	if(sel[i].tagName == 'OPTION' && temp.indexOf(sel[i].value)==-1)
		sel[i].disabled=true;
temp=mcrypt.list_modes();
sel=document.main.mode.childNodes;
for(var i=sel.length-1 ; i>=0 ; i--)
	if(sel[i].tagName == 'OPTION' && temp.indexOf(sel[i].value)==-1)
		sel[i].disabled=true;


var data=<?php echo $data?>;


var setCrypt=function(){
	var cr=document.main.crypt.value;
	var mod=document.main.mode.value;

	data.iv=pad(data.iv,mcrypt.get_iv_size(cr,mod));

	document.main.key.value=data.key;
	document.main.hex_key.value=bin2hex(data.key);

	mcrypt.Crypt(null,null,null, data.key, document.main.crypt.value, document.main.mode.value);

	encrypt();
}

var encrypt=function(){
	document.main.iv.value=data.iv;
	document.main.hex_iv.value=bin2hex(data.iv);
	document.main.m.value=data.m;
	document.main.hex_m.value=bin2hex(data.m);
	data.c=mcrypt.Encrypt(data.m, data.iv);
	document.main.c.value=data.c;
	document.main.hex_c.value=bin2hex(data.c);
}

var decrypt=function(){
	document.main.c.value=data.c;
	document.main.hex_c.value=bin2hex(data.c);
	data.m=mcrypt.Decrypt(data.c, data.iv);
	document.main.m.value=data.m;
	document.main.hex_m.value=bin2hex(data.m);
}


var hexdigits='0123456789ABCDEF';
var hexLookup=Array(256);
for(var i=0;i<256;i++)
	hexLookup[i]=hexdigits.indexOf(String.fromCharCode(i));

var bin2hex=function(str){
	var out='';
	for(var i=0;i<str.length;i++)
		out+=hexdigits[str.charCodeAt(i)>>4]+hexdigits[str.charCodeAt(i)&15]+' ';
	return out;
}

var hex2bin=function(str){
	var out='';
	var part=-1;
	for(var i=0;i<str.length;i++){
		var t=hexLookup[str.charCodeAt(i)]
		if(t>-1){
			if(part>-1){
				out+=String.fromCharCode(part|t);
				part=-1;
			}else
				part=t<<4;
		}
	}
	return out;
}

var pad=function(x,y){
	if(x.length>=y)
		return x.substr(0,y);
	for(var i=y-x.length;i;i--)
		x+=String.fromCharCode(Math.floor(Math.random()*256));
	return x;
}

setCrypt();
-->
</script>
</body>
</html>