一个MD4在线加密脚本源码

最新推荐文章于 2025-07-05 14:18:27 发布

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最新推荐文章于 2025-07-05 14:18:27 发布

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原文链接：http://www.cnblogs.com/mrjim/archive/2011/09/12/4475267.html

本文介绍了MD4在线加密工具的使用方法，该工具能够实现字符串的MD4加密，并提供了大写字母选项。同时，文章提供了核心加密算法的JavaScript实现。

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<html>
<head>
<META HTTP-EQUIV="MSThemeCompatible" CONTENT="Yes">
<meta http-equiv="Content-Type" content="text/html; charset=unicode">
<title>MD4在线加密工具 | 蓝莓's Blog</title>
<style>
form input {font-family: "Courier New", Verdana; font-size:11pt;}
</style>
</head>

<BODY bgcolor="#EAF0F8" topmargin="10" leftmargin="10" rightmargin="10" bottommargin="10">
<form>
<div id="contain" style="font-family:'Tahoma', 'Arial'; font-size:11pt">
<div id="mainbg">
<div style="color: #000080; margin-bottom:10px"><b>MD4在线加密工具</b></div>
<div>
<textarea id="src" rows=11 cols=60 value="" name="input"></textarea>
<div style="margin: 10 0 10 0">
<input onclick="var v = hex_md4(input.value); hash.value = (uc.checked) ? v.toUpperCase() : v.toLowerCase();" type=button value="加密" name="encode">&nbsp;
<input type="checkbox" value="y" name="uc" onclick="hash.value = (uc.checked) ? hash.value.toUpperCase() : hash.value.toLowerCase();">大写字母
</div>
<input type="text" name="hash" size="50">
</div>
</div>
</div>
</form>
<br>
<a href="http://lanmei.sinaapp.com/" target="_blank">点此返回蓝莓's Blog</a>
</BODY>
</html>
<script language="javascript">
var hexcase = 0;
var b64pad = "";
var chrsz = 8;
function hex_md4(s){ return binl2hex(core_md4(str2binl(s), s.length * chrsz));}
function b64_md4(s){ return binl2b64(core_md4(str2binl(s), s.length * chrsz));}
function str_md4(s){ return binl2str(core_md4(str2binl(s), s.length * chrsz));}
function hex_hmac_md4(key, data) { return binl2hex(core_hmac_md4(key, data)); }
function b64_hmac_md4(key, data) { return binl2b64(core_hmac_md4(key, data)); }
function str_hmac_md4(key, data) { return binl2str(core_hmac_md4(key, data)); }
function md4_vm_test()
{
return hex_md4("abc") == "a448017aaf21d8525fc10ae87aa6729d";
}
function core_md4(x, len)
{
x[len >> 5] |= 0x80 << (len % 32);
x[(((len + 64) >>> 9) << 4) + 14] = len;

var a = 1732584193;
var b = -271733879;
var c = -1732584194;
var d = 271733878;

for(var i = 0; i < x.length; i += 16)
{
var olda = a;
var oldb = b;
var oldc = c;
var oldd = d;

a = md4_ff(a, b, c, d, x[i+ 0], 3 );
d = md4_ff(d, a, b, c, x[i+ 1], 7 );
c = md4_ff(c, d, a, b, x[i+ 2], 11);
b = md4_ff(b, c, d, a, x[i+ 3], 19);
a = md4_ff(a, b, c, d, x[i+ 4], 3 );
d = md4_ff(d, a, b, c, x[i+ 5], 7 );
c = md4_ff(c, d, a, b, x[i+ 6], 11);
b = md4_ff(b, c, d, a, x[i+ 7], 19);
a = md4_ff(a, b, c, d, x[i+ 8], 3 );
d = md4_ff(d, a, b, c, x[i+ 9], 7 );
c = md4_ff(c, d, a, b, x[i+10], 11);
b = md4_ff(b, c, d, a, x[i+11], 19);
a = md4_ff(a, b, c, d, x[i+12], 3 );
d = md4_ff(d, a, b, c, x[i+13], 7 );
c = md4_ff(c, d, a, b, x[i+14], 11);
b = md4_ff(b, c, d, a, x[i+15], 19);

a = md4_gg(a, b, c, d, x[i+ 0], 3 );
d = md4_gg(d, a, b, c, x[i+ 4], 5 );
c = md4_gg(c, d, a, b, x[i+ 8], 9 );
b = md4_gg(b, c, d, a, x[i+12], 13);
a = md4_gg(a, b, c, d, x[i+ 1], 3 );
d = md4_gg(d, a, b, c, x[i+ 5], 5 );
c = md4_gg(c, d, a, b, x[i+ 9], 9 );
b = md4_gg(b, c, d, a, x[i+13], 13);
a = md4_gg(a, b, c, d, x[i+ 2], 3 );
d = md4_gg(d, a, b, c, x[i+ 6], 5 );
c = md4_gg(c, d, a, b, x[i+10], 9 );
b = md4_gg(b, c, d, a, x[i+14], 13);
a = md4_gg(a, b, c, d, x[i+ 3], 3 );
d = md4_gg(d, a, b, c, x[i+ 7], 5 );
c = md4_gg(c, d, a, b, x[i+11], 9 );
b = md4_gg(b, c, d, a, x[i+15], 13);

a = md4_hh(a, b, c, d, x[i+ 0], 3 );
d = md4_hh(d, a, b, c, x[i+ 8], 9 );
c = md4_hh(c, d, a, b, x[i+ 4], 11);
b = md4_hh(b, c, d, a, x[i+12], 15);
a = md4_hh(a, b, c, d, x[i+ 2], 3 );
d = md4_hh(d, a, b, c, x[i+10], 9 );
c = md4_hh(c, d, a, b, x[i+ 6], 11);
b = md4_hh(b, c, d, a, x[i+14], 15);
a = md4_hh(a, b, c, d, x[i+ 1], 3 );
d = md4_hh(d, a, b, c, x[i+ 9], 9 );
c = md4_hh(c, d, a, b, x[i+ 5], 11);
b = md4_hh(b, c, d, a, x[i+13], 15);
a = md4_hh(a, b, c, d, x[i+ 3], 3 );
d = md4_hh(d, a, b, c, x[i+11], 9 );
c = md4_hh(c, d, a, b, x[i+ 7], 11);
b = md4_hh(b, c, d, a, x[i+15], 15);

a = safe_add(a, olda);
b = safe_add(b, oldb);
c = safe_add(c, oldc);
d = safe_add(d, oldd);

}
return Array(a, b, c, d);

}
function md4_cmn(q, a, b, x, s, t)
{
return safe_add(rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
}
function md4_ff(a, b, c, d, x, s)
{
return md4_cmn((b & c) | ((~b) & d), a, 0, x, s, 0);
}
function md4_gg(a, b, c, d, x, s)
{
return md4_cmn((b & c) | (b & d) | (c & d), a, 0, x, s, 1518500249);
}
function md4_hh(a, b, c, d, x, s)
{
return md4_cmn(b ^ c ^ d, a, 0, x, s, 1859775393);
}
function core_hmac_md4(key, data)
{
var bkey = str2binl(key);
if(bkey.length > 16) bkey = core_md4(bkey, key.length * chrsz);

var ipad = Array(16), opad = Array(16);
for(var i = 0; i < 16; i++)
{
ipad[i] = bkey[i] ^ 0x36363636;
opad[i] = bkey[i] ^ 0x5C5C5C5C;
}

var hash = core_md4(ipad.concat(str2binl(data)), 512 + data.length * chrsz);
return core_md4(opad.concat(hash), 512 + 128);
}
function safe_add(x, y)
{
var lsw = (x & 0xFFFF) + (y & 0xFFFF);
var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
return (msw << 16) | (lsw & 0xFFFF);
}
function rol(num, cnt)
{
return (num << cnt) | (num >>> (32 - cnt));
}
function str2binl(str)
{
var bin = Array();
var mask = (1 << chrsz) - 1;
for(var i = 0; i < str.length * chrsz; i += chrsz)
bin[i>>5] |= (str.charCodeAt(i / chrsz) & mask) << (i%32);
return bin;
}
function binl2str(bin)
{
var str = "";
var mask = (1 << chrsz) - 1;
for(var i = 0; i < bin.length * 32; i += chrsz)
str += String.fromCharCode((bin[i>>5] >>> (i % 32)) & mask);
return str;
}
function binl2hex(binarray)
{
var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
var str = "";
for(var i = 0; i < binarray.length * 4; i++)
{
str += hex_tab.charAt((binarray[i>>2] >> ((i%4)*8+4)) & 0xF) +
hex_tab.charAt((binarray[i>>2] >> ((i%4)*8 )) & 0xF);
}
return str;
}
function binl2b64(binarray)
{
var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var str = "";
for(var i = 0; i < binarray.length * 4; i += 3)
{
var triplet = (((binarray[i >> 2] >> 8 * ( i %4)) & 0xFF) << 16)
| (((binarray[i+1 >> 2] >> 8 * ((i+1)%4)) & 0xFF) << 8 )
| ((binarray[i+2 >> 2] >> 8 * ((i+2)%4)) & 0xFF);
for(var j = 0; j < 4; j++)
{
if(i * 8 + j * 6 > binarray.length * 32) str += b64pad;
else str += tab.charAt((triplet >> 6*(3-j)) & 0x3F);
}
}
return str;
}
</script>
</html>

附上此工具地址 MD4在线加密工具

转载于:https://www.cnblogs.com/mrjim/archive/2011/09/12/4475267.html