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==RIPEMD-160 Hashing in JavaScript==



<source lang="html4strict">
<html>
<head>

<title>RIPEMD-160 Hashing</title>
</head>
<body>

<script language="JavaScript">
var RMDsize = 160;
var X = new Array();
function ROL(x, n)
{
return new Number ((x << n) | ( x >>> (32 - n)));
}
function F(x, y, z)
{
return new Number(x ^ y ^ z);
}
function G(x, y, z)
{
return new Number((x & y) | (~x & z));
}
function H(x, y, z)
{
return new Number((x | ~y) ^ z);
}
function I(x, y, z)
{
return new Number((x & z) | (y & ~z));
}
function J(x, y, z)
{
return new Number(x ^ (y | ~z));
}
function mixOneRound(a, b, c, d, e, x, s, roundNumber)
{
switch (roundNumber)
{
case 0 : a += F(b, c, d) + x + 0x00000000; break;
case 1 : a += G(b, c, d) + x + 0x5a827999; break;
case 2 : a += H(b, c, d) + x + 0x6ed9eba1; break;
case 3 : a += I(b, c, d) + x + 0x8f1bbcdc; break;
case 4 : a += J(b, c, d) + x + 0xa953fd4e; break;
case 5 : a += J(b, c, d) + x + 0x50a28be6; break;
case 6 : a += I(b, c, d) + x + 0x5c4dd124; break;
case 7 : a += H(b, c, d) + x + 0x6d703ef3; break;
case 8 : a += G(b, c, d) + x + 0x7a6d76e9; break;
case 9 : a += F(b, c, d) + x + 0x00000000; break;

default : document.write("Bogus round number"); break;
}

a = ROL(a, s) + e;
c = ROL(c, 10);
a &= 0xffffffff;
b &= 0xffffffff;
c &= 0xffffffff;
d &= 0xffffffff;
e &= 0xffffffff;
var retBlock = new Array();
retBlock[0] = a;
retBlock[1] = b;
retBlock[2] = c;
retBlock[3] = d;
retBlock[4] = e;
retBlock[5] = x;
retBlock[6] = s;
return retBlock;
}
function MDinit (MDbuf)
{
MDbuf[0] = 0x67452301;
MDbuf[1] = 0xefcdab89;
MDbuf[2] = 0x98badcfe;
MDbuf[3] = 0x10325476;
MDbuf[4] = 0xc3d2e1f0;
}
var ROLs = [
[11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8],
[ 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12],
[11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5],
[11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12],
[ 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6],
[ 8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6],
[ 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11],
[ 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5],
[15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8],
[ 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11]
];
var indexes = [
[ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15],
[ 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8],
[ 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12],
[ 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2],
[ 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13],
[ 5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12],
[ 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2],
[15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13],
[ 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14],
[12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11]
];
function compress (MDbuf, X)
{
blockA = new Array();
blockB = new Array();
var retBlock;
for (var i=0; i < 5; i++)
{
blockA[i] = new Number(MDbuf[i]);
blockB[i] = new Number(MDbuf[i]);
}
var step = 0;
for (var j = 0; j < 5; j++)
{
for (var i = 0; i < 16; i++)
{
retBlock = mixOneRound(
blockA[(step+0) % 5],
blockA[(step+1) % 5],
blockA[(step+2) % 5],
blockA[(step+3) % 5],
blockA[(step+4) % 5],
X[indexes[j][i]],
ROLs[j][i],
j
);
blockA[(step+0) % 5] = retBlock[0];
blockA[(step+1) % 5] = retBlock[1];
blockA[(step+2) % 5] = retBlock[2];
blockA[(step+3) % 5] = retBlock[3];
blockA[(step+4) % 5] = retBlock[4];
step += 4;
}
}
step = 0;
for (var j = 5; j < 10; j++)
{
for (var i = 0; i < 16; i++)
{
retBlock = mixOneRound(
blockB[(step+0) % 5],
blockB[(step+1) % 5],
blockB[(step+2) % 5],
blockB[(step+3) % 5],
blockB[(step+4) % 5],
X[indexes[j][i]],
ROLs[j][i],
j
);
blockB[(step+0) % 5] = retBlock[0];
blockB[(step+1) % 5] = retBlock[1];
blockB[(step+2) % 5] = retBlock[2];
blockB[(step+3) % 5] = retBlock[3];
blockB[(step+4) % 5] = retBlock[4];
step += 4;
}
}
blockB[3] += blockA[2] + MDbuf[1];
MDbuf[1] = MDbuf[2] + blockA[3] + blockB[4];
MDbuf[2] = MDbuf[3] + blockA[4] + blockB[0];
MDbuf[3] = MDbuf[4] + blockA[0] + blockB[1];
MDbuf[4] = MDbuf[0] + blockA[1] + blockB[2];
MDbuf[0] = blockB[3];
}
function zeroX(X)
{
for (var i = 0; i < 16; i++) { X[i] = 0; }
}
function MDfinish (MDbuf, strptr, lswlen, mswlen)
{
var X = new Array(16);
zeroX(X);
var j = 0;
for (var i=0; i < (lswlen & 63); i++)
{
X[i >>> 2] ^= (strptr.charCodeAt(j++) & 255) << (8 * (i & 3));
}
X[(lswlen >>> 2) & 15] ^= 1 << (8 * (lswlen & 3) + 7);
if ((lswlen & 63) > 55)
{
compress(MDbuf, X);
var X = new Array(16);
zeroX(X);
}
X[14] = lswlen << 3;
X[15] = (lswlen >>> 29) | (mswlen << 3);
compress(MDbuf, X);
}
function BYTES_TO_DWORD(fourChars)
{
var tmp = (fourChars.charCodeAt(3) & 255) << 24;
tmp |= (fourChars.charCodeAt(2) & 255) << 16;
tmp |= (fourChars.charCodeAt(1) & 255) << 8;
tmp |= (fourChars.charCodeAt(0) & 255);
return tmp;
}
function RMD(message)
{
var MDbuf = new Array(RMDsize / 32);
var hashcode = new Array(RMDsize / 8);
var length;
var nbytes;
MDinit(MDbuf);
length = message.length;
var X = new Array(16);
zeroX(X);
var j=0;
for (var nbytes=length; nbytes > 63; nbytes -= 64)
{
for (var i=0; i < 16; i++)
{
X[i] = BYTES_TO_DWORD(message.substr(j, 4));
j += 4;
}
compress(MDbuf, X);
}
MDfinish(MDbuf, message.substr(j), length, 0);
for (var i=0; i < RMDsize / 8; i += 4)
{
hashcode[i] = MDbuf[i >>> 2] & 255;
hashcode[i+1] = (MDbuf[i >>> 2] >>> 8) & 255;
hashcode[i+2] = (MDbuf[i >>> 2] >>> 16) & 255;
hashcode[i+3] = (MDbuf[i >>> 2] >>> 24) & 255;
}
return hashcode;
}
function toHex32(x)
{
var hexChars = "0123456789abcdef";
var hex = "";
for (var i = 0; i < 2; i++)
{
hex = String(hexChars.charAt(x & 0xf)).concat(hex);
x >>>= 4;
}
return hex;
}
function toRMDstring(hashcode)
{
var retString = "";
for (var i=0; i < RMDsize/8; i++)
{
retString += toHex32(hashcode[i]);
}
return retString;
}

function RMDstring(message)
{
var hashcode = RMD(message);
var retString = "";
for (var i=0; i < RMDsize/8; i++)
{
retString += toHex32(hashcode[i]);
}
return retString;
}
</script>
<form>
<font color=#000000 size=3>Input</font>
<input type=text name=input size=40><br>
<font color=#000000 size=3>Result</font>
<input type=text name=hash size=50><br>
<input type=button value="Hash It!" onclick="hash.value = RMDstring(input.value)">
</form>
</body>
</html>

</source>

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в 09:59, 26 мая 2010

Admin: 1 версия