UnknownObject/js-md5
1
0
Fork 0
mirror of https://github.com/emn178/js-md5.git synced 2026-08-12 20:31:43 +08:00
Code Issues Packages Projects Releases Wiki Activity

* Improve performance.

Browse Source 
* Add test case.
This commit is contained in:
Chen Yi-Cyuan
2015-01-11 11:46:08 +08:00
parent d934165952
commit 316a103aa1
10 changed files with 283 additions and 224 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/md5.js
+220 -183
View File
@@ -1,5 +1,5 @@
/*
* js-md5 v0.1.3
* js-md5 v0.1.4
* https://github.com/emn178/js-md5
*
* Copyright 2014-2015, emn178@gmail.com
@@ -10,183 +10,254 @@
;(function(root, undefined) {
'use strict';
if(typeof(module) != 'undefined') {
root = global;
}
var HEX_CHARS = '0123456789abcdef'.split('');
var blocks = [];
if(!root.JS_MD5_TEST && typeof(ArrayBuffer) != 'undefined') {
var buffer = new ArrayBuffer(64);
var buffer8 = new Uint8Array(buffer);
blocks = new Uint32Array(buffer);
}
var md5 = function(message, asciiOnly) {
var blocks, h0 = 0x67452301, h1 = 0xEFCDAB89, h2 = 0x98BADCFE, h3 = 0x10325476,
a, b, c, d, bc, da;
var h0 = 0x67452301, h1 = 0xEFCDAB89, h2 = 0x98BADCFE, h3 = 0x10325476,
a, b, c, d, bc, da, index = 0, bytes, length, utf8 = false, i;
if(!asciiOnly && /[^\x00-\x7F]/.test(message)) {
blocks = getBlocksFromUtf8(message);
utf8 = true;
bytes = getBytesFromUtf8(message);
length = bytes.length;
} else {
blocks = getBlocksFromAscii(message);
length = message.length;
}
for(var i = 0, length = blocks.length;i < length;i += 16) {
if(i === 0) {
a = blocks[i + 0] - 680876937;
a = ((a << 7 | a >>> 25) - 271733879) << 0;
d = blocks[i + 1] - 117830708 + ((2004318071 & a) ^ -1732584194);
d = ((d << 12 | d >>> 20) + a) << 0;
c = blocks[i + 2] - 1126478375 + (((a ^ -271733879) & d) ^ -271733879);
c = ((c << 17 | c >>> 15) + d) << 0;
b = blocks[i + 3] - 1316259209 + (((d ^ a) & c) ^ a);
b = ((b << 22 | b >>> 10) + c) << 0;
do {
if(length - index > 64) {
if(utf8) {
if(buffer8) {
for(i = 0;i < 64;++i) {
buffer8[i] = bytes[index++];
}
} else {
for(i = 0;i < 16;++i) {
blocks[i] = bytes[index++] |
bytes[index++] << 8 |
bytes[index++] << 16 |
bytes[index++] << 24;
}
}
} else {
if(buffer8) {
for(i = 0;i < 64;++i) {
buffer8[i] = message.charCodeAt(index++);
}
} else {
for(i = 0;i < 16;++i) {
blocks[i] = message.charCodeAt(index++) |
message.charCodeAt(index++) << 8 |
message.charCodeAt(index++) << 16 |
message.charCodeAt(index++) << 24;
}
}
}
} else {
blocks[0] = blocks[1] = blocks[2] = blocks[3] =
blocks[4] = blocks[5] = blocks[6] = blocks[7] =
blocks[8] = blocks[9] = blocks[10] = blocks[11] =
blocks[12] = blocks[13] = blocks[14] = blocks[15] = 0;
if(utf8) {
if(buffer8) {
for(i = 0;index < length;++index, ++i) {
buffer8[i] = bytes[index];
}
} else {
for(i = 0;index < length;++index, ++i) {
blocks[i >> 2] |= bytes[index] <<((i & 3) << 3);
}
}
} else {
if(buffer8) {
for(i = 0;index < length;++index, ++i) {
buffer8[i] = message.charCodeAt(index);
}
} else {
for(i = 0;index < length;++index, ++i) {
blocks[i >> 2] |= message.charCodeAt(index) << ((i & 3) << 3);
}
}
}
blocks[i >> 2] |= 0x80 << ((i & 3) << 3);
blocks[14] = length << 3;
}
if(index === 64) {
a = blocks[0] - 680876937 << 0;
a = (a << 7 | a >>> 25) - 271733879 << 0;
d = blocks[1] - 117830708 + ((2004318071 & a) ^ -1732584194) << 0;
d = (d << 12 | d >>> 20) + a << 0;
c = blocks[2] - 1126478375 + (((a ^ -271733879) & d) ^ -271733879) << 0;
c = (c << 17 | c >>> 15) + d << 0;
b = blocks[3] - 1316259209 + (((d ^ a) & c) ^ a) << 0;
b = (b << 22 | b >>> 10) + c << 0;
} else {
a = h0;
b = h1;
c = h2;
d = h3;
a += (d ^ (b & (c ^ d))) + blocks[i + 0] - 680876936;
a = ((a << 7 | a >>> 25) + b) << 0;
d += (c ^ (a & (b ^ c))) + blocks[i + 1] - 389564586;
d = ((d << 12 | d >>> 20) + a) << 0;
c += (b ^ (d & (a ^ b))) + blocks[i + 2] + 606105819;
c = ((c << 17 | c >>> 15) + d) << 0;
b += (a ^ (c & (d ^ a))) + blocks[i + 3] - 1044525330;
b = ((b << 22 | b >>> 10) + c) << 0;
a += (d ^ (b & (c ^ d))) + blocks[0] - 680876936 << 0;
a = (a << 7 | a >>> 25) + b << 0;
d += (c ^ (a & (b ^ c))) + blocks[1] - 389564586 << 0;
d = (d << 12 | d >>> 20) + a << 0;
c += (b ^ (d & (a ^ b))) + blocks[2] + 606105819 << 0;
c = (c << 17 | c >>> 15) + d << 0;
b += (a ^ (c & (d ^ a))) + blocks[3] - 1044525330 << 0;
b = (b << 22 | b >>> 10) + c << 0;
}
a += (d ^ (b & (c ^ d))) + blocks[i + 4] - 176418897;
a = ((a << 7 | a >>> 25) + b) << 0;
d += (c ^ (a & (b ^ c))) + blocks[i + 5] + 1200080426;
d = ((d << 12 | d >>> 20) + a) << 0;
c += (b ^ (d & (a ^ b))) + blocks[i + 6] - 1473231341;
c = ((c << 17 | c >>> 15) + d) << 0;
b += (a ^ (c & (d ^ a))) + blocks[i + 7] - 45705983;
b = ((b << 22 | b >>> 10) + c) << 0;
a += (d ^ (b & (c ^ d))) + blocks[i + 8] + 1770035416;
a = ((a << 7 | a >>> 25) + b) << 0;
d += (c ^ (a & (b ^ c))) + blocks[i + 9] - 1958414417;
d = ((d << 12 | d >>> 20) + a) << 0;
c += (b ^ (d & (a ^ b))) + blocks[i + 10] - 42063;
c = ((c << 17 | c >>> 15) + d) << 0;
b += (a ^ (c & (d ^ a))) + blocks[i + 11] - 1990404162;
b = ((b << 22 | b >>> 10) + c) << 0;
a += (d ^ (b & (c ^ d))) + blocks[i + 12] + 1804603682;
a = ((a << 7 | a >>> 25) + b) << 0;
d += (c ^ (a & (b ^ c))) + blocks[i + 13] - 40341101;
d = ((d << 12 | d >>> 20) + a) << 0;
c += (b ^ (d & (a ^ b))) + blocks[i + 14] - 1502002290;
c = ((c << 17 | c >>> 15) + d) << 0;
b += (a ^ (c & (d ^ a))) + blocks[i + 15] + 1236535329;
b = ((b << 22 | b >>> 10) + c) << 0;
a += (c ^ (d & (b ^ c))) + blocks[i + 1] - 165796510;
a = ((a << 5 | a >>> 27) + b) << 0;
d += (b ^ (c & (a ^ b))) + blocks[i + 6] - 1069501632;
d = ((d << 9 | d >>> 23) + a) << 0;
c += (a ^ (b & (d ^ a))) + blocks[i + 11] + 643717713;
c = ((c << 14 | c >>> 18) + d) << 0;
b += (d ^ (a & (c ^ d))) + blocks[i + 0] - 373897302;
b = ((b << 20 | b >>> 12) + c) << 0;
a += (c ^ (d & (b ^ c))) + blocks[i + 5] - 701558691;
a = ((a << 5 | a >>> 27) + b) << 0;
d += (b ^ (c & (a ^ b))) + blocks[i + 10] + 38016083;
d = ((d << 9 | d >>> 23) + a) << 0;
c += (a ^ (b & (d ^ a))) + blocks[i + 15] - 660478335;
c = ((c << 14 | c >>> 18) + d) << 0;
b += (d ^ (a & (c ^ d))) + blocks[i + 4] - 405537848;
b = ((b << 20 | b >>> 12) + c) << 0;
a += (c ^ (d & (b ^ c))) + blocks[i + 9] + 568446438;
a = ((a << 5 | a >>> 27) + b) << 0;
d += (b ^ (c & (a ^ b))) + blocks[i + 14] - 1019803690;
d = ((d << 9 | d >>> 23) + a) << 0;
c += (a ^ (b & (d ^ a))) + blocks[i + 3] - 187363961;
c = ((c << 14 | c >>> 18) + d) << 0;
b += (d ^ (a & (c ^ d))) + blocks[i + 8] + 1163531501;
b = ((b << 20 | b >>> 12) + c) << 0;
a += (c ^ (d & (b ^ c))) + blocks[i + 13] - 1444681467;
a = ((a << 5 | a >>> 27) + b) << 0;
d += (b ^ (c & (a ^ b))) + blocks[i + 2] - 51403784;
d = ((d << 9 | d >>> 23) + a) << 0;
c += (a ^ (b & (d ^ a))) + blocks[i + 7] + 1735328473;
c = ((c << 14 | c >>> 18) + d) << 0;
b += (d ^ (a & (c ^ d))) + blocks[i + 12] - 1926607734;
b = ((b << 20 | b >>> 12) + c) << 0;
a += (d ^ (b & (c ^ d))) + blocks[4] - 176418897 << 0;
a = (a << 7 | a >>> 25) + b << 0;
d += (c ^ (a & (b ^ c))) + blocks[5] + 1200080426 << 0;
d = (d << 12 | d >>> 20) + a << 0;
c += (b ^ (d & (a ^ b))) + blocks[6] - 1473231341 << 0;
c = (c << 17 | c >>> 15) + d << 0;
b += (a ^ (c & (d ^ a))) + blocks[7] - 45705983 << 0;
b = (b << 22 | b >>> 10) + c << 0;
a += (d ^ (b & (c ^ d))) + blocks[8] + 1770035416 << 0;
a = (a << 7 | a >>> 25) + b << 0;
d += (c ^ (a & (b ^ c))) + blocks[9] - 1958414417 << 0;
d = (d << 12 | d >>> 20) + a << 0;
c += (b ^ (d & (a ^ b))) + blocks[10] - 42063 << 0;
c = (c << 17 | c >>> 15) + d << 0;
b += (a ^ (c & (d ^ a))) + blocks[11] - 1990404162 << 0;
b = (b << 22 | b >>> 10) + c << 0;
a += (d ^ (b & (c ^ d))) + blocks[12] + 1804603682 << 0;
a = (a << 7 | a >>> 25) + b << 0;
d += (c ^ (a & (b ^ c))) + blocks[13] - 40341101 << 0;
d = (d << 12 | d >>> 20) + a << 0;
c += (b ^ (d & (a ^ b))) + blocks[14] - 1502002290 << 0;
c = (c << 17 | c >>> 15) + d << 0;
b += (a ^ (c & (d ^ a))) + blocks[15] + 1236535329 << 0;
b = (b << 22 | b >>> 10) + c << 0;
a += (c ^ (d & (b ^ c))) + blocks[1] - 165796510 << 0;
a = (a << 5 | a >>> 27) + b << 0;
d += (b ^ (c & (a ^ b))) + blocks[6] - 1069501632 << 0;
d = (d << 9 | d >>> 23) + a << 0;
c += (a ^ (b & (d ^ a))) + blocks[11] + 643717713 << 0;
c = (c << 14 | c >>> 18) + d << 0;
b += (d ^ (a & (c ^ d))) + blocks[0] - 373897302 << 0;
b = (b << 20 | b >>> 12) + c << 0;
a += (c ^ (d & (b ^ c))) + blocks[5] - 701558691 << 0;
a = (a << 5 | a >>> 27) + b << 0;
d += (b ^ (c & (a ^ b))) + blocks[10] + 38016083 << 0;
d = (d << 9 | d >>> 23) + a << 0;
c += (a ^ (b & (d ^ a))) + blocks[15] - 660478335 << 0;
c = (c << 14 | c >>> 18) + d << 0;
b += (d ^ (a & (c ^ d))) + blocks[4] - 405537848 << 0;
b = (b << 20 | b >>> 12) + c << 0;
a += (c ^ (d & (b ^ c))) + blocks[9] + 568446438 << 0;
a = (a << 5 | a >>> 27) + b << 0;
d += (b ^ (c & (a ^ b))) + blocks[14] - 1019803690 << 0;
d = (d << 9 | d >>> 23) + a << 0;
c += (a ^ (b & (d ^ a))) + blocks[3] - 187363961 << 0;
c = (c << 14 | c >>> 18) + d << 0;
b += (d ^ (a & (c ^ d))) + blocks[8] + 1163531501 << 0;
b = (b << 20 | b >>> 12) + c << 0;
a += (c ^ (d & (b ^ c))) + blocks[13] - 1444681467 << 0;
a = (a << 5 | a >>> 27) + b << 0;
d += (b ^ (c & (a ^ b))) + blocks[2] - 51403784 << 0;
d = (d << 9 | d >>> 23) + a << 0;
c += (a ^ (b & (d ^ a))) + blocks[7] + 1735328473 << 0;
c = (c << 14 | c >>> 18) + d << 0;
b += (d ^ (a & (c ^ d))) + blocks[12] - 1926607734 << 0;
b = (b << 20 | b >>> 12) + c << 0;
bc = b ^ c;
a += (bc ^ d) + blocks[i + 5] - 378558;
a = ((a << 4 | a >>> 28) + b) << 0;
a += (bc ^ d) + blocks[5] - 378558 << 0;
a = (a << 4 | a >>> 28) + b << 0;
bc = b ^ c;
d += (bc ^ a) + blocks[i + 8] - 2022574463;
d = ((d << 11 | d >>> 21) + a) << 0;
d += (bc ^ a) + blocks[8] - 2022574463 << 0;
d = (d << 11 | d >>> 21) + a << 0;
da = d ^ a;
c += (da ^ b) + blocks[i + 11] + 1839030562;
c = ((c << 16 | c >>> 16) + d) << 0;
c += (da ^ b) + blocks[11] + 1839030562 << 0;
c = (c << 16 | c >>> 16) + d << 0;
da = d ^ a;
b += (da ^ c) + blocks[i + 14] - 35309556;
b = ((b << 23 | b >>> 9) + c) << 0;
b += (da ^ c) + blocks[14] - 35309556 << 0;
b = (b << 23 | b >>> 9) + c << 0;
bc = b ^ c;
a += (bc ^ d) + blocks[i + 1] - 1530992060;
a = ((a << 4 | a >>> 28) + b) << 0;
a += (bc ^ d) + blocks[1] - 1530992060 << 0;
a = (a << 4 | a >>> 28) + b << 0;
bc = b ^ c;
d += (bc ^ a) + blocks[i + 4] + 1272893353;
d = ((d << 11 | d >>> 21) + a) << 0;
d += (bc ^ a) + blocks[4] + 1272893353 << 0;
d = (d << 11 | d >>> 21) + a << 0;
da = d ^ a;
c += (da ^ b) + blocks[i + 7] - 155497632;
c = ((c << 16 | c >>> 16) + d) << 0;
c += (da ^ b) + blocks[7] - 155497632 << 0;
c = (c << 16 | c >>> 16) + d << 0;
da = d ^ a;
b += (da ^ c) + blocks[i + 10] - 1094730640;
b = ((b << 23 | b >>> 9) + c) << 0;
b += (da ^ c) + blocks[10] - 1094730640 << 0;
b = (b << 23 | b >>> 9) + c << 0;
bc = b ^ c;
a += (bc ^ d) + blocks[i + 13] + 681279174;
a = ((a << 4 | a >>> 28) + b) << 0;
a += (bc ^ d) + blocks[13] + 681279174 << 0;
a = (a << 4 | a >>> 28) + b << 0;
bc = b ^ c;
d += (bc ^ a) + blocks[i + 0] - 358537222;
d = ((d << 11 | d >>> 21) + a) << 0;
d += (bc ^ a) + blocks[0] - 358537222 << 0;
d = (d << 11 | d >>> 21) + a << 0;
da = d ^ a;
c += (da ^ b) + blocks[i + 3] - 722521979;
c = ((c << 16 | c >>> 16) + d) << 0;
c += (da ^ b) + blocks[3] - 722521979 << 0;
c = (c << 16 | c >>> 16) + d << 0;
da = d ^ a;
b += (da ^ c) + blocks[i + 6] + 76029189;
b = ((b << 23 | b >>> 9) + c) << 0;
b += (da ^ c) + blocks[6] + 76029189 << 0;
b = (b << 23 | b >>> 9) + c << 0;
bc = b ^ c;
a += (bc ^ d) + blocks[i + 9] - 640364487;
a = ((a << 4 | a >>> 28) + b) << 0;
a += (bc ^ d) + blocks[9] - 640364487 << 0;
a = (a << 4 | a >>> 28) + b << 0;
bc = b ^ c;
d += (bc ^ a) + blocks[i + 12] - 421815835;
d = ((d << 11 | d >>> 21) + a) << 0;
d += (bc ^ a) + blocks[12] - 421815835 << 0;
d = (d << 11 | d >>> 21) + a << 0;
da = d ^ a;
c += (da ^ b) + blocks[i + 15] + 530742520;
c = ((c << 16 | c >>> 16) + d) << 0;
c += (da ^ b) + blocks[15] + 530742520 << 0;
c = (c << 16 | c >>> 16) + d << 0;
da = d ^ a;
b += (da ^ c) + blocks[i + 2] - 995338651;
b = ((b << 23 | b >>> 9) + c) << 0;
a += (c ^ (b | ~d)) + blocks[i + 0] - 198630844;
a = ((a << 6 | a >>> 26) + b) << 0;
d += (b ^ (a | ~c)) + blocks[i + 7] + 1126891415;
d = ((d << 10 | d >>> 22) + a) << 0;
c += (a ^ (d | ~b)) + blocks[i + 14] - 1416354905;
c = ((c << 15 | c >>> 17) + d) << 0;
b += (d ^ (c | ~a)) + blocks[i + 5] - 57434055;
b = ((b << 21 | b >>> 11) + c) << 0;
a += (c ^ (b | ~d)) + blocks[i + 12] + 1700485571;
a = ((a << 6 | a >>> 26) + b) << 0;
d += (b ^ (a | ~c)) + blocks[i + 3] - 1894986606;
d = ((d << 10 | d >>> 22) + a) << 0;
c += (a ^ (d | ~b)) + blocks[i + 10] - 1051523;
c = ((c << 15 | c >>> 17) + d) << 0;
b += (d ^ (c | ~a)) + blocks[i + 1] - 2054922799;
b = ((b << 21 | b >>> 11) + c) << 0;
a += (c ^ (b | ~d)) + blocks[i + 8] + 1873313359;
a = ((a << 6 | a >>> 26) + b) << 0;
d += (b ^ (a | ~c)) + blocks[i + 15] - 30611744;
d = ((d << 10 | d >>> 22) + a) << 0;
c += (a ^ (d | ~b)) + blocks[i + 6] - 1560198380;
c = ((c << 15 | c >>> 17) + d) << 0;
b += (d ^ (c | ~a)) + blocks[i + 13] + 1309151649;
b = ((b << 21 | b >>> 11) + c) << 0;
a += (c ^ (b | ~d)) + blocks[i + 4] - 145523070;
a = ((a << 6 | a >>> 26) + b) << 0;
d += (b ^ (a | ~c)) + blocks[i + 11] - 1120210379;
d = ((d << 10 | d >>> 22) + a) << 0;
c += (a ^ (d | ~b)) + blocks[i + 2] + 718787259;
c = ((c << 15 | c >>> 17) + d) << 0;
b += (d ^ (c | ~a)) + blocks[i + 9] - 343485551;
b = ((b << 21 | b >>> 11) + c) << 0;
b += (da ^ c) + blocks[2] - 995338651 << 0;
b = (b << 23 | b >>> 9) + c << 0;
a += (c ^ (b | ~d)) + blocks[0] - 198630844 << 0;
a = (a << 6 | a >>> 26) + b << 0;
d += (b ^ (a | ~c)) + blocks[7] + 1126891415 << 0;
d = (d << 10 | d >>> 22) + a << 0;
c += (a ^ (d | ~b)) + blocks[14] - 1416354905 << 0;
c = (c << 15 | c >>> 17) + d << 0;
b += (d ^ (c | ~a)) + blocks[5] - 57434055 << 0;
b = (b << 21 | b >>> 11) + c << 0;
a += (c ^ (b | ~d)) + blocks[12] + 1700485571 << 0;
a = (a << 6 | a >>> 26) + b << 0;
d += (b ^ (a | ~c)) + blocks[3] - 1894986606 << 0;
d = (d << 10 | d >>> 22) + a << 0;
c += (a ^ (d | ~b)) + blocks[10] - 1051523 << 0;
c = (c << 15 | c >>> 17) + d << 0;
b += (d ^ (c | ~a)) + blocks[1] - 2054922799 << 0;
b = (b << 21 | b >>> 11) + c << 0;
a += (c ^ (b | ~d)) + blocks[8] + 1873313359 << 0;
a = (a << 6 | a >>> 26) + b << 0;
d += (b ^ (a | ~c)) + blocks[15] - 30611744 << 0;
d = (d << 10 | d >>> 22) + a << 0;
c += (a ^ (d | ~b)) + blocks[6] - 1560198380 << 0;
c = (c << 15 | c >>> 17) + d << 0;
b += (d ^ (c | ~a)) + blocks[13] + 1309151649 << 0;
b = (b << 21 | b >>> 11) + c << 0;
a += (c ^ (b | ~d)) + blocks[4] - 145523070 << 0;
a = (a << 6 | a >>> 26) + b << 0;
d += (b ^ (a | ~c)) + blocks[11] - 1120210379 << 0;
d = (d << 10 | d >>> 22) + a << 0;
c += (a ^ (d | ~b)) + blocks[2] + 718787259 << 0;
c = (c << 15 | c >>> 17) + d << 0;
b += (d ^ (c | ~a)) + blocks[9] - 343485551 << 0;
b = (b << 21 | b >>> 11) + c << 0;
h0 = (h0 + a) << 0;
h1 = (h1 + b) << 0;
h2 = (h2 + c) << 0;
h3 = (h3 + d) << 0;
}
h0 = h0 + a << 0;
h1 = h1 + b << 0;
h2 = h2 + c << 0;
h3 = h3 + d << 0;
} while(index < length);
return toHexString(h0) + toHexString(h1) + toHexString(h2) + toHexString(h3);
};
@@ -224,41 +295,7 @@
return bytes;
};
var getBlocksFromAscii = function(message) {
// a block is 32 bits(4 bytes), a chunk is 512 bits(64 bytes)
var length = message.length;
var chunkCount = ((length + 8) >> 6) + 1;
var blockCount = chunkCount << 4; // chunkCount * 16
var blocks = [], i;
for(i = 0;i < blockCount;++i) {
blocks[i] = 0;
}
for(i = 0;i < length;++i) {
blocks[i >> 2] |= message.charCodeAt(i) << ((i & 3) << 3);
}
blocks[i >> 2] |= 0x80 << ((i & 3) << 3);
blocks[blockCount - 2] = length << 3; // length * 8
return blocks;
};
var getBlocksFromUtf8 = function(message) {
var bytes = getBytesFromUtf8(message);
var length = bytes.length;
var chunkCount = ((length + 8) >> 6) + 1;
var blockCount = chunkCount << 4; // chunkCount * 16
var blocks = [], i;
for(i = 0;i < blockCount;++i) {
blocks[i] = 0;
}
for(i = 0;i < length;++i) {
blocks[i >> 2] |= bytes[i] << ((i & 3) << 3);
}
blocks[i >> 2] |= 0x80 << ((i & 3) << 3);
blocks[blockCount - 2] = length << 3; // length * 8
return blocks;
};
if(typeof(module) != 'undefined') {
if(!root.JS_MD5_TEST && typeof(module) != 'undefined') {
module.exports = md5;
} else if(root) {
root.md5 = md5;