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* Improve performance.

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This commit is contained in:
Chen Yi-Cyuan
2015-01-13 22:34:27 +08:00
parent dca3e8c59d
commit 96036975f7
5 changed files with 50 additions and 39 deletions
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src/md5.js
+33 -27
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@@ -1,5 +1,5 @@
/*
* js-md5 v0.2.0
* js-md5 v0.2.1
* https://github.com/emn178/js-md5
*
* Copyright 2014-2015, emn178@gmail.com
@@ -15,22 +15,30 @@
root = global;
}
var ARRAY_BUFFER = !root.JS_MD5_TEST && typeof(ArrayBuffer) != 'undefined';
var HEX_CHARS = '0123456789abcdef'.split('');
var EXTRA = [128, 32768, 8388608, -2147483648];
var SHIFT = [0, 8, 16, 24];
var blocks = [], buffer8;
var blocks = [], buffer8, nodeMd5;
if(ARRAY_BUFFER) {
var buffer = new ArrayBuffer(68);
buffer8 = new Uint8Array(buffer);
blocks = new Uint32Array(buffer);
}
var EXTRA = [128, 32768, 8388608, -2147483648];
var SHIFT = [0, 8, 16, 24];
if(!root.JS_MD5_TEST && NODE_JS) {
var crypto = require('crypto');
nodeMd5 = function(message) {
return crypto.createHash('md5').update(message, 'utf8').digest('hex');
};
}
var md5 = function(message) {
var h0, h1, h2, h3, a, b, c, d, bc, da, code,
index = 0, i, start = 0, bytes = 0, length = message.length;
if(nodeMd5 && length > 22) {
return nodeMd5(message);
}
blocks[16] = 0;
do {
blocks[0] = blocks[16];
@@ -89,11 +97,11 @@
if(h0 === undefined) {
a = blocks[0] - 680876937;
a = (a << 7 | a >>> 25) - 271733879 << 0;
d = blocks[1] - 117830708 + ((2004318071 & a) ^ -1732584194);
d = (-1732584194 ^ a & 2004318071) + blocks[1] - 117830708;
d = (d << 12 | d >>> 20) + a << 0;
c = blocks[2] - 1126478375 + (((a ^ -271733879) & d) ^ -271733879);
c = (-271733879 ^ (d & (a ^ -271733879))) + blocks[2] - 1126478375;
c = (c << 17 | c >>> 15) + d << 0;
b = blocks[3] - 1316259209 + (((d ^ a) & c) ^ a);
b = (a ^ (c & (d ^ a))) + blocks[3] - 1316259209;
b = (b << 22 | b >>> 10) + c << 0;
} else {
a = h0;
@@ -169,49 +177,41 @@
bc = b ^ c;
a += (bc ^ d) + blocks[5] - 378558;
a = (a << 4 | a >>> 28) + b << 0;
bc = b ^ c;
d += (bc ^ a) + blocks[8] - 2022574463;
d = (d << 11 | d >>> 21) + a << 0;
da = d ^ a;
c += (da ^ b) + blocks[11] + 1839030562;
c = (c << 16 | c >>> 16) + d << 0;
da = d ^ a;
b += (da ^ c) + blocks[14] - 35309556;
b = (b << 23 | b >>> 9) + c << 0;
bc = b ^ c;
a += (bc ^ d) + blocks[1] - 1530992060;
a = (a << 4 | a >>> 28) + b << 0;
bc = b ^ c;
d += (bc ^ a) + blocks[4] + 1272893353;
d = (d << 11 | d >>> 21) + a << 0;
da = d ^ a;
c += (da ^ b) + blocks[7] - 155497632;
c = (c << 16 | c >>> 16) + d << 0;
da = d ^ a;
b += (da ^ c) + blocks[10] - 1094730640;
b = (b << 23 | b >>> 9) + c << 0;
bc = b ^ c;
a += (bc ^ d) + blocks[13] + 681279174;
a = (a << 4 | a >>> 28) + b << 0;
bc = b ^ c;
d += (bc ^ a) + blocks[0] - 358537222;
d = (d << 11 | d >>> 21) + a << 0;
da = d ^ a;
c += (da ^ b) + blocks[3] - 722521979;
c = (c << 16 | c >>> 16) + d << 0;
da = d ^ a;
b += (da ^ c) + blocks[6] + 76029189;
b = (b << 23 | b >>> 9) + c << 0;
bc = b ^ c;
a += (bc ^ d) + blocks[9] - 640364487;
a = (a << 4 | a >>> 28) + b << 0;
bc = b ^ c;
d += (bc ^ a) + blocks[12] - 421815835;
d = (d << 11 | d >>> 21) + a << 0;
da = d ^ a;
c += (da ^ b) + blocks[15] + 530742520;
c = (c << 16 | c >>> 16) + d << 0;
da = d ^ a;
b += (da ^ c) + blocks[2] - 995338651;
b = (b << 23 | b >>> 9) + c << 0;
a += (c ^ (b | ~d)) + blocks[0] - 198630844;
@@ -249,7 +249,7 @@
if(h0 === undefined) {
h0 = a + 1732584193 << 0;
h1 = b - 271733879<< 0;
h1 = b - 271733879 << 0;
h2 = c - 1732584194 << 0;
h3 = d + 271733878 << 0;
} else {
@@ -260,16 +260,22 @@
}
} while(index < length);
return toHexString(h0) + toHexString(h1) + toHexString(h2) + toHexString(h3);
};
var toHexString = function(num) {
var hex = '';
for(var i = 0; i < 4; i++) {
var offset = i << 3;
hex += HEX_CHARS[(num >> (offset + 4)) & 0x0F] + HEX_CHARS[(num >> offset) & 0x0F];
}
return hex;
return HEX_CHARS[(h0 >> 4) & 0x0F] + HEX_CHARS[h0 & 0x0F] +
HEX_CHARS[(h0 >> 12) & 0x0F] + HEX_CHARS[(h0 >> 8) & 0x0F] +
HEX_CHARS[(h0 >> 20) & 0x0F] + HEX_CHARS[(h0 >> 16) & 0x0F] +
HEX_CHARS[(h0 >> 28) & 0x0F] + HEX_CHARS[(h0 >> 24) & 0x0F] +
HEX_CHARS[(h1 >> 4) & 0x0F] + HEX_CHARS[h1 & 0x0F] +
HEX_CHARS[(h1 >> 12) & 0x0F] + HEX_CHARS[(h1 >> 8) & 0x0F] +
HEX_CHARS[(h1 >> 20) & 0x0F] + HEX_CHARS[(h1 >> 16) & 0x0F] +
HEX_CHARS[(h1 >> 28) & 0x0F] + HEX_CHARS[(h1 >> 24) & 0x0F] +
HEX_CHARS[(h2 >> 4) & 0x0F] + HEX_CHARS[h2 & 0x0F] +
HEX_CHARS[(h2 >> 12) & 0x0F] + HEX_CHARS[(h2 >> 8) & 0x0F] +
HEX_CHARS[(h2 >> 20) & 0x0F] + HEX_CHARS[(h2 >> 16) & 0x0F] +
HEX_CHARS[(h2 >> 28) & 0x0F] + HEX_CHARS[(h2 >> 24) & 0x0F] +
HEX_CHARS[(h3 >> 4) & 0x0F] + HEX_CHARS[h3 & 0x0F] +
HEX_CHARS[(h3 >> 12) & 0x0F] + HEX_CHARS[(h3 >> 8) & 0x0F] +
HEX_CHARS[(h3 >> 20) & 0x0F] + HEX_CHARS[(h3 >> 16) & 0x0F] +
HEX_CHARS[(h3 >> 28) & 0x0F] + HEX_CHARS[(h3 >> 24) & 0x0F];
};
if(!root.JS_MD5_TEST && NODE_JS) {