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136 lines
4.5 KiB
136 lines
4.5 KiB
/*
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* fingerprintJS 0.3 - Fast browser fingerprint library
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* https://github.com/Valve/fingerprintjs
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* Copyright (c) 2013 Valentin Vasilyev (iamvalentin@gmail.com)
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* Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) license.
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*/
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/*jslint browser: true, indent: 2 */
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(function(scope) {
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'use strict';
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var Fingerprint = function(hasher){
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var nativeForEach = Array.prototype.forEach;
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var nativeMap = Array.prototype.map;
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this.each = function(obj, iterator, context) {
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if(obj === null) return;
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if(nativeForEach && obj.forEach === nativeForEach) {
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obj.forEach(iterator, context);
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} else if (obj.length === +obj.length) {
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for (var i = 0, l = obj.length; i < l; i++) {
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if (iterator.call(context, obj[i], i, obj) === {}) return;
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}
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} else {
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for (var key in obj) {
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if (obj.hasOwnProperty(key)) {
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if (iterator.call(context, obj[key], key, obj) === {}) return;
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}
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}
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}
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};
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this.map = function(obj, iterator, context) {
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var results = [];
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if (obj == null) return results;
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if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
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this.each(obj, function(value, index, list) {
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results[results.length] = iterator.call(context, value, index, list);
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});
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return results;
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};
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if(hasher){
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this.hasher = hasher;
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}
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}
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Fingerprint.prototype = {
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get: function(){
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var keys = [];
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keys.push(navigator.userAgent);
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keys.push(navigator.language);
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keys.push(screen.colorDepth);
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keys.push(new Date().getTimezoneOffset());
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keys.push(!!window.sessionStorage);
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keys.push(!!window.localStorage);
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var pluginsString = this.map(navigator.plugins, function(p){
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var mimeTypes = this.map(p, function(mt){
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return [mt.type, mt.suffixes].join('~');
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}).join(',');
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return [p.name, p.description, mimeTypes].join('::');
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}, this).join(';');
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keys.push(pluginsString);
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if(this.hasher){
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return this.hasher(keys.join('###'), 31);
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} else {
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return this.murmurhash3_32_gc(keys.join('###'), 31);
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}
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},
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/**
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* JS Implementation of MurmurHash3 (r136) (as of May 20, 2011)
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*
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* @author <a href="mailto:gary.court@gmail.com">Gary Court</a>
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* @see http://github.com/garycourt/murmurhash-js
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* @author <a href="mailto:aappleby@gmail.com">Austin Appleby</a>
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* @see http://sites.google.com/site/murmurhash/
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*
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* @param {string} key ASCII only
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* @param {number} seed Positive integer only
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* @return {number} 32-bit positive integer hash
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*/
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murmurhash3_32_gc: function(key, seed) {
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var remainder, bytes, h1, h1b, c1, c1b, c2, c2b, k1, i;
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remainder = key.length & 3; // key.length % 4
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bytes = key.length - remainder;
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h1 = seed;
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c1 = 0xcc9e2d51;
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c2 = 0x1b873593;
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i = 0;
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while (i < bytes) {
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k1 =
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((key.charCodeAt(i) & 0xff)) |
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((key.charCodeAt(++i) & 0xff) << 8) |
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((key.charCodeAt(++i) & 0xff) << 16) |
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((key.charCodeAt(++i) & 0xff) << 24);
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++i;
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k1 = ((((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16))) & 0xffffffff;
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k1 = (k1 << 15) | (k1 >>> 17);
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k1 = ((((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16))) & 0xffffffff;
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h1 ^= k1;
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h1 = (h1 << 13) | (h1 >>> 19);
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h1b = ((((h1 & 0xffff) * 5) + ((((h1 >>> 16) * 5) & 0xffff) << 16))) & 0xffffffff;
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h1 = (((h1b & 0xffff) + 0x6b64) + ((((h1b >>> 16) + 0xe654) & 0xffff) << 16));
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}
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k1 = 0;
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switch (remainder) {
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case 3: k1 ^= (key.charCodeAt(i + 2) & 0xff) << 16;
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case 2: k1 ^= (key.charCodeAt(i + 1) & 0xff) << 8;
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case 1: k1 ^= (key.charCodeAt(i) & 0xff);
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k1 = (((k1 & 0xffff) * c1) + ((((k1 >>> 16) * c1) & 0xffff) << 16)) & 0xffffffff;
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k1 = (k1 << 15) | (k1 >>> 17);
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k1 = (((k1 & 0xffff) * c2) + ((((k1 >>> 16) * c2) & 0xffff) << 16)) & 0xffffffff;
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h1 ^= k1;
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}
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h1 ^= key.length;
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h1 ^= h1 >>> 16;
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h1 = (((h1 & 0xffff) * 0x85ebca6b) + ((((h1 >>> 16) * 0x85ebca6b) & 0xffff) << 16)) & 0xffffffff;
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h1 ^= h1 >>> 13;
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h1 = ((((h1 & 0xffff) * 0xc2b2ae35) + ((((h1 >>> 16) * 0xc2b2ae35) & 0xffff) << 16))) & 0xffffffff;
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h1 ^= h1 >>> 16;
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return h1 >>> 0;
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}
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}
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scope.Fingerprint = Fingerprint;
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})(window);
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