fingerprint.js

/*
* fingerprintJS 0.5.5cpv - crockpotveggies
* https://github.com/Valve/fingerprintjs
* Copyright (c) 2013 Valentin Vasilyev (valentin.vasilyev@outlook.com)
* Licensed under the MIT (http://www.opensource.org/licenses/mit-license.php) license.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

;(function (name, context, definition) {
  if (typeof module !== 'undefined' && module.exports) { module.exports = definition(); }
  else if (typeof define === 'function' && define.amd) { define(definition); }
  else { context[name] = definition(); }
})('Fingerprint', this, function () {
  'use strict';

  var Fingerprint = function (options) {
    var nativeForEach, nativeMap;
    nativeForEach = Array.prototype.forEach;
    nativeMap = Array.prototype.map;

    this.each = function (obj, iterator, context) {
      if (obj === null) {
        return;
      }
      if (nativeForEach && obj.forEach === nativeForEach) {
        obj.forEach(iterator, context);
      } else if (obj.length === +obj.length) {
        for (var i = 0, l = obj.length; i < l; i++) {
          if (iterator.call(context, obj[i], i, obj) === {}) return;
        }
      } else {
        for (var key in obj) {
          if (obj.hasOwnProperty(key)) {
            if (iterator.call(context, obj[key], key, obj) === {}) return;
          }
        }
      }
    };

    this.map = function(obj, iterator, context) {
      var results = [];
      // Not using strict equality so that this acts as a
      // shortcut to checking for `null` and `undefined`.
      if (obj == null) return results;
      if (nativeMap && obj.map === nativeMap) return obj.map(iterator, context);
      this.each(obj, function(value, index, list) {
        results[results.length] = iterator.call(context, value, index, list);
      });
      return results;
    };

    if ( typeof options == 'object' ){
      this.hasher = options.hasher;
      this.screen_resolution = options.screen_resolution;
      this.canvas = options.canvas;
      this.ie_activex = options.ie_activex;
      if ( typeof options.flash.path == 'string' )
      {
        // add placeholder to global scope
        window.__global_fingerprints = {};
        this.flashParameters(options.flash);
        /* store this instance in the global namespace
         * so Flash can access it when loaded
         */
        __global_fingerprints[this.flash.id] = this;
        // trigger loading the flash app
        this.loadSwf();
        this.useFlash = true;
      }
      else
      {
        this.useFlash = false;
      }
      
    } else if(typeof options == 'function'){
      this.hasher = options;
    }
  };

  Fingerprint.prototype = {
    get: function(){
      var keys = [];
      keys.push(navigator.cookieEnabled.toString());
      keys.push(navigator.javaEnabled().toString());
      keys.push(navigator.appName);
      keys.push(navigator.userAgent);
      keys.push(navigator.language);
      keys.push(screen.colorDepth);
      if(typeof navigator.hardwareConcurrency != 'undefined') {
        keys.push(navigator.hardwareConcurrency);
      }
      if(typeof navigator.maxTouchPoints != 'undefined') {
        keys.push(navigator.maxTouchPoints);
      }
      if(typeof navigator.getGamepads != 'undefined') {
        keys.push(JSON.stringify(navigator.getGamepads));
      }
      if(typeof navigator.cpuClass != 'undefined') {
        keys.push(navigator.cpuClass);
      }
      if(typeof navigator.mimeTypes != 'undefined') {
        keys.push(navigator.mimeTypes.length);
      }
      if (this.screen_resolution) {
        var resolution = this.getScreenResolution();
        if (typeof resolution !== 'undefined'){ // headless browsers, such as phantomjs
          keys.push(this.getScreenResolution().join('x'));
        }
      }
      keys.push(new Date().getTimezoneOffset());
      keys.push(this.hasSessionStorage());
      keys.push(this.hasLocalStorage());
      keys.push(!!window.indexedDB);
      //body might not be defined at this point or removed programmatically
      if(document.body){
        keys.push(typeof(document.body.addBehavior));
      } else {
        keys.push(typeof undefined);
      }
      keys.push(typeof(window.openDatabase));
      keys.push(typeof(navigator.geolocation));
      keys.push(typeof(navigator.getStorageUpdates));
      keys.push(navigator.platform);
      keys.push(navigator.doNotTrack);
      keys.push(this.getPluginsString());
      if(this.canvas && this.isCanvasSupported()){
        keys.push(this.getCanvasFingerprint());
      }
      if(this.useFlash) {
        keys.push(this.font_list);
      }
      if(this.hasher){
        return this.hasher(keys.join('###'), 31);
      } else {
        return this.md5(keys.join('###'));
      }
    },

    /*
     * jQuery MD5 Plugin 1.2.1
     * https://github.com/blueimp/jQuery-MD5
     *
     * Copyright 2010, Sebastian Tschan
     * https://blueimp.net
     *
     * Licensed under the MIT license:
     * http://creativecommons.org/licenses/MIT/
     *
     * Based on
     * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
     * Digest Algorithm, as defined in RFC 1321.
     * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
     * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
     * Distributed under the BSD License
     * See http://pajhome.org.uk/crypt/md5 for more info.
     */

    /*jslint bitwise: true */
    /*global unescape, jQuery */
    md5: function (string, key, raw) {
      'use strict';

      /*
      * Add integers, wrapping at 2^32. This uses 16-bit operations internally
      * to work around bugs in some JS interpreters.
      */
      function safe_add(x, y) {
          var lsw = (x & 0xFFFF) + (y & 0xFFFF),
              msw = (x >> 16) + (y >> 16) + (lsw >> 16);
          return (msw << 16) | (lsw & 0xFFFF);
      }

      /*
      * Bitwise rotate a 32-bit number to the left.
      */
      function bit_rol(num, cnt) {
          return (num << cnt) | (num >>> (32 - cnt));
      }

      /*
      * These functions implement the four basic operations the algorithm uses.
      */
      function md5_cmn(q, a, b, x, s, t) {
          return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
      }
      function md5_ff(a, b, c, d, x, s, t) {
          return md5_cmn((b & c) | ((~b) & d), a, b, x, s, t);
      }
      function md5_gg(a, b, c, d, x, s, t) {
          return md5_cmn((b & d) | (c & (~d)), a, b, x, s, t);
      }
      function md5_hh(a, b, c, d, x, s, t) {
          return md5_cmn(b ^ c ^ d, a, b, x, s, t);
      }
      function md5_ii(a, b, c, d, x, s, t) {
          return md5_cmn(c ^ (b | (~d)), a, b, x, s, t);
      }

      /*
      * Calculate the MD5 of an array of little-endian words, and a bit length.
      */
      function binl_md5(x, len) {
          /* append padding */
          x[len >> 5] |= 0x80 << ((len) % 32);
          x[(((len + 64) >>> 9) << 4) + 14] = len;

          var i, olda, oldb, oldc, oldd,
              a =  1732584193,
              b = -271733879,
              c = -1732584194,
              d =  271733878;

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

              a = md5_ff(a, b, c, d, x[i],       7, -680876936);
              d = md5_ff(d, a, b, c, x[i +  1], 12, -389564586);
              c = md5_ff(c, d, a, b, x[i +  2], 17,  606105819);
              b = md5_ff(b, c, d, a, x[i +  3], 22, -1044525330);
              a = md5_ff(a, b, c, d, x[i +  4],  7, -176418897);
              d = md5_ff(d, a, b, c, x[i +  5], 12,  1200080426);
              c = md5_ff(c, d, a, b, x[i +  6], 17, -1473231341);
              b = md5_ff(b, c, d, a, x[i +  7], 22, -45705983);
              a = md5_ff(a, b, c, d, x[i +  8],  7,  1770035416);
              d = md5_ff(d, a, b, c, x[i +  9], 12, -1958414417);
              c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
              b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
              a = md5_ff(a, b, c, d, x[i + 12],  7,  1804603682);
              d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
              c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
              b = md5_ff(b, c, d, a, x[i + 15], 22,  1236535329);

              a = md5_gg(a, b, c, d, x[i +  1],  5, -165796510);
              d = md5_gg(d, a, b, c, x[i +  6],  9, -1069501632);
              c = md5_gg(c, d, a, b, x[i + 11], 14,  643717713);
              b = md5_gg(b, c, d, a, x[i],      20, -373897302);
              a = md5_gg(a, b, c, d, x[i +  5],  5, -701558691);
              d = md5_gg(d, a, b, c, x[i + 10],  9,  38016083);
              c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
              b = md5_gg(b, c, d, a, x[i +  4], 20, -405537848);
              a = md5_gg(a, b, c, d, x[i +  9],  5,  568446438);
              d = md5_gg(d, a, b, c, x[i + 14],  9, -1019803690);
              c = md5_gg(c, d, a, b, x[i +  3], 14, -187363961);
              b = md5_gg(b, c, d, a, x[i +  8], 20,  1163531501);
              a = md5_gg(a, b, c, d, x[i + 13],  5, -1444681467);
              d = md5_gg(d, a, b, c, x[i +  2],  9, -51403784);
              c = md5_gg(c, d, a, b, x[i +  7], 14,  1735328473);
              b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);

              a = md5_hh(a, b, c, d, x[i +  5],  4, -378558);
              d = md5_hh(d, a, b, c, x[i +  8], 11, -2022574463);
              c = md5_hh(c, d, a, b, x[i + 11], 16,  1839030562);
              b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
              a = md5_hh(a, b, c, d, x[i +  1],  4, -1530992060);
              d = md5_hh(d, a, b, c, x[i +  4], 11,  1272893353);
              c = md5_hh(c, d, a, b, x[i +  7], 16, -155497632);
              b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
              a = md5_hh(a, b, c, d, x[i + 13],  4,  681279174);
              d = md5_hh(d, a, b, c, x[i],      11, -358537222);
              c = md5_hh(c, d, a, b, x[i +  3], 16, -722521979);
              b = md5_hh(b, c, d, a, x[i +  6], 23,  76029189);
              a = md5_hh(a, b, c, d, x[i +  9],  4, -640364487);
              d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
              c = md5_hh(c, d, a, b, x[i + 15], 16,  530742520);
              b = md5_hh(b, c, d, a, x[i +  2], 23, -995338651);

              a = md5_ii(a, b, c, d, x[i],       6, -198630844);
              d = md5_ii(d, a, b, c, x[i +  7], 10,  1126891415);
              c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
              b = md5_ii(b, c, d, a, x[i +  5], 21, -57434055);
              a = md5_ii(a, b, c, d, x[i + 12],  6,  1700485571);
              d = md5_ii(d, a, b, c, x[i +  3], 10, -1894986606);
              c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
              b = md5_ii(b, c, d, a, x[i +  1], 21, -2054922799);
              a = md5_ii(a, b, c, d, x[i +  8],  6,  1873313359);
              d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
              c = md5_ii(c, d, a, b, x[i +  6], 15, -1560198380);
              b = md5_ii(b, c, d, a, x[i + 13], 21,  1309151649);
              a = md5_ii(a, b, c, d, x[i +  4],  6, -145523070);
              d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
              c = md5_ii(c, d, a, b, x[i +  2], 15,  718787259);
              b = md5_ii(b, c, d, a, x[i +  9], 21, -343485551);

              a = safe_add(a, olda);
              b = safe_add(b, oldb);
              c = safe_add(c, oldc);
              d = safe_add(d, oldd);
          }
          return [a, b, c, d];
      }

      /*
      * Convert an array of little-endian words to a string
      */
      function binl2rstr(input) {
          var i,
              output = '';
          for (i = 0; i < input.length * 32; i += 8) {
              output += String.fromCharCode((input[i >> 5] >>> (i % 32)) & 0xFF);
          }
          return output;
      }

      /*
      * Convert a raw string to an array of little-endian words
      * Characters >255 have their high-byte silently ignored.
      */
      function rstr2binl(input) {
          var i,
              output = [];
          output[(input.length >> 2) - 1] = undefined;
          for (i = 0; i < output.length; i += 1) {
              output[i] = 0;
          }
          for (i = 0; i < input.length * 8; i += 8) {
              output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << (i % 32);
          }
          return output;
      }

      /*
      * Calculate the MD5 of a raw string
      */
      function rstr_md5(s) {
          return binl2rstr(binl_md5(rstr2binl(s), s.length * 8));
      }

      /*
      * Calculate the HMAC-MD5, of a key and some data (raw strings)
      */
      function rstr_hmac_md5(key, data) {
          var i,
              bkey = rstr2binl(key),
              ipad = [],
              opad = [],
              hash;
          ipad[15] = opad[15] = undefined;
          if (bkey.length > 16) {
              bkey = binl_md5(bkey, key.length * 8);
          }
          for (i = 0; i < 16; i += 1) {
              ipad[i] = bkey[i] ^ 0x36363636;
              opad[i] = bkey[i] ^ 0x5C5C5C5C;
          }
          hash = binl_md5(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
          return binl2rstr(binl_md5(opad.concat(hash), 512 + 128));
      }

      /*
      * Convert a raw string to a hex string
      */
      function rstr2hex(input) {
          var hex_tab = '0123456789abcdef',
              output = '',
              x,
              i;
          for (i = 0; i < input.length; i += 1) {
              x = input.charCodeAt(i);
              output += hex_tab.charAt((x >>> 4) & 0x0F) +
                  hex_tab.charAt(x & 0x0F);
          }
          return output;
      }

      /*
      * Encode a string as utf-8
      */
      function str2rstr_utf8(input) {
          return unescape(encodeURIComponent(input));
      }

      /*
      * Take string arguments and return either raw or hex encoded strings
      */
      function raw_md5(s) {
          return rstr_md5(str2rstr_utf8(s));
      }
      function hex_md5(s) {
          return rstr2hex(raw_md5(s));
      }
      function raw_hmac_md5(k, d) {
          return rstr_hmac_md5(str2rstr_utf8(k), str2rstr_utf8(d));
      }
      function hex_hmac_md5(k, d) {
          return rstr2hex(raw_hmac_md5(k, d));
      }
      if (!key) {
          if (!raw) {
              return hex_md5(string);
          } else {
              return raw_md5(string);
          }
      }
      if (!raw) {
          return hex_hmac_md5(key, string);
      } else {
          return raw_hmac_md5(key, string);
      }
    },

    // https://bugzilla.mozilla.org/show_bug.cgi?id=781447
    hasLocalStorage: function () {
      try{
        return !!window.localStorage;
      } catch(e) {
        return true; // SecurityError when referencing it means it exists
      }
    },

    hasSessionStorage: function () {
      try{
        return !!window.sessionStorage;
      } catch(e) {
        return true; // SecurityError when referencing it means it exists
      }
    },

    isCanvasSupported: function () {
      var elem = document.createElement('canvas');
      return !!(elem.getContext && elem.getContext('2d'));
    },

    isIE: function () {
      if(navigator.appName === 'Microsoft Internet Explorer') {
        return true;
      } else if(navigator.appName === 'Netscape' && /Trident/.test(navigator.userAgent)){// IE 11
        return true;
      }
      return false;
    },

    getPluginsString: function () {
      if(this.isIE() && this.ie_activex){
        return this.getIEPluginsString();
      } else {
        return this.getRegularPluginsString();
      }
    },

    getRegularPluginsString: function () {
      return this.map(navigator.plugins, function (p) {
        var mimeTypes = this.map(p, function(mt){
          return [mt.type, mt.suffixes].join('~');
        }).join(',');
        return [p.name, p.description, mimeTypes].join('::');
      }, this).join(';');
    },

    getIEPluginsString: function () {
      if(window.ActiveXObject){
        var names = ['ShockwaveFlash.ShockwaveFlash',//flash plugin
          'AcroPDF.PDF', // Adobe PDF reader 7+
          'PDF.PdfCtrl', // Adobe PDF reader 6 and earlier, brrr
          'QuickTime.QuickTime', // QuickTime
          // 5 versions of real players
          'rmocx.RealPlayer G2 Control',
          'rmocx.RealPlayer G2 Control.1',
          'RealPlayer.RealPlayer(tm) ActiveX Control (32-bit)',
          'RealVideo.RealVideo(tm) ActiveX Control (32-bit)',
          'RealPlayer',
          'SWCtl.SWCtl', // ShockWave player
          'WMPlayer.OCX', // Windows media player
          'AgControl.AgControl', // Silverlight
          'Skype.Detection'];

        // starting to detect plugins in IE
        return this.map(names, function(name){
          try{
            new ActiveXObject(name);
            return name;
          } catch(e){
            return null;
          }
        }).join(';');
      } else {
        return ""; // behavior prior version 0.5.0, not breaking backwards compat.
      }
    },

    getScreenResolution: function () {
      return [screen.height, screen.width];
    },

    getCanvasFingerprint: function () {
      var canvas = document.createElement('canvas');
      var ctx = canvas.getContext('2d');
      // https://www.browserleaks.com/canvas#how-does-it-work
      var txt = 'http://valve.github.io';
      ctx.textBaseline = "top";
      ctx.font = "14px 'Arial'";
      ctx.textBaseline = "alphabetic";
      ctx.fillStyle = "#f60";
      ctx.fillRect(125,1,62,20);
      ctx.fillStyle = "#069";
      ctx.fillText(txt, 2, 15);
      ctx.fillStyle = "rgba(102, 204, 0, 0.7)";
      ctx.fillText(txt, 4, 17);
      return canvas.toDataURL();
    },
    
    hasPlugin: function(name) {
      var plugins = this.getPluginsString();
      if ( typeof( plugins ) == 'string' && plugins.match(name) )
        return true;
      return false;
    },

    flashParameters: function(flashOptions) {
      if ( typeof flashOptions == 'object' )
      {
        // load default values
        this.flash = {};
        this.flash.id = 'fingerprint-js-flash';
        this.flash.swf = flashOptions.path;
        this.addFlashDiv();
      }
      else
        this.flash = options;
    },
    addFlashDiv: function() {
      var node = document.createElement('div');
      node.setAttribute("id", this.flash.id);
      node.setAttribute("style", "'width': 1px; height: 1px;");
      document.body.appendChild(node);
    },
    loadSwf: function() {
      if ( ! this.hasPlugin(/flash/i) )
        return undefined;
      var flashvars = { onReady: "__global_fingerprints['" + this.flash.id + "'].swfReady", swfObjectId: this.flash.id };
      var params = { allowScriptAccess: "always", menu: "false" };
      var attributes = { 'id': this.flash.id, name: this.flash.id };
      swfobject.embedSWF(this.flash.swf, this.flash.id, "1", "1", "9.0.0", false, flashvars, params, attributes); 
    },
    swfReady: function(id) {
      var swfElement = document.getElementById(id);
      this.font_list = swfElement.fonts().join(";");
      var hash = this.computeHash();
      this.callback(hash);
    }
  };


  return Fingerprint;

});