core.js

   1 /* Copyright (c) 2012 Robert Sesek <http://robert.sesek.com>
   2  *
   3  * Permission is hereby granted, free of charge, to any person obtaining a copy
   4  * of this software and associated documentation files (the "Software"), to
   5  * deal in the Software without restriction, including without limitation the
   6  * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
   7  * sell copies of the Software, and to permit persons to whom the Software is
   8  * furnished to do so, subject to the following conditions:
   9  *
  10  * The above copyright notice and this permission notice shall be included in
  11  * all copies or substantial portions of the Software.
  12  *
  13  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  14  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  15  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  16  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  17  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  18  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  19  * DEALINGS IN THE SOFTWARE.
  20  */
  21
  22 (function main() {
  23   if (typeof chrome !== 'undefined') {
  24     // TODO: load the extension JS
  25   } else {
  26     // TODO: load the hosted JS
  27   }
  28
  29   document.addEventListener('DOMContentLoaded', function() {
  30     var controller = new SkeletonKey(document);
  31   });
  32 })();
  33
  34 /**
  35  * SkeletonKey is view controller for generating secure passwords.
  36  *
  37  * @param {HTMLDocument} doc The document on which to operate.
  38  */
  39 var SkeletonKey = SkeletonKey || function(doc) {
  40   this._master = doc.getElementById('master');
  41   this._sitekey = doc.getElementById('sitekey');
  42   this._username = doc.getElementById('username');
  43   this._password = doc.getElementById('password');
  44   this._generateButton = doc.getElementById('generate');
  45
  46   this._options = new SkeletonKeyOptions();
  47
  48   this._init();
  49 };
  50
  51 /**
  52  * The number of iterations to perform in PBKDF2.
  53  * @const {int}
  54  */
  55 SkeletonKey.prototype.ITERATIONS = 1000;
  56 /**
  57  * The size of the key, in bytes.
  58  * @const {int}
  59  */
  60 SkeletonKey.prototype.KEYSIZE = 256/32;
  61
  62 /**
  63  * Initializes event handlers for the page.
  64  * @private
  65  */
  66 SkeletonKey.prototype._init = function() {
  67   this._generateButton.onclick = this._onGenerate.bind(this);
  68
  69   this._master.onkeyup = this._nextFieldInterceptor.bind(this);
  70   this._sitekey.onkeyup = this._nextFieldInterceptor.bind(this);
  71   this._username.onkeyup = this._nextFieldInterceptor.bind(this);
  72
  73   this._password.onclick = this._selectPassword.bind(this);
  74   this._password.labels[0].onclick = this._selectPassword.bind(this);
  75
  76   this._initChromeExtension();
  77
  78   this._master.focus();
  79 };
  80
  81 /**
  82  * Event handler for generating a new password.
  83  * @param {Event} e
  84  * @private
  85  */
  86 SkeletonKey.prototype._onGenerate = function(e) {
  87   var salt = this._username.value + '@' + this._sitekey.value;
  88
  89   // |key| is a WordArray of 32-bit words.
  90   var key = CryptoJS.PBKDF2(this._master.value, salt,
  91       {keySize: this.KEYSIZE, iterations: this.ITERATIONS});
  92   var hexString = key.toString();
  93   hexString = this._capitalizeKey(hexString);
  94   this._password.value = hexString;
  95   this._selectPassword();
  96 };
  97
  98 /**
  99  * Takes a HEX string and returns a mixed-case string.
 100  * @param {string} key
 101  * @return string
 102  * @private
 103  */
 104 SkeletonKey.prototype._capitalizeKey = function(key) {
 105   // |key| is too long for a decent password, so try and use the second half of
 106   // it as the basis for capitalizing the key.
 107   var capsSource = null;
 108   var keyLength = key.length;
 109   if (keyLength / 2 <= this._options.getMinimumPasswordLength()) {
 110     capsSouce = key.substr(0, keyLength - this._options.getMinimumPasswordLength());
 111   } else {
 112     capsSource = key.substr(keyLength / 2);
 113   }
 114
 115   if (!capsSource || capsSource.length < 1) {
 116     return key;
 117   }
 118
 119   key = key.substr(0, capsSource.length);
 120   var capsSourceLength = capsSource.length;
 121
 122   var j = 0;
 123   var newKey = "";
 124   for (var i = 0; i < key.length; i++) {
 125     var c = key.charCodeAt(i);
 126     // If this is not a lowercase letter or there's no more source, skip.
 127     if (c < 0x61 || c > 0x7A || j >= capsSourceLength) {
 128       newKey += key[i];
 129       continue;
 130     }
 131
 132     var makeCap = capsSource.charCodeAt(j++) % 2;
 133     if (makeCap)
 134       newKey += String.fromCharCode(c - 0x20);
 135     else
 136       newKey += key[i];
 137   }
 138
 139   return newKey;
 140 };
 141
 142 /**
 143  * Checks if the given key event is from the enter key and moves onto the next
 144  * field or generates the password.
 145  * @param {Event} e
 146  * @private
 147  */
 148 SkeletonKey.prototype._nextFieldInterceptor = function(e) {
 149   if (e.keyCode != 0xD)
 150     return;
 151
 152   if (this._master.value == "") {
 153     this._master.focus();
 154   } else if (this._sitekey.value == "") {
 155     this._sitekey.focus();
 156   } else if (this._username.value == "") {
 157     this._username.focus();
 158   } else {
 159     this._generateButton.click();
 160   }
 161 };
 162
 163 /**
 164  * Selects the contents of the generated password.
 165  * @private
 166  */
 167 SkeletonKey.prototype._selectPassword = function() {
 168   this._password.focus();
 169   this._password.select();
 170 };
 171
 172 /**
 173  * Initalizes the Chrome extension pieces if running inside chrome.
 174  * @private
 175  */
 176 SkeletonKey.prototype._initChromeExtension = function() {
 177   return;
 178   if (typeof chrome == 'undefined' || typeof chrome.extension == 'undefined')
 179     return;
 180
 181   // getCurrent is undefined for backround pages. Need content script.
 182   chrome.tabs.getCurrent(function (tab) {
 183     if (tab == null)
 184       return;
 185
 186     var url = tab.url;
 187     if (url == null || url == "")
 188       return;
 189
 190     var siteKey = url.search(/https?:\/\/(www.?|login|accounts?)\.(.*)\.(com?|net|org|edu|biz|info)?.*/);
 191     console.log(siteKey);
 192   });
 193 };