1 /* Copyright (c) 2012 Robert Sesek <http://robert.sesek.com>
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:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
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.
23 if (typeof chrome
!== 'undefined') {
24 // TODO: load the extension JS
26 // TODO: load the hosted JS
29 document
.addEventListener('DOMContentLoaded', function() {
30 var controller
= new SkeletonKey(document
);
35 * SkeletonKey is view controller for generating secure passwords.
37 * @param {HTMLDocument} doc The document on which to operate.
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');
49 * The number of iterations to perform in PBKDF2.
52 SkeletonKey
.prototype.ITERATIONS
= 1000;
54 * The size of the key, in bytes.
57 SkeletonKey
.prototype.KEYSIZE
= 256/32;
60 * The minimum length of a password.
63 SkeletonKey
.prototype.MIN_LENGTH
= 6;
66 * Initializes event handlers for the page.
69 SkeletonKey
.prototype._init
= function() {
70 this._generateButton
.onclick
= this._onGenerate
.bind(this);
72 this._password
.labels
[0].onclick
= this._selectPassword
.bind(this);
76 * Event handler for generating a new password.
80 SkeletonKey
.prototype._onGenerate
= function(e
) {
81 var salt
= this._username
.value
+ '@' + this._sitekey
.value
;
83 // |key| is a WordArray of 32-bit words.
84 var key
= CryptoJS
.PBKDF2(this._master
.value
, salt
,
85 {keySize
: this.KEYSIZE
, iterations
: this.ITERATIONS
});
86 var hexString
= key
.toString();
87 hexString
= this._capitalizeKey(hexString
);
88 this._password
.value
= hexString
;
89 this._selectPassword();
93 * Takes a HEX string and returns a mixed-case string.
98 SkeletonKey
.prototype._capitalizeKey
= function(key
) {
99 // |key| is too long for a decent password, so try and use the second half of
100 // it as the basis for capitalizing the key.
101 var capsSource
= null;
102 var keyLength
= key
.length
;
103 if (keyLength
/ 2 <= this.MIN_LENGTH
) {
104 capsSouce
= key
.substr(0, keyLength
- this.MIN_LENGTH
);
106 capsSource
= key
.substr(keyLength
/ 2);
109 if (!capsSource
|| capsSource
.length
< 1) {
113 key
= key
.substr(0, capsSource
.length
);
114 var capsSourceLength
= capsSource
.length
;
118 for (var i
= 0; i
< key
.length
; i
++) {
119 var c
= key
.charCodeAt(i
);
120 // If this is not a lowercase letter or there's no more source, skip.
121 if (c
< 0x61 || c
> 0x7A || j
>= capsSourceLength
) {
126 var makeCap
= capsSource
.charCodeAt(j
++) % 2;
128 newKey
+= String
.fromCharCode(c
- 0x20);
137 * Selects the contents of the generated password.
140 SkeletonKey
.prototype._selectPassword
= function() {
141 this._password
.focus();
142 this._password
.select();