1   /**
2    * Copyright (c) 2000-2007 Liferay, Inc. All rights reserved.
3    *
4    * Permission is hereby granted, free of charge, to any person obtaining a copy
5    * of this software and associated documentation files (the "Software"), to deal
6    * in the Software without restriction, including without limitation the rights
7    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8    * copies of the Software, and to permit persons to whom the Software is
9    * furnished to do so, subject to the following conditions:
10   *
11   * The above copyright notice and this permission notice shall be included in
12   * all copies or substantial portions of the Software.
13   *
14   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20   * SOFTWARE.
21   */
22  
23  package com.liferay.util;
24  
25  import com.liferay.portal.kernel.util.StringMaker;
26  
27  /**
28   * <a href="PwdGenerator.java.html"><b><i>View Source</i></b></a>
29   *
30   * @author Brian Wing Shun Chan
31   *
32   */
33  public class PwdGenerator {
34  
35      public static String KEY1 = "0123456789";
36  
37      public static String KEY2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
38  
39      public static String KEY3 = "abcdefghijklmnopqrstuvwxyz";
40  
41      public static String getPinNumber() {
42          return _getPassword(KEY1, 4);
43      }
44  
45      public static String getPassword() {
46          return getPassword(8);
47      }
48  
49      public static String getPassword(int length) {
50          return _getPassword(KEY1 + KEY2 + KEY3, length);
51      }
52  
53      public static String getPassword(String key, int length) {
54          return _getPassword(key, length);
55      }
56  
57      private static String _getPassword(String key, int length) {
58          StringMaker sm = new StringMaker();
59  
60          for (int i = 0; i < length; i++) {
61              sm.append(key.charAt((int)(Math.random() * key.length())));
62          }
63  
64          return sm.toString();
65      }
66  
67  }