1   /**
2    * Copyright (c) 2000-2009 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.StringUtil;
26  import com.liferay.portal.kernel.util.Validator;
27  
28  /**
29   * <a href="PwdGenerator.java.html"><b><i>View Source</i></b></a>
30   *
31   * @author Brian Wing Shun Chan
32   * @author Amos Fong
33   *
34   */
35  public class PwdGenerator {
36  
37      public static String KEY1 = "0123456789";
38  
39      public static String KEY2 = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
40  
41      public static String KEY3 = "abcdefghijklmnopqrstuvwxyz";
42  
43      public static String getPinNumber() {
44          return _getPassword(KEY1, 4, true);
45      }
46  
47      public static String getPassword() {
48          return getPassword(8);
49      }
50  
51      public static String getPassword(int length) {
52          return _getPassword(KEY1 + KEY2 + KEY3, length, true);
53      }
54  
55      public static String getPassword(String key, int length) {
56          return getPassword(key, length, true);
57      }
58  
59      public static String getPassword(
60          String key, int length, boolean useAllKeys) {
61  
62          return _getPassword(key, length, useAllKeys);
63      }
64  
65      private static String _getPassword(
66          String key, int length, boolean useAllKeys) {
67  
68          StringBuilder sb = new StringBuilder();
69  
70          for (int i = 0; i < length; i++) {
71              sb.append(key.charAt((int)(Math.random() * key.length())));
72          }
73  
74          String password = sb.toString();
75  
76          if (!useAllKeys) {
77              return password;
78          }
79  
80          boolean invalidPassword = false;
81  
82          if (key.contains(KEY1)) {
83              if (Validator.isNull(StringUtil.extractDigits(password))) {
84                  invalidPassword = true;
85              }
86          }
87  
88          if (key.contains(KEY2)) {
89              if (password.equals(password.toLowerCase())) {
90                  invalidPassword = true;
91              }
92          }
93  
94          if (key.contains(KEY3)) {
95              if (password.equals(password.toUpperCase())) {
96                  invalidPassword = true;
97              }
98          }
99  
100         if (invalidPassword) {
101             return _getPassword(key, length, useAllKeys);
102         }
103 
104         return password;
105     }
106 
107 }