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.servlet;
24  
25  import com.liferay.portal.kernel.util.StringPool;
26  import com.liferay.portal.kernel.util.Validator;
27  import com.liferay.util.Encryptor;
28  import com.liferay.util.EncryptorException;
29  
30  import java.security.Key;
31  
32  import java.util.Collections;
33  import java.util.Enumeration;
34  import java.util.HashMap;
35  import java.util.Map;
36  
37  import javax.servlet.http.HttpServletRequest;
38  import javax.servlet.http.HttpServletRequestWrapper;
39  
40  /**
41   * <a href="EncryptedServletRequest.java.html"><b><i>View Source</i></b></a>
42   *
43   * @author Brian Wing Shun Chan
44   *
45   */
46  public class EncryptedServletRequest extends HttpServletRequestWrapper {
47  
48      public EncryptedServletRequest(HttpServletRequest request, Key key) {
49          super(request);
50  
51          _params = new HashMap<String, String[]>();
52          _key = key;
53  
54          Enumeration<String> enu = getParameterNames();
55  
56          while (enu.hasMoreElements()) {
57              String name = enu.nextElement();
58              String[] values = super.getParameterValues(name);
59  
60              for (int i = 0; i < values.length; i++) {
61                  if (Validator.isNotNull(values[i])) {
62                      try {
63                          values[i] = Encryptor.decrypt(_key, values[i]);
64                      }
65                      catch (EncryptorException ee) {
66                          values[i] = StringPool.BLANK;
67                      }
68                  }
69              }
70  
71              _params.put(name, values);
72          }
73      }
74  
75      public String getParameter(String name) {
76          String[] values = _params.get(name);
77  
78          if ((values != null) && (values.length > 0)) {
79              return values[0];
80          }
81          else {
82              return null;
83          }
84      }
85  
86      public Map<String, String[]> getParameterMap() {
87          return Collections.unmodifiableMap(_params);
88      }
89  
90      public String[] getParameterValues(String name) {
91          return _params.get(name);
92      }
93  
94      private Map<String, String[]> _params;
95      private Key _key;
96  
97  }