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1   /*
2    * Copyright (c) 2002-2025, City of Paris
3    * All rights reserved.
4    *
5    * Redistribution and use in source and binary forms, with or without
6    * modification, are permitted provided that the following conditions
7    * are met:
8    *
9    *  1. Redistributions of source code must retain the above copyright notice
10   *     and the following disclaimer.
11   *
12   *  2. Redistributions in binary form must reproduce the above copyright notice
13   *     and the following disclaimer in the documentation and/or other materials
14   *     provided with the distribution.
15   *
16   *  3. Neither the name of 'Mairie de Paris' nor 'Lutece' nor the names of its
17   *     contributors may be used to endorse or promote products derived from
18   *     this software without specific prior written permission.
19   *
20   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
21   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE
24   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
25   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
26   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
27   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
28   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
29   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30   * POSSIBILITY OF SUCH DAMAGE.
31   *
32   * License 1.0
33   */
34  package fr.paris.lutece.portal.web.xss;
35  
36  import javax.servlet.http.HttpServletRequest;
37  import javax.servlet.http.HttpServletRequestWrapper;
38  
39  import fr.paris.lutece.portal.service.html.XSSSanitizerException;
40  import fr.paris.lutece.portal.service.html.XSSSanitizerService;
41  import fr.paris.lutece.portal.service.util.AppLogService;
42  
43  public class XSSRequestWrapper extends HttpServletRequestWrapper
44  {
45  
46      public XSSRequestWrapper( HttpServletRequest request )
47      {
48  	super ( request);
49      }
50  
51      @Override
52      public String getParameter( String name )
53      {
54  	try
55  	{
56  		if ( super.getParameter( name ) == null )
57  		{
58  			return null;
59  		}
60  
61  	    return XSSSanitizerService.sanitize ( super.getParameter( name ) );
62  	} 
63  	catch ( XSSSanitizerException e )
64  	{
65  	    AppLogService.error ( "XSS Sanitizer error", e );
66  	    return null;
67  	}
68      }
69  
70      @Override
71      public String[ ] getParameterValues( String name )
72      {
73  	String[ ] values = super.getParameterValues ( name );
74  	if ( values == null )
75  	{
76  	    return null;
77  	}
78  	for ( int i = 0; i < values.length; i++ )
79  	{
80  	    try
81  	    {
82  	    	if ( values[ i ] != null )
83  	    	{
84  	    		values[ i ] = XSSSanitizerService.sanitize ( ( values[ i ] ) );	
85  	    	}
86  	    } 
87  	    catch ( XSSSanitizerException e )
88  	    {
89  		AppLogService.error ( "XSS Sanitizer error", e );
90  		values[ i ] = null;
91  	    }
92  	}
93  	return values;
94      }
95  }