1 /*
2 * Copyright (c) 2002-2021, 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.util.signrequest.security;
35
36 import java.io.UnsupportedEncodingException;
37 import java.security.MessageDigest;
38 import java.security.NoSuchAlgorithmException;
39
40 import org.apache.logging.log4j.LogManager;
41 import org.apache.logging.log4j.Logger;
42
43 /**
44 * Sha1HashService
45 */
46 public class Sha1HashService implements HashService
47 {
48 private static final String HEX_DIGITS = "0123456789abcdef";
49 private static Logger _logger = LogManager.getLogger( "lutece.security.signrequest" );
50
51 /**
52 * {@inheritDoc }
53 */
54 @Override
55 public String getHash( String strSource )
56 {
57 MessageDigest md1 = null;
58
59 try
60 {
61 md1 = MessageDigest.getInstance( "SHA-1" );
62 }
63 catch( NoSuchAlgorithmException e )
64 {
65 _logger.error( "Error creating hash " + e.getMessage( ), e );
66 }
67
68 try
69 {
70 md1.update( strSource.getBytes( "UTF-8" ) );
71 }
72 catch( UnsupportedEncodingException e )
73 {
74 _logger.error( "Error creating hash " + e.getMessage( ), e );
75 }
76
77 return hex( md1.digest( ) );
78 }
79
80 /**
81 * Convert bytes into an hexadecimal string
82 *
83 * @param bytes
84 * Array of bytes
85 * @return An Hexadecimal string
86 */
87 private static String hex( byte [ ] bytes )
88 {
89 StringBuilder sb = new StringBuilder( bytes.length * 2 );
90
91 for ( int i = 0; i < bytes.length; i++ )
92 {
93 int b = bytes [i] & 0xFF;
94 sb.append( HEX_DIGITS.charAt( b >>> 4 ) ).append( HEX_DIGITS.charAt( b & 0xF ) );
95 }
96
97 return sb.toString( );
98 }
99 }