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1   /*
2    * Licensed to the Apache Software Foundation (ASF) under one or more
3    * contributor license agreements.  See the NOTICE file distributed with
4    * this work for additional information regarding copyright ownership.
5    * The ASF licenses this file to You under the Apache License, Version 2.0
6    * (the "License"); you may not use this file except in compliance with
7    * the License.  You may obtain a copy of the License at
8    *
9    *  http://www.apache.org/licenses/LICENSE-2.0
10   *
11   * Unless required by applicable law or agreed to in writing, software
12   * distributed under the License is distributed on an "AS IS" BASIS,
13   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14   * See the License for the specific language governing permissions and
15   * limitations under the License.
16   */
17  
18  package org.apache.any23.util;
19  
20  import java.security.MessageDigest;
21  import java.security.NoSuchAlgorithmException;
22  
23  /**
24   * General utility functions.
25   *
26   * @author Michele Mostarda (mostarda@fbk.eu)
27   * @author Davide Palmisano (palmisano@fbk.eu)
28   */
29  public class MathUtils {
30  
31      private MathUtils(){}
32  
33      public static final String md5(String s) {
34          try {
35              MessageDigest md5 = MessageDigest.getInstance("MD5");
36              md5.reset();
37              md5.update(s.getBytes());
38              byte[] digest = md5.digest();
39              StringBuffer result = new StringBuffer();
40              for (byte b : digest) {
41                  result.append(Integer.toHexString(0xFF & b));
42              }
43              return result.toString();
44          } catch (NoSuchAlgorithmException e) {
45              throw new RuntimeException("Should never happen, MD5 is supported", e);
46          }
47      }
48  
49  }