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.nio.charset.StandardCharsets;
21 import java.security.MessageDigest;
22 import java.security.NoSuchAlgorithmException;
23
24 /**
25 * General utility functions.
26 *
27 * @author Michele Mostarda (mostarda@fbk.eu)
28 * @author Davide Palmisano (palmisano@fbk.eu)
29 */
30 public class MathUtils {
31
32 private MathUtils() {
33 }
34
35 public static final String md5(String s) {
36 try {
37 MessageDigest md5 = MessageDigest.getInstance("MD5");
38 md5.reset();
39 md5.update(s.getBytes(StandardCharsets.UTF_8));
40 byte[] digest = md5.digest();
41 StringBuffer result = new StringBuffer();
42 for (byte b : digest) {
43 result.append(Integer.toHexString(0xFF & b));
44 }
45 return result.toString();
46 } catch (NoSuchAlgorithmException e) {
47 throw new RuntimeException("Should never happen, MD5 is supported", e);
48 }
49 }
50
51 }