1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License ,
7 Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS ,
16 WITHOUT WARRANTIES OR CONDITIONS OF ANY
17 * KIND ,
18 either express or implied. See the License for the
19 * specific language governing permissions and limitations
20 * under the License.
21 */
22
23 package org.apache.myfaces.tobago.internal.util;
24
25 import java.security.SecureRandom;
26 import java.util.Base64;
27
28 /**
29 * Helps to get a random string.
30 */
31 public class RandomUtils {
32
33 private static final SecureRandom RANDOM = new SecureRandom();
34
35 private static final int SECRET_LENGTH = 16;
36
37 private static String encodeBase64(final byte[] bytes) {
38 return Base64.getEncoder().encodeToString(bytes);
39 }
40
41 public static String nextString() {
42 final byte[] bytes = new byte[SECRET_LENGTH];
43 RANDOM.nextBytes(bytes);
44 return encodeBase64(bytes);
45 }
46
47 }