51 lines
1.6 KiB
Java
51 lines
1.6 KiB
Java
/**
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*
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* Copyright 2003-2007 Jive Software, 2016-2019 Florian Schmaus.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.util;
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import java.security.SecureRandom;
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import java.util.Random;
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public class RandomUtil {
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static final ThreadLocal<SecureRandom> SECURE_RANDOM = new ThreadLocal<SecureRandom>() {
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@Override
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protected SecureRandom initialValue() {
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return new SecureRandom();
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}
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};
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/**
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* Pseudo-random number generator object for use with randomString().
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* The Random class is not considered to be cryptographically secure, so
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* only use these random Strings for low to medium security applications.
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*/
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static final ThreadLocal<Random> RANDOM = new ThreadLocal<Random>() {
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@Override
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protected Random initialValue() {
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return new Random();
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}
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};
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public static int nextSecureRandomInt(int bound) {
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return SECURE_RANDOM.get().nextInt(bound);
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}
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public static int nextSecureRandomInt() {
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return SECURE_RANDOM.get().nextInt();
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}
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}
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