Java tutorial
//package com.java2s; /* * Copyright (C) 2016 JRummy Apps Inc. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * Raw */ import java.security.SecureRandom; public class Main { private static SecureRandom secureRandom; /** * Generates a random token. * * @return A nonce, with a length of 32, to be used with the {@link SafetyNet} request. */ public static byte[] generateOneTimeNonce() { if (secureRandom == null) { secureRandom = new SecureRandom(); } byte[] nonce = new byte[32]; secureRandom.nextBytes(nonce); return nonce; } }