/*
    * Copyright 2014 The Netty Project
    *
    * The Netty Project licenses this file to you 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:
    *
    *   https://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.
   */
  package io.netty5.handler.ssl.util;
  
  import java.security.SecureRandom;
  import java.util.Random;
  import java.util.concurrent.ThreadLocalRandom;
  
  /**
   * Insecure {@link SecureRandom} which relies on {@link ThreadLocalRandom#current()} for random number
   * generation.
   */
  final class ThreadLocalInsecureRandom extends SecureRandom {
  
      private static final long serialVersionUID = -8209473337192526191L;
  
      private static final SecureRandom INSTANCE = new ThreadLocalInsecureRandom();
  
      static SecureRandom current() {
          return INSTANCE;
      }
  
      private ThreadLocalInsecureRandom() { }
  
      @Override
      public String getAlgorithm() {
          return "insecure";
      }
  
      @Override
      public void setSeed(byte[] seed) { }
  
      @Override
      public void setSeed(long seed) { }
  
      @Override
      public void nextBytes(byte[] bytes) {
          random().nextBytes(bytes);
      }
  
      @Override
      public byte[] generateSeed(int numBytes) {
          byte[] seed = new byte[numBytes];
          random().nextBytes(seed);
          return seed;
      }
  
      @Override
      public int nextInt() {
          return random().nextInt();
      }
  
      @Override
      public int nextInt(int n) {
          return random().nextInt(n);
      }
  
      @Override
      public boolean nextBoolean() {
          return random().nextBoolean();
      }
  
      @Override
      public long nextLong() {
          return random().nextLong();
      }
  
      @Override
      public float nextFloat() {
          return random().nextFloat();
      }
  
      @Override
      public double nextDouble() {
          return random().nextDouble();
      }
  
      @Override
      public double nextGaussian() {
          return random().nextGaussian();
      }
  
      private static Random random() {
          return ThreadLocalRandom.current();
      }
  }