1 // Copyright 2021 Code Intelligence GmbH 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package com.example; 16 17 import com.code_intelligence.jazzer.api.HookType; 18 import com.code_intelligence.jazzer.api.MethodHook; 19 import java.lang.invoke.MethodHandle; 20 21 public class ExampleFuzzerHooks { 22 @MethodHook(type = HookType.REPLACE, targetClassName = "java.security.SecureRandom", 23 targetMethod = "nextLong", targetMethodDescriptor = "()J") 24 public static long getRandomNumber(MethodHandle handle, Object thisObject, Object[] args, int hookId)25 getRandomNumber(MethodHandle handle, Object thisObject, Object[] args, int hookId) { 26 return 4; // chosen by fair dice roll. 27 // guaranteed to be random. 28 // https://xkcd.com/221/ 29 } 30 } 31