1 /* 2 * Copyright 2020 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <openssl/rand.h> 20 21 #include <array> 22 23 namespace bluetooth { 24 namespace os { 25 26 template <size_t SIZE> GenerateRandom()27std::array<uint8_t, SIZE> GenerateRandom() { 28 std::array<uint8_t, SIZE> ret; 29 ASSERT(RAND_bytes(ret.data(), ret.size()) == 1); 30 return ret; 31 } 32 GenerateRandom()33inline uint32_t GenerateRandom() { 34 uint32_t ret{}; 35 ASSERT(RAND_bytes((uint8_t*)(&ret), sizeof(uint32_t)) == 1); 36 return ret; 37 } 38 39 } // namespace os 40 } // namespace bluetooth