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()27 std::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()33 inline 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