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 #include <stddef.h>
21
22 #include <array>
23 #include <cstdint>
24
25 namespace bluetooth {
26 namespace os {
27
28 template <size_t SIZE>
GenerateRandom()29 std::array<uint8_t, SIZE> GenerateRandom() {
30 std::array<uint8_t, SIZE> ret;
31 log::assert_that(RAND_bytes(ret.data(), ret.size()) == 1,
32 "assert failed: RAND_bytes(ret.data(), ret.size()) == 1");
33 return ret;
34 }
35
GenerateRandom()36 inline uint32_t GenerateRandom() {
37 uint32_t ret{};
38 log::assert_that(RAND_bytes((uint8_t*)(&ret), sizeof(uint32_t)) == 1,
39 "assert failed: RAND_bytes((uint8_t*)(&ret), sizeof(uint32_t)) == 1");
40 return ret;
41 }
42
GenerateRandomUint64()43 inline uint64_t GenerateRandomUint64() {
44 uint64_t ret{};
45 log::assert_that(RAND_bytes((uint8_t*)(&ret), sizeof(uint64_t)) == 1,
46 "assert failed: RAND_bytes((uint8_t*)(&ret), sizeof(uint64_t)) == 1");
47 return ret;
48 }
49
50 } // namespace os
51 } // namespace bluetooth
52