1 // Copyright 2020 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "util/crypto/random_bytes.h"
6
7 #include <algorithm>
8 #include <utility>
9
10 #include "gtest/gtest.h"
11
12 namespace openscreen {
13 namespace {
14
15 struct NonZero {
16 NonZero() = default;
operator ()openscreen::__anon46f9b8ff0111::NonZero17 bool operator()(int n) const { return n > 0; }
18 };
19
20 } // namespace
21
TEST(RandomBytesTest,CanGenerateRandomBytes)22 TEST(RandomBytesTest, CanGenerateRandomBytes) {
23 std::array<uint8_t, 4> bytes;
24 GenerateRandomBytes(bytes.begin(), bytes.size());
25
26 NonZero pred;
27 ASSERT_TRUE(std::any_of(bytes.begin(), bytes.end(), pred));
28 }
29
TEST(RandomBytesTest,CanGenerate16RandomBytes)30 TEST(RandomBytesTest, CanGenerate16RandomBytes) {
31 std::array<uint8_t, 16> bytes = GenerateRandomBytes16();
32
33 NonZero pred;
34 ASSERT_TRUE(std::any_of(bytes.begin(), bytes.end(), pred));
35 }
36
TEST(RandomBytesTest,KeysAreNotIdentical)37 TEST(RandomBytesTest, KeysAreNotIdentical) {
38 constexpr int kNumKeys = 100;
39 constexpr int kKeyLength = 100;
40 std::array<std::array<uint8_t, kKeyLength>, kNumKeys> keys;
41 for (int i = 0; i < kNumKeys; ++i) {
42 GenerateRandomBytes(keys[i].begin(), kKeyLength);
43 }
44
45 std::sort(std::begin(keys), std::end(keys));
46 ASSERT_TRUE(std::adjacent_find(std::begin(keys), std::end(keys)) ==
47 std::end(keys));
48 }
49
50 } // namespace openscreen
51