mirror of
https://github.com/kidfromjupiter/nearby.git
synced 2026-09-15 07:06:11 -04:00
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
// Copyright 2020 Google LLC
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// https://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#include "internal/crypto/random.h"
|
|
|
|
#include <stddef.h>
|
|
|
|
#include <string>
|
|
|
|
#include "gtest/gtest.h"
|
|
#include "internal/crypto/nearby_base.h"
|
|
|
|
// Basic functionality tests. Does NOT test the security of the random data.
|
|
|
|
namespace crypto {
|
|
namespace {
|
|
|
|
// Ensures we don't have all trivial data, i.e. that the data is indeed random.
|
|
// Currently, that means the bytes cannot be all the same (e.g. all zeros).
|
|
bool IsTrivial(const std::string& bytes) {
|
|
for (size_t i = 0; i < bytes.size(); i++) {
|
|
if (bytes[i] != bytes[0]) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
TEST(RandBytes, RandBytes) {
|
|
std::string bytes(16, '\0');
|
|
RandBytes(nearbybase::WriteInto(&bytes, bytes.size()), bytes.size());
|
|
EXPECT_TRUE(!IsTrivial(bytes));
|
|
}
|
|
|
|
TEST(RandBytes, RandomString) {
|
|
constexpr size_t kSize = 30;
|
|
|
|
std::string bytes = RandBytes(kSize);
|
|
|
|
EXPECT_EQ(bytes.size(), kSize);
|
|
EXPECT_TRUE(!IsTrivial(bytes));
|
|
}
|
|
|
|
TEST(RandBytes, RandData) {
|
|
uint64_t x = RandData<uint64_t>();
|
|
uint64_t y = RandData<uint64_t>();
|
|
|
|
// Once in a billion years, consecutively generated random numbers will be
|
|
// the same and the test will fail.
|
|
EXPECT_NE(x, y);
|
|
EXPECT_NE(x >> 32, x & 0xFFFFFFFF);
|
|
}
|
|
|
|
} // namespace
|
|
} // namespace crypto
|