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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "crypto/random.h"
#include <stddef.h>
#include <string>
#include "testing/gtest/include/gtest/gtest.h"
// Basic functionality tests. Does NOT test the security of the random data.
// 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(base::span<const uint8_t> bytes) {
for (size_t i = 0u; i < bytes.size(); i++) {
if (bytes[i] != bytes[0]) {
return false;
}
}
return true;
}
TEST(RandBytes, RandBytes) {
std::array<uint8_t, 16> bytes;
crypto::RandBytes(bytes);
EXPECT_FALSE(IsTrivial(bytes));
}
TEST(RandBytes, RandBytesAsVector) {
std::vector<uint8_t> vector = crypto::RandBytesAsVector(16);
EXPECT_FALSE(IsTrivial(vector));
}