65 lines
1.7 KiB
C++
65 lines
1.7 KiB
C++
|
#include "test_util.hh"
|
||
|
|
|
||
|
|
#include <gmock/gmock.h>
|
||
|
|
#include <gtest/gtest.h>
|
||
|
|
|
||
|
|
#include <array>
|
||
|
|
|
||
|
|
#include "crypto_core_test_util.hh"
|
||
|
|
|
||
|
|
namespace {
|
||
|
|
|
||
|
|
using ::testing::Each;
|
||
|
|
using ::testing::Eq;
|
||
|
|
|
||
|
|
TEST(CryptoCoreTestUtil, RandomBytesDoesNotTouchZeroSizeArray)
|
||
|
|
{
|
||
|
|
const Test_Random rng;
|
||
|
|
std::array<uint8_t, 32> bytes{};
|
||
|
|
for (uint32_t i = 0; i < 100; ++i) {
|
||
|
|
random_bytes(rng, bytes.data(), 0);
|
||
|
|
ASSERT_THAT(bytes, Each(Eq(0x00)));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(CryptoCoreTestUtil, RandomBytesFillsEntireArray)
|
||
|
|
{
|
||
|
|
const Test_Random rng;
|
||
|
|
std::array<uint8_t, 32> bytes{};
|
||
|
|
|
||
|
|
for (uint32_t size = 1; size < bytes.size(); ++size) {
|
||
|
|
bool const success = [&]() {
|
||
|
|
// Try a few times. There ought to be a non-zero byte in our randomness at
|
||
|
|
// some point.
|
||
|
|
for (uint32_t i = 0; i < 100; ++i) {
|
||
|
|
random_bytes(rng, bytes.data(), bytes.size());
|
||
|
|
if (bytes[size - 1] != 0x00) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}();
|
||
|
|
ASSERT_TRUE(success);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
TEST(CryptoCoreTestUtil, RandomBytesDoesNotBufferOverrun)
|
||
|
|
{
|
||
|
|
const Test_Random rng;
|
||
|
|
|
||
|
|
std::array<uint8_t, 32> bytes{};
|
||
|
|
|
||
|
|
// Try a few times. It should never overrun.
|
||
|
|
for (uint32_t i = 0; i < 100; ++i) {
|
||
|
|
for (uint32_t diff = 1; diff < sizeof(uint64_t); ++diff) {
|
||
|
|
bytes = {};
|
||
|
|
random_bytes(rng, bytes.data(), bytes.size() - diff);
|
||
|
|
// All bytes not in the range we want to write should be 0.
|
||
|
|
ASSERT_THAT(std::vector<uint8_t>(bytes.begin() + (bytes.size() - diff), bytes.end()),
|
||
|
|
Each(Eq(0x00)));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace
|