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#include "ping_array.h"
#include <gtest/gtest.h>
#include <memory>
#include "crypto_core_test_util.hh"
#include "mem_test_util.hh"
#include "mono_time.h"
namespace {
struct Ping_Array_Deleter {
void operator()(Ping_Array *arr) { ping_array_kill(arr); }
};
using Ping_Array_Ptr = std::unique_ptr<Ping_Array, Ping_Array_Deleter>;
struct Mono_Time_Deleter {
Mono_Time_Deleter(const Test_Memory &mem)
: mem_(mem)
{
}
void operator()(Mono_Time *arr) { mono_time_free(mem_, arr); }
private:
const Test_Memory &mem_;
};
using Mono_Time_Ptr = std::unique_ptr<Mono_Time, Mono_Time_Deleter>;
TEST(PingArray, MinimumTimeoutIsOne)
{
Test_Memory mem;
EXPECT_EQ(ping_array_new(mem, 1, 0), nullptr);
EXPECT_NE(Ping_Array_Ptr(ping_array_new(mem, 1, 1)), nullptr);
}
TEST(PingArray, MinimumArraySizeIsOne)
{
Test_Memory mem;
EXPECT_EQ(ping_array_new(mem, 0, 1), nullptr);
EXPECT_NE(Ping_Array_Ptr(ping_array_new(mem, 1, 1)), nullptr);
}
TEST(PingArray, ArraySizeMustBePowerOfTwo)
{
Test_Memory mem;
Ping_Array_Ptr arr;
arr.reset(ping_array_new(mem, 2, 1));
EXPECT_NE(arr, nullptr);
arr.reset(ping_array_new(mem, 4, 1));
EXPECT_NE(arr, nullptr);
arr.reset(ping_array_new(mem, 1024, 1));
EXPECT_NE(arr, nullptr);
EXPECT_EQ(ping_array_new(mem, 1023, 1), nullptr);
EXPECT_EQ(ping_array_new(mem, 1234, 1), nullptr);
}
TEST(PingArray, StoredDataCanBeRetrieved)
{
Test_Memory mem;
Test_Random rng;
Ping_Array_Ptr const arr(ping_array_new(mem, 2, 1));
Mono_Time_Ptr const mono_time(mono_time_new(mem, nullptr, nullptr), mem);
ASSERT_NE(mono_time, nullptr);
uint64_t const ping_id = ping_array_add(
arr.get(), mono_time.get(), rng, std::vector<uint8_t>{1, 2, 3, 4}.data(), 4);
EXPECT_NE(ping_id, 0);
std::vector<uint8_t> data(4);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), data.data(), data.size(), ping_id), 4);
EXPECT_EQ(data, std::vector<uint8_t>({1, 2, 3, 4}));
}
TEST(PingArray, RetrievingDataWithTooSmallOutputBufferHasNoEffect)
{
Test_Memory mem;
Test_Random rng;
Ping_Array_Ptr const arr(ping_array_new(mem, 2, 1));
Mono_Time_Ptr const mono_time(mono_time_new(mem, nullptr, nullptr), mem);
ASSERT_NE(mono_time, nullptr);
uint64_t const ping_id = ping_array_add(
arr.get(), mono_time.get(), rng, (std::vector<uint8_t>{1, 2, 3, 4}).data(), 4);
EXPECT_NE(ping_id, 0);
std::vector<uint8_t> data(4);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), data.data(), 3, ping_id), -1);
// It doesn't write anything to the data array.
EXPECT_EQ(data, std::vector<uint8_t>({0, 0, 0, 0}));
// Afterwards, we can still read it.
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), data.data(), 4, ping_id), 4);
EXPECT_EQ(data, std::vector<uint8_t>({1, 2, 3, 4}));
}
TEST(PingArray, ZeroLengthDataCanBeAdded)
{
Test_Memory mem;
Test_Random rng;
Ping_Array_Ptr const arr(ping_array_new(mem, 2, 1));
Mono_Time_Ptr const mono_time(mono_time_new(mem, nullptr, nullptr), mem);
ASSERT_NE(mono_time, nullptr);
uint8_t c = 0;
uint64_t const ping_id = ping_array_add(arr.get(), mono_time.get(), rng, &c, sizeof(c));
EXPECT_NE(ping_id, 0);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), &c, sizeof(c), ping_id), 1);
}
TEST(PingArray, PingId0IsInvalid)
{
Test_Memory mem;
Ping_Array_Ptr const arr(ping_array_new(mem, 2, 1));
Mono_Time_Ptr const mono_time(mono_time_new(mem, nullptr, nullptr), mem);
ASSERT_NE(mono_time, nullptr);
uint8_t c = 0;
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), &c, sizeof(c), 0), -1);
}
// Protection against replay attacks.
TEST(PingArray, DataCanOnlyBeRetrievedOnce)
{
Test_Memory mem;
Test_Random rng;
Ping_Array_Ptr const arr(ping_array_new(mem, 2, 1));
Mono_Time_Ptr const mono_time(mono_time_new(mem, nullptr, nullptr), mem);
ASSERT_NE(mono_time, nullptr);
uint8_t c = 0;
uint64_t const ping_id = ping_array_add(arr.get(), mono_time.get(), rng, &c, sizeof(c));
EXPECT_NE(ping_id, 0);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), &c, sizeof(c), ping_id), 1);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), &c, sizeof(c), ping_id), -1);
}
TEST(PingArray, PingIdMustMatchOnCheck)
{
Test_Memory mem;
Test_Random rng;
Ping_Array_Ptr const arr(ping_array_new(mem, 1, 1));
Mono_Time_Ptr const mono_time(mono_time_new(mem, nullptr, nullptr), mem);
ASSERT_NE(mono_time, nullptr);
uint8_t c = 0;
uint64_t const ping_id = ping_array_add(arr.get(), mono_time.get(), rng, &c, sizeof(c));
EXPECT_NE(ping_id, 0);
uint64_t const bad_ping_id = ping_id == 1 ? 2 : 1;
// bad_ping_id will also be pointing at the same element, but won't match the
// actual ping_id.
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), &c, sizeof(c), bad_ping_id), -1);
EXPECT_EQ(ping_array_check(arr.get(), mono_time.get(), &c, sizeof(c), ping_id), 1);
}
} // namespace
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