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https://github.com/DarkflameUniverse/DarkflameServer.git
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e8479cd6e5
The key came from the shared game random engine, which is seeded from the start time. It now comes from std::random_device through a small helper. The key stays a 32 bit number, so the packets do not change. The master and world servers no longer write the key or its hash to the log. Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
36 lines
1021 B
C++
36 lines
1021 B
C++
#include <gtest/gtest.h>
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#include <random>
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#include <set>
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#include "Game.h"
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#include "GeneralUtils.h"
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TEST(GeneralUtilsTest, UnpredictableNumberLeavesTheGameEngineAlone) {
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Game::randomEngine = std::mt19937(1234);
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std::mt19937 expected(1234);
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GeneralUtils::GenerateUnpredictableNumber<uint32_t>();
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GeneralUtils::GenerateUnpredictableNumber<uint64_t>();
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EXPECT_EQ(Game::randomEngine(), expected());
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}
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TEST(GeneralUtilsTest, UnpredictableNumberDoesNotFollowTheGameEngineSeed) {
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std::set<uint64_t> seen;
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for (uint32_t i = 0; i < 16; i++) {
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// The same seed every time would give the same number every time from the game engine
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Game::randomEngine = std::mt19937(1234);
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seen.insert(GeneralUtils::GenerateUnpredictableNumber<uint64_t>());
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}
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EXPECT_EQ(seen.size(), 16);
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}
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TEST(GeneralUtilsTest, UnpredictableNumberFillsEveryByte) {
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uint64_t seenBits = 0;
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for (uint32_t i = 0; i < 64; i++) seenBits |= GeneralUtils::GenerateUnpredictableNumber<uint64_t>();
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EXPECT_EQ(seenBits, 0xFFFFFFFFFFFFFFFFULL);
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}
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