Basic anticheat component
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60cd705153
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@ -33,6 +33,7 @@ namespace Components
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Loader::Register(new Renderer());
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Loader::Register(new UIFeeder());
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Loader::Register(new UIScript());
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Loader::Register(new AntiCheat());
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Loader::Register(new Dedicated());
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Loader::Register(new Discovery());
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Loader::Register(new Exception());
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@ -48,6 +48,7 @@ namespace Components
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#include "Modules\Renderer.hpp"
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#include "Modules\UIFeeder.hpp"
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#include "Modules\UIScript.hpp"
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#include "Modules\AntiCheat.hpp"
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#include "Modules\Dedicated.hpp"
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#include "Modules\Discovery.hpp"
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#include "Modules\Exception.hpp"
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src/Components/Modules/AntiCheat.cpp
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86
src/Components/Modules/AntiCheat.cpp
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@ -0,0 +1,86 @@
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#include "STDInclude.hpp"
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namespace Components
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{
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std::string AntiCheat::Hash;
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void __declspec(naked) AntiCheat::CrashClient()
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{
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static uint8_t crashProcedure[] =
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{
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// Uninstall minidump handler
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0xB8, 0x63, 0xE7, 0x2F, 0x00, // mov eax, 2FE763h
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0x05, 0xAD, 0xAD, 0x3C, 0x00, // add eax, 3CADADh
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0x6A, 0x58, // push 88
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0x8B, 0x80, 0xEA, 0x01, 0x00, 0x00, // mov eax, [eax + 1EAh]
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0xFF, 0x10, // call dword ptr [eax]
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// Crash me.
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0xB8, 0x4F, 0x91, 0x27, 0x00, // mov eax, 27914Fh
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0x05, 0xDD, 0x28, 0x1A, 0x00, // add eax, 1A28DDh
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0x80, 0x00, 0x68, // add byte ptr [eax], 68h
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0xC3, // retn
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};
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__asm
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{
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// This does absolutely nothing :P
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// TODO: Obfuscate even more
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xor eax, eax
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mov ebx, [esp + 4h]
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shl ebx, 4h
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// Call our crash procedure
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push offset crashProcedure
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retn
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}
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}
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// This has to be called when doing .text changes during runtime
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void AntiCheat::EmptyHash()
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{
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AntiCheat::Hash.clear();
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}
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void AntiCheat::Frame()
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{
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static int lastCheck = 0;
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// Perform check only every 20 seconds
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if (lastCheck && (Game::Com_Milliseconds() - lastCheck) < 1000 * 20) return;
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lastCheck = Game::Com_Milliseconds();
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// Get base module
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const uint8_t* module = reinterpret_cast<const uint8_t*>(GetModuleHandle(NULL));
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std::string hash = Utils::Cryptography::SHA512::Compute(module + 0x1000, 0x2D6000, false);
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// Set the hash, if none is set
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if (AntiCheat::Hash.empty())
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{
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AntiCheat::Hash = hash;
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}
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// Crash if the hashes don't match
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else if(AntiCheat::Hash != hash)
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{
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AntiCheat::CrashClient();
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}
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}
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AntiCheat::AntiCheat()
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{
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Renderer::OnFrame(AntiCheat::Frame);
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Dedicated::OnFrame(AntiCheat::Frame);
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#ifdef DEBUG
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Command::Add("penis", [] (Command::Params)
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{
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AntiCheat::CrashClient();
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});
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#endif
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}
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AntiCheat::~AntiCheat()
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{
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AntiCheat::EmptyHash();
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}
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}
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src/Components/Modules/AntiCheat.hpp
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src/Components/Modules/AntiCheat.hpp
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@ -0,0 +1,18 @@
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namespace Components
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{
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class AntiCheat : public Component
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{
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public:
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AntiCheat();
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~AntiCheat();
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const char* GetName() { return "Component"; }; // Wrong name :P
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static void CrashClient();
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static void EmptyHash();
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private:
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static std::string Hash;
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static void Frame();
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};
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}
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@ -120,12 +120,17 @@ namespace Utils
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#pragma region SHA256
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std::string SHA256::Compute(std::string data, bool hex)
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{
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return SHA256::Compute(reinterpret_cast<const uint8_t*>(data.data()), data.size(), hex);
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}
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std::string SHA256::Compute(const uint8_t* data, size_t length, bool hex)
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{
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uint8_t buffer[32] = { 0 };
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hash_state state;
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sha256_init(&state);
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sha256_process(&state, reinterpret_cast<const uint8_t*>(data.data()), data.size());
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sha256_process(&state, data, length);
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sha256_done(&state, buffer);
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std::string hash(reinterpret_cast<char*>(buffer), sizeof(buffer));
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@ -139,12 +144,17 @@ namespace Utils
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#pragma region SHA512
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std::string SHA512::Compute(std::string data, bool hex)
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{
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return SHA512::Compute(reinterpret_cast<const uint8_t*>(data.data()), data.size(), hex);
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}
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std::string SHA512::Compute(const uint8_t* data, size_t length, bool hex)
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{
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uint8_t buffer[64] = { 0 };
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hash_state state;
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sha512_init(&state);
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sha512_process(&state, reinterpret_cast<const uint8_t*>(data.data()), data.size());
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sha512_process(&state, data, length);
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sha512_done(&state, buffer);
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std::string hash(reinterpret_cast<char*>(buffer), sizeof(buffer));
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@ -226,12 +226,14 @@ namespace Utils
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{
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public:
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static std::string Compute(std::string data, bool hex = false);
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static std::string Compute(const uint8_t* data, size_t length, bool hex = false);
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};
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class SHA512
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{
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public:
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static std::string Compute(std::string data, bool hex = false);
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static std::string Compute(const uint8_t* data, size_t length, bool hex = false);
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};
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}
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}
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