mirror of https://github.com/Alia5/GlosSI
GlosSITarget: Refactor: Function unhooking
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/*
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Copyright 2021-2022 Peter Repukat - FlatspotSoftware
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "UnhookUtil.h"
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#include <spdlog/spdlog.h>
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#include "Settings.h"
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void UnhookUtil::UnPatchHook(const std::string& name, HMODULE module)
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{
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spdlog::trace("Patching \"{}\"...", name);
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BYTE* address = reinterpret_cast<BYTE*>(GetProcAddress(module, name.c_str()));
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if (!address) {
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spdlog::error("failed to unpatch \"{}\"", name);
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}
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std::string bytes;
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if (Settings::isWin10 && UNHOOK_BYTES_ORIGINAL_WIN10.contains(name)) {
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bytes = UNHOOK_BYTES_ORIGINAL_WIN10.at(name);
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}
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else {
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bytes = UNHOOK_BYTES_ORIGINAL_22000.at(name);
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}
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DWORD dw_old_protect, dw_bkup;
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const auto len = bytes.size();
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if (!VirtualProtect(address, len, PAGE_EXECUTE_READWRITE, &dw_old_protect)) { // Change permissions of memory..
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spdlog::error("Couldn't change permissions of memory for \"{}\"", name);
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return;
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}
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const auto opcode = *(address);
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if (!std::ranges::any_of(JUMP_INSTR_OPCODES, [&opcode](const auto& op) { return op == opcode; })) {
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spdlog::debug("\"{}\" Doesn't appear to be hooked, skipping!", name);
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}
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else {
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for (DWORD i = 0; i < len; i++) // unpatch Valve's hook
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{
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*(address + i) = bytes[i];
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}
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spdlog::trace("Unpatched \"{}\"", name);
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}
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VirtualProtect(address, len, dw_old_protect, &dw_bkup); // Revert permission change...
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}
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@ -0,0 +1,61 @@
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/*
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Copyright 2021-2022 Peter Repukat - FlatspotSoftware
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#pragma once
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#define NOMINMAX
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#include <map>
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#include <Windows.h>
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#include <string>
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#include <vector>
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namespace UnhookUtil {
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void UnPatchHook(const std::string& name, HMODULE module);
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static inline const std::vector<uint8_t> JUMP_INSTR_OPCODES = {
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0xE9,
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0xE8,
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0xEB,
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0xEA,
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0xFF};
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// Valve Hooks various functions and hides Gaming devices like this.
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// To be able to query them, unpatch the hook with the original bytes...
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// 22000 ^= Windows build number
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static inline const std::map<std::string, std::string> UNHOOK_BYTES_ORIGINAL_22000 = {
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{"SetupDiEnumDeviceInfo", "\x48\x89\x5C\x24\x08"},
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{"SetupDiGetClassDevsW", "\x48\x89\x5C\x24\x08"},
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{"HidD_GetPreparsedData", "\x48\x89\x5C\x24\x18"},
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{"HidP_GetCaps", "\x4C\x8B\xD1\x48\x85\xC9"},
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{"HidD_GetAttributes", "\x40\x53\x48\x83\xEC"},
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{"HidD_GetProductString", "\x48\x83\xEC\x48\x48"},
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{"HidP_GetUsages", "\x4C\x89\x4C\x24\x20"},
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{"HidP_GetData", "\x4C\x89\x44\x24\x18"},
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{"HidP_GetValueCaps", "\x48\x83\xEC\x48\x49"},
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{"HidP_GetUsageValue", "\x40\x53\x55\x56\x48"},
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{"HidP_GetButtonCaps", "\x48\x83\xEC\x48\x49"},
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// Valve hooks "CreateProcess" to detect child-processes
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{"CreateProcessW", "\x4C\x8B\xDC\x48\x83"},
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};
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// SetupApi.dll is different on Win10 than on Win11
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static inline const std::map<std::string, std::string> UNHOOK_BYTES_ORIGINAL_WIN10 = {
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{"SetupDiEnumDeviceInfo", "\x40\x53\x56\x57\x41\x54\x41\x55"},
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{"SetupDiGetClassDevsW", "\x48\x8B\xC4\x48\x89\x58\x08"},
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};
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} // namespace UnhookUtil
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