Rim/iw4x-client
Rim/iw4x-client
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[Main] Hash .rdata segment to ensure no data manipulation was done

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This commit is contained in:
momo5502 2018-11-26 10:41:15 +01:00
parent 077d798e6b
commit 1adf34bbcd
1 changed files with 7 additions and 6 deletions
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13
src/Main.cpp
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@ -55,13 +55,14 @@ BOOL APIENTRY DllMain(HMODULE /*hModule*/, DWORD ul_reason_for_call, LPVOID /*l
Steam::Proxy::RunMod();
// Ensure we're working with our desired binary
char* textSegment = reinterpret_cast<char*>(0x401000);
auto hash = Utils::Cryptography::JenkinsOneAtATime::Compute(textSegment, 0x2D531F);
if (hash != 0x54684DBE
char* module = reinterpret_cast<char*>(0x400000);
auto hash1 = Utils::Cryptography::JenkinsOneAtATime::Compute(module + 0x1000, 0x2D531F); // .text
auto hash2 = Utils::Cryptography::JenkinsOneAtATime::Compute(module + 0x2D75FC, 0xBDA04); // .rdata
if ((hash1 != 0x54684DBE
#ifdef DEBUG
&& hash != 0x8AADE716
&& hash1 != 0x8AADE716
#endif
)
) || hash2 != 0x8030ec53)
{
return FALSE;
}
@ -78,7 +79,7 @@ BOOL APIENTRY DllMain(HMODULE /*hModule*/, DWORD ul_reason_for_call, LPVOID /*l
#endif
DWORD oldProtect;
VirtualProtect(textSegment, 0x2D6000, PAGE_EXECUTE_READ, &oldProtect); // Protect the .text segment
VirtualProtect(module + 0x1000, 0x2D6000, PAGE_EXECUTE_READ, &oldProtect); // Protect the .text segment
// Install entry point hook
Utils::Hook(0x6BAC0F, Main::EntryPoint, HOOK_JUMP).install()->quick();