Use aslr patch

src/client/main.cpp

@@ -39,6 +39,47 @@ launcher::mode detect_mode_from_arguments()
 	return launcher::mode::none;
 }
 
+void apply_aslr_patch(std::string* data)
+{
+	// sp binary
+	if (data->size() != 0xE1E0C8)
+	{
+		throw std::runtime_error("File size mismatch, bad game files");
+	}
+
+	auto* dos_header = reinterpret_cast<PIMAGE_DOS_HEADER>(&data->at(0));
+	auto* nt_headers = reinterpret_cast<PIMAGE_NT_HEADERS>(&data->at(dos_header->e_lfanew));
+	auto* optional_header = &nt_headers->OptionalHeader;
+
+	if (optional_header->DllCharacteristics & IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE)
+	{
+		optional_header->DllCharacteristics &= ~(IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE);
+	}
+}
+
+void get_aslr_patched_binary(std::string* binary, std::string* data)
+{
+	const auto patched_binary = "h2_sp_patched.exe"s;
+
+	try
+	{
+		apply_aslr_patch(data);
+		if (!utils::io::file_exists(patched_binary) && !utils::io::write_file(patched_binary, *data, false))
+		{
+			throw std::runtime_error("Could not write file");
+		}
+	}
+	catch (const std::exception& e)
+	{
+		throw std::runtime_error(
+			utils::string::va("Could not create aslr patched binary for %s! %s",
+			binary->data(), e.what())
+		);
+	}
+
+	*binary = patched_binary;
+}
+
 FARPROC load_binary(const launcher::mode mode)
 {
 	loader loader;
@@ -62,21 +103,10 @@ FARPROC load_binary(const launcher::mode mode)
 		return component_loader::load_import(library, function);
 	});
 
-	std::string binary;
-	switch (mode)
+	std::string binary = "MW2CR.exe";
+	if (!utils::io::file_exists(binary))
 	{
-	case launcher::mode::singleplayer:
-		binary = "MW2CR.exe";
-
-		if (!utils::io::file_exists(binary))
-		{
-			binary = "h2_sp64_bnet_ship.exe";
-		}
-
-		break;
-	case launcher::mode::none:
-	default:
-		throw std::runtime_error("Invalid game mode!");
+		binary = "h2_sp64_bnet_ship.exe";
 	}
 
 	std::string data;
@@ -87,9 +117,13 @@ FARPROC load_binary(const launcher::mode mode)
 			binary.data()));
 	}
 
+#ifdef INJECT_HOST_AS_LIB
+	get_aslr_patched_binary(&binary, &data);
+	return loader.load_library(binary);
+#else
 	return loader.load(self, data);
+#endif
 }
-
 void remove_crash_file()
 {
 	utils::io::remove_file("__h2Exe");

src/client/std_include.cpp

@@ -1,13 +1,30 @@
 #include <std_include.hpp>
 
+#pragma comment(linker, "/stack:0x1000000")
+
+#ifdef INJECT_HOST_AS_LIB
+#pragma comment(linker, "/base:0x160000000")
+#else
+#pragma comment(linker, "/base:0x140000000")
 #pragma comment(linker, "/merge:.data=.cld")
 #pragma comment(linker, "/merge:.rdata=.clr")
 #pragma comment(linker, "/merge:.cl=.main")
 #pragma comment(linker, "/merge:.text=.main")
-#pragma comment(linker, "/stack:0x1000000")
-#pragma comment(linker, "/base:0x140000000")
+#endif
+
+#pragma comment(linker, "/manifestdependency:\"type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='amd64' publicKeyToken='6595b64144ccf1df' language=''\"")
+
+#ifndef INJECT_HOST_AS_LIB
 #pragma bss_seg(".payload")
 char payload_data[BINARY_PAYLOAD_SIZE];
+extern "C"
+{
+	char* get_payload_data()
+	{
+		return &payload_data[0];
+	}
+}
+#endif
 
 extern "C"
 {
@@ -17,12 +34,6 @@ extern "C"
 
 extern "C"
 {
-	// workaround for release build removing 'payload_data'
-	char* dont_remove_this()
-	{
-		return payload_data;
-	}
-
 	int s_read_arc4random(void*, size_t)
 	{
 		return -1;

src/client/std_include.hpp

@@ -1,6 +1,7 @@
 #pragma once
 
 #define BINARY_PAYLOAD_SIZE 0x12000000
+#define INJECT_HOST_AS_LIB
 
 #pragma warning(push)
 #pragma warning(disable: 4100)