144 lines
3.8 KiB
C++
144 lines
3.8 KiB
C++
/**
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* This DLL hosts CLR4 environment from within a native binary. This way it is possible to
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* call .NET APIs from an unmanaged runtime.
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*
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* Mariusz B., mgeeky, 19'
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*
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**/
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#include <metahost.h>
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#include <stdio.h>
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#pragma comment(lib, "mscoree.lib")
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//////////////////////////////////////////////////
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//
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// Specify below .NET assembly, main class to instantiate and parameters to pass there.
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namespace CustomAssemblyParameters {
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LPCWSTR AssemblyName = L"%TEMP%\\ClmDisableAssembly.dll";
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LPCWSTR TypeName = L"ClmDisableAssembly.ClmDisableAssembly";
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LPCWSTR MethodName = L"Start";
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LPCWSTR Argument = L"(called from native CLR host)";
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}
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//////////////////////////////////////////////////
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#ifdef _DEBUG
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# define msg(x) MessageBoxW(nullptr, x, L"LoadCLRFromNativeDLL", 0)
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#else
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# define msg(x) ((void)0)
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#endif
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void DoProcessAttach()
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{
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ICLRMetaHost *metaHost = nullptr;
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ICLRRuntimeInfo *runtimeInfo = nullptr;
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ICLRRuntimeHost *runtimeHost = nullptr;
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IEnumUnknown *runtime = nullptr;
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IUnknown *enumRuntime = nullptr;
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LPWSTR frameworkName = nullptr;
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DWORD bytes = 2048;
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DWORD result = 0;
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if (CLRCreateInstance(
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CLSID_CLRMetaHost,
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IID_ICLRMetaHost,
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reinterpret_cast<LPVOID*>(&metaHost)
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) != S_OK) {
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msg(L"FAIL: Could not create MetaHost CLR instance.");
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return;
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}
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if (!metaHost || (metaHost->EnumerateInstalledRuntimes(
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&runtime
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) != S_OK)) {
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msg(L"FAIL: Cannot enumerate installed runtimes.");
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return;
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}
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if (!runtime) {
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msg(L"FAIL: Could not find installed runtimes.");
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return;
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}
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frameworkName = reinterpret_cast<LPWSTR>(LocalAlloc(
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LPTR,
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bytes
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));
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if (!frameworkName) {
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msg(L"FAIL: could not allocate 2048 bytes for framework name buffer.");
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return;
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}
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while (runtime->Next(1, &enumRuntime, 0) == S_OK) {
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if (enumRuntime && (enumRuntime->QueryInterface<ICLRRuntimeInfo>(&runtimeInfo) == S_OK)) {
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if (runtimeInfo != nullptr) {
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runtimeInfo->GetVersionString(frameworkName, &bytes);
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}
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}
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}
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if (runtimeInfo == nullptr || (runtimeInfo->GetInterface(
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CLSID_CLRRuntimeHost,
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IID_ICLRRuntimeHost,
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reinterpret_cast<LPVOID*>(&runtimeHost)
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) != S_OK)) {
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msg(L"FAIL: Could not get CLRRuntimeHost interface's reference.");
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return;
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}
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if (runtimeHost == nullptr) {
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msg(L"FAIL: Could not obtain reference to CLRRuntimeHost.");
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return;
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}
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runtimeHost->Start();
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WCHAR assemblyPath[1024] = L"";
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ExpandEnvironmentStringsW(CustomAssemblyParameters::AssemblyName, assemblyPath, _countof(assemblyPath));
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LPCWSTR assemblyPathPtr = assemblyPath;
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HRESULT hres = runtimeHost->ExecuteInDefaultAppDomain(
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assemblyPathPtr,
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CustomAssemblyParameters::TypeName,
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CustomAssemblyParameters::MethodName,
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CustomAssemblyParameters::Argument,
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&result
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);
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if (hres != S_OK) {
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wchar_t msgbuf[1024] = L"";
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swprintf_s(msgbuf, L"FAIL: Could not invoke custom .NET assembly, instantiate it's type or invoke a method. HRESULT = 0x%08x . Assembly path: '%s'", hres, assemblyPath);
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msg(msgbuf);
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}
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//runtimeHost->Stop();
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//runtimeHost->Release();
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runtimeInfo->Release();
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metaHost->Release();
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}
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BOOLEAN WINAPI DllMain(
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IN HINSTANCE /*hDllHandle*/,
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IN DWORD nReason,
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IN LPVOID /*Reserved*/
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)
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{
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switch (nReason)
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{
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case DLL_PROCESS_ATTACH:
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{
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DoProcessAttach();
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break;
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}
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case DLL_PROCESS_DETACH:
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case DLL_THREAD_ATTACH:
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case DLL_THREAD_DETACH:
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break;
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}
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return TRUE;
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}
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