crackme1

crackme.cpp

#include <Windows.h>
#include <strsafe.h>
#include <Shlobj.h>
#include <string.h>

//the exported function
typedef void(__cdecl* display_message)(void);
//this can change
#define DLL_NAME L"\\display.dll"

int main(int argc, char** argv){
	HINSTANCE hdll = NULL; 
	
	display_message display_func = NULL;
	PWSTR appdata_path = NULL;
	appdata_path = (PWSTR)malloc(MAX_PATH*2);
	memset(appdata_path, 0, MAX_PATH * 2);

	//get %appdata% roaming dir
	HRESULT ok = SHGetKnownFolderPath((REFKNOWNFOLDERID)FOLDERID_RoamingAppData, 0,
		NULL, &appdata_path);

	if (ok == S_OK){
		StringCchCat(appdata_path, MAX_PATH * 2, DLL_NAME);
		//wprintf(L"%ws\n", &appdata_path);
		hdll = LoadLibrary(appdata_path);
	}
	else{
		wprintf(L"dll path fail\n");
		return 0;
	}

	if (hdll != NULL){
		display_func = (display_message)GetProcAddress(hdll, "DisplayMessage");
		if (display_func != NULL){
			//call the function
			display_func();
			return 0;
		}
	}
	return 0;
}