1 files changed, 110 insertions, 0 deletions
diff --git a/internal_rewrite/factory.cpp b/internal_rewrite/factory.cpp
new file mode 100644
index 0000000..0e7bc03
--- /dev/null
+++ b/internal_rewrite/factory.cpp
@@ -0,0 +1,110 @@
+#include "factory.hpp"
+#ifndef IFACE_DLLMAIN
+#include "fnv.hpp"
+
+#include <algorithm>
+
+NAMESPACE_REGION( factory )
+NAMESPACE_REGION( interfaces )
+
+//iterate all exports inside of a module and find createinterface
+uintptr_t c_interface_manager::find_createinterface( void* module_ ) {
+	IMAGE_DOS_HEADER*		dos_header;
+	IMAGE_NT_HEADERS*		nt_headers;
+	uintptr_t				export_address;
+	IMAGE_EXPORT_DIRECTORY*	export_dir;
+	const char*				export_name;
+	uintptr_t*				names;
+	uintptr_t*				funcs;
+	uint16_t*				ords;
+	uint32_t				export_hash;
+
+	dos_header = reinterpret_cast< decltype( dos_header ) >( uintptr_t( module_ ) );
+	nt_headers = reinterpret_cast< decltype( nt_headers ) >( uintptr_t( module_ ) + dos_header->e_lfanew );
+	
+	//find addresses of functions from nt headers
+	export_address = nt_headers->OptionalHeader.DataDirectory[ 0 ].VirtualAddress;
+	export_dir = reinterpret_cast< decltype( export_dir ) >( uintptr_t( module_ ) + export_address );
+
+	if ( !export_dir->NumberOfFunctions )
+		return uintptr_t{ };
+
+	names = reinterpret_cast< uintptr_t* >( uintptr_t( module_ ) + export_dir->AddressOfNames );
+	funcs = reinterpret_cast< uintptr_t* >( uintptr_t( module_ ) + export_dir->AddressOfFunctions );
+
+	ords = reinterpret_cast< uint16_t* >( uintptr_t( module_ ) + export_dir->AddressOfNameOrdinals );
+
+	if ( names && funcs && ords ) {
+		//iterate the exports
+		for ( size_t i{ }; i < export_dir->NumberOfNames; ++i ) {
+			export_name = reinterpret_cast< const char* >( uintptr_t( module_ ) + names[ i ] );
+			export_hash = hash::fnv1a( export_name );
+
+			if ( export_hash == fnv( "CreateInterface" ) ) {
+				return uintptr_t( module_ ) + funcs[ ords[ i ] ];
+			}
+		}
+	}
+
+	return uintptr_t{ };
+}
+
+c_interface_manager::c_interface_manager( ) {
+	auto teb = reinterpret_cast< PTEB >( __readfsdword( uintptr_t( &static_cast< NT_TIB* >( nullptr )->Self ) ) );
+	auto peb = teb->ProcessEnvironmentBlock;
+
+	auto root = &peb->Ldr->InMemoryOrderModuleList;
+	//iterate module list
+	for ( auto entry = root->Flink->Flink->Flink->Flink; entry != root; entry = entry->Flink ) {
+		PLDR_DATA_TABLE_ENTRY	data_table;
+		HMODULE					module_base;
+		uintptr_t				create_interface_export;
+		uintptr_t				create_interface_;
+		uintptr_t*				list_iterator_ptr;
+		interface_iterator_t*	list_iterator;
+
+		data_table = reinterpret_cast< PLDR_DATA_TABLE_ENTRY >( entry );
+		module_base = reinterpret_cast< HMODULE >( data_table->Reserved2[ 0 ] );
+		create_interface_export = find_createinterface( module_base );
+
+		if ( !create_interface_export || !is_createinterface_export( create_interface_export ) ) {
+			continue;
+		}
+
+		//find the createinterface function
+		create_interface_ = follow_createinterface_export( create_interface_export );
+		if ( !is_createinterface_fn( create_interface_ ) ) {
+			continue;
+		}
+
+		//find the list iterator
+		list_iterator_ptr = find_list_ptr( create_interface_ );
+
+		//iterate the interface list
+		for ( list_iterator = reinterpret_cast< interface_iterator_t* >(
+			list_iterator_ptr );
+			!!list_iterator;
+			list_iterator = list_iterator->m_next
+			) {
+			std::string name( list_iterator->m_name );
+			std::string module_name( util::unicode_to_ascii(
+				std::wstring( data_table->FullDllName.Buffer, data_table->FullDllName.Length ) ) );
+
+			uintptr_t ptr = static_cast< uintptr_t( *)( ) >( list_iterator->m_create_fn )( );
+
+			size_t version = [ & ]( ) {
+				std::string ret( name );
+				ret.erase( std::remove_if( ret.begin( ), ret.end( ),
+					[ & ]( int i ) { return !::isdigit( i ); }
+				), ret.end( ) );
+				return atoi( ret.c_str( ) );
+			}( );
+
+			m_interfaces.emplace_back( interface_data_t{ name, module_name, version, ptr } );
+		}
+	}
+}
+
+END_REGION
+END_REGION
+#endif
+\ No newline at end of file