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#pragma once
// IWYU pragma: private, include "rlbox.hpp"
// IWYU pragma: friend "rlbox_.*\.hpp"
#include <cstring>
#include <functional>
#include <type_traits>
#include "rlbox_conversion.hpp"
#include "rlbox_helpers.hpp"
#include "rlbox_types.hpp"
#include "rlbox_wrapper_traits.hpp"
namespace rlbox::detail {
template<typename T, typename T_Sbx, typename T_Enable = void>
struct convert_to_sandbox_equivalent_helper;
template<typename T, typename T_Sbx>
struct convert_to_sandbox_equivalent_helper<
T,
T_Sbx,
std::enable_if_t<!std::is_class_v<T>>>
{
using type = typename rlbox_sandbox<
T_Sbx>::template convert_to_sandbox_equivalent_nonclass_t<T>;
};
template<typename T, typename T_Sbx>
using convert_to_sandbox_equivalent_t =
typename convert_to_sandbox_equivalent_helper<T, T_Sbx>::type;
// This is used by rlbox_load_structs_from_library to test the current namespace
struct markerStruct
{};
}
#define helper_create_converted_field(fieldType, fieldName, isFrozen) \
typename detail::convert_to_sandbox_equivalent_t<fieldType, T_Sbx> fieldName;
#define helper_no_op()
#define sandbox_equivalent_specialization(T, libId) \
template<typename T_Sbx> \
struct Sbx_##libId##_##T \
{ \
sandbox_fields_reflection_##libId##_class_##T( \
helper_create_converted_field, \
helper_no_op) \
}; \
\
/* add convert_to_sandbox_equivalent_t specialization for new struct */ \
namespace detail { \
template<typename T_Template, typename T_Sbx> \
struct convert_to_sandbox_equivalent_helper< \
T_Template, \
T_Sbx, \
std::enable_if_t<std::is_same_v<T_Template, T>>> \
{ \
using type = Sbx_##libId##_##T<T_Sbx>; \
}; \
}
#define helper_create_tainted_field( \
fieldType, fieldName, isFrozen, MaybeConst) \
MaybeConst tainted<fieldType, T_Sbx> fieldName;
#define helper_create_tainted_vol_field( \
fieldType, fieldName, isFrozen, MaybeConst) \
MaybeConst tainted_volatile<fieldType, T_Sbx> fieldName;
#define helper_convert_type(fieldType, fieldName, isFrozen) \
::rlbox::detail::convert_type<T_Sbx, Direction, Context>( \
lhs.fieldName, rhs.fieldName, example_unsandboxed_ptr, sandbox_ptr);
#define helper_find_example_pointer_or_null(fieldType, fieldName, isFrozen) \
{ \
const void* ret = fieldName.find_example_pointer_or_null(); \
if (ret != nullptr) { \
return ret; \
} \
}
#define tainted_data_specialization_helper(MaybeConst, T, libId) \
\
template<typename T_Sbx> \
class tainted_volatile<MaybeConst T, T_Sbx> \
{ \
KEEP_CLASSES_FRIENDLY \
KEEP_CAST_FRIENDLY \
\
private: \
inline MaybeConst Sbx_##libId##_##T<T_Sbx>& \
get_sandbox_value_ref() noexcept \
{ \
return *reinterpret_cast<MaybeConst Sbx_##libId##_##T<T_Sbx>*>(this); \
} \
\
inline const Sbx_##libId##_##T<T_Sbx>& get_sandbox_value_ref() \
const noexcept \
{ \
return *reinterpret_cast<const Sbx_##libId##_##T<T_Sbx>*>(this); \
} \
\
inline T get_raw_value() const noexcept \
{ \
T lhs; \
const auto& rhs = get_sandbox_value_ref(); \
constexpr auto Direction = \
detail::adjust_type_direction::TO_APPLICATION; \
constexpr auto Context = detail::adjust_type_context::EXAMPLE; \
/* This is a tainted_volatile, so its address is a valid example for use \
* as example_unsandboxed_ptr */ \
const void* example_unsandboxed_ptr = &rhs; \
rlbox_sandbox<T_Sbx>* sandbox_ptr = nullptr; \
sandbox_fields_reflection_##libId##_class_##T(helper_convert_type, \
helper_no_op) \
\
return lhs; \
} \
\
/* get_raw_sandbox_value has to return a custom struct to deal with the \
* adjusted machine model, to ensure */ \
inline Sbx_##libId##_##T<T_Sbx> get_raw_sandbox_value() const noexcept \
{ \
auto ret_ptr = reinterpret_cast<const Sbx_##libId##_##T<T_Sbx>*>(this); \
return *ret_ptr; \
} \
\
tainted_volatile() = default; \
tainted_volatile(const tainted_volatile<MaybeConst T, T_Sbx>& p) = \
default; \
\
public: \
sandbox_fields_reflection_##libId##_class_##T( \
helper_create_tainted_vol_field, \
helper_no_op, \
MaybeConst) \
\
inline tainted<MaybeConst T*, T_Sbx> \
operator&() const noexcept \
{ \
auto ref_cast = \
reinterpret_cast<MaybeConst T*>(&get_sandbox_value_ref()); \
auto ret = tainted<MaybeConst T*, T_Sbx>::internal_factory(ref_cast); \
return ret; \
} \
\
inline auto UNSAFE_unverified() const { return get_raw_value(); } \
inline auto UNSAFE_sandboxed(rlbox_sandbox<T_Sbx>& sandbox) const \
{ \
return get_raw_sandbox_value(sandbox); \
} \
\
template<size_t N> \
inline auto unverified_safe_because(const char (&reason)[N]) const \
{ \
RLBOX_UNUSED(reason); \
return UNSAFE_unverified(); \
} \
\
T copy_and_verify(std::function<T(tainted<T, T_Sbx>)> verifier) \
{ \
tainted<T, T_Sbx> val(*this); \
return verifier(val); \
} \
\
/* Can't define this yet due, to mutually dependent definition between \
tainted and tainted_volatile for structs */ \
inline tainted_volatile<MaybeConst T, T_Sbx>& operator=( \
const tainted<T, T_Sbx>& rhs); \
}; \
\
template<typename T_Sbx> \
class tainted<MaybeConst T, T_Sbx> \
{ \
KEEP_CLASSES_FRIENDLY \
KEEP_CAST_FRIENDLY \
\
private: \
inline MaybeConst T& get_raw_value_ref() noexcept \
{ \
return *reinterpret_cast<MaybeConst T*>(this); \
} \
\
inline const T& get_raw_value_ref() const noexcept \
{ \
return *reinterpret_cast<const T*>(this); \
} \
\
inline T get_raw_value() const noexcept \
{ \
auto ret_ptr = reinterpret_cast<const T*>(this); \
return *ret_ptr; \
} \
\
/* get_raw_sandbox_value has to return a custom struct to deal with the \
* adjusted machine model, to ensure */ \
inline Sbx_##libId##_##T<T_Sbx> get_raw_sandbox_value( \
rlbox_sandbox<T_Sbx>& sandbox) const noexcept \
{ \
Sbx_##libId##_##T<T_Sbx> lhs; \
const auto& rhs = get_raw_value_ref(); \
constexpr auto Direction = detail::adjust_type_direction::TO_SANDBOX; \
constexpr auto Context = detail::adjust_type_context::SANDBOX; \
const void* example_unsandboxed_ptr = nullptr; \
rlbox_sandbox<T_Sbx>* sandbox_ptr = &sandbox; \
sandbox_fields_reflection_##libId##_class_##T(helper_convert_type, \
helper_no_op) \
\
return lhs; \
} \
\
inline const void* find_example_pointer_or_null() const noexcept \
{ \
sandbox_fields_reflection_##libId##_class_##T( \
helper_find_example_pointer_or_null, helper_no_op) \
\
return nullptr; \
} \
\
public: \
sandbox_fields_reflection_##libId##_class_##T(helper_create_tainted_field, \
helper_no_op, \
MaybeConst) \
\
tainted() = default; \
tainted(const tainted<MaybeConst T, T_Sbx>& p) = default; \
\
tainted(const tainted_volatile<T, T_Sbx>& p) \
{ \
auto& lhs = get_raw_value_ref(); \
auto& rhs = p.get_sandbox_value_ref(); \
constexpr auto Direction = \
detail::adjust_type_direction::TO_APPLICATION; \
constexpr auto Context = detail::adjust_type_context::EXAMPLE; \
/* This is a tainted_volatile, so its address is a valid for use as */ \
/* example_unsandboxed_ptr */ \
const void* example_unsandboxed_ptr = &rhs; \
rlbox_sandbox<T_Sbx>* sandbox_ptr = nullptr; \
sandbox_fields_reflection_##libId##_class_##T(helper_convert_type, \
helper_no_op) \
} \
\
inline tainted_opaque<MaybeConst T, T_Sbx> to_opaque() \
{ \
return *reinterpret_cast<tainted_opaque<MaybeConst T, T_Sbx>*>(this); \
} \
\
inline auto UNSAFE_unverified() const { return get_raw_value(); } \
inline auto UNSAFE_sandboxed(rlbox_sandbox<T_Sbx>& sandbox) const \
{ \
return get_raw_sandbox_value(sandbox); \
} \
\
template<size_t N> \
inline auto unverified_safe_because(const char (&reason)[N]) const \
{ \
RLBOX_UNUSED(reason); \
return UNSAFE_unverified(); \
} \
\
T copy_and_verify(std::function<T(tainted<T, T_Sbx>)> verifier) \
{ \
return verifier(*this); \
} \
}; \
\
/* Had to delay the definition due, to mutually dependence between \
tainted and tainted_volatile for structs */ \
template<typename T_Sbx> \
inline tainted_volatile<MaybeConst T, T_Sbx>& \
tainted_volatile<MaybeConst T, T_Sbx>::operator=( \
const tainted<T, T_Sbx>& rhs_wrap) \
{ \
auto& lhs = get_sandbox_value_ref(); \
auto& rhs = rhs_wrap.get_raw_value_ref(); \
constexpr auto Direction = detail::adjust_type_direction::TO_SANDBOX; \
constexpr auto Context = detail::adjust_type_context::EXAMPLE; \
/* This is a tainted_volatile, so its address is a valid example for */ \
/* use as example_unsandboxed_ptr */ \
const void* example_unsandboxed_ptr = &lhs; \
rlbox_sandbox<T_Sbx>* sandbox_ptr = nullptr; \
sandbox_fields_reflection_##libId##_class_##T(helper_convert_type, \
helper_no_op) \
\
return *this; \
}
#define tainted_data_specialization(T, libId) \
tainted_data_specialization_helper(, T, libId) \
tainted_data_specialization_helper(const, T, libId)
#define convert_type_specialization(T, libId) \
namespace detail { \
template<typename T_Sbx, \
detail::adjust_type_direction Direction, \
adjust_type_context Context, \
typename T_From> \
class convert_type_class<T_Sbx, Direction, Context, T, T_From> \
{ \
public: \
static inline void run(T& lhs, \
const T_From& rhs, \
const void* example_unsandboxed_ptr, \
rlbox_sandbox<T_Sbx>* sandbox_ptr) \
{ \
sandbox_fields_reflection_##libId##_class_##T(helper_convert_type, \
helper_no_op) \
} \
}; \
\
template<typename T_Sbx, \
detail::adjust_type_direction Direction, \
adjust_type_context Context, \
typename T_From> \
class convert_type_class<T_Sbx, \
Direction, \
Context, \
Sbx_##libId##_##T<T_Sbx>, \
T_From> \
{ \
public: \
static inline void run(Sbx_##libId##_##T<T_Sbx>& lhs, \
const T_From& rhs, \
const void* example_unsandboxed_ptr, \
rlbox_sandbox<T_Sbx>* sandbox_ptr) \
{ \
sandbox_fields_reflection_##libId##_class_##T(helper_convert_type, \
helper_no_op) \
} \
}; \
}
// clang-format off
#define rlbox_load_structs_from_library(libId) \
namespace rlbox { \
/* check that this macro is called in a global namespace */ \
static_assert( \
::rlbox::detail::is_member_of_rlbox_detail<detail::markerStruct>, \
"Invoke rlbox_load_structs_from_library in the global namespace"); \
\
sandbox_fields_reflection_##libId##_allClasses( \
sandbox_equivalent_specialization) \
\
sandbox_fields_reflection_##libId##_allClasses( \
tainted_data_specialization) \
\
sandbox_fields_reflection_##libId##_allClasses( \
convert_type_specialization) \
} \
RLBOX_REQUIRE_SEMI_COLON
// clang-format on
|
