| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "sandbox/win/src/process_mitigations_win32k_interception.h" |
| |
| #include <algorithm> |
| |
| #include "base/numerics/safe_conversions.h" |
| #include "base/numerics/safe_math.h" |
| #include "base/win/scoped_handle.h" |
| #include "sandbox/win/src/crosscall_client.h" |
| #include "sandbox/win/src/ipc_tags.h" |
| #include "sandbox/win/src/policy_params.h" |
| #include "sandbox/win/src/policy_target.h" |
| #include "sandbox/win/src/sandbox_factory.h" |
| #include "sandbox/win/src/sandbox_nt_util.h" |
| #include "sandbox/win/src/sharedmem_ipc_client.h" |
| #include "sandbox/win/src/target_services.h" |
| |
| namespace sandbox { |
| |
| namespace { |
| |
| // Implement a simple shared memory class as we can't use the base one. |
| class ScopedSharedMemory { |
| public: |
| ScopedSharedMemory(uint32_t size) : memory_(nullptr) { |
| handle_.Set(::CreateFileMapping(INVALID_HANDLE_VALUE, nullptr, |
| PAGE_READWRITE | SEC_COMMIT, 0, size, |
| nullptr)); |
| if (handle_.IsValid()) { |
| memory_ = ::MapViewOfFile(handle_.Get(), FILE_MAP_READ | FILE_MAP_WRITE, |
| 0, 0, size); |
| } |
| } |
| ~ScopedSharedMemory() { |
| if (memory_) |
| ::UnmapViewOfFile(memory_); |
| } |
| |
| void* handle() { return handle_.Get(); } |
| void* memory() { return memory_; } |
| bool IsValid() { return handle_.IsValid() && memory_; } |
| |
| private: |
| base::win::ScopedHandle handle_; |
| void* memory_; |
| }; |
| |
| void UnicodeStringToString(PUNICODE_STRING unicode_string, |
| base::string16* result) { |
| *result = base::string16( |
| unicode_string->Buffer, |
| unicode_string->Buffer + |
| (unicode_string->Length / sizeof(unicode_string->Buffer[0]))); |
| } |
| |
| bool CallMonitorInfo(HMONITOR monitor, MONITORINFOEXW* monitor_info_ptr) { |
| // We don't trust that the IPC can work this early. |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return false; |
| |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return false; |
| |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| InOutCountedBuffer buffer(monitor_info_ptr, sizeof(*monitor_info_ptr)); |
| ResultCode code = CrossCall(ipc, IPC_USER_GETMONITORINFO_TAG, |
| static_cast<void*>(monitor), buffer, &answer); |
| |
| if (code != SBOX_ALL_OK) |
| return false; |
| |
| if (answer.win32_result != ERROR_SUCCESS) |
| return false; |
| |
| return true; |
| } |
| |
| } // namespace |
| |
| BOOL WINAPI |
| TargetGdiDllInitialize(GdiDllInitializeFunction orig_gdi_dll_initialize, |
| HANDLE dll, |
| DWORD reason) { |
| return true; |
| } |
| |
| HGDIOBJ WINAPI |
| TargetGetStockObject(GetStockObjectFunction orig_get_stock_object, int object) { |
| return nullptr; |
| } |
| |
| ATOM WINAPI |
| TargetRegisterClassW(RegisterClassWFunction orig_register_class_function, |
| const WNDCLASS* wnd_class) { |
| return true; |
| } |
| |
| BOOL WINAPI TargetEnumDisplayMonitors(EnumDisplayMonitorsFunction, |
| HDC hdc, |
| LPCRECT lprcClip, |
| MONITORENUMPROC lpfnEnum, |
| LPARAM dwData) { |
| if (!lpfnEnum || hdc || lprcClip) { |
| return false; |
| } |
| |
| // We don't trust that the IPC can work this early. |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return false; |
| |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return false; |
| |
| CrossCallReturn answer = {0}; |
| answer.nt_status = 0; |
| EnumMonitorsResult result = {}; |
| InOutCountedBuffer result_buffer(&result, sizeof(result)); |
| SharedMemIPCClient ipc(ipc_memory); |
| ResultCode code = |
| CrossCall(ipc, IPC_USER_ENUMDISPLAYMONITORS_TAG, result_buffer, &answer); |
| |
| if (code != SBOX_ALL_OK) |
| return false; |
| |
| if (answer.win32_result) |
| return false; |
| |
| if (result.monitor_count > kMaxEnumMonitors) |
| return false; |
| |
| for (uint32_t monitor_pos = 0; monitor_pos < result.monitor_count; |
| ++monitor_pos) { |
| bool continue_enum = |
| lpfnEnum(result.monitors[monitor_pos], nullptr, nullptr, dwData); |
| if (!continue_enum) |
| return false; |
| } |
| |
| return true; |
| } |
| |
| BOOL WINAPI TargetEnumDisplayDevicesA(EnumDisplayDevicesAFunction, |
| LPCSTR lpDevice, |
| DWORD iDevNum, |
| PDISPLAY_DEVICEA lpDisplayDevice, |
| DWORD dwFlags) { |
| return false; |
| } |
| |
| BOOL WINAPI TargetGetMonitorInfoA(GetMonitorInfoAFunction, |
| HMONITOR monitor, |
| MONITORINFO* monitor_info_ptr) { |
| if (!monitor_info_ptr) |
| return false; |
| DWORD size = monitor_info_ptr->cbSize; |
| if (size != sizeof(MONITORINFO) && size != sizeof(MONITORINFOEXA)) |
| return false; |
| MONITORINFOEXW monitor_info_tmp = {}; |
| monitor_info_tmp.cbSize = sizeof(monitor_info_tmp); |
| bool success = CallMonitorInfo(monitor, &monitor_info_tmp); |
| if (!success) |
| return false; |
| memcpy(monitor_info_ptr, &monitor_info_tmp, sizeof(*monitor_info_ptr)); |
| if (size == sizeof(MONITORINFOEXA)) { |
| MONITORINFOEXA* monitor_info_exa = |
| reinterpret_cast<MONITORINFOEXA*>(monitor_info_ptr); |
| if (!::WideCharToMultiByte(CP_ACP, 0, monitor_info_tmp.szDevice, -1, |
| monitor_info_exa->szDevice, |
| sizeof(monitor_info_exa->szDevice), nullptr, |
| nullptr)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| BOOL WINAPI TargetGetMonitorInfoW(GetMonitorInfoWFunction, |
| HMONITOR monitor, |
| LPMONITORINFO monitor_info_ptr) { |
| if (!monitor_info_ptr) |
| return false; |
| DWORD size = monitor_info_ptr->cbSize; |
| if (size != sizeof(MONITORINFO) && size != sizeof(MONITORINFOEXW)) |
| return false; |
| MONITORINFOEXW monitor_info_tmp = {}; |
| monitor_info_tmp.cbSize = sizeof(monitor_info_tmp); |
| if (!CallMonitorInfo(monitor, &monitor_info_tmp)) |
| return false; |
| memcpy(monitor_info_ptr, &monitor_info_tmp, size); |
| return true; |
| } |
| |
| static NTSTATUS GetCertificateCommon( |
| PUNICODE_STRING device_name, |
| OPM_PROTECTED_OUTPUT_HANDLE protected_output, |
| DXGKMDT_CERTIFICATE_TYPE certificate_type, |
| BYTE* certificate, |
| ULONG certificate_size) { |
| // Don't support arbitrarily large certificate buffers. |
| if (certificate_size > kProtectedVideoOutputSectionSize) |
| return STATUS_INVALID_PARAMETER; |
| if (certificate_type != DXGKMDT_OPM_CERTIFICATE) |
| return STATUS_INVALID_PARAMETER; |
| if (device_name && device_name->Length == 0) |
| return STATUS_INVALID_PARAMETER; |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return STATUS_ACCESS_DENIED; |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return STATUS_ACCESS_DENIED; |
| |
| ScopedSharedMemory buffer(certificate_size); |
| if (!buffer.IsValid()) |
| return STATUS_INVALID_PARAMETER; |
| base::string16 device_name_str; |
| void* protected_output_handle = nullptr; |
| if (device_name) { |
| if (device_name->Length == 0) |
| return STATUS_INVALID_PARAMETER; |
| UnicodeStringToString(device_name, &device_name_str); |
| } else { |
| protected_output_handle = protected_output; |
| } |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| ResultCode code = |
| CrossCall(ipc, IPC_GDI_GETCERTIFICATE_TAG, device_name_str.c_str(), |
| protected_output_handle, buffer.handle(), |
| static_cast<uint32_t>(certificate_size), &answer); |
| |
| if (code != SBOX_ALL_OK) { |
| return STATUS_ACCESS_DENIED; |
| } |
| |
| if (!answer.nt_status) |
| memcpy(certificate, buffer.memory(), certificate_size); |
| |
| return answer.nt_status; |
| } |
| |
| NTSTATUS WINAPI TargetGetCertificate(GetCertificateFunction, |
| PUNICODE_STRING device_name, |
| DXGKMDT_CERTIFICATE_TYPE certificate_type, |
| BYTE* certificate, |
| ULONG certificate_size) { |
| return GetCertificateCommon(device_name, nullptr, certificate_type, |
| certificate, certificate_size); |
| } |
| |
| static NTSTATUS GetCertificateSizeCommon( |
| PUNICODE_STRING device_name, |
| OPM_PROTECTED_OUTPUT_HANDLE protected_output, |
| DXGKMDT_CERTIFICATE_TYPE certificate_type, |
| ULONG* certificate_length) { |
| if (certificate_type != DXGKMDT_OPM_CERTIFICATE) |
| return STATUS_INVALID_PARAMETER; |
| if (device_name && device_name->Length == 0) |
| return STATUS_INVALID_PARAMETER; |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return STATUS_ACCESS_DENIED; |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return STATUS_ACCESS_DENIED; |
| |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| base::string16 device_name_str; |
| void* protected_output_handle = nullptr; |
| if (device_name) { |
| UnicodeStringToString(device_name, &device_name_str); |
| } else { |
| protected_output_handle = protected_output; |
| } |
| ResultCode code = |
| CrossCall(ipc, IPC_GDI_GETCERTIFICATESIZE_TAG, device_name_str.c_str(), |
| protected_output_handle, &answer); |
| |
| if (code != SBOX_ALL_OK) { |
| return STATUS_ACCESS_DENIED; |
| } |
| |
| if (!answer.nt_status) |
| *certificate_length = answer.extended[0].unsigned_int; |
| |
| return answer.nt_status; |
| } |
| |
| NTSTATUS WINAPI |
| TargetGetCertificateSize(GetCertificateSizeFunction, |
| PUNICODE_STRING device_name, |
| DXGKMDT_CERTIFICATE_TYPE certificate_type, |
| ULONG* certificate_length) { |
| return GetCertificateSizeCommon(device_name, nullptr, certificate_type, |
| certificate_length); |
| } |
| |
| SANDBOX_INTERCEPT NTSTATUS WINAPI TargetGetCertificateByHandle( |
| GetCertificateByHandleFunction orig_get_certificate_function, |
| OPM_PROTECTED_OUTPUT_HANDLE protected_output, |
| DXGKMDT_CERTIFICATE_TYPE certificate_type, |
| BYTE* certificate, |
| ULONG certificate_length) { |
| return GetCertificateCommon(nullptr, protected_output, certificate_type, |
| certificate, certificate_length); |
| } |
| |
| SANDBOX_INTERCEPT NTSTATUS WINAPI TargetGetCertificateSizeByHandle( |
| GetCertificateSizeByHandleFunction orig_get_certificate_size_function, |
| OPM_PROTECTED_OUTPUT_HANDLE protected_output, |
| DXGKMDT_CERTIFICATE_TYPE certificate_type, |
| ULONG* certificate_length) { |
| return GetCertificateSizeCommon(nullptr, protected_output, certificate_type, |
| certificate_length); |
| } |
| |
| NTSTATUS WINAPI |
| TargetDestroyOPMProtectedOutput(DestroyOPMProtectedOutputFunction, |
| OPM_PROTECTED_OUTPUT_HANDLE protected_output) { |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return STATUS_ACCESS_DENIED; |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return STATUS_ACCESS_DENIED; |
| |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| ResultCode code = CrossCall(ipc, IPC_GDI_DESTROYOPMPROTECTEDOUTPUT_TAG, |
| static_cast<void*>(protected_output), &answer); |
| |
| if (code != SBOX_ALL_OK) |
| return STATUS_ACCESS_DENIED; |
| |
| return answer.nt_status; |
| } |
| |
| NTSTATUS WINAPI TargetConfigureOPMProtectedOutput( |
| ConfigureOPMProtectedOutputFunction, |
| OPM_PROTECTED_OUTPUT_HANDLE protected_output, |
| const DXGKMDT_OPM_CONFIGURE_PARAMETERS* parameters, |
| ULONG additional_parameters_size, |
| const BYTE* additional_parameters) { |
| // Don't support additional parameters. |
| if (additional_parameters_size > 0) |
| return STATUS_INVALID_PARAMETER; |
| |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return STATUS_ACCESS_DENIED; |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return STATUS_ACCESS_DENIED; |
| |
| ScopedSharedMemory buffer(sizeof(*parameters)); |
| if (!buffer.IsValid()) |
| return STATUS_INVALID_PARAMETER; |
| memcpy(buffer.memory(), parameters, sizeof(*parameters)); |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| ResultCode code = |
| CrossCall(ipc, IPC_GDI_CONFIGUREOPMPROTECTEDOUTPUT_TAG, |
| static_cast<void*>(protected_output), buffer.handle(), &answer); |
| |
| if (code != SBOX_ALL_OK) { |
| return STATUS_ACCESS_DENIED; |
| } |
| |
| return answer.nt_status; |
| } |
| |
| NTSTATUS WINAPI TargetGetOPMInformation( |
| GetOPMInformationFunction, |
| OPM_PROTECTED_OUTPUT_HANDLE protected_output, |
| const DXGKMDT_OPM_GET_INFO_PARAMETERS* parameters, |
| DXGKMDT_OPM_REQUESTED_INFORMATION* requested_information) { |
| size_t max_size = |
| std::max(sizeof(*parameters), sizeof(*requested_information)); |
| |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return STATUS_ACCESS_DENIED; |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return STATUS_ACCESS_DENIED; |
| |
| ScopedSharedMemory buffer(base::checked_cast<uint32_t>(max_size)); |
| if (!buffer.IsValid()) |
| return STATUS_INVALID_PARAMETER; |
| memcpy(buffer.memory(), parameters, sizeof(*parameters)); |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| ResultCode code = |
| CrossCall(ipc, IPC_GDI_GETOPMINFORMATION_TAG, |
| static_cast<void*>(protected_output), buffer.handle(), &answer); |
| |
| if (code != SBOX_ALL_OK) |
| return STATUS_ACCESS_DENIED; |
| |
| if (!answer.nt_status) { |
| memcpy(requested_information, buffer.memory(), |
| sizeof(*requested_information)); |
| } |
| |
| return answer.nt_status; |
| } |
| |
| NTSTATUS WINAPI |
| TargetGetOPMRandomNumber(GetOPMRandomNumberFunction, |
| OPM_PROTECTED_OUTPUT_HANDLE protected_output, |
| DXGKMDT_OPM_RANDOM_NUMBER* random_number) { |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return STATUS_ACCESS_DENIED; |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return STATUS_ACCESS_DENIED; |
| |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| InOutCountedBuffer buffer(random_number, sizeof(*random_number)); |
| ResultCode code = |
| CrossCall(ipc, IPC_GDI_GETOPMRANDOMNUMBER_TAG, |
| static_cast<void*>(protected_output), buffer, &answer); |
| |
| if (code != SBOX_ALL_OK) |
| return STATUS_ACCESS_DENIED; |
| |
| return answer.nt_status; |
| } |
| |
| NTSTATUS WINAPI TargetGetSuggestedOPMProtectedOutputArraySize( |
| GetSuggestedOPMProtectedOutputArraySizeFunction, |
| PUNICODE_STRING device_name, |
| DWORD* suggested_output_size) { |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return STATUS_ACCESS_DENIED; |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return STATUS_ACCESS_DENIED; |
| |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| base::string16 device_name_str; |
| UnicodeStringToString(device_name, &device_name_str); |
| ResultCode code = |
| CrossCall(ipc, IPC_GDI_GETSUGGESTEDOPMPROTECTEDOUTPUTARRAYSIZE_TAG, |
| device_name_str.c_str(), &answer); |
| |
| if (code != SBOX_ALL_OK) |
| return STATUS_ACCESS_DENIED; |
| |
| if (!answer.nt_status) |
| *suggested_output_size = answer.extended[0].unsigned_int; |
| |
| return answer.nt_status; |
| } |
| |
| NTSTATUS WINAPI TargetSetOPMSigningKeyAndSequenceNumbers( |
| SetOPMSigningKeyAndSequenceNumbersFunction, |
| OPM_PROTECTED_OUTPUT_HANDLE protected_output, |
| const DXGKMDT_OPM_ENCRYPTED_PARAMETERS* parameters) { |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return STATUS_ACCESS_DENIED; |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return STATUS_ACCESS_DENIED; |
| |
| DXGKMDT_OPM_ENCRYPTED_PARAMETERS temp_parameters = *parameters; |
| |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| InOutCountedBuffer buffer(&temp_parameters, sizeof(temp_parameters)); |
| ResultCode code = |
| CrossCall(ipc, IPC_GDI_SETOPMSIGNINGKEYANDSEQUENCENUMBERS_TAG, |
| static_cast<void*>(protected_output), buffer, &answer); |
| |
| if (code != SBOX_ALL_OK) |
| return STATUS_ACCESS_DENIED; |
| |
| return answer.nt_status; |
| } |
| |
| NTSTATUS WINAPI |
| TargetCreateOPMProtectedOutputs(CreateOPMProtectedOutputsFunction, |
| PUNICODE_STRING device_name, |
| DXGKMDT_OPM_VIDEO_OUTPUT_SEMANTICS vos, |
| DWORD outputs_array_size, |
| DWORD* output_size, |
| OPM_PROTECTED_OUTPUT_HANDLE* outputs_array) { |
| if (vos != DXGKMDT_OPM_VOS_OPM_SEMANTICS) |
| return STATUS_INVALID_PARAMETER; |
| |
| if (!SandboxFactory::GetTargetServices()->GetState()->InitCalled()) |
| return STATUS_ACCESS_DENIED; |
| void* ipc_memory = GetGlobalIPCMemory(); |
| if (!ipc_memory) |
| return STATUS_ACCESS_DENIED; |
| |
| CrossCallReturn answer = {}; |
| SharedMemIPCClient ipc(ipc_memory); |
| base::CheckedNumeric<uint32_t> array_size = outputs_array_size; |
| array_size *= sizeof(HANDLE); |
| if (!array_size.IsValid()) |
| return STATUS_INVALID_PARAMETER; |
| |
| InOutCountedBuffer buffer(outputs_array, array_size.ValueOrDie()); |
| base::string16 device_name_str; |
| UnicodeStringToString(device_name, &device_name_str); |
| ResultCode code = CrossCall(ipc, IPC_GDI_CREATEOPMPROTECTEDOUTPUTS_TAG, |
| device_name_str.c_str(), buffer, &answer); |
| |
| if (code != SBOX_ALL_OK) |
| return STATUS_ACCESS_DENIED; |
| |
| if (!answer.nt_status) |
| *output_size = answer.extended[0].unsigned_int; |
| |
| return answer.nt_status; |
| } |
| |
| } // namespace sandbox |
