[Windows Sandbox Tests] Process Mitigations.

sandbox/win/src/process_mitigations_unittest_win32k.cc

+// Copyright 2017 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.h"
+
+#include <d3d9.h>
+#include <initguid.h>
+#include <opmapi.h>
+#include <windows.h>
+
+#include "base/strings/stringprintf.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/win/windows_version.h"
+#include "sandbox/win/src/nt_internals.h"
+#include "sandbox/win/src/process_mitigations_win32k_policy.h"
+#include "sandbox/win/tests/common/controller.h"
+#include "sandbox/win/tests/integration_tests/integration_tests_common.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+
+//------------------------------------------------------------------------------
+// Internal Functions
+//------------------------------------------------------------------------------
+
+BOOL CALLBACK MonitorEnumCallback(HMONITOR monitor,
+                                  HDC hdc_monitor,
+                                  LPRECT rect_monitor,
+                                  LPARAM data) {
+  std::map<HMONITOR, base::string16>& monitors =
+      *reinterpret_cast<std::map<HMONITOR, base::string16>*>(data);
+  MONITORINFOEXW monitor_info = {};
+  monitor_info.cbSize = sizeof(monitor_info);
+
+  if (!::GetMonitorInfoW(monitor,
+                         reinterpret_cast<MONITORINFO*>(&monitor_info)))
+    return FALSE;
+  monitors[monitor] = monitor_info.szDevice;
+  return TRUE;
+}
+
+std::map<HMONITOR, std::wstring> EnumerateMonitors() {
+  std::map<HMONITOR, std::wstring> result;
+  ::EnumDisplayMonitors(nullptr, nullptr, MonitorEnumCallback,
+                        reinterpret_cast<LPARAM>(&result));
+  return result;
+}
+
+#define HMONITOR_ENTRY(monitor)                 \
+  result[reinterpret_cast<HMONITOR>(monitor)] = \
+      base::StringPrintf(L"\\\\.\\DISPLAY%X", monitor)
+
+std::map<HMONITOR, std::wstring> GetTestMonitors() {
+  std::map<HMONITOR, std::wstring> result;
+
+  HMONITOR_ENTRY(0x11111111);
+  HMONITOR_ENTRY(0x22222222);
+  HMONITOR_ENTRY(0x44444444);
+  HMONITOR_ENTRY(0x88888888);
+  return result;
+}
+
+std::wstring UnicodeStringToString(PUNICODE_STRING name) {
+  return std::wstring(name->Buffer,
+                      name->Buffer + (name->Length / sizeof(name->Buffer[0])));
+}
+
+// Returns an index 1, 2, 4 or 8 depening on the device. 0 on error.
+DWORD GetTestDeviceMonitorIndex(PUNICODE_STRING device_name) {
+  std::wstring name = UnicodeStringToString(device_name);
+  std::map<HMONITOR, std::wstring> monitors = GetTestMonitors();
+  for (const auto& monitor : monitors) {
+    if (name == monitor.second)
+      return static_cast<DWORD>(reinterpret_cast<uintptr_t>(monitor.first)) &
+             0xF;
+  }
+  return 0;
+}
+
+NTSTATUS WINAPI GetSuggestedOPMProtectedOutputArraySizeTest(
+    PUNICODE_STRING device_name,
+    DWORD* suggested_output_array_size) {
+  DWORD monitor = GetTestDeviceMonitorIndex(device_name);
+  if (!monitor)
+    return STATUS_OBJECT_NAME_NOT_FOUND;
+  *suggested_output_array_size = monitor;
+  return STATUS_SUCCESS;
+}
+
+NTSTATUS WINAPI
+CreateOPMProtectedOutputsTest(PUNICODE_STRING device_name,
+                              DXGKMDT_OPM_VIDEO_OUTPUT_SEMANTICS vos,
+                              DWORD output_array_size,
+                              DWORD* num_in_output_array,
+                              OPM_PROTECTED_OUTPUT_HANDLE* output_array) {
+  DWORD monitor = GetTestDeviceMonitorIndex(device_name);
+  if (!monitor)
+    return STATUS_OBJECT_NAME_NOT_FOUND;
+  if (vos != DXGKMDT_OPM_VOS_OPM_SEMANTICS)
+    return STATUS_INVALID_PARAMETER;
+  if (output_array_size != monitor)
+    return STATUS_INVALID_PARAMETER;
+  *num_in_output_array = monitor - 1;
+  for (DWORD index = 0; index < monitor - 1; ++index) {
+    output_array[index] =
+        reinterpret_cast<OPM_PROTECTED_OUTPUT_HANDLE>((monitor << 4) + index);
+  }
+  return STATUS_SUCCESS;
+}
+
+ULONG CalculateCertLength(ULONG monitor) {
+  return (monitor * 0x800) + 0xabc;
+}
+
+NTSTATUS WINAPI GetCertificateTest(PUNICODE_STRING device_name,
+                                   DXGKMDT_CERTIFICATE_TYPE certificate_type,
+                                   BYTE* certificate,
+                                   ULONG certificate_length) {
+  DWORD monitor = GetTestDeviceMonitorIndex(device_name);
+  if (!monitor)
+    return STATUS_OBJECT_NAME_NOT_FOUND;
+  if (certificate_type != DXGKMDT_OPM_CERTIFICATE)
+    return STATUS_INVALID_PARAMETER;
+  if (certificate_length != CalculateCertLength(monitor))
+    return STATUS_INVALID_PARAMETER;
+  memset(certificate, 'A' + monitor, certificate_length);
+  return STATUS_SUCCESS;
+}
+
+NTSTATUS WINAPI
+GetCertificateSizeTest(PUNICODE_STRING device_name,
+                       DXGKMDT_CERTIFICATE_TYPE certificate_type,
+                       ULONG* certificate_length) {
+  DWORD monitor = GetTestDeviceMonitorIndex(device_name);
+  if (!monitor)
+    return STATUS_OBJECT_NAME_NOT_FOUND;
+  if (certificate_type != DXGKMDT_OPM_CERTIFICATE)
+    return STATUS_INVALID_PARAMETER;
+  *certificate_length = CalculateCertLength(monitor);
+  return STATUS_SUCCESS;
+}
+
+// Check for valid output handle and return the monitor index.
+DWORD IsValidProtectedOutput(OPM_PROTECTED_OUTPUT_HANDLE protected_output) {
+  uintptr_t handle = reinterpret_cast<uintptr_t>(protected_output);
+  uintptr_t monitor = handle >> 4;
+  uintptr_t index = handle & 0xF;
+  switch (monitor) {
+    case 1:
+    case 2:
+    case 4:
+    case 8:
+      break;
+    default:
+      return 0;
+  }
+  if (index >= (monitor - 1))
+    return 0;
+  return static_cast<DWORD>(monitor);
+}
+
+NTSTATUS WINAPI
+GetCertificateByHandleTest(OPM_PROTECTED_OUTPUT_HANDLE protected_output,
+                           DXGKMDT_CERTIFICATE_TYPE certificate_type,
+                           BYTE* certificate,
+                           ULONG certificate_length) {
+  DWORD monitor = IsValidProtectedOutput(protected_output);
+  if (!monitor)
+    return STATUS_INVALID_HANDLE;
+  if (certificate_type != DXGKMDT_OPM_CERTIFICATE)
+    return STATUS_INVALID_PARAMETER;
+  if (certificate_length != CalculateCertLength(monitor))
+    return STATUS_INVALID_PARAMETER;
+  memset(certificate, 'A' + monitor, certificate_length);
+  return STATUS_SUCCESS;
+}
+
+NTSTATUS WINAPI
+GetCertificateSizeByHandleTest(OPM_PROTECTED_OUTPUT_HANDLE protected_output,
+                               DXGKMDT_CERTIFICATE_TYPE certificate_type,
+                               ULONG* certificate_length) {
+  DWORD monitor = IsValidProtectedOutput(protected_output);
+  if (!monitor)
+    return STATUS_INVALID_HANDLE;
+  if (certificate_type != DXGKMDT_OPM_CERTIFICATE)
+    return STATUS_INVALID_PARAMETER;
+  *certificate_length = CalculateCertLength(monitor);
+  return STATUS_SUCCESS;
+}
+
+NTSTATUS WINAPI
+DestroyOPMProtectedOutputTest(OPM_PROTECTED_OUTPUT_HANDLE protected_output) {
+  if (!IsValidProtectedOutput(protected_output))
+    return STATUS_INVALID_HANDLE;
+  return STATUS_SUCCESS;
+}
+
+NTSTATUS WINAPI ConfigureOPMProtectedOutputTest(
+    OPM_PROTECTED_OUTPUT_HANDLE protected_output,
+    const DXGKMDT_OPM_CONFIGURE_PARAMETERS* parameters,
+    ULONG additional_parameters_size,
+    const BYTE* additional_parameters) {
+  if (!IsValidProtectedOutput(protected_output))
+    return STATUS_INVALID_HANDLE;
+  if (additional_parameters && additional_parameters_size)
+    return STATUS_INVALID_PARAMETER;
+  return STATUS_SUCCESS;
+}
+
+NTSTATUS WINAPI GetOPMInformationTest(
+    OPM_PROTECTED_OUTPUT_HANDLE protected_output,
+    const DXGKMDT_OPM_GET_INFO_PARAMETERS* parameters,
+    DXGKMDT_OPM_REQUESTED_INFORMATION* requested_information) {
+  DWORD monitor = IsValidProtectedOutput(protected_output);
+  if (!monitor)
+    return STATUS_INVALID_HANDLE;
+  memset(requested_information, '0' + monitor,
+         sizeof(DXGKMDT_OPM_REQUESTED_INFORMATION));
+  return STATUS_SUCCESS;
+}
+
+NTSTATUS WINAPI
+GetOPMRandomNumberTest(OPM_PROTECTED_OUTPUT_HANDLE protected_output,
+                       DXGKMDT_OPM_RANDOM_NUMBER* random_number) {
+  DWORD monitor = IsValidProtectedOutput(protected_output);
+  if (!monitor)
+    return STATUS_INVALID_HANDLE;
+  memset(random_number->abRandomNumber, '!' + monitor,
+         sizeof(random_number->abRandomNumber));
+  return STATUS_SUCCESS;
+}
+
+NTSTATUS WINAPI SetOPMSigningKeyAndSequenceNumbersTest(
+    OPM_PROTECTED_OUTPUT_HANDLE protected_output,
+    const DXGKMDT_OPM_ENCRYPTED_PARAMETERS* parameters) {
+  DWORD monitor = IsValidProtectedOutput(protected_output);
+  if (!monitor)
+    return STATUS_INVALID_HANDLE;
+  DXGKMDT_OPM_ENCRYPTED_PARAMETERS test_params = {};
+  memset(test_params.abEncryptedParameters, 'a' + monitor,
+         sizeof(test_params.abEncryptedParameters));
+  if (memcmp(test_params.abEncryptedParameters,
+             parameters->abEncryptedParameters,
+             sizeof(test_params.abEncryptedParameters)) != 0)
+    return STATUS_INVALID_PARAMETER;
+  return STATUS_SUCCESS;
+}
+
+BOOL WINAPI EnumDisplayMonitorsTest(HDC hdc,
+                                    LPCRECT clip_rect,
+                                    MONITORENUMPROC enum_function,
+                                    LPARAM data) {
+  RECT rc = {};
+  for (const auto& monitor : GetTestMonitors()) {
+    if (!enum_function(monitor.first, hdc, &rc, data))
+      return FALSE;
+  }
+  return TRUE;
+}
+
+BOOL WINAPI GetMonitorInfoWTest(HMONITOR monitor, LPMONITORINFO monitor_info) {
+  std::map<HMONITOR, std::wstring> monitors = GetTestMonitors();
+  if (monitor_info->cbSize != sizeof(MONITORINFO) &&
+      monitor_info->cbSize != sizeof(MONITORINFOEXW))
+    return FALSE;
+  auto it = monitors.find(monitor);
+  if (it == monitors.end())
+    return FALSE;
+  if (monitor_info->cbSize == sizeof(MONITORINFOEXW)) {
+    MONITORINFOEXW* monitor_info_ex =
+        reinterpret_cast<MONITORINFOEXW*>(monitor_info);
+    size_t copy_size = (it->second.size() + 1) * sizeof(WCHAR);
+    if (copy_size > sizeof(monitor_info_ex->szDevice) - sizeof(WCHAR))
+      copy_size = sizeof(monitor_info_ex->szDevice) - sizeof(WCHAR);
+    memset(monitor_info_ex->szDevice, 0, sizeof(monitor_info_ex->szDevice));
+    memcpy(monitor_info_ex->szDevice, it->second.c_str(), copy_size);
+  }
+  return TRUE;
+}
+
+#define RETURN_TEST_FUNC(n)    \
+  if (strcmp(name, #n) == 0) { \
+    return n##Test;            \
+  }
+
+void* FunctionOverrideForTest(const char* name) {
+  RETURN_TEST_FUNC(GetSuggestedOPMProtectedOutputArraySize);
+  RETURN_TEST_FUNC(CreateOPMProtectedOutputs);
+  RETURN_TEST_FUNC(GetCertificate);
+  RETURN_TEST_FUNC(GetCertificateSize);
+  RETURN_TEST_FUNC(DestroyOPMProtectedOutput);
+  RETURN_TEST_FUNC(ConfigureOPMProtectedOutput);
+  RETURN_TEST_FUNC(GetOPMInformation);
+  RETURN_TEST_FUNC(GetOPMRandomNumber);
+  RETURN_TEST_FUNC(SetOPMSigningKeyAndSequenceNumbers);
+  RETURN_TEST_FUNC(EnumDisplayMonitors);
+  RETURN_TEST_FUNC(GetMonitorInfoW);
+  RETURN_TEST_FUNC(GetCertificateByHandle);
+  RETURN_TEST_FUNC(GetCertificateSizeByHandle);
+  NOTREACHED();
+  return nullptr;
+}
+
+bool RunTestsOnVideoOutputConfigure(uintptr_t monitor_index,
+                                    IOPMVideoOutput* video_output) {
+  OPM_CONFIGURE_PARAMETERS config_params = {};
+  OPM_SET_PROTECTION_LEVEL_PARAMETERS* protection_level =
+      reinterpret_cast<OPM_SET_PROTECTION_LEVEL_PARAMETERS*>(
+          config_params.abParameters);
+  protection_level->ulProtectionType = OPM_PROTECTION_TYPE_HDCP;
+  protection_level->ulProtectionLevel = OPM_HDCP_ON;
+  config_params.guidSetting = OPM_SET_PROTECTION_LEVEL;
+  config_params.cbParametersSize = sizeof(OPM_SET_PROTECTION_LEVEL_PARAMETERS);
+  HRESULT hr = video_output->Configure(&config_params, 0, nullptr);
+  if (FAILED(hr))
+    return false;
+  protection_level->ulProtectionType = OPM_PROTECTION_TYPE_DPCP;
+  hr = video_output->Configure(&config_params, 0, nullptr);
+  if (FAILED(hr))
+    return false;
+  protection_level->ulProtectionLevel = OPM_HDCP_OFF;
+  hr = video_output->Configure(&config_params, 0, nullptr);
+  if (FAILED(hr))
+    return false;
+  BYTE dummy_byte = 0;
+  hr = video_output->Configure(&config_params, 1, &dummy_byte);
+  if (SUCCEEDED(hr))
+    return false;
+  protection_level->ulProtectionType = 0xFFFFFFFF;
+  hr = video_output->Configure(&config_params, 0, nullptr);
+  if (SUCCEEDED(hr))
+    return false;
+  // Invalid protection level test.
+  protection_level->ulProtectionType = OPM_PROTECTION_TYPE_HDCP;
+  protection_level->ulProtectionLevel = OPM_HDCP_ON + 1;
+  hr = video_output->Configure(&config_params, 0, nullptr);
+  if (SUCCEEDED(hr))
+    return false;
+  hr = video_output->Configure(&config_params, 0, nullptr);
+  if (SUCCEEDED(hr))
+    return false;
+  config_params.guidSetting = OPM_SET_HDCP_SRM;
+  OPM_SET_HDCP_SRM_PARAMETERS* srm_parameters =
+      reinterpret_cast<OPM_SET_HDCP_SRM_PARAMETERS*>(
+          config_params.abParameters);
+  srm_parameters->ulSRMVersion = 1;
+  config_params.cbParametersSize = sizeof(OPM_SET_HDCP_SRM_PARAMETERS);
+  hr = video_output->Configure(&config_params, 0, nullptr);
+  if (SUCCEEDED(hr))
+    return false;
+  return true;
+}
+
+bool RunTestsOnVideoOutputFinishInitialization(uintptr_t monitor_index,
+                                               IOPMVideoOutput* video_output) {
+  OPM_ENCRYPTED_INITIALIZATION_PARAMETERS init_params = {};
+  memset(init_params.abEncryptedInitializationParameters, 'a' + monitor_index,
+         sizeof(init_params.abEncryptedInitializationParameters));
+  HRESULT hr = video_output->FinishInitialization(&init_params);
+  if (FAILED(hr))
+    return false;
+  memset(init_params.abEncryptedInitializationParameters, 'Z' + monitor_index,
+         sizeof(init_params.abEncryptedInitializationParameters));
+  hr = video_output->FinishInitialization(&init_params);
+  if (SUCCEEDED(hr))
+    return false;
+  return true;
+}
+
+bool RunTestsOnVideoOutputStartInitialization(uintptr_t monitor_index,
+                                              IOPMVideoOutput* video_output) {
+  OPM_RANDOM_NUMBER random_number = {};
+  BYTE* certificate = nullptr;
+  ULONG certificate_length = 0;
+
+  HRESULT hr = video_output->StartInitialization(&random_number, &certificate,
+                                                 &certificate_length);
+  if (FAILED(hr))
+    return false;
+
+  if (certificate_length != CalculateCertLength(monitor_index))
+    return false;
+
+  for (ULONG i = 0; i < certificate_length; ++i) {
+    if (certificate[i] != 'A' + monitor_index)
+      return false;
+  }
+
+  for (ULONG i = 0; i < sizeof(random_number.abRandomNumber); ++i) {
+    if (random_number.abRandomNumber[i] != '!' + monitor_index)
+      return false;
+  }
+
+  return true;
+}
+
+static bool SendSingleGetInfoRequest(uintptr_t monitor_index,
+                                     IOPMVideoOutput* video_output,
+                                     const GUID& request,
+                                     ULONG data_length,
+                                     void* data) {
+  OPM_GET_INFO_PARAMETERS params = {};
+  OPM_REQUESTED_INFORMATION requested_information = {};
+  BYTE* requested_information_ptr =
+      reinterpret_cast<BYTE*>(&requested_information);
+  params.guidInformation = request;
+  params.cbParametersSize = data_length;
+  memcpy(params.abParameters, data, data_length);
+  HRESULT hr = video_output->GetInformation(&params, &requested_information);
+  if (FAILED(hr))
+    return false;
+  for (size_t i = 0; i < sizeof(OPM_REQUESTED_INFORMATION); ++i) {
+    if (requested_information_ptr[i] != '0' + monitor_index)
+      return false;
+  }
+  return true;
+}
+
+bool RunTestsOnVideoOutputGetInformation(uintptr_t monitor_index,
+                                         IOPMVideoOutput* video_output) {
+  ULONG dummy = 0;
+  if (!SendSingleGetInfoRequest(monitor_index, video_output,
+                                OPM_GET_CONNECTOR_TYPE, 0, nullptr)) {
+    return false;
+  }
+  if (!SendSingleGetInfoRequest(monitor_index, video_output,
+                                OPM_GET_SUPPORTED_PROTECTION_TYPES, 0,
+                                nullptr)) {
+    return false;
+  }
+  // These should fail due to invalid parameter sizes.
+  if (SendSingleGetInfoRequest(monitor_index, video_output,
+                               OPM_GET_CONNECTOR_TYPE, sizeof(dummy), &dummy)) {
+    return false;
+  }
+  if (SendSingleGetInfoRequest(monitor_index, video_output,
+                               OPM_GET_SUPPORTED_PROTECTION_TYPES,
+                               sizeof(dummy), &dummy)) {
+    return false;
+  }
+  ULONG protection_type = OPM_PROTECTION_TYPE_HDCP;
+  if (!SendSingleGetInfoRequest(monitor_index, video_output,
+                                OPM_GET_ACTUAL_PROTECTION_LEVEL,
+                                sizeof(protection_type), &protection_type)) {
+    return false;
+  }
+  protection_type = OPM_PROTECTION_TYPE_DPCP;
+  if (!SendSingleGetInfoRequest(monitor_index, video_output,
+                                OPM_GET_ACTUAL_PROTECTION_LEVEL,
+                                sizeof(protection_type), &protection_type)) {
+    return false;
+  }
+  // These should fail as unsupported or invalid parameters.
+  protection_type = OPM_PROTECTION_TYPE_ACP;
+  if (SendSingleGetInfoRequest(monitor_index, video_output,
+                               OPM_GET_ACTUAL_PROTECTION_LEVEL,
+                               sizeof(protection_type), &protection_type)) {
+    return false;
+  }
+  if (SendSingleGetInfoRequest(monitor_index, video_output,
+                               OPM_GET_ACTUAL_PROTECTION_LEVEL, 0, nullptr)) {
+    return false;
+  }
+  protection_type = OPM_PROTECTION_TYPE_HDCP;
+  if (!SendSingleGetInfoRequest(monitor_index, video_output,
+                                OPM_GET_VIRTUAL_PROTECTION_LEVEL,
+                                sizeof(protection_type), &protection_type)) {
+    return false;
+  }
+  protection_type = OPM_PROTECTION_TYPE_DPCP;
+  if (!SendSingleGetInfoRequest(monitor_index, video_output,
+                                OPM_GET_VIRTUAL_PROTECTION_LEVEL,
+                                sizeof(protection_type), &protection_type)) {
+    return false;
+  }
+  // These should fail as unsupported or invalid parameters.
+  protection_type = OPM_PROTECTION_TYPE_ACP;
+  if (SendSingleGetInfoRequest(monitor_index, video_output,
+                               OPM_GET_VIRTUAL_PROTECTION_LEVEL,
+                               sizeof(protection_type), &protection_type)) {
+    return false;
+  }
+  if (SendSingleGetInfoRequest(monitor_index, video_output,
+                               OPM_GET_VIRTUAL_PROTECTION_LEVEL, 0, nullptr)) {
+    return false;
+  }
+  // This should fail with unsupported request.
+  if (SendSingleGetInfoRequest(monitor_index, video_output, OPM_GET_CODEC_INFO,
+                               0, nullptr)) {
+    return false;
+  }
+  return true;
+}
+
+int RunTestsOnVideoOutput(uintptr_t monitor_index,
+                          IOPMVideoOutput* video_output) {
+  if (!RunTestsOnVideoOutputStartInitialization(monitor_index, video_output))
+    return sandbox::SBOX_TEST_FIRST_ERROR;
+
+  if (!RunTestsOnVideoOutputFinishInitialization(monitor_index, video_output))
+    return sandbox::SBOX_TEST_SECOND_ERROR;
+
+  if (!RunTestsOnVideoOutputConfigure(monitor_index, video_output))
+    return sandbox::SBOX_TEST_THIRD_ERROR;
+
+  if (!RunTestsOnVideoOutputGetInformation(monitor_index, video_output))
+    return sandbox::SBOX_TEST_FOURTH_ERROR;
+
+  return sandbox::SBOX_TEST_SUCCEEDED;
+}
+
+}  // namespace
+
+namespace sandbox {
+
+//------------------------------------------------------------------------------
+// Exported functions called by child test processes.
+//------------------------------------------------------------------------------
+
+SBOX_TESTS_COMMAND int CheckWin8MonitorsRedirection(int argc, wchar_t** argv) {
+  std::map<HMONITOR, base::string16> monitors = EnumerateMonitors();
+  std::map<HMONITOR, base::string16> monitors_to_test = GetTestMonitors();
+  if (monitors.size() != monitors_to_test.size())
+    return SBOX_TEST_FIRST_ERROR;
+
+  for (const auto& monitor : monitors) {
+    auto result = monitors_to_test.find(monitor.first);
+    if (result == monitors_to_test.end())
+      return SBOX_TEST_SECOND_ERROR;
+    if (result->second != monitor.second)
+      return SBOX_TEST_THIRD_ERROR;
+  }
+  return SBOX_TEST_SUCCEEDED;
+}
+
+SBOX_TESTS_COMMAND int CheckWin8MonitorInfo(int argc, wchar_t** argv) {
+  std::map<HMONITOR, base::string16> monitors_to_test = GetTestMonitors();
+  MONITORINFO monitor_info = {};
+  MONITORINFOEXW monitor_info_exw = {};
+  MONITORINFOEXA monitor_info_exa = {};
+  HMONITOR valid_monitor = monitors_to_test.begin()->first;
+  std::wstring valid_device = monitors_to_test.begin()->second;
+  monitor_info.cbSize = sizeof(MONITORINFO);
+  if (!::GetMonitorInfoW(valid_monitor, &monitor_info))
+    return SBOX_TEST_FIRST_ERROR;
+  monitor_info.cbSize = sizeof(MONITORINFO);
+  if (!::GetMonitorInfoA(valid_monitor, &monitor_info))
+    return SBOX_TEST_SECOND_ERROR;
+  monitor_info_exw.cbSize = sizeof(MONITORINFOEXW);
+  if (!::GetMonitorInfoW(valid_monitor,
+                         reinterpret_cast<MONITORINFO*>(&monitor_info_exw)) ||
+      valid_device != monitor_info_exw.szDevice) {
+    return SBOX_TEST_THIRD_ERROR;
+  }
+  monitor_info_exa.cbSize = sizeof(MONITORINFOEXA);
+  if (!::GetMonitorInfoA(valid_monitor,
+                         reinterpret_cast<MONITORINFO*>(&monitor_info_exa)) ||
+      valid_device != base::ASCIIToUTF16(monitor_info_exa.szDevice)) {
+    return SBOX_TEST_FOURTH_ERROR;
+  }
+
+  // Invalid size checks.
+  monitor_info.cbSize = 0;
+  if (::GetMonitorInfoW(valid_monitor, &monitor_info))
+    return SBOX_TEST_FIFTH_ERROR;
+  monitor_info.cbSize = 0x10000;
+  if (::GetMonitorInfoW(valid_monitor, &monitor_info))
+    return SBOX_TEST_SIXTH_ERROR;
+
+  // Check that an invalid handle isn't accepted.
+  HMONITOR invalid_monitor = reinterpret_cast<HMONITOR>(-1);
+  monitor_info.cbSize = sizeof(MONITORINFO);
+  if (::GetMonitorInfoW(invalid_monitor, &monitor_info))
+    return SBOX_TEST_SEVENTH_ERROR;
+
+  return SBOX_TEST_SUCCEEDED;
+}
+
+SBOX_TESTS_COMMAND int CheckWin8OPMApis(int argc, wchar_t** argv) {
+  std::map<HMONITOR, base::string16> monitors = GetTestMonitors();
+  for (const auto& monitor : monitors) {
+    ULONG output_count = 0;
+    IOPMVideoOutput** outputs = nullptr;
+    uintptr_t monitor_index = reinterpret_cast<uintptr_t>(monitor.first) & 0xF;
+    HRESULT hr = OPMGetVideoOutputsFromHMONITOR(
+        monitor.first, OPM_VOS_OPM_SEMANTICS, &output_count, &outputs);
+    if (monitor_index > 4) {
+      // These should fail because the certificate is too large.
+      if (SUCCEEDED(hr))
+        return SBOX_TEST_FIRST_ERROR;
+      continue;
+    }
+    if (FAILED(hr))
+      return SBOX_TEST_SECOND_ERROR;
+    if (output_count != monitor_index - 1)
+      return SBOX_TEST_THIRD_ERROR;
+    for (ULONG output_index = 0; output_index < output_count; ++output_index) {
+      int result = RunTestsOnVideoOutput(monitor_index, outputs[output_index]);
+      outputs[output_index]->Release();
+      if (result != SBOX_TEST_SUCCEEDED)
+        return result;
+    }
+    ::CoTaskMemFree(outputs);
+  }
+  return SBOX_TEST_SUCCEEDED;
+}
+
+//------------------------------------------------------------------------------
+// Exported Win32k Lockdown Tests
+//------------------------------------------------------------------------------
+
+// This test validates that setting the MITIGATION_WIN32K_DISABLE mitigation on
+// the target process causes the launch to fail in process initialization.
+// The test process itself links against user32/gdi32.
+TEST(ProcessMitigationsWin32kTest, CheckWin8LockDownFailure) {
+  if (base::win::GetVersion() < base::win::VERSION_WIN8)
+    return;
+
+  std::wstring test_policy_command = L"CheckPolicy ";
+  test_policy_command += std::to_wstring(TESTPOLICY_WIN32K);
+
+  TestRunner runner;
+  sandbox::TargetPolicy* policy = runner.GetPolicy();
+
+  EXPECT_EQ(policy->SetProcessMitigations(MITIGATION_WIN32K_DISABLE),
+            SBOX_ALL_OK);
+  EXPECT_NE(SBOX_TEST_SUCCEEDED, runner.RunTest(test_policy_command.c_str()));
+}
+
+// This test validates that setting the MITIGATION_WIN32K_DISABLE mitigation
+// along with the policy to fake user32 and gdi32 initialization successfully
+// launches the target process.
+// The test process itself links against user32/gdi32.
+TEST(ProcessMitigationsWin32kTest, CheckWin8LockDownSuccess) {
+  if (base::win::GetVersion() < base::win::VERSION_WIN8)
+    return;
+
+  std::wstring test_policy_command = L"CheckPolicy ";
+  test_policy_command += std::to_wstring(TESTPOLICY_WIN32K);
+
+  TestRunner runner;
+  sandbox::TargetPolicy* policy = runner.GetPolicy();
+  ProcessMitigationsWin32KLockdownPolicy::SetOverrideForTestCallback(
+      FunctionOverrideForTest);
+
+  EXPECT_EQ(policy->SetProcessMitigations(MITIGATION_WIN32K_DISABLE),
+            SBOX_ALL_OK);
+  EXPECT_EQ(policy->AddRule(sandbox::TargetPolicy::SUBSYS_WIN32K_LOCKDOWN,
+                            sandbox::TargetPolicy::FAKE_USER_GDI_INIT, NULL),
+            sandbox::SBOX_ALL_OK);
+  EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(test_policy_command.c_str()));
+  EXPECT_NE(SBOX_TEST_SUCCEEDED,
+            runner.RunTest(L"CheckWin8MonitorsRedirection"));
+  EXPECT_NE(SBOX_TEST_SUCCEEDED, runner.RunTest(L"CheckWin8MonitorInfo"));
+  EXPECT_NE(SBOX_TEST_SUCCEEDED, runner.RunTest(L"CheckWin8OPMApis"));
+}
+
+// This test validates the even though we're running under win32k lockdown
+// we can use the IPC redirection to enumerate the list of monitors.
+TEST(ProcessMitigationsWin32kTest, CheckWin8Redirection) {
+  if (base::win::GetVersion() < base::win::VERSION_WIN8)
+    return;
+
+  std::wstring test_policy_command = L"CheckPolicy ";
+  test_policy_command += std::to_wstring(TESTPOLICY_WIN32K);
+
+  TestRunner runner;
+  sandbox::TargetPolicy* policy = runner.GetPolicy();
+  ProcessMitigationsWin32KLockdownPolicy::SetOverrideForTestCallback(
+      FunctionOverrideForTest);
+
+  EXPECT_EQ(policy->SetProcessMitigations(MITIGATION_WIN32K_DISABLE),
+            SBOX_ALL_OK);
+  EXPECT_EQ(policy->AddRule(sandbox::TargetPolicy::SUBSYS_WIN32K_LOCKDOWN,
+                            sandbox::TargetPolicy::IMPLEMENT_OPM_APIS, NULL),
+            sandbox::SBOX_ALL_OK);
+  policy->SetEnableOPMRedirection();
+  EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(test_policy_command.c_str()));
+  EXPECT_EQ(SBOX_TEST_SUCCEEDED,
+            runner.RunTest(L"CheckWin8MonitorsRedirection"));
+  EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"CheckWin8MonitorInfo"));
+  EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"CheckWin8OPMApis"));
+}
+
+}  // namespace sandbox