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// Copyright (c) 2011 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 "base/strings/stringprintf.h"
#include "base/win/scoped_handle.h"
#include "base/win/windows_version.h"
#include "sandbox/win/src/nt_internals.h"
#include "sandbox/win/src/process_mitigations.h"
#include "sandbox/win/src/sandbox.h"
#include "sandbox/win/src/sandbox_factory.h"
#include "sandbox/win/src/target_services.h"
#include "sandbox/win/src/win_utils.h"
#include "sandbox/win/tests/common/controller.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace {
typedef BOOL (WINAPI *GetProcessDEPPolicyFunction)(
HANDLE process,
LPDWORD flags,
PBOOL permanent);
typedef BOOL (WINAPI *GetProcessMitigationPolicyFunction)(
HANDLE process,
PROCESS_MITIGATION_POLICY mitigation_policy,
PVOID buffer,
SIZE_T length);
GetProcessMitigationPolicyFunction get_process_mitigation_policy;
#if !defined(_WIN64)
bool CheckWin8DepPolicy() {
PROCESS_MITIGATION_DEP_POLICY policy = {};
if (!get_process_mitigation_policy(::GetCurrentProcess(), ProcessDEPPolicy,
&policy, sizeof(policy))) {
return false;
}
return policy.Enable && policy.Permanent;
}
#endif // !defined(_WIN64)
#if defined(NDEBUG)
bool CheckWin8AslrPolicy() {
PROCESS_MITIGATION_ASLR_POLICY policy = {};
if (!get_process_mitigation_policy(::GetCurrentProcess(), ProcessASLRPolicy,
&policy, sizeof(policy))) {
return false;
}
return policy.EnableForceRelocateImages && policy.DisallowStrippedImages;
}
#endif // defined(NDEBUG)
bool CheckWin8StrictHandlePolicy() {
PROCESS_MITIGATION_STRICT_HANDLE_CHECK_POLICY policy = {};
if (!get_process_mitigation_policy(::GetCurrentProcess(),
ProcessStrictHandleCheckPolicy,
&policy, sizeof(policy))) {
return false;
}
return policy.RaiseExceptionOnInvalidHandleReference &&
policy.HandleExceptionsPermanentlyEnabled;
}
bool CheckWin8Win32CallPolicy() {
PROCESS_MITIGATION_SYSTEM_CALL_DISABLE_POLICY policy = {};
if (!get_process_mitigation_policy(::GetCurrentProcess(),
ProcessSystemCallDisablePolicy,
&policy, sizeof(policy))) {
return false;
}
return policy.DisallowWin32kSystemCalls;
}
bool CheckWin8DllExtensionPolicy() {
PROCESS_MITIGATION_EXTENSION_POINT_DISABLE_POLICY policy = {};
if (!get_process_mitigation_policy(::GetCurrentProcess(),
ProcessExtensionPointDisablePolicy,
&policy, sizeof(policy))) {
return false;
}
return policy.DisableExtensionPoints;
}
} // namespace
namespace sandbox {
SBOX_TESTS_COMMAND int CheckWin8(int argc, wchar_t **argv) {
get_process_mitigation_policy =
reinterpret_cast<GetProcessMitigationPolicyFunction>(
::GetProcAddress(::GetModuleHandleW(L"kernel32.dll"),
"GetProcessMitigationPolicy"));
if (!get_process_mitigation_policy)
return SBOX_TEST_NOT_FOUND;
#if !defined(_WIN64) // DEP is always enabled on 64-bit.
if (!CheckWin8DepPolicy())
return SBOX_TEST_FIRST_ERROR;
#endif
#if defined(NDEBUG) // ASLR cannot be forced in debug builds.
if (!CheckWin8AslrPolicy())
return SBOX_TEST_SECOND_ERROR;
#endif
if (!CheckWin8StrictHandlePolicy())
return SBOX_TEST_THIRD_ERROR;
if (!CheckWin8DllExtensionPolicy())
return SBOX_TEST_FIFTH_ERROR;
return SBOX_TEST_SUCCEEDED;
}
TEST(ProcessMitigationsTest, CheckWin8) {
if (base::win::GetVersion() < base::win::VERSION_WIN8)
return;
TestRunner runner;
sandbox::TargetPolicy* policy = runner.GetPolicy();
sandbox::MitigationFlags mitigations = MITIGATION_DEP |
MITIGATION_DEP_NO_ATL_THUNK |
MITIGATION_EXTENSION_DLL_DISABLE;
#if defined(NDEBUG) // ASLR cannot be forced in debug builds.
mitigations |= MITIGATION_RELOCATE_IMAGE |
MITIGATION_RELOCATE_IMAGE_REQUIRED;
#endif
EXPECT_EQ(policy->SetProcessMitigations(mitigations), SBOX_ALL_OK);
mitigations |= MITIGATION_STRICT_HANDLE_CHECKS;
EXPECT_EQ(policy->SetDelayedProcessMitigations(mitigations), SBOX_ALL_OK);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"CheckWin8"));
}
SBOX_TESTS_COMMAND int CheckDep(int argc, wchar_t **argv) {
GetProcessDEPPolicyFunction get_process_dep_policy =
reinterpret_cast<GetProcessDEPPolicyFunction>(
::GetProcAddress(::GetModuleHandleW(L"kernel32.dll"),
"GetProcessDEPPolicy"));
if (get_process_dep_policy) {
BOOL is_permanent = FALSE;
DWORD dep_flags = 0;
if (!get_process_dep_policy(::GetCurrentProcess(), &dep_flags,
&is_permanent)) {
return SBOX_TEST_FIRST_ERROR;
}
if (!(dep_flags & PROCESS_DEP_ENABLE) || !is_permanent)
return SBOX_TEST_SECOND_ERROR;
} else {
NtQueryInformationProcessFunction query_information_process = NULL;
ResolveNTFunctionPtr("NtQueryInformationProcess",
&query_information_process);
if (!query_information_process)
return SBOX_TEST_NOT_FOUND;
ULONG size = 0;
ULONG dep_flags = 0;
if (!SUCCEEDED(query_information_process(::GetCurrentProcess(),
ProcessExecuteFlags, &dep_flags,
sizeof(dep_flags), &size))) {
return SBOX_TEST_THIRD_ERROR;
}
static const int MEM_EXECUTE_OPTION_DISABLE = 2;
static const int MEM_EXECUTE_OPTION_PERMANENT = 8;
dep_flags &= 0xff;
if (dep_flags != (MEM_EXECUTE_OPTION_DISABLE |
MEM_EXECUTE_OPTION_PERMANENT)) {
return SBOX_TEST_FOURTH_ERROR;
}
}
return SBOX_TEST_SUCCEEDED;
}
#if !defined(_WIN64) // DEP is always enabled on 64-bit.
TEST(ProcessMitigationsTest, CheckDep) {
if (base::win::GetVersion() > base::win::VERSION_WIN7)
return;
TestRunner runner;
sandbox::TargetPolicy* policy = runner.GetPolicy();
EXPECT_EQ(policy->SetProcessMitigations(
MITIGATION_DEP |
MITIGATION_DEP_NO_ATL_THUNK |
MITIGATION_SEHOP),
SBOX_ALL_OK);
EXPECT_EQ(SBOX_TEST_SUCCEEDED, runner.RunTest(L"CheckDep"));
}
#endif
SBOX_TESTS_COMMAND int CheckWin8Lockdown(int argc, wchar_t **argv) {
get_process_mitigation_policy =
reinterpret_cast<GetProcessMitigationPolicyFunction>(
::GetProcAddress(::GetModuleHandleW(L"kernel32.dll"),
"GetProcessMitigationPolicy"));
if (!get_process_mitigation_policy)
return SBOX_TEST_NOT_FOUND;
if (!CheckWin8Win32CallPolicy())
return SBOX_TEST_FIRST_ERROR;
return SBOX_TEST_SUCCEEDED;
}
// 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(ProcessMitigationsTest, CheckWin8Win32KLockDownFailure) {
if (base::win::GetVersion() < base::win::VERSION_WIN8)
return;
TestRunner runner;
sandbox::TargetPolicy* policy = runner.GetPolicy();
EXPECT_EQ(policy->SetProcessMitigations(MITIGATION_WIN32K_DISABLE),
SBOX_ALL_OK);
EXPECT_NE(SBOX_TEST_SUCCEEDED, runner.RunTest(L"CheckWin8Lockdown"));
}
// 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(ProcessMitigationsTest, CheckWin8Win32KLockDownSuccess) {
if (base::win::GetVersion() < base::win::VERSION_WIN8)
return;
TestRunner runner;
sandbox::TargetPolicy* policy = runner.GetPolicy();
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(L"CheckWin8Lockdown"));
}
} // namespace sandbox
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