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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/service_host/utility_sandbox_delegate.h"
#include <memory>
#include "base/environment.h"
#include "base/test/scoped_feature_list.h"
#include "base/win/windows_version.h"
#include "build/build_config.h"
#include "content/public/browser/child_process_host.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_switches.h"
#include "sandbox/policy/features.h"
#include "sandbox/policy/mojom/sandbox.mojom.h"
#include "sandbox/policy/sandbox_type.h"
#include "sandbox/policy/switches.h"
#include "sandbox/policy/win/sandbox_win.h"
#include "sandbox/win/src/app_container_base.h"
#include "sandbox/win/src/sandbox_factory.h"
#include "sandbox/win/src/sandbox_policy.h"
#include "sandbox/win/src/sandbox_policy_base.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
class UtilitySandboxDelegateWinTest
: public ::testing::Test,
public ::testing::WithParamInterface<
std::tuple</*AppContainerDisabled=*/bool,
/*kPrintCompositorLPAC=*/bool>> {
public:
UtilitySandboxDelegateWinTest() = default;
void SetUp() override {
scoped_feature_list_.InitWithFeatureState(
sandbox::policy::features::kPrintCompositorLPAC,
IsLPACFeatureEnabledForTest());
}
protected:
static bool IsAppContainerDisabledForTest() {
return std::get<0>(GetParam());
}
static bool IsLPACFeatureEnabledForTest() { return std::get<1>(GetParam()); }
private:
base::test::ScopedFeatureList scoped_feature_list_;
};
TEST_P(UtilitySandboxDelegateWinTest, IsAppContainerDisabled) {
class MaybeDisableAppCongtainerBrowserClient : public ContentBrowserClient {
bool IsAppContainerDisabled(sandbox::mojom::Sandbox sandbox_type) override {
return IsAppContainerDisabledForTest();
}
} test_browser_client;
auto* old_browser_client = SetBrowserClientForTesting(&test_browser_client);
// Print compositor is chosen as a sandbox type, because it is a utility
// process that has App Container enabled by default.
constexpr auto kSandboxType = sandbox::mojom::Sandbox::kPrintCompositor;
auto cmd_line = base::CommandLine(
ChildProcessHost::GetChildPath(ChildProcessHost::CHILD_NORMAL));
cmd_line.AppendSwitchASCII(switches::kProcessType, switches::kUtilityProcess);
sandbox::policy::SetCommandLineFlagsForSandboxType(&cmd_line, kSandboxType);
base::EnvironmentMap env;
auto utility_delegate =
std::make_unique<UtilitySandboxedProcessLauncherDelegate>(kSandboxType,
env, cmd_line);
base::HandlesToInheritVector handles_to_inherit;
sandbox::BrokerServices* broker =
sandbox::SandboxFactory::GetBrokerServices();
auto policy = broker->CreatePolicy();
sandbox::ResultCode result =
sandbox::policy::SandboxWin::GeneratePolicyForSandboxedProcess(
cmd_line, handles_to_inherit, utility_delegate.get(), policy.get());
ASSERT_EQ(sandbox::ResultCode::SBOX_ALL_OK, result);
SetBrowserClientForTesting(old_browser_client);
bool expected_app_container_enabled = IsLPACFeatureEnabledForTest();
// The content client can override the state to disable it, but not to enable
// it if the feature is disabled.
if (IsAppContainerDisabledForTest()) {
expected_app_container_enabled = false;
}
if (expected_app_container_enabled) {
EXPECT_TRUE(policy->GetConfig()->GetAppContainer());
EXPECT_EQ(policy->GetConfig()->GetIntegrityLevel(),
sandbox::IntegrityLevel::INTEGRITY_LEVEL_LAST);
EXPECT_EQ(policy->GetConfig()->GetInitialTokenLevel(),
sandbox::TokenLevel::USER_UNPROTECTED);
EXPECT_EQ(policy->GetConfig()->GetLockdownTokenLevel(),
sandbox::TokenLevel::USER_UNPROTECTED);
} else {
EXPECT_FALSE(policy->GetConfig()->GetAppContainer());
EXPECT_EQ(policy->GetConfig()->GetIntegrityLevel(),
sandbox::IntegrityLevel::INTEGRITY_LEVEL_LOW);
EXPECT_EQ(policy->GetConfig()->GetInitialTokenLevel(),
sandbox::TokenLevel::USER_RESTRICTED_SAME_ACCESS);
EXPECT_EQ(policy->GetConfig()->GetLockdownTokenLevel(),
sandbox::TokenLevel::USER_LOCKDOWN);
}
}
INSTANTIATE_TEST_SUITE_P(
/* no prefix */,
UtilitySandboxDelegateWinTest,
// TODO(crbug.com/353583970): Enable `kPrintCompositorLPAC` for ARM when
// flakiness is resolved.
#if defined(ARCH_CPU_ARM_FAMILY)
::testing::Combine(/*AppContainerDisabled=*/::testing::Bool(),
/*kPrintCompositorLPAC=*/::testing::Values(false)),
#else
::testing::Combine(/*AppContainerDisabled=*/::testing::Bool(),
/*kPrintCompositorLPAC=*/::testing::Bool()),
#endif
[](const auto& info) {
return base::StrCat(
{std::get<0>(info.param) ? "ACDisabled" : "ACEnabled",
std::get<1>(info.param) ? "FeatureEnabled" : "FeatureDisabled"});
});
} // namespace content
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