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// 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 "content/browser/sandbox_parameters_mac.h"
#include <unistd.h>
#include "base/check.h"
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/files/file_util.h"
#include "base/mac/bundle_locations.h"
#include "base/mac/foundation_util.h"
#include "base/mac/mac_util.h"
#include "base/no_destructor.h"
#include "base/numerics/checked_math.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/stringprintf.h"
#include "base/strings/sys_string_conversions.h"
#include "base/system/sys_info.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/common/content_client.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "components/services/screen_ai/buildflags/buildflags.h"
#include "ppapi/buildflags/buildflags.h"
#include "printing/buildflags/buildflags.h"
#include "sandbox/mac/seatbelt_exec.h"
#include "sandbox/policy/mac/params.h"
#include "sandbox/policy/mac/sandbox_mac.h"
#include "sandbox/policy/mojom/sandbox.mojom.h"
#include "sandbox/policy/switches.h"
#include "third_party/abseil-cpp/absl/types/optional.h"
#if BUILDFLAG(ENABLE_PLUGINS)
#include "content/public/browser/plugin_service.h"
#include "content/public/common/pepper_plugin_info.h"
#endif
namespace content {
#if defined(TOOLKIT_QT)
base::FilePath getSandboxPath();
#endif
namespace {
absl::optional<base::FilePath>& GetNetworkTestCertsDirectory() {
// Set by SetNetworkTestCertsDirectoryForTesting().
static base::NoDestructor<absl::optional<base::FilePath>>
network_test_certs_dir;
return *network_test_certs_dir;
}
// Produce the OS version as an integer "1010", etc. and pass that to the
// profile. The profile converts the string back to a number and can do
// comparison operations on OS version.
std::string GetOSVersion() {
int32_t major_version, minor_version, bugfix_version;
base::SysInfo::OperatingSystemVersionNumbers(&major_version, &minor_version,
&bugfix_version);
base::CheckedNumeric<int32_t> os_version(major_version);
os_version *= 100;
os_version += minor_version;
int32_t final_os_version = os_version.ValueOrDie();
return std::to_string(final_os_version);
}
// Retrieves the users shared darwin dirs and adds it to the profile.
void AddDarwinDirs(sandbox::SeatbeltExecClient* client) {
char dir_path[PATH_MAX + 1];
size_t rv = confstr(_CS_DARWIN_USER_CACHE_DIR, dir_path, sizeof(dir_path));
PCHECK(rv != 0);
CHECK(client->SetParameter(
sandbox::policy::kParamDarwinUserCacheDir,
sandbox::policy::GetCanonicalPath(base::FilePath(dir_path)).value()));
rv = confstr(_CS_DARWIN_USER_DIR, dir_path, sizeof(dir_path));
PCHECK(rv != 0);
CHECK(client->SetParameter(
sandbox::policy::kParamDarwinUserDir,
sandbox::policy::GetCanonicalPath(base::FilePath(dir_path)).value()));
rv = confstr(_CS_DARWIN_USER_TEMP_DIR, dir_path, sizeof(dir_path));
PCHECK(rv != 0);
CHECK(client->SetParameter(
sandbox::policy::kParamDarwinUserTempDir,
sandbox::policy::GetCanonicalPath(base::FilePath(dir_path)).value()));
}
// All of the below functions populate the |client| with the parameters that the
// sandbox needs to resolve information that cannot be known at build time, such
// as the user's home directory.
void SetupCommonSandboxParameters(sandbox::SeatbeltExecClient* client) {
const base::CommandLine* command_line =
base::CommandLine::ForCurrentProcess();
bool enable_logging =
command_line->HasSwitch(sandbox::policy::switches::kEnableSandboxLogging);
CHECK(client->SetBooleanParameter(sandbox::policy::kParamEnableLogging,
enable_logging));
CHECK(client->SetBooleanParameter(
sandbox::policy::kParamDisableSandboxDenialLogging, !enable_logging));
std::string bundle_path =
sandbox::policy::GetCanonicalPath(base::mac::MainBundlePath()).value();
CHECK(client->SetParameter(sandbox::policy::kParamBundlePath, bundle_path));
std::string bundle_id = base::mac::BaseBundleID();
DCHECK(!bundle_id.empty()) << "base::mac::OuterBundle is unset";
CHECK(client->SetParameter(sandbox::policy::kParamBundleId, bundle_id));
CHECK(client->SetParameter(sandbox::policy::kParamBrowserPid,
std::to_string(getpid())));
std::string logging_path =
GetContentClient()->browser()->GetLoggingFileName(*command_line).value();
CHECK(client->SetParameter(sandbox::policy::kParamLogFilePath, logging_path));
#if defined(COMPONENT_BUILD)
// For component builds, allow access to one directory level higher, where
// the dylibs live.
base::FilePath component_path = base::mac::MainBundlePath().Append("..");
std::string component_path_canonical =
sandbox::policy::GetCanonicalPath(component_path).value();
CHECK(client->SetParameter(sandbox::policy::kParamComponentPath,
component_path_canonical));
#endif
CHECK(client->SetParameter(sandbox::policy::kParamOsVersion, GetOSVersion()));
#if defined(TOOLKIT_QT)
// Allow read access to files under the Qt path.
const base::FilePath qt_prefix_path = getSandboxPath();
const std::string qt_prefix_path_canonical =
sandbox::policy::GetCanonicalPath(qt_prefix_path).value();
CHECK(client->SetParameter(sandbox::policy::kParamQtPrefixPath,
qt_prefix_path_canonical));
#endif
std::string homedir =
sandbox::policy::GetCanonicalPath(base::GetHomeDir()).value();
CHECK(client->SetParameter(sandbox::policy::kParamHomedirAsLiteral, homedir));
CHECK(client->SetBooleanParameter(
sandbox::policy::kParamFilterSyscalls,
base::FeatureList::IsEnabled(features::kMacSyscallSandbox)));
CHECK(client->SetBooleanParameter(sandbox::policy::kParamFilterSyscallsDebug,
false));
}
void SetupNetworkSandboxParameters(sandbox::SeatbeltExecClient* client) {
SetupCommonSandboxParameters(client);
std::vector<base::FilePath> storage_paths =
GetContentClient()->browser()->GetNetworkContextsParentDirectory();
AddDarwinDirs(client);
CHECK(client->SetParameter(
sandbox::policy::kParamNetworkServiceStoragePathsCount,
base::NumberToString(storage_paths.size())));
for (size_t i = 0; i < storage_paths.size(); ++i) {
base::FilePath path = sandbox::policy::GetCanonicalPath(storage_paths[i]);
std::string param_name = base::StringPrintf(
"%s%zu", sandbox::policy::kParamNetworkServiceStoragePathN, i);
CHECK(client->SetParameter(param_name, path.value())) << param_name;
}
if (GetNetworkTestCertsDirectory().has_value()) {
CHECK(client->SetParameter(
sandbox::policy::kParamNetworkServiceTestCertsDir,
sandbox::policy::GetCanonicalPath(*GetNetworkTestCertsDirectory())
.value()));
}
}
#if BUILDFLAG(ENABLE_PLUGINS)
void SetupPPAPISandboxParameters(sandbox::SeatbeltExecClient* client) {
SetupCommonSandboxParameters(client);
std::vector<content::WebPluginInfo> plugins;
PluginService::GetInstance()->GetInternalPlugins(&plugins);
base::FilePath bundle_path =
sandbox::policy::GetCanonicalPath(base::mac::MainBundlePath());
const std::string param_base_name = "PPAPI_PATH_";
int index = 0;
for (const auto& plugin : plugins) {
// Only add plugins which are external to Chrome's bundle to the profile.
if (!bundle_path.IsParent(plugin.path) && plugin.path.IsAbsolute()) {
std::string param_name =
param_base_name + base::StringPrintf("%d", index++);
CHECK(client->SetParameter(param_name, plugin.path.value()));
}
}
// The profile does not support more than 4 PPAPI plugins, but it will be set
// to n+1 more than the plugins added.
CHECK(index <= 5);
}
#endif
void SetupGpuSandboxParameters(sandbox::SeatbeltExecClient* client,
const base::CommandLine& command_line) {
SetupCommonSandboxParameters(client);
AddDarwinDirs(client);
CHECK(client->SetBooleanParameter(
sandbox::policy::kParamDisableMetalShaderCache,
command_line.HasSwitch(
sandbox::policy::switches::kDisableMetalShaderCache)));
}
} // namespace
void SetupSandboxParameters(sandbox::mojom::Sandbox sandbox_type,
const base::CommandLine& command_line,
sandbox::SeatbeltExecClient* client) {
switch (sandbox_type) {
case sandbox::mojom::Sandbox::kAudio:
case sandbox::mojom::Sandbox::kCdm:
case sandbox::mojom::Sandbox::kMirroring:
case sandbox::mojom::Sandbox::kNaClLoader:
#if BUILDFLAG(ENABLE_OOP_PRINTING)
case sandbox::mojom::Sandbox::kPrintBackend:
#endif
case sandbox::mojom::Sandbox::kPrintCompositor:
case sandbox::mojom::Sandbox::kRenderer:
case sandbox::mojom::Sandbox::kService:
case sandbox::mojom::Sandbox::kServiceWithJit:
case sandbox::mojom::Sandbox::kUtility:
SetupCommonSandboxParameters(client);
break;
case sandbox::mojom::Sandbox::kGpu: {
SetupGpuSandboxParameters(client, command_line);
break;
}
case sandbox::mojom::Sandbox::kNetwork:
SetupNetworkSandboxParameters(client);
break;
#if BUILDFLAG(ENABLE_PLUGINS)
case sandbox::mojom::Sandbox::kPpapi:
SetupPPAPISandboxParameters(client);
break;
#endif
case sandbox::mojom::Sandbox::kNoSandbox:
CHECK(false) << "Unhandled parameters for sandbox_type "
<< static_cast<int>(sandbox_type);
break;
// Setup parameters for sandbox types handled by embedders below.
#if BUILDFLAG(ENABLE_SCREEN_AI_SERVICE)
case sandbox::mojom::Sandbox::kScreenAI:
#endif
case sandbox::mojom::Sandbox::kSpeechRecognition:
SetupCommonSandboxParameters(client);
CHECK(GetContentClient()->browser()->SetupEmbedderSandboxParameters(
sandbox_type, client));
}
}
void SetNetworkTestCertsDirectoryForTesting(const base::FilePath& path) {
GetNetworkTestCertsDirectory().emplace(path);
}
} // namespace content
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