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// Copyright (c) 2012 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 "chrome/browser/ui/startup/bad_flags_prompt.h"
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/feature_list.h"
#include "base/files/file_path.h"
#include "base/strings/utf_string_conversions.h"
#include "base/trace_event/memory_dump_manager.h"
#include "build/build_config.h"
#include "chrome/browser/infobars/infobar_service.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/simple_message_box.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/common/chrome_paths.h"
#include "chrome/common/chrome_switches.h"
#include "chrome/grit/chromium_strings.h"
#include "chrome/grit/generated_resources.h"
#include "components/autofill/core/common/autofill_switches.h"
#include "components/infobars/core/infobar_delegate.h"
#include "components/infobars/core/simple_alert_infobar_delegate.h"
#include "components/invalidation/impl/invalidation_switches.h"
#include "components/nacl/common/buildflags.h"
#include "components/nacl/common/nacl_switches.h"
#include "components/network_session_configurator/common/network_switches.h"
#include "components/startup_metric_utils/browser/startup_metric_utils.h"
#include "components/translate/core/common/translate_switches.h"
#include "content/public/common/content_features.h"
#include "content/public/common/content_switches.h"
#include "extensions/common/switches.h"
#include "google_apis/gaia/gaia_switches.h"
#include "media/base/media_switches.h"
#include "media/media_buildflags.h"
#include "services/network/public/cpp/network_switches.h"
#include "services/service_manager/sandbox/switches.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/resource/resource_bundle.h"
#if defined(OS_ANDROID)
#include "chrome/browser/android/chrome_feature_list.h"
#endif // OS_ANDROID
namespace chrome {
namespace {
#if !defined(OS_ANDROID)
// Dangerous command line flags for which to display a warning that "stability
// and security will suffer".
static const char* kBadFlags[] = {
network::switches::kIgnoreCertificateErrorsSPKIList,
// These flags disable sandbox-related security.
service_manager::switches::kDisableGpuSandbox,
service_manager::switches::kDisableSeccompFilterSandbox,
service_manager::switches::kDisableSetuidSandbox,
service_manager::switches::kNoSandbox,
#if defined(OS_WIN)
service_manager::switches::kAllowThirdPartyModules,
#endif
switches::kDisableWebSecurity,
#if BUILDFLAG(ENABLE_NACL)
switches::kNaClDangerousNoSandboxNonSfi,
#endif
switches::kSingleProcess,
// These flags disable or undermine the Same Origin Policy.
translate::switches::kTranslateSecurityOrigin,
// These flags undermine HTTPS / connection security.
switches::kDisableWebRtcEncryption,
switches::kIgnoreCertificateErrors,
invalidation::switches::kSyncAllowInsecureXmppConnection,
// These flags change the URLs that handle PII.
switches::kGaiaUrl, translate::switches::kTranslateScriptURL,
#if BUILDFLAG(ENABLE_EXTENSIONS)
// This flag gives extensions more powers.
extensions::switches::kExtensionsOnChromeURLs,
#endif
#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
// Speech dispatcher is buggy, it can crash and it can make Chrome freeze.
// http://crbug.com/327295
switches::kEnableSpeechDispatcher,
#endif
// These flags control Blink feature state, which is not supported and is
// intended only for use by Chromium developers.
switches::kDisableBlinkFeatures, switches::kEnableBlinkFeatures,
// This flag allows people to whitelist certain origins as secure, even
// if they are not.
switches::kUnsafelyTreatInsecureOriginAsSecure,
// This flag allows sites to access the camera and microphone without
// getting the user's permission.
switches::kUseFakeUIForMediaStream,
// This flag allows sites to access protected media identifiers without
// getting the user's permission.
switches::kUnsafelyAllowProtectedMediaIdentifierForDomain,
// This flag delays execution of base::TaskPriority::BEST_EFFORT tasks until
// shutdown. The queue of base::TaskPriority::BEST_EFFORT tasks can increase
// memory usage. Also, while it should be possible to use Chrome almost
// normally with this flag, it is expected that some non-visible operations
// such as writing user data to disk, cleaning caches, reporting metrics or
// updating components won't be performed until shutdown.
switches::kDisableBackgroundTasks,
};
#endif // OS_ANDROID
// Dangerous feature flags in about:flags for which to display a warning that
// "stability and security will suffer".
static const base::Feature* kBadFeatureFlagsInAboutFlags[] = {
&features::kSignedHTTPExchange,
#if defined(OS_ANDROID)
&chrome::android::kCommandLineOnNonRooted,
#endif // OS_ANDROID
};
void ShowBadFeatureFlagsInfoBar(content::WebContents* web_contents,
int message_id,
const base::Feature* feature) {
SimpleAlertInfoBarDelegate::Create(
InfoBarService::FromWebContents(web_contents),
infobars::InfoBarDelegate::BAD_FLAGS_INFOBAR_DELEGATE, nullptr,
l10n_util::GetStringFUTF16(message_id, base::UTF8ToUTF16(feature->name)),
false);
}
} // namespace
void ShowBadFlagsPrompt(content::WebContents* web_contents) {
// On Android, ShowBadFlagsPrompt doesn't show the warning notification
// for flags which are not available in about:flags.
#if !defined(OS_ANDROID)
for (const char* flag : kBadFlags) {
if (base::CommandLine::ForCurrentProcess()->HasSwitch(flag)) {
ShowBadFlagsInfoBar(web_contents, IDS_BAD_FLAGS_WARNING_MESSAGE, flag);
return;
}
}
#endif // OS_ANDROID
for (const base::Feature* feature : kBadFeatureFlagsInAboutFlags) {
if (base::FeatureList::IsEnabled(*feature)) {
ShowBadFeatureFlagsInfoBar(web_contents, IDS_BAD_FEATURES_WARNING_MESSAGE,
feature);
return;
}
}
}
void ShowBadFlagsInfoBar(content::WebContents* web_contents,
int message_id,
const char* flag) {
std::string switch_value =
base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(flag);
if (!switch_value.empty())
switch_value = "=" + switch_value;
SimpleAlertInfoBarDelegate::Create(
InfoBarService::FromWebContents(web_contents),
infobars::InfoBarDelegate::BAD_FLAGS_INFOBAR_DELEGATE, nullptr,
l10n_util::GetStringFUTF16(
message_id,
base::UTF8ToUTF16(std::string("--") + flag + switch_value)),
false);
}
void MaybeShowInvalidUserDataDirWarningDialog() {
const base::FilePath& user_data_dir = GetInvalidSpecifiedUserDataDir();
if (user_data_dir.empty())
return;
startup_metric_utils::SetNonBrowserUIDisplayed();
// Ensure the ResourceBundle is initialized for string resource access.
bool cleanup_resource_bundle = false;
if (!ui::ResourceBundle::HasSharedInstance()) {
cleanup_resource_bundle = true;
std::string locale = l10n_util::GetApplicationLocale(std::string());
const char kUserDataDirDialogFallbackLocale[] = "en-US";
if (locale.empty())
locale = kUserDataDirDialogFallbackLocale;
ui::ResourceBundle::InitSharedInstanceWithLocale(
locale, NULL, ui::ResourceBundle::DO_NOT_LOAD_COMMON_RESOURCES);
}
const base::string16& title =
l10n_util::GetStringUTF16(IDS_CANT_WRITE_USER_DIRECTORY_TITLE);
const base::string16& message =
l10n_util::GetStringFUTF16(IDS_CANT_WRITE_USER_DIRECTORY_SUMMARY,
user_data_dir.LossyDisplayName());
if (cleanup_resource_bundle)
ui::ResourceBundle::CleanupSharedInstance();
// More complex dialogs cannot be shown before the earliest calls here.
ShowWarningMessageBox(NULL, title, message);
}
} // namespace chrome
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