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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ssl/generated_https_first_mode_pref.h"
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/metrics/histogram_functions.h"
#include "chrome/browser/extensions/api/settings_private/generated_pref.h"
#include "chrome/browser/extensions/api/settings_private/prefs_util_enums.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/safe_browsing/advanced_protection_status_manager.h"
#include "chrome/browser/safe_browsing/advanced_protection_status_manager_factory.h"
#include "chrome/browser/ssl/https_first_mode_settings_tracker.h"
#include "chrome/browser/ssl/https_upgrades_util.h"
#include "chrome/common/chrome_features.h"
#include "chrome/common/extensions/api/settings_private.h"
#include "chrome/common/pref_names.h"
#include "components/prefs/pref_service.h"
namespace settings_api = extensions::api::settings_private;
const char kGeneratedHttpsFirstModePref[] =
"generated.https_first_mode_enabled";
GeneratedHttpsFirstModePref::GeneratedHttpsFirstModePref(Profile* profile)
: profile_(profile) {
user_prefs_registrar_.Init(profile->GetPrefs());
user_prefs_registrar_.Add(
prefs::kHttpsOnlyModeEnabled,
base::BindRepeating(
&GeneratedHttpsFirstModePref::OnSourcePreferencesChanged,
base::Unretained(this)));
user_prefs_registrar_.Add(
prefs::kHttpsFirstBalancedMode,
base::BindRepeating(
&GeneratedHttpsFirstModePref::OnSourcePreferencesChanged,
base::Unretained(this)));
// Track Advanced Protection status.
if (base::FeatureList::IsEnabled(
features::kHttpsFirstModeForAdvancedProtectionUsers)) {
obs_.Observe(
safe_browsing::AdvancedProtectionStatusManagerFactory::GetForProfile(
profile_));
// On startup, AdvancedProtectionStatusManager runs before this class so we
// don't get called back. Run the callback to get the AP setting.
OnAdvancedProtectionStatusChanged(
safe_browsing::AdvancedProtectionStatusManagerFactory::GetForProfile(
profile_)
->IsUnderAdvancedProtection());
}
}
GeneratedHttpsFirstModePref::~GeneratedHttpsFirstModePref() = default;
void GeneratedHttpsFirstModePref::OnSourcePreferencesChanged() {
NotifyObservers(kGeneratedHttpsFirstModePref);
}
void GeneratedHttpsFirstModePref::OnAdvancedProtectionStatusChanged(
bool enabled) {
DCHECK(base::FeatureList::IsEnabled(
features::kHttpsFirstModeForAdvancedProtectionUsers));
NotifyObservers(kGeneratedHttpsFirstModePref);
}
// Convert the setting selection into values for the two underlying boolean
// prefs.
extensions::settings_private::SetPrefResult
GeneratedHttpsFirstModePref::SetPref(const base::Value* value) {
if (!value->is_int()) {
return extensions::settings_private::SetPrefResult::PREF_TYPE_MISMATCH;
}
auto selection = static_cast<HttpsFirstModeSetting>(value->GetInt());
// If the enterprise policy is enforced, then the kHttpsOnlyModeEnabled pref
// will not be modifiable (for all policy values).
const PrefService::Preference* fully_enabled_pref =
profile_->GetPrefs()->FindPreference(prefs::kHttpsOnlyModeEnabled);
if (!fully_enabled_pref->IsUserModifiable()) {
return extensions::settings_private::SetPrefResult::PREF_NOT_MODIFIABLE;
}
// Update both HTTPS-First Mode preferences to match the selection.
HttpsFirstModeService* hfm_service =
HttpsFirstModeServiceFactory::GetForProfile(profile_);
bool success = hfm_service->UpdatePrefs(selection);
if (!success) {
return extensions::settings_private::SetPrefResult::PREF_TYPE_MISMATCH;
}
return extensions::settings_private::SetPrefResult::SUCCESS;
}
// Convert the underlying boolean prefs into the setting selection.
settings_api::PrefObject GeneratedHttpsFirstModePref::GetPrefObject() const {
bool is_advanced_protection_enabled =
safe_browsing::AdvancedProtectionStatusManagerFactory::GetForProfile(
profile_)
->IsUnderAdvancedProtection();
auto* hfm_fully_enabled_pref =
profile_->GetPrefs()->FindPreference(prefs::kHttpsOnlyModeEnabled);
bool fully_enabled = hfm_fully_enabled_pref->GetValue()->GetBool() ||
is_advanced_protection_enabled;
// Balanced Mode can be enabled by the user or automatically. In both cases,
// the UI setting should look the same.
bool balanced_enabled = IsBalancedModeEnabled(profile_->GetPrefs());
settings_api::PrefObject pref_object;
pref_object.key = kGeneratedHttpsFirstModePref;
pref_object.type = settings_api::PrefType::kNumber;
// Map the two boolean prefs to the enum setting states.
if (fully_enabled) {
pref_object.value =
base::Value(static_cast<int>(HttpsFirstModeSetting::kEnabledFull));
} else if (balanced_enabled) {
pref_object.value =
base::Value(static_cast<int>(HttpsFirstModeSetting::kEnabledBalanced));
} else {
pref_object.value =
base::Value(static_cast<int>(HttpsFirstModeSetting::kDisabled));
}
pref_object.user_control_disabled = is_advanced_protection_enabled;
if (IsBalancedModeAvailable()) {
ApplyManagementState(*profile_, pref_object);
} else {
// TODO(crbug.com/349860796): Remove old settings path once Balanced Mode
// is fully launched.
if (!hfm_fully_enabled_pref->IsUserModifiable()) {
// The pref was controlled by the enterprise policy.
pref_object.enforcement = settings_api::Enforcement::kEnforced;
extensions::settings_private::GeneratedPref::ApplyControlledByFromPref(
&pref_object, hfm_fully_enabled_pref);
} else if (hfm_fully_enabled_pref->GetRecommendedValue()) {
// Policy can set a recommended setting of fully enabled or fully
// disabled. Map those to the enum values.
pref_object.enforcement = settings_api::Enforcement::kRecommended;
if (hfm_fully_enabled_pref->GetRecommendedValue()->GetBool()) {
pref_object.recommended_value =
base::Value(static_cast<int>(HttpsFirstModeSetting::kEnabledFull));
} else {
pref_object.recommended_value =
base::Value(static_cast<int>(HttpsFirstModeSetting::kDisabled));
}
}
}
return pref_object;
}
// static
void GeneratedHttpsFirstModePref::ApplyManagementState(
const Profile& profile,
settings_api::PrefObject& pref_object) {
// Computing the effective HTTPS-First Mode managed state requires inspecting
// both underlying preferences. Note that `prefs::kHttpsOnlyModeEnabled` will
// always be marked as enforced or recommended if any policy state is set, so
// can be treated as the canonical source for whether policy enforcement is
// present.
// Check fully enabled pref enforced and recommended state.
const PrefService::Preference* fully_enabled_pref =
profile.GetPrefs()->FindPreference(prefs::kHttpsOnlyModeEnabled);
const bool fully_enabled_enforced = !fully_enabled_pref->IsUserModifiable();
const bool fully_enabled_recommended =
fully_enabled_pref && fully_enabled_pref->GetRecommendedValue();
const bool fully_enabled_recommended_on =
fully_enabled_recommended &&
fully_enabled_pref->GetRecommendedValue()->GetBool();
// Check the recommended state of the balanced mode pref.
const PrefService::Preference* balanced_pref =
profile.GetPrefs()->FindPreference(prefs::kHttpsFirstBalancedMode);
const bool balanced_recommended_on =
balanced_pref && balanced_pref->GetRecommendedValue() &&
balanced_pref->GetRecommendedValue()->GetBool();
if (!fully_enabled_enforced && !fully_enabled_recommended) {
// No relevant policy is applied.
return;
}
// If policy is enforcing a setting, then the fully enabled pref will be
// enforced, so this covers all policy enforcement states.
if (fully_enabled_enforced) {
pref_object.enforcement = settings_api::Enforcement::kEnforced;
extensions::settings_private::GeneratedPref::ApplyControlledByFromPref(
&pref_object, fully_enabled_pref);
return;
}
// If the policy is recommending a setting, then the fully enabled pref will
// be recommended, so this covers all policy enforcement states.
if (fully_enabled_recommended) {
// Set enforcement to recommended.
pref_object.enforcement = settings_api::Enforcement::kRecommended;
// Determine what setting value is being recommended.
if (fully_enabled_recommended_on) {
pref_object.recommended_value =
base::Value(static_cast<int>(HttpsFirstModeSetting::kEnabledFull));
} else if (balanced_recommended_on) {
pref_object.recommended_value = base::Value(
static_cast<int>(HttpsFirstModeSetting::kEnabledBalanced));
} else {
pref_object.recommended_value =
base::Value(static_cast<int>(HttpsFirstModeSetting::kDisabled));
}
}
}
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