File: privacy_sandbox_settings_impl.cc

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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "components/privacy_sandbox/privacy_sandbox_settings_impl.h"

#include <algorithm>
#include <cstddef>
#include <cstdint>
#include <vector>

#include "base/containers/contains.h"
#include "base/feature_list.h"
#include "base/json/values_util.h"
#include "base/metrics/field_trial_params.h"
#include "base/metrics/histogram_functions.h"
#include "base/observer_list.h"
#include "base/strings/strcat.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/time/time.h"
#include "base/values.h"
#include "components/browsing_topics/common/common_types.h"
#include "components/browsing_topics/common/semantic_tree.h"
#include "components/content_settings/core/browser/cookie_settings.h"
#include "components/content_settings/core/browser/host_content_settings_map.h"
#include "components/content_settings/core/common/pref_names.h"
#include "components/metrics/dwa/dwa_builders.h"
#include "components/metrics/dwa/dwa_recorder.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "components/privacy_sandbox/canonical_topic.h"
#include "components/privacy_sandbox/privacy_sandbox_attestations/privacy_sandbox_attestations.h"
#include "components/privacy_sandbox/privacy_sandbox_features.h"
#include "components/privacy_sandbox/privacy_sandbox_prefs.h"
#include "components/privacy_sandbox/privacy_sandbox_settings.h"
#include "components/privacy_sandbox/tpcd_experiment_eligibility.h"
#include "components/privacy_sandbox/tracking_protection_settings.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/common/content_features.h"
#include "net/base/registry_controlled_domains/registry_controlled_domain.h"
#include "net/base/schemeful_site.h"
#include "net/cookies/site_for_cookies.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/public/mojom/devtools/console_message.mojom.h"
#include "url/gurl.h"
#include "url/origin.h"

namespace privacy_sandbox {

namespace {

using ::content_settings::CookieControlsMode;

constexpr char kBlockedTopicsTopicKey[] = "topic";
constexpr char kBlockedTopicsBlockTimeKey[] = "blockedOn";

constexpr char kIsTopicsAllowedHistogram[] = "PrivacySandbox.IsTopicsAllowed";
constexpr char kIsTopicsAllowedForContextHistogram[] =
    "PrivacySandbox.IsTopicsAllowedForContext";
constexpr char kIsAttributionReportingEverAllowedHistogram[] =
    "PrivacySandbox.IsAttributionReportingEverAllowed";
constexpr char kIsAttributionReportingAllowedHistogram[] =
    "PrivacySandbox.IsAttributionReportingAllowed";
constexpr char kMaySendAttributionReportHistogram[] =
    "PrivacySandbox.MaySendAttributionReport";
constexpr char kIsFledgeJoinAllowedHistogram[] =
    "PrivacySandbox.IsFledgeJoinAllowed";
constexpr char kIsFledgeLeaveAllowedHistogram[] =
    "PrivacySandbox.IsFledgeLeaveAllowed";
constexpr char kIsFledgeUpdateAllowedHistogram[] =
    "PrivacySandbox.IsFledgeUpdateAllowed";
constexpr char kIsFledgeSellAllowedHistogram[] =
    "PrivacySandbox.IsFledgeSellAllowed";
constexpr char kIsFledgeBuyAllowedHistogram[] =
    "PrivacySandbox.IsFledgeBuyAllowed";
constexpr char kIsFledgeReadAllowedHistogram[] =
    "PrivacySandbox.IsFledgeReadAllowed";
constexpr char kIsPrivacySandboxReportingDestinationAttestedHistogram[] =
    "PrivacySandbox.IsPrivacySandboxReportingDestinationAttested";
constexpr char kIsSharedStorageAllowedHistogram[] =
    "PrivacySandbox.IsSharedStorageAllowed";
constexpr char kIsSharedStorageSelectURLAllowedHistogram[] =
    "PrivacySandbox.IsSharedStorageSelectURLAllowed";
constexpr char kIsFencedStorageReadAllowedHistogram[] =
    "PrivacySandbox.IsFencedStorageReadAllowed";
constexpr char kIsPrivateAggregationAllowedHistogram[] =
    "PrivacySandbox.IsPrivateAggregationAllowed";

bool IsCookiesClearOnExitEnabled(HostContentSettingsMap* map) {
  return map->GetDefaultContentSetting(ContentSettingsType::COOKIES) ==
         ContentSetting::CONTENT_SETTING_SESSION_ONLY;
}

// Convert a stored FLEDGE block eTLD+1 into applicable content settings
// patterns. This ensures that if Public Suffix List membership changes, the
// stored item continues to match as when it was set. Multiple patterns are set
// to support IP address fallbacks, which do not support [*.] prefixes.
// TODO (crbug.com/1287153): This is somewhat hacky and can be removed when
// FLEDGE is controlled by a content setting directly.
std::vector<ContentSettingsPattern> FledgeBlockToContentSettingsPatterns(
    const std::string& entry) {
  return {ContentSettingsPattern::FromString("[*.]" + entry),
          ContentSettingsPattern::FromString(entry)};
}

// Returns a base::Value::Dict for storage in prefs that represents |topic|
// blocked at the current time.
base::Value::Dict CreateBlockedTopicEntry(const CanonicalTopic& topic) {
  return base::Value::Dict()
      .Set(kBlockedTopicsTopicKey, topic.ToValue())
      .Set(kBlockedTopicsBlockTimeKey, base::TimeToValue(base::Time::Now()));
}

std::set<browsing_topics::Topic> GetTopicsSetFromString(
    std::string topics_string) {
  if (topics_string.empty()) {
    return {};
  }
  std::set<browsing_topics::Topic> result;
  std::vector<std::string> tokens = base::SplitString(
      topics_string, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
  for (const std::string& token : tokens) {
    int topic_id;
    CHECK(base::StringToInt(token, &topic_id));
    result.emplace(topic_id);
  }
  return result;
}

}  // namespace

// static
bool PrivacySandboxSettingsImpl::IsAllowed(Status status) {
  return false;
}

// static
void PrivacySandboxSettingsImpl::JoinHistogram(const char* name,
                                               Status status) {
  base::UmaHistogramEnumeration(name, status);
}

// static
void PrivacySandboxSettingsImpl::JoinFledgeHistogram(
    content::InterestGroupApiOperation interest_group_api_operation,
    Status status) {
  switch (interest_group_api_operation) {
    case content::InterestGroupApiOperation::kJoin:
      JoinHistogram(kIsFledgeJoinAllowedHistogram, status);
      break;
    case content::InterestGroupApiOperation::kLeave:
      JoinHistogram(kIsFledgeLeaveAllowedHistogram, status);
      break;
    case content::InterestGroupApiOperation::kUpdate:
      JoinHistogram(kIsFledgeUpdateAllowedHistogram, status);
      break;
    case content::InterestGroupApiOperation::kSell:
      JoinHistogram(kIsFledgeSellAllowedHistogram, status);
      break;
    case content::InterestGroupApiOperation::kBuy:
      JoinHistogram(kIsFledgeBuyAllowedHistogram, status);
      break;
    case content::InterestGroupApiOperation::kRead:
      JoinHistogram(kIsFledgeReadAllowedHistogram, status);
      break;
  }
}

PrivacySandboxSettingsImpl::PrivacySandboxSettingsImpl(
    std::unique_ptr<Delegate> delegate,
    HostContentSettingsMap* host_content_settings_map,
    scoped_refptr<content_settings::CookieSettings> cookie_settings,
    TrackingProtectionSettings* tracking_protection_settings,
    PrefService* pref_service)
    : delegate_(std::move(delegate)),
      host_content_settings_map_(host_content_settings_map),
      cookie_settings_(cookie_settings),
      tracking_protection_settings_(tracking_protection_settings),
      pref_service_(pref_service) {
  CHECK(pref_service_);
  CHECK(host_content_settings_map_);
  CHECK(cookie_settings_);
  CHECK(tracking_protection_settings_);
  // "Clear on exit" causes a cookie deletion on shutdown. But for practical
  // purposes, we're notifying the observers on startup (which should be
  // equivalent, as no cookie operations could have happened while the profile
  // was shut down).
  if (IsCookiesClearOnExitEnabled(host_content_settings_map_)) {
    OnCookiesCleared();
  }

  tracking_protection_settings_observation_.Observe(
      tracking_protection_settings_);

  pref_change_registrar_.Init(pref_service_);
  pref_change_registrar_.Add(
      prefs::kPrivacySandboxRelatedWebsiteSetsEnabled,
      base::BindRepeating(
          &PrivacySandboxSettingsImpl::OnRelatedWebsiteSetsEnabledPrefChanged,
          base::Unretained(this)));
}

PrivacySandboxSettingsImpl::~PrivacySandboxSettingsImpl() = default;

void PrivacySandboxSettingsImpl::Shutdown() {
  observers_.Clear();
  delegate_.reset();
  host_content_settings_map_ = nullptr;
  cookie_settings_.reset();
  tracking_protection_settings_ = nullptr;
  pref_service_ = nullptr;
  pref_change_registrar_.Reset();
  tracking_protection_settings_observation_.Reset();
}

PrivacySandboxSettingsImpl::Status
PrivacySandboxSettingsImpl::GetM1TopicAllowedStatus() const {
  auto control_status = GetM1PrivacySandboxApiEnabledStatus(
      prefs::kPrivacySandboxM1TopicsEnabled);
  auto has_appropriate_consent = delegate_->HasAppropriateTopicsConsent();

  // If `control_status` indicates that Topics is allowed, then
  // `has_appropriate_consent` should be true, as there is no pathway for a user
  // to enable Topics controls without also granting consent. The inverse does
  // not hold, as an extension or policy may disable Topics, without necessarily
  // revoking user consent.
  if (control_status == Status::kAllowed && !has_appropriate_consent) {
    // This status will be recorded via UMA, and is indicative of an error.
    return Status::kMismatchedConsent;
  }

  return control_status;
}

const std::set<browsing_topics::Topic>&
PrivacySandboxSettingsImpl::GetFinchDisabledTopics() {
  if (finch_disabled_topics_.size() > 0) {
    return finch_disabled_topics_;
  }
  std::string disabled_topics_string =
      blink::features::kBrowsingTopicsDisabledTopicsList.Get();
  finch_disabled_topics_ = GetTopicsSetFromString(disabled_topics_string);
  return finch_disabled_topics_;
}

const std::set<browsing_topics::Topic>&
PrivacySandboxSettingsImpl::GetFinchPrioritizedTopics() {
  if (finch_prioritized_topics_.size() > 0) {
    return finch_prioritized_topics_;
  }
  std::string prioritized_topics_string =
      blink::features::kBrowsingTopicsPrioritizedTopicsList.Get();
  finch_prioritized_topics_ = GetTopicsSetFromString(prioritized_topics_string);
  return finch_prioritized_topics_;
}

bool PrivacySandboxSettingsImpl::IsTopicsAllowed() const {
  Status status = GetM1TopicAllowedStatus();
  JoinHistogram(kIsTopicsAllowedHistogram, status);
  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::IsTopicsAllowedForContext(
    const url::Origin& top_frame_origin,
    const GURL& url,
    content::RenderFrameHost* console_frame) const {
  // Check for attestation on the calling context's site.
  Status attestation_status =
      PrivacySandboxAttestations::GetInstance()->IsSiteAttested(
          net::SchemefulSite(url), PrivacySandboxAttestationsGatedAPI::kTopics);
  if (!IsAllowed(attestation_status)) {
    JoinHistogram(kIsTopicsAllowedForContextHistogram, attestation_status);
    if (console_frame) {
      console_frame->AddMessageToConsole(
          blink::mojom::ConsoleMessageLevel::kError,
          "Attestation check for Topics on " + url.spec() + " failed.");
    }
    return false;
  }

  Status status = GetM1TopicAllowedStatus();
  if (IsAllowed(status)) {
    status = GetSiteAccessAllowedStatus(top_frame_origin, url);
  }
  JoinHistogram(kIsTopicsAllowedForContextHistogram, status);
  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::IsTopicAllowed(const CanonicalTopic& topic) {
  const auto& blocked_topics =
      pref_service_->GetList(prefs::kPrivacySandboxBlockedTopics);

  std::vector<browsing_topics::Topic> ancestor_topics =
      browsing_topics::SemanticTree().GetAncestorTopics(topic.topic_id());
  for (const base::Value& item : blocked_topics) {
    auto blocked_topic =
        CanonicalTopic::FromValue(*item.GetDict().Find(kBlockedTopicsTopicKey));
    if (!blocked_topic) {
      continue;
    }

    if ((topic.topic_id() == blocked_topic->topic_id()) ||
        (base::Contains(ancestor_topics, blocked_topic->topic_id()))) {
      return false;
    }
  }

  for (browsing_topics::Topic blocked_topic_id : GetFinchDisabledTopics()) {
    if ((topic.topic_id() == blocked_topic_id) ||
        (base::Contains(ancestor_topics, blocked_topic_id))) {
      return false;
    }
  }
  return true;
}

void PrivacySandboxSettingsImpl::SetTopicAllowed(const CanonicalTopic& topic,
                                                 bool allowed) {
  ScopedListPrefUpdate scoped_pref_update(pref_service_,
                                          prefs::kPrivacySandboxBlockedTopics);

  // Presence in the preference list indicates that a topic is blocked, as
  // there is no concept of explicitly allowed topics. Thus, allowing a topic
  // is the same as removing it, if it exists, from the blocklist. Blocking
  // a topic is the same as adding it to the blocklist, but as duplicate entries
  // are undesireable, removing any existing reference first is desireable.
  // Thus, regardless of |allowed|, removing any existing reference is the
  // first step.
  scoped_pref_update->EraseIf([&](const base::Value& value) {
    auto* blocked_topic_value = value.GetDict().Find(kBlockedTopicsTopicKey);
    auto converted_topic = CanonicalTopic::FromValue(*blocked_topic_value);
    return converted_topic && *converted_topic == topic;
  });

  // If the topic is being blocked, it can be (re)added to the blocklist. If the
  // topic was removed from the blocklist above, this is equivalent to updating
  // the modified time associated with the entry to the current time. As data
  // deletions are typically from the current time backwards, this makes it
  // more likely to be removed - a privacy improvement.
  if (!allowed) {
    scoped_pref_update->Append(CreateBlockedTopicEntry(topic));
  }
}

bool PrivacySandboxSettingsImpl::IsTopicPrioritized(
    const CanonicalTopic& topic) {
  const std::set<browsing_topics::Topic>& prioritized_topics =
      GetFinchPrioritizedTopics();
  if (prioritized_topics.contains(topic.topic_id())) {
    return true;
  }
  for (const browsing_topics::Topic& ancestor_topic :
       browsing_topics::SemanticTree().GetAncestorTopics(topic.topic_id())) {
    if (prioritized_topics.contains(ancestor_topic)) {
      return true;
    }
  }
  return false;
}

void PrivacySandboxSettingsImpl::ClearTopicSettings(base::Time start_time,
                                                    base::Time end_time) {
  ScopedListPrefUpdate scoped_pref_update(pref_service_,
                                          prefs::kPrivacySandboxBlockedTopics);

  // Shortcut for maximum time range deletion.
  if (start_time == base::Time() && end_time == base::Time::Max()) {
    scoped_pref_update->clear();
    return;
  }

  scoped_pref_update->EraseIf([&](const base::Value& value) {
    auto blocked_time =
        base::ValueToTime(value.GetDict().Find(kBlockedTopicsBlockTimeKey));
    return start_time <= blocked_time && blocked_time <= end_time;
  });
}

base::Time PrivacySandboxSettingsImpl::TopicsDataAccessibleSince() const {
  return pref_service_->GetTime(
      prefs::kPrivacySandboxTopicsDataAccessibleSince);
}

PrivacySandboxSettingsImpl::Status
PrivacySandboxSettingsImpl::GetM1AdMeasurementAllowedStatus(
    const url::Origin& top_frame_origin,
    const url::Origin& reporting_origin) const {
  Status status = GetM1PrivacySandboxApiEnabledStatus(
      prefs::kPrivacySandboxM1AdMeasurementEnabled);
  if (!IsAllowed(status)) {
    return status;
  }

  return GetSiteAccessAllowedStatus(top_frame_origin,
                                    reporting_origin.GetURL());
}

bool PrivacySandboxSettingsImpl::IsAttributionReportingEverAllowed() const {
  Status status = GetM1PrivacySandboxApiEnabledStatus(
      prefs::kPrivacySandboxM1AdMeasurementEnabled);
  JoinHistogram(kIsAttributionReportingEverAllowedHistogram, status);
  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::IsAttributionReportingAllowed(
    const url::Origin& top_frame_origin,
    const url::Origin& reporting_origin,
    content::RenderFrameHost* console_frame) const {
  // Check for attestation on the reporting origin.
  Status attestation_status =
      PrivacySandboxAttestations::GetInstance()->IsSiteAttested(
          net::SchemefulSite(reporting_origin),
          PrivacySandboxAttestationsGatedAPI::kAttributionReporting);
  if (!IsAllowed(attestation_status)) {
    JoinHistogram(kIsAttributionReportingAllowedHistogram, attestation_status);
    if (console_frame) {
      console_frame->AddMessageToConsole(
          blink::mojom::ConsoleMessageLevel::kError,
          "Attestation check for Attribution Reporting on " +
              reporting_origin.Serialize() + " failed.");
    }
    dwa::builders::PrivacySandbox_IsAttributionReportingAllowed()
        .SetContent(reporting_origin.Serialize())
        .SetStatus(static_cast<int64_t>(attestation_status))
        .Record(metrics::dwa::DwaRecorder::Get());
    return false;
  }

  Status status =
      GetM1AdMeasurementAllowedStatus(top_frame_origin, reporting_origin);
  JoinHistogram(kIsAttributionReportingAllowedHistogram, status);
  dwa::builders::PrivacySandbox_IsAttributionReportingAllowed()
      .SetContent(reporting_origin.Serialize())
      .SetStatus(static_cast<int64_t>(status))
      .Record(metrics::dwa::DwaRecorder::Get());
  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::MaySendAttributionReport(
    const url::Origin& source_origin,
    const url::Origin& destination_origin,
    const url::Origin& reporting_origin,
    content::RenderFrameHost* console_frame) const {
  // Check for attestation on the reporting origin.
  Status attestation_status =
      PrivacySandboxAttestations::GetInstance()->IsSiteAttested(
          net::SchemefulSite(reporting_origin),
          PrivacySandboxAttestationsGatedAPI::kAttributionReporting,
          AttestationsDefaultBehavior::kAllow);
  if (!IsAllowed(attestation_status)) {
    JoinHistogram(kMaySendAttributionReportHistogram, attestation_status);
    if (console_frame) {
      console_frame->AddMessageToConsole(
          blink::mojom::ConsoleMessageLevel::kError,
          "Attestation check for Attribution Reporting on " +
              reporting_origin.Serialize() + " failed.");
    }
    return false;
  }

  Status status = GetM1AdMeasurementAllowedStatus(
      /*top_frame_origin=*/source_origin,
      /*reporting_origin=*/reporting_origin);
  if (IsAllowed(status)) {
    status = GetM1AdMeasurementAllowedStatus(
        /*top_frame_origin=*/destination_origin,
        /*reporting_origin=*/reporting_origin);
  }
  JoinHistogram(kMaySendAttributionReportHistogram, status);
  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::
    IsAttributionReportingTransitionalDebuggingAllowed(
        const url::Origin& top_frame_origin,
        const url::Origin& reporting_origin,
        bool& can_bypass) const {
  content_settings::CookieSettingsBase::CookieSettingWithMetadata
      cookie_setting_with_metadata;
  // With what is available here, we can create a cookie_partition_key for the
  // given top_frame_origin and we can assume the ancestor chain bit is
  // cross_site since the `IsFullCookieAccessAllowed` call below uses a null
  // `SiteForCookies`, which means that we will always be in a cross site
  // context.
  net::SchemefulSite top_frame_site(top_frame_origin);
  std::optional<net::CookiePartitionKey> cookie_partition_key =
      net::CookiePartitionKey::FromStorageKeyComponents(
          top_frame_site,
          net::CookiePartitionKey::BoolToAncestorChainBit(/*cross_site=*/true),
          /*nonce=*/std::nullopt);

  // Third party cookies must also be available for this context. An empty site
  // for cookies is provided so the context is always treated as a third party.
  bool allowed = cookie_settings_->IsFullCookieAccessAllowed(
      reporting_origin.GetURL(), net::SiteForCookies(), top_frame_origin,
      net::CookieSettingOverrides(), cookie_partition_key,
      &cookie_setting_with_metadata);

  if (base::FeatureList::IsEnabled(
          kAttributionDebugReportingCookieDeprecationTesting)) {
    can_bypass =
        cookie_setting_with_metadata.BlockedByThirdPartyCookieBlocking() &&
        delegate_->AreThirdPartyCookiesBlockedByCookieDeprecationExperiment();
  } else {
    can_bypass = false;
  }
  return allowed;
}

void PrivacySandboxSettingsImpl::SetFledgeJoiningAllowed(
    const std::string& top_frame_etld_plus1,
    bool allowed) {
  ScopedDictPrefUpdate scoped_pref_update(
      pref_service_, prefs::kPrivacySandboxFledgeJoinBlocked);

  // Ensure that the provided etld_plus1 actually is an etld+1.
  auto effective_top_frame_etld_plus1 =
      net::registry_controlled_domains::GetDomainAndRegistry(
          top_frame_etld_plus1,
          net::registry_controlled_domains::INCLUDE_PRIVATE_REGISTRIES);

  // Hosts are also accepted as a fallback. This may occur if the private
  // registry has changed, and what the caller may be assuming is an eTLD+1 no
  // longer is. Simply ignoring non-eTLD+1's may thus result in unexpected
  // access.
  if (effective_top_frame_etld_plus1 != top_frame_etld_plus1) {
    // Add a dummy scheme and use GURL to confirm the provided string is a valid
    // host.
    const GURL url("https://" + top_frame_etld_plus1);
    effective_top_frame_etld_plus1 = url.host();
  }

  // Ignore attempts to configure an empty etld+1. This will also catch the
  // case where the eTLD+1 was not even a host, as GURL will have canonicalised
  // it to empty.
  if (effective_top_frame_etld_plus1.length() == 0) {
    NOTREACHED() << "Cannot control FLEDGE joining for empty eTLD+1";
  }

  if (allowed) {
    // Existence of the key implies blocking, so simply removing the key is
    // sufficient. If the key wasn't already present, the following is a no-op.
    scoped_pref_update->Remove(effective_top_frame_etld_plus1);
  } else {
    // Overriding the creation date for keys which already exist is acceptable.
    // Time range based deletions are typically started from the current time,
    // and so this will be more aggressively removed. This decreases the chance
    // a potentially sensitive website remains in preferences.
    scoped_pref_update->Set(effective_top_frame_etld_plus1,
                            base::TimeToValue(base::Time::Now()));
  }
}

void PrivacySandboxSettingsImpl::ClearFledgeJoiningAllowedSettings(
    base::Time start_time,
    base::Time end_time) {
  ScopedDictPrefUpdate scoped_pref_update(
      pref_service_, prefs::kPrivacySandboxFledgeJoinBlocked);
  auto& pref_data = scoped_pref_update.Get();

  // Shortcut for maximum time range deletion
  if (start_time == base::Time() && end_time == base::Time::Max()) {
    pref_data.clear();
    return;
  }

  std::vector<std::string> keys_to_remove;
  for (auto entry : pref_data) {
    std::optional<base::Time> created_time = base::ValueToTime(entry.second);
    if (created_time.has_value() && start_time <= created_time &&
        created_time <= end_time) {
      keys_to_remove.push_back(entry.first);
    }
  }

  for (const auto& key : keys_to_remove) {
    pref_data.Remove(key);
  }
}

bool PrivacySandboxSettingsImpl::IsFledgeJoiningAllowed(
    const url::Origin& top_frame_origin) const {
  ScopedDictPrefUpdate scoped_pref_update(
      pref_service_, prefs::kPrivacySandboxFledgeJoinBlocked);
  auto& pref_data = scoped_pref_update.Get();
  for (auto entry : pref_data) {
    if (std::ranges::any_of(FledgeBlockToContentSettingsPatterns(entry.first),
                            [&](const auto& pattern) {
                              return pattern.Matches(top_frame_origin.GetURL());
                            })) {
      return false;
    }
  }
  return true;
}

PrivacySandboxSettingsImpl::Status
PrivacySandboxSettingsImpl::GetM1FledgeAllowedStatus(
    const url::Origin& top_frame_origin,
    const url::Origin& auction_party) const {
  Status status = GetM1PrivacySandboxApiEnabledStatus(
      prefs::kPrivacySandboxM1FledgeEnabled);
  if (!IsAllowed(status)) {
    return status;
  }

  return GetSiteAccessAllowedStatus(top_frame_origin, auction_party.GetURL());
}

PrivacySandboxSettingsImpl::Status
PrivacySandboxSettingsImpl::GetFencedStorageReadEnabledStatus() const {
  // User has turned on the setting to block all third party cookies.
  if (cookie_settings_->ShouldBlockThirdPartyCookies() &&
      !cookie_settings_->AreThirdPartyCookiesLimited()) {
    return Status::kApisDisabled;
  }

  // This feature is default enabled when 3PCs are not blocked.
  return Status::kAllowed;
}

bool PrivacySandboxSettingsImpl::IsEventReportingDestinationAttested(
    const url::Origin& destination_origin,
    privacy_sandbox::PrivacySandboxAttestationsGatedAPI invoking_api) const {
  // Check for attestation on the event recipient's site with whichever API
  // created the frame that invoked the event reporting.
  Status attestation_status =
      PrivacySandboxAttestations::GetInstance()->IsSiteAttested(
          net::SchemefulSite(destination_origin), invoking_api);
  JoinHistogram(kIsPrivacySandboxReportingDestinationAttestedHistogram,
                attestation_status);
  return IsAllowed(attestation_status);
}

bool PrivacySandboxSettingsImpl::IsFledgeAllowed(
    const url::Origin& top_frame_origin,
    const url::Origin& auction_party,
    content::InterestGroupApiOperation interest_group_api_operation,
    content::RenderFrameHost* console_frame) const {
  // Check for attestation on the auction party's site. The auction party is a
  // variety of entities during the auction, all of which need to be attested.
  Status attestation_status =
      PrivacySandboxAttestations::GetInstance()->IsSiteAttested(
          net::SchemefulSite(auction_party),
          PrivacySandboxAttestationsGatedAPI::kProtectedAudience);
  if (!IsAllowed(attestation_status)) {
    JoinFledgeHistogram(interest_group_api_operation, attestation_status);
    if (console_frame) {
      console_frame->AddMessageToConsole(
          blink::mojom::ConsoleMessageLevel::kError,
          "Attestation check for Protected Audience on " +
              auction_party.Serialize() + " failed.");
    }
    return false;
  }

  if (interest_group_api_operation ==
          content::InterestGroupApiOperation::kJoin &&
      !IsFledgeJoiningAllowed(top_frame_origin)) {
    JoinFledgeHistogram(interest_group_api_operation,
                        Status::kJoiningTopFrameBlocked);
    return false;
  }

  Status status = GetM1FledgeAllowedStatus(top_frame_origin, auction_party);
  JoinFledgeHistogram(interest_group_api_operation, status);
  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::IsSharedStorageAllowed(
    const url::Origin& top_frame_origin,
    const url::Origin& accessing_origin,
    std::string* out_debug_message,
    content::RenderFrameHost* console_frame,
    bool* out_block_is_site_setting_specific) const {
  // Check for attestation on the caller's site.
  Status attestation_status =
      PrivacySandboxAttestations::GetInstance()->IsSiteAttested(
          net::SchemefulSite(accessing_origin),
          PrivacySandboxAttestationsGatedAPI::kSharedStorage);
  SetOutBlockIsSiteSettingSpecificFromStatus(
      attestation_status, out_block_is_site_setting_specific);
  if (!IsAllowed(attestation_status)) {
    JoinHistogram(kIsSharedStorageAllowedHistogram, attestation_status);
    std::string error_message =
        base::StrCat({"Attestation check for Shared Storage on ",
                      accessing_origin.Serialize(), " failed."});
    if (out_debug_message) {
      *out_debug_message = base::StrCat(
          {error_message, "\nReturned status ",
           base::NumberToString(int(attestation_status)),
           "; see `PrivacySandboxSettingsImpl::Status` at ",
           "https://chromium.googlesource.com/chromium/src/+/refs/heads/main/",
           "components/privacy_sandbox/privacy_sandbox_settings_impl.h."});
    }
    if (console_frame) {
      console_frame->AddMessageToConsole(
          blink::mojom::ConsoleMessageLevel::kError, error_message);
    }
    return false;
  }

  Status status = GetPrivacySandboxAllowedStatus();
  SetOutBlockIsSiteSettingSpecificFromStatus(
      status, out_block_is_site_setting_specific);
  if (IsAllowed(status)) {
    status =
        GetSiteAccessAllowedStatus(top_frame_origin, accessing_origin.GetURL());
    SetOutBlockIsSiteSettingSpecificFromStatus(
        status, out_block_is_site_setting_specific);
    if (out_debug_message) {
      *out_debug_message = base::StrCat(
          {"Site access settings returned status ",
           base::NumberToString(int(status)), " for accessing origin ",
           accessing_origin.Serialize(), " and top-frame origin ",
           top_frame_origin.Serialize(),
           "; see `PrivacySandboxSettingsImpl::Status` at ",
           "https://chromium.googlesource.com/chromium/src/+/refs/heads/main/",
           "components/privacy_sandbox/privacy_sandbox_settings_impl.h."});
    }
  } else if (out_debug_message) {
    *out_debug_message = base::StrCat(
        {"Privacy Sandbox settings returned status ",
         base::NumberToString(int(status)),
         "; see `PrivacySandboxSettingsImpl::Status` at ",
         "https://chromium.googlesource.com/chromium/src/+/refs/heads/main/",
         "components/privacy_sandbox/privacy_sandbox_settings_impl.h."});
  }
  JoinHistogram(kIsSharedStorageAllowedHistogram, status);
  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::IsSharedStorageSelectURLAllowed(
    const url::Origin& top_frame_origin,
    const url::Origin& accessing_origin,
    std::string* out_debug_message,
    bool* out_block_is_site_setting_specific) const {
  Status status = GetM1FledgeAllowedStatus(top_frame_origin, accessing_origin);
  SetOutBlockIsSiteSettingSpecificFromStatus(
      status, out_block_is_site_setting_specific);
  JoinHistogram(kIsSharedStorageSelectURLAllowedHistogram, status);
  if (out_debug_message) {
    *out_debug_message = base::StrCat(
        {"M1 measurement settings returned status ",
         base::NumberToString(int(status)), " for accessing origin ",
         accessing_origin.Serialize(), " and top-frame origin ",
         top_frame_origin.Serialize(),
         "; see `PrivacySandboxSettingsImpl::Status` at ",
         "https://chromium.googlesource.com/chromium/src/+/refs/heads/main/",
         "components/privacy_sandbox/privacy_sandbox_settings_impl.h."});
  }
  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::IsFencedStorageReadAllowed(
    const url::Origin& top_frame_origin,
    const url::Origin& accessing_origin,
    content::RenderFrameHost* console_frame) const {
  if (Status status = GetFencedStorageReadEnabledStatus(); !IsAllowed(status)) {
    JoinHistogram(kIsFencedStorageReadAllowedHistogram, status);
    if (console_frame) {
      console_frame->AddMessageToConsole(
          blink::mojom::ConsoleMessageLevel::kError,
          "Fenced storage read is disabled because all third-party cookies are "
          "blocked.");
    }
    return false;
  }

  Status attestation_status =
      PrivacySandboxAttestations::GetInstance()->IsSiteAttested(
          net::SchemefulSite(accessing_origin),
          PrivacySandboxAttestationsGatedAPI::kFencedStorageRead);
  if (!IsAllowed(attestation_status)) {
    JoinHistogram(kIsFencedStorageReadAllowedHistogram, attestation_status);
    if (console_frame) {
      console_frame->AddMessageToConsole(
          blink::mojom::ConsoleMessageLevel::kError,
          base::StrCat({"Attestation check for fenced storage read on ",
                        accessing_origin.Serialize(), " failed."}));
    }
    return false;
  }

  Status status = GetPrivacySandboxAllowedStatus();
  if (IsAllowed(status)) {
    status =
        GetSiteAccessAllowedStatus(top_frame_origin, accessing_origin.GetURL());
  }
  JoinHistogram(kIsFencedStorageReadAllowedHistogram, status);

  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::IsPrivateAggregationAllowed(
    const url::Origin& top_frame_origin,
    const url::Origin& reporting_origin,
    bool* out_block_is_site_setting_specific) const {
  // Check for attestation on the worklet's site.
  Status attestation_status =
      PrivacySandboxAttestations::GetInstance()->IsSiteAttested(
          net::SchemefulSite(reporting_origin),
          PrivacySandboxAttestationsGatedAPI::kPrivateAggregation);
  SetOutBlockIsSiteSettingSpecificFromStatus(
      attestation_status, out_block_is_site_setting_specific);
  if (!IsAllowed(attestation_status)) {
    JoinHistogram(kIsPrivateAggregationAllowedHistogram, attestation_status);
    dwa::builders::PrivacySandbox_IsPrivateAggregationAllowed()
        .SetContent(reporting_origin.Serialize())
        .SetStatus(static_cast<int64_t>(attestation_status))
        .Record(metrics::dwa::DwaRecorder::Get());
    return false;
  }

  Status status =
      GetM1AdMeasurementAllowedStatus(top_frame_origin, reporting_origin);
  SetOutBlockIsSiteSettingSpecificFromStatus(
      status, out_block_is_site_setting_specific);
  JoinHistogram(kIsPrivateAggregationAllowedHistogram, status);
  dwa::builders::PrivacySandbox_IsPrivateAggregationAllowed()
      .SetContent(reporting_origin.Serialize())
      .SetStatus(static_cast<int64_t>(status))
      .Record(metrics::dwa::DwaRecorder::Get());
  return IsAllowed(status);
}

bool PrivacySandboxSettingsImpl::IsPrivateAggregationDebugModeAllowed(
    const url::Origin& top_frame_origin,
    const url::Origin& reporting_origin) const {
  if (!IsPrivateAggregationAllowed(
          top_frame_origin, reporting_origin,
          /*out_block_is_site_setting_specific=*/nullptr)) {
    return false;
  }

  // If this feature is disabled, provide a top-frame origin anyway to match
  // previous behavior.
  std::optional<url::Origin> top_frame_origin_to_query;
  if (!base::FeatureList::IsEnabled(
          kPrivateAggregationDebugReportingIgnoreSiteExceptions)) {
    top_frame_origin_to_query = top_frame_origin;
  }
  // With what is available here, we can create a cookie_partition_key for the
  // given top_frame_origin and we can assume the ancestor chain bit is
  // cross_site since the `IsFullCookieAccessAllowed` call below uses a null
  // `SiteForCookies`, which means that we will always be in a cross site
  // context.
  net::SchemefulSite top_frame_site(top_frame_origin);
  std::optional<net::CookiePartitionKey> cookie_partition_key =
      net::CookiePartitionKey::FromStorageKeyComponents(
          top_frame_site,
          net::CookiePartitionKey::BoolToAncestorChainBit(/*cross_site=*/true),
          /*nonce=*/std::nullopt);

  // Third party cookies must also be available for this context. An empty site
  // for cookies and empty top-frame origin is provided so the context is always
  // treated as a third party. That is, we ignore any top-level site cookie
  // exceptions (see crbug.com/364318217).
  content_settings::CookieSettingsBase::CookieSettingWithMetadata
      cookie_setting_with_metadata;
  if (cookie_settings_->IsFullCookieAccessAllowed(
          reporting_origin.GetURL(), net::SiteForCookies(),
          top_frame_origin_to_query, net::CookieSettingOverrides(),
          cookie_partition_key, &cookie_setting_with_metadata)) {
    return true;
  }

  // Third-party cookie access is disabled, but we may still allow Private
  // Aggregation's debug mode in this context if it was only blocked due to the
  // 3PCD experiment.
  return base::FeatureList::IsEnabled(
             kPrivateAggregationDebugReportingCookieDeprecationTesting) &&
         cookie_setting_with_metadata.BlockedByThirdPartyCookieBlocking() &&
         delegate_->AreThirdPartyCookiesBlockedByCookieDeprecationExperiment();
}

void PrivacySandboxSettingsImpl::SetAllPrivacySandboxAllowedForTesting() {
  pref_service_->SetBoolean(prefs::kPrivacySandboxM1FledgeEnabled, true);
  pref_service_->SetBoolean(prefs::kPrivacySandboxM1TopicsEnabled, true);
  pref_service_->SetBoolean(prefs::kPrivacySandboxM1AdMeasurementEnabled, true);
}

void PrivacySandboxSettingsImpl::SetTopicsBlockedForTesting() {
  pref_service_->SetBoolean(prefs::kPrivacySandboxM1TopicsEnabled, false);
}

bool PrivacySandboxSettingsImpl::IsPrivacySandboxRestricted() const {
  return true;
}

bool PrivacySandboxSettingsImpl::IsPrivacySandboxCurrentlyUnrestricted() const {
  return delegate_->IsPrivacySandboxCurrentlyUnrestricted();
}

bool PrivacySandboxSettingsImpl::IsSubjectToM1NoticeRestricted() const {
  return delegate_->IsSubjectToM1NoticeRestricted();
}

bool PrivacySandboxSettingsImpl::IsRestrictedNoticeEnabled() const {
  return delegate_->IsRestrictedNoticeEnabled();
}

void PrivacySandboxSettingsImpl::OnCookiesCleared() {
  SetTopicsDataAccessibleFromNow();
}

void PrivacySandboxSettingsImpl::OnRelatedWebsiteSetsEnabledPrefChanged() {
  for (auto& observer : observers_) {
    observer.OnRelatedWebsiteSetsEnabledChanged(AreRelatedWebsiteSetsEnabled());
  }
}

void PrivacySandboxSettingsImpl::AddObserver(Observer* observer) {
  observers_.AddObserver(observer);
}

void PrivacySandboxSettingsImpl::RemoveObserver(Observer* observer) {
  observers_.RemoveObserver(observer);
}

void PrivacySandboxSettingsImpl::SetDelegateForTesting(
    std::unique_ptr<Delegate> delegate) {
  delegate_ = std::move(delegate);
}

void PrivacySandboxSettingsImpl::SetTopicsDataAccessibleFromNow() const {
  pref_service_->SetTime(prefs::kPrivacySandboxTopicsDataAccessibleSince,
                         base::Time::Now());

  for (auto& observer : observers_) {
    observer.OnTopicsDataAccessibleSinceUpdated();
  }
}

PrivacySandboxSettingsImpl::Status
PrivacySandboxSettingsImpl::GetSiteAccessAllowedStatus(
    const url::Origin& top_frame_origin,
    const GURL& url) const {
  // Relying on |host_content_settings_map_| instead of |cookie_settings_|
  // allows to query whether the site associated with the |url| is allowed to
  // access Site data (aka ContentSettingsType::COOKIES) without considering any
  // 3P cookie blocking setting.
  return content_settings::CookieSettingsBase::IsAllowed(
             host_content_settings_map_->GetContentSetting(
                 url, top_frame_origin.GetURL(), ContentSettingsType::COOKIES))
             ? Status::kAllowed
             : Status::kSiteDataAccessBlocked;
}

PrivacySandboxSettingsImpl::Status
PrivacySandboxSettingsImpl::GetPrivacySandboxAllowedStatus(
    bool should_ignore_restriction /*=false*/) const {
  if (delegate_->IsIncognitoProfile()) {
    return Status::kIncognitoProfile;
  }

    return Status::kRestricted;
}

PrivacySandboxSettingsImpl::Status
PrivacySandboxSettingsImpl::GetM1PrivacySandboxApiEnabledStatus(
    const std::string& pref_name) const {
  DCHECK(pref_name == prefs::kPrivacySandboxM1TopicsEnabled ||
         pref_name == prefs::kPrivacySandboxM1FledgeEnabled ||
         pref_name == prefs::kPrivacySandboxM1AdMeasurementEnabled);
  if (delegate_->IsCookieDeprecationExperimentEligible() &&
      features::kCookieDeprecationTestingDisableAdsAPIs.Get()) {
    return Status::kBlockedBy3pcdExperiment;
  }

  bool should_ignore_restriction =
      pref_name == prefs::kPrivacySandboxM1AdMeasurementEnabled &&
      IsRestrictedNoticeEnabled();
  PrivacySandboxSettingsImpl::Status status =
      GetPrivacySandboxAllowedStatus(should_ignore_restriction);
  if (!IsAllowed(status)) {
    return status;
  }

  // For Measurement and Relevance APIs, we explicitly do not require the
  // underlying pref to be enabled if there is a local flag enabling the APIs to
  // allow for local testing.
  if (base::FeatureList::IsEnabled(
          privacy_sandbox::kOverridePrivacySandboxSettingsLocalTesting)) {
    return Status::kAllowed;
  }

  status = (pref_service_->GetBoolean(pref_name)) ? Status::kAllowed
                                                  : Status::kApisDisabled;
  return status;
}

TpcdExperimentEligibility
PrivacySandboxSettingsImpl::GetCookieDeprecationExperimentCurrentEligibility()
    const {
  return delegate_->GetCookieDeprecationExperimentCurrentEligibility();
}

bool PrivacySandboxSettingsImpl::IsCookieDeprecationLabelAllowed() const {
  return delegate_->IsCookieDeprecationLabelAllowed();
}

bool PrivacySandboxSettingsImpl::IsCookieDeprecationLabelAllowedForContext(
    const url::Origin& top_frame_origin,
    const url::Origin& context_origin) const {
  if (!IsCookieDeprecationLabelAllowed()) {
    return false;
  }

  return IsAllowed(
      GetSiteAccessAllowedStatus(top_frame_origin, context_origin.GetURL()));
}

void PrivacySandboxSettingsImpl::OnBlockAllThirdPartyCookiesChanged() {
  for (auto& observer : observers_) {
    observer.OnRelatedWebsiteSetsEnabledChanged(AreRelatedWebsiteSetsEnabled());
  }
}

bool PrivacySandboxSettingsImpl::AreRelatedWebsiteSetsEnabled() const {
  if (tracking_protection_settings_->IsTrackingProtection3pcdEnabled()) {
    return cookie_settings_->AreThirdPartyCookiesLimited();
  }
  return pref_service_->GetBoolean(
      prefs::kPrivacySandboxRelatedWebsiteSetsEnabled);
}

void PrivacySandboxSettingsImpl::SetOutBlockIsSiteSettingSpecificFromStatus(
    Status status,
    bool* out_block_is_site_setting_specific) const {
  if (out_block_is_site_setting_specific != nullptr) {
    *out_block_is_site_setting_specific =
        status == Status::kSiteDataAccessBlocked;
  }
}

}  // namespace privacy_sandbox