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// Copyright 2019 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/permissions/permission_overrides.h"
#include <optional>
#include <utility>
#include "base/containers/contains.h"
#include "base/containers/map_util.h"
#include "base/types/optional_ref.h"
#include "base/types/optional_util.h"
#include "components/content_settings/core/common/content_settings.h"
#include "content/public/browser/permission_result.h"
#include "third_party/abseil-cpp/absl/functional/overload.h"
#include "third_party/blink/public/common/permissions/permission_utils.h"
#include "url/gurl.h"
namespace content {
using PermissionStatus = blink::mojom::PermissionStatus;
PermissionOverrides::PermissionKey::PermissionKey(
base::optional_ref<const url::Origin> requesting_origin,
base::optional_ref<const url::Origin> embedding_origin,
blink::PermissionType type)
: scope_(MakeScopeData(requesting_origin, embedding_origin, type)),
type_(type) {}
PermissionOverrides::PermissionKey::PermissionKey(blink::PermissionType type)
: PermissionKey(std::nullopt, std::nullopt, type) {}
PermissionOverrides::PermissionKey::PermissionScope
PermissionOverrides::PermissionKey::MakeScopeData(
base::optional_ref<const url::Origin> requesting_origin,
base::optional_ref<const url::Origin> embedding_origin,
blink::PermissionType type) {
CHECK_EQ(requesting_origin.has_value(), embedding_origin.has_value());
if (!requesting_origin.has_value()) {
return PermissionOverrides::PermissionKey::GlobalKey();
}
// STORAGE_ACCESS_GRANT has a permission key of type (site, site) tuple as
// defined by the spec:
// https://privacycg.github.io/storage-access/#permissions-integration
// TOP_LEVEL_STORAGE_ACCESS has a permission key of type (origin, site) tuple
// as defined by the spec:
// https://privacycg.github.io/requestStorageAccessFor/#permissions-integration
switch (type) {
case blink::PermissionType::STORAGE_ACCESS_GRANT:
return std::make_pair(net::SchemefulSite(*requesting_origin),
net::SchemefulSite(*embedding_origin));
case blink::PermissionType::TOP_LEVEL_STORAGE_ACCESS:
return std::make_pair(*requesting_origin,
net::SchemefulSite(*embedding_origin));
default:
return *requesting_origin;
}
}
PermissionOverrides::PermissionKey::PermissionKey() = default;
PermissionOverrides::PermissionKey::~PermissionKey() = default;
PermissionOverrides::PermissionKey::PermissionKey(const PermissionKey&) =
default;
PermissionOverrides::PermissionKey&
PermissionOverrides::PermissionKey::operator=(const PermissionKey& other) =
default;
PermissionOverrides::PermissionKey::PermissionKey(PermissionKey&&) = default;
PermissionOverrides::PermissionKey&
PermissionOverrides::PermissionKey::operator=(PermissionKey&& other) = default;
PermissionOverrides::PermissionOverrides() = default;
PermissionOverrides::~PermissionOverrides() = default;
PermissionOverrides::PermissionOverrides(PermissionOverrides&& other) = default;
PermissionOverrides& PermissionOverrides::operator=(
PermissionOverrides&& other) = default;
void PermissionOverrides::Set(
base::optional_ref<const url::Origin> requesting_origin,
base::optional_ref<const url::Origin> embedding_origin,
blink::PermissionType permission,
const blink::mojom::PermissionStatus& status) {
overrides_[PermissionKey(requesting_origin, embedding_origin, permission)] =
status;
// Special override status - MIDI_SYSEX is stronger than MIDI, meaning that
// granting MIDI_SYSEX implies granting MIDI, while denying MIDI implies
// denying MIDI_SYSEX.
if (permission == blink::PermissionType::MIDI &&
status != PermissionStatus::GRANTED) {
overrides_[PermissionKey(requesting_origin, embedding_origin,
blink::PermissionType::MIDI_SYSEX)] = status;
} else if (permission == blink::PermissionType::MIDI_SYSEX &&
status == PermissionStatus::GRANTED) {
overrides_[PermissionKey(requesting_origin, embedding_origin,
blink::PermissionType::MIDI)] = status;
}
}
std::optional<PermissionResult> PermissionOverrides::Get(
const url::Origin& requesting_origin,
const url::Origin& embedding_origin,
blink::PermissionType permission) const {
const auto* status = base::FindOrNull(
overrides_,
PermissionKey(requesting_origin, embedding_origin, permission));
if (!status) {
status = base::FindOrNull(overrides_, PermissionKey(permission));
}
return status ? std::make_optional(PermissionResult(
*status, PermissionStatusSource::UNSPECIFIED))
: std::nullopt;
}
std::vector<ContentSettingPatternSource>
PermissionOverrides::CreateContentSettingsForType(
blink::PermissionType permission_type) const {
std::vector<ContentSettingPatternSource> patterns;
for (const auto& [key, status] : overrides_) {
if (permission_type != key.type()) {
continue;
}
std::optional<ContentSetting> setting;
switch (status) {
case blink::mojom::PermissionStatus::GRANTED:
setting = ContentSetting::CONTENT_SETTING_ALLOW;
break;
case blink::mojom::PermissionStatus::DENIED:
case blink::mojom::PermissionStatus::UNSATISFIED_OPTIONS:
setting = ContentSetting::CONTENT_SETTING_BLOCK;
break;
case blink::mojom::PermissionStatus::ASK:
continue;
}
std::pair<ContentSettingsPattern, ContentSettingsPattern> setting_patterns =
key.CreateContentSettingsPatterns();
patterns.emplace_back(setting_patterns.first, setting_patterns.second,
base::Value(setting.value()),
content_settings::ProviderType::kNone,
/*incognito=*/false);
}
std::ranges::sort(patterns, std::ranges::greater{},
[](const ContentSettingPatternSource& p) {
return std::make_pair(p.primary_pattern,
p.secondary_pattern);
});
return patterns;
}
void PermissionOverrides::GrantPermissions(
base::optional_ref<const url::Origin> requesting_origin,
base::optional_ref<const url::Origin> embedding_origin,
const std::vector<blink::PermissionType>& permissions) {
for (auto type : blink::GetAllPermissionTypes()) {
Set(requesting_origin, embedding_origin, type,
base::Contains(permissions, type) ? PermissionStatus::GRANTED
: PermissionStatus::DENIED);
}
}
std::pair<ContentSettingsPattern, ContentSettingsPattern>
PermissionOverrides::PermissionKey::CreateContentSettingsPatterns() const {
return std::visit(
absl::Overload(
[](const GlobalKey& global_key) {
return std::make_pair(ContentSettingsPattern::Wildcard(),
ContentSettingsPattern::Wildcard());
},
[](const url::Origin& origin) {
return std::make_pair(
ContentSettingsPattern::Wildcard(),
ContentSettingsPattern::FromURLNoWildcard(origin.GetURL()));
},
[](const std::pair<net::SchemefulSite, net::SchemefulSite>& key) {
return std::make_pair(
ContentSettingsPattern::FromURLToSchemefulSitePattern(
key.first.GetURL()),
ContentSettingsPattern::FromURLToSchemefulSitePattern(
key.second.GetURL()));
},
[](const std::pair<url::Origin, net::SchemefulSite>& key) {
return std::make_pair(
ContentSettingsPattern::FromURLNoWildcard(key.first.GetURL()),
ContentSettingsPattern::FromURLToSchemefulSitePattern(
key.second.GetURL()));
}),
scope_);
}
} // namespace content
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