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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/browser/extension_navigation_registry.h"
#include <cstdint>
#include <optional>
#include "base/feature_list.h"
#include "extensions/browser/browser_context_keyed_api_factory.h"
#include "extensions/common/extension_features.h"
#include "extensions/common/manifest_handlers/web_accessible_resources_info.h"
namespace extensions {
ExtensionNavigationRegistry::ExtensionNavigationRegistry(
content::BrowserContext* browser_context)
: browser_context_(browser_context) {}
ExtensionNavigationRegistry::~ExtensionNavigationRegistry() = default;
// static
ExtensionNavigationRegistry* ExtensionNavigationRegistry::Get(
content::BrowserContext* context) {
return BrowserContextKeyedAPIFactory<ExtensionNavigationRegistry>::Get(
context);
}
// static
BrowserContextKeyedAPIFactory<ExtensionNavigationRegistry>*
ExtensionNavigationRegistry::GetFactoryInstance() {
static base::NoDestructor<
BrowserContextKeyedAPIFactory<ExtensionNavigationRegistry>>
instance;
return instance.get();
}
void ExtensionNavigationRegistry::RecordExtensionRedirect(
int64_t navigation_handle_id,
const GURL& target_url,
const ExtensionId& extension_id) {
if (!IsEnabled()) {
return;
}
redirect_metadata_.emplace(navigation_handle_id,
Metadata(target_url, extension_id));
}
void ExtensionNavigationRegistry::Erase(int64_t navigation_handle_id) {
if (!IsEnabled()) {
return;
}
auto it = redirect_metadata_.find(navigation_handle_id);
if (it == redirect_metadata_.end()) {
return;
}
redirect_metadata_.erase(it);
}
std::optional<ExtensionNavigationRegistry::Metadata>
ExtensionNavigationRegistry::GetAndErase(int64_t navigation_handle_id) {
if (!IsEnabled()) {
return std::nullopt;
}
auto it = redirect_metadata_.find(navigation_handle_id);
if (it == redirect_metadata_.end()) {
return std::nullopt;
}
Metadata metadata = it->second;
redirect_metadata_.erase(it);
return metadata;
}
bool ExtensionNavigationRegistry::IsEnabled() {
return base::FeatureList::IsEnabled(
extensions_features::kExtensionWARForRedirect);
}
bool ExtensionNavigationRegistry::CanRedirect(int64_t navigation_id,
const GURL& gurl,
const Extension& extension) {
if (!IsEnabled()) {
return true;
}
std::optional<Metadata> extension_redirect_recorded =
GetAndErase(navigation_id);
// Block requests for navigations unaltered by webRequest.
if (!extension_redirect_recorded.has_value()) {
return false;
}
// Block requests if the extension or url are unexpected.
// TODO(crbug.com/40060076): Verify WAR access for the recorded extension
// instead of checking for equality with the target extension.
auto metadata = extension_redirect_recorded.value();
if (metadata.gurl != gurl) {
return false;
}
if (metadata.extension_id == extension.id()) {
return true;
}
return true;
}
} // namespace extensions
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