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content / browser / interest_group / auction_url_loader_factory_proxy.cc [blame]
// Copyright 2021 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/interest_group/auction_url_loader_factory_proxy.h"
#include <stdint.h>
#include <memory>
#include <optional>
#include <utility>
#include "base/check.h"
#include "base/debug/crash_logging.h"
#include "base/functional/callback.h"
#include "base/memory/ref_counted.h"
#include "base/strings/escape.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "content/browser/devtools/devtools_instrumentation.h"
#include "content/browser/devtools/network_service_devtools_observer.h"
#include "content/browser/interest_group/interest_group_features.h"
#include "content/browser/interest_group/subresource_url_authorizations.h"
#include "content/browser/interest_group/subresource_url_builder.h"
#include "content/browser/renderer_host/frame_tree_node.h"
#include "content/public/browser/global_request_id.h"
#include "content/services/auction_worklet/public/mojom/auction_network_events_handler.mojom.h"
#include "mojo/public/cpp/bindings/message.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/pending_remote.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "net/base/isolation_info.h"
#include "net/base/load_flags.h"
#include "net/base/network_anonymization_key.h"
#include "net/cookies/site_for_cookies.h"
#include "net/http/http_request_headers.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "services/network/public/cpp/resource_request.h"
#include "services/network/public/mojom/cookie_manager.mojom-shared.h"
#include "services/network/public/mojom/url_loader_factory.mojom.h"
#include "third_party/blink/public/common/features.h"
#include "third_party/blink/public/mojom/interest_group/interest_group_types.mojom.h"
#include "url/gurl.h"
#include "url/origin.h"
namespace content {
namespace {
// Helper to create the IsolationInfo used for all bidder requests. A helper
// method is used to avoid having to construct two copies of `bidder_origin`.
net::IsolationInfo CreateBidderIsolationInfo(const url::Origin& bidder_origin) {
return net::IsolationInfo::Create(net::IsolationInfo::RequestType::kOther,
bidder_origin, bidder_origin,
net::SiteForCookies());
}
} // namespace
AuctionURLLoaderFactoryProxy::AuctionURLLoaderFactoryProxy(
mojo::PendingReceiver<network::mojom::URLLoaderFactory> pending_receiver,
GetUrlLoaderFactoryCallback get_frame_url_loader_factory,
GetUrlLoaderFactoryCallback get_trusted_url_loader_factory,
PreconnectSocketCallback preconnect_socket_callback,
GetCookieDeprecationLabelCallback get_cookie_deprecation_label,
GetDevtoolsAuctionIdsCallback get_devtools_auction_ids,
bool force_reload,
const url::Origin& top_frame_origin,
const url::Origin& frame_origin,
std::optional<int> renderer_process_id,
bool is_for_seller,
network::mojom::ClientSecurityStatePtr client_security_state,
const GURL& script_url,
const std::optional<GURL>& wasm_url,
const std::optional<GURL>& trusted_signals_base_url,
bool needs_cors_for_additional_bid,
FrameTreeNodeId frame_tree_node_id)
: receiver_(this, std::move(pending_receiver)),
get_frame_url_loader_factory_(std::move(get_frame_url_loader_factory)),
get_trusted_url_loader_factory_(
std::move(get_trusted_url_loader_factory)),
get_cookie_deprecation_label_(std::move(get_cookie_deprecation_label)),
get_devtools_auction_ids_(std::move(get_devtools_auction_ids)),
top_frame_origin_(top_frame_origin),
frame_origin_(frame_origin),
renderer_process_id_(renderer_process_id),
is_for_seller_(is_for_seller),
force_reload_(force_reload),
client_security_state_(std::move(client_security_state)),
isolation_info_(is_for_seller ? net::IsolationInfo::CreateTransient()
: CreateBidderIsolationInfo(
url::Origin::Create(script_url))),
owner_frame_tree_node_id_(frame_tree_node_id),
script_url_(script_url),
wasm_url_(wasm_url),
trusted_signals_base_url_(trusted_signals_base_url),
needs_cors_for_additional_bid_(needs_cors_for_additional_bid) {
DCHECK(client_security_state_);
if (trusted_signals_base_url_) {
std::move(preconnect_socket_callback)
.Run(*trusted_signals_base_url_,
isolation_info_.network_anonymization_key());
}
// `needs_cors_for_additional_bid_` applies only to buyer stuff.
DCHECK(!(is_for_seller_ && needs_cors_for_additional_bid_));
}
AuctionURLLoaderFactoryProxy::~AuctionURLLoaderFactoryProxy() = default;
void AuctionURLLoaderFactoryProxy::CreateLoaderAndStart(
mojo::PendingReceiver<network::mojom::URLLoader> receiver,
int32_t request_id,
uint32_t options,
const network::ResourceRequest& url_request,
mojo::PendingRemote<network::mojom::URLLoaderClient> client,
const net::MutableNetworkTrafficAnnotationTag& traffic_annotation) {
// Worklet requests must include a request header.
std::optional<std::string> opt_accept_header =
url_request.headers.GetHeader(net::HttpRequestHeaders::kAccept);
if (!opt_accept_header) {
receiver_.ReportBadMessage("Missing accept header");
return;
}
std::string accept_header = std::move(opt_accept_header).value();
bool is_request_allowed = false;
bool is_trusted_signals_request = false;
std::optional<InterestGroupAuctionFetchType> event_type;
const SubresourceUrlBuilder::BundleSubresourceInfo* maybe_subresource_info =
nullptr;
std::optional<network::ResourceRequest::WebBundleTokenParams>
maybe_web_bundle_token_params;
if (url_request.url == script_url_ &&
accept_header == "application/javascript") {
is_request_allowed = true;
event_type = is_for_seller_ ? InterestGroupAuctionFetchType::kSellerJs
: InterestGroupAuctionFetchType::kBidderJs;
} else if (wasm_url_.has_value() && url_request.url == wasm_url_.value() &&
accept_header == "application/wasm") {
event_type = InterestGroupAuctionFetchType::kBidderWasm;
is_request_allowed = true;
} else if (CouldBeTrustedSignalsUrl(url_request.url, accept_header)) {
event_type = is_for_seller_
? InterestGroupAuctionFetchType::kSellerTrustedSignals
: InterestGroupAuctionFetchType::kBidderTrustedSignals;
is_request_allowed = true;
is_trusted_signals_request = true;
} else {
maybe_subresource_info =
subresource_url_authorizations_.GetAuthorizationInfo(url_request.url);
if (maybe_subresource_info != nullptr) {
DCHECK(renderer_process_id_);
is_request_allowed = true;
maybe_web_bundle_token_params =
network::ResourceRequest::WebBundleTokenParams(
/*bundle_url=*/
maybe_subresource_info->info_from_renderer.bundle_url,
/*token=*/maybe_subresource_info->info_from_renderer.token,
/*render_process_id=*/*renderer_process_id_);
}
}
if (!is_request_allowed) {
// Debugging for https://crbug.com/1448458
SCOPED_CRASH_KEY_STRING32("fledge", "req-accept", accept_header);
SCOPED_CRASH_KEY_STRING256("fledge", "req-url",
url_request.url.possibly_invalid_spec());
SCOPED_CRASH_KEY_STRING256("fledge", "expect-script-url",
script_url_.possibly_invalid_spec());
SCOPED_CRASH_KEY_STRING256(
"fledge", "expect-wasm-url",
wasm_url_.value_or(GURL()).possibly_invalid_spec());
SCOPED_CRASH_KEY_STRING256(
"fledge", "expect-trusted",
trusted_signals_base_url_.value_or(GURL()).possibly_invalid_spec());
SCOPED_CRASH_KEY_STRING256("fledge", "expect-top-frame",
top_frame_origin_.host());
receiver_.ReportBadMessage("Unexpected request");
return;
}
bool is_cross_origin_enabled_trusted_signals_request = false;
if (is_trusted_signals_request &&
base::FeatureList::IsEnabled(
blink::features::kFledgePermitCrossOriginTrustedSignals)) {
is_cross_origin_enabled_trusted_signals_request = true;
}
// Create fresh request object, only keeping the URL field and Accept request
// header for GET requests, to protect against compromised auction worklet
// processes setting values that should not have access to (e.g., sending
// credentialed requests). Only the URL and traffic annotation of the original
// request are used.
// For POST requests, also move over request method, body and content-type.
network::ResourceRequest new_request;
new_request.url = url_request.url;
new_request.web_bundle_token_params =
std::move(maybe_web_bundle_token_params);
new_request.devtools_request_id = url_request.devtools_request_id;
new_request.headers.SetHeader(net::HttpRequestHeaders::kAccept,
accept_header);
new_request.redirect_mode = network::mojom::RedirectMode::kError;
new_request.credentials_mode = network::mojom::CredentialsMode::kOmit;
new_request.request_initiator = frame_origin_;
new_request.enable_load_timing = url_request.enable_load_timing;
if (url_request.method == net::HttpRequestHeaders::kPostMethod) {
new_request.method = std::move(url_request.method);
new_request.request_body = std::move(url_request.request_body);
std::optional<std::string> content_type =
url_request.headers.GetHeader(net::HttpRequestHeaders::kContentType);
if (content_type.has_value()) {
new_request.headers.SetHeader(net::HttpRequestHeaders::kContentType,
std::move(content_type).value());
}
}
if (event_type.has_value() && new_request.devtools_request_id.has_value() &&
devtools_instrumentation::NeedInterestGroupAuctionEvents(
owner_frame_tree_node_id_)) {
std::vector<std::string> relevant_auction_ids =
get_devtools_auction_ids_.Run();
devtools_instrumentation::OnInterestGroupAuctionNetworkRequestCreated(
owner_frame_tree_node_id_, *event_type,
*new_request.devtools_request_id, relevant_auction_ids);
}
if (is_trusted_signals_request) {
std::optional<std::string> maybe_deprecation_label =
get_cookie_deprecation_label_.Run();
if (maybe_deprecation_label) {
new_request.headers.SetHeader("Sec-Cookie-Deprecation",
*maybe_deprecation_label);
}
}
if (is_cross_origin_enabled_trusted_signals_request) {
// For cross-origin trusted signals request, the principal is the origin
// of the script.
new_request.request_initiator = url::Origin::Create(script_url_);
}
if (force_reload_) {
new_request.load_flags = net::LOAD_BYPASS_CACHE;
}
if (maybe_subresource_info || needs_cors_for_additional_bid_ ||
is_cross_origin_enabled_trusted_signals_request) {
// CORS is needed.
//
// For subresource bundle requests, CORS is supported if the subresource
// URL's scheme is https and not uuid-in-package. However, unlike
// traditional network requests, the browser cannot read the response if
// kNoCors is used, even with CORS-safe methods and headers -- the response
// is blocked by ORB.
new_request.mode = network::mojom::RequestMode::kCors;
} else {
// CORS is not needed.
//
// For bidder worklets, the requests are same origin to the InterestGroup's
// owner, which was either added by the owner itself, or by a third party
// explicitly allowed to do so.
//
// For seller worklets, while the publisher page provides both the script
// and the trusted signals URLs, both requests use safe methods (GET), and
// don't set any headers, so CORS is not needed. ORB would block the
// signal's JSON response, if made in the context of the page, but the JSON
// is only made available to the same-origin script, so ORB isn't needed
// here.
//
// This does not apply if we permit trusted signals to be cross-origin from
// the corresponding script, in which has the signals origin's permission is
// required before sharing its data with the script.
new_request.mode = network::mojom::RequestMode::kNoCors;
}
GetUrlLoaderFactoryCallback url_loader_factory_getter =
get_trusted_url_loader_factory_;
if (is_for_seller_) {
if (!is_trusted_signals_request && !maybe_subresource_info) {
// The script URL is provided in its entirety by the frame initiating the
// auction, so just use its URLLoaderFactory for those requests.
url_loader_factory_getter = get_frame_url_loader_factory_;
} else {
// Other URLs combine a base URL from the frame's Javascript and data from
// bidding interest groups, so use a (single) transient IsolationInfo for
// them, to prevent exposing data across sites.
//
// The exception is DirectFromSellerSignals -- these don't come from
// interest groups, and should use the page's isolation info. However,
// they cannot use the page's URLLoaderFactory, since `trusted_params`
// needs to be populated to bypass the X-FLEDGE-Auction-Only request
// block.
new_request.trusted_params = network::ResourceRequest::TrustedParams();
if (maybe_subresource_info) {
url::Origin origin = url::Origin::Create(url_request.url);
new_request.trusted_params->isolation_info =
net::IsolationInfo::Create(net::IsolationInfo::RequestType::kOther,
origin, origin, net::SiteForCookies());
} else {
new_request.trusted_params->isolation_info = isolation_info_;
}
new_request.trusted_params->client_security_state =
client_security_state_.Clone();
}
} else if (needs_cors_for_additional_bid_) {
// For additional bid reporting, act like the frame provided it as well.
url_loader_factory_getter = get_frame_url_loader_factory_;
} else {
// Treat this as a subresource request from the owner's origin, using the
// trusted URLLoaderFactory.
//
// TODO(mmenke): This leaks information to the third party that made the
// request (both the URL itself leaks information, and using the origin's
// NIK leaks information). These leaks need to be fixed.
new_request.trusted_params = network::ResourceRequest::TrustedParams();
new_request.trusted_params->isolation_info = isolation_info_;
new_request.trusted_params->client_security_state =
client_security_state_.Clone();
}
bool network_instrumentation_enabled = false;
if (owner_frame_tree_node_id_) {
FrameTreeNode* owner_frame_tree_node =
FrameTreeNode::GloballyFindByID(owner_frame_tree_node_id_);
new_request.throttling_profile_id =
owner_frame_tree_node->current_frame_host()->devtools_frame_token();
if (base::FeatureList::IsEnabled(
features::kFledgeEnableUserAgentOverrides) &&
owner_frame_tree_node != nullptr) {
const bool override_user_agent =
owner_frame_tree_node->navigator()
.GetDelegate()
->ShouldOverrideUserAgentForRendererInitiatedNavigation();
if (override_user_agent) {
std::string maybe_user_agent = owner_frame_tree_node->navigator()
.GetDelegate()
->GetUserAgentOverride()
.ua_string_override;
if (!maybe_user_agent.empty()) {
new_request.headers.SetHeader(net::HttpRequestHeaders::kUserAgent,
std::move(maybe_user_agent));
}
}
}
devtools_instrumentation::ApplyAuctionNetworkRequestOverrides(
owner_frame_tree_node, &new_request, &network_instrumentation_enabled);
}
if (network_instrumentation_enabled) {
new_request.enable_load_timing = true;
if (new_request.trusted_params.has_value()) {
new_request.trusted_params->devtools_observer = CreateDevtoolsObserver();
}
}
url_loader_factory_getter.Run()->CreateLoaderAndStart(
std::move(receiver),
// These are browser-initiated requests, so give them a browser request
// ID. Extension APIs may expect these to be unique.
GlobalRequestID::MakeBrowserInitiated().request_id,
network::mojom::kURLLoadOptionNone, new_request, std::move(client),
traffic_annotation);
}
void AuctionURLLoaderFactoryProxy::Clone(
mojo::PendingReceiver<network::mojom::URLLoaderFactory> receiver) {
NOTREACHED_IN_MIGRATION();
}
AuctionNetworkEventsProxy::AuctionNetworkEventsProxy(
FrameTreeNodeId owner_frame_tree_node_id)
: owner_frame_tree_node_id_(owner_frame_tree_node_id) {}
AuctionNetworkEventsProxy::~AuctionNetworkEventsProxy() = default;
void AuctionNetworkEventsProxy::Clone(
mojo::PendingReceiver<auction_worklet::mojom::AuctionNetworkEventsHandler>
receiver) {
if (receiver.is_valid()) {
auction_network_events_handlers_.Add(this, std::move(receiver));
}
}
void AuctionNetworkEventsProxy::OnNetworkSendRequest(
const ::network::ResourceRequest& request,
::base::TimeTicks timestamp) {
devtools_instrumentation::OnAuctionWorkletNetworkRequestWillBeSent(
owner_frame_tree_node_id_, request, timestamp);
}
void AuctionNetworkEventsProxy::OnNetworkResponseReceived(
const std::string& request_id,
const std::string& loader_id,
const ::GURL& request_url,
::network::mojom::URLResponseHeadPtr headers) {
devtools_instrumentation::OnAuctionWorkletNetworkResponseReceived(
owner_frame_tree_node_id_, request_id, loader_id, request_url, *headers);
}
void AuctionNetworkEventsProxy::OnNetworkRequestComplete(
const std::string& request_id,
const ::network::URLLoaderCompletionStatus& status) {
devtools_instrumentation::OnAuctionWorkletNetworkRequestComplete(
owner_frame_tree_node_id_, request_id, status);
}
bool AuctionURLLoaderFactoryProxy::CouldBeTrustedSignalsUrl(
const GURL& url,
const std::string& accept_header) const {
if (!trusted_signals_base_url_) {
return false;
}
if (accept_header != "application/json" &&
accept_header != "message/ad-auction-trusted-signals-response") {
return false;
}
// Simplest way to make sure the requested URL exactly matches
// `trusted_signals_base_url_` (which has no query or reference component),
// except for an added query component is to check there's no reference, and
// then make sure it starts with the `trusted_signals_base_url_`, with a
// partial query component appended. Seems not worth fully disecting the query
// string to make sure its only keys are hostname, keys, renderUrls, and
// adComponentsRenderUrls.
if (url.has_ref()) {
return false;
}
// GURL's Mojo serialization logic may convert a valid URL that's too long
// to an invalid one. Since trusted signals URLs may be appended to, an
// invalid URL may have begun life as a valid trusted signals URL, but then
// exceeded the max length when appended to. The request for such a URL will
// fail, but that's how we normally treat such URLs, so just let it through.
if (!url.is_valid()) {
return true;
}
if (accept_header == "application/json") {
std::string full_prefix = base::StringPrintf(
"%s?hostname=%s&", trusted_signals_base_url_->spec().c_str(),
top_frame_origin_.host().c_str());
return base::StartsWith(url.spec(), full_prefix,
base::CompareCase::SENSITIVE);
} else {
return url.spec() == trusted_signals_base_url_->spec();
}
}
mojo::PendingRemote<network::mojom::DevToolsObserver>
AuctionURLLoaderFactoryProxy::CreateDevtoolsObserver() {
if (owner_frame_tree_node_id_) {
FrameTreeNode* initiator_frame_tree_node =
FrameTreeNode::GloballyFindByID(owner_frame_tree_node_id_);
if (initiator_frame_tree_node) {
return NetworkServiceDevToolsObserver::MakeSelfOwned(
initiator_frame_tree_node);
}
}
return mojo::PendingRemote<network::mojom::DevToolsObserver>();
}
} // namespace content