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// Copyright 2017 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/safe_browsing/content/browser/mojo_safe_browsing_impl.h"
#include <memory>
#include "base/functional/bind.h"
#include "base/supports_user_data.h"
#include "components/safe_browsing/content/browser/web_ui/safe_browsing_ui.h"
#include "components/safe_browsing/core/browser/safe_browsing_url_checker_impl.h"
#include "components/safe_browsing/core/common/features.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
#include "mojo/public/cpp/bindings/callback_helpers.h"
#include "mojo/public/cpp/bindings/pending_receiver.h"
#include "mojo/public/cpp/bindings/self_owned_receiver.h"
#include "net/base/load_flags.h"
#include "third_party/blink/public/mojom/loader/resource_load_info.mojom-shared.h"
namespace safe_browsing {
namespace {
content::WebContents* GetWebContentsFromToken(
int render_process_id,
const std::optional<blink::LocalFrameToken>& frame_token) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (!frame_token) {
return nullptr;
}
content::RenderFrameHost* render_frame_host =
content::RenderFrameHost::FromFrameToken(
content::GlobalRenderFrameHostToken(render_process_id,
frame_token.value()));
if (!render_frame_host) {
return nullptr;
}
return content::WebContents::FromRenderFrameHost(render_frame_host);
}
} // namespace
MojoSafeBrowsingImpl::MojoSafeBrowsingImpl(
scoped_refptr<UrlCheckerDelegate> delegate,
int render_process_id,
base::SupportsUserData* user_data)
: delegate_(std::move(delegate)),
render_process_id_(render_process_id),
user_data_(user_data) {
// It is safe to bind |this| as Unretained because |receivers_| is owned by
// |this| and will not call this callback after it is destroyed.
receivers_.set_disconnect_handler(base::BindRepeating(
&MojoSafeBrowsingImpl::OnMojoDisconnect, base::Unretained(this)));
}
MojoSafeBrowsingImpl::~MojoSafeBrowsingImpl() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
}
// static
void MojoSafeBrowsingImpl::MaybeCreate(
int render_process_id,
const base::RepeatingCallback<scoped_refptr<UrlCheckerDelegate>()>&
delegate_getter,
mojo::PendingReceiver<mojom::SafeBrowsing> receiver) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
scoped_refptr<UrlCheckerDelegate> delegate = delegate_getter.Run();
if (!delegate) {
return;
}
base::SupportsUserData* user_data;
content::RenderProcessHost* rph =
content::RenderProcessHost::FromID(render_process_id);
DCHECK(rph);
user_data = rph->GetBrowserContext();
std::unique_ptr<MojoSafeBrowsingImpl> impl(new MojoSafeBrowsingImpl(
std::move(delegate), render_process_id, user_data));
impl->Clone(std::move(receiver));
// Need to store the value of |impl.get()| in a temp variable instead of
// getting the value on the same line as |std::move(impl)|, because the
// evaluation order is unspecified.
const void* key = impl.get();
user_data->SetUserData(key, std::move(impl));
}
void MojoSafeBrowsingImpl::CreateCheckerAndCheck(
const std::optional<blink::LocalFrameToken>& frame_token,
mojo::PendingReceiver<mojom::SafeBrowsingUrlChecker> receiver,
const GURL& url,
const std::string& method,
const net::HttpRequestHeaders& headers,
int32_t load_flags,
bool has_user_gesture,
bool originated_from_service_worker,
CreateCheckerAndCheckCallback callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
std::optional<base::UnguessableToken> sb_frame_token;
if (frame_token) {
sb_frame_token = frame_token->value();
}
if (delegate_->ShouldSkipRequestCheck(url, content::FrameTreeNodeId().value(),
render_process_id_, sb_frame_token,
originated_from_service_worker)) {
// Ensure that we don't destroy an uncalled CreateCheckerAndCheckCallback
if (callback) {
std::move(callback).Run(true /* proceed */,
false /* showed_interstitial */);
}
// This will drop |receiver|. The result is that the renderer side will
// consider all URLs in the redirect chain of this receiver as safe.
return;
}
// This is not called for frame resources, and real time URL checks currently
// only support main frame resources. If we extend real time URL checks to
// support non-main frames, we will need to provide the user preferences,
// url_lookup_service regarding real time lookup here. If we extend
// hash-prefix real-time checks to support non-main frames, we will need to
// provide the hash_realtime_service_on_ui here.
auto checker_impl = std::make_unique<SafeBrowsingUrlCheckerImpl>(
headers, static_cast<int>(load_flags), has_user_gesture, delegate_,
base::BindRepeating(&GetWebContentsFromToken, render_process_id_,
frame_token),
/*weak_web_state=*/nullptr, render_process_id_, sb_frame_token,
content::FrameTreeNodeId().value(),
/*navigation_id=*/std::nullopt,
/*url_real_time_lookup_enabled=*/false,
/*can_check_db=*/true, /*can_check_high_confidence_allowlist=*/true,
/*url_lookup_service_metric_suffix=*/".None",
content::GetUIThreadTaskRunner({}),
/*url_lookup_service=*/nullptr,
/*hash_realtime_service_on_ui=*/nullptr,
/*hash_realtime_selection=*/
hash_realtime_utils::HashRealTimeSelection::kNone,
/*is_async_check=*/false, /*check_allowlist_before_hash_database=*/false,
SessionID::InvalidValue(), /*referring_app_info=*/std::nullopt);
auto weak_impl = checker_impl->WeakPtr();
checker_impl->CheckUrl(url, method,
mojo::WrapCallbackWithDefaultInvokeIfNotRun(
std::move(callback),
/*proceed=*/true, /*showed_interstitial=*/false));
CHECK(weak_impl); // This is to ensure calling CheckUrl doesn't delete itself
mojo::MakeSelfOwnedReceiver(std::move(checker_impl), std::move(receiver));
}
void MojoSafeBrowsingImpl::Clone(
mojo::PendingReceiver<mojom::SafeBrowsing> receiver) {
receivers_.Add(this, std::move(receiver));
}
void MojoSafeBrowsingImpl::OnMojoDisconnect() {
if (receivers_.empty()) {
user_data_->RemoveUserData(this);
// This object is destroyed.
}
}
} // namespace safe_browsing
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