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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/safe_browsing/download_protection/download_feedback.h"
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/memory/ptr_util.h"
#include "base/task/task_runner.h"
#include "base/task/thread_pool.h"
#include "chrome/browser/safe_browsing/cloud_content_scanning/multipart_uploader.h"
#include "components/safe_browsing/core/common/proto/csd.pb.h"
#include "content/public/browser/browser_thread.h"
#include "net/base/net_errors.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
namespace safe_browsing {
namespace {
// Handles the uploading of a single downloaded binary to the safebrowsing
// download feedback service.
class DownloadFeedbackImpl : public DownloadFeedback {
public:
DownloadFeedbackImpl(
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
const base::FilePath& file_path,
uint64_t file_size,
const std::string& ping_request,
const std::string& ping_response);
DownloadFeedbackImpl(const DownloadFeedbackImpl&) = delete;
DownloadFeedbackImpl& operator=(const DownloadFeedbackImpl&) = delete;
~DownloadFeedbackImpl() override;
void Start(base::OnceClosure finish_callback) override;
const std::string& GetPingRequestForTesting() const override {
return ping_request_;
}
const std::string& GetPingResponseForTesting() const override {
return ping_response_;
}
private:
// Callback for TwoPhaseUploader completion. Relays the result to the
// |finish_callback|.
void FinishedUpload(base::OnceClosure finish_callback,
bool success,
int response_code,
const std::string& response);
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory_;
const base::FilePath file_path_;
uint64_t file_size_;
// The safebrowsing request and response of checking that this binary is
// unsafe.
std::string ping_request_;
std::string ping_response_;
std::unique_ptr<ConnectorUploadRequest> uploader_;
};
DownloadFeedbackImpl::DownloadFeedbackImpl(
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
const base::FilePath& file_path,
uint64_t file_size,
const std::string& ping_request,
const std::string& ping_response)
: url_loader_factory_(url_loader_factory),
file_path_(file_path),
file_size_(file_size),
ping_request_(ping_request),
ping_response_(ping_response) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DVLOG(1) << "DownloadFeedback constructed " << this << " for "
<< file_path.AsUTF8Unsafe();
}
DownloadFeedbackImpl::~DownloadFeedbackImpl() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DVLOG(1) << "DownloadFeedback destructed " << this;
if (uploader_) {
// Destroy the uploader before attempting to delete the file.
uploader_.reset();
}
base::ThreadPool::CreateSequencedTaskRunner(
{base::MayBlock(), base::TaskPriority::BEST_EFFORT})
->PostTask(FROM_HERE, base::GetDeleteFileCallback(file_path_));
}
void DownloadFeedbackImpl::Start(base::OnceClosure finish_callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(!uploader_);
if (!url_loader_factory_) {
std::move(finish_callback).Run();
return;
}
ClientDownloadReport report_metadata;
bool r = report_metadata.mutable_download_request()->ParseFromString(
ping_request_);
DCHECK(r);
r = report_metadata.mutable_download_response()->ParseFromString(
ping_response_);
DCHECK(r);
std::string metadata_string;
bool ok = report_metadata.SerializeToString(&metadata_string);
DCHECK(ok);
net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation("safe_browsing_feedback", R"(
semantics {
sender: "Safe Browsing Download Protection Feedback"
description:
"When a user downloads a binary that Safe Browsing declares as "
"suspicious, opted-in clients may upload that binary to Safe "
"Browsing to improve the classification. This helps protect users "
"from malware and unwanted software."
trigger:
"The browser will upload the binary to Google when a "
"download-protection verdict is 'Not Safe', and the user is opted "
"in to extended reporting."
data:
"The suspicious binary file."
destination: GOOGLE_OWNED_SERVICE
}
policy {
cookies_allowed: YES
cookies_store: "Safe Browsing Cookie Store"
setting:
"Users can enable or disable this feature by stopping sending "
"security incident reports to Google via disabling 'Automatically "
"report details of possible security incidents to Google.' in "
"Chrome's settings under Advanced Settings, Privacy. The feature "
"is disabled by default."
chrome_policy {
SafeBrowsingExtendedReportingEnabled {
policy_options {mode: MANDATORY}
SafeBrowsingExtendedReportingEnabled: false
}
}
})");
uploader_ = MultipartUploadRequest::CreateFileRequest(
url_loader_factory_, GURL(kSbFeedbackURL), metadata_string, file_path_,
file_size_, false, "DownloadFeedback", traffic_annotation,
base::BindOnce(&DownloadFeedbackImpl::FinishedUpload,
base::Unretained(this), std::move(finish_callback)));
uploader_->Start();
}
void DownloadFeedbackImpl::FinishedUpload(base::OnceClosure finish_callback,
bool success,
int response_code,
const std::string& response_data) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
uploader_.reset();
std::move(finish_callback).Run();
// We may be deleted here.
}
} // namespace
// static
const int64_t DownloadFeedback::kMaxUploadSize = 50 * 1024 * 1024;
// static
const char DownloadFeedback::kSbFeedbackURL[] =
"https://safebrowsing.google.com/safebrowsing/uploads/chrome";
// static
DownloadFeedbackFactory* DownloadFeedback::factory_ = nullptr;
// static
std::unique_ptr<DownloadFeedback> DownloadFeedback::Create(
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
const base::FilePath& file_path,
uint64_t file_size,
const std::string& ping_request,
const std::string& ping_response) {
if (!factory_) {
return base::WrapUnique(new DownloadFeedbackImpl(
url_loader_factory, file_path, file_size, ping_request, ping_response));
}
return DownloadFeedback::factory_->CreateDownloadFeedback(
url_loader_factory, file_path, file_size, ping_request, ping_response);
}
} // namespace safe_browsing
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