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// Copyright 2022 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/winhttp/network_fetcher.h"
#include <windows.h>
#include <cstdint>
#include <memory>
#include <optional>
#include <string>
#include <utility>
#include "base/containers/flat_map.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/functional/callback_helpers.h"
#include "base/logging.h"
#include "base/memory/scoped_refptr.h"
#include "base/sequence_checker.h"
#include "base/strings/sys_string_conversions.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/updater/net/network.h"
#include "chrome/updater/policy/service.h"
#include "chrome/updater/updater_scope.h"
#include "chrome/updater/util/util.h"
#include "chrome/updater/util/win_util.h"
#include "chrome/updater/win/scoped_handle.h"
#include "chrome/updater/win/scoped_impersonation.h"
#include "chrome/updater/win/user_info.h"
#include "components/update_client/network.h"
#include "components/winhttp/proxy_configuration.h"
#include "components/winhttp/scoped_hinternet.h"
#include "url/gurl.h"
namespace updater {
namespace {
// Factory method for the proxy configuration strategy.
scoped_refptr<winhttp::ProxyConfiguration> GetProxyConfiguration(
std::optional<PolicyServiceProxyConfiguration>
policy_service_proxy_configuration) {
if (policy_service_proxy_configuration) {
VLOG(1) << "Using cloud policy configuration for proxy.";
return base::MakeRefCounted<winhttp::ProxyConfiguration>(winhttp::ProxyInfo{
policy_service_proxy_configuration->proxy_auto_detect,
base::SysUTF8ToWide(
policy_service_proxy_configuration->proxy_pac_url.value_or("")),
base::SysUTF8ToWide(
policy_service_proxy_configuration->proxy_url.value_or("")),
L""});
}
VLOG(1) << "Using the system configuration for proxy.";
return base::MakeRefCounted<winhttp::AutoProxyConfiguration>();
}
class NetworkFetcher : public update_client::NetworkFetcher {
public:
using ResponseStartedCallback =
update_client::NetworkFetcher::ResponseStartedCallback;
using ProgressCallback = update_client::NetworkFetcher::ProgressCallback;
using PostRequestCompleteCallback =
update_client::NetworkFetcher::PostRequestCompleteCallback;
using DownloadToFileCompleteCallback =
update_client::NetworkFetcher::DownloadToFileCompleteCallback;
NetworkFetcher(scoped_refptr<winhttp::SharedHInternet> session_handle,
scoped_refptr<winhttp::ProxyConfiguration> proxy_config);
~NetworkFetcher() override;
NetworkFetcher(const NetworkFetcher&) = delete;
NetworkFetcher& operator=(const NetworkFetcher&) = delete;
// NetworkFetcher overrides.
void PostRequest(
const GURL& url,
const std::string& post_data,
const std::string& content_type,
const base::flat_map<std::string, std::string>& post_additional_headers,
ResponseStartedCallback response_started_callback,
ProgressCallback progress_callback,
PostRequestCompleteCallback post_request_complete_callback) override;
base::OnceClosure DownloadToFile(
const GURL& url,
const base::FilePath& file_path,
ResponseStartedCallback response_started_callback,
ProgressCallback progress_callback,
DownloadToFileCompleteCallback download_to_file_complete_callback)
override;
private:
SEQUENCE_CHECKER(sequence_checker_);
void PostRequestComplete(int response_code);
void DownloadToFileComplete(int response_code);
scoped_refptr<winhttp::NetworkFetcher> winhttp_network_fetcher_;
DownloadToFileCompleteCallback download_to_file_complete_callback_;
PostRequestCompleteCallback post_request_complete_callback_;
};
NetworkFetcher::NetworkFetcher(
scoped_refptr<winhttp::SharedHInternet> session_handle,
scoped_refptr<winhttp::ProxyConfiguration> proxy_config)
: winhttp_network_fetcher_(
base::MakeRefCounted<winhttp::NetworkFetcher>(session_handle,
proxy_config)) {}
NetworkFetcher::~NetworkFetcher() {
winhttp_network_fetcher_->Close();
}
void NetworkFetcher::PostRequest(
const GURL& url,
const std::string& post_data,
const std::string& content_type,
const base::flat_map<std::string, std::string>& post_additional_headers,
ResponseStartedCallback response_started_callback,
ProgressCallback progress_callback,
PostRequestCompleteCallback post_request_complete_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
VLOG(2) << __func__;
post_request_complete_callback_ = std::move(post_request_complete_callback);
winhttp_network_fetcher_->PostRequest(
url, post_data, content_type, post_additional_headers,
std::move(response_started_callback), std::move(progress_callback),
base::BindOnce(&NetworkFetcher::PostRequestComplete,
base::Unretained(this)));
}
base::OnceClosure NetworkFetcher::DownloadToFile(
const GURL& url,
const base::FilePath& file_path,
ResponseStartedCallback response_started_callback,
ProgressCallback progress_callback,
DownloadToFileCompleteCallback download_to_file_complete_callback) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
VLOG(2) << __func__;
download_to_file_complete_callback_ =
std::move(download_to_file_complete_callback);
return winhttp_network_fetcher_->DownloadToFile(
url, file_path, std::move(response_started_callback),
std::move(progress_callback),
base::BindOnce(&NetworkFetcher::DownloadToFileComplete,
base::Unretained(this)));
}
void NetworkFetcher::PostRequestComplete(int response_code) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
VLOG(2) << __func__ << ": response code=" << response_code;
// Attempt to get some response headers. Not all headers may be present so
// this is best effort only.
std::wstring x_cup_server_proof;
std::wstring etag;
std::wstring cookie;
int x_retry_after_sec = -1;
winhttp_network_fetcher_->QueryHeaderString(
base::SysUTF8ToWide(
update_client::NetworkFetcher::kHeaderXCupServerProof),
&x_cup_server_proof);
winhttp_network_fetcher_->QueryHeaderString(
base::SysUTF8ToWide(update_client::NetworkFetcher::kHeaderEtag), &etag);
winhttp_network_fetcher_->QueryHeaderString(
base::SysUTF8ToWide(update_client::NetworkFetcher::kHeaderCookie),
&cookie);
winhttp_network_fetcher_->QueryHeaderInt(
base::SysUTF8ToWide(update_client::NetworkFetcher::kHeaderXRetryAfter),
&x_retry_after_sec);
std::move(post_request_complete_callback_)
.Run(winhttp_network_fetcher_->GetResponseBody(),
winhttp_network_fetcher_->GetNetError(), base::SysWideToUTF8(etag),
base::SysWideToUTF8(x_cup_server_proof), base::SysWideToUTF8(cookie),
x_retry_after_sec);
}
void NetworkFetcher::DownloadToFileComplete(int /*response_code*/) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
VLOG(2) << __func__;
std::move(download_to_file_complete_callback_)
.Run(winhttp_network_fetcher_->GetNetError(),
winhttp_network_fetcher_->GetContentSize());
}
} // namespace
class NetworkFetcherFactory::Impl {
public:
explicit Impl(std::optional<PolicyServiceProxyConfiguration>
policy_service_proxy_configuration)
: proxy_configuration_(
GetProxyConfiguration(policy_service_proxy_configuration)) {
ScopedImpersonation impersonate;
if (IsSystemInstall()) {
HResultOr<ScopedKernelHANDLE> token = GetLoggedOnUserToken();
VLOG_IF(2, !token.has_value())
<< __func__ << ": GetLoggedOnUserToken failed: " << std::hex
<< token.error();
if (token.has_value()) {
const HRESULT hr = impersonate.Impersonate(token.value().get());
VLOG(2)
<< __func__
<< ": Successfully got logged on user token. Impersonate result: "
<< std::hex << hr;
}
}
session_handle_ = base::MakeRefCounted<winhttp::SharedHInternet>(
winhttp::CreateSessionHandle(base::SysUTF8ToWide(GetUpdaterUserAgent()),
proxy_configuration_->access_type(),
proxy_configuration_->proxy(),
proxy_configuration_->proxy_bypass()));
VLOG_IF(2, !session_handle_) << "Failed to create a winhttp session.";
}
std::unique_ptr<update_client::NetworkFetcher> Create() {
return session_handle_ ? std::make_unique<NetworkFetcher>(
session_handle_, proxy_configuration_)
: nullptr;
}
private:
scoped_refptr<winhttp::ProxyConfiguration> proxy_configuration_;
scoped_refptr<winhttp::SharedHInternet> session_handle_;
};
NetworkFetcherFactory::NetworkFetcherFactory(
std::optional<PolicyServiceProxyConfiguration>
policy_service_proxy_configuration)
: impl_(std::make_unique<Impl>(policy_service_proxy_configuration)) {}
NetworkFetcherFactory::~NetworkFetcherFactory() = default;
std::unique_ptr<update_client::NetworkFetcher> NetworkFetcherFactory::Create()
const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return impl_->Create();
}
} // namespace updater
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