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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/setup/host_starter.h"
#include <utility>
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/guid.h"
#include "base/location.h"
#include "base/memory/ptr_util.h"
#include "base/threading/thread_task_runner_handle.h"
#include "base/values.h"
#include "google_apis/google_api_keys.h"
#include "remoting/host/pin_hash.h"
#include "remoting/host/setup/oauth_helper.h"
namespace {
const int kMaxGetTokensRetries = 3;
} // namespace
namespace remoting {
HostStarter::HostStarter(
std::unique_ptr<gaia::GaiaOAuthClient> oauth_client,
std::unique_ptr<remoting::ServiceClient> service_client,
scoped_refptr<remoting::DaemonController> daemon_controller)
: oauth_client_(std::move(oauth_client)),
service_client_(std::move(service_client)),
daemon_controller_(daemon_controller),
consent_to_data_collection_(false),
unregistering_host_(false),
weak_ptr_factory_(this) {
weak_ptr_ = weak_ptr_factory_.GetWeakPtr();
main_task_runner_ = base::ThreadTaskRunnerHandle::Get();
}
HostStarter::~HostStarter() {}
std::unique_ptr<HostStarter> HostStarter::Create(
const std::string& chromoting_hosts_url,
net::URLRequestContextGetter* url_request_context_getter) {
return base::WrapUnique(new HostStarter(
base::MakeUnique<gaia::GaiaOAuthClient>(url_request_context_getter),
base::MakeUnique<remoting::ServiceClient>(chromoting_hosts_url,
url_request_context_getter),
remoting::DaemonController::Create()));
}
void HostStarter::StartHost(
const std::string& host_name,
const std::string& host_pin,
bool consent_to_data_collection,
const std::string& auth_code,
const std::string& redirect_url,
CompletionCallback on_done) {
DCHECK(main_task_runner_->BelongsToCurrentThread());
DCHECK(on_done_.is_null());
host_name_ = host_name;
host_pin_ = host_pin;
consent_to_data_collection_ = consent_to_data_collection;
on_done_ = on_done;
oauth_client_info_.client_id =
google_apis::GetOAuth2ClientID(google_apis::CLIENT_REMOTING);
oauth_client_info_.client_secret =
google_apis::GetOAuth2ClientSecret(google_apis::CLIENT_REMOTING);
oauth_client_info_.redirect_uri = redirect_url;
// Map the authorization code to refresh and access tokens.
oauth_client_->GetTokensFromAuthCode(oauth_client_info_, auth_code,
kMaxGetTokensRetries, this);
}
void HostStarter::OnGetTokensResponse(
const std::string& refresh_token,
const std::string& access_token,
int expires_in_seconds) {
if (!main_task_runner_->BelongsToCurrentThread()) {
main_task_runner_->PostTask(FROM_HERE, base::Bind(
&HostStarter::OnGetTokensResponse, weak_ptr_,
refresh_token, access_token, expires_in_seconds));
return;
}
refresh_token_ = refresh_token;
access_token_ = access_token;
// Get the email corresponding to the access token.
oauth_client_->GetUserEmail(access_token_, 1, this);
}
void HostStarter::OnRefreshTokenResponse(
const std::string& access_token,
int expires_in_seconds) {
// We never request a refresh token, so this call is not expected.
NOTREACHED();
}
// This function is called twice: once with the host owner credentials, and once
// with the service account credentials.
void HostStarter::OnGetUserEmailResponse(const std::string& user_email) {
if (!main_task_runner_->BelongsToCurrentThread()) {
main_task_runner_->PostTask(FROM_HERE, base::Bind(
&HostStarter::OnGetUserEmailResponse, weak_ptr_, user_email));
return;
}
if (host_owner_.empty()) {
// This is the first callback, with the host owner credentials. Store the
// owner's email, and register the host.
host_owner_ = user_email;
host_id_ = base::GenerateGUID();
key_pair_ = RsaKeyPair::Generate();
std::string host_client_id;
host_client_id = google_apis::GetOAuth2ClientID(
google_apis::CLIENT_REMOTING_HOST);
service_client_->RegisterHost(
host_id_, host_name_, key_pair_->GetPublicKey(), host_client_id,
access_token_, this);
} else {
// This is the second callback, with the service account credentials.
// This email is the service account's email, used to login to XMPP.
xmpp_login_ = user_email;
StartHostProcess();
}
}
void HostStarter::OnHostRegistered(const std::string& authorization_code) {
if (!main_task_runner_->BelongsToCurrentThread()) {
main_task_runner_->PostTask(FROM_HERE, base::Bind(
&HostStarter::OnHostRegistered, weak_ptr_, authorization_code));
return;
}
if (authorization_code.empty()) {
// No service account code, start the host with the owner's credentials.
xmpp_login_ = host_owner_;
StartHostProcess();
return;
}
// Received a service account authorization code, update oauth_client_info_
// to use the service account client keys, and get service account tokens.
oauth_client_info_.client_id =
google_apis::GetOAuth2ClientID(
google_apis::CLIENT_REMOTING_HOST);
oauth_client_info_.client_secret =
google_apis::GetOAuth2ClientSecret(
google_apis::CLIENT_REMOTING_HOST);
oauth_client_info_.redirect_uri = "oob";
oauth_client_->GetTokensFromAuthCode(
oauth_client_info_, authorization_code, kMaxGetTokensRetries, this);
}
void HostStarter::StartHostProcess() {
// Start the host.
std::string host_secret_hash = remoting::MakeHostPinHash(host_id_, host_pin_);
std::unique_ptr<base::DictionaryValue> config(new base::DictionaryValue());
if (host_owner_ != xmpp_login_) {
config->SetString("host_owner", host_owner_);
}
config->SetString("xmpp_login", xmpp_login_);
config->SetString("oauth_refresh_token", refresh_token_);
config->SetString("host_id", host_id_);
config->SetString("host_name", host_name_);
config->SetString("private_key", key_pair_->ToString());
config->SetString("host_secret_hash", host_secret_hash);
daemon_controller_->SetConfigAndStart(
std::move(config), consent_to_data_collection_,
base::Bind(&HostStarter::OnHostStarted, base::Unretained(this)));
}
void HostStarter::OnHostStarted(DaemonController::AsyncResult result) {
if (!main_task_runner_->BelongsToCurrentThread()) {
main_task_runner_->PostTask(FROM_HERE, base::Bind(
&HostStarter::OnHostStarted, weak_ptr_, result));
return;
}
if (result != DaemonController::RESULT_OK) {
unregistering_host_ = true;
service_client_->UnregisterHost(host_id_, access_token_, this);
return;
}
base::ResetAndReturn(&on_done_).Run(START_COMPLETE);
}
void HostStarter::OnOAuthError() {
if (!main_task_runner_->BelongsToCurrentThread()) {
main_task_runner_->PostTask(FROM_HERE, base::Bind(
&HostStarter::OnOAuthError, weak_ptr_));
return;
}
if (unregistering_host_) {
LOG(ERROR) << "OAuth error occurred when unregistering host.";
}
base::ResetAndReturn(&on_done_)
.Run(unregistering_host_ ? START_ERROR : OAUTH_ERROR);
}
void HostStarter::OnNetworkError(int response_code) {
if (!main_task_runner_->BelongsToCurrentThread()) {
main_task_runner_->PostTask(FROM_HERE, base::Bind(
&HostStarter::OnNetworkError, weak_ptr_, response_code));
return;
}
if (unregistering_host_) {
LOG(ERROR) << "Network error occurred when unregistering host.";
}
base::ResetAndReturn(&on_done_)
.Run(unregistering_host_ ? START_ERROR : NETWORK_ERROR);
}
void HostStarter::OnHostUnregistered() {
if (!main_task_runner_->BelongsToCurrentThread()) {
main_task_runner_->PostTask(FROM_HERE, base::Bind(
&HostStarter::OnHostUnregistered, weak_ptr_));
return;
}
base::ResetAndReturn(&on_done_).Run(START_ERROR);
}
} // namespace remoting
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