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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/base/cloud_session_authz_service_client_factory.h"
#include <limits.h>
#include <memory>
#include <string>
#include <string_view>
#include <utility>
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "remoting/base/cloud_service_client.h"
#include "remoting/base/instance_identity_token_getter.h"
#include "remoting/base/oauth_token_getter_impl.h"
#include "remoting/base/session_policies.h"
#include "remoting/proto/google/internal/remoting/cloud/v1alpha/duration.pb.h"
#include "remoting/proto/google/internal/remoting/cloud/v1alpha/session_authz_service.pb.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
namespace remoting {
namespace {
using Duration = google::internal::remoting::cloud::v1alpha::Duration;
using GenerateHostTokenResponse =
google::internal::remoting::cloud::v1alpha::GenerateHostTokenResponse;
using ReauthorizeHostResponse =
google::internal::remoting::cloud::v1alpha::ReauthorizeHostResponse;
using VerifySessionTokenResponse =
google::internal::remoting::cloud::v1alpha::VerifySessionTokenResponse;
base::TimeDelta fromProtoDuration(const Duration& duration) {
return base::Seconds(duration.seconds()) +
base::Nanoseconds(duration.nanos());
}
class CloudSessionAuthzServiceClient : public SessionAuthzServiceClient {
public:
CloudSessionAuthzServiceClient(
OAuthTokenGetter* oauth_token_getter,
InstanceIdentityTokenGetter* instance_identity_token_getter,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory);
CloudSessionAuthzServiceClient(const CloudSessionAuthzServiceClient&) =
delete;
CloudSessionAuthzServiceClient& operator=(
const CloudSessionAuthzServiceClient&) = delete;
~CloudSessionAuthzServiceClient() override;
// SessionAuthzServiceClient implementation.
void GenerateHostToken(GenerateHostTokenCallback callback) override;
void VerifySessionToken(std::string_view session_token,
VerifySessionTokenCallback callback) override;
void ReauthorizeHost(std::string_view session_reauth_token,
std::string_view session_id,
base::TimeTicks token_expire_time,
ReauthorizeHostCallback callback) override;
private:
// Overloads used to create callbacks for |instance_identity_token_getter_|.
void GenerateHostTokenWithIdToken(GenerateHostTokenCallback callback,
std::string_view instance_identity_token);
void VerifySessionTokenWithIdToken(std::string session_token,
VerifySessionTokenCallback callback,
std::string_view instance_identity_token);
void ReauthorizeHostWithIdToken(std::string session_reauth_token,
std::string session_id,
base::TimeTicks token_expire_time,
ReauthorizeHostCallback callback,
std::string_view instance_identity_token);
void OnGenerateHostTokenResponse(
GenerateHostTokenCallback callback,
const HttpStatus& status,
std::unique_ptr<GenerateHostTokenResponse> response);
void OnVerifySessionTokenResponse(
VerifySessionTokenCallback callback,
const HttpStatus& status,
std::unique_ptr<VerifySessionTokenResponse> response);
void OnReauthorizeHostResponse(
ReauthorizeHostCallback callback,
const HttpStatus& status,
std::unique_ptr<ReauthorizeHostResponse> response);
std::unique_ptr<CloudServiceClient> client_;
const raw_ptr<InstanceIdentityTokenGetter> instance_identity_token_getter_;
base::WeakPtrFactory<CloudSessionAuthzServiceClient> weak_factory_{this};
};
CloudSessionAuthzServiceClient::CloudSessionAuthzServiceClient(
OAuthTokenGetter* oauth_token_getter,
InstanceIdentityTokenGetter* instance_identity_token_getter,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory)
: client_(CloudServiceClient::CreateForChromotingRobotAccount(
oauth_token_getter,
url_loader_factory)),
instance_identity_token_getter_(instance_identity_token_getter) {}
CloudSessionAuthzServiceClient::~CloudSessionAuthzServiceClient() = default;
void CloudSessionAuthzServiceClient::GenerateHostToken(
GenerateHostTokenCallback callback) {
instance_identity_token_getter_->RetrieveToken(base::BindOnce(
&CloudSessionAuthzServiceClient::GenerateHostTokenWithIdToken,
weak_factory_.GetWeakPtr(), std::move(callback)));
}
void CloudSessionAuthzServiceClient::GenerateHostTokenWithIdToken(
GenerateHostTokenCallback callback,
std::string_view instance_identity_token) {
client_->GenerateHostToken(
instance_identity_token,
base::BindOnce(
&CloudSessionAuthzServiceClient::OnGenerateHostTokenResponse,
weak_factory_.GetWeakPtr(), std::move(callback)));
}
void CloudSessionAuthzServiceClient::VerifySessionToken(
std::string_view session_token,
VerifySessionTokenCallback callback) {
instance_identity_token_getter_->RetrieveToken(base::BindOnce(
&CloudSessionAuthzServiceClient::VerifySessionTokenWithIdToken,
weak_factory_.GetWeakPtr(), std::string(session_token),
std::move(callback)));
}
void CloudSessionAuthzServiceClient::VerifySessionTokenWithIdToken(
std::string session_token,
VerifySessionTokenCallback callback,
std::string_view instance_identity_token) {
client_->VerifySessionToken(
session_token, instance_identity_token,
base::BindOnce(
&CloudSessionAuthzServiceClient::OnVerifySessionTokenResponse,
weak_factory_.GetWeakPtr(), std::move(callback)));
}
void CloudSessionAuthzServiceClient::ReauthorizeHost(
std::string_view session_reauth_token,
std::string_view session_id,
base::TimeTicks token_expire_time,
ReauthorizeHostCallback callback) {
instance_identity_token_getter_->RetrieveToken(base::BindOnce(
&CloudSessionAuthzServiceClient::ReauthorizeHostWithIdToken,
weak_factory_.GetWeakPtr(), std::string(session_reauth_token),
std::string(session_id), token_expire_time, std::move(callback)));
}
void CloudSessionAuthzServiceClient::ReauthorizeHostWithIdToken(
std::string session_reauth_token,
std::string session_id,
base::TimeTicks token_expire_time,
ReauthorizeHostCallback callback,
std::string_view instance_identity_token) {
client_->ReauthorizeHost(
session_reauth_token, session_id, instance_identity_token,
GetReauthRetryPolicy(token_expire_time),
base::BindOnce(&CloudSessionAuthzServiceClient::OnReauthorizeHostResponse,
weak_factory_.GetWeakPtr(), std::move(callback)));
}
void CloudSessionAuthzServiceClient::OnGenerateHostTokenResponse(
GenerateHostTokenCallback callback,
const HttpStatus& status,
std::unique_ptr<GenerateHostTokenResponse> response) {
auto response_struct =
std::make_unique<internal::GenerateHostTokenResponseStruct>();
response_struct->host_token = response->host_token();
response_struct->session_id = response->session_id();
std::move(callback).Run(status, std::move(response_struct));
}
void CloudSessionAuthzServiceClient::OnVerifySessionTokenResponse(
VerifySessionTokenCallback callback,
const HttpStatus& status,
std::unique_ptr<VerifySessionTokenResponse> response) {
auto response_struct =
std::make_unique<internal::VerifySessionTokenResponseStruct>();
response_struct->session_id = response->session_id();
response_struct->shared_secret = response->shared_secret();
response_struct->session_reauth_token = response->session_reauth_token();
auto token_lifetime = response->session_reauth_token_lifetime();
response_struct->session_reauth_token_lifetime =
fromProtoDuration(response->session_reauth_token_lifetime());
if (response->has_session_policies()) {
SessionPolicies session_policies;
if (response->session_policies().has_allow_file_transfer()) {
session_policies.allow_file_transfer =
response->session_policies().allow_file_transfer();
}
if (response->session_policies().has_allow_relayed_connections()) {
session_policies.allow_relayed_connections =
response->session_policies().allow_relayed_connections();
}
if (response->session_policies().has_allow_stun_connections()) {
session_policies.allow_stun_connections =
response->session_policies().allow_stun_connections();
}
if (response->session_policies().has_allow_uri_forwarding()) {
session_policies.allow_uri_forwarding =
response->session_policies().allow_uri_forwarding();
}
if (response->session_policies().has_clipboard_size_bytes()) {
session_policies.clipboard_size_bytes =
response->session_policies().clipboard_size_bytes();
}
if (response->session_policies().has_curtain_required()) {
session_policies.curtain_required =
response->session_policies().curtain_required();
}
if (response->session_policies().has_host_udp_port_range()) {
const auto& proto_port_range =
response->session_policies().host_udp_port_range();
int min_port =
proto_port_range.has_start() ? proto_port_range.start() : 1;
int max_port =
proto_port_range.has_end() ? proto_port_range.end() : USHRT_MAX;
if (min_port < 1 || min_port > max_port || max_port > USHRT_MAX) {
LOG(ERROR) << "Invalid port range: [" << min_port << ", " << max_port
<< "]";
} else {
session_policies.host_udp_port_range.min_port = min_port;
session_policies.host_udp_port_range.max_port = max_port;
}
}
response_struct->session_policies.emplace(std::move(session_policies));
}
std::move(callback).Run(status, std::move(response_struct));
}
void CloudSessionAuthzServiceClient::OnReauthorizeHostResponse(
ReauthorizeHostCallback callback,
const HttpStatus& status,
std::unique_ptr<ReauthorizeHostResponse> response) {
auto response_struct =
std::make_unique<internal::ReauthorizeHostResponseStruct>();
response_struct->session_reauth_token = response->session_reauth_token();
response_struct->session_reauth_token_lifetime =
fromProtoDuration(response->session_reauth_token_lifetime());
std::move(callback).Run(status, std::move(response_struct));
}
} // namespace
CloudSessionAuthzServiceClientFactory::CloudSessionAuthzServiceClientFactory(
OAuthTokenGetter* oauth_token_getter,
InstanceIdentityTokenGetter* instance_identity_token_getter,
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory)
: oauth_token_getter_(oauth_token_getter),
instance_identity_token_getter_(instance_identity_token_getter),
url_loader_factory_(url_loader_factory) {}
CloudSessionAuthzServiceClientFactory::
~CloudSessionAuthzServiceClientFactory() = default;
std::unique_ptr<SessionAuthzServiceClient>
CloudSessionAuthzServiceClientFactory::Create() {
return std::make_unique<CloudSessionAuthzServiceClient>(
oauth_token_getter_, instance_identity_token_getter_,
url_loader_factory_);
}
AuthenticationMethod CloudSessionAuthzServiceClientFactory::method() {
return AuthenticationMethod::CLOUD_SESSION_AUTHZ_SPAKE2_CURVE25519;
}
} // namespace remoting
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