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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/corp_session_authz_service_client.h"
#include <memory>
#include <utility>
#include "base/functional/bind.h"
#include "base/strings/strcat.h"
#include "net/traffic_annotation/network_traffic_annotation.h"
#include "remoting/base/internal_headers.h"
#include "remoting/base/protobuf_http_request.h"
#include "remoting/base/protobuf_http_request_config.h"
#include "remoting/base/service_urls.h"
#include "remoting/proto/session_authz_service.h"
namespace remoting {
namespace {
template <typename Type>
using ResponseCallback =
base::OnceCallback<void(const HttpStatus&, std::unique_ptr<Type>)>;
template <typename ProtoType, typename StructType>
using ConversionFunction = std::unique_ptr<StructType> (*)(const ProtoType&);
// Creates a callback that takes a response of `ProtoType`, which, upon
// invocation, converts it to a response of `StructType` by calling
// `conversion_function`, then calls `struct_callback`
template <typename ProtoType, typename StructType>
ResponseCallback<ProtoType> ConvertCallback(
ResponseCallback<StructType> struct_callback,
ConversionFunction<ProtoType, StructType> conversion_function) {
return base::BindOnce(
[](ResponseCallback<StructType> struct_callback,
ConversionFunction<ProtoType, StructType> conversion_function,
const HttpStatus& status, std::unique_ptr<ProtoType> proto_type) {
std::move(struct_callback)
.Run(status,
proto_type ? conversion_function(*proto_type) : nullptr);
},
std::move(struct_callback), conversion_function);
}
} // namespace
CorpSessionAuthzServiceClient::CorpSessionAuthzServiceClient(
scoped_refptr<network::SharedURLLoaderFactory> url_loader_factory,
std::unique_ptr<net::ClientCertStore> client_cert_store,
std::unique_ptr<OAuthTokenGetter> oauth_token_getter,
std::string_view support_id)
: oauth_token_getter_(std::move(oauth_token_getter)),
http_client_(ServiceUrls::GetInstance()->remoting_corp_endpoint(),
oauth_token_getter_.get(),
url_loader_factory,
std::move(client_cert_store)),
support_id_(support_id) {
session_authz_path_ = support_id.empty()
? internal::GetRemoteAccessSessionAuthzPath()
: internal::GetRemoteSupportSessionAuthzPath();
}
CorpSessionAuthzServiceClient::~CorpSessionAuthzServiceClient() = default;
void CorpSessionAuthzServiceClient::GenerateHostToken(
GenerateHostTokenCallback callback) {
constexpr net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation(
"remoting_corp_session_authz_generate_host_token",
R"(
semantics {
sender: "Chrome Remote Desktop"
description:
"Generates a host token to be used to authorize a Chrome Remote "
"Desktop connection from a corp user to a corp-managed device "
"(this device)."
trigger:
"Corp user connects to a corp-managed machine. Note that this "
"functionality is not available outside of the corp network so "
"external users will never see this request being made."
user_data {
type: ACCESS_TOKEN
}
data:
"Access token of the Chrome Remote Desktop host's robot account."
destination: GOOGLE_OWNED_SERVICE
internal {
contacts { owners: "//remoting/OWNERS" }
}
last_reviewed: "2024-02-01"
}
policy {
cookies_allowed: NO
setting:
"This request cannot be stopped in settings, but will not be sent "
"if the Chrome Remote Desktop host is not registered on a "
"corp-managed device."
policy_exception_justification:
"Not implemented."
})");
ExecuteRequest(
traffic_annotation, internal::GetGenerateHostTokenRequestVerb(),
internal::GetGenerateHostTokenRequest({.support_id = support_id_}),
ConvertCallback(std::move(callback),
&internal::GetGenerateHostTokenResponseStruct));
}
void CorpSessionAuthzServiceClient::VerifySessionToken(
std::string_view session_token,
VerifySessionTokenCallback callback) {
constexpr net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation(
"remoting_corp_session_authz_verify_session_token",
R"(
semantics {
sender: "Chrome Remote Desktop"
description:
"Verifies a session token returned by the client device and "
"decodes the shared secret from the session token, to be used to "
"authorize a Chrome Remote Desktop connection from a corp user to "
"a corp-managed device (this device)."
trigger:
"Corp user connects to a corp-managed machine. Note that this "
"functionality is not available outside of the corp network so "
"external users will never see this request being made."
user_data {
type: ACCESS_TOKEN
}
data:
"Access token of the Chrome Remote Desktop host's robot account, "
"session token returned by the Chrome Remote Desktop client."
destination: GOOGLE_OWNED_SERVICE
internal {
contacts { owners: "//remoting/OWNERS" }
}
last_reviewed: "2024-02-01"
}
policy {
cookies_allowed: NO
setting:
"This request cannot be stopped in settings, but will not be sent "
"if the Chrome Remote Desktop host is not registered on a "
"corp-managed device."
policy_exception_justification:
"Not implemented."
})");
internal::VerifySessionTokenRequestStruct request;
request.session_token = session_token;
request.support_id = support_id_;
ExecuteRequest(
traffic_annotation, internal::GetVerifySessionTokenRequestVerb(),
internal::GetVerifySessionTokenRequest(request),
ConvertCallback(std::move(callback),
&internal::GetVerifySessionTokenResponseStruct));
}
void CorpSessionAuthzServiceClient::ReauthorizeHost(
std::string_view session_reauth_token,
std::string_view session_id,
base::TimeTicks token_expire_time,
ReauthorizeHostCallback callback) {
constexpr net::NetworkTrafficAnnotationTag traffic_annotation =
net::DefineNetworkTrafficAnnotation(
"remoting_corp_session_reauthorize_host",
R"(
semantics {
sender: "Chrome Remote Desktop"
description:
"Reauthorizes the current Chrome Remote Desktop connection, "
"initiated by a corp user."
trigger:
"Corp user connects to a corp-managed machine. Note that this "
"functionality is not available outside of the corp network so "
"external users will never see this request being made."
user_data {
type: ACCESS_TOKEN
}
data:
"Access token of the Chrome Remote Desktop host's robot account, "
"session token returned by the Chrome Remote Desktop client."
destination: GOOGLE_OWNED_SERVICE
internal {
contacts { owners: "//remoting/OWNERS" }
}
last_reviewed: "2024-02-01"
}
policy {
cookies_allowed: NO
setting:
"This request cannot be stopped in settings, but will not be sent "
"if the Chrome Remote Desktop host is not registered on a "
"corp-managed device."
policy_exception_justification:
"Not implemented."
})");
internal::ReauthorizeHostRequestStruct request;
request.session_reauth_token = session_reauth_token;
request.session_id = session_id;
request.support_id = support_id_;
ExecuteRequest(traffic_annotation, internal::GetReauthorizeHostRequestVerb(),
internal::GetReauthorizeHostRequest(request),
ConvertCallback(std::move(callback),
&internal::GetReauthorizeHostResponseStruct),
GetReauthRetryPolicy(token_expire_time));
}
template <typename CallbackType>
void CorpSessionAuthzServiceClient::ExecuteRequest(
const net::NetworkTrafficAnnotationTag& traffic_annotation,
std::string_view verb,
std::unique_ptr<google::protobuf::MessageLite> request_message,
CallbackType callback,
scoped_refptr<const ProtobufHttpRequestConfig::RetryPolicy> retry_policy) {
auto request_config =
std::make_unique<ProtobufHttpRequestConfig>(traffic_annotation);
request_config->path = base::StrCat({session_authz_path_, ":", verb});
request_config->api_key = internal::GetRemotingCorpApiKey();
request_config->authenticated = true;
request_config->provide_certificate = true;
request_config->request_message = std::move(request_message);
request_config->retry_policy = std::move(retry_policy);
auto request =
std::make_unique<ProtobufHttpRequest>(std::move(request_config));
request->SetResponseCallback(std::move(callback));
http_client_.ExecuteRequest(std::move(request));
}
} // namespace remoting
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