//
// Copyright (C) 2014 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

#include "attestation/server/dbus_service.h"

#include <memory>
#include <string>

#include <chromeos/bind_lambda.h>
#include <dbus/bus.h>
#include <dbus/object_path.h>

#include "attestation/common/dbus_interface.h"

using chromeos::dbus_utils::DBusMethodResponse;

namespace attestation {

DBusService::DBusService(const scoped_refptr<dbus::Bus>& bus,
                         AttestationInterface* service)
    : dbus_object_(nullptr, bus, dbus::ObjectPath(kAttestationServicePath)),
      service_(service) {
}

void DBusService::Register(const CompletionAction& callback) {
  chromeos::dbus_utils::DBusInterface* dbus_interface =
      dbus_object_.AddOrGetInterface(kAttestationInterface);

  dbus_interface->AddMethodHandler(kCreateGoogleAttestedKey,
                                   base::Unretained(this),
                                   &DBusService::HandleCreateGoogleAttestedKey);
  dbus_interface->AddMethodHandler(kGetKeyInfo,
                                   base::Unretained(this),
                                   &DBusService::HandleGetKeyInfo);
  dbus_interface->AddMethodHandler(kGetEndorsementInfo,
                                   base::Unretained(this),
                                   &DBusService::HandleGetEndorsementInfo);
  dbus_interface->AddMethodHandler(kGetAttestationKeyInfo,
                                   base::Unretained(this),
                                   &DBusService::HandleGetAttestationKeyInfo);
  dbus_interface->AddMethodHandler(kActivateAttestationKey,
                                   base::Unretained(this),
                                   &DBusService::HandleActivateAttestationKey);
  dbus_interface->AddMethodHandler(kCreateCertifiableKey,
                                   base::Unretained(this),
                                   &DBusService::HandleCreateCertifiableKey);
  dbus_interface->AddMethodHandler(kDecrypt,
                                   base::Unretained(this),
                                   &DBusService::HandleDecrypt);
  dbus_interface->AddMethodHandler(kSign,
                                   base::Unretained(this),
                                   &DBusService::HandleSign);
  dbus_interface->AddMethodHandler(
      kRegisterKeyWithChapsToken,
      base::Unretained(this),
      &DBusService::HandleRegisterKeyWithChapsToken);

  dbus_object_.RegisterAsync(callback);
}

void DBusService::HandleCreateGoogleAttestedKey(
    std::unique_ptr<DBusMethodResponse<const CreateGoogleAttestedKeyReply&>>
        response,
    const CreateGoogleAttestedKeyRequest& request) {
  VLOG(1) << __func__;
  // Convert |response| to a shared_ptr so |service_| can safely copy the
  // callback.
  using SharedResponsePointer = std::shared_ptr<
      DBusMethodResponse<const CreateGoogleAttestedKeyReply&>>;
  // A callback that fills the reply protobuf and sends it.
  auto callback = [](const SharedResponsePointer& response,
                     const CreateGoogleAttestedKeyReply& reply) {
    response->Return(reply);
  };
  service_->CreateGoogleAttestedKey(
      request,
      base::Bind(callback, SharedResponsePointer(std::move(response))));
}

void DBusService::HandleGetKeyInfo(
    std::unique_ptr<DBusMethodResponse<const GetKeyInfoReply&>> response,
    const GetKeyInfoRequest& request) {
  VLOG(1) << __func__;
  // Convert |response| to a shared_ptr so |service_| can safely copy the
  // callback.
  using SharedResponsePointer = std::shared_ptr<
      DBusMethodResponse<const GetKeyInfoReply&>>;
  // A callback that fills the reply protobuf and sends it.
  auto callback = [](const SharedResponsePointer& response,
                     const GetKeyInfoReply& reply) {
    response->Return(reply);
  };
  service_->GetKeyInfo(
      request,
      base::Bind(callback, SharedResponsePointer(std::move(response))));
}

void DBusService::HandleGetEndorsementInfo(
    std::unique_ptr<DBusMethodResponse<const GetEndorsementInfoReply&>>
        response,
    const GetEndorsementInfoRequest& request) {
  VLOG(1) << __func__;
  // Convert |response| to a shared_ptr so |service_| can safely copy the
  // callback.
  using SharedResponsePointer = std::shared_ptr<
      DBusMethodResponse<const GetEndorsementInfoReply&>>;
  // A callback that fills the reply protobuf and sends it.
  auto callback = [](const SharedResponsePointer& response,
                     const GetEndorsementInfoReply& reply) {
    response->Return(reply);
  };
  service_->GetEndorsementInfo(
      request,
      base::Bind(callback, SharedResponsePointer(std::move(response))));
}

void DBusService::HandleGetAttestationKeyInfo(
    std::unique_ptr<DBusMethodResponse<const GetAttestationKeyInfoReply&>>
        response,
    const GetAttestationKeyInfoRequest& request) {
  VLOG(1) << __func__;
  // Convert |response| to a shared_ptr so |service_| can safely copy the
  // callback.
  using SharedResponsePointer = std::shared_ptr<
      DBusMethodResponse<const GetAttestationKeyInfoReply&>>;
  // A callback that fills the reply protobuf and sends it.
  auto callback = [](const SharedResponsePointer& response,
                     const GetAttestationKeyInfoReply& reply) {
    response->Return(reply);
  };
  service_->GetAttestationKeyInfo(
      request,
      base::Bind(callback, SharedResponsePointer(std::move(response))));
}

void DBusService::HandleActivateAttestationKey(
    std::unique_ptr<DBusMethodResponse<const ActivateAttestationKeyReply&>>
        response,
    const ActivateAttestationKeyRequest& request) {
  VLOG(1) << __func__;
  // Convert |response| to a shared_ptr so |service_| can safely copy the
  // callback.
  using SharedResponsePointer = std::shared_ptr<
      DBusMethodResponse<const ActivateAttestationKeyReply&>>;
  // A callback that fills the reply protobuf and sends it.
  auto callback = [](const SharedResponsePointer& response,
                     const ActivateAttestationKeyReply& reply) {
    response->Return(reply);
  };
  service_->ActivateAttestationKey(
      request,
      base::Bind(callback, SharedResponsePointer(std::move(response))));
}

void DBusService::HandleCreateCertifiableKey(
    std::unique_ptr<DBusMethodResponse<const CreateCertifiableKeyReply&>>
        response,
    const CreateCertifiableKeyRequest& request) {
  VLOG(1) << __func__;
  // Convert |response| to a shared_ptr so |service_| can safely copy the
  // callback.
  using SharedResponsePointer = std::shared_ptr<
      DBusMethodResponse<const CreateCertifiableKeyReply&>>;
  // A callback that fills the reply protobuf and sends it.
  auto callback = [](const SharedResponsePointer& response,
                     const CreateCertifiableKeyReply& reply) {
    response->Return(reply);
  };
  service_->CreateCertifiableKey(
      request,
      base::Bind(callback, SharedResponsePointer(std::move(response))));
}

void DBusService::HandleDecrypt(
    std::unique_ptr<DBusMethodResponse<const DecryptReply&>> response,
    const DecryptRequest& request) {
  VLOG(1) << __func__;
  // Convert |response| to a shared_ptr so |service_| can safely copy the
  // callback.
  using SharedResponsePointer = std::shared_ptr<
      DBusMethodResponse<const DecryptReply&>>;
  // A callback that fills the reply protobuf and sends it.
  auto callback = [](const SharedResponsePointer& response,
                     const DecryptReply& reply) {
    response->Return(reply);
  };
  service_->Decrypt(
      request,
      base::Bind(callback, SharedResponsePointer(std::move(response))));
}

void DBusService::HandleSign(
    std::unique_ptr<DBusMethodResponse<const SignReply&>> response,
    const SignRequest& request) {
  VLOG(1) << __func__;
  // Convert |response| to a shared_ptr so |service_| can safely copy the
  // callback.
  using SharedResponsePointer = std::shared_ptr<
      DBusMethodResponse<const SignReply&>>;
  // A callback that fills the reply protobuf and sends it.
  auto callback = [](const SharedResponsePointer& response,
                     const SignReply& reply) {
    response->Return(reply);
  };
  service_->Sign(
      request,
      base::Bind(callback, SharedResponsePointer(std::move(response))));
}

void DBusService::HandleRegisterKeyWithChapsToken(
    std::unique_ptr<DBusMethodResponse<const RegisterKeyWithChapsTokenReply&>>
        response,
    const RegisterKeyWithChapsTokenRequest& request) {
  VLOG(1) << __func__;
  // Convert |response| to a shared_ptr so |service_| can safely copy the
  // callback.
  using SharedResponsePointer = std::shared_ptr<
      DBusMethodResponse<const RegisterKeyWithChapsTokenReply&>>;
  // A callback that fills the reply protobuf and sends it.
  auto callback = [](const SharedResponsePointer& response,
                     const RegisterKeyWithChapsTokenReply& reply) {
    response->Return(reply);
  };
  service_->RegisterKeyWithChapsToken(
      request,
      base::Bind(callback, SharedResponsePointer(std::move(response))));
}

}  // namespace attestation