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// Copyright 2015 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.
#ifndef COMPONENTS_CRYPTAUTH_CRYPTAUTH_ENROLLER_IMPL_H_
#define COMPONENTS_CRYPTAUTH_CRYPTAUTH_ENROLLER_IMPL_H_
#include <memory>
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "components/cryptauth/cryptauth_enroller.h"
#include "components/cryptauth/proto/cryptauth_api.pb.h"
namespace cryptauth {
class CryptAuthClient;
class CryptAuthClientFactory;
class SecureMessageDelegate;
// Implementation of CryptAuthEnroller to perform enrollment in two steps:
// 1. SetupEnrollment:
// Obtain a session public key from CryptAuth used to encrypt enrollment
// data. Generate an ephemeral public key and derive a session symmetric
// key.
// 2. FinishEnrollment:
// Encrypt the enrollment data with the session symmetric key, and send the
// payload and device's public key to CryptAuth.
class CryptAuthEnrollerImpl : public CryptAuthEnroller {
public:
// |client_factory| creates CryptAuthClient instances for making API calls.
// |crypto_delegate| is responsible for SecureMessage operations.
CryptAuthEnrollerImpl(
std::unique_ptr<CryptAuthClientFactory> client_factory,
std::unique_ptr<SecureMessageDelegate> secure_message_delegate);
~CryptAuthEnrollerImpl() override;
// CryptAuthEnroller:
void Enroll(const std::string& user_public_key,
const std::string& user_private_key,
const GcmDeviceInfo& device_info,
InvocationReason invocation_reason,
const EnrollmentFinishedCallback& callback) override;
private:
// Callbacks for SetupEnrollment.
void OnSetupEnrollmentSuccess(
const SetupEnrollmentResponse& response);
void OnSetupEnrollmentFailure(const std::string& error);
// Callbacks for FinishEnrollment.
void OnFinishEnrollmentSuccess(
const FinishEnrollmentResponse& response);
void OnFinishEnrollmentFailure(const std::string& error);
// Callbacks for SecureMessageDelegate operations.
void OnKeyPairGenerated(const std::string& public_key,
const std::string& private_key);
void OnKeyDerived(const std::string& symmetric_key);
void OnInnerSecureMessageCreated(const std::string& inner_message);
void OnOuterSecureMessageCreated(const std::string& outer_message);
// Creates the CryptAuthClient instances to make API requests.
std::unique_ptr<CryptAuthClientFactory> client_factory_;
// Handles SecureMessage operations.
std::unique_ptr<SecureMessageDelegate> secure_message_delegate_;
// The CryptAuthClient for the latest request.
std::unique_ptr<CryptAuthClient> cryptauth_client_;
// The ephemeral key-pair generated for a single enrollment.
std::string session_public_key_;
std::string session_private_key_;
// The user's persistent key-pair identifying the local device.
std::string user_public_key_;
std::string user_private_key_;
// Contains information of the device to enroll.
GcmDeviceInfo device_info_;
// The reason telling the server why the enrollment happened.
InvocationReason invocation_reason_;
// The setup information returned from the SetupEnrollment API call.
SetupEnrollmentInfo setup_info_;
// Callback invoked when the enrollment is done.
EnrollmentFinishedCallback callback_;
// The derived ephemeral symmetric key.
std::string symmetric_key_;
base::WeakPtrFactory<CryptAuthEnrollerImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(CryptAuthEnrollerImpl);
};
} // namespace cryptauth
#endif // COMPONENTS_CRYPTAUTH_CRYPTAUTH_ENROLLER_IMPL_H_
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