chromeos/components/multidevice/fake_secure_message_delegate.h

// 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 CHROMEOS_COMPONENTS_MULTIDEVICE_FAKE_SECURE_MESSAGE_DELEGATE_H_
#define CHROMEOS_COMPONENTS_MULTIDEVICE_FAKE_SECURE_MESSAGE_DELEGATE_H_

#include <memory>

#include "base/macros.h"
#include "chromeos/components/multidevice/secure_message_delegate.h"
#include "chromeos/components/multidevice/secure_message_delegate_impl.h"

namespace chromeos {

namespace multidevice {

// Fake implementation of SecureMessageDelegate used in tests.
// For clarity in tests, all functions in this delegate will invoke their
// callback with the result before returning.
class FakeSecureMessageDelegate : public SecureMessageDelegate {
 public:
  FakeSecureMessageDelegate();
  ~FakeSecureMessageDelegate() override;

  // SecureMessageDelegate:
  void GenerateKeyPair(const GenerateKeyPairCallback& callback) override;
  void DeriveKey(const std::string& private_key,
                 const std::string& public_key,
                 const DeriveKeyCallback& callback) override;
  void CreateSecureMessage(
      const std::string& payload,
      const std::string& key,
      const CreateOptions& create_options,
      const CreateSecureMessageCallback& callback) override;
  void UnwrapSecureMessage(
      const std::string& serialized_message,
      const std::string& key,
      const UnwrapOptions& unwrap_options,
      const UnwrapSecureMessageCallback& callback) override;

  // Returns the corresponding private key for the given |public_key|.
  std::string GetPrivateKeyForPublicKey(const std::string& public_key);

  // Sets the next public key to be returned by GenerateKeyPair(). The
  // corresponding private key will be derived from this public key.
  void set_next_public_key(const std::string& public_key) {
    next_public_key_ = public_key;
  }

 private:
  std::string next_public_key_;

  DISALLOW_COPY_AND_ASSIGN(FakeSecureMessageDelegate);
};

class FakeSecureMessageDelegateFactory
    : public multidevice::SecureMessageDelegateImpl::Factory {
 public:
  FakeSecureMessageDelegateFactory() = default;
  ~FakeSecureMessageDelegateFactory() override = default;

  multidevice::FakeSecureMessageDelegate* instance() { return instance_; }

 private:
  // multidevice::SecureMessageDelegateImpl::Factory:
  std::unique_ptr<multidevice::SecureMessageDelegate> CreateInstance() override;

  multidevice::FakeSecureMessageDelegate* instance_ = nullptr;

  DISALLOW_COPY_AND_ASSIGN(FakeSecureMessageDelegateFactory);
};

}  // namespace multidevice

}  // namespace chromeos

#endif  // CHROMEOS_COMPONENTS_MULTIDEVICE_FAKE_SECURE_MESSAGE_DELEGATE_H_