1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
// 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_PROXIMITY_AUTH_REMOTE_DEVICE_LIFE_CYCLE_IMPL_H
#define COMPONENTS_PROXIMITY_AUTH_REMOTE_DEVICE_LIFE_CYCLE_IMPL_H
#include <memory>
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/observer_list.h"
#include "base/timer/timer.h"
#include "components/cryptauth/bluetooth_throttler.h"
#include "components/cryptauth/connection.h"
#include "components/cryptauth/connection_finder.h"
#include "components/cryptauth/remote_device.h"
#include "components/proximity_auth/authenticator.h"
#include "components/proximity_auth/messenger_observer.h"
#include "components/proximity_auth/remote_device_life_cycle.h"
namespace proximity_auth {
class Messenger;
class ProximityAuthClient;
class SecureContext;
// Implementation of RemoteDeviceLifeCycle.
class RemoteDeviceLifeCycleImpl : public RemoteDeviceLifeCycle,
public MessengerObserver {
public:
// Creates the life cycle for controlling the given |remote_device|.
// |proximity_auth_client| is not owned.
RemoteDeviceLifeCycleImpl(const cryptauth::RemoteDevice& remote_device,
ProximityAuthClient* proximity_auth_client);
~RemoteDeviceLifeCycleImpl() override;
// RemoteDeviceLifeCycle:
void Start() override;
cryptauth::RemoteDevice GetRemoteDevice() const override;
RemoteDeviceLifeCycle::State GetState() const override;
Messenger* GetMessenger() override;
void AddObserver(Observer* observer) override;
void RemoveObserver(Observer* observer) override;
protected:
// Creates and returns a cryptauth::ConnectionFinder instance for
// |remote_device_|.
// Exposed for testing.
virtual std::unique_ptr<cryptauth::ConnectionFinder> CreateConnectionFinder();
// Creates and returns an Authenticator instance for |connection_|.
// Exposed for testing.
virtual std::unique_ptr<Authenticator> CreateAuthenticator();
private:
// Transitions to |new_state|, and notifies observers.
void TransitionToState(RemoteDeviceLifeCycle::State new_state);
// Transtitions to FINDING_CONNECTION state. Creates and starts
// |connection_finder_|.
void FindConnection();
// Called when |connection_finder_| finds a connection.
void OnConnectionFound(std::unique_ptr<cryptauth::Connection> connection);
// Callback when |authenticator_| completes authentication.
void OnAuthenticationResult(Authenticator::Result result,
std::unique_ptr<SecureContext> secure_context);
// Creates the messenger which parses status updates.
void CreateMessenger();
// MessengerObserver:
void OnDisconnected() override;
// The remote device being controlled.
const cryptauth::RemoteDevice remote_device_;
// Used to grab dependencies in chrome. Not owned.
ProximityAuthClient* proximity_auth_client_;
// The current state in the life cycle.
RemoteDeviceLifeCycle::State state_;
// Observers added to the life cycle. Configured as NOTIFY_EXISTING_ONLY.
base::ObserverList<Observer> observers_;
// The connection that is established by |connection_finder_|.
std::unique_ptr<cryptauth::Connection> connection_;
// Context for encrypting and decrypting messages. Created after
// authentication succeeds. Ownership is eventually passed to |messenger_|.
std::unique_ptr<SecureContext> secure_context_;
// The messenger for sending and receiving messages in the
// SECURE_CHANNEL_ESTABLISHED state.
std::unique_ptr<Messenger> messenger_;
// Authenticates the remote device after it is connected. Used in the
// AUTHENTICATING state.
std::unique_ptr<Authenticator> authenticator_;
// Used in the FINDING_CONNECTION state to establish a connection to the
// remote device.
std::unique_ptr<cryptauth::ConnectionFinder> connection_finder_;
// Rate limits Bluetooth connections to the same device. Used to in the
// created cryptauth::ConnectionFinder.
std::unique_ptr<cryptauth::BluetoothThrottler> bluetooth_throttler_;
// After authentication fails, this timer waits for a period of time before
// retrying the connection.
base::OneShotTimer authentication_recovery_timer_;
base::WeakPtrFactory<RemoteDeviceLifeCycleImpl> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(RemoteDeviceLifeCycleImpl);
};
} // namespace proximity_auth
#endif // COMPONENTS_PROXIMITY_AUTH_REMOTE_DEVICE_LIFE_CYCLE_IMPL_H
|
