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
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/quick_pair/repository/fast_pair/saved_device_registry.h"
#include <string>
#include "ash/quick_pair/common/quick_pair_browser_delegate.h"
#include "base/base64.h"
#include "base/containers/contains.h"
#include "components/cross_device/logging/logging.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "device/bluetooth//bluetooth_adapter.h"
#include "device/bluetooth/bluetooth_device.h"
namespace {
const char kFastPairSavedDevicesPref[] = "fast_pair.saved_devices";
} // namespace
namespace ash {
namespace quick_pair {
SavedDeviceRegistry::SavedDeviceRegistry(
scoped_refptr<device::BluetoothAdapter> adapter)
: adapter_(adapter) {}
SavedDeviceRegistry::~SavedDeviceRegistry() = default;
void SavedDeviceRegistry::RegisterProfilePrefs(PrefRegistrySimple* registry) {
registry->RegisterDictionaryPref(kFastPairSavedDevicesPref);
}
bool SavedDeviceRegistry::SaveAccountAssociation(
const std::string& mac_address,
const std::vector<uint8_t>& account_key) {
PrefService* pref_service =
QuickPairBrowserDelegate::Get()->GetActivePrefService();
if (!pref_service) {
CD_LOG(WARNING, Feature::FP)
<< __func__
<< ": No user pref service available. Failed to write "
"account association to Saved Device Registry.";
return false;
}
std::string encoded = base::Base64Encode(account_key);
ScopedDictPrefUpdate update(pref_service, kFastPairSavedDevicesPref);
update->Set(mac_address, encoded);
CD_LOG(INFO, Feature::FP) << __func__ << ": Saved account key.";
return true;
}
bool SavedDeviceRegistry::DeleteAccountKey(const std::string& mac_address) {
PrefService* pref_service =
QuickPairBrowserDelegate::Get()->GetActivePrefService();
if (!pref_service) {
CD_LOG(WARNING, Feature::FP)
<< __func__ << ": No user pref service available.";
return false;
}
ScopedDictPrefUpdate update(pref_service, kFastPairSavedDevicesPref);
if (!update->Remove(mac_address)) {
CD_LOG(WARNING, Feature::FP)
<< __func__
<< ": Failed to delete mac address -> account key record from prefs";
return false;
}
return true;
}
bool SavedDeviceRegistry::DeleteAccountKey(
const std::vector<uint8_t>& account_key) {
PrefService* pref_service =
QuickPairBrowserDelegate::Get()->GetActivePrefService();
if (!pref_service) {
CD_LOG(WARNING, Feature::FP)
<< __func__ << ": No user pref service available.";
return false;
}
const base::Value::Dict& saved_devices =
pref_service->GetDict(kFastPairSavedDevicesPref);
std::string encoded_key = base::Base64Encode(account_key);
for (const auto it : saved_devices) {
const std::string* value = it.second.GetIfString();
if (value && *value == encoded_key) {
ScopedDictPrefUpdate update(pref_service, kFastPairSavedDevicesPref);
return update->Remove(it.first);
}
}
CD_LOG(WARNING, Feature::FP)
<< __func__
<< ": Failed to delete account key record from prefs: "
"account key not found";
return false;
}
std::optional<const std::vector<uint8_t>> SavedDeviceRegistry::GetAccountKey(
const std::string& mac_address) {
PrefService* pref_service =
QuickPairBrowserDelegate::Get()->GetActivePrefService();
if (!pref_service) {
CD_LOG(WARNING, Feature::FP)
<< __func__ << ": No user pref service available.";
return std::nullopt;
}
const std::string* result = pref_service->GetValue(kFastPairSavedDevicesPref)
.GetDict()
.FindString(mac_address);
if (!result) {
return std::nullopt;
}
std::string decoded;
if (!base::Base64Decode(*result, &decoded)) {
CD_LOG(WARNING, Feature::FP)
<< __func__ << ": Failed to decode the account key from Base64.";
return std::nullopt;
}
return std::vector<uint8_t>(decoded.begin(), decoded.end());
}
bool SavedDeviceRegistry::IsAccountKeySavedToRegistry(
const std::vector<uint8_t>& account_key) {
PrefService* pref_service =
QuickPairBrowserDelegate::Get()->GetActivePrefService();
if (!pref_service) {
CD_LOG(WARNING, Feature::FP)
<< __func__ << ": No user pref service available.";
return false;
}
if (!has_updated_saved_devices_registry_) {
CD_LOG(INFO, Feature::FP)
<< __func__
<< ": checking for changes to the registry by cross checking "
"the adapter before continuing";
RemoveDevicesIfRemovedFromDifferentUser(pref_service);
}
const base::Value::Dict& saved_devices =
pref_service->GetDict(kFastPairSavedDevicesPref);
std::string encoded_key = base::Base64Encode(account_key);
for (const auto it : saved_devices) {
const std::string* value = it.second.GetIfString();
if (value && *value == encoded_key) {
return true;
}
}
return false;
}
void SavedDeviceRegistry::RemoveDevicesIfRemovedFromDifferentUser(
PrefService* pref_service) {
DCHECK(pref_service);
// Set of currently paired devices, stored by Bluetooth address, used to
// cross reference the registry for any devices that need to be removed.
std::set<std::string> paired_devices;
for (device::BluetoothDevice* device : adapter_->GetDevices()) {
if (device->IsPaired()) {
paired_devices.insert(device->GetAddress());
}
}
// Iterate over the list of devices in the registry, and if there are any in
// the registry that are no longer paired to the adapter (determined by mac
// address), remove them from the registry.
const base::Value::Dict& saved_devices =
pref_service->GetDict(kFastPairSavedDevicesPref);
for (const auto it : saved_devices) {
const std::string& mac_address = it.first;
if (!base::Contains(paired_devices, mac_address)) {
ScopedDictPrefUpdate update(pref_service, kFastPairSavedDevicesPref);
update->Remove(it.first);
CD_LOG(VERBOSE, Feature::FP)
<< __func__
<< ": removed device from registry at address= " << mac_address;
}
}
has_updated_saved_devices_registry_ = true;
}
} // namespace quick_pair
} // namespace ash
|
