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
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
// Copyright 2014 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 EXTENSIONS_DEVICE_PERMISSION_MANAGER_H_
#define EXTENSIONS_DEVICE_PERMISSION_MANAGER_H_
#include <stdint.h>
#include <map>
#include <set>
#include <vector>
#include "base/gtest_prod_util.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/scoped_observer.h"
#include "base/strings/string16.h"
#include "base/threading/thread_checker.h"
#include "components/keyed_service/content/browser_context_keyed_service_factory.h"
#include "components/keyed_service/core/keyed_service.h"
#include "device/hid/hid_service.h"
#include "device/usb/usb_service.h"
namespace base {
template <typename T>
struct DefaultSingletonTraits;
class Value;
}
namespace content {
class BrowserContext;
}
namespace extensions {
// Stores information about a device saved with access granted.
class DevicePermissionEntry : public base::RefCounted<DevicePermissionEntry> {
public:
enum class Type {
USB,
HID,
};
DevicePermissionEntry(scoped_refptr<device::UsbDevice> device);
DevicePermissionEntry(scoped_refptr<device::HidDeviceInfo> device);
DevicePermissionEntry(Type type,
uint16_t vendor_id,
uint16_t product_id,
const base::string16& serial_number,
const base::string16& manufacturer_string,
const base::string16& product_string,
const base::Time& last_used);
// A persistent device is one that can be recognized when it is reconnected
// and can therefore be remembered persistently by writing information about
// it to ExtensionPrefs. Currently this means it has a serial number string.
bool IsPersistent() const;
// Convert the device to a serializable value, returns a null pointer if the
// entry is not persistent.
scoped_ptr<base::Value> ToValue() const;
base::string16 GetPermissionMessageString() const;
Type type() const { return type_; }
uint16_t vendor_id() const { return vendor_id_; }
uint16_t product_id() const { return product_id_; }
const base::string16& serial_number() const { return serial_number_; }
const base::Time& last_used() const { return last_used_; }
base::string16 GetManufacturer() const;
base::string16 GetProduct() const;
private:
friend class base::RefCounted<DevicePermissionEntry>;
friend class DevicePermissionsManager;
~DevicePermissionEntry();
void set_last_used(const base::Time& last_used) { last_used_ = last_used; }
// The USB device tracked by this entry. Will be nullptr if this entry was
// restored from ExtensionPrefs or type_ is not Type::USB.
scoped_refptr<device::UsbDevice> usb_device_;
// The HID device tracked by this entry. Will be nullptr if this entry was
// restored from ExtensionPrefs or type_ is not Type::HID.
scoped_refptr<device::HidDeviceInfo> hid_device_;
// The type of device this entry represents.
Type type_;
// The vendor ID of this device.
uint16_t vendor_id_;
// The product ID of this device.
uint16_t product_id_;
// The serial number (possibly alphanumeric) of this device.
base::string16 serial_number_;
// The manufacturer string read from the device (optional).
base::string16 manufacturer_string_;
// The product string read from the device (optional).
base::string16 product_string_;
// The last time this device was used by the extension.
base::Time last_used_;
};
// Stores device permissions associated with a particular extension.
class DevicePermissions {
public:
virtual ~DevicePermissions();
// Attempts to find a permission entry matching the given device.
scoped_refptr<DevicePermissionEntry> FindUsbDeviceEntry(
scoped_refptr<device::UsbDevice> device) const;
scoped_refptr<DevicePermissionEntry> FindHidDeviceEntry(
scoped_refptr<device::HidDeviceInfo> device) const;
const std::set<scoped_refptr<DevicePermissionEntry>>& entries() const {
return entries_;
}
private:
friend class DevicePermissionsManager;
// Reads permissions out of ExtensionPrefs.
DevicePermissions(content::BrowserContext* context,
const std::string& extension_id);
std::set<scoped_refptr<DevicePermissionEntry>> entries_;
std::map<device::UsbDevice*, scoped_refptr<DevicePermissionEntry>>
ephemeral_usb_devices_;
std::map<device::HidDeviceInfo*, scoped_refptr<DevicePermissionEntry>>
ephemeral_hid_devices_;
DISALLOW_COPY_AND_ASSIGN(DevicePermissions);
};
// Manages saved device permissions for all extensions.
class DevicePermissionsManager : public KeyedService,
public device::UsbService::Observer,
public device::HidService::Observer {
public:
static DevicePermissionsManager* Get(content::BrowserContext* context);
static base::string16 GetPermissionMessage(
uint16_t vendor_id,
uint16_t product_id,
const base::string16& manufacturer_string,
const base::string16& product_string,
const base::string16& serial_number,
bool always_include_manufacturer);
// The DevicePermissions object for a given extension.
DevicePermissions* GetForExtension(const std::string& extension_id);
// Equivalent to calling GetForExtension and extracting the permission string
// for each entry.
std::vector<base::string16> GetPermissionMessageStrings(
const std::string& extension_id) const;
void AllowUsbDevice(const std::string& extension_id,
scoped_refptr<device::UsbDevice> device);
void AllowHidDevice(const std::string& extension_id,
scoped_refptr<device::HidDeviceInfo> device);
// Updates the "last used" timestamp on the given device entry and writes it
// out to ExtensionPrefs.
void UpdateLastUsed(const std::string& extension_id,
scoped_refptr<DevicePermissionEntry> entry);
// Revokes permission for the extension to access the given device.
void RemoveEntry(const std::string& extension_id,
scoped_refptr<DevicePermissionEntry> entry);
// Revokes permission for the extension to access all allowed devices.
void Clear(const std::string& extension_id);
private:
friend class DevicePermissionsManagerFactory;
FRIEND_TEST_ALL_PREFIXES(DevicePermissionsManagerTest, SuspendExtension);
DevicePermissionsManager(content::BrowserContext* context);
~DevicePermissionsManager() override;
DevicePermissions* GetInternal(const std::string& extension_id) const;
// UsbService::Observer implementation
void OnDeviceRemovedCleanup(scoped_refptr<device::UsbDevice> device) override;
// HidService::Observer implementation
void OnDeviceRemovedCleanup(
scoped_refptr<device::HidDeviceInfo> device) override;
base::ThreadChecker thread_checker_;
content::BrowserContext* context_;
std::map<std::string, DevicePermissions*> extension_id_to_device_permissions_;
ScopedObserver<device::UsbService, device::UsbService::Observer>
usb_service_observer_;
ScopedObserver<device::HidService, device::HidService::Observer>
hid_service_observer_;
DISALLOW_COPY_AND_ASSIGN(DevicePermissionsManager);
};
class DevicePermissionsManagerFactory
: public BrowserContextKeyedServiceFactory {
public:
static DevicePermissionsManager* GetForBrowserContext(
content::BrowserContext* context);
static DevicePermissionsManagerFactory* GetInstance();
private:
friend struct base::DefaultSingletonTraits<DevicePermissionsManagerFactory>;
DevicePermissionsManagerFactory();
~DevicePermissionsManagerFactory() override;
// BrowserContextKeyedServiceFactory implementation
KeyedService* BuildServiceInstanceFor(
content::BrowserContext* context) const override;
content::BrowserContext* GetBrowserContextToUse(
content::BrowserContext* context) const override;
DISALLOW_COPY_AND_ASSIGN(DevicePermissionsManagerFactory);
};
} // namespace extensions
#endif // EXTENSIONS_DEVICE_PERMISSION_MANAGER_H_
|
