/
location_control.go
256 lines (216 loc) · 7.33 KB
/
location_control.go
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
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016-2017 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package builtin
import (
"strings"
"github.com/snapcore/snapd/interfaces"
"github.com/snapcore/snapd/interfaces/apparmor"
"github.com/snapcore/snapd/interfaces/dbus"
"github.com/snapcore/snapd/snap"
)
const locationControlSummary = `allows operating as the location service`
const locationControlBaseDeclarationSlots = `
location-control:
allow-installation:
slot-snap-type:
- app
deny-connection: true
deny-auto-connection: true
`
const locationControlPermanentSlotAppArmor = `
# Description: Allow operating as the location service. This gives privileged
# access to the system.
# DBus accesses
#include <abstractions/dbus-strict>
dbus (send)
bus=system
path=/org/freedesktop/DBus
interface=org.freedesktop.DBus
member="{Request,Release}Name"
peer=(name=org.freedesktop.DBus, label=unconfined),
dbus (send)
bus=system
path=/org/freedesktop/DBus
interface=org.freedesktop.DBus
member="GetConnectionUnix{ProcessID,User}"
peer=(label=unconfined),
# Allow binding the service to the requested connection name
dbus (bind)
bus=system
name="com.ubuntu.location.Service",
dbus (receive, send)
bus=system
path=/com/ubuntu/location/Service{,/**}
interface=org.freedesktop.DBus**
peer=(label=unconfined),
`
const locationControlConnectedSlotAppArmor = `
# Allow connected clients to interact with the service
# Allow clients to register providers
dbus (receive)
bus=system
path=/com/ubuntu/location/Service
interface=com.ubuntu.location.Service
member="AddProvider"
peer=(label=###PLUG_SECURITY_TAGS###),
dbus (send)
bus=system
path=/providers/{,**}
interface=com.ubuntu.location.Service.Provider
member="{Satisfies,Enable,Disable,Activate,Deactivate,OnNewEvent}"
peer=(label=###PLUG_SECURITY_TAGS###),
dbus (send)
bus=system
path=/providers/{,**}
interface=org.freedesktop.DBus.Properties
member="{Get,Set}"
peer=(label=###PLUG_SECURITY_TAGS###),
dbus (receive)
bus=system
path=/providers/{,**}
interface=org.freedesktop.DBus.Properties
member="PropertiesChanged"
peer=(label=###PLUG_SECURITY_TAGS###),
# Allow clients to query/modify service properties
dbus (receive)
bus=system
path=/com/ubuntu/location/Service
interface=org.freedesktop.DBus.Properties
member="{Get,Set}"
peer=(label=###PLUG_SECURITY_TAGS###),
dbus (send)
bus=system
path=/com/ubuntu/location/Service
interface=org.freedesktop.DBus.Properties
member=PropertiesChanged
peer=(label=###PLUG_SECURITY_TAGS###),
`
const locationControlConnectedPlugAppArmor = `
# Description: Allow using location service. This gives privileged access to
# the service.
#include <abstractions/dbus-strict>
# Allow clients to register providers
dbus (send)
bus=system
path=/com/ubuntu/location/Service
interface=com.ubuntu.location.Service
member="AddProvider"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (receive)
bus=system
path=/providers/{,**}
interface=com.ubuntu.location.Service.Provider
member="{Satisfies,Enable,Disable,Activate,Deactivate,OnNewEvent}"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (receive)
bus=system
path=/providers/{,**}
interface=org.freedesktop.DBus.Properties
member="PropertiesChanged"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (send)
bus=system
path=/providers/{,**}
interface=org.freedesktop.DBus.Properties
member="PropertiesChanged"
peer=(label=###SLOT_SECURITY_TAGS###),
# Allow clients to query service properties
dbus (send)
bus=system
path=/com/ubuntu/location/Service
interface=org.freedesktop.DBus.Properties
member="{Get,Set}"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (receive)
bus=system
path=/com/ubuntu/location/Service
interface=org.freedesktop.DBus.Properties
member=PropertiesChanged
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (receive)
bus=system
path=/
interface=org.freedesktop.DBus.ObjectManager
peer=(label=unconfined),
# Allow clients to introspect the service
dbus (send)
bus=system
path=/com/ubuntu/location/Service
interface=org.freedesktop.DBus.Introspectable
member=Introspect
peer=(label=###SLOT_SECURITY_TAGS###),
`
const locationControlPermanentSlotDBus = `
<policy user="root">
<allow own="com.ubuntu.location.Service"/>
<allow send_destination="com.ubuntu.location.Service"/>
<allow send_interface="com.ubuntu.location.Service"/>
<allow send_interface="com.ubuntu.location.Service.Provider"/>
</policy>
`
const locationControlConnectedPlugDBus = `
<policy context="default">
<deny own="com.ubuntu.location.Service"/>
<allow send_destination="com.ubuntu.location.Service"/>
<allow send_interface="com.ubuntu.location.Service"/>
<allow receive_interface="com.ubuntu.location.Service.Provider"/>
</policy>
`
type locationControlInterface struct{}
func (iface *locationControlInterface) Name() string {
return "location-control"
}
func (iface *locationControlInterface) StaticInfo() interfaces.StaticInfo {
return interfaces.StaticInfo{
Summary: locationControlSummary,
BaseDeclarationSlots: locationControlBaseDeclarationSlots,
}
}
func (iface *locationControlInterface) AppArmorConnectedPlug(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
old := "###SLOT_SECURITY_TAGS###"
new := spec.SnapAppSet().SlotLabelExpression(slot)
snippet := strings.Replace(locationControlConnectedPlugAppArmor, old, new, -1)
spec.AddSnippet(snippet)
return nil
}
func (iface *locationControlInterface) DBusConnectedPlug(spec *dbus.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
spec.AddSnippet(locationControlConnectedPlugDBus)
return nil
}
func (iface *locationControlInterface) DBusPermanentSlot(spec *dbus.Specification, slot *snap.SlotInfo) error {
spec.AddSnippet(locationControlPermanentSlotDBus)
return nil
}
func (iface *locationControlInterface) AppArmorPermanentSlot(spec *apparmor.Specification, slot *snap.SlotInfo) error {
spec.AddSnippet(locationControlPermanentSlotAppArmor)
return nil
}
func (iface *locationControlInterface) AppArmorConnectedSlot(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
old := "###PLUG_SECURITY_TAGS###"
new := spec.SnapAppSet().PlugLabelExpression(plug)
snippet := strings.Replace(locationControlConnectedSlotAppArmor, old, new, -1)
spec.AddSnippet(snippet)
return nil
}
func (iface *locationControlInterface) AutoConnect(*snap.PlugInfo, *snap.SlotInfo) bool {
// allow what declarations allowed
return true
}
func init() {
registerIface(&locationControlInterface{})
}