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
|
// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 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/seccomp"
"github.com/snapcore/snapd/snap"
)
const storageFrameworkServiceSummary = `allows operating as or interacting with the Storage Framework`
const storageFrameworkServiceBaseDeclarationSlots = `
storage-framework-service:
allow-installation:
slot-snap-type:
- app
deny-connection: true
deny-auto-connection: true
`
const storageFrameworkServicePermanentSlotAppArmor = `
# Description: Allow use of aa_is_enabled()
# libapparmor query interface needs 'w' to perform the query and 'r' to
# read the result. This is an information leak because in addition to
# allowing querying policy for any label (precisely what
# storage-framework needs), it also allows checking the existence of
# any label.
/sys/module/apparmor/parameters/enabled r,
@{PROC}/@{pid}/mounts r,
/sys/kernel/security/apparmor/.access rw,
# Description: Allow owning the registry and storage framework bus names on the session bus.
#include <abstractions/dbus-session-strict>
dbus (send)
bus=session
path=/org/freedesktop/DBus
interface=org.freedesktop.DBus
member={RequestName,ReleaseName,GetConnectionCredentials}
peer=(name=org.freedesktop.DBus, label=unconfined),
dbus (bind)
bus=session
name=com.canonical.StorageFramework.Registry,
dbus (bind)
bus=session
name=com.canonical.StorageFramework.Provider.*,
`
const storageFrameworkServiceConnectedSlotAppArmor = `
# Description: Allow clients to access the registry and storage framework services.
#include <abstractions/dbus-session-strict>
dbus (receive, send)
bus=session
interface=com.canonical.StorageFramework.Registry
path=/com/canonical/StorageFramework/Registry
peer=(label=###PLUG_SECURITY_TAGS###),
dbus (receive, send)
bus=session
interface=com.canonical.StorageFramework.Provider.*
path=/provider/*
peer=(label=###PLUG_SECURITY_TAGS###),
`
const storageFrameworkServiceConnectedPlugAppArmor = `
# Description: Allow access to the registry and storage framework services.
#include <abstractions/dbus-session-strict>
dbus (receive, send)
bus=session
interface=com.canonical.StorageFramework.Registry
path=/com/canonical/StorageFramework/Registry
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (receive, send)
bus=session
interface=com.canonical.StorageFramework.Provider.*
path=/provider/*
peer=(label=###SLOT_SECURITY_TAGS###),
`
const storageFrameworkServicePermanentSlotSecComp = `
bind
`
type storageFrameworkServiceInterface struct{}
func (iface *storageFrameworkServiceInterface) Name() string {
return "storage-framework-service"
}
func (iface *storageFrameworkServiceInterface) StaticInfo() interfaces.StaticInfo {
return interfaces.StaticInfo{
Summary: storageFrameworkServiceSummary,
BaseDeclarationSlots: storageFrameworkServiceBaseDeclarationSlots,
}
}
func (iface *storageFrameworkServiceInterface) AppArmorConnectedPlug(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
snippet := storageFrameworkServiceConnectedPlugAppArmor
old := "###SLOT_SECURITY_TAGS###"
new := slotAppLabelExpr(slot)
snippet = strings.Replace(snippet, old, new, -1)
spec.AddSnippet(snippet)
return nil
}
func (iface *storageFrameworkServiceInterface) AppArmorPermanentSlot(spec *apparmor.Specification, slot *snap.SlotInfo) error {
spec.AddSnippet(storageFrameworkServicePermanentSlotAppArmor)
return nil
}
func (iface *storageFrameworkServiceInterface) AppArmorConnectedSlot(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
snippet := storageFrameworkServiceConnectedSlotAppArmor
old := "###PLUG_SECURITY_TAGS###"
new := plugAppLabelExpr(plug)
snippet = strings.Replace(snippet, old, new, -1)
spec.AddSnippet(snippet)
return nil
}
func (iface *storageFrameworkServiceInterface) SecCompPermanentSlot(spec *seccomp.Specification, slot *snap.SlotInfo) error {
spec.AddSnippet(storageFrameworkServicePermanentSlotSecComp)
return nil
}
func (iface *storageFrameworkServiceInterface) AutoConnect(plug *snap.PlugInfo, slot *snap.SlotInfo) bool {
return true
}
func init() {
registerIface(&storageFrameworkServiceInterface{})
}
|
