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
|
// -*- 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
const classicSupportSummary = `special permissions for the classic snap`
const classicSupportBaseDeclarationPlugs = `
classic-support:
allow-installation: false
deny-auto-connection: true
`
const classicSupportBaseDeclarationSlots = `
classic-support:
allow-installation:
slot-snap-type:
- core
deny-auto-connection: true
`
const classicSupportPlugAppArmor = `
# Description: permissions to use classic dimension. This policy is
# intentionally not restricted. This gives device ownership to
# connected snaps.
# Description: permissions to use classic dimension. This policy is intentionally
# not restricted. This gives device ownership to connected snaps.
# for 'create'
/{,usr/}bin/unsquashfs ixr,
/var/lib/snapd/snaps/core_*.snap r,
capability chown,
capability fowner,
capability mknod,
# This allows running anything unconfined
/{,usr/}bin/sudo Uxr,
capability fsetid,
capability dac_override,
# Allow copying configuration to the chroot
/etc/{,**} r,
/var/lib/extrausers/{,*} r,
# Allow bind mounting various directories
capability sys_admin,
/{,usr/}bin/mount ixr,
/{,usr/}bin/mountpoint ixr,
/run/mount/utab rw,
@{PROC}/[0-9]*/mountinfo r,
# parallel-installs: SNAP_{DATA,COMMON} are remapped, need to use SNAP_NAME, for
# completeness allow SNAP_INSTANCE_NAME too
mount options=(rw bind) /home/ -> /var/snap/{@{SNAP_NAME},@{SNAP_INSTANCE_NAME}}/**/,
mount options=(rw bind) /run/ -> /var/snap/{@{SNAP_NAME},@{SNAP_INSTANCE_NAME}}/**/,
mount options=(rw bind) /proc/ -> /var/snap/{@{SNAP_NAME},@{SNAP_INSTANCE_NAME}}/**/,
mount options=(rw bind) /sys/ -> /var/snap/{@{SNAP_NAME},@{SNAP_INSTANCE_NAME}}/**/,
mount options=(rw bind) /dev/ -> /var/snap/{@{SNAP_NAME},@{SNAP_INSTANCE_NAME}}/**/,
mount options=(rw bind) / -> /var/snap/{@{SNAP_NAME},@{SNAP_INSTANCE_NAME}}/**/,
mount fstype=devpts options=(rw) devpts -> /dev/pts/,
mount options=(rw rprivate) -> /var/snap/{@{SNAP_NAME},@{SNAP_INSTANCE_NAME}}/**/,
# reset
/{,usr/}bin/umount ixr,
umount /var/snap/{@{SNAP_NAME},@{SNAP_INSTANCE_NAME}}/**/,
# These rules allow running anything unconfined as well as managing systemd
/usr/bin/systemd-run Uxr,
/bin/systemctl Uxr,
`
const classicSupportPlugSecComp = `
# Description: permissions to use classic dimension. This policy is intentionally
# not restricted. This gives device ownership to connected snaps.
# create
chown
chown32
lchown
lchown32
fchown
fchown32
fchownat
mknod
chroot
# sudo
bind
sendmsg
sendmmsg
sendto
recvfrom
recvmsg
setgroups
setgroups32
# classic
mount
getsockopt
# reset
umount
umount2
`
func init() {
registerIface(&commonInterface{
name: "classic-support",
summary: classicSupportSummary,
implicitOnCore: true,
implicitOnClassic: true,
baseDeclarationPlugs: classicSupportBaseDeclarationPlugs,
baseDeclarationSlots: classicSupportBaseDeclarationSlots,
connectedPlugAppArmor: classicSupportPlugAppArmor,
connectedPlugSecComp: classicSupportPlugSecComp,
})
}
|
