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bluez.go
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bluez.go
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// -*- 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/interfaces/seccomp"
"github.com/snapcore/snapd/interfaces/udev"
"github.com/snapcore/snapd/release"
"github.com/snapcore/snapd/snap"
)
const bluezSummary = `allows operating as the bluez service`
const bluezBaseDeclarationSlots = `
bluez:
allow-installation:
slot-snap-type:
- app
- core
deny-auto-connection: true
deny-connection:
on-classic: false
`
const bluezPermanentSlotAppArmor = `
# Description: Allow operating as the bluez service. This gives privileged
# access to the system.
network bluetooth,
capability net_admin,
capability net_bind_service,
# libudev
network netlink raw,
# File accesses
/sys/bus/usb/drivers/btusb/ r,
/sys/bus/usb/drivers/btusb/** r,
/sys/class/bluetooth/ r,
/sys/devices/**/bluetooth/ rw,
/sys/devices/**/bluetooth/** rw,
/sys/devices/**/id/chassis_type r,
# TODO: use snappy hardware assignment for this once LP: #1498917 is fixed
/dev/rfkill rw,
# 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/*
interface=org.freedesktop.DBus.Properties
peer=(label=unconfined),
# Allow binding the service to the requested connection name
dbus (bind)
bus=system
name="org.bluez",
# Allow binding the service to the requested connection name
dbus (bind)
bus=system
name="org.bluez.obex",
# Allow binding the service to the requested connection name
dbus (bind)
bus=system
name="org.bluez.mesh",
# Allow traffic to/from our interface with any method for unconfined clients
# to talk to our bluez services. For the org.bluez interface we don't specify
# an Object Path since according to the bluez specification these can be
# anything (https://git.kernel.org/pub/scm/bluetooth/bluez.git/tree/doc).
dbus (receive, send)
bus=system
interface=org.bluez.*
peer=(label=unconfined),
dbus (receive, send)
bus=system
path=/org/bluez{,/**}
interface=org.freedesktop.DBus.*
peer=(label=unconfined),
# Allow traffic to/from org.freedesktop.DBus for bluez service. This rule is
# not snap-specific and grants privileged access to the org.freedesktop.DBus
# on the system bus.
dbus (receive, send)
bus=system
path=/
interface=org.freedesktop.DBus.*
peer=(label=unconfined),
# Allow access to hostname system service
dbus (receive, send)
bus=system
path=/org/freedesktop/hostname1
interface=org.freedesktop.DBus.Properties
peer=(label=unconfined),
# do not use peer=(label=unconfined) here since this is DBus activated
dbus (send)
bus=system
path=/org/freedesktop/hostname1
interface=org.freedesktop.DBus.Properties
member="Get{,All}",
dbus (send)
bus=system
path=/org/freedesktop/hostname1
interface=org.freedesktop.DBus.Introspectable
member=Introspect,
`
const bluezConnectedSlotAppArmor = `
# Allow connected clients to interact with the service
# Allow all access to bluez service
dbus (receive, send)
bus=system
peer=(label=###PLUG_SECURITY_TAGS###),
`
const bluezConnectedPlugAppArmor = `
# Description: Allow using bluez service. This gives privileged access to the
# bluez service.
#include <abstractions/dbus-strict>
# Allow all access to bluez service
dbus (receive, send)
bus=system
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (send)
bus=system
peer=(name=org.bluez, label=unconfined),
dbus (send)
bus=system
peer=(name=org.bluez.obex, label=unconfined),
dbus (send)
bus=system
peer=(name=org.bluez.mesh, label=unconfined),
dbus (receive)
bus=system
path=/
interface=org.freedesktop.DBus.ObjectManager
peer=(label=unconfined),
dbus (receive)
bus=system
path=/org/bluez{,/**}
interface=org.freedesktop.DBus.*
peer=(label=unconfined),
# Allow access to bluetooth audio streams
network bluetooth,
`
const bluezPermanentSlotSecComp = `
# Description: Allow operating as the bluez service. This gives privileged
# access to the system.
accept
accept4
bind
listen
# libudev
socket AF_NETLINK - NETLINK_KOBJECT_UEVENT
`
const bluezPermanentSlotDBus = `
<policy user="root">
<allow own="org.bluez"/>
<allow own="org.bluez.obex"/>
<allow own="org.bluez.mesh"/>
<allow send_destination="org.bluez"/>
<allow send_destination="org.bluez.obex"/>
<allow send_destination="org.bluez.mesh"/>
<allow send_interface="org.bluez.Agent1"/>
<allow send_interface="org.bluez.MediaEndpoint1"/>
<allow send_interface="org.bluez.MediaPlayer1"/>
<allow send_interface="org.bluez.ThermometerWatcher1"/>
<allow send_interface="org.bluez.AlertAgent1"/>
<allow send_interface="org.bluez.Profile1"/>
<allow send_interface="org.bluez.HeartRateWatcher1"/>
<allow send_interface="org.bluez.CyclingSpeedWatcher1"/>
<allow send_interface="org.bluez.GattCharacteristic1"/>
<allow send_interface="org.bluez.GattDescriptor1"/>
<allow send_interface="org.bluez.mesh.Element1"/>
<allow send_interface="org.bluez.mesh.Application1"/>
<allow send_interface="org.bluez.mesh.ProvisionAgent1"/>
<allow send_interface="org.bluez.mesh.Provisioner1"/>
<allow send_interface="org.bluez.mesh.Attention1"/>
<allow send_interface="org.bluez.mesh.Network1"/>
<allow send_interface="org.bluez.mesh.Node1"/>
<allow send_interface="org.bluez.mesh.Management1"/>
<allow send_interface="org.freedesktop.DBus.ObjectManager"/>
<allow send_interface="org.freedesktop.DBus.Properties"/>
</policy>
<policy context="default">
<deny send_destination="org.bluez"/>
</policy>
`
type bluezInterface struct{}
func (iface *bluezInterface) Name() string {
return "bluez"
}
func (iface *bluezInterface) StaticInfo() interfaces.StaticInfo {
return interfaces.StaticInfo{
Summary: bluezSummary,
ImplicitOnClassic: true,
BaseDeclarationSlots: bluezBaseDeclarationSlots,
}
}
func (iface *bluezInterface) DBusPermanentSlot(spec *dbus.Specification, slot *snap.SlotInfo) error {
if !release.OnClassic {
spec.AddSnippet(bluezPermanentSlotDBus)
}
return nil
}
func (iface *bluezInterface) AppArmorConnectedPlug(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
old := "###SLOT_SECURITY_TAGS###"
var new string
if release.OnClassic {
new = "unconfined"
} else {
new = slotAppLabelExpr(slot)
}
snippet := strings.Replace(bluezConnectedPlugAppArmor, old, new, -1)
spec.AddSnippet(snippet)
return nil
}
func (iface *bluezInterface) AppArmorConnectedSlot(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
if !release.OnClassic {
old := "###PLUG_SECURITY_TAGS###"
new := plugAppLabelExpr(plug)
snippet := strings.Replace(bluezConnectedSlotAppArmor, old, new, -1)
spec.AddSnippet(snippet)
}
return nil
}
func (iface *bluezInterface) UDevConnectedPlug(spec *udev.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
spec.TagDevice(`KERNEL=="rfkill"`)
return nil
}
func (iface *bluezInterface) AppArmorPermanentSlot(spec *apparmor.Specification, slot *snap.SlotInfo) error {
if !release.OnClassic {
spec.AddSnippet(bluezPermanentSlotAppArmor)
}
return nil
}
func (iface *bluezInterface) SecCompPermanentSlot(spec *seccomp.Specification, slot *snap.SlotInfo) error {
if !release.OnClassic {
spec.AddSnippet(bluezPermanentSlotSecComp)
}
return nil
}
func (iface *bluezInterface) AutoConnect(*snap.PlugInfo, *snap.SlotInfo) bool {
// allow what declarations allowed
return true
}
func init() {
registerIface(&bluezInterface{})
}