/
location_observe.go
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/
location_observe.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/snap"
)
const locationObserveSummary = `allows access to the current physical location`
const locationObserveBaseDeclarationSlots = `
location-observe:
allow-installation:
slot-snap-type:
- app
deny-connection: true
deny-auto-connection: true
`
const locationObservePermanentSlotAppArmor = `
# 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 locationObserveConnectedSlotAppArmor = `
# Allow connected clients to interact with the service
# Allow the service to host sessions
dbus (bind)
bus=system
name="com.ubuntu.location.Service.Session",
# Allow clients to create a session
dbus (receive)
bus=system
path=/com/ubuntu/location/Service
interface=com.ubuntu.location.Service
member=CreateSessionForCriteria
peer=(label=###PLUG_SECURITY_TAGS###),
# Allow clients to query service properties
dbus (receive)
bus=system
path=/com/ubuntu/location/Service
interface=org.freedesktop.DBus.Properties
member=Get
peer=(label=###PLUG_SECURITY_TAGS###),
# Allow clients to request starting/stopping updates
dbus (receive)
bus=system
path=/sessions/*
interface=com.ubuntu.location.Service.Session
member="{Start,Stop}PositionUpdates"
peer=(label=###PLUG_SECURITY_TAGS###),
dbus (receive)
bus=system
path=/sessions/*
interface=com.ubuntu.location.Service.Session
member="{Start,Stop}HeadingUpdates"
peer=(label=###PLUG_SECURITY_TAGS###),
dbus (receive)
bus=system
path=/sessions/*
interface=com.ubuntu.location.Service.Session
member="{Start,Stop}VelocityUpdates"
peer=(label=###PLUG_SECURITY_TAGS###),
# Allow the service to send updates to clients
dbus (send)
bus=system
path=/sessions/*
interface=com.ubuntu.location.Service.Session
member="Update{Position,Heading,Velocity}"
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 locationObserveConnectedPlugAppArmor = `
# Description: Allow using location service. This gives privileged access to
# the service.
#include <abstractions/dbus-strict>
# Allow clients to query service properties
dbus (send)
bus=system
path=/com/ubuntu/location/Service
interface=org.freedesktop.DBus.Properties
member=Get
peer=(label=###SLOT_SECURITY_TAGS###),
# Allow clients to create a session
dbus (send)
bus=system
path=/com/ubuntu/location/Service
interface=com.ubuntu.location.Service
member=CreateSessionForCriteria
peer=(label=###SLOT_SECURITY_TAGS###),
# Allow clients to request starting/stopping updates
dbus (send)
bus=system
path=/sessions/*
interface=com.ubuntu.location.Service.Session
member="{Start,Stop}PositionUpdates"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (send)
bus=system
path=/sessions/*
interface=com.ubuntu.location.Service.Session
member="{Start,Stop}HeadingUpdates"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (send)
bus=system
path=/sessions/*
interface=com.ubuntu.location.Service.Session
member="{Start,Stop}VelocityUpdates"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (send)
bus=system
path=/com/ubuntu/location/Service/sessions/*
interface=com.ubuntu.location.Service.Session
member="{Start,Stop}PositionUpdates"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (send)
bus=system
path=/com/ubuntu/location/Service/sessions/*
interface=com.ubuntu.location.Service.Session
member="{Start,Stop}HeadingUpdates"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (send)
bus=system
path=/com/ubuntu/location/Service/sessions/*
interface=com.ubuntu.location.Service.Session
member="{Start,Stop}VelocityUpdates"
peer=(label=###SLOT_SECURITY_TAGS###),
# Allow clients to receive updates from the service
dbus (receive)
bus=system
path=/sessions/*
interface=com.ubuntu.location.Service.Session
member="Update{Position,Heading,Velocity}"
peer=(label=###SLOT_SECURITY_TAGS###),
dbus (receive)
bus=system
path=/com/ubuntu/location/Service/sessions/*
interface=com.ubuntu.location.Service.Session
member="Update{Position,Heading,Velocity}"
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 locationObservePermanentSlotDBus = `
<policy user="root">
<allow own="com.ubuntu.location.Service"/>
<allow own="com.ubuntu.location.Service.Session"/>
<allow send_destination="com.ubuntu.location.Service"/>
<allow send_destination="com.ubuntu.location.Service.Session"/>
<allow send_interface="com.ubuntu.location.Service"/>
<allow send_interface="com.ubuntu.location.Service.Session"/>
</policy>
`
const locationObserveConnectedPlugDBus = `
<policy context="default">
<deny own="com.ubuntu.location.Service"/>
<allow send_destination="com.ubuntu.location.Service"/>
<allow send_destination="com.ubuntu.location.Service.Session"/>
<allow send_interface="com.ubuntu.location.Service"/>
<allow send_interface="com.ubuntu.location.Service.Session"/>
</policy>
`
type locationObserveInterface struct{}
func (iface *locationObserveInterface) Name() string {
return "location-observe"
}
func (iface *locationObserveInterface) StaticInfo() interfaces.StaticInfo {
return interfaces.StaticInfo{
Summary: locationObserveSummary,
BaseDeclarationSlots: locationObserveBaseDeclarationSlots,
}
}
func (iface *locationObserveInterface) DBusConnectedPlug(spec *dbus.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
spec.AddSnippet(locationObserveConnectedPlugDBus)
return nil
}
func (iface *locationObserveInterface) DBusPermanentSlot(spec *dbus.Specification, slot *snap.SlotInfo) error {
spec.AddSnippet(locationObservePermanentSlotDBus)
return nil
}
func (iface *locationObserveInterface) AppArmorConnectedPlug(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
old := "###SLOT_SECURITY_TAGS###"
new := spec.SnapAppSet().SlotLabelExpression(slot)
snippet := strings.Replace(locationObserveConnectedPlugAppArmor, old, new, -1)
spec.AddSnippet(snippet)
return nil
}
func (iface *locationObserveInterface) AppArmorPermanentSlot(spec *apparmor.Specification, slot *snap.SlotInfo) error {
spec.AddSnippet(locationObservePermanentSlotAppArmor)
return nil
}
func (iface *locationObserveInterface) AppArmorConnectedSlot(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
old := "###PLUG_SECURITY_TAGS###"
new := spec.SnapAppSet().PlugLabelExpression(plug)
snippet := strings.Replace(locationObserveConnectedSlotAppArmor, old, new, -1)
spec.AddSnippet(snippet)
return nil
}
func (iface *locationObserveInterface) AutoConnect(*snap.PlugInfo, *snap.SlotInfo) bool {
// allow what declarations allowed
return true
}
func init() {
registerIface(&locationObserveInterface{})
}