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// -*- 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/snap"
)
const thumbnailerServiceSummary = `allows operating as or interacting with the Thumbnailer service`
const thumbnailerServiceBaseDeclarationSlots = `
thumbnailer-service:
allow-installation:
slot-snap-type:
- app
deny-auto-connection: true
deny-connection: true
`
const thumbnailerServicePermanentSlotAppArmor = `
# Description: Allow use of aa_query_label API. This
# discloses the AppArmor policy for all processes.
/sys/module/apparmor/parameters/enabled r,
@{PROC}/@{pid}/mounts r,
/sys/kernel/security/apparmor/.access rw,
# Description: Allow owning the Thumbnailer bus name 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.Thumbnailer,
`
const thumbnailerServiceConnectedSlotAppArmor = `
# Description: Allow access to plug's data directory.
@{INSTALL_DIR}/###PLUG_SNAP_NAME###/** r,
owner @{HOME}/snap/###PLUG_SNAP_NAME###/** r,
/var/snap/###PLUG_SNAP_NAME###/** r,
# Description: allow client snaps to access the thumbnailer service.
dbus (receive, send)
bus=session
interface=com.canonical.Thumbnailer
path=/com/canonical/Thumbnailer
peer=(label=###PLUG_SECURITY_TAGS###),
`
const thumbnailerServiceConnectedPlugAppArmor = `
# Description: allow access to the thumbnailer D-Bus service.
#include <abstractions/dbus-session-strict>
dbus (receive, send)
bus=session
interface=com.canonical.Thumbnailer
path=/com/canonical/Thumbnailer
peer=(label=###SLOT_SECURITY_TAGS###),
# Allow clients to introspect the service
dbus (send)
bus=session
interface=org.freedesktop.DBus.Introspectable
path=/com/canonical/Thumbnailer
member=Introspect
peer=(label=###SLOT_SECURITY_TAGS###),
`
type thumbnailerServiceInterface struct{}
func (iface *thumbnailerServiceInterface) Name() string {
return "thumbnailer-service"
}
func (iface *thumbnailerServiceInterface) StaticInfo() interfaces.StaticInfo {
return interfaces.StaticInfo{
Summary: thumbnailerServiceSummary,
BaseDeclarationSlots: thumbnailerServiceBaseDeclarationSlots,
}
}
func (iface *thumbnailerServiceInterface) AppArmorConnectedPlug(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
snippet := thumbnailerServiceConnectedPlugAppArmor
old := "###SLOT_SECURITY_TAGS###"
new := slotAppLabelExpr(slot)
snippet = strings.Replace(snippet, old, new, -1)
spec.AddSnippet(snippet)
return nil
}
func (iface *thumbnailerServiceInterface) AppArmorPermanentSlot(spec *apparmor.Specification, slot *snap.SlotInfo) error {
spec.AddSnippet(thumbnailerServicePermanentSlotAppArmor)
return nil
}
func (iface *thumbnailerServiceInterface) AppArmorConnectedSlot(spec *apparmor.Specification, plug *interfaces.ConnectedPlug, slot *interfaces.ConnectedSlot) error {
snippet := thumbnailerServiceConnectedSlotAppArmor
old := "###PLUG_SNAP_NAME###"
// parallel-installs: PLUG_SNAP_NAME is used in the context of dbus
// mediation rules, need to use the actual instance name
new := plug.Snap().InstanceName()
snippet = strings.Replace(snippet, old, new, -1)
old = "###PLUG_SECURITY_TAGS###"
new = plugAppLabelExpr(plug)
snippet = strings.Replace(snippet, old, new, -1)
spec.AddSnippet(snippet)
return nil
}
func (iface *thumbnailerServiceInterface) AutoConnect(plug *snap.PlugInfo, slot *snap.SlotInfo) bool {
return true
}
func init() {
registerIface(&thumbnailerServiceInterface{})
}
|
