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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
const rawusbSummary = `allows raw access to all USB devices`
const rawusbBaseDeclarationSlots = `
raw-usb:
allow-installation:
slot-snap-type:
- core
deny-auto-connection: true
`
const rawusbConnectedPlugAppArmor = `
# Description: Allow raw access to all connected USB devices.
# This gives privileged access to the system.
/dev/bus/usb/[0-9][0-9][0-9]/[0-9][0-9][0-9] rw,
# Allow access to all ttyUSB devices too
/dev/tty{USB,ACM}[0-9]* rwk,
@{PROC}/tty/drivers r,
# Allow raw access to USB printers (i.e. for receipt printers in POS systems).
/dev/usb/lp[0-9]* rwk,
# Allow detection of usb devices. Leaks plugged in USB device info
/sys/bus/usb/devices/ r,
/sys/devices/pci**/usb[0-9]** r,
/sys/devices/platform/soc**/*.usb**/usb[0-9]** r,
/sys/devices/platform/scb/*.pcie/pci**/usb[0-9]** r,
/sys/devices/platform/axi/*.pcie/*.usb/xhci-hcd.[0-9]*/usb[0-9]** r,
/sys/devices/platform/axi/*.usb/usb[0-9]** r,
/run/udev/data/c16[67]:[0-9] r, # ACM USB modems
/run/udev/data/b180:* r, # various USB block devices
/run/udev/data/c18[089]:* r, # various USB character devices: USB serial converters, etc.
/run/udev/data/+usb:* r,
`
const rawusbConnectedPlugSecComp = `
# Description: Allow raw access to all connected USB devices.
# This gives privileged access to the system.
# kernel uevents
socket AF_NETLINK - NETLINK_KOBJECT_UEVENT
`
var rawusbConnectedPlugUDev = []string{
`SUBSYSTEM=="usb"`,
`SUBSYSTEM=="usbmisc"`,
`SUBSYSTEM=="tty", ENV{ID_BUS}=="usb"`,
}
func init() {
registerIface(&commonInterface{
name: "raw-usb",
summary: rawusbSummary,
implicitOnCore: true,
implicitOnClassic: true,
baseDeclarationSlots: rawusbBaseDeclarationSlots,
connectedPlugAppArmor: rawusbConnectedPlugAppArmor,
connectedPlugSecComp: rawusbConnectedPlugSecComp,
connectedPlugUDev: rawusbConnectedPlugUDev,
})
}
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