github.com/bugraaydogar/snapd@v0.0.0-20210315170335-8c70bb858939/interfaces/builtin/hardware_random_observe.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2017 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package builtin
    21  
    22  const hardwareRandomObserveSummary = `allows reading from hardware random number generator`
    23  
    24  const hardwareRandomObserveBaseDeclarationSlots = `
    25    hardware-random-observe:
    26      allow-installation:
    27        slot-snap-type:
    28          - core
    29      deny-auto-connection: true
    30  `
    31  
    32  const hardwareRandomObserveConnectedPlugAppArmor = `
    33  # Description: allow direct read-only access to the hardware random number
    34  # generator device. In addition allow observing the available and
    35  # currently-selected hardware random number generator devices.
    36  
    37  /dev/hwrng r,
    38  /run/udev/data/c10:183 r,
    39  /sys/devices/virtual/misc/ r,
    40  /sys/devices/virtual/misc/hw_random/rng_{available,current} r,
    41  `
    42  
    43  var hardwareRandomObserveConnectedPlugUDev = []string{`KERNEL=="hwrng"`}
    44  
    45  func init() {
    46  	registerIface(&commonInterface{
    47  		name:                  "hardware-random-observe",
    48  		summary:               hardwareRandomObserveSummary,
    49  		implicitOnCore:        true,
    50  		implicitOnClassic:     true,
    51  		baseDeclarationSlots:  hardwareRandomObserveBaseDeclarationSlots,
    52  		connectedPlugAppArmor: hardwareRandomObserveConnectedPlugAppArmor,
    53  		connectedPlugUDev:     hardwareRandomObserveConnectedPlugUDev,
    54  	})
    55  }