apparmor.d/profiles/dnscrypt-proxy

# apparmor.d - Full set of apparmor profiles
# Copyright (C) 2018-2021 Mikhail Morfikov
# SPDX-License-Identifier: GPL-2.0-only

abi <abi/3.0>,

include <tunables/global>

@{exec_path} = /{usr/,}sbin/dnscrypt-proxy
profile dnscrypt-proxy @{exec_path} {
  include <abstractions/base>
  include <abstractions/nameservice-strict>
  include <abstractions/ssl_certs>

  # To bind to the 53 tcp/udp port (when systemd's sockets aren't used).
  capability net_bind_service,

  # Needed for privilege drop (to run as _dnscrypt-proxy:nogroup).
  capability setgid,
  capability setuid,

  # Needed?
  capability net_admin,

  network inet dgram,
  network inet6 dgram,
  network inet stream,
  network inet6 stream,

  @{exec_path} mrix,

  # dnscrypt-proxy config files
  /etc/dnscrypt-proxy/ r,
  /etc/dnscrypt-proxy/dnscrypt-proxy.toml r,
  /etc/dnscrypt-proxy/whitelist.txt r,
  /etc/dnscrypt-proxy/blacklist.txt r,
  /etc/dnscrypt-proxy/cloaking-rules.txt r,
  /etc/dnscrypt-proxy/forwarding-rules.txt r,

  # This is for the built-in DoH server / Firefox ESNI (Encrypted ClientHello)
  # See: https://github.com/DNSCrypt/dnscrypt-proxy/wiki/Local-DoH
  owner /etc/dnscrypt-proxy/localhost.pem r,

  # For downloading the relays.md and public-resolvers.md files (for offline use, which can fix
  # connectivity issues).
  owner /etc/dnscrypt-proxy/sf-*.tmp rw,
  owner /etc/dnscrypt-proxy/relays.md rw,
  owner /etc/dnscrypt-proxy/relays.md.minisig rw,
  owner /etc/dnscrypt-proxy/public-resolvers.md rw,
  owner /etc/dnscrypt-proxy/public-resolvers.md.minisig rw,
  owner /var/cache/dnscrypt-proxy/sf-*.tmp rw,
  owner /var/cache/dnscrypt-proxy/relays.md rw,
  owner /var/cache/dnscrypt-proxy/relays.md.minisig rw,
  owner /var/cache/dnscrypt-proxy/public-resolvers.md rw,
  owner /var/cache/dnscrypt-proxy/public-resolvers.md.minisig rw,

  @{PROC}/sys/net/core/somaxconn r,
  @{PROC}/sys/kernel/hostname r,

  @{sys}/kernel/mm/transparent_hugepage/hpage_pmd_size r,

  # Logs
  /var/log/dnscrypt-proxy/ r,
  /var/log/dnscrypt-proxy/*.log w,
  /var/log/private/dnscrypt-proxy/ rw,
  /var/log/private/dnscrypt-proxy/*.log w,

  /var/cache/private/dnscrypt-proxy/sf-*.tmp rw,
  /var/cache/private/dnscrypt-proxy/public-resolvers.md{,.minisig} rw,

  # Needed?
  deny /etc/ssl/certs/java/ r,

  include if exists <local/dnscrypt-proxy>
}