# vim:syntax=apparmor
# ------------------------------------------------------------------
#
#    Copyright (C) 2019-2021 Mikhail Morfikov
#
#    This program is free software; you can redistribute it and/or
#    modify it under the terms of version 2 of the GNU General Public
#    License published by the Free Software Foundation.
#
# ------------------------------------------------------------------

abi <abi/3.0>,

include <tunables/global>

@{exec_path} = /{usr/,}sbin/useradd
profile useradd @{exec_path} {
  include <abstractions/base>
  include <abstractions/consoles>
  include <abstractions/nameservice-strict>

  # To create a user home dir and give it proper permissions:
  #  mkdir("/home/user", 000)      = 0
  #  chown("/home/user", 0, 0)     = 0
  #  chmod("/home/user", 0755)     = 0
  #  chown("/home/user/", 1001, 1001) = 0
  #  chmod("/home/user/", 0755)    = 0
  capability chown,
  capability fowner,

  # To set the set-group-ID bit for the user home dir.
  capability fsetid,

  # To copy files from the /etc/skel/ dir to the newly created user dir, which now has a different
  # owner.
  capability dac_read_search,
  capability dac_override,

  # To write records to the kernel auditing log.
  capability audit_write,

  network netlink raw,

  @{exec_path} mr,

  /{usr/,}bin/usermod     rPx,

  /{usr/,}sbin/pam_tally2 rCx -> pam_tally2,

  /etc/login.defs r,

  /etc/default/useradd r,

  /etc/{passwd,shadow,gshadow,group,subuid,subgid} rw,
  /etc/{passwd,shadow,gshadow,group,subuid,subgid}.@{pid} w,
  /etc/{passwd,shadow,gshadow,group,subuid,subgid}- w,
  /etc/{passwd,shadow,gshadow,group,subuid,subgid}+ rw,

  /etc/passwd.lock  wl -> /etc/passwd.@{pid},
  /etc/shadow.lock  wl -> /etc/shadow.@{pid},
  /etc/group.lock   wl -> /etc/group.@{pid},
  /etc/gshadow.lock wl -> /etc/gshadow.@{pid},
  /etc/subuid.lock  wl -> /etc/subuid.@{pid},
  /etc/subgid.lock  wl -> /etc/subgid.@{pid},

  # A process first uses lckpwdf() to lock the lock file, thereby gaining exclusive rights to
  # modify the /etc/passwd or /etc/shadow password database.
  /etc/.pwd.lock rwk,

  /var/log/faillog rw,
  /var/log/lastlog rw,

  # To create user dirs
  @{HOME}/ rw,

  # To copy files from /etc/skel/ to user dirs
  @{HOME}/.* w,
  /etc/skel/{,.*} r,


  profile pam_tally2 {
    include <abstractions/base>
    include <abstractions/consoles>
    include <abstractions/nameservice-strict>

    capability audit_write,

    /{usr/,}sbin/pam_tally2 mr,

    /var/log/tallylog rw,

  }

  include if exists <local/useradd>
}