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|
; -*- lisp -*-
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2018 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
;; This is a specification for SELinux 2.7 written in the SELinux Common
;; Intermediate Language (CIL). It refers to types that must be defined in
;; the system's base policy.
(block guix_daemon
;; Require existing types
(typeattributeset cil_gen_require init_t)
(typeattributeset cil_gen_require tmp_t)
(typeattributeset cil_gen_require nscd_var_run_t)
(typeattributeset cil_gen_require var_log_t)
(typeattributeset cil_gen_require domain)
;; Declare own types
(type guix_daemon_t)
(roletype object_r guix_daemon_t)
(type guix_daemon_conf_t)
(roletype object_r guix_daemon_conf_t)
(type guix_daemon_exec_t)
(roletype object_r guix_daemon_exec_t)
(type guix_daemon_socket_t)
(roletype object_r guix_daemon_socket_t)
(type guix_store_content_t)
(roletype object_r guix_store_content_t)
(type guix_profiles_t)
(roletype object_r guix_profiles_t)
;; These types are domains, thereby allowing process rules
(typeattributeset domain (guix_daemon_t guix_daemon_exec_t))
(level low (s0))
;; When a process in init_t or guix_store_content_t spawns a
;; guix_daemon_exec_t process, let it run in the guix_daemon_t context
(typetransition init_t guix_daemon_exec_t
process guix_daemon_t)
(typetransition guix_store_content_t guix_daemon_exec_t
process guix_daemon_t)
;; Permit communication with NSCD
(allow guix_daemon_t
nscd_var_run_t
(file (map read)))
(allow guix_daemon_t
nscd_var_run_t
(dir (search)))
(allow guix_daemon_t
nscd_var_run_t
(sock_file (write)))
(allow guix_daemon_t
nscd_t
(fd (use)))
(allow guix_daemon_t
nscd_t
(unix_stream_socket (connectto)))
;; Permit logging and temp file access
(allow guix_daemon_t
tmp_t
(lnk_file (setattr unlink)))
(allow guix_daemon_t
tmp_t
(dir (create
rmdir
add_name remove_name
open read write
getattr setattr
search)))
(allow guix_daemon_t
var_log_t
(file (create getattr open write)))
(allow guix_daemon_t
var_log_t
(dir (getattr write add_name)))
(allow guix_daemon_t
var_run_t
(lnk_file (read)))
(allow guix_daemon_t
var_run_t
(dir (search)))
;; Spawning processes, execute helpers
(allow guix_daemon_t
self
(process (fork)))
(allow guix_daemon_t
guix_daemon_exec_t
(file (execute execute_no_trans read open)))
;; TODO: unknown
(allow guix_daemon_t
root_t
(dir (mounton)))
(allow guix_daemon_t
fs_t
(filesystem (getattr)))
(allow guix_daemon_conf_t
fs_t
(filesystem (associate)))
;; Build isolation
(allow guix_daemon_t
guix_store_content_t
(file (mounton)))
(allow guix_store_content_t
fs_t
(filesystem (associate)))
(allow guix_daemon_t
guix_store_content_t
(dir (mounton)))
(allow guix_daemon_t
guix_daemon_t
(capability (net_admin
fsetid fowner
chown setuid setgid
dac_override dac_read_search
sys_chroot)))
(allow guix_daemon_t
fs_t
(filesystem (unmount)))
(allow guix_daemon_t
devpts_t
(filesystem (mount)))
(allow guix_daemon_t
devpts_t
(chr_file (setattr getattr)))
(allow guix_daemon_t
tmpfs_t
(filesystem (mount)))
(allow guix_daemon_t
tmpfs_t
(dir (getattr)))
(allow guix_daemon_t
proc_t
(filesystem (mount)))
(allow guix_daemon_t
null_device_t
(chr_file (getattr open read write)))
(allow guix_daemon_t
kvm_device_t
(chr_file (getattr)))
(allow guix_daemon_t
zero_device_t
(chr_file (getattr)))
(allow guix_daemon_t
urandom_device_t
(chr_file (getattr)))
(allow guix_daemon_t
random_device_t
(chr_file (getattr)))
(allow guix_daemon_t
devtty_t
(chr_file (getattr)))
;; Access to store items
(allow guix_daemon_t
guix_store_content_t
(dir (reparent
create
getattr setattr
search rename
add_name remove_name
open write
rmdir)))
(allow guix_daemon_t
guix_store_content_t
(file (create
lock
setattr getattr
execute execute_no_trans
link unlink
map
rename
open read write)))
(allow guix_daemon_t
guix_store_content_t
(lnk_file (create
getattr setattr
link unlink
read
rename)))
;; Access to configuration files and directories
(allow guix_daemon_t
guix_daemon_conf_t
(dir (search
setattr getattr
add_name remove_name
open read write)))
(allow guix_daemon_t
guix_daemon_conf_t
(file (create
lock
map
getattr setattr
unlink
open read write)))
(allow guix_daemon_t
guix_daemon_conf_t
(lnk_file (create getattr rename unlink)))
;; Access to profiles
(allow guix_daemon_t
guix_profiles_t
(dir (getattr setattr read open)))
(allow guix_daemon_t
guix_profiles_t
(lnk_file (read getattr)))
;; Access to profile links in the home directory
;; TODO: allow access to profile links *anywhere* on the filesystem
(allow guix_daemon_t
user_home_t
(lnk_file (read getattr)))
(allow guix_daemon_t
user_home_t
(dir (search)))
;; Socket operations
(allow guix_daemon_t
init_t
(fd (use)))
(allow guix_daemon_t
init_t
(unix_stream_socket (write)))
(allow guix_daemon_t
guix_daemon_conf_t
(unix_stream_socket (listen)))
(allow guix_daemon_t
guix_daemon_conf_t
(sock_file (create unlink)))
(allow guix_daemon_t
self
(unix_stream_socket (create
read write
connect bind accept
getopt setopt)))
(allow guix_daemon_t
self
(fifo_file (write read)))
(allow guix_daemon_t
self
(udp_socket (ioctl create)))
;; Label file system
(filecon "@guix_sysconfdir@/guix(/.*)?"
any (system_u object_r guix_daemon_conf_t (low low)))
(filecon "@guix_localstatedir@/guix(/.*)?"
any (system_u object_r guix_daemon_conf_t (low low)))
(filecon "@guix_localstatedir@/guix/profiles(/.*)?"
any (system_u object_r guix_profiles_t (low low)))
(filecon "/gnu"
dir (unconfined_u object_r guix_store_content_t (low low)))
(filecon "@storedir@(/.+)?"
any (unconfined_u object_r guix_store_content_t (low low)))
(filecon "@storedir@/[^/]+/.+"
any (unconfined_u object_r guix_store_content_t (low low)))
(filecon "@prefix@/bin/guix-daemon"
file (system_u object_r guix_daemon_exec_t (low low)))
(filecon "@storedir@/.+-(guix-.+|profile)/bin/guix-daemon"
file (system_u object_r guix_daemon_exec_t (low low)))
(filecon "@guix_localstatedir@/guix/daemon-socket/socket"
any (system_u object_r guix_daemon_socket_t (low low))))
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