type enforcement

ipsec.te (text/plain), 7.46 KB, created by petre rodan (RETIRED) on 2004-07-06 02:27:57 UTC

#DESC ipsec - TCP/IP encryption
#
# Authors: Mark Westerman [e-mail]
# massively butchered by paul krumviede <[e-mail]>
# further massaged by Chris Vance <[e-mail]>
# gentoo-ed by Petre Rodan <[e-mail]>
#
# X-Debian-Packages: freeswan
# X-Gentoo-Packages: ipsec-tools
#
########################################
#
# Rules for the ipsec_t domain.
#
# a domain for things that need access to the PF_KEY socket
daemon_base_domain(ipsec)

# type for ipsec configuration file(s) - not for keys
type ipsec_conf_file_t, file_type, sysadmfile;

# type for file(s) containing ipsec keys - RSA or preshared
type ipsec_key_file_t, file_type, sysadmfile;

# type for runtime files, including pluto.ctl
var_run_domain(ipsec)

read_locale(ipsec_t)

type ipsec_mgmt_t, domain, privlog, admin, privmodule;
type ipsec_mgmt_exec_t, file_type, sysadmfile, exec_type;
domain_auto_trans(ipsec_mgmt_t, ipsec_exec_t, ipsec_t)
file_type_auto_trans(ipsec_mgmt_t, var_run_t, ipsec_var_run_t, sock_file)

allow ipsec_mgmt_t modules_object_t:dir search;
allow ipsec_mgmt_t modules_object_t:file getattr;

allow ipsec_t self:capability { net_admin net_bind_service };
allow ipsec_t self:process signal;
allow ipsec_t etc_t:lnk_file read;

domain_auto_trans(ipsec_mgmt_t, ifconfig_exec_t, ifconfig_t)

# Inherit and use descriptors from init.
# allow access (for, e.g., klipsdebug) to console
allow { ipsec_t ipsec_mgmt_t } console_device_t:chr_file rw_file_perms;
allow { ipsec_t ipsec_mgmt_t } { init_t initrc_t privfd }:fd use;

# I do not know where this pesky pipe is...
#allow ipsec_t initrc_t:fifo_file { write };

allow ipsec_t ipsec_conf_file_t:file r_file_perms;
allow ipsec_t ipsec_conf_file_t:dir r_dir_perms;
allow ipsec_t ipsec_key_file_t:file { getattr read ioctl };
allow ipsec_t ipsec_key_file_t:lnk_file read;
allow ipsec_t ipsec_key_file_t:dir r_dir_perms;
allow ipsec_mgmt_t ipsec_conf_file_t:file { getattr read ioctl };
rw_dir_create_file(ipsec_mgmt_t, ipsec_key_file_t)

allow ipsec_t self:key_socket { create write read };
allow ipsec_t self:netlink_socket { read };

# for lsof
allow sysadm_t ipsec_t:key_socket getattr;

# the ipsec wrapper wants to run /usr/bin/logger (should we put
# it in its own domain?)
can_exec(ipsec_mgmt_t, bin_t)
# logger, running in ipsec_mgmt_t needs to use sockets
allow ipsec_mgmt_t ipsec_mgmt_t:unix_dgram_socket { create connect write };
allow ipsec_mgmt_t ipsec_t:unix_dgram_socket { create connect write };

# also need to run things like whack and shell scripts
can_exec(ipsec_mgmt_t, ipsec_exec_t)
can_exec(ipsec_mgmt_t, ipsec_mgmt_exec_t)
allow ipsec_mgmt_t ipsec_mgmt_exec_t:lnk_file read;
can_exec(ipsec_mgmt_t, shell_exec_t)
can_exec(ipsec_t, shell_exec_t)
can_exec(ipsec_t, ipsec_mgmt_exec_t)
can_exec(ipsec_mgmt_t, ifconfig_exec_t)

# now for a icky part...
# pluto runs an updown script (by calling popen()!); as this is by default
# a shell script, we need to find a way to make things work without
# letting all sorts of stuff possibly be run...
# so try flipping back into the ipsec_mgmt_t domain
domain_auto_trans(ipsec_t, shell_exec_t, ipsec_mgmt_t)
allow ipsec_mgmt_t ipsec_t:fd use;

# the default updown script wants to run route
can_exec(ipsec_mgmt_t, sbin_t)
allow ipsec_mgmt_t sbin_t:lnk_file read;
allow ipsec_mgmt_t self:capability { net_admin dac_override };

# need access to /proc/sys/net/ipsec/icmp
allow ipsec_mgmt_t sysctl_t:file write;
allow ipsec_mgmt_t sysctl_net_t:file { write setattr };

# whack needs to be able to read/write pluto.ctl
allow ipsec_mgmt_t ipsec_var_run_t:sock_file { read write };
# and it wants to connect to a socket...
allow ipsec_mgmt_t ipsec_mgmt_t:unix_stream_socket { create connect read write };
allow ipsec_mgmt_t ipsec_t:unix_stream_socket { connectto read write };

# allow system administrator to use the ipsec script to look
# at things (e.g., ipsec auto --status)
# probably should create an ipsec_admin role for this kind of thing
can_exec(sysadm_t, ipsec_mgmt_exec_t)
allow sysadm_t ipsec_t:unix_stream_socket connectto;

# _realsetup needs to be able to cat /var/run/pluto.pid,
# run ps on that pid, and delete the file
allow ipsec_mgmt_t ipsec_t:{ file lnk_file } r_file_perms;

allow ipsec_mgmt_t boot_t:dir search;
allow ipsec_mgmt_t system_map_t:file { read getattr };

# denials when ps tries to search /proc. Do not audit these denials.
dontaudit ipsec_mgmt_t domain:dir r_dir_perms;

# suppress audit messages about unnecessary socket access
dontaudit ipsec_mgmt_t domain:key_socket { read write };
dontaudit ipsec_mgmt_t domain:udp_socket { read write };

# from rbac
role system_r types { ipsec_t ipsec_mgmt_t };

# from initrc.te
domain_auto_trans(initrc_t, ipsec_mgmt_exec_t, ipsec_mgmt_t)


########## The following rules were added by [e-mail] ##########

# allow pluto and startup scripts to access /dev/urandom
allow { ipsec_t ipsec_mgmt_t } random_device_t:chr_file r_file_perms;

# allow pluto to access /proc/net/ipsec_eroute;
general_proc_read_access(ipsec_t)
general_proc_read_access(ipsec_mgmt_t)

# allow pluto to search the root directory (not sure why, but mostly harmless)
# Are these all really necessary?
allow ipsec_t var_t:dir { search };
allow ipsec_t bin_t:dir { search };
allow ipsec_t device_t:dir { getattr search };
allow ipsec_mgmt_t device_t:dir { getattr search read };
dontaudit ipsec_mgmt_t tty_device_t:chr_file getattr;
dontaudit ipsec_mgmt_t devpts_t:dir getattr;
allow ipsec_mgmt_t etc_t:lnk_file read;
allow ipsec_mgmt_t var_t:dir { search };
allow ipsec_mgmt_t sbin_t:dir { search };
allow ipsec_mgmt_t bin_t:dir { search };
allow ipsec_mgmt_t ipsec_var_run_t:file { getattr read };

# Startup scripts
# use libraries
uses_shlib({ ipsec_t ipsec_mgmt_t })
# Read and write /dev/tty
allow ipsec_mgmt_t devtty_t:chr_file rw_file_perms;
# fork
allow ipsec_mgmt_t self:process fork;
# startup script runs /bin/gawk with a pipe
allow ipsec_mgmt_t self:fifo_file rw_file_perms;
# read /etc/mtab Why?
allow ipsec_mgmt_t etc_runtime_t:file { read getattr };
# read link for /bin/sh 
allow { ipsec_t ipsec_mgmt_t } bin_t:lnk_file read;

#
allow ipsec_mgmt_t self:process { sigchld signal };

# Allow read/write access to /var/run/pluto.ctl
allow ipsec_t ipsec_t:unix_stream_socket {create setopt bind listen accept read write };

# Pluto needs network access
can_network(ipsec_t)
allow ipsec_t ipsec_t:unix_dgram_socket { create connect write };

# for sleep
allow ipsec_mgmt_t fs_t:filesystem getattr;

# for the start script
can_exec(ipsec_mgmt_t, etc_t)

# allow access to /etc/localtime
allow ipsec_mgmt_t etc_t:file { read getattr };
allow ipsec_t etc_t:file { read getattr };

# allow access to /dev/null
allow ipsec_mgmt_t null_device_t:chr_file rw_file_perms;
allow ipsec_t null_device_t:chr_file rw_file_perms;

# Allow scripts to use /var/locl/subsys/ipsec
allow ipsec_mgmt_t var_lock_t:dir rw_dir_perms;
allow ipsec_mgmt_t var_lock_t:file create_file_perms;

# allow tncfg to create sockets
allow ipsec_mgmt_t ipsec_mgmt_t:udp_socket { create ioctl };

#When running ipsec auto --up <conname>
allow ipsec_t self:process { fork sigchld };
allow ipsec_t self:fifo_file { read getattr };

# ideally it would not need this.  It wants to write to /root/.rnd
file_type_auto_trans(ipsec_mgmt_t, sysadm_home_dir_t, sysadm_home_t, file)

allow ipsec_mgmt_t { initrc_devpts_t admin_tty_type }:chr_file { getattr read write ioctl };
allow ipsec_t initrc_devpts_t:chr_file { getattr read write };
allow ipsec_mgmt_t self:lnk_file read;

# sysadm can use ipsec tools
role sysadm_r types ipsec_t;
domain_auto_trans( sysadm_t, ipsec_exec_t, ipsec_t)