selinux-refpolicy/policy/mls

ifdef(`enable_mls',`
#
# Define sensitivities
#
# Domination of sensitivities is in increasin
# numerical order, with s0 being the lowest

gen_sens(mls_num_sens)

#
# Define the categories
#
# Generate declarations

gen_cats(mls_num_cats)

#
# Each MLS level specifies a sensitivity and zero or more categories which may
# be associated with that sensitivity.
#
# Generate levels from all sensitivities
# with all categories

gen_levels(mls_num_sens,mls_num_cats)

#
# Define the MLS policy
#
# mlsconstrain class_set perm_set expression ;
#
# mlsvalidatetrans class_set expression ;
#
# expression : ( expression )
#	     | not expression
#	     | expression and expression
#	     | expression or expression
#	     | u1 op u2
#	     | r1 role_mls_op r2
#	     | t1 op t2
#	     | l1 role_mls_op l2
#	     | l1 role_mls_op h2
#	     | h1 role_mls_op l2
#	     | h1 role_mls_op h2
#	     | l1 role_mls_op h1
#	     | l2 role_mls_op h2
#	     | u1 op names
#	     | u2 op names
#	     | r1 op names
#	     | r2 op names
#	     | t1 op names
#	     | t2 op names
#	     | u3 op names (NOTE: this is only available for mlsvalidatetrans)
#	     | r3 op names (NOTE: this is only available for mlsvalidatetrans)
#	     | t3 op names (NOTE: this is only available for mlsvalidatetrans)
#
# op : == | !=
# role_mls_op : == | != | eq | dom | domby | incomp
#
# names : name | { name_list }
# name_list : name | name_list name
#

#
# MLS policy for the file classes
#

# make sure these file classes are "single level"
mlsconstrain { file lnk_file fifo_file } { create relabelto }
	( l2 eq h2 );

# new file labels must be dominated by the relabeling subjects clearance
mlsconstrain { dir file lnk_file chr_file blk_file sock_file fifo_file } relabelto
	(( h1 dom h2 ) or
	(( t1 == mlsfilerelabeltoclr ) and ( h1 dom l2 )) or
	( t1 == mlsfilerelabel ));

# the file "read" ops (note the check is dominance of the low level)
mlsconstrain { dir file lnk_file chr_file blk_file sock_file fifo_file } { read getattr execute }
	(( l1 dom l2 ) or
	 (( t1 == mlsfilereadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsfileread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain dir search
	(( l1 dom l2 ) or
	 (( t1 == mlsfilereadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsfileread ) or
	 ( t2 == mlstrustedobject ));

# the "single level" file "write" ops
mlsconstrain { file lnk_file fifo_file dir chr_file blk_file sock_file } { write create setattr relabelfrom append unlink link rename mounton }
	(( l1 eq l2 ) or
	 (( t1 == mlsfilewritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsfilewriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsfilewrite ) or
	 ( t2 == mlstrustedobject ));

# Directory "write" ops
mlsconstrain dir { add_name remove_name reparent rmdir }
	(( l1 eq l2 ) or
	 (( t1 == mlsfilewriteinrange ) and ( l1 dom l2 ) and ( l1 domby h2 )) or
	 (( t1 == mlsfilewritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsfilewrite ) or
	 ( t2 == mlstrustedobject ));

# these access vectors have no MLS restrictions
# { dir file lnk_file chr_file blk_file sock_file fifo_file } { ioctl lock quotaon }
#
# { file } { execute_no_trans entrypoint execmod }
# { chr_file } { execmod }

# the file upgrade/downgrade rule
mlsvalidatetrans { dir file lnk_file chr_file blk_file sock_file fifo_file }
	((( l1 eq l2 ) or
	  (( t3 == mlsfileupgrade ) and ( l1 domby l2 )) or
	  (( t3 == mlsfiledowngrade ) and ( l1 dom l2 )) or
	  (( t3 == mlsfiledowngrade ) and ( l1 incomp l2 ))) and
	 (( h1 eq h2 ) or
	  (( t3 == mlsfileupgrade ) and ( h1 domby h2 )) or
	  (( t3 == mlsfiledowngrade ) and ( h1 dom h2 )) or
	  (( t3 == mlsfiledowngrade ) and ( h1 incomp h2 ))));

# create can also require the upgrade/downgrade checks if the creating process
# has used setfscreate (note that both the high and low level of the object
# default to the process sensitivity level)
mlsconstrain { dir file lnk_file chr_file blk_file sock_file fifo_file } create
	((( l1 eq l2 ) or
	  (( t1 == mlsfileupgrade ) and ( l1 domby l2 )) or
	  (( t1 == mlsfiledowngrade ) and ( l1 dom l2 )) or
	  (( t1 == mlsfiledowngrade ) and ( l1 incomp l2 ))) and
	 (( l1 eq h2 ) or
	  (( t1 == mlsfileupgrade ) and ( l1 domby h2 )) or
	  (( t1 == mlsfiledowngrade ) and ( l1 dom h2 )) or
	  (( t1 == mlsfiledowngrade ) and ( l1 incomp h2 ))));




#
# MLS policy for the filesystem class
#

# new filesystem labels must be dominated by the relabeling subjects clearance
mlsconstrain filesystem relabelto
	( h1 dom h2 );

# the filesystem "read" ops (implicit single level)
mlsconstrain filesystem { getattr quotaget }
	(( l1 dom l2 ) or
	 (( t1 == mlsfilereadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsfileread ));

# all the filesystem "write" ops (implicit single level)
mlsconstrain filesystem { mount remount unmount relabelfrom quotamod }
	(( l1 eq l2 ) or
	 (( t1 == mlsfilewritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsfilewrite ));

# these access vectors have no MLS restrictions
# filesystem { associate }




#
# MLS policy for the socket classes
#

# new socket labels must be dominated by the relabeling subjects clearance
mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket netlink_iscsi_socket netlink_fib_lookup_socket netlink_connector_socket netlink_netfilter_socket netlink_generic_socket netlink_scsitransport_socket netlink_rdma_socket netlink_crypto_socket sctp_socket } relabelto
	( h1 dom h2 );

# the socket "read+write" ops
# (Socket FDs are generally bidirectional, equivalent to open(..., O_RDWR),
# require equal levels for unprivileged subjects, or read *and* write overrides)
mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket sctp_socket } { accept connect }
	(( l1 eq l2 ) or
	 (((( t1 == mlsnetreadtoclr ) and ( h1 dom l2 )) or
	   ( t1 == mlsnetread )) and
	  ((( t1 == mlsnetwriteranged ) and ( l1 dom l2 ) and ( l1 domby h2 )) or
	   (( t1 == mlsnetwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	   ( t1 == mlsnetwrite ))));


# the socket "read" ops (note the check is dominance of the low level)
mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket netlink_iscsi_socket netlink_fib_lookup_socket netlink_connector_socket netlink_netfilter_socket netlink_generic_socket netlink_scsitransport_socket netlink_rdma_socket netlink_crypto_socket sctp_socket } { read getattr listen accept getopt }
	(( l1 dom l2 ) or
	 (( t1 == mlsnetreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsnetread ));

mlsconstrain { netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_xfrm_socket netlink_audit_socket netlink_ip6fw_socket } nlmsg_read
	(( l1 dom l2 ) or
	 (( t1 == mlsnetreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsnetread ));

# the socket "write" ops
mlsconstrain { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket netlink_iscsi_socket netlink_fib_lookup_socket netlink_connector_socket netlink_netfilter_socket netlink_generic_socket netlink_scsitransport_socket netlink_rdma_socket netlink_crypto_socket sctp_socket } { write setattr relabelfrom connect setopt shutdown }
	(( l1 eq l2 ) or
	 (( t1 == mlsnetwriteranged ) and ( l1 dom l2 ) and ( l1 domby h2 )) or
	 (( t1 == mlsnetwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsnetwrite ));

# used by netlabel to restrict normal domains to same level connections
mlsconstrain { tcp_socket udp_socket rawip_socket sctp_socket } recvfrom
	(( l1 eq l2 ) or
	 (( t1 == mlsnetreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsnetread ));

# UNIX domain socket ops
mlsconstrain unix_stream_socket connectto
	(( l1 eq l2 ) or
	 (( t1 == mlsnetwriteranged ) and ( l1 dom l2 ) and ( l1 domby h2 )) or
	 (( t1 == mlsnetwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsnetwrite ) or
	 ( t2 == mlstrustedobject ) or
	 ( t2 == mlstrustedsocket ));

mlsconstrain unix_dgram_socket sendto
	(( l1 eq l2 ) or
	 (( t1 == mlsnetwriteranged ) and ( l1 dom l2 ) and ( l1 domby h2 )) or
	 (( t1 == mlsnetwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsnetwrite ) or
	 ( t2 == mlstrustedobject ) or
	 ( t2 == mlstrustedsocket ));

# these access vectors have no MLS restrictions
# { socket tcp_socket udp_socket rawip_socket netlink_socket packet_socket key_socket unix_stream_socket unix_dgram_socket netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_nflog_socket netlink_xfrm_socket netlink_selinux_socket netlink_audit_socket netlink_ip6fw_socket netlink_dnrt_socket sctp_socket } { ioctl create lock append bind sendto name_bind }

#
# { tcp_socket udp_socket rawip_socket sctp_socket } node_bind
#
# { tcp_socket sctp_socket } name_connect
#
# { netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_xfrm_socket netlink_audit_socket netlink_ip6fw_socket } nlmsg_write
#
# netlink_audit_socket { nlmsg_relay nlmsg_readpriv }
#
# netlink_kobject_uevent_socket *
#




#
# MLS policy for the ipc classes
#

# the ipc "read" ops (implicit single level)
mlsconstrain { ipc sem msgq shm } { getattr read unix_read }
	(( l1 dom l2 ) or
	 (( t1 == mlsipcreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsipcread ));

mlsconstrain msg receive
	(( l1 dom l2 ) or
	 (( t1 == mlsipcreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsipcread ));

# the ipc "write" ops (implicit single level)
mlsconstrain { ipc sem msgq shm } { create destroy setattr write unix_write }
	(( l1 eq l2 ) or
	 (( t1 == mlsipcwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsipcwrite ));

mlsconstrain msgq enqueue
	(( l1 eq l2 ) or
	 (( t1 == mlsipcwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsipcwrite ));

mlsconstrain shm lock
	(( l1 eq l2 ) or
	 (( t1 == mlsipcwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsipcwrite ));

mlsconstrain msg send
	(( l1 eq l2 ) or
	 (( t1 == mlsipcwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsipcwrite ));

# these access vectors have no MLS restrictions
# { ipc sem msgq shm } associate


#
# MLS policy for the key class
#

mlsconstrain key { create link read search setattr view write }
	(( l1 eq l2 ) or
	 (( t1 == mlskeywritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlskeywrite ));


#
# MLS policy for the fd class
#

# No sharing of open file descriptors between levels unless
# the process type is authorized to use fds created by
# other levels (mlsfduse) or the fd type is authorized to
# shared among levels (mlsfdshare).
mlsconstrain fd use (
	l1 eq l2
	or t1 == mlsfduse
	or t2 == mlsfdshare
);

#
# MLS policy for the network ingress/egress controls
#

# the netif ingress/egress ops, the ingress permission is a "write" operation
# because the subject in this particular case is the remote domain which is
# writing data out the network interface which is acting as the object
mlsconstrain { netif } { ingress }
	((( l1 dom l2 ) and ( l1 domby h2 )) or
	 ( t1 == mlsnetinbound ) or
	 ( t1 == unlabeled_t ));
mlsconstrain { netif } { egress }
	((( l1 dom l2 ) and ( l1 domby h2 )) or
	 ( t1 == mlsnetoutbound ));

# the node recvfrom/sendto ops, the recvfrom permission is a "write" operation
# because the subject in this particular case is the remote domain which is
# writing data out the network node which is acting as the object
mlsconstrain { node } { recvfrom }
	((( l1 dom l2 ) and ( l1 domby h2 )) or
	 ( t1 == mlsnetinbound ) or
	 ( t1 == unlabeled_t ));
mlsconstrain { node } { sendto }
	((( l1 dom l2 ) and ( l1 domby h2 )) or
	 ( t1 == mlsnetoutbound ));

# the forward ops, the forward_in permission is a "write" operation because the
# subject in this particular case is the remote domain which is writing data
# to the network with a secmark label, the object in this case
mlsconstrain { packet } { forward_in }
	((( l1 dom l2 ) and ( l1 domby h2 )) or
	 ( t1 == mlsnetinbound ) or
	 ( t1 == unlabeled_t ));
mlsconstrain { packet } { forward_out }
	((( l1 dom l2 ) and ( l1 domby h2 )) or
	 ( t1 == mlsnetoutbound ) or
	 ( t1 == unlabeled_t ));

#
# MLS policy for the secmark and peer controls
#

# the peer/packet recv op
mlsconstrain { peer packet } { recv }
	(( l1 dom l2 ) or
	 (( t1 == mlsnetreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsnetread ));




#
# MLS policy for the process class
#

# new process labels must be dominated by the relabeling subjects clearance
# and sensitivity level changes require privilege
mlsconstrain process transition
	(( h1 dom h2 ) and
	 (( l1 eq l2 ) or ( t1 == mlsprocsetsl ) or
	  (( t1 == privrangetrans ) and ( t2 == mlsrangetrans ))));
mlsconstrain process dyntransition
	(( h1 dom h2 ) and
	 (( l1 eq l2 ) or ( t1 == mlsprocsetsl )));

# all the process "read" ops
mlsconstrain process { getsched getsession getpgid getcap getattr ptrace share }
	(( l1 dom l2 ) or
	 (( t1 == mlsprocreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsprocread ));

# all the process "write" ops (note the check is equality on the low level)
mlsconstrain process { sigkill sigstop signal setsched setpgid setcap setexec setfscreate setcurrent ptrace share }
	(( l1 eq l2 ) or
	 (( t1 == mlsprocwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsprocwrite ));

# these access vectors have no MLS restrictions
# process { fork sigchld signull noatsecure siginh setrlimit rlimitinh execmem execstack execheap }




#
# MLS policy for the security class
#

# these access vectors have no MLS restrictions
# security *




#
# MLS policy for the system class
#

# these access vectors have no MLS restrictions
# system *




#
# MLS policy for the capability class
#

# these access vectors have no MLS restrictions
# capability *




#
# MLS policy for the passwd class
#

# these access vectors have no MLS restrictions
# passwd *




#
# MLS policy for the x_drawable class
#

# the x_drawable "read" ops (implicit single level)
mlsconstrain x_drawable { read blend getattr list_child list_property get_property receive }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_drawable "write" ops (implicit single level)
mlsconstrain x_drawable { create destroy write setattr add_child remove_child send manage }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwrite ));

# No MLS restrictions: x_drawable { show hide override }


#
# MLS policy for the x_gc class
#

# the x_gc "read" ops (implicit single level)
mlsconstrain x_gc { getattr use }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_gc "write" ops (implicit single level)
mlsconstrain x_gc { create destroy setattr }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_font class
#

# the x_font "read" ops (implicit single level)
mlsconstrain x_font { use }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_font "write" ops (implicit single level)
mlsconstrain x_font { create destroy add_glyph remove_glyph }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwrite ));

# these access vectors have no MLS restrictions
# font use


#
# MLS policy for the x_colormap class
#

# the x_colormap "read" ops (implicit single level)
mlsconstrain x_colormap { read getattr use }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinreadcolormap ) or
	 ( t1 == mlsxwinread ));

# the x_colormap "write" ops (implicit single level)
mlsconstrain x_colormap { create destroy write add_color remove_color install uninstall }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwritecolormap ) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_property class
#

# the x_property "read" ops (implicit single level)
mlsconstrain x_property { read getattr }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinreadproperty ) or
	 ( t1 == mlsxwinread ));

# the x_property "write" ops (implicit single level)
mlsconstrain x_property { create destroy write append setattr }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwriteproperty ) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_selection class
#

# the x_selection "read" ops (implicit single level)
mlsconstrain x_selection { read getattr }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinreadselection ) or
	 ( t1 == mlsxwinread ));

# the x_selection "write" ops (implicit single level)
mlsconstrain x_selection { write setattr }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwriteselection ) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_cursor class
#

# the x_cursor "read" ops (implicit single level)
mlsconstrain x_cursor { read getattr use }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_cursor "write" ops (implicit single level)
mlsconstrain x_cursor { create destroy write setattr }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_client class
#

# the x_client "read" ops (implicit single level)
mlsconstrain x_client { getattr }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_client "write" ops (implicit single level)
mlsconstrain x_client { destroy setattr manage }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_device class
#

# the x_device "read" ops (implicit single level)
mlsconstrain x_device { getattr use read getfocus grab }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_device "write" ops (implicit single level)
mlsconstrain x_device { setattr write setfocus bell force_cursor freeze manage }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwritexinput ) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_server class
#

# these access vectors have no MLS restrictions
# x_server *


#
# MLS policy for the x_extension class
#

# these access vectors have no MLS restrictions
# x_extension { query use }


#
# MLS policy for the x_resource class
#

# the x_resource "read" ops (implicit single level)
mlsconstrain x_resource { read }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_resource "write" ops (implicit single level)
mlsconstrain x_resource { write }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwritexinput ) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_event class
#

# the x_event "read" ops (implicit single level)
mlsconstrain x_event { receive }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_event "write" ops (implicit single level)
mlsconstrain x_event { send }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwritexinput ) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_application_data class
#

# the x_application_data "paste" ops
mlsconstrain x_application_data { paste }
	( l1 domby l2 );

# the x_application_data "paste_after_confirm" ops
mlsconstrain x_application_data { paste_after_confirm }
	( l1 dom l2 );


#
# MLS policy for the x_pointer class
#

# the x_pointer "read" ops
mlsconstrain x_pointer { getattr use read getfocus grab }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_pointer "write" ops (implicit single level)
mlsconstrain x_pointer { setattr write setfocus bell force_cursor freeze manage }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwritexinput ) or
	 ( t1 == mlsxwinwrite ));


#
# MLS policy for the x_keyboard class
#

# the x_keyboard "read" ops
mlsconstrain x_keyboard { getattr use read getfocus grab }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the x_keyboard "write" ops (implicit single level)
mlsconstrain x_keyboard { setattr write setfocus bell force_cursor freeze manage }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwritexinput ) or
	 ( t1 == mlsxwinwrite ));



#
# MLS policy for the dbus class
#

mlsconstrain dbus { send_msg }
	(( l1 eq l2 ) or
	 ( t1 == mlsdbussend ) or
	 ( t2 == mlsdbusrecv ));

# these access vectors have no MLS restrictions
# dbus { acquire_svc }




#
# MLS policy for the nscd class
#

# these access vectors have no MLS restrictions
# nscd { getpwd getgrp gethost getstat admin shmempwd shmemgrp shmemhost }




#
# MLS policy for the association class
#

mlsconstrain association { recvfrom }
	((( l1 dom l2 ) and ( l1 domby h2 )) or
	 (( t1 == mlsnetreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsnetread ) or
	 ( t2 == unlabeled_t ));

mlsconstrain association { sendto }
	(( l1 eq l2 ) or
	 (( t1 == mlsnetwriteranged ) and ( l1 dom l2 ) and ( l1 domby h2 )) or
	 ( t2 == unlabeled_t ));

mlsconstrain association { polmatch }
	(( l1 dom l2 ) and ( h1 domby h2 ));



#
# MLS policy for the context class
#

mlsconstrain context contains
	(( h1 dom h2 ) and ( l1 domby l2));

#
# MLS policy for database classes
#

# make sure these database classes are "single level"
mlsconstrain { db_sequence db_view db_procedure db_language db_blob } { create relabelto }
	( l2 eq h2 );

mlsconstrain { db_tuple } { insert relabelto }
	( l2 eq h2 );

# new database labels must be dominated by the relabeling subjects clearance
mlsconstrain { db_database db_schema db_table db_column } { relabelto }
	( h1 dom h2 );

# the database "read" ops (note the check is dominance of the low level)
mlsconstrain { db_database } { getattr access get_param }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_schema } { getattr search }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_table } { getattr select lock }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_column } { getattr select }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_sequence } { getattr get_value next_value }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_view } { getattr expand }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_procedure } { getattr execute entrypoint install }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_language } { getattr execute }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_blob } { getattr read export }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_tuple } { use select }
	(( l1 dom l2 ) or
	 (( t1 == mlsdbreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsdbread ) or
	 ( t2 == mlstrustedobject ));

# the "single level" database "write" ops
mlsconstrain { db_database } { create drop setattr relabelfrom install_module load_module set_param }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_schema } { create drop setattr relabelfrom add_name remove_name }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_table } { create drop setattr relabelfrom update insert delete }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_column } { create drop setattr relabelfrom update insert }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_sequence } { create drop setattr relabelfrom set_value }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_view } { create drop setattr relabelfrom }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_procedure } { create drop setattr relabelfrom }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_language } { create drop setattr relabelfrom }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_blob } { create drop setattr relabelfrom write import }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain { db_tuple } { relabelfrom update insert delete }
	(( l1 eq l2 ) or
	 (( t1 == mlsdbwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 (( t2 == mlsdbwriteinrange ) and ( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t1 == mlsdbwrite ) or
	 ( t2 == mlstrustedobject ));

# the database upgrade/downgrade rule
mlsvalidatetrans { db_database db_schema db_table db_sequence db_view db_procedure db_language db_column db_tuple db_blob }
	((( l1 eq l2 ) or
	  (( t3 == mlsdbupgrade ) and ( l1 domby l2 )) or
	  (( t3 == mlsdbdowngrade ) and ( l1 dom l2 )) or
	  (( t3 == mlsdbdowngrade ) and ( l1 incomp l2 ))) and
	 (( l1 eq h2 ) or
	  (( t3 == mlsdbupgrade ) and ( h1 domby h2 )) or
	  (( t3 == mlsdbdowngrade ) and ( h1 dom h2 )) or
	  (( t3 == mlsdbdowngrade ) and ( h1 incomp h2 ))));

') dnl end enable_mls