selinux-refpolicy/policy/mls

ifdef(`enable_mls',`
#
# Define sensitivities 
#
# Each sensitivity has a name and zero or more aliases.
#
sensitivity s0;
sensitivity s1;
sensitivity s2;
sensitivity s3;
sensitivity s4;
sensitivity s5;
sensitivity s6;
sensitivity s7;
sensitivity s8;
sensitivity s9;
sensitivity s10;
sensitivity s11;
sensitivity s12;
sensitivity s13;
sensitivity s14;
sensitivity s15;

#
# Define the ordering of the sensitivity levels (least to greatest)
#
dominance { s0 s1 s2 s3 s4 s5 s6 s7 s8 s9 s10 s11 s12 s13 s14 s15 }


#
# Define the categories
#
# Each category has a name and zero or more aliases.
#
category c0; category c1; category c2; category c3;
category c4; category c5; category c6; category c7;
category c8; category c9; category c10; category c11;
category c12; category c13; category c14; category c15;
category c16; category c17; category c18; category c19;
category c20; category c21; category c22; category c23;
category c24; category c25; category c26; category c27;
category c28; category c29; category c30; category c31;
category c32; category c33; category c34; category c35;
category c36; category c37; category c38; category c39;
category c40; category c41; category c42; category c43;
category c44; category c45; category c46; category c47;
category c48; category c49; category c50; category c51;
category c52; category c53; category c54; category c55;
category c56; category c57; category c58; category c59;
category c60; category c61; category c62; category c63;
category c64; category c65; category c66; category c67;
category c68; category c69; category c70; category c71;
category c72; category c73; category c74; category c75;
category c76; category c77; category c78; category c79;
category c80; category c81; category c82; category c83;
category c84; category c85; category c86; category c87;
category c88; category c89; category c90; category c91;
category c92; category c93; category c94; category c95;
category c96; category c97; category c98; category c99;
category c100; category c101; category c102; category c103;
category c104; category c105; category c106; category c107;
category c108; category c109; category c110; category c111;
category c112; category c113; category c114; category c115;
category c116; category c117; category c118; category c119;
category c120; category c121; category c122; category c123;
category c124; category c125; category c126; category c127;
category c128; category c129; category c130; category c131;
category c132; category c133; category c134; category c135;
category c136; category c137; category c138; category c139;
category c140; category c141; category c142; category c143;
category c144; category c145; category c146; category c147;
category c148; category c149; category c150; category c151;
category c152; category c153; category c154; category c155;
category c156; category c157; category c158; category c159;
category c160; category c161; category c162; category c163;
category c164; category c165; category c166; category c167;
category c168; category c169; category c170; category c171;
category c172; category c173; category c174; category c175;
category c176; category c177; category c178; category c179;
category c180; category c181; category c182; category c183;
category c184; category c185; category c186; category c187;
category c188; category c189; category c190; category c191;
category c192; category c193; category c194; category c195;
category c196; category c197; category c198; category c199;
category c200; category c201; category c202; category c203;
category c204; category c205; category c206; category c207;
category c208; category c209; category c210; category c211;
category c212; category c213; category c214; category c215;
category c216; category c217; category c218; category c219;
category c220; category c221; category c222; category c223;
category c224; category c225; category c226; category c227;
category c228; category c229; category c230; category c231;
category c232; category c233; category c234; category c235;
category c236; category c237; category c238; category c239;
category c240; category c241; category c242; category c243;
category c244; category c245; category c246; category c247;
category c248; category c249; category c250; category c251;
category c252; category c253; category c254; category c255;


#
# Each MLS level specifies a sensitivity and zero or more categories which may
# be associated with that sensitivity.
#
level s0:c0.c255;
level s1:c0.c255;
level s2:c0.c255;
level s3:c0.c255;
level s4:c0.c255;
level s5:c0.c255;
level s6:c0.c255;
level s7:c0.c255;
level s8:c0.c255;
level s9:c0.c255;
level s10:c0.c255;
level s11:c0.c255;
level s12:c0.c255;
level s13:c0.c255;
level s14:c0.c255;
level s15:c0.c255;


#
# 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 );

# 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
	 ( t1 == mlsfilewrite ) or
	 ( t2 == mlstrustedobject ));

mlsconstrain dir { add_name remove_name reparent rmdir }
	((( 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 swapon quotaon }
#
# { file chr_file } { execute_no_trans entrypoint 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 { transition 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 } relabelto
	( h1 dom h2 );

# 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 } { read getattr listen accept getopt recvfrom recv_msg }
	(( 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 } { write setattr relabelfrom connect setopt shutdown }
	((( l1 dom l2 ) and ( l1 domby h2 )) or
	 (( t1 == mlsnetwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsnetwrite ));

# 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 } { ioctl create lock append bind sendto send_msg name_bind }
#
# { tcp_socket udp_socket rawip_socket } node_bind
#
# { tcp_socket unix_stream_socket } { connectto newconn acceptfrom }
#
# tcp_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 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 object classes
#

# the netif/node "read" ops (implicit single level socket doing the read)
#                           (note the check is dominance of the low level)
mlsconstrain { node netif } { tcp_recv udp_recv rawip_recv }
	(( l1 dom l2 ) or ( t1 == mlsnetrecvall ));

# the netif/node "write" ops (implicit single level socket doing the write)
mlsconstrain { netif node } { tcp_send udp_send rawip_send }
	(( l1 dom l2 ) and ( l1 domby h2 ));

# these access vectors have no MLS restrictions
# node enforce_dest




#
# 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 drawable class
#

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

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




#
# MLS policy for the gc class
#

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

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




#
# MLS policy for the window class
#

# the window "read" ops (implicit single level)
mlsconstrain window { listprop getattr enumerate mousemotion inputevent drawevent windowchangeevent windowchangerequest serverchangeevent extensionevent }
	(( l1 dom l2 ) or
	 (( t1 == mlsxwinreadtoclr ) and ( h1 dom l2 )) or
	 ( t1 == mlsxwinread ));

# the window "write" ops (implicit single level)
mlsconstrain window { addchild create destroy chstack chproplist chprop setattr setfocus move chselection chparent ctrllife transparent clientcomevent }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwrite ) or
	 ( t2 == mlstrustedobject ));

# these access vectors have no MLS restrictions
# window { map unmap }




#
# MLS policy for the font class
#

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

# the font "write" ops (implicit single level)
mlsconstrain font free
	(( 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 colormap class
#

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

# the colormap "write" ops (implicit single level)
mlsconstrain colormap { create free install uninstall store setattr }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwritecolormap ) or
	 ( t1 == mlsxwinwrite ));




#
# MLS policy for the property class
#

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

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




#
# MLS policy for the cursor class
#

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




#
# MLS policy for the xclient class
#

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




#
# MLS policy for the xinput class
#

# these access vectors have no MLS restrictions
# xinput ~{ relabelinput setattr }

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




#
# MLS policy for the xserver class
#

# these access vectors have no MLS restrictions
# xserver *




#
# MLS policy for the xextension class
#

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


#
# MLS policy for the pax class
#

# these access vectors have no MLS restrictions
# pax { pageexec emutramp mprotect randmmap randexec segmexec }




#
# MLS policy for the dbus class
#

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




#
# 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 dom l2 ) and ( l1 domby h2 )) or
	 ( t2 == unlabeled_t ));

mlsconstrain association { polmatch }
	((( l1 dom l2 ) and ( h1 domby h2 )) or
	 ( t2 == unlabeled_t ));

') dnl end enable_mls