selinux-policy/strict/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;


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


#
# 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;


#
# Each MLS level specifies a sensitivity and zero or more categories which may
# be associated with that sensitivity.
#
level s0:c0.c127;
level s1:c0.c127;
level s2:c0.c127;
level s3:c0.c127;
level s4:c0.c127;
level s5:c0.c127;
level s6:c0.c127;
level s7:c0.c127;
level s8:c0.c127;
level s9:c0.c127;


#
# 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 subject's 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 } { 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 ));

# the "ranged" file "write" ops
mlsconstrain { dir chr_file blk_file sock_file } { write create setattr relabelfrom append unlink link rename mounton }
	((( l1 dom l2 ) and ( l1 domby h2 )) 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 subject's 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 subject's 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 }
#
# { netlink_route_socket netlink_firewall_socket netlink_tcpdiag_socket netlink_xfrm_socket netlink_audit_socket netlink_ip6fw_socket } nlmsg_write
#




#
# 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
#

# these access vectors have no MLS restrictions
# fd use




#
# 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
# { netif node } { enforce_dest }




#
# MLS policy for the process class
#

# new process labels must be dominated by the relabeling subject's 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 }




#
# 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 ));

# 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 == 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 == 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 == 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 == 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
#

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

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




#
# MLS policy for the xserver class
#

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

# the xserver "write" ops (implicit single level)
mlsconstrain xserver { sethostlist setfontpath grab ungrab screensaver }
	(( l1 eq l2 ) or
	 (( t1 == mlsxwinwritetoclr ) and ( h1 dom l2 ) and ( l1 domby l2 )) or
	 ( t1 == mlsxwinwrite ));




#
# MLS policy for the xextension class
#

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

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


#
# 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
#

# these access vectors have no MLS restrictions
# association { sendto recvfrom }