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platform_external_selinux/checkpolicy/policy_parse.y
Joshua Brindle 9ba35fe8c2 Add default_range glblub support 
Policy developers can set a default_range default to glblub and
computed contexts will be the intersection of the ranges of the
source and target contexts. This can be used by MLS userspace
object managers to find the range of clearances that two contexts
have in common. An example usage is computing a transition between
the network context and the context of a user logging into an MLS
application.

For example, one can add a default with
this cil:

(defaultrange db_table glblub)

or in te (base module only):

default_range db_table glblub;

and then test using the compute_create utility:

$ ./compute_create system_u:system_r:kernel_t:s0:c1,c2,c5-s0:c1.c20 system_u:system_r:kernel_t:s0:c0.c20-s0:c0.c36 db_table
system_u:object_r:kernel_t:s0:c1,c2,c5-s0:c1.c20

Some example range transitions are:

User Permitted Range | Network Device Label | Computed Label
---------------------|----------------------|----------------
s0-s1:c0.c12         | s0                   | s0
s0-s1:c0.c12         | s0-s1:c0.c1023       | s0-s1:c0.c12
s0-s4:c0.c512        | s1-s1:c0.c1023       | s1-s1:c0.c512
s0-s15:c0,c2         | s4-s6:c0.c128        | s4-s6:c0,c2
s0-s4                | s2-s6                | s2-s4
s0-s4                | s5-s8                | INVALID
s5-s8                | s0-s4                | INVALID

Signed-off-by: Joshua Brindle <joshua.brindle@crunchydata.com>
2019-09-10 12:30:29 -04:00

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/*
* Author : Stephen Smalley, <sds@tycho.nsa.gov>
*/
/*
* Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
*
* Support for enhanced MLS infrastructure.
*
* Updated: David Caplan, <dac@tresys.com>
*
* Added conditional policy language extensions
*
* Updated: Joshua Brindle <jbrindle@tresys.com>
* Karl MacMillan <kmacmillan@mentalrootkit.com>
* Jason Tang <jtang@tresys.com>
*
* Added support for binary policy modules
*
* Copyright (C) 2004-2005 Trusted Computer Solutions, Inc.
* Copyright (C) 2003 - 2008 Tresys Technology, LLC
* Copyright (C) 2007 Red Hat Inc.
* Copyright (C) 2017 Mellanox Technologies Inc.
* This program 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, version 2.
*/
/* FLASK */
%{
#include <sys/types.h>
#include <assert.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sepol/policydb/expand.h>
#include <sepol/policydb/policydb.h>
#include <sepol/policydb/services.h>
#include <sepol/policydb/conditional.h>
#include <sepol/policydb/flask.h>
#include <sepol/policydb/hierarchy.h>
#include <sepol/policydb/polcaps.h>
#include "queue.h"
#include "checkpolicy.h"
#include "module_compiler.h"
#include "policy_define.h"
extern policydb_t *policydbp;
extern unsigned int pass;
extern char yytext[];
extern int yylex(void);
extern int yywarn(const char *msg);
extern int yyerror(const char *msg);
typedef int (* require_func_t)(int pass);
%}
%union {
unsigned int val;
uint64_t val64;
uintptr_t valptr;
void *ptr;
require_func_t require_func;
}
%type <ptr> cond_expr cond_expr_prim cond_pol_list cond_else
%type <ptr> cond_allow_def cond_auditallow_def cond_auditdeny_def cond_dontaudit_def
%type <ptr> cond_transition_def cond_te_avtab_def cond_rule_def
%type <ptr> role_def roles
%type <valptr> cexpr cexpr_prim op role_mls_op
%type <val> ipv4_addr_def number
%type <val64> number64
%type <require_func> require_decl_def
%token PATH
%token QPATH
%token FILENAME
%token CLONE
%token COMMON
%token CLASS
%token CONSTRAIN
%token VALIDATETRANS
%token INHERITS
%token SID
%token ROLE
%token ROLEATTRIBUTE
%token ATTRIBUTE_ROLE
%token ROLES
%token TYPEALIAS
%token TYPEATTRIBUTE
%token TYPEBOUNDS
%token TYPE
%token TYPES
%token ALIAS
%token ATTRIBUTE
%token EXPANDATTRIBUTE
%token BOOL
%token TUNABLE
%token IF
%token ELSE
%token TYPE_TRANSITION
%token TYPE_MEMBER
%token TYPE_CHANGE
%token ROLE_TRANSITION
%token RANGE_TRANSITION
%token SENSITIVITY
%token DOMINANCE
%token DOM DOMBY INCOMP
%token CATEGORY
%token LEVEL
%token RANGE
%token MLSCONSTRAIN
%token MLSVALIDATETRANS
%token USER
%token NEVERALLOW
%token ALLOW
%token AUDITALLOW
%token AUDITDENY
%token DONTAUDIT
%token ALLOWXPERM
%token AUDITALLOWXPERM
%token DONTAUDITXPERM
%token NEVERALLOWXPERM
%token SOURCE
%token TARGET
%token SAMEUSER
%token FSCON PORTCON NETIFCON NODECON
%token IBPKEYCON
%token IBENDPORTCON
%token PIRQCON IOMEMCON IOPORTCON PCIDEVICECON DEVICETREECON
%token FSUSEXATTR FSUSETASK FSUSETRANS
%token GENFSCON
%token U1 U2 U3 R1 R2 R3 T1 T2 T3 L1 L2 H1 H2
%token NOT AND OR XOR
%token CTRUE CFALSE
%token IDENTIFIER
%token NUMBER
%token EQUALS
%token NOTEQUAL
%token IPV4_ADDR
%token IPV6_ADDR
%token MODULE VERSION_IDENTIFIER REQUIRE OPTIONAL
%token POLICYCAP
%token PERMISSIVE
%token FILESYSTEM
%token DEFAULT_USER DEFAULT_ROLE DEFAULT_TYPE DEFAULT_RANGE
%token LOW_HIGH LOW HIGH GLBLUB
%left OR
%left XOR
%left AND
%right NOT
%left EQUALS NOTEQUAL
%%
policy : base_policy
| module_policy
;
base_policy : { if (define_policy(pass, 0) == -1) return -1; }
classes initial_sids access_vectors
{ if (pass == 1) { if (policydb_index_classes(policydbp)) return -1; }
else if (pass == 2) { if (policydb_index_others(NULL, policydbp, 0)) return -1; }}
opt_default_rules opt_mls te_rbac users opt_constraints
{ if (pass == 1) { if (policydb_index_bools(policydbp)) return -1;}
else if (pass == 2) { if (policydb_index_others(NULL, policydbp, 0)) return -1;}}
initial_sid_contexts opt_fs_contexts opt_fs_uses opt_genfs_contexts net_contexts opt_dev_contexts opt_ibpkey_contexts opt_ibendport_contexts
;
classes : class_def
| classes class_def
;
class_def : CLASS identifier
{if (define_class()) return -1;}
;
initial_sids : initial_sid_def
| initial_sids initial_sid_def
;
initial_sid_def : SID identifier
{if (define_initial_sid()) return -1;}
;
access_vectors : opt_common_perms av_perms
;
opt_common_perms : common_perms
|
;
common_perms : common_perms_def
| common_perms common_perms_def
;
common_perms_def : COMMON identifier '{' identifier_list '}'
{if (define_common_perms()) return -1;}
;
av_perms : av_perms_def
| av_perms av_perms_def
;
av_perms_def : CLASS identifier '{' identifier_list '}'
{if (define_av_perms(FALSE)) return -1;}
| CLASS identifier INHERITS identifier
{if (define_av_perms(TRUE)) return -1;}
| CLASS identifier INHERITS identifier '{' identifier_list '}'
{if (define_av_perms(TRUE)) return -1;}
;
opt_default_rules : default_rules
|
;
default_rules : default_user_def
| default_role_def
| default_type_def
| default_range_def
| default_rules default_user_def
| default_rules default_role_def
| default_rules default_type_def
| default_rules default_range_def
;
default_user_def : DEFAULT_USER names SOURCE ';'
{if (define_default_user(DEFAULT_SOURCE)) return -1; }
| DEFAULT_USER names TARGET ';'
{if (define_default_user(DEFAULT_TARGET)) return -1; }
;
default_role_def : DEFAULT_ROLE names SOURCE ';'
{if (define_default_role(DEFAULT_SOURCE)) return -1; }
| DEFAULT_ROLE names TARGET ';'
{if (define_default_role(DEFAULT_TARGET)) return -1; }
;
default_type_def : DEFAULT_TYPE names SOURCE ';'
{if (define_default_type(DEFAULT_SOURCE)) return -1; }
| DEFAULT_TYPE names TARGET ';'
{if (define_default_type(DEFAULT_TARGET)) return -1; }
;
default_range_def : DEFAULT_RANGE names SOURCE LOW ';'
{if (define_default_range(DEFAULT_SOURCE_LOW)) return -1; }
| DEFAULT_RANGE names SOURCE HIGH ';'
{if (define_default_range(DEFAULT_SOURCE_HIGH)) return -1; }
| DEFAULT_RANGE names SOURCE LOW_HIGH ';'
{if (define_default_range(DEFAULT_SOURCE_LOW_HIGH)) return -1; }
| DEFAULT_RANGE names TARGET LOW ';'
{if (define_default_range(DEFAULT_TARGET_LOW)) return -1; }
| DEFAULT_RANGE names TARGET HIGH ';'
{if (define_default_range(DEFAULT_TARGET_HIGH)) return -1; }
| DEFAULT_RANGE names TARGET LOW_HIGH ';'
{if (define_default_range(DEFAULT_TARGET_LOW_HIGH)) return -1; }
| DEFAULT_RANGE names GLBLUB';'
{if (define_default_range(DEFAULT_GLBLUB)) return -1; }
;
opt_mls : mls
|
;
mls : sensitivities dominance opt_categories levels mlspolicy
;
sensitivities : sensitivity_def
| sensitivities sensitivity_def
;
sensitivity_def : SENSITIVITY identifier alias_def ';'
{if (define_sens()) return -1;}
| SENSITIVITY identifier ';'
{if (define_sens()) return -1;}
;
alias_def : ALIAS names
;
dominance : DOMINANCE identifier
{if (define_dominance()) return -1;}
| DOMINANCE '{' identifier_list '}'
{if (define_dominance()) return -1;}
;
opt_categories : categories
|
;
categories : category_def
| categories category_def
;
category_def : CATEGORY identifier alias_def ';'
{if (define_category()) return -1;}
| CATEGORY identifier ';'
{if (define_category()) return -1;}
;
levels : level_def
| levels level_def
;
level_def : LEVEL identifier ':' id_comma_list ';'
{if (define_level()) return -1;}
| LEVEL identifier ';'
{if (define_level()) return -1;}
;
mlspolicy : mlspolicy_decl
| mlspolicy mlspolicy_decl
;
mlspolicy_decl : mlsconstraint_def
| mlsvalidatetrans_def
;
mlsconstraint_def : MLSCONSTRAIN names names cexpr ';'
{ if (define_constraint((constraint_expr_t*)$4)) return -1; }
;
mlsvalidatetrans_def : MLSVALIDATETRANS names cexpr ';'
{ if (define_validatetrans((constraint_expr_t*)$3)) return -1; }
;
te_rbac : te_rbac_decl
| te_rbac te_rbac_decl
;
te_rbac_decl : te_decl
| rbac_decl
| cond_stmt_def
| optional_block
| policycap_def
| ';'
;
rbac_decl : attribute_role_def
| role_type_def
| role_dominance
| role_trans_def
| role_allow_def
| roleattribute_def
| role_attr_def
;
te_decl : attribute_def
| expandattribute_def
| type_def
| typealias_def
| typeattribute_def
| typebounds_def
| bool_def
| tunable_def
| transition_def
| range_trans_def
| te_avtab_def
| permissive_def
;
attribute_def : ATTRIBUTE identifier ';'
{ if (define_attrib()) return -1;}
;
expandattribute_def : EXPANDATTRIBUTE names bool_val ';'
{ if (expand_attrib()) return -1;}
;
type_def : TYPE identifier alias_def opt_attr_list ';'
{if (define_type(1)) return -1;}
| TYPE identifier opt_attr_list ';'
{if (define_type(0)) return -1;}
;
typealias_def : TYPEALIAS identifier alias_def ';'
{if (define_typealias()) return -1;}
;
typeattribute_def : TYPEATTRIBUTE identifier id_comma_list ';'
{if (define_typeattribute()) return -1;}
;
typebounds_def : TYPEBOUNDS identifier id_comma_list ';'
{if (define_typebounds()) return -1;}
;
opt_attr_list : ',' id_comma_list
|
;
bool_def : BOOL identifier bool_val ';'
{ if (define_bool_tunable(0)) return -1; }
;
tunable_def : TUNABLE identifier bool_val ';'
{ if (define_bool_tunable(1)) return -1; }
;
bool_val : CTRUE
{ if (insert_id("T",0)) return -1; }
| CFALSE
{ if (insert_id("F",0)) return -1; }
;
cond_stmt_def : IF cond_expr '{' cond_pol_list '}' cond_else
{ if (pass == 2) { if (define_conditional((cond_expr_t*)$2, (avrule_t*)$4, (avrule_t*)$6) < 0) return -1; }}
;
cond_else : ELSE '{' cond_pol_list '}'
{ $$ = $3; }
| /* empty */
{ $$ = NULL; }
;
cond_expr : '(' cond_expr ')'
{ $$ = $2;}
| NOT cond_expr
{ $$ = define_cond_expr(COND_NOT, $2, 0);
if ($$ == 0) return -1; }
| cond_expr AND cond_expr
{ $$ = define_cond_expr(COND_AND, $1, $3);
if ($$ == 0) return -1; }
| cond_expr OR cond_expr
{ $$ = define_cond_expr(COND_OR, $1, $3);
if ($$ == 0) return -1; }
| cond_expr XOR cond_expr
{ $$ = define_cond_expr(COND_XOR, $1, $3);
if ($$ == 0) return -1; }
| cond_expr EQUALS cond_expr
{ $$ = define_cond_expr(COND_EQ, $1, $3);
if ($$ == 0) return -1; }
| cond_expr NOTEQUAL cond_expr
{ $$ = define_cond_expr(COND_NEQ, $1, $3);
if ($$ == 0) return -1; }
| cond_expr_prim
{ $$ = $1; }
;
cond_expr_prim : identifier
{ $$ = define_cond_expr(COND_BOOL,0, 0);
if ($$ == COND_ERR) return -1; }
;
cond_pol_list : cond_pol_list cond_rule_def
{ $$ = define_cond_pol_list((avrule_t *)$1, (avrule_t *)$2); }
| /* empty */
{ $$ = NULL; }
;
cond_rule_def : cond_transition_def
{ $$ = $1; }
| cond_te_avtab_def
{ $$ = $1; }
| require_block
{ $$ = NULL; }
;
cond_transition_def : TYPE_TRANSITION names names ':' names identifier filename ';'
{ $$ = define_cond_filename_trans() ;
if ($$ == COND_ERR) return -1;}
| TYPE_TRANSITION names names ':' names identifier ';'
{ $$ = define_cond_compute_type(AVRULE_TRANSITION) ;
if ($$ == COND_ERR) return -1;}
| TYPE_MEMBER names names ':' names identifier ';'
{ $$ = define_cond_compute_type(AVRULE_MEMBER) ;
if ($$ == COND_ERR) return -1;}
| TYPE_CHANGE names names ':' names identifier ';'
{ $$ = define_cond_compute_type(AVRULE_CHANGE) ;
if ($$ == COND_ERR) return -1;}
;
cond_te_avtab_def : cond_allow_def
{ $$ = $1; }
| cond_auditallow_def
{ $$ = $1; }
| cond_auditdeny_def
{ $$ = $1; }
| cond_dontaudit_def
{ $$ = $1; }
;
cond_allow_def : ALLOW names names ':' names names ';'
{ $$ = define_cond_te_avtab(AVRULE_ALLOWED) ;
if ($$ == COND_ERR) return -1; }
;
cond_auditallow_def : AUDITALLOW names names ':' names names ';'
{ $$ = define_cond_te_avtab(AVRULE_AUDITALLOW) ;
if ($$ == COND_ERR) return -1; }
;
cond_auditdeny_def : AUDITDENY names names ':' names names ';'
{ $$ = define_cond_te_avtab(AVRULE_AUDITDENY) ;
if ($$ == COND_ERR) return -1; }
;
cond_dontaudit_def : DONTAUDIT names names ':' names names ';'
{ $$ = define_cond_te_avtab(AVRULE_DONTAUDIT);
if ($$ == COND_ERR) return -1; }
;
;
transition_def : TYPE_TRANSITION names names ':' names identifier filename ';'
{if (define_filename_trans()) return -1; }
| TYPE_TRANSITION names names ':' names identifier ';'
{if (define_compute_type(AVRULE_TRANSITION)) return -1;}
| TYPE_MEMBER names names ':' names identifier ';'
{if (define_compute_type(AVRULE_MEMBER)) return -1;}
| TYPE_CHANGE names names ':' names identifier ';'
{if (define_compute_type(AVRULE_CHANGE)) return -1;}
;
range_trans_def : RANGE_TRANSITION names names mls_range_def ';'
{ if (define_range_trans(0)) return -1; }
| RANGE_TRANSITION names names ':' names mls_range_def ';'
{ if (define_range_trans(1)) return -1; }
;
te_avtab_def : allow_def
| auditallow_def
| auditdeny_def
| dontaudit_def
| neverallow_def
| xperm_allow_def
| xperm_auditallow_def
| xperm_dontaudit_def
| xperm_neverallow_def
;
allow_def : ALLOW names names ':' names names ';'
{if (define_te_avtab(AVRULE_ALLOWED)) return -1; }
;
auditallow_def : AUDITALLOW names names ':' names names ';'
{if (define_te_avtab(AVRULE_AUDITALLOW)) return -1; }
;
auditdeny_def : AUDITDENY names names ':' names names ';'
{if (define_te_avtab(AVRULE_AUDITDENY)) return -1; }
;
dontaudit_def : DONTAUDIT names names ':' names names ';'
{if (define_te_avtab(AVRULE_DONTAUDIT)) return -1; }
;
neverallow_def : NEVERALLOW names names ':' names names ';'
{if (define_te_avtab(AVRULE_NEVERALLOW)) return -1; }
;
xperm_allow_def : ALLOWXPERM names names ':' names identifier xperms ';'
{if (define_te_avtab_extended_perms(AVRULE_XPERMS_ALLOWED)) return -1; }
;
xperm_auditallow_def : AUDITALLOWXPERM names names ':' names identifier xperms ';'
{if (define_te_avtab_extended_perms(AVRULE_XPERMS_AUDITALLOW)) return -1; }
;
xperm_dontaudit_def : DONTAUDITXPERM names names ':' names identifier xperms ';'
{if (define_te_avtab_extended_perms(AVRULE_XPERMS_DONTAUDIT)) return -1; }
;
xperm_neverallow_def : NEVERALLOWXPERM names names ':' names identifier xperms ';'
{if (define_te_avtab_extended_perms(AVRULE_XPERMS_NEVERALLOW)) return -1; }
;
attribute_role_def : ATTRIBUTE_ROLE identifier ';'
{if (define_attrib_role()) return -1; }
;
role_type_def : ROLE identifier TYPES names ';'
{if (define_role_types()) return -1;}
;
role_attr_def : ROLE identifier opt_attr_list ';'
{if (define_role_attr()) return -1;}
;
role_dominance : DOMINANCE '{' roles '}'
;
role_trans_def : ROLE_TRANSITION names names identifier ';'
{if (define_role_trans(0)) return -1; }
| ROLE_TRANSITION names names ':' names identifier ';'
{if (define_role_trans(1)) return -1;}
;
role_allow_def : ALLOW names names ';'
{if (define_role_allow()) return -1; }
;
roles : role_def
{ $$ = $1; }
| roles role_def
{ $$ = merge_roles_dom((role_datum_t*)$1, (role_datum_t*)$2); if ($$ == 0) return -1;}
;
role_def : ROLE identifier_push ';'
{$$ = define_role_dom(NULL); if ($$ == 0) return -1;}
| ROLE identifier_push '{' roles '}'
{$$ = define_role_dom((role_datum_t*)$4); if ($$ == 0) return -1;}
;
roleattribute_def : ROLEATTRIBUTE identifier id_comma_list ';'
{if (define_roleattribute()) return -1;}
;
opt_constraints : constraints
|
;
constraints : constraint_decl
| constraints constraint_decl
;
constraint_decl : constraint_def
| validatetrans_def
;
constraint_def : CONSTRAIN names names cexpr ';'
{ if (define_constraint((constraint_expr_t*)$4)) return -1; }
;
validatetrans_def : VALIDATETRANS names cexpr ';'
{ if (define_validatetrans((constraint_expr_t*)$3)) return -1; }
;
cexpr : '(' cexpr ')'
{ $$ = $2; }
| NOT cexpr
{ $$ = define_cexpr(CEXPR_NOT, $2, 0);
if ($$ == 0) return -1; }
| cexpr AND cexpr
{ $$ = define_cexpr(CEXPR_AND, $1, $3);
if ($$ == 0) return -1; }
| cexpr OR cexpr
{ $$ = define_cexpr(CEXPR_OR, $1, $3);
if ($$ == 0) return -1; }
| cexpr_prim
{ $$ = $1; }
;
cexpr_prim : U1 op U2
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_USER, $2);
if ($$ == 0) return -1; }
| R1 role_mls_op R2
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_ROLE, $2);
if ($$ == 0) return -1; }
| T1 op T2
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_TYPE, $2);
if ($$ == 0) return -1; }
| U1 op { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, CEXPR_USER, $2);
if ($$ == 0) return -1; }
| U2 op { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, (CEXPR_USER | CEXPR_TARGET), $2);
if ($$ == 0) return -1; }
| U3 op { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, (CEXPR_USER | CEXPR_XTARGET), $2);
if ($$ == 0) return -1; }
| R1 op { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, CEXPR_ROLE, $2);
if ($$ == 0) return -1; }
| R2 op { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, (CEXPR_ROLE | CEXPR_TARGET), $2);
if ($$ == 0) return -1; }
| R3 op { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, (CEXPR_ROLE | CEXPR_XTARGET), $2);
if ($$ == 0) return -1; }
| T1 op { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, CEXPR_TYPE, $2);
if ($$ == 0) return -1; }
| T2 op { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, (CEXPR_TYPE | CEXPR_TARGET), $2);
if ($$ == 0) return -1; }
| T3 op { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, (CEXPR_TYPE | CEXPR_XTARGET), $2);
if ($$ == 0) return -1; }
| SAMEUSER
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_USER, CEXPR_EQ);
if ($$ == 0) return -1; }
| SOURCE ROLE { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, CEXPR_ROLE, CEXPR_EQ);
if ($$ == 0) return -1; }
| TARGET ROLE { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, (CEXPR_ROLE | CEXPR_TARGET), CEXPR_EQ);
if ($$ == 0) return -1; }
| ROLE role_mls_op
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_ROLE, $2);
if ($$ == 0) return -1; }
| SOURCE TYPE { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, CEXPR_TYPE, CEXPR_EQ);
if ($$ == 0) return -1; }
| TARGET TYPE { if (insert_separator(1)) return -1; } names_push
{ $$ = define_cexpr(CEXPR_NAMES, (CEXPR_TYPE | CEXPR_TARGET), CEXPR_EQ);
if ($$ == 0) return -1; }
| L1 role_mls_op L2
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_L1L2, $2);
if ($$ == 0) return -1; }
| L1 role_mls_op H2
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_L1H2, $2);
if ($$ == 0) return -1; }
| H1 role_mls_op L2
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_H1L2, $2);
if ($$ == 0) return -1; }
| H1 role_mls_op H2
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_H1H2, $2);
if ($$ == 0) return -1; }
| L1 role_mls_op H1
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_L1H1, $2);
if ($$ == 0) return -1; }
| L2 role_mls_op H2
{ $$ = define_cexpr(CEXPR_ATTR, CEXPR_L2H2, $2);
if ($$ == 0) return -1; }
;
op : EQUALS
{ $$ = CEXPR_EQ; }
| NOTEQUAL
{ $$ = CEXPR_NEQ; }
;
role_mls_op : op
{ $$ = $1; }
| DOM
{ $$ = CEXPR_DOM; }
| DOMBY
{ $$ = CEXPR_DOMBY; }
| INCOMP
{ $$ = CEXPR_INCOMP; }
;
users : user_def
| users user_def
;
user_def : USER identifier ROLES names opt_mls_user ';'
{if (define_user()) return -1;}
;
opt_mls_user : LEVEL mls_level_def RANGE mls_range_def
|
;
initial_sid_contexts : initial_sid_context_def
| initial_sid_contexts initial_sid_context_def
;
initial_sid_context_def : SID identifier security_context_def
{if (define_initial_sid_context()) return -1;}
;
opt_dev_contexts : dev_contexts |
;
dev_contexts : dev_context_def
| dev_contexts dev_context_def
;
dev_context_def : pirq_context_def |
iomem_context_def |
ioport_context_def |
pci_context_def |
dtree_context_def
;
pirq_context_def : PIRQCON number security_context_def
{if (define_pirq_context($2)) return -1;}
;
iomem_context_def : IOMEMCON number64 security_context_def
{if (define_iomem_context($2,$2)) return -1;}
| IOMEMCON number64 '-' number64 security_context_def
{if (define_iomem_context($2,$4)) return -1;}
;
ioport_context_def : IOPORTCON number security_context_def
{if (define_ioport_context($2,$2)) return -1;}
| IOPORTCON number '-' number security_context_def
{if (define_ioport_context($2,$4)) return -1;}
;
pci_context_def : PCIDEVICECON number security_context_def
{if (define_pcidevice_context($2)) return -1;}
;
dtree_context_def : DEVICETREECON path security_context_def
{if (define_devicetree_context()) return -1;}
;
opt_fs_contexts : fs_contexts
|
;
fs_contexts : fs_context_def
| fs_contexts fs_context_def
;
fs_context_def : FSCON number number security_context_def security_context_def
{if (define_fs_context($2,$3)) return -1;}
;
net_contexts : opt_port_contexts opt_netif_contexts opt_node_contexts
;
opt_port_contexts : port_contexts
|
;
port_contexts : port_context_def
| port_contexts port_context_def
;
port_context_def : PORTCON identifier number security_context_def
{if (define_port_context($3,$3)) return -1;}
| PORTCON identifier number '-' number security_context_def
{if (define_port_context($3,$5)) return -1;}
;
opt_ibpkey_contexts : ibpkey_contexts
|
;
ibpkey_contexts : ibpkey_context_def
| ibpkey_contexts ibpkey_context_def
;
ibpkey_context_def : IBPKEYCON ipv6_addr number security_context_def
{if (define_ibpkey_context($3,$3)) return -1;}
| IBPKEYCON ipv6_addr number '-' number security_context_def
{if (define_ibpkey_context($3,$5)) return -1;}
;
opt_ibendport_contexts : ibendport_contexts
|
;
ibendport_contexts : ibendport_context_def
| ibendport_contexts ibendport_context_def
;
ibendport_context_def : IBENDPORTCON identifier number security_context_def
{if (define_ibendport_context($3)) return -1;}
;
opt_netif_contexts : netif_contexts
|
;
netif_contexts : netif_context_def
| netif_contexts netif_context_def
;
netif_context_def : NETIFCON identifier security_context_def security_context_def
{if (define_netif_context()) return -1;}
;
opt_node_contexts : node_contexts
|
;
node_contexts : node_context_def
| node_contexts node_context_def
;
node_context_def : NODECON ipv4_addr_def ipv4_addr_def security_context_def
{if (define_ipv4_node_context()) return -1;}
| NODECON ipv6_addr ipv6_addr security_context_def
{if (define_ipv6_node_context()) return -1;}
;
opt_fs_uses : fs_uses
|
;
fs_uses : fs_use_def
| fs_uses fs_use_def
;
fs_use_def : FSUSEXATTR filesystem security_context_def ';'
{if (define_fs_use(SECURITY_FS_USE_XATTR)) return -1;}
| FSUSETASK identifier security_context_def ';'
{if (define_fs_use(SECURITY_FS_USE_TASK)) return -1;}
| FSUSETRANS identifier security_context_def ';'
{if (define_fs_use(SECURITY_FS_USE_TRANS)) return -1;}
;
opt_genfs_contexts : genfs_contexts
|
;
genfs_contexts : genfs_context_def
| genfs_contexts genfs_context_def
;
genfs_context_def : GENFSCON filesystem path '-' identifier security_context_def
{if (define_genfs_context(1)) return -1;}
| GENFSCON filesystem path '-' '-' {insert_id("-", 0);} security_context_def
{if (define_genfs_context(1)) return -1;}
| GENFSCON filesystem path security_context_def
{if (define_genfs_context(0)) return -1;}
;
ipv4_addr_def : IPV4_ADDR
{ if (insert_id(yytext,0)) return -1; }
;
xperms : xperm
{ if (insert_separator(0)) return -1; }
| nested_xperm_set
{ if (insert_separator(0)) return -1; }
| tilde xperm
{ if (insert_id("~", 0)) return -1; }
| tilde nested_xperm_set
{ if (insert_id("~", 0)) return -1;
if (insert_separator(0)) return -1; }
;
nested_xperm_set : '{' nested_xperm_list '}'
;
nested_xperm_list : nested_xperm_element
| nested_xperm_list nested_xperm_element
;
nested_xperm_element: xperm '-' { if (insert_id("-", 0)) return -1; } xperm
| xperm
| nested_xperm_set
;
xperm : number
{ if (insert_id(yytext,0)) return -1; }
;
security_context_def : identifier ':' identifier ':' identifier opt_mls_range_def
;
opt_mls_range_def : ':' mls_range_def
|
;
mls_range_def : mls_level_def '-' mls_level_def
{if (insert_separator(0)) return -1;}
| mls_level_def
{if (insert_separator(0)) return -1;}
;
mls_level_def : identifier ':' id_comma_list
{if (insert_separator(0)) return -1;}
| identifier
{if (insert_separator(0)) return -1;}
;
id_comma_list : identifier
| id_comma_list ',' identifier
;
tilde : '~'
;
asterisk : '*'
;
names : identifier
{ if (insert_separator(0)) return -1; }
| nested_id_set
{ if (insert_separator(0)) return -1; }
| asterisk
{ if (insert_id("*", 0)) return -1;
if (insert_separator(0)) return -1; }
| tilde identifier
{ if (insert_id("~", 0)) return -1;
if (insert_separator(0)) return -1; }
| tilde nested_id_set
{ if (insert_id("~", 0)) return -1;
if (insert_separator(0)) return -1; }
| identifier '-' { if (insert_id("-", 0)) return -1; } identifier
{ if (insert_separator(0)) return -1; }
;
tilde_push : tilde
{ if (insert_id("~", 1)) return -1; }
;
asterisk_push : asterisk
{ if (insert_id("*", 1)) return -1; }
;
names_push : identifier_push
| '{' identifier_list_push '}'
| asterisk_push
| tilde_push identifier_push
| tilde_push '{' identifier_list_push '}'
;
identifier_list_push : identifier_push
| identifier_list_push identifier_push
;
identifier_push : IDENTIFIER
{ if (insert_id(yytext, 1)) return -1; }
;
identifier_list : identifier
| identifier_list identifier
;
nested_id_set : '{' nested_id_list '}'
;
nested_id_list : nested_id_element | nested_id_list nested_id_element
;
nested_id_element : identifier | '-' { if (insert_id("-", 0)) return -1; } identifier | nested_id_set
;
identifier : IDENTIFIER
{ if (insert_id(yytext,0)) return -1; }
;
filesystem : FILESYSTEM
{ if (insert_id(yytext,0)) return -1; }
| IDENTIFIER
{ if (insert_id(yytext,0)) return -1; }
;
path : PATH
{ if (insert_id(yytext,0)) return -1; }
| QPATH
{ yytext[strlen(yytext) - 1] = '\0'; if (insert_id(yytext + 1,0)) return -1; }
;
filename : FILENAME
{ yytext[strlen(yytext) - 1] = '\0'; if (insert_id(yytext + 1,0)) return -1; }
;
number : NUMBER
{ $$ = strtoul(yytext,NULL,0); }
;
number64 : NUMBER
{ $$ = strtoull(yytext,NULL,0); }
;
ipv6_addr : IPV6_ADDR
{ if (insert_id(yytext,0)) return -1; }
;
policycap_def : POLICYCAP identifier ';'
{if (define_polcap()) return -1;}
;
permissive_def : PERMISSIVE identifier ';'
{if (define_permissive()) return -1;}
/*********** module grammar below ***********/
module_policy : module_def avrules_block
{ if (end_avrule_block(pass) == -1) return -1;
if (policydb_index_others(NULL, policydbp, 0)) return -1;
}
;
module_def : MODULE identifier version_identifier ';'
{ if (define_policy(pass, 1) == -1) return -1; }
;
version_identifier : VERSION_IDENTIFIER
{ if (insert_id(yytext,0)) return -1; }
| number
{ if (insert_id(yytext,0)) return -1; }
| ipv4_addr_def /* version can look like ipv4 address */
;
avrules_block : avrule_decls avrule_user_defs
;
avrule_decls : avrule_decls avrule_decl
| avrule_decl
;
avrule_decl : rbac_decl
| te_decl
| cond_stmt_def
| require_block
| optional_block
| ';'
;
require_block : REQUIRE '{' require_list '}'
;
require_list : require_list require_decl
| require_decl
;
require_decl : require_class ';'
| require_decl_def require_id_list ';'
;
require_class : CLASS identifier names
{ if (require_class(pass)) return -1; }
;
require_decl_def : ROLE { $$ = require_role; }
| TYPE { $$ = require_type; }
| ATTRIBUTE { $$ = require_attribute; }
| ATTRIBUTE_ROLE { $$ = require_attribute_role; }
| USER { $$ = require_user; }
| BOOL { $$ = require_bool; }
| TUNABLE { $$ = require_tunable; }
| SENSITIVITY { $$ = require_sens; }
| CATEGORY { $$ = require_cat; }
;
require_id_list : identifier
{ if ($<require_func>0 (pass)) return -1; }
| require_id_list ',' identifier
{ if ($<require_func>0 (pass)) return -1; }
;
optional_block : optional_decl '{' avrules_block '}'
{ if (end_avrule_block(pass) == -1) return -1; }
optional_else
{ if (end_optional(pass) == -1) return -1; }
;
optional_else : else_decl '{' avrules_block '}'
{ if (end_avrule_block(pass) == -1) return -1; }
| /* empty */
;
optional_decl : OPTIONAL
{ if (begin_optional(pass) == -1) return -1; }
;
else_decl : ELSE
{ if (begin_optional_else(pass) == -1) return -1; }
;
avrule_user_defs : user_def avrule_user_defs
| /* empty */
;
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