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selinux/checkpolicy/policy_parse.y
Jeff Vander Stoep 99fc177b5a Add neverallow support for ioctl extended permissions 
Neverallow rules for ioctl extended permissions will pass in two
cases:
1. If extended permissions exist for the source-target-class set
   the test will pass if the neverallow values are excluded.
2. If extended permissions do not exist for the source-target-class
   set the test will pass if the ioctl permission is not granted.

Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Acked-by:  Nick Kralevich <nnk@google.com>
Acked-by:  Stephen Smalley <sds@tycho.nsa.gov>
2015-09-22 10:52:47 -04:00

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/*
* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
*/
/*
* 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.
* 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 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 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
%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
;
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; }
;
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
| 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;}
;
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_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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