1 2/* 3 * Author : Stephen Smalley, <sds@epoch.ncsc.mil> 4 */ 5 6/* 7 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> 8 * 9 * Support for enhanced MLS infrastructure. 10 * 11 * Updated: David Caplan, <dac@tresys.com> 12 * 13 * Added conditional policy language extensions 14 * 15 * Updated: Joshua Brindle <jbrindle@tresys.com> 16 * Karl MacMillan <kmacmillan@mentalrootkit.com> 17 * Jason Tang <jtang@tresys.com> 18 * 19 * Added support for binary policy modules 20 * 21 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc. 22 * Copyright (C) 2003 - 2008 Tresys Technology, LLC 23 * Copyright (C) 2007 Red Hat Inc. 24 * This program is free software; you can redistribute it and/or modify 25 * it under the terms of the GNU General Public License as published by 26 * the Free Software Foundation, version 2. 27 */ 28 29/* FLASK */ 30 31%{ 32#include <sys/types.h> 33#include <assert.h> 34#include <stdarg.h> 35#include <stdint.h> 36#include <stdio.h> 37#include <stdlib.h> 38#include <string.h> 39#include <sys/socket.h> 40#include <netinet/in.h> 41#include <arpa/inet.h> 42#include <stdlib.h> 43 44#include <sepol/policydb/expand.h> 45#include <sepol/policydb/policydb.h> 46#include <sepol/policydb/services.h> 47#include <sepol/policydb/conditional.h> 48#include <sepol/policydb/flask.h> 49#include <sepol/policydb/hierarchy.h> 50#include <sepol/policydb/polcaps.h> 51#include "queue.h" 52#include "checkpolicy.h" 53#include "module_compiler.h" 54#include "policy_define.h" 55 56extern policydb_t *policydbp; 57extern unsigned int pass; 58 59extern char yytext[]; 60extern int yylex(void); 61extern int yywarn(char *msg); 62extern int yyerror(char *msg); 63 64typedef int (* require_func_t)(); 65 66%} 67 68%union { 69 unsigned int val; 70 uintptr_t valptr; 71 void *ptr; 72 require_func_t require_func; 73} 74 75%type <ptr> cond_expr cond_expr_prim cond_pol_list cond_else 76%type <ptr> cond_allow_def cond_auditallow_def cond_auditdeny_def cond_dontaudit_def 77%type <ptr> cond_transition_def cond_te_avtab_def cond_rule_def 78%type <ptr> role_def roles 79%type <valptr> cexpr cexpr_prim op role_mls_op 80%type <val> ipv4_addr_def number 81%type <require_func> require_decl_def 82 83%token PATH 84%token FILENAME 85%token CLONE 86%token COMMON 87%token CLASS 88%token CONSTRAIN 89%token VALIDATETRANS 90%token INHERITS 91%token SID 92%token ROLE 93%token ROLEATTRIBUTE 94%token ATTRIBUTE_ROLE 95%token ROLES 96%token TYPEALIAS 97%token TYPEATTRIBUTE 98%token TYPEBOUNDS 99%token TYPE 100%token TYPES 101%token ALIAS 102%token ATTRIBUTE 103%token BOOL 104%token TUNABLE 105%token IF 106%token ELSE 107%token TYPE_TRANSITION 108%token TYPE_MEMBER 109%token TYPE_CHANGE 110%token ROLE_TRANSITION 111%token RANGE_TRANSITION 112%token SENSITIVITY 113%token DOMINANCE 114%token DOM DOMBY INCOMP 115%token CATEGORY 116%token LEVEL 117%token RANGE 118%token MLSCONSTRAIN 119%token MLSVALIDATETRANS 120%token USER 121%token NEVERALLOW 122%token ALLOW 123%token AUDITALLOW 124%token AUDITDENY 125%token DONTAUDIT 126%token SOURCE 127%token TARGET 128%token SAMEUSER 129%token FSCON PORTCON NETIFCON NODECON 130%token PIRQCON IOMEMCON IOPORTCON PCIDEVICECON 131%token FSUSEXATTR FSUSETASK FSUSETRANS 132%token GENFSCON 133%token U1 U2 U3 R1 R2 R3 T1 T2 T3 L1 L2 H1 H2 134%token NOT AND OR XOR 135%token CTRUE CFALSE 136%token IDENTIFIER 137%token NUMBER 138%token EQUALS 139%token NOTEQUAL 140%token IPV4_ADDR 141%token IPV6_ADDR 142%token MODULE VERSION_IDENTIFIER REQUIRE OPTIONAL 143%token POLICYCAP 144%token PERMISSIVE 145%token FILESYSTEM 146 147%left OR 148%left XOR 149%left AND 150%right NOT 151%left EQUALS NOTEQUAL 152%% 153policy : base_policy 154 | module_policy 155 ; 156base_policy : { if (define_policy(pass, 0) == -1) return -1; } 157 classes initial_sids access_vectors 158 { if (pass == 1) { if (policydb_index_classes(policydbp)) return -1; } 159 else if (pass == 2) { if (policydb_index_others(NULL, policydbp, 0)) return -1; }} 160 opt_mls te_rbac users opt_constraints 161 { if (pass == 1) { if (policydb_index_bools(policydbp)) return -1;} 162 else if (pass == 2) { if (policydb_index_others(NULL, policydbp, 0)) return -1;}} 163 initial_sid_contexts opt_fs_contexts opt_fs_uses opt_genfs_contexts net_contexts opt_dev_contexts 164 ; 165classes : class_def 166 | classes class_def 167 ; 168class_def : CLASS identifier 169 {if (define_class()) return -1;} 170 ; 171initial_sids : initial_sid_def 172 | initial_sids initial_sid_def 173 ; 174initial_sid_def : SID identifier 175 {if (define_initial_sid()) return -1;} 176 ; 177access_vectors : opt_common_perms av_perms 178 ; 179opt_common_perms : common_perms 180 | 181 ; 182common_perms : common_perms_def 183 | common_perms common_perms_def 184 ; 185common_perms_def : COMMON identifier '{' identifier_list '}' 186 {if (define_common_perms()) return -1;} 187 ; 188av_perms : av_perms_def 189 | av_perms av_perms_def 190 ; 191av_perms_def : CLASS identifier '{' identifier_list '}' 192 {if (define_av_perms(FALSE)) return -1;} 193 | CLASS identifier INHERITS identifier 194 {if (define_av_perms(TRUE)) return -1;} 195 | CLASS identifier INHERITS identifier '{' identifier_list '}' 196 {if (define_av_perms(TRUE)) return -1;} 197 ; 198opt_mls : mls 199 | 200 ; 201mls : sensitivities dominance opt_categories levels mlspolicy 202 ; 203sensitivities : sensitivity_def 204 | sensitivities sensitivity_def 205 ; 206sensitivity_def : SENSITIVITY identifier alias_def ';' 207 {if (define_sens()) return -1;} 208 | SENSITIVITY identifier ';' 209 {if (define_sens()) return -1;} 210 ; 211alias_def : ALIAS names 212 ; 213dominance : DOMINANCE identifier 214 {if (define_dominance()) return -1;} 215 | DOMINANCE '{' identifier_list '}' 216 {if (define_dominance()) return -1;} 217 ; 218opt_categories : categories 219 | 220 ; 221categories : category_def 222 | categories category_def 223 ; 224category_def : CATEGORY identifier alias_def ';' 225 {if (define_category()) return -1;} 226 | CATEGORY identifier ';' 227 {if (define_category()) return -1;} 228 ; 229levels : level_def 230 | levels level_def 231 ; 232level_def : LEVEL identifier ':' id_comma_list ';' 233 {if (define_level()) return -1;} 234 | LEVEL identifier ';' 235 {if (define_level()) return -1;} 236 ; 237mlspolicy : mlspolicy_decl 238 | mlspolicy mlspolicy_decl 239 ; 240mlspolicy_decl : mlsconstraint_def 241 | mlsvalidatetrans_def 242 ; 243mlsconstraint_def : MLSCONSTRAIN names names cexpr ';' 244 { if (define_constraint((constraint_expr_t*)$4)) return -1; } 245 ; 246mlsvalidatetrans_def : MLSVALIDATETRANS names cexpr ';' 247 { if (define_validatetrans((constraint_expr_t*)$3)) return -1; } 248 ; 249te_rbac : te_rbac_decl 250 | te_rbac te_rbac_decl 251 ; 252te_rbac_decl : te_decl 253 | rbac_decl 254 | cond_stmt_def 255 | optional_block 256 | policycap_def 257 | ';' 258 ; 259rbac_decl : attribute_role_def 260 | role_type_def 261 | role_dominance 262 | role_trans_def 263 | role_allow_def 264 | roleattribute_def 265 | role_attr_def 266 ; 267te_decl : attribute_def 268 | type_def 269 | typealias_def 270 | typeattribute_def 271 | typebounds_def 272 | bool_def 273 | tunable_def 274 | transition_def 275 | range_trans_def 276 | te_avtab_def 277 | permissive_def 278 ; 279attribute_def : ATTRIBUTE identifier ';' 280 { if (define_attrib()) return -1;} 281 ; 282type_def : TYPE identifier alias_def opt_attr_list ';' 283 {if (define_type(1)) return -1;} 284 | TYPE identifier opt_attr_list ';' 285 {if (define_type(0)) return -1;} 286 ; 287typealias_def : TYPEALIAS identifier alias_def ';' 288 {if (define_typealias()) return -1;} 289 ; 290typeattribute_def : TYPEATTRIBUTE identifier id_comma_list ';' 291 {if (define_typeattribute()) return -1;} 292 ; 293typebounds_def : TYPEBOUNDS identifier id_comma_list ';' 294 {if (define_typebounds()) return -1;} 295 ; 296opt_attr_list : ',' id_comma_list 297 | 298 ; 299bool_def : BOOL identifier bool_val ';' 300 { if (define_bool_tunable(0)) return -1; } 301 ; 302tunable_def : TUNABLE identifier bool_val ';' 303 { if (define_bool_tunable(1)) return -1; } 304 ; 305bool_val : CTRUE 306 { if (insert_id("T",0)) return -1; } 307 | CFALSE 308 { if (insert_id("F",0)) return -1; } 309 ; 310cond_stmt_def : IF cond_expr '{' cond_pol_list '}' cond_else 311 { if (pass == 2) { if (define_conditional((cond_expr_t*)$2, (avrule_t*)$4, (avrule_t*)$6) < 0) return -1; }} 312 ; 313cond_else : ELSE '{' cond_pol_list '}' 314 { $$ = $3; } 315 | /* empty */ 316 { $$ = NULL; } 317cond_expr : '(' cond_expr ')' 318 { $$ = $2;} 319 | NOT cond_expr 320 { $$ = define_cond_expr(COND_NOT, $2, 0); 321 if ($$ == 0) return -1; } 322 | cond_expr AND cond_expr 323 { $$ = define_cond_expr(COND_AND, $1, $3); 324 if ($$ == 0) return -1; } 325 | cond_expr OR cond_expr 326 { $$ = define_cond_expr(COND_OR, $1, $3); 327 if ($$ == 0) return -1; } 328 | cond_expr XOR cond_expr 329 { $$ = define_cond_expr(COND_XOR, $1, $3); 330 if ($$ == 0) return -1; } 331 | cond_expr EQUALS cond_expr 332 { $$ = define_cond_expr(COND_EQ, $1, $3); 333 if ($$ == 0) return -1; } 334 | cond_expr NOTEQUAL cond_expr 335 { $$ = define_cond_expr(COND_NEQ, $1, $3); 336 if ($$ == 0) return -1; } 337 | cond_expr_prim 338 { $$ = $1; } 339 ; 340cond_expr_prim : identifier 341 { $$ = define_cond_expr(COND_BOOL,0, 0); 342 if ($$ == COND_ERR) return -1; } 343 ; 344cond_pol_list : cond_pol_list cond_rule_def 345 { $$ = define_cond_pol_list((avrule_t *)$1, (avrule_t *)$2); } 346 | /* empty */ 347 { $$ = NULL; } 348 ; 349cond_rule_def : cond_transition_def 350 { $$ = $1; } 351 | cond_te_avtab_def 352 { $$ = $1; } 353 | require_block 354 { $$ = NULL; } 355 ; 356cond_transition_def : TYPE_TRANSITION names names ':' names identifier filename ';' 357 { $$ = define_cond_filename_trans() ; 358 if ($$ == COND_ERR) return -1;} 359 | TYPE_TRANSITION names names ':' names identifier ';' 360 { $$ = define_cond_compute_type(AVRULE_TRANSITION) ; 361 if ($$ == COND_ERR) return -1;} 362 | TYPE_MEMBER names names ':' names identifier ';' 363 { $$ = define_cond_compute_type(AVRULE_MEMBER) ; 364 if ($$ == COND_ERR) return -1;} 365 | TYPE_CHANGE names names ':' names identifier ';' 366 { $$ = define_cond_compute_type(AVRULE_CHANGE) ; 367 if ($$ == COND_ERR) return -1;} 368 ; 369cond_te_avtab_def : cond_allow_def 370 { $$ = $1; } 371 | cond_auditallow_def 372 { $$ = $1; } 373 | cond_auditdeny_def 374 { $$ = $1; } 375 | cond_dontaudit_def 376 { $$ = $1; } 377 ; 378cond_allow_def : ALLOW names names ':' names names ';' 379 { $$ = define_cond_te_avtab(AVRULE_ALLOWED) ; 380 if ($$ == COND_ERR) return -1; } 381 ; 382cond_auditallow_def : AUDITALLOW names names ':' names names ';' 383 { $$ = define_cond_te_avtab(AVRULE_AUDITALLOW) ; 384 if ($$ == COND_ERR) return -1; } 385 ; 386cond_auditdeny_def : AUDITDENY names names ':' names names ';' 387 { $$ = define_cond_te_avtab(AVRULE_AUDITDENY) ; 388 if ($$ == COND_ERR) return -1; } 389 ; 390cond_dontaudit_def : DONTAUDIT names names ':' names names ';' 391 { $$ = define_cond_te_avtab(AVRULE_DONTAUDIT); 392 if ($$ == COND_ERR) return -1; } 393 ; 394 ; 395transition_def : TYPE_TRANSITION names names ':' names identifier filename ';' 396 {if (define_filename_trans()) return -1; } 397 | TYPE_TRANSITION names names ':' names identifier ';' 398 {if (define_compute_type(AVRULE_TRANSITION)) return -1;} 399 | TYPE_MEMBER names names ':' names identifier ';' 400 {if (define_compute_type(AVRULE_MEMBER)) return -1;} 401 | TYPE_CHANGE names names ':' names identifier ';' 402 {if (define_compute_type(AVRULE_CHANGE)) return -1;} 403 ; 404range_trans_def : RANGE_TRANSITION names names mls_range_def ';' 405 { if (define_range_trans(0)) return -1; } 406 | RANGE_TRANSITION names names ':' names mls_range_def ';' 407 { if (define_range_trans(1)) return -1; } 408 ; 409te_avtab_def : allow_def 410 | auditallow_def 411 | auditdeny_def 412 | dontaudit_def 413 | neverallow_def 414 ; 415allow_def : ALLOW names names ':' names names ';' 416 {if (define_te_avtab(AVRULE_ALLOWED)) return -1; } 417 ; 418auditallow_def : AUDITALLOW names names ':' names names ';' 419 {if (define_te_avtab(AVRULE_AUDITALLOW)) return -1; } 420 ; 421auditdeny_def : AUDITDENY names names ':' names names ';' 422 {if (define_te_avtab(AVRULE_AUDITDENY)) return -1; } 423 ; 424dontaudit_def : DONTAUDIT names names ':' names names ';' 425 {if (define_te_avtab(AVRULE_DONTAUDIT)) return -1; } 426 ; 427neverallow_def : NEVERALLOW names names ':' names names ';' 428 {if (define_te_avtab(AVRULE_NEVERALLOW)) return -1; } 429 ; 430attribute_role_def : ATTRIBUTE_ROLE identifier ';' 431 {if (define_attrib_role()) return -1; } 432 ; 433role_type_def : ROLE identifier TYPES names ';' 434 {if (define_role_types()) return -1;} 435 ; 436role_attr_def : ROLE identifier opt_attr_list ';' 437 {if (define_role_attr()) return -1;} 438 ; 439role_dominance : DOMINANCE '{' roles '}' 440 ; 441role_trans_def : ROLE_TRANSITION names names identifier ';' 442 {if (define_role_trans(0)) return -1; } 443 | ROLE_TRANSITION names names ':' names identifier ';' 444 {if (define_role_trans(1)) return -1;} 445 ; 446role_allow_def : ALLOW names names ';' 447 {if (define_role_allow()) return -1; } 448 ; 449roles : role_def 450 { $$ = $1; } 451 | roles role_def 452 { $$ = merge_roles_dom((role_datum_t*)$1, (role_datum_t*)$2); if ($$ == 0) return -1;} 453 ; 454role_def : ROLE identifier_push ';' 455 {$$ = define_role_dom(NULL); if ($$ == 0) return -1;} 456 | ROLE identifier_push '{' roles '}' 457 {$$ = define_role_dom((role_datum_t*)$4); if ($$ == 0) return -1;} 458 ; 459roleattribute_def : ROLEATTRIBUTE identifier id_comma_list ';' 460 {if (define_roleattribute()) return -1;} 461 ; 462opt_constraints : constraints 463 | 464 ; 465constraints : constraint_decl 466 | constraints constraint_decl 467 ; 468constraint_decl : constraint_def 469 | validatetrans_def 470 ; 471constraint_def : CONSTRAIN names names cexpr ';' 472 { if (define_constraint((constraint_expr_t*)$4)) return -1; } 473 ; 474validatetrans_def : VALIDATETRANS names cexpr ';' 475 { if (define_validatetrans((constraint_expr_t*)$3)) return -1; } 476 ; 477cexpr : '(' cexpr ')' 478 { $$ = $2; } 479 | NOT cexpr 480 { $$ = define_cexpr(CEXPR_NOT, $2, 0); 481 if ($$ == 0) return -1; } 482 | cexpr AND cexpr 483 { $$ = define_cexpr(CEXPR_AND, $1, $3); 484 if ($$ == 0) return -1; } 485 | cexpr OR cexpr 486 { $$ = define_cexpr(CEXPR_OR, $1, $3); 487 if ($$ == 0) return -1; } 488 | cexpr_prim 489 { $$ = $1; } 490 ; 491cexpr_prim : U1 op U2 492 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_USER, $2); 493 if ($$ == 0) return -1; } 494 | R1 role_mls_op R2 495 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_ROLE, $2); 496 if ($$ == 0) return -1; } 497 | T1 op T2 498 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_TYPE, $2); 499 if ($$ == 0) return -1; } 500 | U1 op { if (insert_separator(1)) return -1; } names_push 501 { $$ = define_cexpr(CEXPR_NAMES, CEXPR_USER, $2); 502 if ($$ == 0) return -1; } 503 | U2 op { if (insert_separator(1)) return -1; } names_push 504 { $$ = define_cexpr(CEXPR_NAMES, (CEXPR_USER | CEXPR_TARGET), $2); 505 if ($$ == 0) return -1; } 506 | U3 op { if (insert_separator(1)) return -1; } names_push 507 { $$ = define_cexpr(CEXPR_NAMES, (CEXPR_USER | CEXPR_XTARGET), $2); 508 if ($$ == 0) return -1; } 509 | R1 op { if (insert_separator(1)) return -1; } names_push 510 { $$ = define_cexpr(CEXPR_NAMES, CEXPR_ROLE, $2); 511 if ($$ == 0) return -1; } 512 | R2 op { if (insert_separator(1)) return -1; } names_push 513 { $$ = define_cexpr(CEXPR_NAMES, (CEXPR_ROLE | CEXPR_TARGET), $2); 514 if ($$ == 0) return -1; } 515 | R3 op { if (insert_separator(1)) return -1; } names_push 516 { $$ = define_cexpr(CEXPR_NAMES, (CEXPR_ROLE | CEXPR_XTARGET), $2); 517 if ($$ == 0) return -1; } 518 | T1 op { if (insert_separator(1)) return -1; } names_push 519 { $$ = define_cexpr(CEXPR_NAMES, CEXPR_TYPE, $2); 520 if ($$ == 0) return -1; } 521 | T2 op { if (insert_separator(1)) return -1; } names_push 522 { $$ = define_cexpr(CEXPR_NAMES, (CEXPR_TYPE | CEXPR_TARGET), $2); 523 if ($$ == 0) return -1; } 524 | T3 op { if (insert_separator(1)) return -1; } names_push 525 { $$ = define_cexpr(CEXPR_NAMES, (CEXPR_TYPE | CEXPR_XTARGET), $2); 526 if ($$ == 0) return -1; } 527 | SAMEUSER 528 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_USER, CEXPR_EQ); 529 if ($$ == 0) return -1; } 530 | SOURCE ROLE { if (insert_separator(1)) return -1; } names_push 531 { $$ = define_cexpr(CEXPR_NAMES, CEXPR_ROLE, CEXPR_EQ); 532 if ($$ == 0) return -1; } 533 | TARGET ROLE { if (insert_separator(1)) return -1; } names_push 534 { $$ = define_cexpr(CEXPR_NAMES, (CEXPR_ROLE | CEXPR_TARGET), CEXPR_EQ); 535 if ($$ == 0) return -1; } 536 | ROLE role_mls_op 537 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_ROLE, $2); 538 if ($$ == 0) return -1; } 539 | SOURCE TYPE { if (insert_separator(1)) return -1; } names_push 540 { $$ = define_cexpr(CEXPR_NAMES, CEXPR_TYPE, CEXPR_EQ); 541 if ($$ == 0) return -1; } 542 | TARGET TYPE { if (insert_separator(1)) return -1; } names_push 543 { $$ = define_cexpr(CEXPR_NAMES, (CEXPR_TYPE | CEXPR_TARGET), CEXPR_EQ); 544 if ($$ == 0) return -1; } 545 | L1 role_mls_op L2 546 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_L1L2, $2); 547 if ($$ == 0) return -1; } 548 | L1 role_mls_op H2 549 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_L1H2, $2); 550 if ($$ == 0) return -1; } 551 | H1 role_mls_op L2 552 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_H1L2, $2); 553 if ($$ == 0) return -1; } 554 | H1 role_mls_op H2 555 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_H1H2, $2); 556 if ($$ == 0) return -1; } 557 | L1 role_mls_op H1 558 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_L1H1, $2); 559 if ($$ == 0) return -1; } 560 | L2 role_mls_op H2 561 { $$ = define_cexpr(CEXPR_ATTR, CEXPR_L2H2, $2); 562 if ($$ == 0) return -1; } 563 ; 564op : EQUALS 565 { $$ = CEXPR_EQ; } 566 | NOTEQUAL 567 { $$ = CEXPR_NEQ; } 568 ; 569role_mls_op : op 570 { $$ = $1; } 571 | DOM 572 { $$ = CEXPR_DOM; } 573 | DOMBY 574 { $$ = CEXPR_DOMBY; } 575 | INCOMP 576 { $$ = CEXPR_INCOMP; } 577 ; 578users : user_def 579 | users user_def 580 ; 581user_def : USER identifier ROLES names opt_mls_user ';' 582 {if (define_user()) return -1;} 583 ; 584opt_mls_user : LEVEL mls_level_def RANGE mls_range_def 585 | 586 ; 587initial_sid_contexts : initial_sid_context_def 588 | initial_sid_contexts initial_sid_context_def 589 ; 590initial_sid_context_def : SID identifier security_context_def 591 {if (define_initial_sid_context()) return -1;} 592 ; 593opt_dev_contexts : dev_contexts | 594 ; 595dev_contexts : dev_context_def 596 | dev_contexts dev_context_def 597 ; 598dev_context_def : pirq_context_def | 599 iomem_context_def | 600 ioport_context_def | 601 pci_context_def 602 ; 603pirq_context_def : PIRQCON number security_context_def 604 {if (define_pirq_context($2)) return -1;} 605 ; 606iomem_context_def : IOMEMCON number security_context_def 607 {if (define_iomem_context($2,$2)) return -1;} 608 | IOMEMCON number '-' number security_context_def 609 {if (define_iomem_context($2,$4)) return -1;} 610 ; 611ioport_context_def : IOPORTCON number security_context_def 612 {if (define_ioport_context($2,$2)) return -1;} 613 | IOPORTCON number '-' number security_context_def 614 {if (define_ioport_context($2,$4)) return -1;} 615 ; 616pci_context_def : PCIDEVICECON number security_context_def 617 {if (define_pcidevice_context($2)) return -1;} 618 ; 619opt_fs_contexts : fs_contexts 620 | 621 ; 622fs_contexts : fs_context_def 623 | fs_contexts fs_context_def 624 ; 625fs_context_def : FSCON number number security_context_def security_context_def 626 {if (define_fs_context($2,$3)) return -1;} 627 ; 628net_contexts : opt_port_contexts opt_netif_contexts opt_node_contexts 629 ; 630opt_port_contexts : port_contexts 631 | 632 ; 633port_contexts : port_context_def 634 | port_contexts port_context_def 635 ; 636port_context_def : PORTCON identifier number security_context_def 637 {if (define_port_context($3,$3)) return -1;} 638 | PORTCON identifier number '-' number security_context_def 639 {if (define_port_context($3,$5)) return -1;} 640 ; 641opt_netif_contexts : netif_contexts 642 | 643 ; 644netif_contexts : netif_context_def 645 | netif_contexts netif_context_def 646 ; 647netif_context_def : NETIFCON identifier security_context_def security_context_def 648 {if (define_netif_context()) return -1;} 649 ; 650opt_node_contexts : node_contexts 651 | 652 ; 653node_contexts : node_context_def 654 | node_contexts node_context_def 655 ; 656node_context_def : NODECON ipv4_addr_def ipv4_addr_def security_context_def 657 {if (define_ipv4_node_context()) return -1;} 658 | NODECON ipv6_addr ipv6_addr security_context_def 659 {if (define_ipv6_node_context()) return -1;} 660 ; 661opt_fs_uses : fs_uses 662 | 663 ; 664fs_uses : fs_use_def 665 | fs_uses fs_use_def 666 ; 667fs_use_def : FSUSEXATTR filesystem security_context_def ';' 668 {if (define_fs_use(SECURITY_FS_USE_XATTR)) return -1;} 669 | FSUSETASK identifier security_context_def ';' 670 {if (define_fs_use(SECURITY_FS_USE_TASK)) return -1;} 671 | FSUSETRANS identifier security_context_def ';' 672 {if (define_fs_use(SECURITY_FS_USE_TRANS)) return -1;} 673 ; 674opt_genfs_contexts : genfs_contexts 675 | 676 ; 677genfs_contexts : genfs_context_def 678 | genfs_contexts genfs_context_def 679 ; 680genfs_context_def : GENFSCON filesystem path '-' identifier security_context_def 681 {if (define_genfs_context(1)) return -1;} 682 | GENFSCON filesystem path '-' '-' {insert_id("-", 0);} security_context_def 683 {if (define_genfs_context(1)) return -1;} 684 | GENFSCON filesystem path security_context_def 685 {if (define_genfs_context(0)) return -1;} 686 ; 687ipv4_addr_def : IPV4_ADDR 688 { if (insert_id(yytext,0)) return -1; } 689 ; 690security_context_def : identifier ':' identifier ':' identifier opt_mls_range_def 691 ; 692opt_mls_range_def : ':' mls_range_def 693 | 694 ; 695mls_range_def : mls_level_def '-' mls_level_def 696 {if (insert_separator(0)) return -1;} 697 | mls_level_def 698 {if (insert_separator(0)) return -1;} 699 ; 700mls_level_def : identifier ':' id_comma_list 701 {if (insert_separator(0)) return -1;} 702 | identifier 703 {if (insert_separator(0)) return -1;} 704 ; 705id_comma_list : identifier 706 | id_comma_list ',' identifier 707 ; 708tilde : '~' 709 ; 710asterisk : '*' 711 ; 712names : identifier 713 { if (insert_separator(0)) return -1; } 714 | nested_id_set 715 { if (insert_separator(0)) return -1; } 716 | asterisk 717 { if (insert_id("*", 0)) return -1; 718 if (insert_separator(0)) return -1; } 719 | tilde identifier 720 { if (insert_id("~", 0)) return -1; 721 if (insert_separator(0)) return -1; } 722 | tilde nested_id_set 723 { if (insert_id("~", 0)) return -1; 724 if (insert_separator(0)) return -1; } 725 | identifier '-' { if (insert_id("-", 0)) return -1; } identifier 726 { if (insert_separator(0)) return -1; } 727 ; 728tilde_push : tilde 729 { if (insert_id("~", 1)) return -1; } 730 ; 731asterisk_push : asterisk 732 { if (insert_id("*", 1)) return -1; } 733 ; 734names_push : identifier_push 735 | '{' identifier_list_push '}' 736 | asterisk_push 737 | tilde_push identifier_push 738 | tilde_push '{' identifier_list_push '}' 739 ; 740identifier_list_push : identifier_push 741 | identifier_list_push identifier_push 742 ; 743identifier_push : IDENTIFIER 744 { if (insert_id(yytext, 1)) return -1; } 745 ; 746identifier_list : identifier 747 | identifier_list identifier 748 ; 749nested_id_set : '{' nested_id_list '}' 750 ; 751nested_id_list : nested_id_element | nested_id_list nested_id_element 752 ; 753nested_id_element : identifier | '-' { if (insert_id("-", 0)) return -1; } identifier | nested_id_set 754 ; 755identifier : IDENTIFIER 756 { if (insert_id(yytext,0)) return -1; } 757 ; 758filesystem : FILESYSTEM 759 { if (insert_id(yytext,0)) return -1; } 760 | IDENTIFIER 761 { if (insert_id(yytext,0)) return -1; } 762 ; 763path : PATH 764 { if (insert_id(yytext,0)) return -1; } 765 ; 766filename : FILENAME 767 { yytext[strlen(yytext) - 1] = '\0'; if (insert_id(yytext + 1,0)) return -1; } 768 ; 769number : NUMBER 770 { $$ = strtoul(yytext,NULL,0); } 771 ; 772ipv6_addr : IPV6_ADDR 773 { if (insert_id(yytext,0)) return -1; } 774 ; 775policycap_def : POLICYCAP identifier ';' 776 {if (define_polcap()) return -1;} 777 ; 778permissive_def : PERMISSIVE identifier ';' 779 {if (define_permissive()) return -1;} 780 781/*********** module grammar below ***********/ 782 783module_policy : module_def avrules_block 784 { if (end_avrule_block(pass) == -1) return -1; 785 if (policydb_index_others(NULL, policydbp, 0)) return -1; 786 } 787 ; 788module_def : MODULE identifier version_identifier ';' 789 { if (define_policy(pass, 1) == -1) return -1; } 790 ; 791version_identifier : VERSION_IDENTIFIER 792 { if (insert_id(yytext,0)) return -1; } 793 | number 794 { if (insert_id(yytext,0)) return -1; } 795 | ipv4_addr_def /* version can look like ipv4 address */ 796 ; 797avrules_block : avrule_decls avrule_user_defs 798 ; 799avrule_decls : avrule_decls avrule_decl 800 | avrule_decl 801 ; 802avrule_decl : rbac_decl 803 | te_decl 804 | cond_stmt_def 805 | require_block 806 | optional_block 807 | ';' 808 ; 809require_block : REQUIRE '{' require_list '}' 810 ; 811require_list : require_list require_decl 812 | require_decl 813 ; 814require_decl : require_class ';' 815 | require_decl_def require_id_list ';' 816 ; 817require_class : CLASS identifier names 818 { if (require_class(pass)) return -1; } 819 ; 820require_decl_def : ROLE { $$ = require_role; } 821 | TYPE { $$ = require_type; } 822 | ATTRIBUTE { $$ = require_attribute; } 823 | ATTRIBUTE_ROLE { $$ = require_attribute_role; } 824 | USER { $$ = require_user; } 825 | BOOL { $$ = require_bool; } 826 | TUNABLE { $$ = require_tunable; } 827 | SENSITIVITY { $$ = require_sens; } 828 | CATEGORY { $$ = require_cat; } 829 ; 830require_id_list : identifier 831 { if ($<require_func>0 (pass)) return -1; } 832 | require_id_list ',' identifier 833 { if ($<require_func>0 (pass)) return -1; } 834 ; 835optional_block : optional_decl '{' avrules_block '}' 836 { if (end_avrule_block(pass) == -1) return -1; } 837 optional_else 838 { if (end_optional(pass) == -1) return -1; } 839 ; 840optional_else : else_decl '{' avrules_block '}' 841 { if (end_avrule_block(pass) == -1) return -1; } 842 | /* empty */ 843 ; 844optional_decl : OPTIONAL 845 { if (begin_optional(pass) == -1) return -1; } 846 ; 847else_decl : ELSE 848 { if (begin_optional_else(pass) == -1) return -1; } 849 ; 850avrule_user_defs : user_def avrule_user_defs 851 | /* empty */ 852 ; 853