1 /* Author : Stephen Smalley, <sds@epoch.ncsc.mil> */ 2 3 /* 4 * Updated: Joshua Brindle <jbrindle@tresys.com> 5 * Karl MacMillan <kmacmillan@tresys.com> 6 * Jason Tang <jtang@tresys.com> 7 * 8 * Module support 9 * 10 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> 11 * 12 * Support for enhanced MLS infrastructure. 13 * 14 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com> 15 * 16 * Added conditional policy language extensions 17 * 18 * Updated: Red Hat, Inc. James Morris <jmorris@redhat.com> 19 * 20 * Fine-grained netlink support 21 * IPv6 support 22 * Code cleanup 23 * 24 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc. 25 * Copyright (C) 2003 - 2004 Tresys Technology, LLC 26 * Copyright (C) 2003 - 2004 Red Hat, Inc. 27 * 28 * This library is free software; you can redistribute it and/or 29 * modify it under the terms of the GNU Lesser General Public 30 * License as published by the Free Software Foundation; either 31 * version 2.1 of the License, or (at your option) any later version. 32 * 33 * This library is distributed in the hope that it will be useful, 34 * but WITHOUT ANY WARRANTY; without even the implied warranty of 35 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 36 * Lesser General Public License for more details. 37 * 38 * You should have received a copy of the GNU Lesser General Public 39 * License along with this library; if not, write to the Free Software 40 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 41 */ 42 43 /* FLASK */ 44 45 /* 46 * A policy database (policydb) specifies the 47 * configuration data for the security policy. 48 */ 49 50 #ifndef _SEPOL_POLICYDB_POLICYDB_H_ 51 #define _SEPOL_POLICYDB_POLICYDB_H_ 52 53 #include <stdio.h> 54 #include <stddef.h> 55 56 #include <sepol/policydb.h> 57 58 #include <sepol/policydb/flask_types.h> 59 #include <sepol/policydb/symtab.h> 60 #include <sepol/policydb/avtab.h> 61 #include <sepol/policydb/context.h> 62 #include <sepol/policydb/constraint.h> 63 #include <sepol/policydb/sidtab.h> 64 #include <sys/cdefs.h> 65 66 #define ERRMSG_LEN 1024 67 68 #define POLICYDB_SUCCESS 0 69 #define POLICYDB_ERROR -1 70 #define POLICYDB_UNSUPPORTED -2 71 72 __BEGIN_DECLS 73 74 /* 75 * A datum type is defined for each kind of symbol 76 * in the configuration data: individual permissions, 77 * common prefixes for access vectors, classes, 78 * users, roles, types, sensitivities, categories, etc. 79 */ 80 81 /* type set preserves data needed by modules such as *, ~ and attributes */ 82 typedef struct type_set { 83 ebitmap_t types; 84 ebitmap_t negset; 85 #define TYPE_STAR 1 86 #define TYPE_COMP 2 87 uint32_t flags; 88 } type_set_t; 89 90 typedef struct role_set { 91 ebitmap_t roles; 92 #define ROLE_STAR 1 93 #define ROLE_COMP 2 94 uint32_t flags; 95 } role_set_t; 96 97 /* Permission attributes */ 98 typedef struct perm_datum { 99 symtab_datum_t s; 100 } perm_datum_t; 101 102 /* Attributes of a common prefix for access vectors */ 103 typedef struct common_datum { 104 symtab_datum_t s; 105 symtab_t permissions; /* common permissions */ 106 } common_datum_t; 107 108 /* Class attributes */ 109 typedef struct class_datum { 110 symtab_datum_t s; 111 char *comkey; /* common name */ 112 common_datum_t *comdatum; /* common datum */ 113 symtab_t permissions; /* class-specific permission symbol table */ 114 constraint_node_t *constraints; /* constraints on class permissions */ 115 constraint_node_t *validatetrans; /* special transition rules */ 116 /* Options how a new object user and role should be decided */ 117 #define DEFAULT_SOURCE 1 118 #define DEFAULT_TARGET 2 119 char default_user; 120 char default_role; 121 char default_type; 122 /* Options how a new object range should be decided */ 123 #define DEFAULT_SOURCE_LOW 1 124 #define DEFAULT_SOURCE_HIGH 2 125 #define DEFAULT_SOURCE_LOW_HIGH 3 126 #define DEFAULT_TARGET_LOW 4 127 #define DEFAULT_TARGET_HIGH 5 128 #define DEFAULT_TARGET_LOW_HIGH 6 129 char default_range; 130 } class_datum_t; 131 132 /* Role attributes */ 133 typedef struct role_datum { 134 symtab_datum_t s; 135 ebitmap_t dominates; /* set of roles dominated by this role */ 136 type_set_t types; /* set of authorized types for role */ 137 ebitmap_t cache; /* This is an expanded set used for context validation during parsing */ 138 uint32_t bounds; /* bounds role, if exist */ 139 #define ROLE_ROLE 0 /* regular role in kernel policies */ 140 #define ROLE_ATTRIB 1 /* attribute */ 141 uint32_t flavor; 142 ebitmap_t roles; /* roles with this attribute */ 143 } role_datum_t; 144 145 typedef struct role_trans { 146 uint32_t role; /* current role */ 147 uint32_t type; /* program executable type, or new object type */ 148 uint32_t tclass; /* process class, or new object class */ 149 uint32_t new_role; /* new role */ 150 struct role_trans *next; 151 } role_trans_t; 152 153 typedef struct role_allow { 154 uint32_t role; /* current role */ 155 uint32_t new_role; /* new role */ 156 struct role_allow *next; 157 } role_allow_t; 158 159 /* filename_trans rules */ 160 typedef struct filename_trans { 161 uint32_t stype; 162 uint32_t ttype; 163 uint32_t tclass; 164 char *name; 165 uint32_t otype; 166 struct filename_trans *next; 167 } filename_trans_t; 168 169 /* Type attributes */ 170 typedef struct type_datum { 171 symtab_datum_t s; 172 uint32_t primary; /* primary name? can be set to primary value if below is TYPE_ */ 173 #define TYPE_TYPE 0 /* regular type or alias in kernel policies */ 174 #define TYPE_ATTRIB 1 /* attribute */ 175 #define TYPE_ALIAS 2 /* alias in modular policy */ 176 uint32_t flavor; 177 ebitmap_t types; /* types with this attribute */ 178 #define TYPE_FLAGS_PERMISSIVE 0x01 179 uint32_t flags; 180 uint32_t bounds; /* bounds type, if exist */ 181 } type_datum_t; 182 183 /* 184 * Properties of type_datum 185 * available on the policy version >= (MOD_)POLICYDB_VERSION_BOUNDARY 186 */ 187 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 188 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 189 #define TYPEDATUM_PROPERTY_ALIAS 0x0004 /* userspace only */ 190 #define TYPEDATUM_PROPERTY_PERMISSIVE 0x0008 /* userspace only */ 191 192 /* User attributes */ 193 typedef struct user_datum { 194 symtab_datum_t s; 195 role_set_t roles; /* set of authorized roles for user */ 196 mls_semantic_range_t range; /* MLS range (min. - max.) for user */ 197 mls_semantic_level_t dfltlevel; /* default login MLS level for user */ 198 ebitmap_t cache; /* This is an expanded set used for context validation during parsing */ 199 mls_range_t exp_range; /* expanded range used for validation */ 200 mls_level_t exp_dfltlevel; /* expanded range used for validation */ 201 uint32_t bounds; /* bounds user, if exist */ 202 } user_datum_t; 203 204 /* Sensitivity attributes */ 205 typedef struct level_datum { 206 mls_level_t *level; /* sensitivity and associated categories */ 207 unsigned char isalias; /* is this sensitivity an alias for another? */ 208 unsigned char defined; 209 } level_datum_t; 210 211 /* Category attributes */ 212 typedef struct cat_datum { 213 symtab_datum_t s; 214 unsigned char isalias; /* is this category an alias for another? */ 215 } cat_datum_t; 216 217 typedef struct range_trans { 218 uint32_t source_type; 219 uint32_t target_type; 220 uint32_t target_class; 221 mls_range_t target_range; 222 struct range_trans *next; 223 } range_trans_t; 224 225 /* Boolean data type */ 226 typedef struct cond_bool_datum { 227 symtab_datum_t s; 228 int state; 229 #define COND_BOOL_FLAGS_TUNABLE 0x01 /* is this a tunable? */ 230 uint32_t flags; 231 } cond_bool_datum_t; 232 233 struct cond_node; 234 235 typedef struct cond_node cond_list_t; 236 struct cond_av_list; 237 238 typedef struct class_perm_node { 239 uint32_t tclass; 240 uint32_t data; /* permissions or new type */ 241 struct class_perm_node *next; 242 } class_perm_node_t; 243 244 #define xperm_test(x, p) (1 & (p[x >> 5] >> (x & 0x1f))) 245 #define xperm_set(x, p) (p[x >> 5] |= (1 << (x & 0x1f))) 246 #define xperm_clear(x, p) (p[x >> 5] &= ~(1 << (x & 0x1f))) 247 #define EXTENDED_PERMS_LEN 8 248 249 typedef struct av_extended_perms { 250 #define AVRULE_XPERMS_IOCTLFUNCTION 0x01 251 #define AVRULE_XPERMS_IOCTLDRIVER 0x02 252 uint8_t specified; 253 uint8_t driver; 254 /* 256 bits of permissions */ 255 uint32_t perms[EXTENDED_PERMS_LEN]; 256 } av_extended_perms_t; 257 258 typedef struct avrule { 259 /* these typedefs are almost exactly the same as those in avtab.h - they are 260 * here because of the need to include neverallow and dontaudit messages */ 261 #define AVRULE_ALLOWED 0x0001 262 #define AVRULE_AUDITALLOW 0x0002 263 #define AVRULE_AUDITDENY 0x0004 264 #define AVRULE_DONTAUDIT 0x0008 265 #define AVRULE_NEVERALLOW 0x0080 266 #define AVRULE_AV (AVRULE_ALLOWED | AVRULE_AUDITALLOW | AVRULE_AUDITDENY | AVRULE_DONTAUDIT | AVRULE_NEVERALLOW) 267 #define AVRULE_TRANSITION 0x0010 268 #define AVRULE_MEMBER 0x0020 269 #define AVRULE_CHANGE 0x0040 270 #define AVRULE_TYPE (AVRULE_TRANSITION | AVRULE_MEMBER | AVRULE_CHANGE) 271 #define AVRULE_XPERMS_ALLOWED 0x0100 272 #define AVRULE_XPERMS_AUDITALLOW 0x0200 273 #define AVRULE_XPERMS_DONTAUDIT 0x0400 274 #define AVRULE_XPERMS_NEVERALLOW 0x0800 275 #define AVRULE_XPERMS (AVRULE_XPERMS_ALLOWED | AVRULE_XPERMS_AUDITALLOW | \ 276 AVRULE_XPERMS_DONTAUDIT | AVRULE_XPERMS_NEVERALLOW) 277 uint32_t specified; 278 #define RULE_SELF 1 279 uint32_t flags; 280 type_set_t stypes; 281 type_set_t ttypes; 282 class_perm_node_t *perms; 283 av_extended_perms_t *xperms; 284 unsigned long line; /* line number from policy.conf where 285 * this rule originated */ 286 /* source file name and line number (e.g. .te file) */ 287 char *source_filename; 288 unsigned long source_line; 289 struct avrule *next; 290 } avrule_t; 291 292 typedef struct role_trans_rule { 293 role_set_t roles; /* current role */ 294 type_set_t types; /* program executable type, or new object type */ 295 ebitmap_t classes; /* process class, or new object class */ 296 uint32_t new_role; /* new role */ 297 struct role_trans_rule *next; 298 } role_trans_rule_t; 299 300 typedef struct role_allow_rule { 301 role_set_t roles; /* current role */ 302 role_set_t new_roles; /* new roles */ 303 struct role_allow_rule *next; 304 } role_allow_rule_t; 305 306 typedef struct filename_trans_rule { 307 type_set_t stypes; 308 type_set_t ttypes; 309 uint32_t tclass; 310 char *name; 311 uint32_t otype; /* new type */ 312 struct filename_trans_rule *next; 313 } filename_trans_rule_t; 314 315 typedef struct range_trans_rule { 316 type_set_t stypes; 317 type_set_t ttypes; 318 ebitmap_t tclasses; 319 mls_semantic_range_t trange; 320 struct range_trans_rule *next; 321 } range_trans_rule_t; 322 323 /* 324 * The configuration data includes security contexts for 325 * initial SIDs, unlabeled file systems, TCP and UDP port numbers, 326 * network interfaces, and nodes. This structure stores the 327 * relevant data for one such entry. Entries of the same kind 328 * (e.g. all initial SIDs) are linked together into a list. 329 */ 330 typedef struct ocontext { 331 union { 332 char *name; /* name of initial SID, fs, netif, fstype, path */ 333 struct { 334 uint8_t protocol; 335 uint16_t low_port; 336 uint16_t high_port; 337 } port; /* TCP or UDP port information */ 338 struct { 339 uint32_t addr; /* network order */ 340 uint32_t mask; /* network order */ 341 } node; /* node information */ 342 struct { 343 uint32_t addr[4]; /* network order */ 344 uint32_t mask[4]; /* network order */ 345 } node6; /* IPv6 node information */ 346 uint32_t device; 347 uint16_t pirq; 348 struct { 349 uint64_t low_iomem; 350 uint64_t high_iomem; 351 } iomem; 352 struct { 353 uint32_t low_ioport; 354 uint32_t high_ioport; 355 } ioport; 356 } u; 357 union { 358 uint32_t sclass; /* security class for genfs */ 359 uint32_t behavior; /* labeling behavior for fs_use */ 360 } v; 361 context_struct_t context[2]; /* security context(s) */ 362 sepol_security_id_t sid[2]; /* SID(s) */ 363 struct ocontext *next; 364 } ocontext_t; 365 366 typedef struct genfs { 367 char *fstype; 368 struct ocontext *head; 369 struct genfs *next; 370 } genfs_t; 371 372 /* symbol table array indices */ 373 #define SYM_COMMONS 0 374 #define SYM_CLASSES 1 375 #define SYM_ROLES 2 376 #define SYM_TYPES 3 377 #define SYM_USERS 4 378 #define SYM_BOOLS 5 379 #define SYM_LEVELS 6 380 #define SYM_CATS 7 381 #define SYM_NUM 8 382 383 /* object context array indices */ 384 #define OCON_ISID 0 /* initial SIDs */ 385 #define OCON_FS 1 /* unlabeled file systems */ 386 #define OCON_PORT 2 /* TCP and UDP port numbers */ 387 #define OCON_NETIF 3 /* network interfaces */ 388 #define OCON_NODE 4 /* nodes */ 389 #define OCON_FSUSE 5 /* fs_use */ 390 #define OCON_NODE6 6 /* IPv6 nodes */ 391 #define OCON_GENFS 7 /* needed for ocontext_supported */ 392 393 /* object context array indices for Xen */ 394 #define OCON_XEN_ISID 0 /* initial SIDs */ 395 #define OCON_XEN_PIRQ 1 /* physical irqs */ 396 #define OCON_XEN_IOPORT 2 /* io ports */ 397 #define OCON_XEN_IOMEM 3 /* io memory */ 398 #define OCON_XEN_PCIDEVICE 4 /* pci devices */ 399 #define OCON_XEN_DEVICETREE 5 /* device tree node */ 400 401 /* OCON_NUM needs to be the largest index in any platform's ocontext array */ 402 #define OCON_NUM 7 403 404 /* section: module information */ 405 406 /* scope_index_t holds all of the symbols that are in scope in a 407 * particular situation. The bitmaps are indices (and thus must 408 * subtract one) into the global policydb->scope array. */ 409 typedef struct scope_index { 410 ebitmap_t scope[SYM_NUM]; 411 #define p_classes_scope scope[SYM_CLASSES] 412 #define p_roles_scope scope[SYM_ROLES] 413 #define p_types_scope scope[SYM_TYPES] 414 #define p_users_scope scope[SYM_USERS] 415 #define p_bools_scope scope[SYM_BOOLS] 416 #define p_sens_scope scope[SYM_LEVELS] 417 #define p_cat_scope scope[SYM_CATS] 418 419 /* this array maps from class->value to the permissions within 420 * scope. if bit (perm->value - 1) is set in map 421 * class_perms_map[class->value - 1] then that permission is 422 * enabled for this class within this decl. */ 423 ebitmap_t *class_perms_map; 424 /* total number of classes in class_perms_map array */ 425 uint32_t class_perms_len; 426 } scope_index_t; 427 428 /* a list of declarations for a particular avrule_decl */ 429 430 /* These two structs declare a block of policy that has TE and RBAC 431 * statements and declarations. The root block (the global policy) 432 * can never have an ELSE branch. */ 433 typedef struct avrule_decl { 434 uint32_t decl_id; 435 uint32_t enabled; /* whether this block is enabled */ 436 437 cond_list_t *cond_list; 438 avrule_t *avrules; 439 role_trans_rule_t *role_tr_rules; 440 role_allow_rule_t *role_allow_rules; 441 range_trans_rule_t *range_tr_rules; 442 scope_index_t required; /* symbols needed to activate this block */ 443 scope_index_t declared; /* symbols declared within this block */ 444 445 /* type transition rules with a 'name' component */ 446 filename_trans_rule_t *filename_trans_rules; 447 448 /* for additive statements (type attribute, roles, and users) */ 449 symtab_t symtab[SYM_NUM]; 450 451 /* In a linked module this will contain the name of the module 452 * from which this avrule_decl originated. */ 453 char *module_name; 454 455 struct avrule_decl *next; 456 } avrule_decl_t; 457 458 typedef struct avrule_block { 459 avrule_decl_t *branch_list; 460 avrule_decl_t *enabled; /* pointer to which branch is enabled. this is 461 used in linking and never written to disk */ 462 #define AVRULE_OPTIONAL 1 463 uint32_t flags; /* any flags for this block, currently just optional */ 464 struct avrule_block *next; 465 } avrule_block_t; 466 467 /* Every identifier has its own scope datum. The datum describes if 468 * the item is to be included into the final policy during 469 * expansion. */ 470 typedef struct scope_datum { 471 /* Required for this decl */ 472 #define SCOPE_REQ 1 473 /* Declared in this decl */ 474 #define SCOPE_DECL 2 475 uint32_t scope; 476 uint32_t *decl_ids; 477 uint32_t decl_ids_len; 478 /* decl_ids is a list of avrule_decl's that declare/require 479 * this symbol. If scope==SCOPE_DECL then this is a list of 480 * declarations. If the symbol may only be declared once 481 * (types, bools) then decl_ids_len will be exactly 1. For 482 * implicitly declared things (roles, users) then decl_ids_len 483 * will be at least 1. */ 484 } scope_datum_t; 485 486 /* The policy database */ 487 typedef struct policydb { 488 #define POLICY_KERN SEPOL_POLICY_KERN 489 #define POLICY_BASE SEPOL_POLICY_BASE 490 #define POLICY_MOD SEPOL_POLICY_MOD 491 uint32_t policy_type; 492 char *name; 493 char *version; 494 int target_platform; 495 496 /* Set when the policydb is modified such that writing is unsupported */ 497 int unsupported_format; 498 499 /* Whether this policydb is mls, should always be set */ 500 int mls; 501 502 /* symbol tables */ 503 symtab_t symtab[SYM_NUM]; 504 #define p_commons symtab[SYM_COMMONS] 505 #define p_classes symtab[SYM_CLASSES] 506 #define p_roles symtab[SYM_ROLES] 507 #define p_types symtab[SYM_TYPES] 508 #define p_users symtab[SYM_USERS] 509 #define p_bools symtab[SYM_BOOLS] 510 #define p_levels symtab[SYM_LEVELS] 511 #define p_cats symtab[SYM_CATS] 512 513 /* symbol names indexed by (value - 1) */ 514 char **sym_val_to_name[SYM_NUM]; 515 #define p_common_val_to_name sym_val_to_name[SYM_COMMONS] 516 #define p_class_val_to_name sym_val_to_name[SYM_CLASSES] 517 #define p_role_val_to_name sym_val_to_name[SYM_ROLES] 518 #define p_type_val_to_name sym_val_to_name[SYM_TYPES] 519 #define p_user_val_to_name sym_val_to_name[SYM_USERS] 520 #define p_bool_val_to_name sym_val_to_name[SYM_BOOLS] 521 #define p_sens_val_to_name sym_val_to_name[SYM_LEVELS] 522 #define p_cat_val_to_name sym_val_to_name[SYM_CATS] 523 524 /* class, role, and user attributes indexed by (value - 1) */ 525 class_datum_t **class_val_to_struct; 526 role_datum_t **role_val_to_struct; 527 user_datum_t **user_val_to_struct; 528 type_datum_t **type_val_to_struct; 529 530 /* module stuff section -- used in parsing and for modules */ 531 532 /* keep track of the scope for every identifier. these are 533 * hash tables, where the key is the identifier name and value 534 * a scope_datum_t. as a convenience, one may use the 535 * p_*_macros (cf. struct scope_index_t declaration). */ 536 symtab_t scope[SYM_NUM]; 537 538 /* module rule storage */ 539 avrule_block_t *global; 540 /* avrule_decl index used for link/expand */ 541 avrule_decl_t **decl_val_to_struct; 542 543 /* compiled storage of rules - use for the kernel policy */ 544 545 /* type enforcement access vectors and transitions */ 546 avtab_t te_avtab; 547 548 /* bools indexed by (value - 1) */ 549 cond_bool_datum_t **bool_val_to_struct; 550 /* type enforcement conditional access vectors and transitions */ 551 avtab_t te_cond_avtab; 552 /* linked list indexing te_cond_avtab by conditional */ 553 cond_list_t *cond_list; 554 555 /* role transitions */ 556 role_trans_t *role_tr; 557 558 /* type transition rules with a 'name' component */ 559 filename_trans_t *filename_trans; 560 561 /* role allows */ 562 role_allow_t *role_allow; 563 564 /* security contexts of initial SIDs, unlabeled file systems, 565 TCP or UDP port numbers, network interfaces and nodes */ 566 ocontext_t *ocontexts[OCON_NUM]; 567 568 /* security contexts for files in filesystems that cannot support 569 a persistent label mapping or use another 570 fixed labeling behavior. */ 571 genfs_t *genfs; 572 573 /* range transitions */ 574 range_trans_t *range_tr; 575 576 ebitmap_t *type_attr_map; 577 578 ebitmap_t *attr_type_map; /* not saved in the binary policy */ 579 580 ebitmap_t policycaps; 581 582 /* this bitmap is referenced by type NOT the typical type-1 used in other 583 bitmaps. Someday the 0 bit may be used for global permissive */ 584 ebitmap_t permissive_map; 585 586 unsigned policyvers; 587 588 unsigned handle_unknown; 589 } policydb_t; 590 591 struct sepol_policydb { 592 struct policydb p; 593 }; 594 595 extern int policydb_init(policydb_t * p); 596 597 extern int policydb_from_image(sepol_handle_t * handle, 598 void *data, size_t len, policydb_t * policydb); 599 600 extern int policydb_to_image(sepol_handle_t * handle, 601 policydb_t * policydb, void **newdata, 602 size_t * newlen); 603 604 extern int policydb_index_classes(policydb_t * p); 605 606 extern int policydb_index_bools(policydb_t * p); 607 608 extern int policydb_index_others(sepol_handle_t * handle, policydb_t * p, 609 unsigned int verbose); 610 611 extern int policydb_reindex_users(policydb_t * p); 612 613 extern void policydb_destroy(policydb_t * p); 614 615 extern int policydb_load_isids(policydb_t * p, sidtab_t * s); 616 617 /* Deprecated */ 618 extern int policydb_context_isvalid(const policydb_t * p, 619 const context_struct_t * c); 620 621 extern void symtabs_destroy(symtab_t * symtab); 622 extern int scope_destroy(hashtab_key_t key, hashtab_datum_t datum, void *p); 623 typedef void (*hashtab_destroy_func_t) (hashtab_key_t k, hashtab_datum_t d, 624 void *args); 625 extern hashtab_destroy_func_t get_symtab_destroy_func(int sym_num); 626 627 extern void class_perm_node_init(class_perm_node_t * x); 628 extern void type_set_init(type_set_t * x); 629 extern void type_set_destroy(type_set_t * x); 630 extern int type_set_cpy(type_set_t * dst, type_set_t * src); 631 extern int type_set_or_eq(type_set_t * dst, type_set_t * other); 632 extern void role_set_init(role_set_t * x); 633 extern void role_set_destroy(role_set_t * x); 634 extern void avrule_init(avrule_t * x); 635 extern void avrule_destroy(avrule_t * x); 636 extern void avrule_list_destroy(avrule_t * x); 637 extern void role_trans_rule_init(role_trans_rule_t * x); 638 extern void role_trans_rule_list_destroy(role_trans_rule_t * x); 639 extern void filename_trans_rule_init(filename_trans_rule_t * x); 640 extern void filename_trans_rule_list_destroy(filename_trans_rule_t * x); 641 642 extern void role_datum_init(role_datum_t * x); 643 extern void role_datum_destroy(role_datum_t * x); 644 extern void role_allow_rule_init(role_allow_rule_t * x); 645 extern void role_allow_rule_destroy(role_allow_rule_t * x); 646 extern void role_allow_rule_list_destroy(role_allow_rule_t * x); 647 extern void range_trans_rule_init(range_trans_rule_t *x); 648 extern void range_trans_rule_destroy(range_trans_rule_t *x); 649 extern void range_trans_rule_list_destroy(range_trans_rule_t *x); 650 extern void type_datum_init(type_datum_t * x); 651 extern void type_datum_destroy(type_datum_t * x); 652 extern void user_datum_init(user_datum_t * x); 653 extern void user_datum_destroy(user_datum_t * x); 654 extern void level_datum_init(level_datum_t * x); 655 extern void level_datum_destroy(level_datum_t * x); 656 extern void cat_datum_init(cat_datum_t * x); 657 extern void cat_datum_destroy(cat_datum_t * x); 658 extern int check_assertion(policydb_t *p, avrule_t *avrule); 659 extern int check_assertions(sepol_handle_t * handle, 660 policydb_t * p, avrule_t * avrules); 661 662 extern int symtab_insert(policydb_t * x, uint32_t sym, 663 hashtab_key_t key, hashtab_datum_t datum, 664 uint32_t scope, uint32_t avrule_decl_id, 665 uint32_t * value); 666 667 /* A policy "file" may be a memory region referenced by a (data, len) pair 668 or a file referenced by a FILE pointer. */ 669 typedef struct policy_file { 670 #define PF_USE_MEMORY 0 671 #define PF_USE_STDIO 1 672 #define PF_LEN 2 /* total up length in len field */ 673 unsigned type; 674 char *data; 675 size_t len; 676 size_t size; 677 FILE *fp; 678 struct sepol_handle *handle; 679 } policy_file_t; 680 681 struct sepol_policy_file { 682 struct policy_file pf; 683 }; 684 685 extern void policy_file_init(policy_file_t * x); 686 687 extern int policydb_read(policydb_t * p, struct policy_file *fp, 688 unsigned int verbose); 689 extern int avrule_read_list(policydb_t * p, avrule_t ** avrules, 690 struct policy_file *fp); 691 692 extern int policydb_write(struct policydb *p, struct policy_file *pf); 693 extern int policydb_set_target_platform(policydb_t *p, int platform); 694 695 #define PERM_SYMTAB_SIZE 32 696 697 /* Identify specific policy version changes */ 698 #define POLICYDB_VERSION_BASE 15 699 #define POLICYDB_VERSION_BOOL 16 700 #define POLICYDB_VERSION_IPV6 17 701 #define POLICYDB_VERSION_NLCLASS 18 702 #define POLICYDB_VERSION_VALIDATETRANS 19 703 #define POLICYDB_VERSION_MLS 19 704 #define POLICYDB_VERSION_AVTAB 20 705 #define POLICYDB_VERSION_RANGETRANS 21 706 #define POLICYDB_VERSION_POLCAP 22 707 #define POLICYDB_VERSION_PERMISSIVE 23 708 #define POLICYDB_VERSION_BOUNDARY 24 709 #define POLICYDB_VERSION_FILENAME_TRANS 25 710 #define POLICYDB_VERSION_ROLETRANS 26 711 #define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27 712 #define POLICYDB_VERSION_DEFAULT_TYPE 28 713 #define POLICYDB_VERSION_CONSTRAINT_NAMES 29 714 #define POLICYDB_VERSION_XEN_DEVICETREE 30 /* Xen-specific */ 715 #define POLICYDB_VERSION_XPERMS_IOCTL 30 /* Linux-specific */ 716 717 /* Range of policy versions we understand*/ 718 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 719 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_XPERMS_IOCTL 720 721 /* Module versions and specific changes*/ 722 #define MOD_POLICYDB_VERSION_BASE 4 723 #define MOD_POLICYDB_VERSION_VALIDATETRANS 5 724 #define MOD_POLICYDB_VERSION_MLS 5 725 #define MOD_POLICYDB_VERSION_RANGETRANS 6 726 #define MOD_POLICYDB_VERSION_MLS_USERS 6 727 #define MOD_POLICYDB_VERSION_POLCAP 7 728 #define MOD_POLICYDB_VERSION_PERMISSIVE 8 729 #define MOD_POLICYDB_VERSION_BOUNDARY 9 730 #define MOD_POLICYDB_VERSION_BOUNDARY_ALIAS 10 731 #define MOD_POLICYDB_VERSION_FILENAME_TRANS 11 732 #define MOD_POLICYDB_VERSION_ROLETRANS 12 733 #define MOD_POLICYDB_VERSION_ROLEATTRIB 13 734 #define MOD_POLICYDB_VERSION_TUNABLE_SEP 14 735 #define MOD_POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 15 736 #define MOD_POLICYDB_VERSION_DEFAULT_TYPE 16 737 #define MOD_POLICYDB_VERSION_CONSTRAINT_NAMES 17 738 739 #define MOD_POLICYDB_VERSION_MIN MOD_POLICYDB_VERSION_BASE 740 #define MOD_POLICYDB_VERSION_MAX MOD_POLICYDB_VERSION_CONSTRAINT_NAMES 741 742 #define POLICYDB_CONFIG_MLS 1 743 744 /* macros to check policy feature */ 745 746 /* TODO: add other features here */ 747 748 #define policydb_has_boundary_feature(p) \ 749 (((p)->policy_type == POLICY_KERN \ 750 && p->policyvers >= POLICYDB_VERSION_BOUNDARY) || \ 751 ((p)->policy_type != POLICY_KERN \ 752 && p->policyvers >= MOD_POLICYDB_VERSION_BOUNDARY)) 753 754 /* the config flags related to unknown classes/perms are bits 2 and 3 */ 755 #define DENY_UNKNOWN SEPOL_DENY_UNKNOWN 756 #define REJECT_UNKNOWN SEPOL_REJECT_UNKNOWN 757 #define ALLOW_UNKNOWN SEPOL_ALLOW_UNKNOWN 758 759 #define POLICYDB_CONFIG_UNKNOWN_MASK (DENY_UNKNOWN | REJECT_UNKNOWN | ALLOW_UNKNOWN) 760 761 #define OBJECT_R "object_r" 762 #define OBJECT_R_VAL 1 763 764 #define POLICYDB_MAGIC SELINUX_MAGIC 765 #define POLICYDB_STRING "SE Linux" 766 #define POLICYDB_XEN_STRING "XenFlask" 767 #define POLICYDB_STRING_MAX_LENGTH 32 768 #define POLICYDB_MOD_MAGIC SELINUX_MOD_MAGIC 769 #define POLICYDB_MOD_STRING "SE Linux Module" 770 771 __END_DECLS 772 #endif /* _POLICYDB_H_ */ 773 774 /* FLASK */ 775