1 /* Author : Stephen Smalley, <sds (at) tycho.nsa.gov> */ 2 3 /* 4 * Updated: Joshua Brindle <jbrindle (at) tresys.com> 5 * Karl MacMillan <kmacmillan (at) tresys.com> 6 * Jason Tang <jtang (at) tresys.com> 7 * 8 * Module support 9 * 10 * Updated: Trusted Computer Solutions, Inc. <dgoeddel (at) trustedcs.com> 11 * 12 * Support for enhanced MLS infrastructure. 13 * 14 * Updated: Frank Mayer <mayerf (at) tresys.com> and Karl MacMillan <kmacmillan (at) tresys.com> 15 * 16 * Added conditional policy language extensions 17 * 18 * Updated: Red Hat, Inc. James Morris <jmorris (at) 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 * Copyright (C) 2017 Mellanox Techonolgies Inc. 28 * 29 * This library is free software; you can redistribute it and/or 30 * modify it under the terms of the GNU Lesser General Public 31 * License as published by the Free Software Foundation; either 32 * version 2.1 of the License, or (at your option) any later version. 33 * 34 * This library is distributed in the hope that it will be useful, 35 * but WITHOUT ANY WARRANTY; without even the implied warranty of 36 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 37 * Lesser General Public License for more details. 38 * 39 * You should have received a copy of the GNU Lesser General Public 40 * License along with this library; if not, write to the Free Software 41 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 42 */ 43 44 /* FLASK */ 45 46 /* 47 * A policy database (policydb) specifies the 48 * configuration data for the security policy. 49 */ 50 51 #ifndef _SEPOL_POLICYDB_POLICYDB_H_ 52 #define _SEPOL_POLICYDB_POLICYDB_H_ 53 54 #include <stdio.h> 55 #include <stddef.h> 56 57 #include <sepol/policydb.h> 58 59 #include <sepol/policydb/flask_types.h> 60 #include <sepol/policydb/symtab.h> 61 #include <sepol/policydb/avtab.h> 62 #include <sepol/policydb/context.h> 63 #include <sepol/policydb/constraint.h> 64 #include <sepol/policydb/sidtab.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 #ifdef __cplusplus 73 extern "C" { 74 #endif 75 76 #define IB_DEVICE_NAME_MAX 64 77 78 /* 79 * A datum type is defined for each kind of symbol 80 * in the configuration data: individual permissions, 81 * common prefixes for access vectors, classes, 82 * users, roles, types, sensitivities, categories, etc. 83 */ 84 85 /* type set preserves data needed by modules such as *, ~ and attributes */ 86 typedef struct type_set { 87 ebitmap_t types; 88 ebitmap_t negset; 89 #define TYPE_STAR 1 90 #define TYPE_COMP 2 91 uint32_t flags; 92 } type_set_t; 93 94 typedef struct role_set { 95 ebitmap_t roles; 96 #define ROLE_STAR 1 97 #define ROLE_COMP 2 98 uint32_t flags; 99 } role_set_t; 100 101 /* Permission attributes */ 102 typedef struct perm_datum { 103 symtab_datum_t s; 104 } perm_datum_t; 105 106 /* Attributes of a common prefix for access vectors */ 107 typedef struct common_datum { 108 symtab_datum_t s; 109 symtab_t permissions; /* common permissions */ 110 } common_datum_t; 111 112 /* Class attributes */ 113 typedef struct class_datum { 114 symtab_datum_t s; 115 char *comkey; /* common name */ 116 common_datum_t *comdatum; /* common datum */ 117 symtab_t permissions; /* class-specific permission symbol table */ 118 constraint_node_t *constraints; /* constraints on class permissions */ 119 constraint_node_t *validatetrans; /* special transition rules */ 120 /* Options how a new object user and role should be decided */ 121 #define DEFAULT_SOURCE 1 122 #define DEFAULT_TARGET 2 123 char default_user; 124 char default_role; 125 char default_type; 126 /* Options how a new object range should be decided */ 127 #define DEFAULT_SOURCE_LOW 1 128 #define DEFAULT_SOURCE_HIGH 2 129 #define DEFAULT_SOURCE_LOW_HIGH 3 130 #define DEFAULT_TARGET_LOW 4 131 #define DEFAULT_TARGET_HIGH 5 132 #define DEFAULT_TARGET_LOW_HIGH 6 133 char default_range; 134 } class_datum_t; 135 136 /* Role attributes */ 137 typedef struct role_datum { 138 symtab_datum_t s; 139 ebitmap_t dominates; /* set of roles dominated by this role */ 140 type_set_t types; /* set of authorized types for role */ 141 ebitmap_t cache; /* This is an expanded set used for context validation during parsing */ 142 uint32_t bounds; /* bounds role, if exist */ 143 #define ROLE_ROLE 0 /* regular role in kernel policies */ 144 #define ROLE_ATTRIB 1 /* attribute */ 145 uint32_t flavor; 146 ebitmap_t roles; /* roles with this attribute */ 147 } role_datum_t; 148 149 typedef struct role_trans { 150 uint32_t role; /* current role */ 151 uint32_t type; /* program executable type, or new object type */ 152 uint32_t tclass; /* process class, or new object class */ 153 uint32_t new_role; /* new role */ 154 struct role_trans *next; 155 } role_trans_t; 156 157 typedef struct role_allow { 158 uint32_t role; /* current role */ 159 uint32_t new_role; /* new role */ 160 struct role_allow *next; 161 } role_allow_t; 162 163 /* filename_trans rules */ 164 typedef struct filename_trans { 165 uint32_t stype; 166 uint32_t ttype; 167 uint32_t tclass; 168 char *name; 169 } filename_trans_t; 170 171 typedef struct filename_trans_datum { 172 uint32_t otype; /* expected of new object */ 173 } filename_trans_datum_t; 174 175 /* Type attributes */ 176 typedef struct type_datum { 177 symtab_datum_t s; 178 uint32_t primary; /* primary name? can be set to primary value if below is TYPE_ */ 179 #define TYPE_TYPE 0 /* regular type or alias in kernel policies */ 180 #define TYPE_ATTRIB 1 /* attribute */ 181 #define TYPE_ALIAS 2 /* alias in modular policy */ 182 uint32_t flavor; 183 ebitmap_t types; /* types with this attribute */ 184 #define TYPE_FLAGS_PERMISSIVE (1 << 0) 185 #define TYPE_FLAGS_EXPAND_ATTR_TRUE (1 << 1) 186 #define TYPE_FLAGS_EXPAND_ATTR_FALSE (1 << 2) 187 #define TYPE_FLAGS_EXPAND_ATTR (TYPE_FLAGS_EXPAND_ATTR_TRUE | \ 188 TYPE_FLAGS_EXPAND_ATTR_FALSE) 189 uint32_t flags; 190 uint32_t bounds; /* bounds type, if exist */ 191 } type_datum_t; 192 193 /* 194 * Properties of type_datum 195 * available on the policy version >= (MOD_)POLICYDB_VERSION_BOUNDARY 196 */ 197 #define TYPEDATUM_PROPERTY_PRIMARY 0x0001 198 #define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 199 #define TYPEDATUM_PROPERTY_ALIAS 0x0004 /* userspace only */ 200 #define TYPEDATUM_PROPERTY_PERMISSIVE 0x0008 /* userspace only */ 201 202 /* User attributes */ 203 typedef struct user_datum { 204 symtab_datum_t s; 205 role_set_t roles; /* set of authorized roles for user */ 206 mls_semantic_range_t range; /* MLS range (min. - max.) for user */ 207 mls_semantic_level_t dfltlevel; /* default login MLS level for user */ 208 ebitmap_t cache; /* This is an expanded set used for context validation during parsing */ 209 mls_range_t exp_range; /* expanded range used for validation */ 210 mls_level_t exp_dfltlevel; /* expanded range used for validation */ 211 uint32_t bounds; /* bounds user, if exist */ 212 } user_datum_t; 213 214 /* Sensitivity attributes */ 215 typedef struct level_datum { 216 mls_level_t *level; /* sensitivity and associated categories */ 217 unsigned char isalias; /* is this sensitivity an alias for another? */ 218 unsigned char defined; 219 } level_datum_t; 220 221 /* Category attributes */ 222 typedef struct cat_datum { 223 symtab_datum_t s; 224 unsigned char isalias; /* is this category an alias for another? */ 225 } cat_datum_t; 226 227 typedef struct range_trans { 228 uint32_t source_type; 229 uint32_t target_type; 230 uint32_t target_class; 231 } range_trans_t; 232 233 /* Boolean data type */ 234 typedef struct cond_bool_datum { 235 symtab_datum_t s; 236 int state; 237 #define COND_BOOL_FLAGS_TUNABLE 0x01 /* is this a tunable? */ 238 uint32_t flags; 239 } cond_bool_datum_t; 240 241 struct cond_node; 242 243 typedef struct cond_node cond_list_t; 244 struct cond_av_list; 245 246 typedef struct class_perm_node { 247 uint32_t tclass; 248 uint32_t data; /* permissions or new type */ 249 struct class_perm_node *next; 250 } class_perm_node_t; 251 252 #define xperm_test(x, p) (1 & (p[x >> 5] >> (x & 0x1f))) 253 #define xperm_set(x, p) (p[x >> 5] |= (1 << (x & 0x1f))) 254 #define xperm_clear(x, p) (p[x >> 5] &= ~(1 << (x & 0x1f))) 255 #define EXTENDED_PERMS_LEN 8 256 257 typedef struct av_extended_perms { 258 #define AVRULE_XPERMS_IOCTLFUNCTION 0x01 259 #define AVRULE_XPERMS_IOCTLDRIVER 0x02 260 uint8_t specified; 261 uint8_t driver; 262 /* 256 bits of permissions */ 263 uint32_t perms[EXTENDED_PERMS_LEN]; 264 } av_extended_perms_t; 265 266 typedef struct avrule { 267 /* these typedefs are almost exactly the same as those in avtab.h - they are 268 * here because of the need to include neverallow and dontaudit messages */ 269 #define AVRULE_ALLOWED AVTAB_ALLOWED 270 #define AVRULE_AUDITALLOW AVTAB_AUDITALLOW 271 #define AVRULE_AUDITDENY AVTAB_AUDITDENY 272 #define AVRULE_DONTAUDIT 0x0008 273 #define AVRULE_NEVERALLOW AVTAB_NEVERALLOW 274 #define AVRULE_AV (AVRULE_ALLOWED | AVRULE_AUDITALLOW | AVRULE_AUDITDENY | AVRULE_DONTAUDIT | AVRULE_NEVERALLOW) 275 #define AVRULE_TRANSITION AVTAB_TRANSITION 276 #define AVRULE_MEMBER AVTAB_MEMBER 277 #define AVRULE_CHANGE AVTAB_CHANGE 278 #define AVRULE_TYPE (AVRULE_TRANSITION | AVRULE_MEMBER | AVRULE_CHANGE) 279 #define AVRULE_XPERMS_ALLOWED AVTAB_XPERMS_ALLOWED 280 #define AVRULE_XPERMS_AUDITALLOW AVTAB_XPERMS_AUDITALLOW 281 #define AVRULE_XPERMS_DONTAUDIT AVTAB_XPERMS_DONTAUDIT 282 #define AVRULE_XPERMS_NEVERALLOW AVTAB_XPERMS_NEVERALLOW 283 #define AVRULE_XPERMS (AVRULE_XPERMS_ALLOWED | AVRULE_XPERMS_AUDITALLOW | \ 284 AVRULE_XPERMS_DONTAUDIT | AVRULE_XPERMS_NEVERALLOW) 285 uint32_t specified; 286 #define RULE_SELF 1 287 uint32_t flags; 288 type_set_t stypes; 289 type_set_t ttypes; 290 class_perm_node_t *perms; 291 av_extended_perms_t *xperms; 292 unsigned long line; /* line number from policy.conf where 293 * this rule originated */ 294 /* source file name and line number (e.g. .te file) */ 295 char *source_filename; 296 unsigned long source_line; 297 struct avrule *next; 298 } avrule_t; 299 300 typedef struct role_trans_rule { 301 role_set_t roles; /* current role */ 302 type_set_t types; /* program executable type, or new object type */ 303 ebitmap_t classes; /* process class, or new object class */ 304 uint32_t new_role; /* new role */ 305 struct role_trans_rule *next; 306 } role_trans_rule_t; 307 308 typedef struct role_allow_rule { 309 role_set_t roles; /* current role */ 310 role_set_t new_roles; /* new roles */ 311 struct role_allow_rule *next; 312 } role_allow_rule_t; 313 314 typedef struct filename_trans_rule { 315 type_set_t stypes; 316 type_set_t ttypes; 317 uint32_t tclass; 318 char *name; 319 uint32_t otype; /* new type */ 320 struct filename_trans_rule *next; 321 } filename_trans_rule_t; 322 323 typedef struct range_trans_rule { 324 type_set_t stypes; 325 type_set_t ttypes; 326 ebitmap_t tclasses; 327 mls_semantic_range_t trange; 328 struct range_trans_rule *next; 329 } range_trans_rule_t; 330 331 /* 332 * The configuration data includes security contexts for 333 * initial SIDs, unlabeled file systems, TCP and UDP port numbers, 334 * network interfaces, and nodes. This structure stores the 335 * relevant data for one such entry. Entries of the same kind 336 * (e.g. all initial SIDs) are linked together into a list. 337 */ 338 typedef struct ocontext { 339 union { 340 char *name; /* name of initial SID, fs, netif, fstype, path */ 341 struct { 342 uint8_t protocol; 343 uint16_t low_port; 344 uint16_t high_port; 345 } port; /* TCP or UDP port information */ 346 struct { 347 uint32_t addr; /* network order */ 348 uint32_t mask; /* network order */ 349 } node; /* node information */ 350 struct { 351 uint32_t addr[4]; /* network order */ 352 uint32_t mask[4]; /* network order */ 353 } node6; /* IPv6 node information */ 354 uint32_t device; 355 uint16_t pirq; 356 struct { 357 uint64_t low_iomem; 358 uint64_t high_iomem; 359 } iomem; 360 struct { 361 uint32_t low_ioport; 362 uint32_t high_ioport; 363 } ioport; 364 struct { 365 uint64_t subnet_prefix; 366 uint16_t low_pkey; 367 uint16_t high_pkey; 368 } ibpkey; 369 struct { 370 char *dev_name; 371 uint8_t port; 372 } ibendport; 373 } u; 374 union { 375 uint32_t sclass; /* security class for genfs */ 376 uint32_t behavior; /* labeling behavior for fs_use */ 377 } v; 378 context_struct_t context[2]; /* security context(s) */ 379 sepol_security_id_t sid[2]; /* SID(s) */ 380 struct ocontext *next; 381 } ocontext_t; 382 383 typedef struct genfs { 384 char *fstype; 385 struct ocontext *head; 386 struct genfs *next; 387 } genfs_t; 388 389 /* symbol table array indices */ 390 #define SYM_COMMONS 0 391 #define SYM_CLASSES 1 392 #define SYM_ROLES 2 393 #define SYM_TYPES 3 394 #define SYM_USERS 4 395 #define SYM_BOOLS 5 396 #define SYM_LEVELS 6 397 #define SYM_CATS 7 398 #define SYM_NUM 8 399 400 /* object context array indices */ 401 #define OCON_ISID 0 /* initial SIDs */ 402 #define OCON_FS 1 /* unlabeled file systems */ 403 #define OCON_PORT 2 /* TCP and UDP port numbers */ 404 #define OCON_NETIF 3 /* network interfaces */ 405 #define OCON_NODE 4 /* nodes */ 406 #define OCON_FSUSE 5 /* fs_use */ 407 #define OCON_NODE6 6 /* IPv6 nodes */ 408 #define OCON_IBPKEY 7 /* Infiniband PKEY */ 409 #define OCON_IBENDPORT 8 /* Infiniband End Port */ 410 411 /* object context array indices for Xen */ 412 #define OCON_XEN_ISID 0 /* initial SIDs */ 413 #define OCON_XEN_PIRQ 1 /* physical irqs */ 414 #define OCON_XEN_IOPORT 2 /* io ports */ 415 #define OCON_XEN_IOMEM 3 /* io memory */ 416 #define OCON_XEN_PCIDEVICE 4 /* pci devices */ 417 #define OCON_XEN_DEVICETREE 5 /* device tree node */ 418 419 /* OCON_NUM needs to be the largest index in any platform's ocontext array */ 420 #define OCON_NUM 9 421 422 /* section: module information */ 423 424 /* scope_index_t holds all of the symbols that are in scope in a 425 * particular situation. The bitmaps are indices (and thus must 426 * subtract one) into the global policydb->scope array. */ 427 typedef struct scope_index { 428 ebitmap_t scope[SYM_NUM]; 429 #define p_classes_scope scope[SYM_CLASSES] 430 #define p_roles_scope scope[SYM_ROLES] 431 #define p_types_scope scope[SYM_TYPES] 432 #define p_users_scope scope[SYM_USERS] 433 #define p_bools_scope scope[SYM_BOOLS] 434 #define p_sens_scope scope[SYM_LEVELS] 435 #define p_cat_scope scope[SYM_CATS] 436 437 /* this array maps from class->value to the permissions within 438 * scope. if bit (perm->value - 1) is set in map 439 * class_perms_map[class->value - 1] then that permission is 440 * enabled for this class within this decl. */ 441 ebitmap_t *class_perms_map; 442 /* total number of classes in class_perms_map array */ 443 uint32_t class_perms_len; 444 } scope_index_t; 445 446 /* a list of declarations for a particular avrule_decl */ 447 448 /* These two structs declare a block of policy that has TE and RBAC 449 * statements and declarations. The root block (the global policy) 450 * can never have an ELSE branch. */ 451 typedef struct avrule_decl { 452 uint32_t decl_id; 453 uint32_t enabled; /* whether this block is enabled */ 454 455 cond_list_t *cond_list; 456 avrule_t *avrules; 457 role_trans_rule_t *role_tr_rules; 458 role_allow_rule_t *role_allow_rules; 459 range_trans_rule_t *range_tr_rules; 460 scope_index_t required; /* symbols needed to activate this block */ 461 scope_index_t declared; /* symbols declared within this block */ 462 463 /* type transition rules with a 'name' component */ 464 filename_trans_rule_t *filename_trans_rules; 465 466 /* for additive statements (type attribute, roles, and users) */ 467 symtab_t symtab[SYM_NUM]; 468 469 /* In a linked module this will contain the name of the module 470 * from which this avrule_decl originated. */ 471 char *module_name; 472 473 struct avrule_decl *next; 474 } avrule_decl_t; 475 476 typedef struct avrule_block { 477 avrule_decl_t *branch_list; 478 avrule_decl_t *enabled; /* pointer to which branch is enabled. this is 479 used in linking and never written to disk */ 480 #define AVRULE_OPTIONAL 1 481 uint32_t flags; /* any flags for this block, currently just optional */ 482 struct avrule_block *next; 483 } avrule_block_t; 484 485 /* Every identifier has its own scope datum. The datum describes if 486 * the item is to be included into the final policy during 487 * expansion. */ 488 typedef struct scope_datum { 489 /* Required for this decl */ 490 #define SCOPE_REQ 1 491 /* Declared in this decl */ 492 #define SCOPE_DECL 2 493 uint32_t scope; 494 uint32_t *decl_ids; 495 uint32_t decl_ids_len; 496 /* decl_ids is a list of avrule_decl's that declare/require 497 * this symbol. If scope==SCOPE_DECL then this is a list of 498 * declarations. If the symbol may only be declared once 499 * (types, bools) then decl_ids_len will be exactly 1. For 500 * implicitly declared things (roles, users) then decl_ids_len 501 * will be at least 1. */ 502 } scope_datum_t; 503 504 /* The policy database */ 505 typedef struct policydb { 506 #define POLICY_KERN SEPOL_POLICY_KERN 507 #define POLICY_BASE SEPOL_POLICY_BASE 508 #define POLICY_MOD SEPOL_POLICY_MOD 509 uint32_t policy_type; 510 char *name; 511 char *version; 512 int target_platform; 513 514 /* Set when the policydb is modified such that writing is unsupported */ 515 int unsupported_format; 516 517 /* Whether this policydb is mls, should always be set */ 518 int mls; 519 520 /* symbol tables */ 521 symtab_t symtab[SYM_NUM]; 522 #define p_commons symtab[SYM_COMMONS] 523 #define p_classes symtab[SYM_CLASSES] 524 #define p_roles symtab[SYM_ROLES] 525 #define p_types symtab[SYM_TYPES] 526 #define p_users symtab[SYM_USERS] 527 #define p_bools symtab[SYM_BOOLS] 528 #define p_levels symtab[SYM_LEVELS] 529 #define p_cats symtab[SYM_CATS] 530 531 /* symbol names indexed by (value - 1) */ 532 char **sym_val_to_name[SYM_NUM]; 533 #define p_common_val_to_name sym_val_to_name[SYM_COMMONS] 534 #define p_class_val_to_name sym_val_to_name[SYM_CLASSES] 535 #define p_role_val_to_name sym_val_to_name[SYM_ROLES] 536 #define p_type_val_to_name sym_val_to_name[SYM_TYPES] 537 #define p_user_val_to_name sym_val_to_name[SYM_USERS] 538 #define p_bool_val_to_name sym_val_to_name[SYM_BOOLS] 539 #define p_sens_val_to_name sym_val_to_name[SYM_LEVELS] 540 #define p_cat_val_to_name sym_val_to_name[SYM_CATS] 541 542 /* class, role, and user attributes indexed by (value - 1) */ 543 class_datum_t **class_val_to_struct; 544 role_datum_t **role_val_to_struct; 545 user_datum_t **user_val_to_struct; 546 type_datum_t **type_val_to_struct; 547 548 /* module stuff section -- used in parsing and for modules */ 549 550 /* keep track of the scope for every identifier. these are 551 * hash tables, where the key is the identifier name and value 552 * a scope_datum_t. as a convenience, one may use the 553 * p_*_macros (cf. struct scope_index_t declaration). */ 554 symtab_t scope[SYM_NUM]; 555 556 /* module rule storage */ 557 avrule_block_t *global; 558 /* avrule_decl index used for link/expand */ 559 avrule_decl_t **decl_val_to_struct; 560 561 /* compiled storage of rules - use for the kernel policy */ 562 563 /* type enforcement access vectors and transitions */ 564 avtab_t te_avtab; 565 566 /* bools indexed by (value - 1) */ 567 cond_bool_datum_t **bool_val_to_struct; 568 /* type enforcement conditional access vectors and transitions */ 569 avtab_t te_cond_avtab; 570 /* linked list indexing te_cond_avtab by conditional */ 571 cond_list_t *cond_list; 572 573 /* role transitions */ 574 role_trans_t *role_tr; 575 576 /* role allows */ 577 role_allow_t *role_allow; 578 579 /* security contexts of initial SIDs, unlabeled file systems, 580 TCP or UDP port numbers, network interfaces and nodes */ 581 ocontext_t *ocontexts[OCON_NUM]; 582 583 /* security contexts for files in filesystems that cannot support 584 a persistent label mapping or use another 585 fixed labeling behavior. */ 586 genfs_t *genfs; 587 588 /* range transitions table (range_trans_key -> mls_range) */ 589 hashtab_t range_tr; 590 591 /* file transitions with the last path component */ 592 hashtab_t filename_trans; 593 594 ebitmap_t *type_attr_map; 595 596 ebitmap_t *attr_type_map; /* not saved in the binary policy */ 597 598 ebitmap_t policycaps; 599 600 /* this bitmap is referenced by type NOT the typical type-1 used in other 601 bitmaps. Someday the 0 bit may be used for global permissive */ 602 ebitmap_t permissive_map; 603 604 unsigned policyvers; 605 606 unsigned handle_unknown; 607 } policydb_t; 608 609 struct sepol_policydb { 610 struct policydb p; 611 }; 612 613 extern int policydb_init(policydb_t * p); 614 615 extern int policydb_from_image(sepol_handle_t * handle, 616 void *data, size_t len, policydb_t * policydb); 617 618 extern int policydb_to_image(sepol_handle_t * handle, 619 policydb_t * policydb, void **newdata, 620 size_t * newlen); 621 622 extern int policydb_index_classes(policydb_t * p); 623 624 extern int policydb_index_bools(policydb_t * p); 625 626 extern int policydb_index_others(sepol_handle_t * handle, policydb_t * p, 627 unsigned int verbose); 628 629 extern int policydb_role_cache(hashtab_key_t key, 630 hashtab_datum_t datum, 631 void *arg); 632 633 extern int policydb_user_cache(hashtab_key_t key, 634 hashtab_datum_t datum, 635 void *arg); 636 637 extern int policydb_reindex_users(policydb_t * p); 638 639 extern void policydb_destroy(policydb_t * p); 640 641 extern int policydb_load_isids(policydb_t * p, sidtab_t * s); 642 643 /* Deprecated */ 644 extern int policydb_context_isvalid(const policydb_t * p, 645 const context_struct_t * c); 646 647 extern void symtabs_destroy(symtab_t * symtab); 648 extern int scope_destroy(hashtab_key_t key, hashtab_datum_t datum, void *p); 649 typedef void (*hashtab_destroy_func_t) (hashtab_key_t k, hashtab_datum_t d, 650 void *args); 651 extern hashtab_destroy_func_t get_symtab_destroy_func(int sym_num); 652 653 extern void class_perm_node_init(class_perm_node_t * x); 654 extern void type_set_init(type_set_t * x); 655 extern void type_set_destroy(type_set_t * x); 656 extern int type_set_cpy(type_set_t * dst, type_set_t * src); 657 extern int type_set_or_eq(type_set_t * dst, type_set_t * other); 658 extern void role_set_init(role_set_t * x); 659 extern void role_set_destroy(role_set_t * x); 660 extern void avrule_init(avrule_t * x); 661 extern void avrule_destroy(avrule_t * x); 662 extern void avrule_list_destroy(avrule_t * x); 663 extern void role_trans_rule_init(role_trans_rule_t * x); 664 extern void role_trans_rule_list_destroy(role_trans_rule_t * x); 665 extern void filename_trans_rule_init(filename_trans_rule_t * x); 666 extern void filename_trans_rule_list_destroy(filename_trans_rule_t * x); 667 668 extern void role_datum_init(role_datum_t * x); 669 extern void role_datum_destroy(role_datum_t * x); 670 extern void role_allow_rule_init(role_allow_rule_t * x); 671 extern void role_allow_rule_destroy(role_allow_rule_t * x); 672 extern void role_allow_rule_list_destroy(role_allow_rule_t * x); 673 extern void range_trans_rule_init(range_trans_rule_t *x); 674 extern void range_trans_rule_destroy(range_trans_rule_t *x); 675 extern void range_trans_rule_list_destroy(range_trans_rule_t *x); 676 extern void type_datum_init(type_datum_t * x); 677 extern void type_datum_destroy(type_datum_t * x); 678 extern void user_datum_init(user_datum_t * x); 679 extern void user_datum_destroy(user_datum_t * x); 680 extern void level_datum_init(level_datum_t * x); 681 extern void level_datum_destroy(level_datum_t * x); 682 extern void cat_datum_init(cat_datum_t * x); 683 extern void cat_datum_destroy(cat_datum_t * x); 684 extern int check_assertion(policydb_t *p, avrule_t *avrule); 685 extern int check_assertions(sepol_handle_t * handle, 686 policydb_t * p, avrule_t * avrules); 687 688 extern int symtab_insert(policydb_t * x, uint32_t sym, 689 hashtab_key_t key, hashtab_datum_t datum, 690 uint32_t scope, uint32_t avrule_decl_id, 691 uint32_t * value); 692 693 /* A policy "file" may be a memory region referenced by a (data, len) pair 694 or a file referenced by a FILE pointer. */ 695 typedef struct policy_file { 696 #define PF_USE_MEMORY 0 697 #define PF_USE_STDIO 1 698 #define PF_LEN 2 /* total up length in len field */ 699 unsigned type; 700 char *data; 701 size_t len; 702 size_t size; 703 FILE *fp; 704 struct sepol_handle *handle; 705 } policy_file_t; 706 707 struct sepol_policy_file { 708 struct policy_file pf; 709 }; 710 711 extern void policy_file_init(policy_file_t * x); 712 713 extern int policydb_read(policydb_t * p, struct policy_file *fp, 714 unsigned int verbose); 715 extern int avrule_read_list(policydb_t * p, avrule_t ** avrules, 716 struct policy_file *fp); 717 718 extern int policydb_write(struct policydb *p, struct policy_file *pf); 719 extern int policydb_set_target_platform(policydb_t *p, int platform); 720 721 #define PERM_SYMTAB_SIZE 32 722 723 /* Identify specific policy version changes */ 724 #define POLICYDB_VERSION_BASE 15 725 #define POLICYDB_VERSION_BOOL 16 726 #define POLICYDB_VERSION_IPV6 17 727 #define POLICYDB_VERSION_NLCLASS 18 728 #define POLICYDB_VERSION_VALIDATETRANS 19 729 #define POLICYDB_VERSION_MLS 19 730 #define POLICYDB_VERSION_AVTAB 20 731 #define POLICYDB_VERSION_RANGETRANS 21 732 #define POLICYDB_VERSION_POLCAP 22 733 #define POLICYDB_VERSION_PERMISSIVE 23 734 #define POLICYDB_VERSION_BOUNDARY 24 735 #define POLICYDB_VERSION_FILENAME_TRANS 25 736 #define POLICYDB_VERSION_ROLETRANS 26 737 #define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27 738 #define POLICYDB_VERSION_DEFAULT_TYPE 28 739 #define POLICYDB_VERSION_CONSTRAINT_NAMES 29 740 #define POLICYDB_VERSION_XEN_DEVICETREE 30 /* Xen-specific */ 741 #define POLICYDB_VERSION_XPERMS_IOCTL 30 /* Linux-specific */ 742 #define POLICYDB_VERSION_INFINIBAND 31 /* Linux-specific */ 743 744 /* Range of policy versions we understand*/ 745 #define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 746 #define POLICYDB_VERSION_MAX POLICYDB_VERSION_INFINIBAND 747 748 /* Module versions and specific changes*/ 749 #define MOD_POLICYDB_VERSION_BASE 4 750 #define MOD_POLICYDB_VERSION_VALIDATETRANS 5 751 #define MOD_POLICYDB_VERSION_MLS 5 752 #define MOD_POLICYDB_VERSION_RANGETRANS 6 753 #define MOD_POLICYDB_VERSION_MLS_USERS 6 754 #define MOD_POLICYDB_VERSION_POLCAP 7 755 #define MOD_POLICYDB_VERSION_PERMISSIVE 8 756 #define MOD_POLICYDB_VERSION_BOUNDARY 9 757 #define MOD_POLICYDB_VERSION_BOUNDARY_ALIAS 10 758 #define MOD_POLICYDB_VERSION_FILENAME_TRANS 11 759 #define MOD_POLICYDB_VERSION_ROLETRANS 12 760 #define MOD_POLICYDB_VERSION_ROLEATTRIB 13 761 #define MOD_POLICYDB_VERSION_TUNABLE_SEP 14 762 #define MOD_POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 15 763 #define MOD_POLICYDB_VERSION_DEFAULT_TYPE 16 764 #define MOD_POLICYDB_VERSION_CONSTRAINT_NAMES 17 765 #define MOD_POLICYDB_VERSION_XPERMS_IOCTL 18 766 #define MOD_POLICYDB_VERSION_INFINIBAND 19 767 768 #define MOD_POLICYDB_VERSION_MIN MOD_POLICYDB_VERSION_BASE 769 #define MOD_POLICYDB_VERSION_MAX MOD_POLICYDB_VERSION_INFINIBAND 770 771 #define POLICYDB_CONFIG_MLS 1 772 773 /* macros to check policy feature */ 774 775 /* TODO: add other features here */ 776 777 #define policydb_has_boundary_feature(p) \ 778 (((p)->policy_type == POLICY_KERN \ 779 && p->policyvers >= POLICYDB_VERSION_BOUNDARY) || \ 780 ((p)->policy_type != POLICY_KERN \ 781 && p->policyvers >= MOD_POLICYDB_VERSION_BOUNDARY)) 782 783 /* the config flags related to unknown classes/perms are bits 2 and 3 */ 784 #define DENY_UNKNOWN SEPOL_DENY_UNKNOWN 785 #define REJECT_UNKNOWN SEPOL_REJECT_UNKNOWN 786 #define ALLOW_UNKNOWN SEPOL_ALLOW_UNKNOWN 787 788 #define POLICYDB_CONFIG_UNKNOWN_MASK (DENY_UNKNOWN | REJECT_UNKNOWN | ALLOW_UNKNOWN) 789 790 #define OBJECT_R "object_r" 791 #define OBJECT_R_VAL 1 792 793 #define POLICYDB_MAGIC SELINUX_MAGIC 794 #define POLICYDB_STRING "SE Linux" 795 #define POLICYDB_XEN_STRING "XenFlask" 796 #define POLICYDB_STRING_MAX_LENGTH 32 797 #define POLICYDB_MOD_MAGIC SELINUX_MOD_MAGIC 798 #define POLICYDB_MOD_STRING "SE Linux Module" 799 800 #ifdef __cplusplus 801 } 802 #endif 803 804 #endif /* _POLICYDB_H_ */ 805 806 /* FLASK */ 807
