policydb.h revision 8fd7c65a336d45d5225f32363a9f26c1e3e60c3c
1 2/* Author : Stephen Smalley, <sds@epoch.ncsc.mil> */ 3 4/* 5 * Updated: Joshua Brindle <jbrindle@tresys.com> 6 * Karl MacMillan <kmacmillan@tresys.com> 7 * Jason Tang <jtang@tresys.com> 8 * 9 * Module support 10 * 11 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> 12 * 13 * Support for enhanced MLS infrastructure. 14 * 15 * Updated: Frank Mayer <mayerf@tresys.com> and Karl MacMillan <kmacmillan@tresys.com> 16 * 17 * Added conditional policy language extensions 18 * 19 * Updated: Red Hat, Inc. James Morris <jmorris@redhat.com> 20 * 21 * Fine-grained netlink support 22 * IPv6 support 23 * Code cleanup 24 * 25 * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc. 26 * Copyright (C) 2003 - 2004 Tresys Technology, LLC 27 * Copyright (C) 2003 - 2004 Red Hat, 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/* 73 * A datum type is defined for each kind of symbol 74 * in the configuration data: individual permissions, 75 * common prefixes for access vectors, classes, 76 * users, roles, types, sensitivities, categories, etc. 77 */ 78 79/* type set preserves data needed by modules such as *, ~ and attributes */ 80typedef struct type_set { 81 ebitmap_t types; 82 ebitmap_t negset; 83#define TYPE_STAR 1 84#define TYPE_COMP 2 85 uint32_t flags; 86} type_set_t; 87 88typedef struct role_set { 89 ebitmap_t roles; 90#define ROLE_STAR 1 91#define ROLE_COMP 2 92 uint32_t flags; 93} role_set_t; 94 95/* Permission attributes */ 96typedef struct perm_datum { 97 symtab_datum_t s; 98} perm_datum_t; 99 100/* Attributes of a common prefix for access vectors */ 101typedef struct common_datum { 102 symtab_datum_t s; 103 symtab_t permissions; /* common permissions */ 104} common_datum_t; 105 106/* Class attributes */ 107typedef struct class_datum { 108 symtab_datum_t s; 109 char *comkey; /* common name */ 110 common_datum_t *comdatum; /* common datum */ 111 symtab_t permissions; /* class-specific permission symbol table */ 112 constraint_node_t *constraints; /* constraints on class permissions */ 113 constraint_node_t *validatetrans; /* special transition rules */ 114/* Options how a new object user and role should be decided */ 115#define DEFAULT_SOURCE 1 116#define DEFAULT_TARGET 2 117 char default_user; 118 char default_role; 119 char default_type; 120/* Options how a new object range should be decided */ 121#define DEFAULT_SOURCE_LOW 1 122#define DEFAULT_SOURCE_HIGH 2 123#define DEFAULT_SOURCE_LOW_HIGH 3 124#define DEFAULT_TARGET_LOW 4 125#define DEFAULT_TARGET_HIGH 5 126#define DEFAULT_TARGET_LOW_HIGH 6 127 char default_range; 128} class_datum_t; 129 130/* Role attributes */ 131typedef struct role_datum { 132 symtab_datum_t s; 133 ebitmap_t dominates; /* set of roles dominated by this role */ 134 type_set_t types; /* set of authorized types for role */ 135 ebitmap_t cache; /* This is an expanded set used for context validation during parsing */ 136 uint32_t bounds; /* bounds role, if exist */ 137#define ROLE_ROLE 0 /* regular role in kernel policies */ 138#define ROLE_ATTRIB 1 /* attribute */ 139 uint32_t flavor; 140 ebitmap_t roles; /* roles with this attribute */ 141} role_datum_t; 142 143typedef struct role_trans { 144 uint32_t role; /* current role */ 145 uint32_t type; /* program executable type, or new object type */ 146 uint32_t tclass; /* process class, or new object class */ 147 uint32_t new_role; /* new role */ 148 struct role_trans *next; 149} role_trans_t; 150 151typedef struct role_allow { 152 uint32_t role; /* current role */ 153 uint32_t new_role; /* new role */ 154 struct role_allow *next; 155} role_allow_t; 156 157/* filename_trans rules */ 158typedef struct filename_trans { 159 uint32_t stype; 160 uint32_t ttype; 161 uint32_t tclass; 162 char *name; 163 uint32_t otype; 164 struct filename_trans *next; 165} filename_trans_t; 166 167/* Type attributes */ 168typedef struct type_datum { 169 symtab_datum_t s; 170 uint32_t primary; /* primary name? can be set to primary value if below is TYPE_ */ 171#define TYPE_TYPE 0 /* regular type or alias in kernel policies */ 172#define TYPE_ATTRIB 1 /* attribute */ 173#define TYPE_ALIAS 2 /* alias in modular policy */ 174 uint32_t flavor; 175 ebitmap_t types; /* types with this attribute */ 176#define TYPE_FLAGS_PERMISSIVE 0x01 177 uint32_t flags; 178 uint32_t bounds; /* bounds type, if exist */ 179} type_datum_t; 180 181/* 182 * Properties of type_datum 183 * available on the policy version >= (MOD_)POLICYDB_VERSION_BOUNDARY 184 */ 185#define TYPEDATUM_PROPERTY_PRIMARY 0x0001 186#define TYPEDATUM_PROPERTY_ATTRIBUTE 0x0002 187#define TYPEDATUM_PROPERTY_ALIAS 0x0004 /* userspace only */ 188#define TYPEDATUM_PROPERTY_PERMISSIVE 0x0008 /* userspace only */ 189 190/* User attributes */ 191typedef struct user_datum { 192 symtab_datum_t s; 193 role_set_t roles; /* set of authorized roles for user */ 194 mls_semantic_range_t range; /* MLS range (min. - max.) for user */ 195 mls_semantic_level_t dfltlevel; /* default login MLS level for user */ 196 ebitmap_t cache; /* This is an expanded set used for context validation during parsing */ 197 mls_range_t exp_range; /* expanded range used for validation */ 198 mls_level_t exp_dfltlevel; /* expanded range used for validation */ 199 uint32_t bounds; /* bounds user, if exist */ 200} user_datum_t; 201 202/* Sensitivity attributes */ 203typedef struct level_datum { 204 mls_level_t *level; /* sensitivity and associated categories */ 205 unsigned char isalias; /* is this sensitivity an alias for another? */ 206 unsigned char defined; 207} level_datum_t; 208 209/* Category attributes */ 210typedef struct cat_datum { 211 symtab_datum_t s; 212 unsigned char isalias; /* is this category an alias for another? */ 213} cat_datum_t; 214 215typedef struct range_trans { 216 uint32_t source_type; 217 uint32_t target_type; 218 uint32_t target_class; 219 mls_range_t target_range; 220 struct range_trans *next; 221} range_trans_t; 222 223/* Boolean data type */ 224typedef struct cond_bool_datum { 225 symtab_datum_t s; 226 int state; 227#define COND_BOOL_FLAGS_TUNABLE 0x01 /* is this a tunable? */ 228 uint32_t flags; 229} cond_bool_datum_t; 230 231struct cond_node; 232 233typedef struct cond_node cond_list_t; 234struct cond_av_list; 235 236typedef struct class_perm_node { 237 uint32_t class; 238 uint32_t data; /* permissions or new type */ 239 struct class_perm_node *next; 240} class_perm_node_t; 241 242typedef struct avrule { 243/* these typedefs are almost exactly the same as those in avtab.h - they are 244 * here because of the need to include neverallow and dontaudit messages */ 245#define AVRULE_ALLOWED 1 246#define AVRULE_AUDITALLOW 2 247#define AVRULE_AUDITDENY 4 248#define AVRULE_DONTAUDIT 8 249#define AVRULE_NEVERALLOW 128 250#define AVRULE_AV (AVRULE_ALLOWED | AVRULE_AUDITALLOW | AVRULE_AUDITDENY | AVRULE_DONTAUDIT | AVRULE_NEVERALLOW) 251#define AVRULE_TRANSITION 16 252#define AVRULE_MEMBER 32 253#define AVRULE_CHANGE 64 254#define AVRULE_TYPE (AVRULE_TRANSITION | AVRULE_MEMBER | AVRULE_CHANGE) 255 uint32_t specified; 256#define RULE_SELF 1 257 uint32_t flags; 258 type_set_t stypes; 259 type_set_t ttypes; 260 class_perm_node_t *perms; 261 unsigned long line; /* line number from policy.conf where 262 * this rule originated */ 263 struct avrule *next; 264} avrule_t; 265 266typedef struct role_trans_rule { 267 role_set_t roles; /* current role */ 268 type_set_t types; /* program executable type, or new object type */ 269 ebitmap_t classes; /* process class, or new object class */ 270 uint32_t new_role; /* new role */ 271 struct role_trans_rule *next; 272} role_trans_rule_t; 273 274typedef struct role_allow_rule { 275 role_set_t roles; /* current role */ 276 role_set_t new_roles; /* new roles */ 277 struct role_allow_rule *next; 278} role_allow_rule_t; 279 280typedef struct filename_trans_rule { 281 type_set_t stypes; 282 type_set_t ttypes; 283 uint32_t tclass; 284 char *name; 285 uint32_t otype; /* new type */ 286 struct filename_trans_rule *next; 287} filename_trans_rule_t; 288 289typedef struct range_trans_rule { 290 type_set_t stypes; 291 type_set_t ttypes; 292 ebitmap_t tclasses; 293 mls_semantic_range_t trange; 294 struct range_trans_rule *next; 295} range_trans_rule_t; 296 297/* 298 * The configuration data includes security contexts for 299 * initial SIDs, unlabeled file systems, TCP and UDP port numbers, 300 * network interfaces, and nodes. This structure stores the 301 * relevant data for one such entry. Entries of the same kind 302 * (e.g. all initial SIDs) are linked together into a list. 303 */ 304typedef struct ocontext { 305 union { 306 char *name; /* name of initial SID, fs, netif, fstype, path */ 307 struct { 308 uint8_t protocol; 309 uint16_t low_port; 310 uint16_t high_port; 311 } port; /* TCP or UDP port information */ 312 struct { 313 uint32_t addr; /* network order */ 314 uint32_t mask; /* network order */ 315 } node; /* node information */ 316 struct { 317 uint32_t addr[4]; /* network order */ 318 uint32_t mask[4]; /* network order */ 319 } node6; /* IPv6 node information */ 320 uint32_t device; 321 uint16_t pirq; 322 struct { 323 uint32_t low_iomem; 324 uint32_t high_iomem; 325 } iomem; 326 struct { 327 uint32_t low_ioport; 328 uint32_t high_ioport; 329 } ioport; 330 } u; 331 union { 332 uint32_t sclass; /* security class for genfs */ 333 uint32_t behavior; /* labeling behavior for fs_use */ 334 } v; 335 context_struct_t context[2]; /* security context(s) */ 336 sepol_security_id_t sid[2]; /* SID(s) */ 337 struct ocontext *next; 338} ocontext_t; 339 340typedef struct genfs { 341 char *fstype; 342 struct ocontext *head; 343 struct genfs *next; 344} genfs_t; 345 346/* symbol table array indices */ 347#define SYM_COMMONS 0 348#define SYM_CLASSES 1 349#define SYM_ROLES 2 350#define SYM_TYPES 3 351#define SYM_USERS 4 352#define SYM_BOOLS 5 353#define SYM_LEVELS 6 354#define SYM_CATS 7 355#define SYM_NUM 8 356 357/* object context array indices */ 358#define OCON_ISID 0 /* initial SIDs */ 359#define OCON_FS 1 /* unlabeled file systems */ 360#define OCON_PORT 2 /* TCP and UDP port numbers */ 361#define OCON_NETIF 3 /* network interfaces */ 362#define OCON_NODE 4 /* nodes */ 363#define OCON_FSUSE 5 /* fs_use */ 364#define OCON_NODE6 6 /* IPv6 nodes */ 365#define OCON_GENFS 7 /* needed for ocontext_supported */ 366 367/* object context array indices for Xen */ 368#define OCON_XEN_ISID 0 /* initial SIDs */ 369#define OCON_XEN_PIRQ 1 /* physical irqs */ 370#define OCON_XEN_IOPORT 2 /* io ports */ 371#define OCON_XEN_IOMEM 3 /* io memory */ 372#define OCON_XEN_PCIDEVICE 4 /* pci devices */ 373 374/* OCON_NUM needs to be the largest index in any platform's ocontext array */ 375#define OCON_NUM 7 376 377/* section: module information */ 378 379/* scope_index_t holds all of the symbols that are in scope in a 380 * particular situation. The bitmaps are indices (and thus must 381 * subtract one) into the global policydb->scope array. */ 382typedef struct scope_index { 383 ebitmap_t scope[SYM_NUM]; 384#define p_classes_scope scope[SYM_CLASSES] 385#define p_roles_scope scope[SYM_ROLES] 386#define p_types_scope scope[SYM_TYPES] 387#define p_users_scope scope[SYM_USERS] 388#define p_bools_scope scope[SYM_BOOLS] 389#define p_sens_scope scope[SYM_LEVELS] 390#define p_cat_scope scope[SYM_CATS] 391 392 /* this array maps from class->value to the permissions within 393 * scope. if bit (perm->value - 1) is set in map 394 * class_perms_map[class->value - 1] then that permission is 395 * enabled for this class within this decl. */ 396 ebitmap_t *class_perms_map; 397 /* total number of classes in class_perms_map array */ 398 uint32_t class_perms_len; 399} scope_index_t; 400 401/* a list of declarations for a particular avrule_decl */ 402 403/* These two structs declare a block of policy that has TE and RBAC 404 * statements and declarations. The root block (the global policy) 405 * can never have an ELSE branch. */ 406typedef struct avrule_decl { 407 uint32_t decl_id; 408 uint32_t enabled; /* whether this block is enabled */ 409 410 cond_list_t *cond_list; 411 avrule_t *avrules; 412 role_trans_rule_t *role_tr_rules; 413 role_allow_rule_t *role_allow_rules; 414 range_trans_rule_t *range_tr_rules; 415 scope_index_t required; /* symbols needed to activate this block */ 416 scope_index_t declared; /* symbols declared within this block */ 417 418 /* type transition rules with a 'name' component */ 419 filename_trans_rule_t *filename_trans_rules; 420 421 /* for additive statements (type attribute, roles, and users) */ 422 symtab_t symtab[SYM_NUM]; 423 424 /* In a linked module this will contain the name of the module 425 * from which this avrule_decl originated. */ 426 char *module_name; 427 428 struct avrule_decl *next; 429} avrule_decl_t; 430 431typedef struct avrule_block { 432 avrule_decl_t *branch_list; 433 avrule_decl_t *enabled; /* pointer to which branch is enabled. this is 434 used in linking and never written to disk */ 435#define AVRULE_OPTIONAL 1 436 uint32_t flags; /* any flags for this block, currently just optional */ 437 struct avrule_block *next; 438} avrule_block_t; 439 440/* Every identifier has its own scope datum. The datum describes if 441 * the item is to be included into the final policy during 442 * expansion. */ 443typedef struct scope_datum { 444/* Required for this decl */ 445#define SCOPE_REQ 1 446/* Declared in this decl */ 447#define SCOPE_DECL 2 448 uint32_t scope; 449 uint32_t *decl_ids; 450 uint32_t decl_ids_len; 451 /* decl_ids is a list of avrule_decl's that declare/require 452 * this symbol. If scope==SCOPE_DECL then this is a list of 453 * declarations. If the symbol may only be declared once 454 * (types, bools) then decl_ids_len will be exactly 1. For 455 * implicitly declared things (roles, users) then decl_ids_len 456 * will be at least 1. */ 457} scope_datum_t; 458 459/* The policy database */ 460typedef struct policydb { 461#define POLICY_KERN SEPOL_POLICY_KERN 462#define POLICY_BASE SEPOL_POLICY_BASE 463#define POLICY_MOD SEPOL_POLICY_MOD 464 uint32_t policy_type; 465 char *name; 466 char *version; 467 int target_platform; 468 469 /* Set when the policydb is modified such that writing is unsupported */ 470 int unsupported_format; 471 472 /* Whether this policydb is mls, should always be set */ 473 int mls; 474 475 /* symbol tables */ 476 symtab_t symtab[SYM_NUM]; 477#define p_commons symtab[SYM_COMMONS] 478#define p_classes symtab[SYM_CLASSES] 479#define p_roles symtab[SYM_ROLES] 480#define p_types symtab[SYM_TYPES] 481#define p_users symtab[SYM_USERS] 482#define p_bools symtab[SYM_BOOLS] 483#define p_levels symtab[SYM_LEVELS] 484#define p_cats symtab[SYM_CATS] 485 486 /* symbol names indexed by (value - 1) */ 487 char **sym_val_to_name[SYM_NUM]; 488#define p_common_val_to_name sym_val_to_name[SYM_COMMONS] 489#define p_class_val_to_name sym_val_to_name[SYM_CLASSES] 490#define p_role_val_to_name sym_val_to_name[SYM_ROLES] 491#define p_type_val_to_name sym_val_to_name[SYM_TYPES] 492#define p_user_val_to_name sym_val_to_name[SYM_USERS] 493#define p_bool_val_to_name sym_val_to_name[SYM_BOOLS] 494#define p_sens_val_to_name sym_val_to_name[SYM_LEVELS] 495#define p_cat_val_to_name sym_val_to_name[SYM_CATS] 496 497 /* class, role, and user attributes indexed by (value - 1) */ 498 class_datum_t **class_val_to_struct; 499 role_datum_t **role_val_to_struct; 500 user_datum_t **user_val_to_struct; 501 type_datum_t **type_val_to_struct; 502 503 /* module stuff section -- used in parsing and for modules */ 504 505 /* keep track of the scope for every identifier. these are 506 * hash tables, where the key is the identifier name and value 507 * a scope_datum_t. as a convenience, one may use the 508 * p_*_macros (cf. struct scope_index_t declaration). */ 509 symtab_t scope[SYM_NUM]; 510 511 /* module rule storage */ 512 avrule_block_t *global; 513 /* avrule_decl index used for link/expand */ 514 avrule_decl_t **decl_val_to_struct; 515 516 /* compiled storage of rules - use for the kernel policy */ 517 518 /* type enforcement access vectors and transitions */ 519 avtab_t te_avtab; 520 521 /* bools indexed by (value - 1) */ 522 cond_bool_datum_t **bool_val_to_struct; 523 /* type enforcement conditional access vectors and transitions */ 524 avtab_t te_cond_avtab; 525 /* linked list indexing te_cond_avtab by conditional */ 526 cond_list_t *cond_list; 527 528 /* role transitions */ 529 role_trans_t *role_tr; 530 531 /* type transition rules with a 'name' component */ 532 filename_trans_t *filename_trans; 533 534 /* role allows */ 535 role_allow_t *role_allow; 536 537 /* security contexts of initial SIDs, unlabeled file systems, 538 TCP or UDP port numbers, network interfaces and nodes */ 539 ocontext_t *ocontexts[OCON_NUM]; 540 541 /* security contexts for files in filesystems that cannot support 542 a persistent label mapping or use another 543 fixed labeling behavior. */ 544 genfs_t *genfs; 545 546 /* range transitions */ 547 range_trans_t *range_tr; 548 549 ebitmap_t *type_attr_map; 550 551 ebitmap_t *attr_type_map; /* not saved in the binary policy */ 552 553 ebitmap_t policycaps; 554 555 /* this bitmap is referenced by type NOT the typical type-1 used in other 556 bitmaps. Someday the 0 bit may be used for global permissive */ 557 ebitmap_t permissive_map; 558 559 unsigned policyvers; 560 561 unsigned handle_unknown; 562} policydb_t; 563 564struct sepol_policydb { 565 struct policydb p; 566}; 567 568extern int policydb_init(policydb_t * p); 569 570extern int policydb_from_image(sepol_handle_t * handle, 571 void *data, size_t len, policydb_t * policydb); 572 573extern int policydb_to_image(sepol_handle_t * handle, 574 policydb_t * policydb, void **newdata, 575 size_t * newlen); 576 577extern int policydb_index_classes(policydb_t * p); 578 579extern int policydb_index_bools(policydb_t * p); 580 581extern int policydb_index_others(sepol_handle_t * handle, policydb_t * p, 582 unsigned int verbose); 583 584extern int policydb_reindex_users(policydb_t * p); 585 586extern void policydb_destroy(policydb_t * p); 587 588extern int policydb_load_isids(policydb_t * p, sidtab_t * s); 589 590/* Deprecated */ 591extern int policydb_context_isvalid(const policydb_t * p, 592 const context_struct_t * c); 593 594extern void symtabs_destroy(symtab_t * symtab); 595extern int scope_destroy(hashtab_key_t key, hashtab_datum_t datum, void *p); 596typedef void (*hashtab_destroy_func_t) (hashtab_key_t k, hashtab_datum_t d, 597 void *args); 598extern hashtab_destroy_func_t get_symtab_destroy_func(int sym_num); 599 600extern void class_perm_node_init(class_perm_node_t * x); 601extern void type_set_init(type_set_t * x); 602extern void type_set_destroy(type_set_t * x); 603extern int type_set_cpy(type_set_t * dst, type_set_t * src); 604extern int type_set_or_eq(type_set_t * dst, type_set_t * other); 605extern void role_set_init(role_set_t * x); 606extern void role_set_destroy(role_set_t * x); 607extern void avrule_init(avrule_t * x); 608extern void avrule_destroy(avrule_t * x); 609extern void avrule_list_destroy(avrule_t * x); 610extern void role_trans_rule_init(role_trans_rule_t * x); 611extern void role_trans_rule_list_destroy(role_trans_rule_t * x); 612extern void filename_trans_rule_init(filename_trans_rule_t * x); 613extern void filename_trans_rule_list_destroy(filename_trans_rule_t * x); 614 615extern void role_datum_init(role_datum_t * x); 616extern void role_datum_destroy(role_datum_t * x); 617extern void role_allow_rule_init(role_allow_rule_t * x); 618extern void role_allow_rule_destroy(role_allow_rule_t * x); 619extern void role_allow_rule_list_destroy(role_allow_rule_t * x); 620extern void range_trans_rule_init(range_trans_rule_t *x); 621extern void range_trans_rule_destroy(range_trans_rule_t *x); 622extern void range_trans_rule_list_destroy(range_trans_rule_t *x); 623extern void type_datum_init(type_datum_t * x); 624extern void type_datum_destroy(type_datum_t * x); 625extern void user_datum_init(user_datum_t * x); 626extern void user_datum_destroy(user_datum_t * x); 627extern void level_datum_init(level_datum_t * x); 628extern void level_datum_destroy(level_datum_t * x); 629extern void cat_datum_init(cat_datum_t * x); 630extern void cat_datum_destroy(cat_datum_t * x); 631 632extern int check_assertions(sepol_handle_t * handle, 633 policydb_t * p, avrule_t * avrules); 634 635extern int symtab_insert(policydb_t * x, uint32_t sym, 636 hashtab_key_t key, hashtab_datum_t datum, 637 uint32_t scope, uint32_t avrule_decl_id, 638 uint32_t * value); 639 640/* A policy "file" may be a memory region referenced by a (data, len) pair 641 or a file referenced by a FILE pointer. */ 642typedef struct policy_file { 643#define PF_USE_MEMORY 0 644#define PF_USE_STDIO 1 645#define PF_LEN 2 /* total up length in len field */ 646 unsigned type; 647 char *data; 648 size_t len; 649 size_t size; 650 FILE *fp; 651 struct sepol_handle *handle; 652} policy_file_t; 653 654struct sepol_policy_file { 655 struct policy_file pf; 656}; 657 658extern void policy_file_init(policy_file_t * x); 659 660extern int policydb_read(policydb_t * p, struct policy_file *fp, 661 unsigned int verbose); 662extern int avrule_read_list(policydb_t * p, avrule_t ** avrules, 663 struct policy_file *fp); 664 665extern int policydb_write(struct policydb *p, struct policy_file *pf); 666extern int policydb_set_target_platform(policydb_t *p, int platform); 667 668#define PERM_SYMTAB_SIZE 32 669 670/* Identify specific policy version changes */ 671#define POLICYDB_VERSION_BASE 15 672#define POLICYDB_VERSION_BOOL 16 673#define POLICYDB_VERSION_IPV6 17 674#define POLICYDB_VERSION_NLCLASS 18 675#define POLICYDB_VERSION_VALIDATETRANS 19 676#define POLICYDB_VERSION_MLS 19 677#define POLICYDB_VERSION_AVTAB 20 678#define POLICYDB_VERSION_RANGETRANS 21 679#define POLICYDB_VERSION_POLCAP 22 680#define POLICYDB_VERSION_PERMISSIVE 23 681#define POLICYDB_VERSION_BOUNDARY 24 682#define POLICYDB_VERSION_FILENAME_TRANS 25 683#define POLICYDB_VERSION_ROLETRANS 26 684#define POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 27 685#define POLICYDB_VERSION_DEFAULT_TYPE 28 686#define POLICYDB_VERSION_CONSTRAINT_NAMES 29 687 688/* Range of policy versions we understand*/ 689#define POLICYDB_VERSION_MIN POLICYDB_VERSION_BASE 690#define POLICYDB_VERSION_MAX POLICYDB_VERSION_CONSTRAINT_NAMES 691 692/* Module versions and specific changes*/ 693#define MOD_POLICYDB_VERSION_BASE 4 694#define MOD_POLICYDB_VERSION_VALIDATETRANS 5 695#define MOD_POLICYDB_VERSION_MLS 5 696#define MOD_POLICYDB_VERSION_RANGETRANS 6 697#define MOD_POLICYDB_VERSION_MLS_USERS 6 698#define MOD_POLICYDB_VERSION_POLCAP 7 699#define MOD_POLICYDB_VERSION_PERMISSIVE 8 700#define MOD_POLICYDB_VERSION_BOUNDARY 9 701#define MOD_POLICYDB_VERSION_BOUNDARY_ALIAS 10 702#define MOD_POLICYDB_VERSION_FILENAME_TRANS 11 703#define MOD_POLICYDB_VERSION_ROLETRANS 12 704#define MOD_POLICYDB_VERSION_ROLEATTRIB 13 705#define MOD_POLICYDB_VERSION_TUNABLE_SEP 14 706#define MOD_POLICYDB_VERSION_NEW_OBJECT_DEFAULTS 15 707#define MOD_POLICYDB_VERSION_DEFAULT_TYPE 16 708#define MOD_POLICYDB_VERSION_CONSTRAINT_NAMES 17 709 710#define MOD_POLICYDB_VERSION_MIN MOD_POLICYDB_VERSION_BASE 711#define MOD_POLICYDB_VERSION_MAX MOD_POLICYDB_VERSION_CONSTRAINT_NAMES 712 713#define POLICYDB_CONFIG_MLS 1 714 715/* macros to check policy feature */ 716 717/* TODO: add other features here */ 718 719#define policydb_has_boundary_feature(p) \ 720 (((p)->policy_type == POLICY_KERN \ 721 && p->policyvers >= POLICYDB_VERSION_BOUNDARY) || \ 722 ((p)->policy_type != POLICY_KERN \ 723 && p->policyvers >= MOD_POLICYDB_VERSION_BOUNDARY)) 724 725/* the config flags related to unknown classes/perms are bits 2 and 3 */ 726#define DENY_UNKNOWN SEPOL_DENY_UNKNOWN 727#define REJECT_UNKNOWN SEPOL_REJECT_UNKNOWN 728#define ALLOW_UNKNOWN SEPOL_ALLOW_UNKNOWN 729 730#define POLICYDB_CONFIG_UNKNOWN_MASK (DENY_UNKNOWN | REJECT_UNKNOWN | ALLOW_UNKNOWN) 731 732#define OBJECT_R "object_r" 733#define OBJECT_R_VAL 1 734 735#define POLICYDB_MAGIC SELINUX_MAGIC 736#define POLICYDB_STRING "SE Linux" 737#define POLICYDB_XEN_STRING "XenFlask" 738#define POLICYDB_STRING_MAX_LENGTH 32 739#define POLICYDB_MOD_MAGIC SELINUX_MOD_MAGIC 740#define POLICYDB_MOD_STRING "SE Linux Module" 741#define SEPOL_TARGET_SELINUX 0 742#define SEPOL_TARGET_XEN 1 743 744 745#endif /* _POLICYDB_H_ */ 746 747/* FLASK */ 748