/* Author : Stephen Smalley, <stephen.smalley.work@gmail.com> */ /* * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com> * * Support for enhanced MLS infrastructure. * * Copyright (C) 2004-2005 Trusted Computer Solutions, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ /* FLASK */ /* * Type definitions for the multi-level security (MLS) policy. */ #ifndef _SEPOL_POLICYDB_MLS_TYPES_H_ #define _SEPOL_POLICYDB_MLS_TYPES_H_ #include <errno.h> #include <stdint.h> #include <stdlib.h> #include <sys/param.h> #include <sepol/policydb/ebitmap.h> #include <sepol/policydb/flask_types.h> #ifdef __cplusplus extern "C" { #endif typedef struct mls_level { uint32_t sens; /* sensitivity */ ebitmap_t cat; /* category set */ } mls_level_t; typedef struct mls_range { mls_level_t level[2]; /* low == level[0], high == level[1] */ } mls_range_t; static inline int mls_range_glblub(struct mls_range *dst, const struct mls_range *r1, const struct mls_range *r2) { if (r1->level[1].sens < r2->level[0].sens || r2->level[1].sens < r1->level[0].sens) { /* These ranges have no common sensitivities */ return -EINVAL; } /* Take the greatest of the low */ dst->level[0].sens = MAX(r1->level[0].sens, r2->level[0].sens); /* Take the least of the high */ dst->level[1].sens = MIN(r1->level[1].sens, r2->level[1].sens); if (ebitmap_and(&dst->level[0].cat, &r1->level[0].cat, &r2->level[0].cat) < 0) { return -1; } if (ebitmap_and(&dst->level[1].cat, &r1->level[1].cat, &r2->level[1].cat) < 0) { return -1; } return 0; } static inline int mls_level_cpy(struct mls_level *dst, const struct mls_level *src) { dst->sens = src->sens; if (ebitmap_cpy(&dst->cat, &src->cat) < 0) return -1; return 0; } static inline void mls_level_init(struct mls_level *level) { memset(level, 0, sizeof(mls_level_t)); } static inline void mls_level_destroy(struct mls_level *level) { if (level == NULL) return; ebitmap_destroy(&level->cat); mls_level_init(level); } static inline int mls_level_eq(const struct mls_level *l1, const struct mls_level *l2) { return ((l1->sens == l2->sens) && ebitmap_cmp(&l1->cat, &l2->cat)); } static inline int mls_level_dom(const struct mls_level *l1, const struct mls_level *l2) { return ((l1->sens >= l2->sens) && ebitmap_contains(&l1->cat, &l2->cat)); } #define mls_level_incomp(l1, l2) \ (!mls_level_dom((l1), (l2)) && !mls_level_dom((l2), (l1))) #define mls_level_between(l1, l2, l3) \ (mls_level_dom((l1), (l2)) && mls_level_dom((l3), (l1))) #define mls_range_contains(r1, r2) \ (mls_level_dom(&(r2).level[0], &(r1).level[0]) && \ mls_level_dom(&(r1).level[1], &(r2).level[1])) static inline int mls_range_cpy(mls_range_t * dst, const mls_range_t * src) { if (mls_level_cpy(&dst->level[0], &src->level[0]) < 0) goto err; if (mls_level_cpy(&dst->level[1], &src->level[1]) < 0) goto err_destroy; return 0; err_destroy: mls_level_destroy(&dst->level[0]); err: return -1; } static inline void mls_range_init(struct mls_range *r) { mls_level_init(&r->level[0]); mls_level_init(&r->level[1]); } static inline void mls_range_destroy(struct mls_range *r) { mls_level_destroy(&r->level[0]); mls_level_destroy(&r->level[1]); } static inline int mls_range_eq(const struct mls_range *r1, const struct mls_range *r2) { return (mls_level_eq(&r1->level[0], &r2->level[0]) && mls_level_eq(&r1->level[1], &r2->level[1])); } typedef struct mls_semantic_cat { uint32_t low; /* first bit this struct represents */ uint32_t high; /* last bit represented - equals low for a single cat */ struct mls_semantic_cat *next; } mls_semantic_cat_t; typedef struct mls_semantic_level { uint32_t sens; mls_semantic_cat_t *cat; } mls_semantic_level_t; typedef struct mls_semantic_range { mls_semantic_level_t level[2]; } mls_semantic_range_t; extern void mls_semantic_cat_init(mls_semantic_cat_t *c); extern void mls_semantic_cat_destroy(mls_semantic_cat_t *c); extern void mls_semantic_level_init(mls_semantic_level_t *l); extern void mls_semantic_level_destroy(mls_semantic_level_t *l); extern int mls_semantic_level_cpy(mls_semantic_level_t *dst, const mls_semantic_level_t *src); extern void mls_semantic_range_init(mls_semantic_range_t *r); extern void mls_semantic_range_destroy(mls_semantic_range_t *r); extern int mls_semantic_range_cpy(mls_semantic_range_t *dst, const mls_semantic_range_t *src); #ifdef __cplusplus } #endif #endif SIMPAN PERUBAHAN