xref: /aosp_15_r20/external/selinux/libsepol/include/sepol/policydb/expand.h (revision 2d543d20722ada2425b5bdab9d0d1d29470e7bba)

/* Authors: Jason Tang <[email protected]>
 *	    Joshua Brindle <[email protected]>
 *          Karl MacMillan <[email protected]>
 *
 * A set of utility functions that aid policy decision when dealing
 * with hierarchal items.
 *
 * Copyright (C) 2005 Tresys Technology, LLC
 *
 *  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
 */

#ifndef _SEPOL_POLICYDB_EXPAND_H
#define _SEPOL_POLICYDB_EXPAND_H

#include <stddef.h>
#include <sepol/handle.h>
#include <sepol/policydb/conditional.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * Expand only the avrules for a module. It is valid for this function
 * to expand base into itself (i.e.  base == out); the typemap for
 * this special case should map type[i] to i+1.  Likewise the boolmap
 * should map bool[i] to i + 1.  This function optionally expands
 * neverallow rules. If neverallow rules are expanded, there is no
 * need to copy them and doing so could cause duplicate entries when
 * base == out.  If the neverallow rules are not expanded, they are
 * just copied to the destination policy so that assertion checking
 * can be performed after expand.  No assertion or hierarchy checking
 * is performed by this function.
 */
extern int expand_module_avrules(sepol_handle_t * handle, policydb_t * base,
				 policydb_t * out, uint32_t * typemap, uint32_t * boolmap,
				 uint32_t * rolemap, uint32_t * usermap,
				 int verbose, int expand_neverallow);
/*
 * Expand all parts of a module. Neverallow rules are not expanded (only
 * copied). It is not valid to expand base into itself. If check is non-zero,
 * performs hierarchy and assertion checking.
 */
extern int expand_module(sepol_handle_t * handle,
			 policydb_t * base, policydb_t * out,
			 int verbose, int check);
extern int convert_type_ebitmap(ebitmap_t * src, ebitmap_t * dst,
				uint32_t * typemap);
extern int expand_convert_type_set(policydb_t * p, uint32_t * typemap,
				   type_set_t * set, ebitmap_t * types,
				   unsigned char alwaysexpand);
extern int type_set_expand(type_set_t * set, ebitmap_t * t, policydb_t * p,
			   unsigned char alwaysexpand);
extern int role_set_expand(role_set_t * x, ebitmap_t * r, policydb_t * out, policydb_t * base, uint32_t * rolemap);
extern int mls_semantic_level_expand(mls_semantic_level_t *sl, mls_level_t *l,
                                     policydb_t *p, sepol_handle_t *h);
extern int mls_semantic_range_expand(mls_semantic_range_t *sr, mls_range_t *r,
                                     policydb_t *p, sepol_handle_t *h);
extern int expand_rule(sepol_handle_t * handle,
		       policydb_t * source_pol,
		       avrule_t * source_rule, avtab_t * dest_avtab,
		       cond_av_list_t ** cond, cond_av_list_t ** other,
		       int enabled);

extern int expand_avtab(policydb_t * p, avtab_t * a, avtab_t * expa);

extern int expand_cond_av_list(policydb_t * p, cond_av_list_t * l,
			       cond_av_list_t ** newl, avtab_t * expa);

#ifdef __cplusplus
}
#endif

#endif