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/ usr / include / sepol / policydb /

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context.h

/* Author : Stephen Smalley, <stephen.smalley.work@gmail.com> */

/* FLASK */

/*
 * A security context is a set of security attributes
 * associated with each subject and object controlled
 * by the security policy.  Security contexts are
 * externally represented as variable-length strings
 * that can be interpreted by a user or application
 * with an understanding of the security policy. 
 * Internally, the security server uses a simple
 * structure.  This structure is private to the
 * security server and can be changed without affecting
 * clients of the security server.
 */

#ifndef _SEPOL_POLICYDB_CONTEXT_H_
#define _SEPOL_POLICYDB_CONTEXT_H_

#include <stddef.h>
#include <sepol/policydb/ebitmap.h>
#include <sepol/policydb/mls_types.h>

#ifdef __cplusplus
extern "C" {
#endif

/*
 * A security context consists of an authenticated user
 * identity, a role, a type and a MLS range.
 */
typedef struct context_struct {
	uint32_t user;
	uint32_t role;
	uint32_t type;
	mls_range_t range;
} context_struct_t;

static inline void mls_context_init(context_struct_t * c)
{
	mls_range_init(&c->range);
}

static inline int mls_context_cpy(context_struct_t * dst,
				  const context_struct_t * src)
{

if (mls_range_cpy(&dst->range, &src->range) < 0)
		return -1;

return 0;
}

/*
 * Sets both levels in the MLS range of 'dst' to the low level of 'src'.
 */
static inline int mls_context_cpy_low(context_struct_t *dst, const context_struct_t *src)
{
	int rc;

dst->range.level[0].sens = src->range.level[0].sens;
	rc = ebitmap_cpy(&dst->range.level[0].cat, &src->range.level[0].cat);
	if (rc)
		goto out;

dst->range.level[1].sens = src->range.level[0].sens;
	rc = ebitmap_cpy(&dst->range.level[1].cat, &src->range.level[0].cat);
	if (rc)
		ebitmap_destroy(&dst->range.level[0].cat);
out:
	return rc;
}

/*
 * Sets both levels in the MLS range of 'dst' to the high level of 'src'.
 */
static inline int mls_context_cpy_high(context_struct_t *dst, const context_struct_t *src)
{
	int rc;

dst->range.level[0].sens = src->range.level[1].sens;
	rc = ebitmap_cpy(&dst->range.level[0].cat, &src->range.level[1].cat);
	if (rc)
		goto out;

dst->range.level[1].sens = src->range.level[1].sens;
	rc = ebitmap_cpy(&dst->range.level[1].cat, &src->range.level[1].cat);
	if (rc)
		ebitmap_destroy(&dst->range.level[0].cat);
out:
	return rc;
}

static inline int mls_context_glblub(context_struct_t *dst, const context_struct_t *c1, const context_struct_t *c2)
{
	return mls_range_glblub(&dst->range, &c1->range, &c2->range);
}

static inline int mls_context_cmp(const context_struct_t * c1, const context_struct_t * c2)
{
	return (mls_level_eq(&c1->range.level[0], &c2->range.level[0]) &&
		mls_level_eq(&c1->range.level[1], &c2->range.level[1]));

}

static inline void mls_context_destroy(context_struct_t * c)
{
	if (c == NULL)
		return;

mls_range_destroy(&c->range);
	mls_context_init(c);
}

static inline void context_init(context_struct_t * c)
{
	memset(c, 0, sizeof(*c));
}

static inline int context_cpy(context_struct_t * dst, const context_struct_t * src)
{
	dst->user = src->user;
	dst->role = src->role;
	dst->type = src->type;
	return mls_context_cpy(dst, src);
}

static inline void context_destroy(context_struct_t * c)
{
	if (c == NULL)
		return;

c->user = c->role = c->type = 0;
	mls_context_destroy(c);
}

static inline int context_cmp(const context_struct_t * c1, const context_struct_t * c2)
{
	return ((c1->user == c2->user) &&
		(c1->role == c2->role) &&
		(c1->type == c2->type) && mls_context_cmp(c1, c2));
}

#ifdef __cplusplus
}
#endif

#endif

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2024-06-01 02:49:40
..	dir	-	root/root	drwxr-xr-x	2024-06-01 02:49:40
avrule_block.h	text/x-c	1.6 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
avtab.h	text/x-c	4.65 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
conditional.h	text/x-c	4.74 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
constraint.h	text/x-c	2.47 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
context.h	text/x-c	3.49 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
ebitmap.h	text/x-c	3.51 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
expand.h	text/x-c	3.57 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
flask_types.h	text/x-c	1.55 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
hashtab.h	text/x-c	3.34 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
hierarchy.h	text/x-c	1.78 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
link.h	text/x-c	517 B	root/root	-rw-r--r--	2024-04-01 08:06:03
mls_types.h	text/x-c	5.04 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
module.h	text/x-c	1.5 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
polcaps.h	text/x-c	1.57 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
policydb.h	text/x-c	26.21 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
services.h	text/x-c	8.47 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
sidtab.h	text/x-c	1.94 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
symtab.h	text/x-c	1.09 KB	root/root	-rw-r--r--	2024-04-01 08:06:03
util.h	text/x-c	1.48 KB	root/root	-rw-r--r--	2024-04-01 08:06:03