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/* Author : Stephen Smalley, <sds@epoch.ncsc.mil> */
/* 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>
__BEGIN_DECLS
/*
* 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,
context_struct_t * src)
{
if (mls_range_cpy(&dst->range, &src->range) < 0)
return -1;
return 0;
}
static inline int mls_context_cmp(context_struct_t * c1, 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, 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(context_struct_t * c1, context_struct_t * c2)
{
return ((c1->user == c2->user) &&
(c1->role == c2->role) &&
(c1->type == c2->type) && mls_context_cmp(c1, c2));
}
__END_DECLS
#endif