| 1 |
62 |
marcus.erl |
/*
|
| 2 |
|
|
* A constraint is a condition that must be satisfied in
|
| 3 |
|
|
* order for one or more permissions to be granted.
|
| 4 |
|
|
* Constraints are used to impose additional restrictions
|
| 5 |
|
|
* beyond the type-based rules in `te' or the role-based
|
| 6 |
|
|
* transition rules in `rbac'. Constraints are typically
|
| 7 |
|
|
* used to prevent a process from transitioning to a new user
|
| 8 |
|
|
* identity or role unless it is in a privileged type.
|
| 9 |
|
|
* Constraints are likewise typically used to prevent a
|
| 10 |
|
|
* process from labeling an object with a different user
|
| 11 |
|
|
* identity.
|
| 12 |
|
|
*
|
| 13 |
|
|
* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
|
| 14 |
|
|
*/
|
| 15 |
|
|
#ifndef _SS_CONSTRAINT_H_
|
| 16 |
|
|
#define _SS_CONSTRAINT_H_
|
| 17 |
|
|
|
| 18 |
|
|
#include "ebitmap.h"
|
| 19 |
|
|
|
| 20 |
|
|
#define CEXPR_MAXDEPTH 5
|
| 21 |
|
|
|
| 22 |
|
|
struct constraint_expr {
|
| 23 |
|
|
#define CEXPR_NOT 1 /* not expr */
|
| 24 |
|
|
#define CEXPR_AND 2 /* expr and expr */
|
| 25 |
|
|
#define CEXPR_OR 3 /* expr or expr */
|
| 26 |
|
|
#define CEXPR_ATTR 4 /* attr op attr */
|
| 27 |
|
|
#define CEXPR_NAMES 5 /* attr op names */
|
| 28 |
|
|
u32 expr_type; /* expression type */
|
| 29 |
|
|
|
| 30 |
|
|
#define CEXPR_USER 1 /* user */
|
| 31 |
|
|
#define CEXPR_ROLE 2 /* role */
|
| 32 |
|
|
#define CEXPR_TYPE 4 /* type */
|
| 33 |
|
|
#define CEXPR_TARGET 8 /* target if set, source otherwise */
|
| 34 |
|
|
#define CEXPR_XTARGET 16 /* special 3rd target for validatetrans rule */
|
| 35 |
|
|
#define CEXPR_L1L2 32 /* low level 1 vs. low level 2 */
|
| 36 |
|
|
#define CEXPR_L1H2 64 /* low level 1 vs. high level 2 */
|
| 37 |
|
|
#define CEXPR_H1L2 128 /* high level 1 vs. low level 2 */
|
| 38 |
|
|
#define CEXPR_H1H2 256 /* high level 1 vs. high level 2 */
|
| 39 |
|
|
#define CEXPR_L1H1 512 /* low level 1 vs. high level 1 */
|
| 40 |
|
|
#define CEXPR_L2H2 1024 /* low level 2 vs. high level 2 */
|
| 41 |
|
|
u32 attr; /* attribute */
|
| 42 |
|
|
|
| 43 |
|
|
#define CEXPR_EQ 1 /* == or eq */
|
| 44 |
|
|
#define CEXPR_NEQ 2 /* != */
|
| 45 |
|
|
#define CEXPR_DOM 3 /* dom */
|
| 46 |
|
|
#define CEXPR_DOMBY 4 /* domby */
|
| 47 |
|
|
#define CEXPR_INCOMP 5 /* incomp */
|
| 48 |
|
|
u32 op; /* operator */
|
| 49 |
|
|
|
| 50 |
|
|
struct ebitmap names; /* names */
|
| 51 |
|
|
|
| 52 |
|
|
struct constraint_expr *next; /* next expression */
|
| 53 |
|
|
};
|
| 54 |
|
|
|
| 55 |
|
|
struct constraint_node {
|
| 56 |
|
|
u32 permissions; /* constrained permissions */
|
| 57 |
|
|
struct constraint_expr *expr; /* constraint on permissions */
|
| 58 |
|
|
struct constraint_node *next; /* next constraint */
|
| 59 |
|
|
};
|
| 60 |
|
|
|
| 61 |
|
|
#endif /* _SS_CONSTRAINT_H_ */
|
