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63 lines
2.1 KiB
63 lines
2.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* A constraint is a condition that must be satisfied in |
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* order for one or more permissions to be granted. |
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* Constraints are used to impose additional restrictions |
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* beyond the type-based rules in `te' or the role-based |
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* transition rules in `rbac'. Constraints are typically |
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* used to prevent a process from transitioning to a new user |
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* identity or role unless it is in a privileged type. |
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* Constraints are likewise typically used to prevent a |
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* process from labeling an object with a different user |
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* identity. |
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* |
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* Author : Stephen Smalley, <[email protected]> |
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*/ |
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#ifndef _SS_CONSTRAINT_H_ |
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#define _SS_CONSTRAINT_H_ |
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#include "ebitmap.h" |
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#define CEXPR_MAXDEPTH 5 |
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struct constraint_expr { |
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#define CEXPR_NOT 1 /* not expr */ |
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#define CEXPR_AND 2 /* expr and expr */ |
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#define CEXPR_OR 3 /* expr or expr */ |
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#define CEXPR_ATTR 4 /* attr op attr */ |
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#define CEXPR_NAMES 5 /* attr op names */ |
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u32 expr_type; /* expression type */ |
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#define CEXPR_USER 1 /* user */ |
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#define CEXPR_ROLE 2 /* role */ |
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#define CEXPR_TYPE 4 /* type */ |
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#define CEXPR_TARGET 8 /* target if set, source otherwise */ |
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#define CEXPR_XTARGET 16 /* special 3rd target for validatetrans rule */ |
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#define CEXPR_L1L2 32 /* low level 1 vs. low level 2 */ |
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#define CEXPR_L1H2 64 /* low level 1 vs. high level 2 */ |
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#define CEXPR_H1L2 128 /* high level 1 vs. low level 2 */ |
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#define CEXPR_H1H2 256 /* high level 1 vs. high level 2 */ |
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#define CEXPR_L1H1 512 /* low level 1 vs. high level 1 */ |
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#define CEXPR_L2H2 1024 /* low level 2 vs. high level 2 */ |
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u32 attr; /* attribute */ |
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#define CEXPR_EQ 1 /* == or eq */ |
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#define CEXPR_NEQ 2 /* != */ |
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#define CEXPR_DOM 3 /* dom */ |
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#define CEXPR_DOMBY 4 /* domby */ |
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#define CEXPR_INCOMP 5 /* incomp */ |
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u32 op; /* operator */ |
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struct ebitmap names; /* names */ |
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struct type_set *type_names; |
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struct constraint_expr *next; /* next expression */ |
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}; |
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struct constraint_node { |
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u32 permissions; /* constrained permissions */ |
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struct constraint_expr *expr; /* constraint on permissions */ |
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struct constraint_node *next; /* next constraint */ |
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}; |
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#endif /* _SS_CONSTRAINT_H_ */
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