/* * A constraint is a condition that must be satisfied in * order for one or more permissions to be granted. * Constraints are used to impose additional restrictions * beyond the type-based rules in `te' or the role-based * transition rules in `rbac'. Constraints are typically * used to prevent a process from transitioning to a new user * identity or role unless it is in a privileged type. * Constraints are likewise typically used to prevent a * process from labeling an object with a different user * identity. * * Author : Stephen Smalley, <sds@epoch.ncsc.mil> */ #ifndef _SS_CONSTRAINT_H_ #define _SS_CONSTRAINT_H_ #include "ebitmap.h" #define CEXPR_MAXDEPTH 5 struct constraint_expr { #define CEXPR_NOT 1 /* not expr */ #define CEXPR_AND 2 /* expr and expr */ #define CEXPR_OR 3 /* expr or expr */ #define CEXPR_ATTR 4 /* attr op attr */ #define CEXPR_NAMES 5 /* attr op names */ u32 expr_type; /* expression type */ #define CEXPR_USER 1 /* user */ #define CEXPR_ROLE 2 /* role */ #define CEXPR_TYPE 4 /* type */ #define CEXPR_TARGET 8 /* target if set, source otherwise */ #define CEXPR_XTARGET 16 /* special 3rd target for validatetrans rule */ #define CEXPR_L1L2 32 /* low level 1 vs. low level 2 */ #define CEXPR_L1H2 64 /* low level 1 vs. high level 2 */ #define CEXPR_H1L2 128 /* high level 1 vs. low level 2 */ #define CEXPR_H1H2 256 /* high level 1 vs. high level 2 */ #define CEXPR_L1H1 512 /* low level 1 vs. high level 1 */ #define CEXPR_L2H2 1024 /* low level 2 vs. high level 2 */ u32 attr; /* attribute */ #define CEXPR_EQ 1 /* == or eq */ #define CEXPR_NEQ 2 /* != */ #define CEXPR_DOM 3 /* dom */ #define CEXPR_DOMBY 4 /* domby */ #define CEXPR_INCOMP 5 /* incomp */ u32 op; /* operator */ struct ebitmap names; /* names */ struct type_set *type_names; struct constraint_expr *next; /* next expression */ }; struct constraint_node { u32 permissions; /* constrained permissions */ struct constraint_expr *expr; /* constraint on permissions */ struct constraint_node *next; /* next constraint */ }; #endif /* _SS_CONSTRAINT_H_ */Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrew Morton | 136 | 77.27% | 1 | 33.33% |
| Darrel Goeddel | 35 | 19.89% | 1 | 33.33% |
| Richard Haines | 5 | 2.84% | 1 | 33.33% |
| Total | 176 | 100.00% | 3 | 100.00% |