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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