2 * A security context is a set of security attributes
3 * associated with each subject and object controlled
4 * by the security policy. Security contexts are
5 * externally represented as variable-length strings
6 * that can be interpreted by a user or application
7 * with an understanding of the security policy.
8 * Internally, the security server uses a simple
9 * structure. This structure is private to the
10 * security server and can be changed without affecting
11 * clients of the security server.
13 * Author : Stephen Smalley, <sds@epoch.ncsc.mil>
15 #ifndef _SS_CONTEXT_H_
16 #define _SS_CONTEXT_H_
19 #include "mls_types.h"
22 * A security context consists of an authenticated user
23 * identity, a role, a type and a MLS range.
29 #ifdef CONFIG_SECURITY_SELINUX_MLS
30 struct mls_range range;
34 #ifdef CONFIG_SECURITY_SELINUX_MLS
36 static inline void mls_context_init(struct context *c)
38 memset(&c->range, 0, sizeof(c->range));
41 static inline int mls_context_cpy(struct context *dst, struct context *src)
45 dst->range.level[0].sens = src->range.level[0].sens;
46 rc = ebitmap_cpy(&dst->range.level[0].cat, &src->range.level[0].cat);
50 dst->range.level[1].sens = src->range.level[1].sens;
51 rc = ebitmap_cpy(&dst->range.level[1].cat, &src->range.level[1].cat);
53 ebitmap_destroy(&dst->range.level[0].cat);
58 static inline int mls_context_cmp(struct context *c1, struct context *c2)
60 return ((c1->range.level[0].sens == c2->range.level[0].sens) &&
61 ebitmap_cmp(&c1->range.level[0].cat,&c2->range.level[0].cat) &&
62 (c1->range.level[1].sens == c2->range.level[1].sens) &&
63 ebitmap_cmp(&c1->range.level[1].cat,&c2->range.level[1].cat));
66 static inline void mls_context_destroy(struct context *c)
68 ebitmap_destroy(&c->range.level[0].cat);
69 ebitmap_destroy(&c->range.level[1].cat);
75 static inline void mls_context_init(struct context *c)
78 static inline int mls_context_cpy(struct context *dst, struct context *src)
81 static inline int mls_context_cmp(struct context *c1, struct context *c2)
84 static inline void mls_context_destroy(struct context *c)
89 static inline void context_init(struct context *c)
91 memset(c, 0, sizeof(*c));
94 static inline int context_cpy(struct context *dst, struct context *src)
96 dst->user = src->user;
97 dst->role = src->role;
98 dst->type = src->type;
99 return mls_context_cpy(dst, src);
102 static inline void context_destroy(struct context *c)
104 c->user = c->role = c->type = 0;
105 mls_context_destroy(c);
108 static inline int context_cmp(struct context *c1, struct context *c2)
110 return ((c1->user == c2->user) &&
111 (c1->role == c2->role) &&
112 (c1->type == c2->type) &&
113 mls_context_cmp(c1, c2));
116 #endif /* _SS_CONTEXT_H_ */