mirror of
https://kernel.googlesource.com/pub/scm/linux/kernel/git/stable/linux-stable.git
synced 2025-10-30 22:47:06 +10:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/*
|
|
* 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.
|
|
*
|
|
* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
|
|
*/
|
|
#ifndef _SS_CONTEXT_H_
|
|
#define _SS_CONTEXT_H_
|
|
|
|
#include "ebitmap.h"
|
|
#include "mls_types.h"
|
|
#include "security.h"
|
|
|
|
/*
|
|
* A security context consists of an authenticated user
|
|
* identity, a role, a type and a MLS range.
|
|
*/
|
|
struct context {
|
|
u32 user;
|
|
u32 role;
|
|
u32 type;
|
|
struct mls_range range;
|
|
};
|
|
|
|
static inline void mls_context_init(struct context *c)
|
|
{
|
|
memset(&c->range, 0, sizeof(c->range));
|
|
}
|
|
|
|
static inline int mls_context_cpy(struct context *dst, struct context *src)
|
|
{
|
|
int rc;
|
|
|
|
if (!selinux_mls_enabled)
|
|
return 0;
|
|
|
|
dst->range.level[0].sens = src->range.level[0].sens;
|
|
rc = ebitmap_cpy(&dst->range.level[0].cat, &src->range.level[0].cat);
|
|
if (rc)
|
|
goto out;
|
|
|
|
dst->range.level[1].sens = src->range.level[1].sens;
|
|
rc = ebitmap_cpy(&dst->range.level[1].cat, &src->range.level[1].cat);
|
|
if (rc)
|
|
ebitmap_destroy(&dst->range.level[0].cat);
|
|
out:
|
|
return rc;
|
|
}
|
|
|
|
static inline int mls_context_cmp(struct context *c1, struct context *c2)
|
|
{
|
|
if (!selinux_mls_enabled)
|
|
return 1;
|
|
|
|
return ((c1->range.level[0].sens == c2->range.level[0].sens) &&
|
|
ebitmap_cmp(&c1->range.level[0].cat,&c2->range.level[0].cat) &&
|
|
(c1->range.level[1].sens == c2->range.level[1].sens) &&
|
|
ebitmap_cmp(&c1->range.level[1].cat,&c2->range.level[1].cat));
|
|
}
|
|
|
|
static inline void mls_context_destroy(struct context *c)
|
|
{
|
|
if (!selinux_mls_enabled)
|
|
return;
|
|
|
|
ebitmap_destroy(&c->range.level[0].cat);
|
|
ebitmap_destroy(&c->range.level[1].cat);
|
|
mls_context_init(c);
|
|
}
|
|
|
|
static inline void context_init(struct context *c)
|
|
{
|
|
memset(c, 0, sizeof(*c));
|
|
}
|
|
|
|
static inline int context_cpy(struct context *dst, struct context *src)
|
|
{
|
|
dst->user = src->user;
|
|
dst->role = src->role;
|
|
dst->type = src->type;
|
|
return mls_context_cpy(dst, src);
|
|
}
|
|
|
|
static inline void context_destroy(struct context *c)
|
|
{
|
|
c->user = c->role = c->type = 0;
|
|
mls_context_destroy(c);
|
|
}
|
|
|
|
static inline int context_cmp(struct context *c1, struct context *c2)
|
|
{
|
|
return ((c1->user == c2->user) &&
|
|
(c1->role == c2->role) &&
|
|
(c1->type == c2->type) &&
|
|
mls_context_cmp(c1, c2));
|
|
}
|
|
|
|
#endif /* _SS_CONTEXT_H_ */
|
|
|