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1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Multi-level security (MLS) policy operations.
4 *
5 * Author : Stephen Smalley, <sds@tycho.nsa.gov>
6 */
7/*
8 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
9 *
10 * Support for enhanced MLS infrastructure.
11 *
12 * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
13 */
14/*
15 * Updated: Hewlett-Packard <paul@paul-moore.com>
16 *
17 * Added support to import/export the MLS label from NetLabel
18 *
19 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
20 */
21
22#ifndef _SS_MLS_H_
23#define _SS_MLS_H_
24
25#include <linux/jhash.h>
26
27#include "context.h"
28#include "ebitmap.h"
29#include "policydb.h"
30
31int mls_compute_context_len(struct policydb *p, struct context *context);
32void mls_sid_to_context(struct policydb *p, struct context *context,
33 char **scontext);
34int mls_context_isvalid(struct policydb *p, struct context *c);
35int mls_range_isvalid(struct policydb *p, struct mls_range *r);
36int mls_level_isvalid(struct policydb *p, struct mls_level *l);
37
38int mls_context_to_sid(struct policydb *p,
39 char oldc,
40 char *scontext,
41 struct context *context,
42 struct sidtab *s,
43 u32 def_sid);
44
45int mls_from_string(struct policydb *p, char *str, struct context *context,
46 gfp_t gfp_mask);
47
48int mls_range_set(struct context *context, struct mls_range *range);
49
50int mls_convert_context(struct policydb *oldp,
51 struct policydb *newp,
52 struct context *oldc,
53 struct context *newc);
54
55int mls_compute_sid(struct policydb *p,
56 struct context *scontext,
57 struct context *tcontext,
58 u16 tclass,
59 u32 specified,
60 struct context *newcontext,
61 bool sock);
62
63int mls_setup_user_range(struct policydb *p,
64 struct context *fromcon, struct user_datum *user,
65 struct context *usercon);
66
67#ifdef CONFIG_NETLABEL
68void mls_export_netlbl_lvl(struct policydb *p,
69 struct context *context,
70 struct netlbl_lsm_secattr *secattr);
71void mls_import_netlbl_lvl(struct policydb *p,
72 struct context *context,
73 struct netlbl_lsm_secattr *secattr);
74int mls_export_netlbl_cat(struct policydb *p,
75 struct context *context,
76 struct netlbl_lsm_secattr *secattr);
77int mls_import_netlbl_cat(struct policydb *p,
78 struct context *context,
79 struct netlbl_lsm_secattr *secattr);
80#else
81static inline void mls_export_netlbl_lvl(struct policydb *p,
82 struct context *context,
83 struct netlbl_lsm_secattr *secattr)
84{
85 return;
86}
87static inline void mls_import_netlbl_lvl(struct policydb *p,
88 struct context *context,
89 struct netlbl_lsm_secattr *secattr)
90{
91 return;
92}
93static inline int mls_export_netlbl_cat(struct policydb *p,
94 struct context *context,
95 struct netlbl_lsm_secattr *secattr)
96{
97 return -ENOMEM;
98}
99static inline int mls_import_netlbl_cat(struct policydb *p,
100 struct context *context,
101 struct netlbl_lsm_secattr *secattr)
102{
103 return -ENOMEM;
104}
105#endif
106
107static inline u32 mls_range_hash(const struct mls_range *r, u32 hash)
108{
109 hash = jhash_2words(r->level[0].sens, r->level[1].sens, hash);
110 hash = ebitmap_hash(&r->level[0].cat, hash);
111 hash = ebitmap_hash(&r->level[1].cat, hash);
112 return hash;
113}
114
115#endif /* _SS_MLS_H */
116
1/* SPDX-License-Identifier: GPL-2.0 */
2/*
3 * Multi-level security (MLS) policy operations.
4 *
5 * Author : Stephen Smalley, <stephen.smalley.work@gmail.com>
6 */
7
8/*
9 * Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
10 * Support for enhanced MLS infrastructure.
11 * Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
12 *
13 * Updated: Hewlett-Packard <paul@paul-moore.com>
14 * Added support to import/export the MLS label from NetLabel
15 * Copyright (X) Hewlett-Packard Development Company, L.P., 2006
16 */
17
18#ifndef _SS_MLS_H_
19#define _SS_MLS_H_
20
21#include <linux/jhash.h>
22
23#include "context.h"
24#include "ebitmap.h"
25#include "policydb.h"
26
27int mls_compute_context_len(struct policydb *p, struct context *context);
28void mls_sid_to_context(struct policydb *p, struct context *context,
29 char **scontext);
30int mls_context_isvalid(struct policydb *p, struct context *c);
31int mls_range_isvalid(struct policydb *p, struct mls_range *r);
32int mls_level_isvalid(struct policydb *p, struct mls_level *l);
33
34int mls_context_to_sid(struct policydb *p, char oldc, char *scontext,
35 struct context *context, struct sidtab *s, u32 def_sid);
36
37int mls_from_string(struct policydb *p, char *str, struct context *context,
38 gfp_t gfp_mask);
39
40int mls_range_set(struct context *context, struct mls_range *range);
41
42int mls_convert_context(struct policydb *oldp, struct policydb *newp,
43 struct context *oldc, struct context *newc);
44
45int mls_compute_sid(struct policydb *p, struct context *scontext,
46 struct context *tcontext, u16 tclass, u32 specified,
47 struct context *newcontext, bool sock);
48
49int mls_setup_user_range(struct policydb *p, struct context *fromcon,
50 struct user_datum *user, struct context *usercon);
51
52#ifdef CONFIG_NETLABEL
53void mls_export_netlbl_lvl(struct policydb *p, struct context *context,
54 struct netlbl_lsm_secattr *secattr);
55void mls_import_netlbl_lvl(struct policydb *p, struct context *context,
56 struct netlbl_lsm_secattr *secattr);
57int mls_export_netlbl_cat(struct policydb *p, struct context *context,
58 struct netlbl_lsm_secattr *secattr);
59int mls_import_netlbl_cat(struct policydb *p, struct context *context,
60 struct netlbl_lsm_secattr *secattr);
61#else
62static inline void mls_export_netlbl_lvl(struct policydb *p,
63 struct context *context,
64 struct netlbl_lsm_secattr *secattr)
65{
66 return;
67}
68static inline void mls_import_netlbl_lvl(struct policydb *p,
69 struct context *context,
70 struct netlbl_lsm_secattr *secattr)
71{
72 return;
73}
74static inline int mls_export_netlbl_cat(struct policydb *p,
75 struct context *context,
76 struct netlbl_lsm_secattr *secattr)
77{
78 return -ENOMEM;
79}
80static inline int mls_import_netlbl_cat(struct policydb *p,
81 struct context *context,
82 struct netlbl_lsm_secattr *secattr)
83{
84 return -ENOMEM;
85}
86#endif
87
88static inline u32 mls_range_hash(const struct mls_range *r, u32 hash)
89{
90 hash = jhash_2words(r->level[0].sens, r->level[1].sens, hash);
91 hash = ebitmap_hash(&r->level[0].cat, hash);
92 hash = ebitmap_hash(&r->level[1].cat, hash);
93 return hash;
94}
95
96#endif /* _SS_MLS_H */