1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* AppArmor security module
*
* This file contains AppArmor basic permission sets definitions.
*
* Copyright 2017 Canonical Ltd.
*/
#ifndef __AA_PERM_H
#define __AA_PERM_H
#include <linux/fs.h>
#include "label.h"
#define AA_MAY_EXEC MAY_EXEC
#define AA_MAY_WRITE MAY_WRITE
#define AA_MAY_READ MAY_READ
#define AA_MAY_APPEND MAY_APPEND
#define AA_MAY_CREATE 0x0010
#define AA_MAY_DELETE 0x0020
#define AA_MAY_OPEN 0x0040
#define AA_MAY_RENAME 0x0080 /* pair */
#define AA_MAY_SETATTR 0x0100 /* meta write */
#define AA_MAY_GETATTR 0x0200 /* meta read */
#define AA_MAY_SETCRED 0x0400 /* security cred/attr */
#define AA_MAY_GETCRED 0x0800
#define AA_MAY_CHMOD 0x1000 /* pair */
#define AA_MAY_CHOWN 0x2000 /* pair */
#define AA_MAY_CHGRP 0x4000 /* pair */
#define AA_MAY_LOCK 0x8000 /* LINK_SUBSET overlaid */
#define AA_EXEC_MMAP 0x00010000
#define AA_MAY_MPROT 0x00020000 /* extend conditions */
#define AA_MAY_LINK 0x00040000 /* pair */
#define AA_MAY_SNAPSHOT 0x00080000 /* pair */
#define AA_MAY_DELEGATE
#define AA_CONT_MATCH 0x08000000
#define AA_MAY_STACK 0x10000000
#define AA_MAY_ONEXEC 0x20000000 /* either stack or change_profile */
#define AA_MAY_CHANGE_PROFILE 0x40000000
#define AA_MAY_CHANGEHAT 0x80000000
#define AA_LINK_SUBSET AA_MAY_LOCK /* overlaid */
#define PERMS_CHRS_MASK (MAY_READ | MAY_WRITE | AA_MAY_CREATE | \
AA_MAY_DELETE | AA_MAY_LINK | AA_MAY_LOCK | \
AA_MAY_EXEC | AA_EXEC_MMAP | AA_MAY_APPEND)
#define PERMS_NAMES_MASK (PERMS_CHRS_MASK | AA_MAY_OPEN | AA_MAY_RENAME | \
AA_MAY_SETATTR | AA_MAY_GETATTR | AA_MAY_SETCRED | \
AA_MAY_GETCRED | AA_MAY_CHMOD | AA_MAY_CHOWN | \
AA_MAY_CHGRP | AA_MAY_MPROT | AA_MAY_SNAPSHOT | \
AA_MAY_STACK | AA_MAY_ONEXEC | \
AA_MAY_CHANGE_PROFILE | AA_MAY_CHANGEHAT)
extern const char aa_file_perm_chrs[];
extern const char *aa_file_perm_names[];
struct aa_perms {
u32 allow;
u32 audit; /* set only when allow is set */
u32 deny; /* explicit deny, or conflict if allow also set */
u32 quiet; /* set only when ~allow | deny */
u32 kill; /* set only when ~allow | deny */
u32 stop; /* set only when ~allow | deny */
u32 complain; /* accumulates only used when ~allow & ~deny */
u32 cond; /* set only when ~allow and ~deny */
u32 hide; /* set only when ~allow | deny */
u32 prompt; /* accumulates only used when ~allow & ~deny */
/* Reserved:
* u32 subtree; / * set only when allow is set * /
*/
u16 xindex;
};
#define ALL_PERMS_MASK 0xffffffff
extern struct aa_perms nullperms;
extern struct aa_perms allperms;
#define xcheck(FN1, FN2) \
({ \
int e, error = FN1; \
e = FN2; \
if (e) \
error = e; \
error; \
})
/*
* TODO: update for labels pointing to labels instead of profiles
* TODO: optimize the walk, currently does subwalk of L2 for each P in L1
* gah this doesn't allow for label compound check!!!!
*/
#define xcheck_ns_profile_profile(P1, P2, FN, args...) \
({ \
int ____e = 0; \
if (P1->ns == P2->ns) \
____e = FN((P1), (P2), args); \
(____e); \
})
#define xcheck_ns_profile_label(P, L, FN, args...) \
({ \
struct aa_profile *__p2; \
fn_for_each((L), __p2, \
xcheck_ns_profile_profile((P), __p2, (FN), args)); \
})
#define xcheck_ns_labels(L1, L2, FN, args...) \
({ \
struct aa_profile *__p1; \
fn_for_each((L1), __p1, FN(__p1, (L2), args)); \
})
/* Do the cross check but applying FN at the profiles level */
#define xcheck_labels_profiles(L1, L2, FN, args...) \
xcheck_ns_labels((L1), (L2), xcheck_ns_profile_label, (FN), args)
#define xcheck_labels(L1, L2, P, FN1, FN2) \
xcheck(fn_for_each((L1), (P), (FN1)), fn_for_each((L2), (P), (FN2)))
void aa_perm_mask_to_str(char *str, size_t str_size, const char *chrs,
u32 mask);
void aa_audit_perm_names(struct audit_buffer *ab, const char * const *names,
u32 mask);
void aa_audit_perm_mask(struct audit_buffer *ab, u32 mask, const char *chrs,
u32 chrsmask, const char * const *names, u32 namesmask);
void aa_apply_modes_to_perms(struct aa_profile *profile,
struct aa_perms *perms);
void aa_compute_perms(struct aa_dfa *dfa, unsigned int state,
struct aa_perms *perms);
void aa_perms_accum(struct aa_perms *accum, struct aa_perms *addend);
void aa_perms_accum_raw(struct aa_perms *accum, struct aa_perms *addend);
void aa_profile_match_label(struct aa_profile *profile, struct aa_label *label,
int type, u32 request, struct aa_perms *perms);
int aa_profile_label_perm(struct aa_profile *profile, struct aa_profile *target,
u32 request, int type, u32 *deny,
struct common_audit_data *sa);
int aa_check_perms(struct aa_profile *profile, struct aa_perms *perms,
u32 request, struct common_audit_data *sa,
void (*cb)(struct audit_buffer *, void *));
#endif /* __AA_PERM_H */
|
