1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  * AppArmor security module
4  *
5  * This file contains AppArmor network mediation definitions.
6  *
7  * Copyright (C) 1998-2008 Novell/SUSE
8  * Copyright 2009-2017 Canonical Ltd.
9  */
10 
11 #ifndef __AA_NET_H
12 #define __AA_NET_H
13 
14 #include <net/sock.h>
15 #include <linux/path.h>
16 
17 #include "apparmorfs.h"
18 #include "label.h"
19 #include "perms.h"
20 #include "policy.h"
21 
22 #define AA_MAY_SEND		AA_MAY_WRITE
23 #define AA_MAY_RECEIVE		AA_MAY_READ
24 
25 #define AA_MAY_SHUTDOWN		AA_MAY_DELETE
26 
27 #define AA_MAY_CONNECT		AA_MAY_OPEN
28 #define AA_MAY_ACCEPT		0x00100000
29 
30 #define AA_MAY_BIND		0x00200000
31 #define AA_MAY_LISTEN		0x00400000
32 
33 #define AA_MAY_SETOPT		0x01000000
34 #define AA_MAY_GETOPT		0x02000000
35 
36 #define NET_PERMS_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE |    \
37 			AA_MAY_SHUTDOWN | AA_MAY_BIND | AA_MAY_LISTEN |	  \
38 			AA_MAY_CONNECT | AA_MAY_ACCEPT | AA_MAY_SETATTR | \
39 			AA_MAY_GETATTR | AA_MAY_SETOPT | AA_MAY_GETOPT)
40 
41 #define NET_FS_PERMS (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CREATE |	\
42 		      AA_MAY_SHUTDOWN | AA_MAY_CONNECT | AA_MAY_RENAME |\
43 		      AA_MAY_SETATTR | AA_MAY_GETATTR | AA_MAY_CHMOD |	\
44 		      AA_MAY_CHOWN | AA_MAY_CHGRP | AA_MAY_LOCK |	\
45 		      AA_MAY_MPROT)
46 
47 #define NET_PEER_MASK (AA_MAY_SEND | AA_MAY_RECEIVE | AA_MAY_CONNECT |	\
48 		       AA_MAY_ACCEPT)
49 struct aa_sk_ctx {
50 	struct aa_label *label;
51 	struct aa_label *peer;
52 };
53 
54 #define SK_CTX(X) ((X)->sk_security)
55 #define SOCK_ctx(X) SOCK_INODE(X)->i_security
56 #define DEFINE_AUDIT_NET(NAME, OP, SK, F, T, P)				  \
57 	struct lsm_network_audit NAME ## _net = { .sk = (SK),		  \
58 						  .family = (F)};	  \
59 	DEFINE_AUDIT_DATA(NAME,						  \
60 			  ((SK) && (F) != AF_UNIX) ? LSM_AUDIT_DATA_NET : \
61 						     LSM_AUDIT_DATA_NONE, \
62 						     AA_CLASS_NET,        \
63 			  OP);						  \
64 	NAME.u.net = &(NAME ## _net);					  \
65 	aad(&NAME)->net.type = (T);					  \
66 	aad(&NAME)->net.protocol = (P)
67 
68 #define DEFINE_AUDIT_SK(NAME, OP, SK)					\
69 	DEFINE_AUDIT_NET(NAME, OP, SK, (SK)->sk_family, (SK)->sk_type,	\
70 			 (SK)->sk_protocol)
71 
72 
73 #define af_select(FAMILY, FN, DEF_FN)		\
74 ({						\
75 	int __e;				\
76 	switch ((FAMILY)) {			\
77 	default:				\
78 		__e = DEF_FN;			\
79 	}					\
80 	__e;					\
81 })
82 
83 struct aa_secmark {
84 	u8 audit;
85 	u8 deny;
86 	u32 secid;
87 	char *label;
88 };
89 
90 extern struct aa_sfs_entry aa_sfs_entry_network[];
91 
92 void audit_net_cb(struct audit_buffer *ab, void *va);
93 int aa_profile_af_perm(struct aa_profile *profile, struct common_audit_data *sa,
94 		       u32 request, u16 family, int type);
95 int aa_af_perm(struct aa_label *label, const char *op, u32 request, u16 family,
96 	       int type, int protocol);
aa_profile_af_sk_perm(struct aa_profile * profile,struct common_audit_data * sa,u32 request,struct sock * sk)97 static inline int aa_profile_af_sk_perm(struct aa_profile *profile,
98 					struct common_audit_data *sa,
99 					u32 request,
100 					struct sock *sk)
101 {
102 	return aa_profile_af_perm(profile, sa, request, sk->sk_family,
103 				  sk->sk_type);
104 }
105 int aa_sk_perm(const char *op, u32 request, struct sock *sk);
106 
107 int aa_sock_file_perm(struct aa_label *label, const char *op, u32 request,
108 		      struct socket *sock);
109 
110 int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
111 			   u32 secid, const struct sock *sk);
112 
113 #endif /* __AA_NET_H */
114