security/apparmor/include/net.h

   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 static inline struct aa_sk_ctx *aa_sock(const struct sock *sk)
  55 {
  56         return sk->sk_security + apparmor_blob_sizes.lbs_sock;
  57 }
  58
  59 #define DEFINE_AUDIT_NET(NAME, OP, SK, F, T, P)                           \
  60         struct lsm_network_audit NAME ## _net = { .sk = (SK),             \
  61                                                   .family = (F)};         \
  62         DEFINE_AUDIT_DATA(NAME,                                           \
  63                           ((SK) && (F) != AF_UNIX) ? LSM_AUDIT_DATA_NET : \
  64                                                      LSM_AUDIT_DATA_NONE, \
  65                                                      AA_CLASS_NET,        \
  66                           OP);                                            \
  67         NAME.common.u.net = &(NAME ## _net);                              \
  68         NAME.net.type = (T);                                              \
  69         NAME.net.protocol = (P)
  70
  71 #define DEFINE_AUDIT_SK(NAME, OP, SK)                                   \
  72         DEFINE_AUDIT_NET(NAME, OP, SK, (SK)->sk_family, (SK)->sk_type,  \
  73                          (SK)->sk_protocol)
  74
  75
  76 #define af_select(FAMILY, FN, DEF_FN)           \
  77 ({                                              \
  78         int __e;                                \
  79         switch ((FAMILY)) {                     \
  80         default:                                \
  81                 __e = DEF_FN;                   \
  82         }                                       \
  83         __e;                                    \
  84 })
  85
  86 struct aa_secmark {
  87         u8 audit;
  88         u8 deny;
  89         u32 secid;
  90         char *label;
  91 };
  92
  93 extern struct aa_sfs_entry aa_sfs_entry_network[];
  94
  95 void audit_net_cb(struct audit_buffer *ab, void *va);
  96 int aa_profile_af_perm(struct aa_profile *profile,
  97                        struct apparmor_audit_data *ad,
  98                        u32 request, u16 family, int type);
  99 int aa_af_perm(const struct cred *subj_cred, struct aa_label *label,
 100                const char *op, u32 request, u16 family,
 101                int type, int protocol);
 102 static inline int aa_profile_af_sk_perm(struct aa_profile *profile,
 103                                         struct apparmor_audit_data *ad,
 104                                         u32 request,
 105                                         struct sock *sk)
 106 {
 107         return aa_profile_af_perm(profile, ad, request, sk->sk_family,
 108                                   sk->sk_type);
 109 }
 110 int aa_sk_perm(const char *op, u32 request, struct sock *sk);
 111
 112 int aa_sock_file_perm(const struct cred *subj_cred, struct aa_label *label,
 113                       const char *op, u32 request,
 114                       struct socket *sock);
 115
 116 int apparmor_secmark_check(struct aa_label *label, char *op, u32 request,
 117                            u32 secid, const struct sock *sk);
 118
 119 #endif /* __AA_NET_H */