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 __rcu *label; 51 struct aa_label __rcu *peer; 52 struct aa_label __rcu *peer_lastupdate; /* ptr cmp only, no deref */ 53 }; 54 55 static inline struct aa_sk_ctx *aa_sock(const struct sock *sk) 56 { 57 return sk->sk_security + apparmor_blob_sizes.lbs_sock; 58 } 59 60 #define DEFINE_AUDIT_NET(NAME, OP, CRED, SK, F, T, P) \ 61 struct lsm_network_audit NAME ## _net = { .sk = (SK), \ 62 .family = (F)}; \ 63 DEFINE_AUDIT_DATA(NAME, \ 64 ((SK) && (F) != AF_UNIX) ? LSM_AUDIT_DATA_NET : \ 65 LSM_AUDIT_DATA_NONE, \ 66 AA_CLASS_NET, \ 67 OP); \ 68 NAME.common.u.net = &(NAME ## _net); \ 69 NAME.subj_cred = (CRED); \ 70 NAME.net.type = (T); \ 71 NAME.net.protocol = (P) 72 73 #define DEFINE_AUDIT_SK(NAME, OP, CRED, SK) \ 74 DEFINE_AUDIT_NET(NAME, OP, CRED, SK, (SK)->sk_family, (SK)->sk_type, \ 75 (SK)->sk_protocol) 76 77 78 struct aa_secmark { 79 u8 audit; 80 u8 deny; 81 u32 secid; 82 char *label; 83 }; 84 85 extern struct aa_sfs_entry aa_sfs_entry_network[]; 86 extern struct aa_sfs_entry aa_sfs_entry_networkv9[]; 87 88 int aa_do_perms(struct aa_profile *profile, struct aa_policydb *policy, 89 aa_state_t state, u32 request, struct aa_perms *p, 90 struct apparmor_audit_data *ad); 91 /* passing in state returned by XXX_mediates_AF() */ 92 aa_state_t aa_match_to_prot(struct aa_policydb *policy, aa_state_t state, 93 u32 request, u16 af, int type, int protocol, 94 struct aa_perms **p, const char **info); 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, int protocol); 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, sk->sk_protocol); 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 file *file); 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 */ 120