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1/*
2 * Netlink message type permission tables, for user generated messages.
3 *
4 * Author: James Morris <jmorris@redhat.com>
5 *
6 * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2,
10 * as published by the Free Software Foundation.
11 */
12#include <linux/types.h>
13#include <linux/kernel.h>
14#include <linux/netlink.h>
15#include <linux/rtnetlink.h>
16#include <linux/if.h>
17#include <linux/inet_diag.h>
18#include <linux/xfrm.h>
19#include <linux/audit.h>
20#include <linux/sock_diag.h>
21
22#include "flask.h"
23#include "av_permissions.h"
24#include "security.h"
25
26struct nlmsg_perm {
27 u16 nlmsg_type;
28 u32 perm;
29};
30
31static struct nlmsg_perm nlmsg_route_perms[] =
32{
33 { RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
34 { RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
35 { RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ },
36 { RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
37 { RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
38 { RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
39 { RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ },
40 { RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
41 { RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
42 { RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
43 { RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
44 { RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
45 { RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ },
46 { RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
47 { RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
48 { RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
49 { RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
50 { RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
51 { RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ },
52 { RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
53 { RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
54 { RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
55 { RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
56 { RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
57 { RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ },
58 { RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
59 { RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
60 { RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
61 { RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
62 { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
63 { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
64 { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
65 { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
66 { RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
67 { RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
68 { RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
69 { RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
70 { RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
71 { RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
72 { RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ },
73 { RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
74 { RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
75 { RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
76};
77
78static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
79{
80 { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
81 { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
82 { SOCK_DIAG_BY_FAMILY, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
83};
84
85static struct nlmsg_perm nlmsg_xfrm_perms[] =
86{
87 { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
88 { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
89 { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
90 { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
91 { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
92 { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
93 { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
94 { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
95 { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
96 { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
97 { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
98 { XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
99 { XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
100 { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
101 { XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
102 { XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
103};
104
105static struct nlmsg_perm nlmsg_audit_perms[] =
106{
107 { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
108 { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
109 { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
110 { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
111 { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
112 { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
113 { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
114 { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
115 { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
116 { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
117 { AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
118 { AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
119 { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
120 { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT },
121 { AUDIT_GET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_READ },
122 { AUDIT_SET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
123};
124
125
126static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
127{
128 int i, err = -EINVAL;
129
130 for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
131 if (nlmsg_type == tab[i].nlmsg_type) {
132 *perm = tab[i].perm;
133 err = 0;
134 break;
135 }
136
137 return err;
138}
139
140int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
141{
142 int err = 0;
143
144 switch (sclass) {
145 case SECCLASS_NETLINK_ROUTE_SOCKET:
146 err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
147 sizeof(nlmsg_route_perms));
148 break;
149
150 case SECCLASS_NETLINK_TCPDIAG_SOCKET:
151 err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
152 sizeof(nlmsg_tcpdiag_perms));
153 break;
154
155 case SECCLASS_NETLINK_XFRM_SOCKET:
156 err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
157 sizeof(nlmsg_xfrm_perms));
158 break;
159
160 case SECCLASS_NETLINK_AUDIT_SOCKET:
161 if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
162 nlmsg_type <= AUDIT_LAST_USER_MSG) ||
163 (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
164 nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
165 *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
166 } else {
167 err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
168 sizeof(nlmsg_audit_perms));
169 }
170 break;
171
172 /* No messaging from userspace, or class unknown/unhandled */
173 default:
174 err = -ENOENT;
175 break;
176 }
177
178 return err;
179}
1/*
2 * Netlink message type permission tables, for user generated messages.
3 *
4 * Author: James Morris <jmorris@redhat.com>
5 *
6 * Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2,
10 * as published by the Free Software Foundation.
11 */
12#include <linux/types.h>
13#include <linux/kernel.h>
14#include <linux/netlink.h>
15#include <linux/rtnetlink.h>
16#include <linux/if.h>
17#include <linux/inet_diag.h>
18#include <linux/xfrm.h>
19#include <linux/audit.h>
20
21#include "flask.h"
22#include "av_permissions.h"
23#include "security.h"
24
25struct nlmsg_perm {
26 u16 nlmsg_type;
27 u32 perm;
28};
29
30static struct nlmsg_perm nlmsg_route_perms[] =
31{
32 { RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
33 { RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
34 { RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ },
35 { RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
36 { RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
37 { RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
38 { RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ },
39 { RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
40 { RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
41 { RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
42 { RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
43 { RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
44 { RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ },
45 { RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
46 { RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
47 { RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
48 { RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
49 { RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
50 { RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ },
51 { RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
52 { RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
53 { RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
54 { RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
55 { RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
56 { RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ },
57 { RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
58 { RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
59 { RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
60 { RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
61 { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
62 { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
63 { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
64 { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
65 { RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
66 { RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
67 { RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
68 { RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
69 { RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
70};
71
72static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
73{
74 { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
75 { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
76};
77
78static struct nlmsg_perm nlmsg_xfrm_perms[] =
79{
80 { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
81 { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
82 { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
83 { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
84 { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
85 { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
86 { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
87 { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
88 { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
89 { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
90 { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
91 { XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
92 { XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
93 { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
94 { XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
95 { XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
96};
97
98static struct nlmsg_perm nlmsg_audit_perms[] =
99{
100 { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
101 { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
102 { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
103 { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
104 { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
105 { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
106 { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
107 { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
108 { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
109 { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
110 { AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
111 { AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
112 { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
113 { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT },
114};
115
116
117static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
118{
119 int i, err = -EINVAL;
120
121 for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
122 if (nlmsg_type == tab[i].nlmsg_type) {
123 *perm = tab[i].perm;
124 err = 0;
125 break;
126 }
127
128 return err;
129}
130
131int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
132{
133 int err = 0;
134
135 switch (sclass) {
136 case SECCLASS_NETLINK_ROUTE_SOCKET:
137 err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
138 sizeof(nlmsg_route_perms));
139 break;
140
141 case SECCLASS_NETLINK_TCPDIAG_SOCKET:
142 err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
143 sizeof(nlmsg_tcpdiag_perms));
144 break;
145
146 case SECCLASS_NETLINK_XFRM_SOCKET:
147 err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
148 sizeof(nlmsg_xfrm_perms));
149 break;
150
151 case SECCLASS_NETLINK_AUDIT_SOCKET:
152 if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
153 nlmsg_type <= AUDIT_LAST_USER_MSG) ||
154 (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
155 nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
156 *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
157 } else {
158 err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
159 sizeof(nlmsg_audit_perms));
160 }
161 break;
162
163 /* No messaging from userspace, or class unknown/unhandled */
164 default:
165 err = -ENOENT;
166 break;
167 }
168
169 return err;
170}