blob: 2bbb41822d8ec8882f8dacbbb4c5f8a1feac59ca [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include <linux/netlink.h>
15#include <linux/rtnetlink.h>
16#include <linux/if.h>
James Morris216efaa2005-08-15 20:34:48 -070017#include <linux/inet_diag.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include <linux/xfrm.h>
19#include <linux/audit.h>
Paul Moore6a96e152014-01-28 14:45:41 -050020#include <linux/sock_diag.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
22#include "flask.h"
23#include "av_permissions.h"
James Morris6a3fbe82011-08-30 12:09:15 +100024#include "security.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025
Eric Parisbfff3aa2008-04-18 17:38:26 -040026struct nlmsg_perm {
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 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 },
Linus Torvalds1da177e2005-04-16 15:20:36 -070062 { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
63 { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
Thomas Grafc7fb64d2005-06-18 22:50:55 -070064 { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
65 { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
Michal Schmidt2f99db22008-11-05 13:35:06 +010066 { RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
67 { RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
68 { RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
Eric Paris350e4f32010-12-16 11:46:51 -050069 { RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
70 { RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
Cong Wang6e73d712012-12-07 18:59:48 +000071 { RTM_NEWNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
72 { RTM_GETNETCONF, NETLINK_ROUTE_SOCKET__NLMSG_READ },
Amerigo Wang9dd9ff92012-12-14 22:09:50 +000073 { RTM_NEWMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
74 { RTM_DELMDB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
Cong Wangee07c6e2012-12-07 00:04:48 +000075 { RTM_GETMDB, NETLINK_ROUTE_SOCKET__NLMSG_READ },
Nicolas Dichtel5bdfbc12015-04-08 18:36:38 +020076 { RTM_NEWNSID, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
Nicolas Dichtel387f9892015-04-08 18:36:39 +020077 { RTM_DELNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
Nicolas Dichtel5bdfbc12015-04-08 18:36:38 +020078 { RTM_GETNSID, NETLINK_ROUTE_SOCKET__NLMSG_READ },
Linus Torvalds1da177e2005-04-16 15:20:36 -070079};
80
Linus Torvalds1da177e2005-04-16 15:20:36 -070081static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
82{
83 { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
James Morris216efaa2005-08-15 20:34:48 -070084 { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
Paul Moore6a96e152014-01-28 14:45:41 -050085 { SOCK_DIAG_BY_FAMILY, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
Linus Torvalds1da177e2005-04-16 15:20:36 -070086};
87
88static struct nlmsg_perm nlmsg_xfrm_perms[] =
89{
90 { XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
91 { XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
92 { XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
93 { XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
94 { XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
95 { XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
96 { XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
Jamal Hadi Salim8c29bfe2006-03-20 19:17:39 -080097 { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
98 { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
Linus Torvalds1da177e2005-04-16 15:20:36 -070099 { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
100 { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
Jamal Hadi Salim8c29bfe2006-03-20 19:17:39 -0800101 { XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
102 { XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
103 { XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
104 { XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
105 { XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
Nicolas Dichtelb0b59b02015-04-10 16:24:26 +0200106 { XFRM_MSG_REPORT, NETLINK_XFRM_SOCKET__NLMSG_READ },
Nicolas Dichtel8d465bb2015-04-10 16:24:27 +0200107 { XFRM_MSG_MIGRATE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
Nicolas Dichtel5b5800f2015-04-08 18:36:42 +0200108 { XFRM_MSG_NEWSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
109 { XFRM_MSG_GETSADINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
Nicolas Dichtel2b7834d2015-04-08 18:36:40 +0200110 { XFRM_MSG_NEWSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
Nicolas Dichtel5e6deeb2015-04-08 18:36:41 +0200111 { XFRM_MSG_GETSPDINFO, NETLINK_XFRM_SOCKET__NLMSG_READ },
Nicolas Dichtelbd2cba02015-04-10 16:24:28 +0200112 { XFRM_MSG_MAPPING, NETLINK_XFRM_SOCKET__NLMSG_READ },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113};
114
115static struct nlmsg_perm nlmsg_audit_perms[] =
116{
James Morrisb207a292005-05-01 08:58:40 -0700117 { AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
118 { AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
119 { AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
120 { AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
121 { AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
Amy Griffis93315ed2006-02-07 12:05:27 -0500122 { AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
123 { AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
124 { AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
James Morrisb207a292005-05-01 08:58:40 -0700125 { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
Steve Grubbc2f0c7c2005-05-06 12:38:39 +0100126 { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
Eric Paris850b0ce2009-06-02 17:01:16 -0400127 { AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
128 { AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
Miloslav Trmac522ed772007-07-15 23:40:56 -0700129 { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
Eric Parisdd34b5d2009-03-05 13:43:35 -0500130 { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT },
Eric Parisb805b192013-05-24 12:09:50 -0400131 { AUDIT_GET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_READ },
132 { AUDIT_SET_FEATURE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133};
134
135
136static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
137{
138 int i, err = -EINVAL;
139
140 for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
141 if (nlmsg_type == tab[i].nlmsg_type) {
142 *perm = tab[i].perm;
143 err = 0;
144 break;
145 }
146
147 return err;
148}
149
150int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
151{
152 int err = 0;
153
154 switch (sclass) {
155 case SECCLASS_NETLINK_ROUTE_SOCKET:
Nicolas Dichtelcf890132015-04-13 15:20:37 +0200156 /* RTM_MAX always point to RTM_SETxxxx, ie RTM_NEWxxx + 3 */
157 BUILD_BUG_ON(RTM_MAX != (RTM_NEWNSID + 3));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
159 sizeof(nlmsg_route_perms));
160 break;
161
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162 case SECCLASS_NETLINK_TCPDIAG_SOCKET:
163 err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
164 sizeof(nlmsg_tcpdiag_perms));
165 break;
166
167 case SECCLASS_NETLINK_XFRM_SOCKET:
Nicolas Dichtelcf890132015-04-13 15:20:37 +0200168 BUILD_BUG_ON(XFRM_MSG_MAX != XFRM_MSG_MAPPING);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
170 sizeof(nlmsg_xfrm_perms));
171 break;
172
173 case SECCLASS_NETLINK_AUDIT_SOCKET:
Steve Grubb90d526c2005-11-03 15:48:08 +0000174 if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
175 nlmsg_type <= AUDIT_LAST_USER_MSG) ||
176 (nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
Eric Parisbfff3aa2008-04-18 17:38:26 -0400177 nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
David Woodhouse209aba02005-05-18 10:21:07 +0100178 *perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
179 } else {
180 err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
181 sizeof(nlmsg_audit_perms));
182 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 break;
184
185 /* No messaging from userspace, or class unknown/unhandled */
186 default:
187 err = -ENOENT;
188 break;
189 }
190
191 return err;
192}