projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | /* |
| 2 | * Netlink message type permission tables, for user generated messages. | |
| 3 | * | |
| 4 | * Author: James Morris <[email protected]> | |
| 5 | * | |
| 6 | * Copyright (C) 2004 Red Hat, Inc., James Morris <[email protected]> | |
| 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> | |
| 1da177e4 LT |
14 | #include <linux/netlink.h> |
| 15 | #include <linux/rtnetlink.h> | |
| 16 | #include <linux/if.h> | |
| 216efaaa | 17 | #include <linux/inet_diag.h> |
| 1da177e4 LT |
18 | #include <linux/xfrm.h> |
| 19 | #include <linux/audit.h> | |
| 20 | ||
| 21 | #include "flask.h" | |
| 22 | #include "av_permissions.h" | |
| 6a3fbe81 | 23 | #include "security.h" |
| 1da177e4 | 24 | |
| bfff3aa4 | 25 | struct nlmsg_perm { |
| 1da177e4 LT |
26 | u16 nlmsg_type; |
| 27 | u32 perm; | |
| 28 | }; | |
| 29 | ||
| 30 | static 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 }, | |
| 1da177e4 LT |
61 | { RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 62 | { RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
| c7fb64db TG |
63 | { RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 64 | { RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
| 2f99db28 MS |
65 | { RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, |
| 66 | { RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
| 67 | { RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ }, | |
| 350e4f31 EP |
68 | { RTM_GETDCB, NETLINK_ROUTE_SOCKET__NLMSG_READ }, |
| 69 | { RTM_SETDCB, NETLINK_ROUTE_SOCKET__NLMSG_WRITE }, | |
| 1da177e4 LT |
70 | }; |
| 71 | ||
| 1da177e4 LT |
72 | static struct nlmsg_perm nlmsg_tcpdiag_perms[] = |
| 73 | { | |
| 74 | { TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, | |
| 216efaaa | 75 | { DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ }, |
| 1da177e4 LT |
76 | }; |
| 77 | ||
| 78 | static 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 }, | |
| 8c29bfe1 JHS |
87 | { XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 88 | { XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
| 1da177e4 LT |
89 | { XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, |
| 90 | { XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE }, | |
| 8c29bfe1 JHS |
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 }, | |
| 1da177e4 LT |
96 | }; |
| 97 | ||
| 98 | static struct nlmsg_perm nlmsg_audit_perms[] = | |
| 99 | { | |
| b207a290 JM |
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 }, | |
| 93315ed6 AG |
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 }, | |
| b207a290 | 108 | { AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY }, |
| c2f0c7c3 | 109 | { AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
| 850b0cee EP |
110 | { AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, |
| 111 | { AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE }, | |
| 522ed776 | 112 | { AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ }, |
| dd34b5d7 | 113 | { AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT }, |
| 1da177e4 LT |
114 | }; |
| 115 | ||
| 116 | ||
| 117 | static 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 | ||
| 131 | int 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 | ||
| 1da177e4 LT |
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: | |
| 90d526c0 SG |
152 | if ((nlmsg_type >= AUDIT_FIRST_USER_MSG && |
| 153 | nlmsg_type <= AUDIT_LAST_USER_MSG) || | |
| 154 | (nlmsg_type >= AUDIT_FIRST_USER_MSG2 && | |
| bfff3aa4 | 155 | nlmsg_type <= AUDIT_LAST_USER_MSG2)) { |
| 209aba03 DW |
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 | } | |
| 1da177e4 LT |
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 | } |