181 строка
6.3 KiB
C
181 строка
6.3 KiB
C
/*
|
|
* Netlink message type permission tables, for user generated messages.
|
|
*
|
|
* Author: James Morris <jmorris@redhat.com>
|
|
*
|
|
* Copyright (C) 2004 Red Hat, Inc., James Morris <jmorris@redhat.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2,
|
|
* as published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/types.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/netlink.h>
|
|
#include <linux/rtnetlink.h>
|
|
#include <linux/if.h>
|
|
#include <linux/netfilter_ipv4/ip_queue.h>
|
|
#include <linux/inet_diag.h>
|
|
#include <linux/xfrm.h>
|
|
#include <linux/audit.h>
|
|
|
|
#include "flask.h"
|
|
#include "av_permissions.h"
|
|
|
|
struct nlmsg_perm {
|
|
u16 nlmsg_type;
|
|
u32 perm;
|
|
};
|
|
|
|
static struct nlmsg_perm nlmsg_route_perms[] =
|
|
{
|
|
{ RTM_NEWLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETLINK, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_SETLINK, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_NEWADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELADDR, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETADDR, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_NEWROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELROUTE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETROUTE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_NEWNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETNEIGH, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_NEWRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELRULE, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETRULE, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_NEWQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELQDISC, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETQDISC, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_NEWTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETTCLASS, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_NEWTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETTFILTER, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_NEWACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELACTION, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETACTION, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_NEWPREFIX, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETMULTICAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_GETANYCAST, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_GETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
{ RTM_SETNEIGHTBL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_NEWADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_DELADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_WRITE },
|
|
{ RTM_GETADDRLABEL, NETLINK_ROUTE_SOCKET__NLMSG_READ },
|
|
};
|
|
|
|
static struct nlmsg_perm nlmsg_firewall_perms[] =
|
|
{
|
|
{ IPQM_MODE, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
|
|
{ IPQM_VERDICT, NETLINK_FIREWALL_SOCKET__NLMSG_WRITE },
|
|
};
|
|
|
|
static struct nlmsg_perm nlmsg_tcpdiag_perms[] =
|
|
{
|
|
{ TCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
|
|
{ DCCPDIAG_GETSOCK, NETLINK_TCPDIAG_SOCKET__NLMSG_READ },
|
|
};
|
|
|
|
static struct nlmsg_perm nlmsg_xfrm_perms[] =
|
|
{
|
|
{ XFRM_MSG_NEWSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_DELSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_GETSA, NETLINK_XFRM_SOCKET__NLMSG_READ },
|
|
{ XFRM_MSG_NEWPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_DELPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_GETPOLICY, NETLINK_XFRM_SOCKET__NLMSG_READ },
|
|
{ XFRM_MSG_ALLOCSPI, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_ACQUIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_EXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_UPDPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_UPDSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_POLEXPIRE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_FLUSHSA, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_FLUSHPOLICY, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_NEWAE, NETLINK_XFRM_SOCKET__NLMSG_WRITE },
|
|
{ XFRM_MSG_GETAE, NETLINK_XFRM_SOCKET__NLMSG_READ },
|
|
};
|
|
|
|
static struct nlmsg_perm nlmsg_audit_perms[] =
|
|
{
|
|
{ AUDIT_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
|
|
{ AUDIT_SET, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
|
|
{ AUDIT_LIST, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
|
|
{ AUDIT_ADD, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
|
|
{ AUDIT_DEL, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
|
|
{ AUDIT_LIST_RULES, NETLINK_AUDIT_SOCKET__NLMSG_READPRIV },
|
|
{ AUDIT_ADD_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
|
|
{ AUDIT_DEL_RULE, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
|
|
{ AUDIT_USER, NETLINK_AUDIT_SOCKET__NLMSG_RELAY },
|
|
{ AUDIT_SIGNAL_INFO, NETLINK_AUDIT_SOCKET__NLMSG_READ },
|
|
{ AUDIT_TRIM, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
|
|
{ AUDIT_MAKE_EQUIV, NETLINK_AUDIT_SOCKET__NLMSG_WRITE },
|
|
{ AUDIT_TTY_GET, NETLINK_AUDIT_SOCKET__NLMSG_READ },
|
|
{ AUDIT_TTY_SET, NETLINK_AUDIT_SOCKET__NLMSG_TTY_AUDIT },
|
|
};
|
|
|
|
|
|
static int nlmsg_perm(u16 nlmsg_type, u32 *perm, struct nlmsg_perm *tab, size_t tabsize)
|
|
{
|
|
int i, err = -EINVAL;
|
|
|
|
for (i = 0; i < tabsize/sizeof(struct nlmsg_perm); i++)
|
|
if (nlmsg_type == tab[i].nlmsg_type) {
|
|
*perm = tab[i].perm;
|
|
err = 0;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int selinux_nlmsg_lookup(u16 sclass, u16 nlmsg_type, u32 *perm)
|
|
{
|
|
int err = 0;
|
|
|
|
switch (sclass) {
|
|
case SECCLASS_NETLINK_ROUTE_SOCKET:
|
|
err = nlmsg_perm(nlmsg_type, perm, nlmsg_route_perms,
|
|
sizeof(nlmsg_route_perms));
|
|
break;
|
|
|
|
case SECCLASS_NETLINK_FIREWALL_SOCKET:
|
|
case SECCLASS_NETLINK_IP6FW_SOCKET:
|
|
err = nlmsg_perm(nlmsg_type, perm, nlmsg_firewall_perms,
|
|
sizeof(nlmsg_firewall_perms));
|
|
break;
|
|
|
|
case SECCLASS_NETLINK_TCPDIAG_SOCKET:
|
|
err = nlmsg_perm(nlmsg_type, perm, nlmsg_tcpdiag_perms,
|
|
sizeof(nlmsg_tcpdiag_perms));
|
|
break;
|
|
|
|
case SECCLASS_NETLINK_XFRM_SOCKET:
|
|
err = nlmsg_perm(nlmsg_type, perm, nlmsg_xfrm_perms,
|
|
sizeof(nlmsg_xfrm_perms));
|
|
break;
|
|
|
|
case SECCLASS_NETLINK_AUDIT_SOCKET:
|
|
if ((nlmsg_type >= AUDIT_FIRST_USER_MSG &&
|
|
nlmsg_type <= AUDIT_LAST_USER_MSG) ||
|
|
(nlmsg_type >= AUDIT_FIRST_USER_MSG2 &&
|
|
nlmsg_type <= AUDIT_LAST_USER_MSG2)) {
|
|
*perm = NETLINK_AUDIT_SOCKET__NLMSG_RELAY;
|
|
} else {
|
|
err = nlmsg_perm(nlmsg_type, perm, nlmsg_audit_perms,
|
|
sizeof(nlmsg_audit_perms));
|
|
}
|
|
break;
|
|
|
|
/* No messaging from userspace, or class unknown/unhandled */
|
|
default:
|
|
err = -ENOENT;
|
|
break;
|
|
}
|
|
|
|
return err;
|
|
}
|