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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022 Semihalf, Stormshield
* Copyright (c) 2018 Ian Lepore <ian@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/priv.h>
#include <sys/sysctl.h>
#include <sys/ucred.h>
#include <security/mac/mac_policy.h>
SYSCTL_DECL(_security_mac);
static SYSCTL_NODE(_security_mac, OID_AUTO, pimd,
CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
"mac_pimd policy controls");
static int pimd_enabled = 0;
SYSCTL_INT(_security_mac_pimd, OID_AUTO, enabled, CTLFLAG_RWTUN,
&pimd_enabled, 0, "Enable mac_pimd policy");
static int pimd_uid = 0;
SYSCTL_INT(_security_mac_pimd, OID_AUTO, uid, CTLFLAG_RWTUN,
&pimd_uid, 0, "User id for pimd user");
static int
pimd_priv_grant(struct ucred *cred, int priv)
{
if (pimd_enabled && cred->cr_uid == pimd_uid) {
switch (priv) {
case PRIV_NETINET_MROUTE:
return (0);
default:
break;
}
}
return (EPERM);
}
static struct mac_policy_ops pimd_ops =
{
.mpo_priv_grant = pimd_priv_grant,
};
MAC_POLICY_SET(&pimd_ops, mac_pimd, "MAC/pimd",
MPC_LOADTIME_FLAG_UNLOADOK, NULL);
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