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sys/security/mac_ntpd/mac_ntpd.c
Property | Old Value | New Value |
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svn:eol-style | null | native \ No newline at end of property |
svn:keywords | null | FreeBSD=%H \ No newline at end of property |
svn:mime-type | null | text/plain \ No newline at end of property |
/*- | |||||
* SPDX-License-Identifier: BSD-2-Clause | |||||
* | |||||
* 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. | |||||
* | |||||
* $FreeBSD$ | |||||
*/ | |||||
#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, ntpd, CTLFLAG_RW, 0, | |||||
"mac_ntpd policy controls"); | |||||
static int ntpd_enabled = 1; | |||||
SYSCTL_INT(_security_mac_ntpd, OID_AUTO, enabled, CTLFLAG_RW, | |||||
&ntpd_enabled, 0, "Enable mac_ntpd policy"); | |||||
static int ntpd_uid = 123; | |||||
SYSCTL_INT(_security_mac_ntpd, OID_AUTO, uid, CTLFLAG_RWTUN, | |||||
&ntpd_uid, 0, "User id for ntpd user"); | |||||
static int | |||||
ntpd_priv_grant(struct ucred *cred, int priv) | |||||
{ | |||||
if (ntpd_enabled && cred->cr_uid == ntpd_uid) { | |||||
switch (priv) { | |||||
case PRIV_ADJTIME: | |||||
case PRIV_CLOCK_SETTIME: | |||||
case PRIV_NTP_ADJTIME: | |||||
case PRIV_NETINET_RESERVEDPORT: | |||||
case PRIV_NETINET_REUSEPORT: | |||||
return (0); | |||||
default: | |||||
break; | |||||
} | |||||
} | |||||
return (EPERM); | |||||
} | |||||
static struct mac_policy_ops ntpd_ops = | |||||
{ | |||||
.mpo_priv_grant = ntpd_priv_grant, | |||||
}; | |||||
MAC_POLICY_SET(&ntpd_ops, mac_ntpd, "MAC/ntpd", | |||||
MPC_LOADTIME_FLAG_UNLOADOK, NULL); |