14b7706264
Create new kernel module for privilege check in case the user wants to run pimd daemon. Sponsored by: Stormshield Obtained from: Semihalf
76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 2022 Semihalf, Stormshield
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* Copyright (c) 2018 Ian Lepore <ian@FreeBSD.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/priv.h>
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#include <sys/sysctl.h>
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#include <sys/ucred.h>
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#include <security/mac/mac_policy.h>
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SYSCTL_DECL(_security_mac);
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static SYSCTL_NODE(_security_mac, OID_AUTO, pimd,
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CTLFLAG_RW | CTLFLAG_MPSAFE, 0,
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"mac_pimd policy controls");
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static int pimd_enabled = 0;
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SYSCTL_INT(_security_mac_pimd, OID_AUTO, enabled, CTLFLAG_RWTUN,
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&pimd_enabled, 0, "Enable mac_pimd policy");
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static int pimd_uid = 0;
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SYSCTL_INT(_security_mac_pimd, OID_AUTO, uid, CTLFLAG_RWTUN,
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&pimd_uid, 0, "User id for pimd user");
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static int
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pimd_priv_grant(struct ucred *cred, int priv)
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{
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if (pimd_enabled && cred->cr_uid == pimd_uid) {
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switch (priv) {
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case PRIV_NETINET_MROUTE:
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return (0);
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default:
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break;
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}
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}
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return (EPERM);
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}
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static struct mac_policy_ops pimd_ops =
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{
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.mpo_priv_grant = pimd_priv_grant,
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};
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MAC_POLICY_SET(&pimd_ops, mac_pimd, "MAC/pimd",
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MPC_LOADTIME_FLAG_UNLOADOK, NULL);
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