mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-11-26 19:03:48 +01:00
42a8595256
giving access to functionality that is not available in capability mode sandbox. The functionality can be precisely restricted. Start with the following services: - system.dns - provides API compatible to: - gethostbyname(3), - gethostbyname2(3), - gethostbyaddr(3), - getaddrinfo(3), - getnameinfo(3), - system.grp - provides getgrent(3)-compatible API, - system.pwd - provides getpwent(3)-compatible API, - system.random - allows to obtain entropy from /dev/random, - system.sysctl - provides sysctlbyname(3-compatible API. Sponsored by: The FreeBSD Foundation
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/*-
|
|
* Copyright (c) 2013 The FreeBSD Foundation
|
|
* All rights reserved.
|
|
*
|
|
* This software was developed by Pawel Jakub Dawidek under sponsorship from
|
|
* the FreeBSD Foundation.
|
|
*
|
|
* 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 AUTHORS 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 AUTHORS 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/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
|
|
#include <nv.h>
|
|
#include "msgio.h"
|
|
|
|
#include "libcapsicum.h"
|
|
#include "libcapsicum_impl.h"
|
|
#include "libcapsicum_service.h"
|
|
|
|
cap_channel_t *
|
|
cap_service_open(const cap_channel_t *chan, const char *name)
|
|
{
|
|
cap_channel_t *newchan;
|
|
nvlist_t *nvl;
|
|
int sock, error;
|
|
|
|
sock = -1;
|
|
|
|
nvl = nvlist_create(0);
|
|
nvlist_add_string(nvl, "cmd", "open");
|
|
nvlist_add_string(nvl, "service", name);
|
|
if (fd_is_valid(STDERR_FILENO))
|
|
nvlist_add_descriptor(nvl, "stderrfd", STDERR_FILENO);
|
|
nvl = cap_xfer_nvlist(chan, nvl);
|
|
if (nvl == NULL)
|
|
return (NULL);
|
|
error = (int)nvlist_get_number(nvl, "error");
|
|
if (error != 0) {
|
|
nvlist_destroy(nvl);
|
|
errno = error;
|
|
return (NULL);
|
|
}
|
|
sock = nvlist_take_descriptor(nvl, "chanfd");
|
|
assert(sock >= 0);
|
|
nvlist_destroy(nvl);
|
|
nvl = NULL;
|
|
if (cred_send(sock) == -1)
|
|
goto fail;
|
|
newchan = cap_wrap(sock);
|
|
if (newchan == NULL)
|
|
goto fail;
|
|
return (newchan);
|
|
fail:
|
|
error = errno;
|
|
close(sock);
|
|
errno = error;
|
|
return (NULL);
|
|
}
|
|
|
|
int
|
|
cap_service_limit(const cap_channel_t *chan, const char * const *names,
|
|
size_t nnames)
|
|
{
|
|
nvlist_t *limits;
|
|
unsigned int i;
|
|
|
|
limits = nvlist_create(0);
|
|
for (i = 0; i < nnames; i++)
|
|
nvlist_add_null(limits, names[i]);
|
|
return (cap_limit_set(chan, limits));
|
|
}
|