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
81 lines
2.4 KiB
C
81 lines
2.4 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 <nv.h>
|
|
|
|
#include "libcapsicum.h"
|
|
#include "libcapsicum_random.h"
|
|
|
|
#define MAXSIZE (1024 * 1024)
|
|
|
|
int
|
|
cap_random_buf(cap_channel_t *chan, void *buf, size_t nbytes)
|
|
{
|
|
nvlist_t *nvl;
|
|
const void *randbuf;
|
|
uint8_t *ptr;
|
|
size_t left, randbufsize;
|
|
|
|
left = nbytes;
|
|
ptr = buf;
|
|
|
|
while (left > 0) {
|
|
nvl = nvlist_create(0);
|
|
nvlist_add_string(nvl, "cmd", "generate");
|
|
nvlist_add_number(nvl, "size",
|
|
(uint64_t)(left > MAXSIZE ? MAXSIZE : left));
|
|
nvl = cap_xfer_nvlist(chan, nvl);
|
|
if (nvl == NULL)
|
|
return (-1);
|
|
if (nvlist_get_number(nvl, "error") != 0) {
|
|
errno = (int)nvlist_get_number(nvl, "error");
|
|
nvlist_destroy(nvl);
|
|
return (-1);
|
|
}
|
|
|
|
randbuf = nvlist_get_binary(nvl, "data", &randbufsize);
|
|
memcpy(ptr, randbuf, randbufsize);
|
|
|
|
nvlist_destroy(nvl);
|
|
|
|
ptr += randbufsize;
|
|
assert(left >= randbufsize);
|
|
left -= randbufsize;
|
|
}
|
|
|
|
return (0);
|
|
}
|