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![Pawel Jakub Dawidek](/assets/img/avatar_default.png)
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
/*-
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* Copyright (c) 2013 The FreeBSD Foundation
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* All rights reserved.
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*
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* This software was developed by Pawel Jakub Dawidek under sponsorship from
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* the FreeBSD Foundation.
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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 AUTHORS 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 AUTHORS 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <assert.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <nv.h>
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#include "msgio.h"
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#include "libcapsicum.h"
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#include "libcapsicum_impl.h"
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#include "libcapsicum_service.h"
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cap_channel_t *
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cap_service_open(const cap_channel_t *chan, const char *name)
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{
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cap_channel_t *newchan;
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nvlist_t *nvl;
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int sock, error;
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sock = -1;
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nvl = nvlist_create(0);
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nvlist_add_string(nvl, "cmd", "open");
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nvlist_add_string(nvl, "service", name);
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if (fd_is_valid(STDERR_FILENO))
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nvlist_add_descriptor(nvl, "stderrfd", STDERR_FILENO);
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nvl = cap_xfer_nvlist(chan, nvl);
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if (nvl == NULL)
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return (NULL);
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error = (int)nvlist_get_number(nvl, "error");
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if (error != 0) {
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nvlist_destroy(nvl);
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errno = error;
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return (NULL);
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}
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sock = nvlist_take_descriptor(nvl, "chanfd");
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assert(sock >= 0);
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nvlist_destroy(nvl);
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nvl = NULL;
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if (cred_send(sock) == -1)
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goto fail;
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newchan = cap_wrap(sock);
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if (newchan == NULL)
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goto fail;
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return (newchan);
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fail:
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error = errno;
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close(sock);
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errno = error;
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return (NULL);
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}
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int
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cap_service_limit(const cap_channel_t *chan, const char * const *names,
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size_t nnames)
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{
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nvlist_t *limits;
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unsigned int i;
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limits = nvlist_create(0);
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for (i = 0; i < nnames; i++)
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nvlist_add_null(limits, names[i]);
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return (cap_limit_set(chan, limits));
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}
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