82 lines
2.5 KiB
C
82 lines
2.5 KiB
C
/*
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* Copyright 2001 by Thomas Moestl. All rights reserved.
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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 ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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* USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* TrustedBSD implementation of cap_copy_ext()/cap_copy_int()
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*
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* These are largely nops currently, because our internal format is contiguous.
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* We just copy our representation out, and do some minumum validations on
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* external data.
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*
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* XXX: we cannot detect cap being invalid. If it is, the program will probably
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* segfault.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/capability.h>
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#include <errno.h>
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#include <stdlib.h>
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ssize_t
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cap_copy_ext(void *ext_p, cap_t cap, ssize_t size)
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{
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if (size < 0) {
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errno = EINVAL;
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return (-1);
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}
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if (size < sizeof(struct cap)) {
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errno = ERANGE;
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return (-1);
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}
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memcpy(ext_p, cap, sizeof(struct cap));
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return (sizeof(struct cap));
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}
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cap_t
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cap_copy_int(const void *ext_p)
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{
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cap_t c;
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/* We can use cap_dup here, because the format is the same */
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if ((c = cap_dup((cap_t)ext_p)) == NULL)
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return ((cap_t)NULL);
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/* Basic validation */
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if ((c->c_effective & ~CAP_ALL_ON) || (c->c_permitted & ~CAP_ALL_ON) ||
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(c->c_inheritable & ~CAP_ALL_ON)) {
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cap_free(c);
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errno = EINVAL;
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return ((cap_t)NULL);
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}
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return (c);
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}
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ssize_t
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cap_size(cap_t cap)
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{
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(void)cap; /* silence warning */
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return (sizeof(struct cap));
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}
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