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/*
* Copyright 2001 by Thomas Moestl. All rights reserved.
*
* 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 ``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 REGENTS 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.
*/
/*
* TrustedBSD implementation of cap_copy_ext()/cap_copy_int()
*
* These are largely nops currently, because our internal format is contiguous.
* We just copy our representation out, and do some minumum validations on
* external data.
*
* XXX: we cannot detect cap being invalid. If it is, the program will probably
* segfault.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <sys/capability.h>
#include <errno.h>
#include <stdlib.h>
ssize_t
cap_copy_ext(void *ext_p, cap_t cap, ssize_t size)
{
if (size < 0) {
errno = EINVAL;
return (-1);
}
if (size < sizeof(struct cap)) {
errno = ERANGE;
return (-1);
}
memcpy(ext_p, cap, sizeof(struct cap));
return (sizeof(struct cap));
}
cap_t
cap_copy_int(const void *ext_p)
{
cap_t c;
/* We can use cap_dup here, because the format is the same */
if ((c = cap_dup((cap_t)ext_p)) == NULL)
return ((cap_t)NULL);
/* Basic validation */
if ((c->c_effective & ~CAP_ALL_ON) || (c->c_permitted & ~CAP_ALL_ON) ||
(c->c_inheritable & ~CAP_ALL_ON)) {
cap_free(c);
errno = EINVAL;
return ((cap_t)NULL);
}
return (c);
}
ssize_t
cap_size(cap_t cap)
{
(void)cap; /* silence warning */
return (sizeof(struct cap));
}
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