mirror of
https://github.com/cryb-to/cryb-to.git
synced 2024-11-23 14:15:44 +00:00
81 lines
2.5 KiB
C
81 lines
2.5 KiB
C
/*-
|
|
* Copyright (c) 2015-2018 The University of Oslo
|
|
* 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.
|
|
* 3. The name of the author may not be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
|
|
*/
|
|
|
|
#if HAVE_CONFIG_H
|
|
#include "config.h"
|
|
#endif
|
|
|
|
#include <errno.h>
|
|
#include <stdint.h>
|
|
#include <string.h>
|
|
|
|
#include <cryb/coverage.h>
|
|
#include <cryb/memcpy_s.h>
|
|
#include <cryb/memset_s.h>
|
|
|
|
/*
|
|
* Like memcpy(), but checks for overflow and overwrites the destination
|
|
* range with zeroes on error.
|
|
*
|
|
* ISO/IEC 9899:2011 K.3.7.1.1
|
|
*/
|
|
errno_t
|
|
cryb_memcpy_s(void * restrict d, rsize_t dsz, const void * restrict s,
|
|
rsize_t n)
|
|
{
|
|
volatile uint8_t *D;
|
|
const uint8_t *S;
|
|
unsigned int i;
|
|
|
|
/* unrecoverable errors */
|
|
if (d == NULL)
|
|
return (EINVAL);
|
|
CRYB_DISABLE_COVERAGE
|
|
if (dsz > RSIZE_MAX)
|
|
return (ERANGE);
|
|
CRYB_RESTORE_COVERAGE
|
|
/* recoverable errors */
|
|
if (s == NULL || n > dsz ||
|
|
CRYB_DISABLE_COVERAGE
|
|
n > RSIZE_MAX ||
|
|
CRYB_RESTORE_COVERAGE
|
|
(s >= d && s < d + dsz) || (d >= s && d < s + n)) {
|
|
memset_s(d, dsz, 0, dsz);
|
|
if (n > dsz)
|
|
return (EOVERFLOW);
|
|
CRYB_DISABLE_COVERAGE
|
|
if (n > RSIZE_MAX)
|
|
return (ERANGE);
|
|
CRYB_RESTORE_COVERAGE
|
|
return (EINVAL);
|
|
}
|
|
for (D = d, S = s, i = 0; i < dsz && i < n; ++i)
|
|
D[i] = S[i];
|
|
return (0);
|
|
}
|