mirror of https://github.com/sudo-project/sudo.git
78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/*
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* SPDX-License-Identifier: ISC
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*
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* Copyright (c) 2020 Todd C. Miller <Todd.Miller@sudo.ws>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/*
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* This is an open source non-commercial project. Dear PVS-Studio, please check it.
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* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
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*/
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#include <config.h>
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#define __STDC_WANT_LIB_EXT1__ 1 /* for memset_s() */
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#include <string.h>
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif /* HAVE_STRINGS_H */
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#include <sudo_compat.h>
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#ifndef HAVE_EXPLICIT_BZERO
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# if defined(HAVE_EXPLICIT_MEMSET)
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void
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sudo_explicit_bzero(void *s, size_t n)
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{
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explicit_memset(s, 0, n);
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}
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# elif defined(HAVE_MEMSET_EXPLICIT)
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void
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sudo_explicit_bzero(void *s, size_t n)
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{
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memset_explicit(s, 0, n);
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}
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# elif defined(HAVE_MEMSET_S)
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void
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sudo_explicit_bzero(void *s, size_t n)
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{
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(void)memset_s(s, n, 0, n);
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}
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# elif defined(HAVE_BZERO)
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/* Jumping through a volatile function pointer should not be optimized away. */
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void (* volatile sudo_explicit_bzero_impl)(void *, size_t) =
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(void (*)(void *, size_t))bzero;
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void
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sudo_explicit_bzero(void *s, size_t n)
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{
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sudo_explicit_bzero_impl(s, n);
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}
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# else
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void
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sudo_explicit_bzero(void *v, size_t n)
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{
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volatile unsigned char *s = v;
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/* Updating through a volatile pointer should not be optimized away. */
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while (n--)
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*s++ = 0;
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}
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# endif /* HAVE_BZERO */
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#endif /* HAVE_EXPLICIT_BZERO */
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