42 lines
1.2 KiB
C
42 lines
1.2 KiB
C
/*
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* ISC License
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*
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* Copyright (c) 2013-2018
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* Frank Denis <j at pureftpd dot org>
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*
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* Permission to use, copy, modify, and/or 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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#include <sys/types.h>
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#include <sys/systm.h>
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#include <sodium/utils.h>
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void
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sodium_memzero(void *b, size_t n)
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{
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explicit_bzero(b, n);
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}
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int
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sodium_is_zero(const unsigned char *n, const size_t nlen)
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{
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size_t i;
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volatile unsigned char d = 0U;
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for (i = 0U; i < nlen; i++) {
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d |= n[i];
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}
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return 1 & ((d - 1) >> 8);
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}
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