/
githubmirror
/
postgres
Обзор
Документация
Войти
/
githubmirror
/
postgres
Код
Запросы
0
Пакеты
0
Релизы
0
Аналитика
Безопасность
master
src/port/timingsafe_bcmp.c
43 строки
1 KB
Heikki Linnakangas
Add timingsafe_bcmp(), for constant-time memory comparison
02 апр 2025, 15:32
02 апр 2025, 15:32
09be391
Код
Авторство
О чём код?
/* * src/port/timingsafe_bcmp.c * * $OpenBSD: timingsafe_bcmp.c,v 1.3 2015/08/31 02:53:57 guenther Exp $ */ /* * Copyright (c) 2010 Damien Miller. All rights reserved. * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "c.h" #ifdef USE_SSL #include <openssl/crypto.h> #endif int timingsafe_bcmp(const void *b1, const void *b2, size_t n) { #ifdef USE_SSL return CRYPTO_memcmp(b1, b2, n); #else const unsigned char *p1 = b1, *p2 = b2; int ret = 0; for (; n > 0; n--) ret |= *p1++ ^ *p2++; return (ret != 0); #endif }