/usr/include/isc/safe.h is in libbind-dev 1:9.11.3+dfsg-1ubuntu1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 | /*
* Copyright (C) 2013, 2015-2017 Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
/* $Id$ */
#ifndef ISC_SAFE_H
#define ISC_SAFE_H 1
/*! \file isc/safe.h */
#include <isc/types.h>
#include <stdlib.h>
ISC_LANG_BEGINDECLS
isc_boolean_t
isc_safe_memequal(const void *s1, const void *s2, size_t n);
/*%<
* Returns ISC_TRUE iff. two blocks of memory are equal, otherwise
* ISC_FALSE.
*
*/
int
isc_safe_memcompare(const void *b1, const void *b2, size_t len);
/*%<
* Clone of libc memcmp() which is safe to differential timing attacks.
*/
void
isc_safe_memwipe(void *ptr, size_t len);
/*%<
* Clear the memory of length `len` pointed to by `ptr`.
*
* Some crypto code calls memset() on stack allocated buffers just
* before return so that they are wiped. Such memset() calls can be
* optimized away by the compiler. We provide this external non-inline C
* function to perform the memset operation so that the compiler cannot
* infer about what the function does and optimize the call away.
*/
ISC_LANG_ENDDECLS
#endif /* ISC_SAFE_H */
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