ocrypto_constant_time.h

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/*
 * Copyright (c) 2016 - 2025 Nordic Semiconductor ASA
 * Copyright (c) since 2013 Oberon microsystems AG
 *
 * SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
 */
 
 
#ifndef OCRYPTO_CONSTANT_TIME_H
#define OCRYPTO_CONSTANT_TIME_H
 
#include <stddef.h>
#include <string.h>
 
 
#ifdef __cplusplus
extern "C" {
#endif
 
 
int ocrypto_constant_time_equal(const void *x, const void *y, size_t length);
 
int ocrypto_constant_time_is_zero(const void *x, size_t length);
 
// void ocrypto_constant_time_copy(void *x, const void *y, size_t length);
#define ocrypto_constant_time_copy(x, y, length) memcpy(x, y, length)
 
// void ocrypto_constant_time_fill_zero(void *x, size_t length);
#define ocrypto_constant_time_fill_zero(x, length) memset(x, 0, length)
 
// void ocrypto_constant_time_fill(void *x, uint8_t val, size_t length);
#define ocrypto_constant_time_fill(x, val, length) memset(x, val, length)
 
void ocrypto_constant_time_xor(void *r, const void *x, const void *y, size_t length);
 
#ifdef __cplusplus
}
#endif
 
#endif