mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
96 lines
3.2 KiB
C
96 lines
3.2 KiB
C
/* utils.h - TinyCrypt interface to platform-dependent run-time operations */
|
|
|
|
/*
|
|
* Copyright (C) 2017 by Intel Corporation, All Rights Reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright notice,
|
|
* this list of conditions and the following disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* - Neither the name of Intel Corporation nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
|
|
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* @brief Interface to platform-dependent run-time operations.
|
|
*
|
|
*/
|
|
|
|
#ifndef __TC_UTILS_H__
|
|
#define __TC_UTILS_H__
|
|
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/**
|
|
* @brief Copy the the buffer 'from' to the buffer 'to'.
|
|
* @return returns TC_CRYPTO_SUCCESS (1)
|
|
* returns TC_CRYPTO_FAIL (0) if:
|
|
* from_len > to_len.
|
|
*
|
|
* @param to OUT -- destination buffer
|
|
* @param to_len IN -- length of destination buffer
|
|
* @param from IN -- origin buffer
|
|
* @param from_len IN -- length of origin buffer
|
|
*/
|
|
unsigned int _copy(uint8_t *to, unsigned int to_len,
|
|
const uint8_t *from, unsigned int from_len);
|
|
|
|
/**
|
|
* @brief Set the value 'val' into the buffer 'to', 'len' times.
|
|
*
|
|
* @param to OUT -- destination buffer
|
|
* @param val IN -- value to be set in 'to'
|
|
* @param len IN -- number of times the value will be copied
|
|
*/
|
|
void _set(void *to, uint8_t val, unsigned int len);
|
|
|
|
/*
|
|
* @brief AES specific doubling function, which utilizes
|
|
* the finite field used by AES.
|
|
* @return Returns a^2
|
|
*
|
|
* @param a IN/OUT -- value to be doubled
|
|
*/
|
|
uint8_t _double_byte(uint8_t a);
|
|
|
|
/*
|
|
* @brief Constant-time algorithm to compare if two sequences of bytes are equal
|
|
* @return Returns 0 if equal, and non-zero otherwise
|
|
*
|
|
* @param a IN -- sequence of bytes a
|
|
* @param b IN -- sequence of bytes b
|
|
* @param size IN -- size of sequences a and b
|
|
*/
|
|
int _compare(const uint8_t *a, const uint8_t *b, size_t size);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* __TC_UTILS_H__ */
|