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/**
******************************************************************************
* @file fe25519.h
* @author MCD Application Team
* @brief fe25519 header file
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2015 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under Image license SLA0044,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* http://www.st.com/SLA0044
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __FE25519_H__
#define __FE25519_H__
#ifdef __cplusplus
extern "C" {
#endif
/** @addtogroup FE25519 fe25519
* @brief Arithmetic in GF(2^255-19)
* @{
*/
/* Includes ------------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
typedef struct
{
uint32_t v[8]; /*!< uint32_t array representing the number in low endian format */
} fe25519; /*!< Representation of a number in GF(2^255-19) */
/* Exported constants --------------------------------------------------------*/
/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
void fe25519_freeze(fe25519 *r);
void fe25519_unpack(fe25519 *r, const uint8_t x[32]);
void fe25519_pack(uint8_t r[32], const fe25519 *x);
int32_t fe25519_iszero(const fe25519 *x);
int32_t fe25519_iseq_vartime(const fe25519 *x, const fe25519 *y);
void fe25519_cmov(fe25519 *r, const fe25519 *x, uint8_t b);
void fe25519_copy(fe25519 *r, const fe25519 *x);
void fe25519_setone(fe25519 *r);
void fe25519_setzero(fe25519 *r);
void fe25519_neg(fe25519 *r, const fe25519 *x);
uint8_t fe25519_getparity(const fe25519 *x);
void fe25519_add(fe25519 *r, const fe25519 *x, const fe25519 *y);
void fe25519_sub(fe25519 *r, const fe25519 *x, const fe25519 *y);
void fe25519_mul(fe25519 *r, const fe25519 *x, const fe25519 *y);
void fe25519_square(fe25519 *r, const fe25519 *x);
void fe25519_invert(fe25519 *r, const fe25519 *x);
void fe25519_pow2523(fe25519 *r, const fe25519 *x);
void fe25519_mult121665(fe25519 *r, const fe25519 *x);
/**
* @} fe25519
*/
#ifdef __cplusplus
}
#endif
#endif /* __FE25519_H__ */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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