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/**
******************************************************************************
* @file elliptic.h
* @author MCD Application Team
* @brief Provides Elliptic Curve Cryptography (ECC) primitives.
******************************************************************************
* @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 __CRL_ELLIPTIC_H__
#define __CRL_ELLIPTIC_H__
#ifdef __cplusplus
extern "C"
{
#endif
/** @addtogroup ECClowlevel
* @{
*/
/* Exported types ------------------------------------------------------------*/
/* Note:
* Elliptic curve equation over GF(p): y^2 = x^3+ax+b.
* All the NIST elliptic curves have a=-3 for performance reasons.
* The point number for an elliptic curve is given by n*h where
* h is the co-factor; it's usual for standard curves h=1.
* n is always a prime number and represents the curve order.
*/
/* Exported functions ------------------------------------------------------- */
/* Computes the symmetric of the point P_Point ********************************/
int32_t ECCsymmetricPoint(const ECpoint_stt *P_pECpnt,
ECpoint_stt *P_pECsymmetricPnt,
const EC_stt *P_pECctx,
membuf_stt *P_pMemBuf);
/* PA=normalized PP. **********************************************************/
int32_t Normalize(const ECpoint_stt *P_pECinputPnt,
ECpoint_stt *P_pECnormPnt,
const montyParams_stt* P_pMontyParams);
/* Converts the x coordinates from integers modulo p to the Montgomery domain */
int32_t ECCpoint2Monty(ECpoint_stt *P_pECpnt, const montyParams_stt *P_pMontyParams);
/* Converts the x coordinates from the Montgomery domain to integers modulo p */
int32_t ECCpointFromMonty(ECpoint_stt *P_pECpnt, const montyParams_stt *P_pMontyParams);
/* Point addition in Jacobian Projective coordinates and in the Montgomery domain. */
int32_t MontyJacProjAddPoints(const ECpoint_stt *P_pECpnt1,
const ECpoint_stt *P_pECpnt2,
ECpoint_stt *P_pECpntSum,
const EC_stt *P_pECctx,
const montyParams_stt *P_pMontyParams);
/* Point doubling in Jacobian Projective coordinates and in the Montgomery domain. P2=2*P1*/
int32_t MontyJacProjDoublePoint(const ECpoint_stt *P_pECpnt,
ECpoint_stt *P_pECpntDoubled,
const EC_stt *P_pECctx,
const montyParams_stt *P_pMontyParams);
int32_t NAF_Binary_PointMul(const BigNum_stt *P_pBNk,
const ECpoint_stt * P_pECbasePnt,
ECpoint_stt * P_pECresultPnt,
const EC_stt *P_pECctx,
const montyParams_stt *P_pMontyParams);
int32_t Binary_DoublePointMul(const BigNum_stt *P_pBNk1,
ECpoint_stt * P_pECbase1Pnt,
const BigNum_stt *P_pBNk2,
const ECpoint_stt * P_pECbase2Pnt,
ECpoint_stt * P_pECresultPnt,
const EC_stt *P_pECctx,
const montyParams_stt *P_pMontyParams);
#ifdef __cplusplus
}
#endif
#endif /*__CRL_ELLIPTIC_H__ */
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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