228 lines
9.1 KiB
C
228 lines
9.1 KiB
C
/*
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* Original file:
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* Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com/
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* All rights reserved.
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*
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* Port to Contiki:
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* Copyright (c) 2014 Andreas Dröscher <contiki@anticat.ch>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* \addtogroup cc2538-pka
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* @{
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*
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* \defgroup cc2538-ecc cc2538 ECC driver
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*
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* Driver for the cc2538 ECC mode of the PKC engine
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* @{
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*
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* \file
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* Header file for the cc2538 ECC driver
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*/
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#ifndef ECC_DRIVER_H_
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#define ECC_DRIVER_H_
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#include "contiki.h"
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#include "dev/pka.h"
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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/** \name ECC structures
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* @{
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*/
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typedef struct {
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const char *name; /**< Name of the curve. */
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const uint8_t size; /**< Size of the curve in 32-bit word. */
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const uint32_t *prime; /**< The prime that defines the field of the curve. */
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const uint32_t *n; /**< Order of the curve. */
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const uint32_t *a; /**< Co-efficient a of the equation. */
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const uint32_t *b; /**< co-efficient b of the equation. */
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const uint32_t *x; /**< x co-ordinate value of the generator point. */
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const uint32_t *y; /**< y co-ordinate value of the generator point. */
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} ecc_curve_info_t;
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typedef struct {
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uint32_t x[12]; /**< Pointer to value of the x co-ordinate. */
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uint32_t y[12]; /**< Pointer to value of the y co-ordinate. */
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} ec_point_t;
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/** @} */
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/*---------------------------------------------------------------------------*/
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/** \name ECC functions
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* \note Not all sequencer functions are implemented in this driver
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* look at the CC2538 manual for a complete list.
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* @{
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*/
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/** \brief Starts ECC Multiplication.
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*
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* \param scalar Pointer to the buffer containing the scalar
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* value to be multiplied.
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* \param ec_point Pointer to the structure containing the
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* elliptic curve point to be multiplied. The point should be
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* on the given curve.
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* \param curve Pointer to the structure containing the curve
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* info.
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* \param result_vector Pointer to the result vector location
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* which will be set by this function.
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* \param process Process to be polled upon completion of the
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* operation, or \c NULL
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*
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* This function starts the Elliptical curve cryptography (ECC) point
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* multiplication operation on the EC point and the scalar value.
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*
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* \retval PKA_STATUS_SUCCESS if successful in starting the operation.
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* \retval PKA_STATUS_OPERATION_INPRG if the PKA hw module is busy doing
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* some other operation.
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*/
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uint8_t ecc_mul_start(uint32_t *scalar,
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ec_point_t *ec_point,
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ecc_curve_info_t *curve,
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uint32_t *result_vector,
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struct process *process);
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/** \brief Gets the result of ECC Multiplication
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*
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* \param ec_point Pointer to the structure where the resultant EC
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* point will be stored. The callee is responsible to allocate the
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* space for the ec point structure and the x and y co-ordinate as well.
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* \param result_vector Address of the result location which
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* was provided by the start function \sa PKAECCMultiplyStart().
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*
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* This function gets the result of ecc point multiplication operation on the
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* ec point and the scalar value, previously started using the function
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* \sa PKAECCMultiplyStart().
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*
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* \retval PKA_STATUS_SUCCESS if the operation is successful.
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* \retval PKA_STATUS_OPERATION_INPRG if the PKA hw module is busy performing
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* the operation.
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* \retval PKA_STATUS_RESULT_0 if the result is all zeroes.
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* \retval PKA_STATUS_FAILURE if the operation is not successful.
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*/
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uint8_t ecc_mul_get_result(ec_point_t *ec_point,
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uint32_t result_vector);
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/** \brief Starts the ECC Multiplication with Generator point.
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*
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* \param scalar Pointer to the buffer containing the
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* scalar value.
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* \param curve Pointer to the structure containing the curve
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* info.
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* \param result_vector Pointer to the result vector location
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* which will be set by this function.
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* \param process Process to be polled upon completion of the
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* operation, or \c NULL
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*
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* This function starts the ecc point multiplication operation of the
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* scalar value with the well known generator point of the given curve.
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*
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* \retval PKA_STATUS_SUCCESS if successful in starting the operation.
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* \retval PKA_STATUS_OPERATION_INPRG if the PKA hw module is busy doing
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* some other operation.
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*/
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uint8_t ecc_mul_gen_pt_start(uint32_t *scalar,
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ecc_curve_info_t *curve,
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uint32_t *result_vector,
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struct process *process);
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/** \brief Gets the result of ECC Multiplication with Generator point.
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*
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* \param ec_point Pointer to the structure where the resultant EC
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* point will be stored. The callee is responsible to allocate the
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* space for the ec point structure and the x and y co-ordinate as well.
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* \param result_vector Address of the result location which
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* was provided by the start function \sa PKAECCMultGenPtStart().
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*
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* This function gets the result of ecc point multiplication operation on the
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* scalar point and the known generator point on the curve, previously started
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* using the function \sa PKAECCMultGenPtStart().
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*
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* \retval PKA_STATUS_SUCCESS if the operation is successful.
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* \retval PKA_STATUS_OPERATION_INPRG if the PKA hw module is busy performing
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* the operation.
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* \retval PKA_STATUS_RESULT_0 if the result is all zeroes.
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* \retval PKA_STATUS_FAILURE if the operation is not successful.
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*/
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uint8_t ecc_mul_gen_pt_get_result(ec_point_t *ec_point,
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uint32_t result_vector);
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/** \brief Starts the ECC Addition.
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*
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* \param ec_point1 Pointer to the structure containing the first
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* ecc point.
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* \param ec_point2 Pointer to the structure containing the
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* second ecc point.
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* \param curve Pointer to the structure containing the curve
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* info.
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* \param result_vector Pointer to the result vector location
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* which will be set by this function.
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* \param process Process to be polled upon completion of the
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* operation, or \c NULL
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*
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* This function starts the ecc point addition operation on the
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* two given ec points and generates the resultant ecc point.
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*
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* \retval PKA_STATUS_SUCCESS if successful in starting the operation.
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* \retval PKA_STATUS_OPERATION_INPRG if the PKA hw module is busy doing
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* some other operation.
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*/
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uint8_t ecc_add_start(ec_point_t *ec_point1, ec_point_t *ec_point2,
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ecc_curve_info_t *curve,
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uint32_t *result_vector,
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struct process *process);
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/** \brief Gets the result of the ECC Addition
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*
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* \param ptOutEcPt Pointer to the structure where the resultant
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* point will be stored. The callee is responsible to allocate memory,
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* for the ec point structure including the memory for x and y
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* co-ordinate values.
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* \param ui32ResultLoc Address of the result location which
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* was provided by the function \sa PKAECCAddStart().
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*
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* This function gets the result of ecc point addition operation on the
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* on the two given ec points, previously started using the function \sa
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* PKAECCAddStart().
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*
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* \retval PKA_STATUS_SUCCESS if the operation is successful.
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* \retval PKA_STATUS_OPERATION_INPRG if the PKA hw module is busy performing
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* the operation.
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* \retval PKA_STATUS_RESULT_0 if the result is all zeroes.
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* \retval PKA_STATUS_FAILURE if the operation is not successful.
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*/
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uint8_t ecc_add_get_result(ec_point_t *ptOutEcPt, uint32_t ui32ResultLoc);
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/** @} */
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#endif /* ECC_DRIVER_H_ */
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/**
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* @}
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* @}
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*/
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