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/*
* Copyright (C) 2017-2024 Alibaba Group Holding Limited
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/******************************************************************************
* @file drv/ecdh.h
* @brief Header File for ECDH Driver
* @version V1.0
* @date 9. May 2023
* @model ecdh
******************************************************************************/
#ifndef _DRV_ECDH_H_
#define _DRV_ECDH_H_
#include <drv/common.h>
#include <drv/ecdsa.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
\brief ECDH Ctrl Block
*/
typedef struct {
csi_dev_t dev;
void *priv;
} csi_ecdh_t;
/**
\brief Initialize ECDH interface. Initializes the resources needed for the ECDH interface
\param[in] ecdh Handle to operate
\param[in] idx Device id
\return Error code \ref csi_error_t
*/
csi_error_t csi_ecdh_init(csi_ecdh_t *ecdh, uint32_t idx);
/**
\brief De-initialize ECDH interface. Stops operation and releases the software resources used by the interface
\param[in] ecdh Dandle to operate
\return None
*/
void csi_ecdh_uninit(csi_ecdh_t *ecdh);
/**
\brief Load curve param to engin
\param[in] ecdh Handle to operate
\param[in] type Pointer to \ref csi_curve_type_t
\return Error code \ref csi_error_t
*/
csi_error_t csi_ecdh_load_curve(csi_ecdh_t *ecdh, csi_curve_type_t type);
/**
\brief ECDH generate key pair
\param[in] ecdh Handle to operate
\param[out] prikey Pointer to the private key buf
\param[out] pubkey Pointer to the public key buf
\return Error code \ref Csi_error_t
*/
csi_error_t csi_ecdh_gen_keypair(csi_ecdh_t *ecdh, uint8_t *prikey, uint8_t *pubkey);
/**
\brief ECDH generate secret key
\param[in] ecdh Handle to operate
\param[in] prikey Pointer to the private key buf
\param[in] pubkey Pointer to the public key buf
\param[out] sk Pointer to the secret key buf
\param[out] sk_len The secret key length
\return Error code \ref Csi_error_t
*/
csi_error_t csi_ecdh_calc_secret(csi_ecdh_t *ecdh, const uint8_t *privkey, const uint8_t *pubkey, uint8_t *sk, uint32_t *sk_len);
#ifdef __cplusplus
}
#endif
#endif /* _DRV_ECDH_H_ */
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