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/*
* Copyright (c) 2021, [Ribose Inc](https://www.ribose.com).
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 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.
*/
#ifndef ECDH_UTILS_H_
#define ECDH_UTILS_H_
#include "ecdh.h"
#define MAX_SP800_56A_OTHER_INFO 56
// Keys up to 312 bits (+1 bytes of PKCS5 padding)
#define MAX_SESSION_KEY_SIZE 40
#define MAX_AES_KEY_SIZE 32
size_t kdf_other_info_serialize(uint8_t other_info[MAX_SP800_56A_OTHER_INFO],
const ec_curve_desc_t * ec_curve,
const pgp_fingerprint_t &fingerprint,
const pgp_hash_alg_t kdf_hash,
const pgp_symm_alg_t wrap_alg);
bool pad_pkcs7(uint8_t *buf, size_t buf_len, size_t offset);
bool unpad_pkcs7(uint8_t *buf, size_t buf_len, size_t *offset);
#endif // ECDH_UTILS_H_
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