/*	$OpenBSD: sm2_local.h,v 1.2 2022/11/26 17:23:18 tb Exp $ */
/*
 * Copyright (c) 2017, 2019 Ribose Inc
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef HEADER_SM2_LOCAL_H
#define HEADER_SM2_LOCAL_H

#include <openssl/ec.h>
#include <openssl/ecdsa.h>

__BEGIN_HIDDEN_DECLS

int sm2_compute_userid_digest(uint8_t *out, const EVP_MD *digest,
	const uint8_t *uid, size_t uid_len, const EC_KEY *key);

/*
 * SM2 signature operation. Computes ZA (user id digest) and then signs
 * H(ZA || msg) using SM2
 */
ECDSA_SIG *sm2_do_sign(const EC_KEY *key, const EVP_MD *digest,
	const uint8_t *uid, size_t uid_len, const uint8_t *msg, size_t msg_len);

int sm2_do_verify(const EC_KEY *key, const EVP_MD *digest,
	const ECDSA_SIG *signature, const uint8_t *uid, size_t uid_len,
	const uint8_t *msg, size_t msg_len);

__END_HIDDEN_DECLS

#endif /* !HEADER_SM2_LOCAL_H */