/*-
 * Copyright (c) 2017 Ribose Inc.
 * 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 HOLDERS 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 ECDSA_H_
#define ECDSA_H_

#include "crypto/ec.h"

rnp_result_t ecdsa_validate_key(rnp::RNG *rng, const pgp_ec_key_t *key, bool secret);

rnp_result_t ecdsa_sign(rnp::RNG *          rng,
                        pgp_ec_signature_t *sig,
                        pgp_hash_alg_t      hash_alg,
                        const uint8_t *     hash,
                        size_t              hash_len,
                        const pgp_ec_key_t *key);

rnp_result_t ecdsa_verify(const pgp_ec_signature_t *sig,
                          pgp_hash_alg_t            hash_alg,
                          const uint8_t *           hash,
                          size_t                    hash_len,
                          const pgp_ec_key_t *      key);

/*
 * @brief   Returns hash which should be used with the curve
 *
 * @param   curve Curve ID
 *
 * @returns  Either ID of the hash algorithm, or PGP_HASH_UNKNOWN
 *           if not found
 */
pgp_hash_alg_t ecdsa_get_min_hash(pgp_curve_t curve);

#endif // ECDSA_H_