text: /*-
   * 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 RNP_SM2_H_
  #define RNP_SM2_H_
  
  #include "config.h"
  #include "ec.h"
  
  typedef struct pgp_sm2_encrypted_t {
      pgp_mpi_t m;
  } pgp_sm2_encrypted_t;
  
  #if defined(ENABLE_SM2)
  rnp_result_t sm2_validate_key(rng_t *rng, const pgp_ec_key_t *key, bool secret);
  
  /**
   * Compute the SM2 "ZA" field, and add it to the hash object
   *
   * If ident_field is null, uses the default value
   */
  rnp_result_t sm2_compute_za(const pgp_ec_key_t *key,
                              pgp_hash_t *        hash,
                              const char *        ident_field = NULL);
  
  rnp_result_t sm2_sign(rng_t *             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 sm2_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);
  
  rnp_result_t sm2_encrypt(rng_t *              rng,
                           pgp_sm2_encrypted_t *out,
                           const uint8_t *      in,
                           size_t               in_len,
                           pgp_hash_alg_t       hash_algo,
                           const pgp_ec_key_t * key);
  
  rnp_result_t sm2_decrypt(uint8_t *                  out,
                           size_t *                   out_len,
                           const pgp_sm2_encrypted_t *in,
                           const pgp_ec_key_t *       key);
  #endif // defined(ENABLE_SM2)
  
  #endif // SM2_H_
  