text: /*
   * Copyright 2020 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.openssl.org/source/license.html
   */
  
  #include <openssl/core_numbers.h>
  #include <openssl/pem.h>
  #include <openssl/ec.h>
  #include <openssl/types.h>
  #include <openssl/params.h>
  #include "prov/bio.h"
  #include "prov/implementations.h"
  #include "prov/providercommonerr.h"
  #include "prov/provider_ctx.h"
  #include "serializer_local.h"
  
  static OSSL_OP_serializer_newctx_fn ec_param_newctx;
  static OSSL_OP_serializer_freectx_fn ec_param_freectx;
  static OSSL_OP_serializer_serialize_data_fn ec_param_der_data;
  static OSSL_OP_serializer_serialize_object_fn ec_param_der;
  static OSSL_OP_serializer_serialize_data_fn ec_param_pem_data;
  static OSSL_OP_serializer_serialize_object_fn ec_param_pem;
  
  static OSSL_OP_serializer_serialize_data_fn ec_param_print_data;
  static OSSL_OP_serializer_serialize_object_fn ec_param_print;
  
  
  /* There is no specific implementation context, so use the provider context */
  static void *ec_param_newctx(void *provctx)
  {
      return provctx;
  }
  
  static void ec_param_freectx(void *vctx)
  {
  }
  
  /* Public key : DER */
  static int ec_param_der_data(void *vctx, const OSSL_PARAM params[],
                               OSSL_CORE_BIO *out,
                               OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      OSSL_OP_keymgmt_new_fn *ec_new;
      OSSL_OP_keymgmt_free_fn *ec_free;
      OSSL_OP_keymgmt_import_fn *ec_import;
      int ok = 0;
  
      ec_get_new_free_import(&ec_new, &ec_free, &ec_import);
  
      if (ec_import != NULL) {
          EC_KEY *eckey;
  
          /* vctx == provctx */
          if ((eckey = ec_new(vctx)) != NULL
              && ec_import(eckey, OSSL_KEYMGMT_SELECT_ALL_PARAMETERS, params)
              && ec_param_der(vctx, eckey, out, cb, cbarg))
              ok = 1;
          ec_free(eckey);
      }
      return ok;
  }
  
  static int ec_param_der(void *vctx, void *eckey, OSSL_CORE_BIO *cout,
                           OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      BIO *out = bio_new_from_core_bio(vctx, cout);
      int ret;
  
      if (out == NULL)
          return 0;
  
      ret = i2d_ECPKParameters_bio(out, EC_KEY_get0_group(eckey));
      BIO_free(out);
  
      return ret;
  }
  
  /* Public key : PEM */
  static int ec_param_pem_data(void *vctx, const OSSL_PARAM params[],
                               OSSL_CORE_BIO *out,
                               OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      OSSL_OP_keymgmt_new_fn *ec_new;
      OSSL_OP_keymgmt_free_fn *ec_free;
      OSSL_OP_keymgmt_import_fn *ec_import;
      int ok = 0;
  
      ec_get_new_free_import(&ec_new, &ec_free, &ec_import);
  
      if (ec_import != NULL) {
          EC_KEY *eckey;
  
          /* vctx == provctx */
          if ((eckey = ec_new(vctx)) != NULL
              && ec_import(eckey, OSSL_KEYMGMT_SELECT_ALL_PARAMETERS, params)
              && ec_param_pem(vctx, eckey, out, cb, cbarg))
              ok = 1;
          ec_free(eckey);
      }
      return ok;
  }
  
  static int ec_param_pem(void *vctx, void *eckey, OSSL_CORE_BIO *cout,
                           OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      BIO *out = bio_new_from_core_bio(vctx, cout);
      int ret;
  
      if (out == NULL)
          return 0;
  
      ret = PEM_write_bio_ECPKParameters(out, EC_KEY_get0_group(eckey));
      BIO_free(out);
  
      return ret;
  }
  
  static int ec_param_print_data(void *vctx, const OSSL_PARAM params[],
                                 OSSL_CORE_BIO *out,
                                 OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      OSSL_OP_keymgmt_new_fn *ec_new;
      OSSL_OP_keymgmt_free_fn *ec_free;
      OSSL_OP_keymgmt_import_fn *ec_import;
      int ok = 0;
  
      ec_get_new_free_import(&ec_new, &ec_free, &ec_import);
  
      if (ec_import != NULL) {
          EC_KEY *eckey;
  
          /* vctx == provctx */
          if ((eckey = ec_new(vctx)) != NULL
              && ec_import(eckey, OSSL_KEYMGMT_SELECT_ALL_PARAMETERS, params)
              && ec_param_print(vctx, eckey, out, cb, cbarg))
              ok = 1;
          ec_free(eckey);
      }
      return ok;
  }
  
  static int ec_param_print(void *vctx, void *eckey, OSSL_CORE_BIO *cout,
                             OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      BIO *out = bio_new_from_core_bio(vctx, cout);
      int ret;
  
      if (out == NULL)
          return 0;
  
      ret = ossl_prov_print_eckey(out, eckey, ec_print_params);
      BIO_free(out);
  
      return ret;
  }
  
  const OSSL_DISPATCH ec_param_der_serializer_functions[] = {
      { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))ec_param_newctx },
      { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))ec_param_freectx },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))ec_param_der_data },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))ec_param_der },
      { 0, NULL }
  };
  
  const OSSL_DISPATCH ec_param_pem_serializer_functions[] = {
      { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))ec_param_newctx },
      { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))ec_param_freectx },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))ec_param_pem_data },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))ec_param_pem },
      { 0, NULL }
  };
  
  const OSSL_DISPATCH ec_param_text_serializer_functions[] = {
      { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))ec_param_newctx },
      { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))ec_param_freectx },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))ec_param_print },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA,
        (void (*)(void))ec_param_print_data },
      { 0, NULL }
  };
  