text: /*
   * Copyright 2019-2020 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
   */
  
  /*
   * DH low level APIs are deprecated for public use, but still ok for
   * internal use.
   */
  #include "internal/deprecated.h"
  
  #include <openssl/core_numbers.h>
  #include <openssl/err.h>
  #include <openssl/pem.h>
  #include <openssl/dh.h>
  #include <openssl/types.h>
  #include <openssl/params.h>
  #include "prov/bio.h"
  #include "prov/implementations.h"
  #include "serializer_local.h"
  
  static OSSL_OP_serializer_newctx_fn dh_pub_newctx;
  static OSSL_OP_serializer_freectx_fn dh_pub_freectx;
  static OSSL_OP_serializer_serialize_data_fn dh_pub_der_data;
  static OSSL_OP_serializer_serialize_object_fn dh_pub_der;
  static OSSL_OP_serializer_serialize_data_fn dh_pub_pem_data;
  static OSSL_OP_serializer_serialize_object_fn dh_pub_pem;
  
  static OSSL_OP_serializer_serialize_data_fn dh_pub_print_data;
  static OSSL_OP_serializer_serialize_object_fn dh_pub_print;
  
  /* Public key : context */
  
  /*
   * There's no specific implementation context, so we use the provider context
   */
  static void *dh_pub_newctx(void *provctx)
  {
      return provctx;
  }
  
  static void dh_pub_freectx(void *ctx)
  {
  }
  
  /* Public key : DER */
  static int dh_pub_der_data(void *ctx, const OSSL_PARAM params[], BIO *out,
                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      OSSL_OP_keymgmt_new_fn *dh_new = ossl_prov_get_keymgmt_dh_new();
      OSSL_OP_keymgmt_free_fn *dh_free = ossl_prov_get_keymgmt_dh_free();
      OSSL_OP_keymgmt_import_fn *dh_import = ossl_prov_get_keymgmt_dh_import();
      int ok = 0;
  
      if (dh_import != NULL) {
          DH *dh;
  
          /* ctx == provctx */
          if ((dh = dh_new(ctx)) != NULL
              && dh_import(dh, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
              && dh_pub_der(ctx, dh, out, cb, cbarg))
              ok = 1;
          dh_free(dh);
      }
      return ok;
  }
  
  static int dh_pub_der(void *ctx, void *dh, BIO *out,
                         OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      return ossl_prov_write_pub_der_from_obj(out, dh, EVP_PKEY_DH,
                                              ossl_prov_prepare_dh_params,
                                              ossl_prov_dh_pub_to_der);
  }
  
  /* Public key : PEM */
  static int dh_pub_pem_data(void *ctx, const OSSL_PARAM params[], BIO *out,
                              OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      OSSL_OP_keymgmt_new_fn *dh_new = ossl_prov_get_keymgmt_dh_new();
      OSSL_OP_keymgmt_free_fn *dh_free = ossl_prov_get_keymgmt_dh_free();
      OSSL_OP_keymgmt_import_fn *dh_import = ossl_prov_get_keymgmt_dh_import();
      int ok = 0;
  
      if (dh_import != NULL) {
          DH *dh;
  
          /* ctx == provctx */
          if ((dh = dh_new(ctx)) != NULL
              && dh_import(dh, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
              && dh_pub_pem(ctx, dh, out, cb, cbarg))
              ok = 1;
          dh_free(dh);
      }
      return ok;
  }
  
  static int dh_pub_pem(void *ctx, void *dh, BIO *out,
                         OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      return ossl_prov_write_pub_pem_from_obj(out, dh, EVP_PKEY_DH,
                                              ossl_prov_prepare_dh_params,
                                              ossl_prov_dh_pub_to_der);
  
  }
  
  static int dh_pub_print_data(void *ctx, const OSSL_PARAM params[], BIO *out,
                                OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      OSSL_OP_keymgmt_new_fn *dh_new = ossl_prov_get_keymgmt_dh_new();
      OSSL_OP_keymgmt_free_fn *dh_free = ossl_prov_get_keymgmt_dh_free();
      OSSL_OP_keymgmt_import_fn *dh_import = ossl_prov_get_keymgmt_dh_import();
      int ok = 0;
  
      if (dh_import != NULL) {
          DH *dh;
  
          /* ctx == provctx */
          if ((dh = dh_new(ctx)) != NULL
              && dh_import(dh, OSSL_KEYMGMT_SELECT_KEYPAIR, params)
              && dh_pub_print(ctx, dh, out, cb, cbarg))
              ok = 1;
          dh_free(dh);
      }
      return ok;
  }
  
  static int dh_pub_print(void *ctx, void *dh, BIO *out,
                           OSSL_PASSPHRASE_CALLBACK *cb, void *cbarg)
  {
      return ossl_prov_print_dh(out, dh, dh_print_pub);
  }
  
  const OSSL_DISPATCH dh_pub_der_serializer_functions[] = {
      { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dh_pub_newctx },
      { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dh_pub_freectx },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))dh_pub_der_data },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dh_pub_der },
      { 0, NULL }
  };
  
  const OSSL_DISPATCH dh_pub_pem_serializer_functions[] = {
      { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dh_pub_newctx },
      { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dh_pub_freectx },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA, (void (*)(void))dh_pub_pem_data },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dh_pub_pem },
      { 0, NULL }
  };
  
  const OSSL_DISPATCH dh_pub_text_serializer_functions[] = {
      { OSSL_FUNC_SERIALIZER_NEWCTX, (void (*)(void))dh_pub_newctx },
      { OSSL_FUNC_SERIALIZER_FREECTX, (void (*)(void))dh_pub_freectx },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_OBJECT, (void (*)(void))dh_pub_print },
      { OSSL_FUNC_SERIALIZER_SERIALIZE_DATA,
        (void (*)(void))dh_pub_print_data },
      { 0, NULL }
  };
  