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
   */
  
  /*
   * Key Management utility functions to share functionality between the export()
   * and get_params() methods.
   * export() uses OSSL_PARAM_BLD, and get_params() used the OSSL_PARAM[] to
   * fill in parameter data for the same key and data fields.
   */
  
  #include <openssl/core_names.h>
  #include "internal/param_build_set.h"
  
  DEFINE_SPECIAL_STACK_OF_CONST(BIGNUM_const, BIGNUM)
  
  int ossl_param_build_set_int(OSSL_PARAM_BLD *bld, OSSL_PARAM *p,
                               const char *key, int num)
  {
      if (bld != NULL)
          return OSSL_PARAM_BLD_push_int(bld, key, num);
      p = OSSL_PARAM_locate(p, key);
      if (p != NULL)
          return OSSL_PARAM_set_int(p, num);
      return 1;
  }
  
  int ossl_param_build_set_utf8_string(OSSL_PARAM_BLD *bld, OSSL_PARAM *p,
                                       const char *key, const char *buf)
  {
      if (bld != NULL)
          return OSSL_PARAM_BLD_push_utf8_string(bld, key, buf, 0);
      p = OSSL_PARAM_locate(p, key);
      if (p != NULL)
          return OSSL_PARAM_set_utf8_string(p, buf);
      return 1;
  }
  
  int ossl_param_build_set_octet_string(OSSL_PARAM_BLD *bld, OSSL_PARAM *p,
                                        const char *key,
                                        const unsigned char *data,
                                        size_t data_len)
  {
      if (bld != NULL)
          return OSSL_PARAM_BLD_push_octet_string(bld, key, data, data_len);
  
      p = OSSL_PARAM_locate(p, key);
      if (p != NULL)
          return OSSL_PARAM_set_octet_string(p, data, data_len);
      return 1;
  }
  
  int ossl_param_build_set_bn_pad(OSSL_PARAM_BLD *bld, OSSL_PARAM *p,
                                  const char *key, const BIGNUM *bn,  size_t sz)
  {
      if (bld != NULL)
          return OSSL_PARAM_BLD_push_BN_pad(bld, key, bn, sz);
      p = OSSL_PARAM_locate(p, key);
      if (p != NULL) {
          if (sz > p->data_size)
              return 0;
          /* TODO(3.0) Change to use OSSL_PARAM_set_BN_pad */
          p->data_size = sz;
          return OSSL_PARAM_set_BN(p, bn);
      }
      return 1;
  }
  
  int ossl_param_build_set_bn(OSSL_PARAM_BLD *bld, OSSL_PARAM *p,
                              const char *key, const BIGNUM *bn)
  {
      if (bld != NULL)
          return OSSL_PARAM_BLD_push_BN(bld, key, bn);
  
      p = OSSL_PARAM_locate(p, key);
      if (p != NULL)
          return OSSL_PARAM_set_BN(p, bn) > 0;
      return 1;
  }
  
  int ossl_param_build_set_multi_key_bn(OSSL_PARAM_BLD *bld, OSSL_PARAM *params,
                                        const char *names[],
                                        STACK_OF(BIGNUM_const) *stk)
  {
      int i, sz = sk_BIGNUM_const_num(stk);
      OSSL_PARAM *p;
  
  
      if (bld != NULL) {
          for (i = 0; i < sz && names[i] != NULL; ++i) {
              if (!OSSL_PARAM_BLD_push_BN(bld, names[i],
                                          sk_BIGNUM_const_value(stk, i)))
                  return 0;
          }
          return 1;
      }
  
      for (i = 0; i < sz && names[i] != NULL; ++i) {
          p = OSSL_PARAM_locate(params, names[i]);
          if (p != NULL) {
              if (!OSSL_PARAM_set_BN(p, sk_BIGNUM_const_value(stk, i)))
                  return 0;
          }
      }
      return 1;
  }
  