导出c+中的gpg公钥+；使用gpgme 我需要通过GPGME在C++中输出公钥。我在gpgme_get_key调用中遇到问题，它返回[NO DATA]错误或[END OF FILE]错误

我尝试了gpgme_op_keylist_start，调用返回[NO DATA]，模式为指纹、uid和名称

 gpgme_ctx_t ctx;
 gpgme_error_t err;
 gpgme_data_t  out;
 gpgme_key_t key[4] = {NULL,NULL,NULL,NULL};
  gpgme_key_t ekey[2] = {NULL,NULL};

 init_gpgme (GPGME_PROTOCOL_OpenPGP);

   err = gpgme_new (&ctx);
   fail_if_err (err);
gpgme_set_armor (ctx,1);

/* Might want to comment gpgme_ctx_set_engine_info() below. */
    err = gpgme_ctx_set_engine_info (ctx,GPGME_PROTOCOL_OpenPGP,
      "/usr/local/bin/gpg","/root/budger/.gnupg");
    fail_if_err (err);

  /* Generate test keys. */
      err = gpgme_get_key (ctx,"203EBE6AD4860CDB33A66BE8809C3C1548861E13",&key[0],1);
  fail_if_err (err);


   err = gpgme_data_new (&out);
    fail_if_err (err);

    /* Export key[2] only. */
    ekey[0] = key[0];
      err = gpgme_op_export_keys (ctx,ekey,0,out);
     fail_if_err (err);

    fflush (NULL);
    fputs ("Begin Result:\n", stdout);
  print_data (out);
     fputs ("End Result.\n", stdout);
     gpgme_data_release (out);


 gpgme_release (ctx);
 return 0;

budger@thaw：~/gpgme/ref$/导出 export.cpp:60:GPGME:文件结束

gpgme_op_keylist_start (ctx, NULL, 0);
while (!(err = gpgme_op_keylist_next (ctx, &key[0]))){

   gpgme_op_export_keys(ctx, key, 0, out);
   print_data(out);

}

budger@thaw：~/gpgme/ref$/导出\u新

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分段错误（堆芯转储）

我不得不使用gpgme_op_export（）来搜索钥匙圈，而不是 获取密钥以使用gpgme_op_export_keys（），这会导致seg故障

  gpgme_key_t key[1]={NULL};
  gpgme_data_t out;
  gpgme_data_new(&out);

  gpgme_set_armor (ctx,1);
  gpgme_op_export(ctx, "joe@foo.bar", 0, out);
  print_data(out);