/*

 * Copyright (C) 2005-2015 Free Software Foundation, Inc.

 * Copyright (C) 2015 Nikos Mavrogiannopoulos, Inc.

 *

 * Author: Nikos Mavrogiannopoulos

 *

 * This file is part of GnuTLS.

 *

 * The GnuTLS is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public License

 * as published by the Free Software Foundation; either version 2.1 of

 * the License, or (at your option) any later version.

 *

 * This library is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public License

 * along with this program.  If not, see <https://www.gnu.org/licenses/>

 *

 */

#include "gnutls_int.h"

#include "file.h"

#include <read-file.h>

int _gnutls_file_exists(const char *file)

{

  FILE *fp;

  fp = fopen(file, "re");

  if (fp == NULL)

    return -1;

  fclose(fp);

  return 0;

}

/**

 * gnutls_load_file:

 * @filename: the name of the file to load

 * @data: Where the file will be stored

 *

 * This function will load a file into a datum. The data are

 * zero terminated but the terminating null is not included in length.

 * The returned data are allocated using gnutls_malloc().

 *

 * Note that this function is not designed for reading sensitive materials,

 * such as private keys, on practical applications. When the reading fails

 * in the middle, the partially loaded content might remain on memory.

 *

 * Returns: On success, %GNUTLS_E_SUCCESS (0) is returned, otherwise

 *   an error code is returned.

 *

 * Since 3.1.0

 **/

int gnutls_load_file(const char *filename, gnutls_datum_t *data)

{

  size_t len;

  data->data = (void *)read_file(filename, RF_BINARY, &len);

  if (data->data == NULL)

    return GNUTLS_E_FILE_ERROR;

  if (malloc != gnutls_malloc) {

    void *tmp = gnutls_malloc(len);

    memcpy(tmp, data->data, len);

    free(data->data);

    data->data = tmp;

  }

  data->size = len;

  return 0;

}