/*

 * Copyright(c) 2019 Free Software Foundation, Inc.

 *

 * This file is part of libtasn1.

 *

 * Libtasn1 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 3 of the License, or

 * (at your option) any later version.

 *

 * Libtasn1 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 libtasn1.  If not, see <https://www.gnu.org/licenses/>.

 *

 * This fuzzer is testing asn1_parser2tree()'s robustness with arbitrary ASN.1

 * input data.

 */

#include <config.h>

#include <stdlib.h>   /* malloc, free */

#include <string.h>   /* strcmp, memcpy */

#include "libtasn1.h"

#include "fuzzer.h"

static const uint8_t *g_data;

static size_t g_size;

#if defined HAVE_DLFCN_H && defined HAVE_FMEMOPEN

# include <dlfcn.h>

# ifdef RTLD_NEXT   /* Not defined e.g. on CygWin */

FILE *

fopen (const char *pathname, const char *mode)

{

  FILE *(*libc_fopen) (const char *, const char *) =

    (FILE * (*)(const char *, const char *)) dlsym (RTLD_NEXT, "fopen");

  if (!strcmp (pathname, "pkix.asn"))

    return fmemopen ((void *) g_data, g_size, mode);

  return libc_fopen (pathname, mode);

}

# endif

#endif

int

LLVMFuzzerTestOneInput (const uint8_t *data, size_t size)

{

  char errorDescription[ASN1_MAX_ERROR_DESCRIPTION_SIZE];

  asn1_node definitions = NULL;

  int rc;

  if (size > 10000)    /* same as max_len = 10000 in .options file */

    return 0;

  g_data = data;

  g_size = size;

  rc = asn1_parser2tree ("pkix.asn", &definitions, errorDescription);

  if (rc == ASN1_SUCCESS)

    {

      asn1_delete_structure (&definitions);

    }

  return 0;

}