/*

 * OSS-Fuzz target for libqcow file type

 *

 * Copyright (C) 2010-2026, Joachim Metz <joachim.metz@gmail.com>

 *

 * Refer to AUTHORS for acknowledgements.

 *

 * This program 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.

 *

 * This program 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 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 <stddef.h>

#include <stdint.h>

/* Note that some of the OSS-Fuzz engines use C++

 */

extern "C" {

#include "ossfuzz_libbfio.h"

#include "ossfuzz_libqcow.h"

#if !defined( LIBQCOW_HAVE_BFIO )

/* Opens a file using a Basic File IO (bfio) handle

 * Returns 1 if successful or -1 on error

 */

LIBQCOW_EXTERN \

int libqcow_file_open_file_io_handle(

     libqcow_file_t *file,

     libbfio_handle_t *file_io_handle,

     int access_flags,

     libqcow_error_t **error );

#endif /* !defined( LIBQCOW_HAVE_BFIO ) */

int LLVMFuzzerTestOneInput(

     const uint8_t *data,

     size_t size )

{

  uint8_t buffer[ 512 ];

  uint8_t utf8_string[ 64 ];

  uint16_t utf16_string[ 64 ];

  libbfio_handle_t *file_io_handle = NULL;

  libqcow_file_t *file             = NULL;

  off64_t media_offset             = 0;

  size64_t media_size              = 0;

  size_t string_size               = 0;

  uint32_t value_32bit             = 0;

  int number_of_snapshots          = 0;

  int read_iterator                = 0;

  if( libbfio_memory_range_initialize(

       &file_io_handle,

       NULL ) != 1 )

  {

    return( 0 );

  }

  if( libbfio_memory_range_set(

       file_io_handle,

       (uint8_t *) data,

       size,

       NULL ) != 1 )

  {

    goto on_error_libbfio;

  }

  if( libqcow_file_initialize(

       &file,

       NULL ) != 1 )

  {

    goto on_error_libbfio;

  }

  if( libqcow_file_open_file_io_handle(

       file,

       file_io_handle,

       LIBQCOW_OPEN_READ,

       NULL ) != 1 )

  {

    goto on_error_libqcow;

  }

  if( libqcow_file_get_format_version(

       file,

       &value_32bit,

       NULL ) != 1 )

  {

    goto on_error_libqcow;

  }

  if( libqcow_file_get_encryption_method(

       file,

       &value_32bit,

       NULL ) != 1 )

  {

    goto on_error_libqcow;

  }

  if( libqcow_file_get_utf8_backing_filename_size(

       file,

       &string_size,

       NULL ) == -1 )

  {

    goto on_error_libqcow;

  }

  if( libqcow_file_get_utf8_backing_filename(

       file,

       utf8_string,

       64,

       NULL ) == -1 )

  {

    goto on_error_libqcow;

  }

  if( libqcow_file_get_utf16_backing_filename_size(

       file,

       &string_size,

       NULL ) == -1 )

  {

    goto on_error_libqcow;

  }

  if( libqcow_file_get_utf16_backing_filename(

       file,

       utf16_string,

       64,

       NULL ) == -1 )

  {

    goto on_error_libqcow;

  }

  if( libqcow_file_get_number_of_snapshots(

       file,

       &number_of_snapshots,

       NULL ) != 1 )

  {

    goto on_error_libqcow;

  }

  if( libqcow_file_get_media_size(

       file,

       &media_size,

       NULL ) != 1 )

  {

    goto on_error_libqcow;

  }

  for( read_iterator = 0;

       read_iterator < 128;

       read_iterator++ )

  {

    if( media_offset >= media_size )

    {

      break;

    }

    if( libqcow_file_read_buffer_at_offset(

         file,

         buffer,

         497,

         media_offset,

         NULL ) == -1 )

    {

      goto on_error_libqcow;

    }

    media_offset += 497;

  }

  libqcow_file_close(

   file,

   NULL );

on_error_libqcow:

  libqcow_file_free(

   &file,

   NULL );

on_error_libbfio:

  libbfio_handle_free(

   &file_io_handle,

   NULL );

  return( 0 );

}

} /* extern "C" */