/*

 * OSS-Fuzz target for libvsgpt volume type

 *

 * Copyright (C) 2019-2026, 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_libvsgpt.h"

#if !defined( LIBVSGPT_HAVE_BFIO )

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

 * Returns 1 if successful or -1 on error

 */

LIBVSGPT_EXTERN \

int libvsgpt_volume_open_file_io_handle(

     libvsgpt_volume_t *volume,

     libbfio_handle_t *file_io_handle,

     int access_flags,

     libvsgpt_error_t **error );

#endif /* !defined( LIBVSGPT_HAVE_BFIO ) */

int LLVMFuzzerTestOneInput(

     const uint8_t *data,

     size_t size )

{

  uint8_t buffer[ 512 ];

  uint8_t guid[ 16 ];

  libbfio_handle_t *file_io_handle = NULL;

  libvsgpt_partition_t *partition  = NULL;

  libvsgpt_volume_t *volume        = NULL;

  off64_t partition_offset         = 0;

  off64_t volume_offset            = 0;

  size64_t partition_size          = 0;

  uint32_t value_32bit             = 0;

  uint8_t value_8bit               = 0;

  int number_of_partitions         = 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( libvsgpt_volume_initialize(

       &volume,

       NULL ) != 1 )

  {

    goto on_error_libbfio;

  }

  if( libvsgpt_volume_open_file_io_handle(

       volume,

       file_io_handle,

       LIBVSGPT_OPEN_READ,

       NULL ) != 1 )

  {

    goto on_error_libvsgpt_volume;

  }

  if( libvsgpt_volume_get_number_of_partitions(

       volume,

       &number_of_partitions,

       NULL ) != 1 )

  {

    goto on_error_libvsgpt_volume;

  }

  if( number_of_partitions > 0 )

  {

    if( libvsgpt_volume_get_partition_by_index(

         volume,

         0,

         &partition,

         NULL ) != 1 )

    {

      goto on_error_libvsgpt_volume;

    }

    if( libvsgpt_partition_get_entry_index(

         partition,

         &value_32bit,

         NULL ) != 1 )

    {

      goto on_error_libvsgpt_partition;

    }

    if( libvsgpt_partition_get_identifier(

         partition,

         guid,

         16,

         NULL ) != 1 )

    {

      goto on_error_libvsgpt_partition;

    }

    if( libvsgpt_partition_get_type_identifier(

         partition,

         guid,

         16,

         NULL ) != 1 )

    {

      goto on_error_libvsgpt_partition;

    }

    if( libvsgpt_partition_get_type(

         partition,

         &value_8bit,

         NULL ) != 1 )

    {

      goto on_error_libvsgpt_partition;

    }

    if( libvsgpt_partition_get_volume_offset(

         partition,

         &volume_offset,

         NULL ) != 1 )

    {

      goto on_error_libvsgpt_partition;

    }

    if( libvsgpt_partition_get_size(

         partition,

         &partition_size,

         NULL ) != 1 )

    {

      goto on_error_libvsgpt_partition;

    }

    for( read_iterator = 0;

         read_iterator < 128;

         read_iterator++ )

    {

      if( partition_offset >= partition_size )

      {

        break;

      }

      if( libvsgpt_partition_read_buffer_at_offset(

           partition,

           buffer,

           497,

           partition_offset,

           NULL ) == -1 )

      {

        goto on_error_libvsgpt_partition;

      }

      partition_offset += 497;

    }

on_error_libvsgpt_partition:

    libvsgpt_partition_free(

     &partition,

     NULL );

  }

  libvsgpt_volume_close(

   volume,

   NULL );

on_error_libvsgpt_volume:

  libvsgpt_volume_free(

   &volume,

   NULL );

on_error_libbfio:

  libbfio_handle_free(

   &file_io_handle,

   NULL );

  return( 0 );

}

} /* extern "C" */