/*

 * Table section functions

 *

 * Copyright (C) 2006-2024, 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 <common.h>

#include <memory.h>

#include <types.h>

#include "libewf_checksum.h"

#include "libewf_definitions.h"

#include "libewf_libbfio.h"

#include "libewf_libcerror.h"

#include "libewf_libcnotify.h"

#include "libewf_section.h"

#include "libewf_table_section.h"

#include "ewf_section.h"

#include "ewf_table.h"

/* Creates a table section

 * Make sure the value table_section is referencing, is set to NULL

 * Returns 1 if successful or -1 on error

 */

int libewf_table_section_initialize(

     libewf_table_section_t **table_section,

     libcerror_error_t **error )

{

  static char *function = "libewf_table_section_initialize";

  if( table_section == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid table section.",

     function );

    return( -1 );

  }

  if( *table_section != NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,

     "%s: invalid table section value already set.",

     function );

    return( -1 );

  }

  *table_section = memory_allocate_structure(

                    libewf_table_section_t );

  if( *table_section == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create table section.",

     function );

    goto on_error;

  }

  if( memory_set(

       *table_section,

       0,

       sizeof( libewf_table_section_t ) ) == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_SET_FAILED,

     "%s: unable to clear table section.",

     function );

    goto on_error;

  }

  return( 1 );

on_error:

  if( *table_section != NULL )

  {

    memory_free(

     *table_section );

    *table_section = NULL;

  }

  return( -1 );

}

/* Frees a table section

 * Returns 1 if successful or -1 on error

 */

int libewf_table_section_free(

     libewf_table_section_t **table_section,

     libcerror_error_t **error )

{

  static char *function = "libewf_table_section_free";

  if( table_section == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid table section.",

     function );

    return( -1 );

  }

  if( *table_section != NULL )

  {

    if( ( *table_section )->section_data != NULL )

    {

      memory_free(

       ( *table_section )->section_data );

    }

    memory_free(

     *table_section );

    *table_section = NULL;

  }

  return( 1 );

}

/* Reads the header of a version 1 table or table2 section or version 2 sector table section

 * Returns the number of bytes read or -1 on error

 */

int libewf_table_section_read_header_data(

     libewf_table_section_t *table_section,

     libewf_io_handle_t *io_handle,

     const uint8_t *data,

     size_t data_size,

     uint8_t format_version,

     libcerror_error_t **error )

{

  static char *function              = "libewf_table_section_read_header_data";

  size_t header_data_size            = 0;

  uint32_t calculated_checksum       = 0;

  uint32_t stored_checksum           = 0;

#if defined( HAVE_VERBOSE_OUTPUT )

  uint32_t maximum_number_of_entries = 0;

#endif

#if defined( HAVE_DEBUG_OUTPUT )

  uint32_t value_32bit               = 0;

#endif

  if( table_section == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid table section.",

     function );

    return( -1 );

  }

  if( io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid IO handle.",

     function );

    return( -1 );

  }

  if( data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid data.",

     function );

    return( -1 );

  }

  if( format_version == 1 )

  {

    header_data_size = sizeof( ewf_table_header_v1_t );

  }

  else if( format_version == 2 )

  {

    header_data_size = sizeof( ewf_table_header_v2_t );

  }

  else

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported format version.",

     function );

    return( -1 );

  }

  if( ( data_size < header_data_size )

   || ( data_size > (size_t) SSIZE_MAX ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid data size value out of bounds.",

     function );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: table header data:\n",

     function );

    libcnotify_print_data(

     data,

     header_data_size,

     0 );

  }

#endif

  if( format_version == 1 )

  {

    byte_stream_copy_to_uint32_little_endian(

     ( (ewf_table_header_v1_t *) data )->number_of_entries,

     table_section->number_of_entries );

    byte_stream_copy_to_uint64_little_endian(

     ( (ewf_table_header_v1_t *) data )->base_offset,

     table_section->base_offset );

    byte_stream_copy_to_uint32_little_endian(

     ( (ewf_table_header_v1_t *) data )->checksum,

     stored_checksum );

  }

  else if( format_version == 2 )

  {

    byte_stream_copy_to_uint64_little_endian(

     ( (ewf_table_header_v2_t *) data )->first_chunk_number,

     table_section->first_chunk_index );

    byte_stream_copy_to_uint32_little_endian(

     ( (ewf_table_header_v2_t *) data )->number_of_entries,

     table_section->number_of_entries );

    byte_stream_copy_to_uint32_little_endian(

     ( (ewf_table_header_v2_t *) data )->checksum,

     stored_checksum );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    if( format_version == 2 )

    {

      libcnotify_printf(

       "%s: first chunk number\t\t: %" PRIu64 "\n",

       function,

       table_section->first_chunk_index );

    }

    libcnotify_printf(

     "%s: number of entries\t\t: %" PRIu32 "\n",

     function,

     table_section->number_of_entries );

    if( format_version == 1 )

    {

      byte_stream_copy_to_uint32_little_endian(

       ( (ewf_table_header_v1_t *) data )->padding1,

       value_32bit );

      libcnotify_printf(

       "%s: padding1\t\t\t\t: 0x%08" PRIx32 "\n",

       function,

       value_32bit );

      libcnotify_printf(

       "%s: base offset\t\t\t: 0x%08" PRIx64 "\n",

       function,

       table_section->base_offset );

      byte_stream_copy_to_uint32_little_endian(

       ( (ewf_table_header_v1_t *) data )->padding2,

       value_32bit );

      libcnotify_printf(

       "%s: padding2\t\t\t\t: 0x%08" PRIx32 "\n",

       function,

       value_32bit );

    }

    else if( format_version == 2 )

    {

      byte_stream_copy_to_uint32_little_endian(

       ( (ewf_table_header_v2_t *) data )->unknown1,

       value_32bit );

      libcnotify_printf(

       "%s: unknown1\t\t\t\t: 0x%08" PRIx32 "\n",

       function,

       value_32bit );

    }

    libcnotify_printf(

     "%s: checksum\t\t\t\t: 0x%08" PRIx32 "\n",

     function,

     stored_checksum );

    if( format_version == 1 )

    {

      libcnotify_printf(

       "\n" );

    }

    else if( format_version == 2 )

    {

      libcnotify_printf(

       "%s: padding:\n",

       function );

      libcnotify_print_data(

       ( (ewf_table_header_v2_t *) data )->padding,

       12,

       0 );

    }

  }

#endif /* defined( HAVE_DEBUG_OUTPUT ) */

  if( format_version == 1 )

  {

    header_data_size -= 4;

  }

  else if( format_version == 2 )

  {

    header_data_size -= 16;

  }

  if( libewf_checksum_calculate_adler32(

       &calculated_checksum,

       data,

       header_data_size,

       1,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_SET_FAILED,

     "%s: unable to calculate header checksum.",

     function );

    return( -1 );

  }

/* TODO flag that header is corrupted and continue */

  if( stored_checksum != calculated_checksum )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_INPUT,

     LIBCERROR_INPUT_ERROR_CHECKSUM_MISMATCH,

     "%s: header checksum does not match (stored: 0x%08" PRIx32 ", calculated: 0x%08" PRIx32 ").",

     function,

     stored_checksum,

     calculated_checksum );

    return( -1 );

  }

#if defined( HAVE_VERBOSE_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

/* TODO what about linen7 */

    if( format_version == 1 )

    {

      if( ( io_handle->format == LIBEWF_FORMAT_ENCASE6 )

       || ( io_handle->format == LIBEWF_FORMAT_ENCASE7 ) )

      {

        maximum_number_of_entries = LIBEWF_MAXIMUM_TABLE_ENTRIES_ENCASE6;

      }

      else

      {

        maximum_number_of_entries = LIBEWF_MAXIMUM_TABLE_ENTRIES;

      }

      if( table_section->number_of_entries > maximum_number_of_entries )

      {

        libcnotify_printf(

         "%s: number of entries: %" PRIu32 " exceeds maximum: %" PRIu32 ".\n",

         function,

         table_section->number_of_entries,

         maximum_number_of_entries );

      }

    }

  }

#endif /* defined( HAVE_VERBOSE_OUTPUT ) */

  if( table_section->base_offset > (uint64_t) INT64_MAX )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid base offset value out of bounds.",

     function );

    return( -1 );

  }

  if( table_section->first_chunk_index > (uint64_t) INT64_MAX )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid first chunk index value out of bounds.",

     function );

    return( -1 );

  }

  return( 1 );

}

/* Reads the footer of a version 1 table or table2 section or version 2 sector table section

 * Returns the number of bytes read or -1 on error

 */

int libewf_table_section_read_footer_data(

     libewf_table_section_t *table_section,

     const uint8_t *data,

     size_t data_size,

     uint8_t format_version,

     uint32_t *stored_checksum,

     libcerror_error_t **error )

{

  static char *function         = "libewf_table_section_read_footer_data";

  size_t footer_data_size       = 0;

  uint32_t safe_stored_checksum = 0;

  if( table_section == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid table section.",

     function );

    return( -1 );

  }

  if( data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid data.",

     function );

    return( -1 );

  }

  if( format_version == 1 )

  {

    footer_data_size = 4;

  }

  else if( format_version == 2 )

  {

    footer_data_size = 16;

  }

  else

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported format version.",

     function );

    return( -1 );

  }

  if( data_size != footer_data_size )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid data size value out of bounds.",

     function );

    return( -1 );

  }

  if( stored_checksum == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid stored checksum.",

     function );

    return( -1 );

  }

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: table footer data:\n",

     function );

    libcnotify_print_data(

     data,

     footer_data_size,

     0 );

  }

#endif

  byte_stream_copy_to_uint32_little_endian(

   data,

   safe_stored_checksum );

#if defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    libcnotify_printf(

     "%s: table entries checksum\t\t: 0x%08" PRIx32 "\n",

     function,

     safe_stored_checksum );

    if( format_version == 1 )

    {

      libcnotify_printf(

       "\n" );

    }

    else if( format_version == 2 )

    {

      libcnotify_printf(

       "%s: padding:\n",

       function );

      libcnotify_print_data(

       &( data[ 4 ] ),

       12,

       0 );

    }

  }

#endif /* defined( HAVE_VERBOSE_OUTPUT ) */

  *stored_checksum = safe_stored_checksum;

  return( 1 );

}

/* Reads a version 1 table or table2 section or version 2 sector table section

 * Returns the number of bytes read or -1 on error

 */

ssize_t libewf_table_section_read_file_io_pool(

         libewf_table_section_t *table_section,

         libewf_io_handle_t *io_handle,

         libbfio_pool_t *file_io_pool,

         int file_io_pool_entry,

         uint8_t format_version,

         uint8_t segment_file_type,

         size64_t section_data_size,

         uint32_t section_data_flags,

         libcerror_error_t **error )

{

  static char *function         = "libewf_table_section_read_file_io_pool";

  size_t data_offset            = 0;

  size_t table_entry_data_size  = 0;

  size_t table_footer_data_size = 0;

  size_t table_header_data_size = 0;

  ssize_t read_count            = 0;

  uint32_t calculated_checksum  = 0;

  uint32_t stored_checksum      = 0;

  if( table_section == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid table section.",

     function );

    return( -1 );

  }

  if( io_handle == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid IO handle.",

     function );

    return( -1 );

  }

  if( format_version == 1 )

  {

    table_header_data_size = sizeof( ewf_table_header_v1_t );

    table_entry_data_size  = sizeof( ewf_table_entry_v1_t );

    /* The original EWF and SMART (EWF-S01) formats do not contain a table footer

     */

    if( segment_file_type != LIBEWF_SEGMENT_FILE_TYPE_EWF1_SMART )

    {

      table_footer_data_size = 4;

    }

  }

  else if( format_version == 2 )

  {

    table_header_data_size = sizeof( ewf_table_header_v2_t );

    table_entry_data_size  = sizeof( ewf_table_entry_v2_t );

    table_footer_data_size = 16;

  }

  else

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported format version.",

     function );

    return( -1 );

  }

  if( ( section_data_size == 0 )

   || ( section_data_size > (size64_t) SSIZE_MAX ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid section data size value out of bounds.",

     function );

    return( -1 );

  }

  /* In original EWF, SMART (EWF-S01) and EnCase1 EWF-E01 the trailing data will be the chunk data

   */

  if( ( segment_file_type == LIBEWF_SEGMENT_FILE_TYPE_EWF1_SMART )

   || ( io_handle->format == LIBEWF_FORMAT_ENCASE1 ) )

  {

/* TODO consider reading max number of chunks for table with chunk data */

    table_section->section_data_size = (size_t) table_header_data_size;

  }

  else

  {

    table_section->section_data_size = (size_t) section_data_size;

  }

  if( ( table_section->section_data_size < table_header_data_size )

   || ( table_section->section_data_size > MEMORY_MAXIMUM_ALLOCATION_SIZE ) )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_RUNTIME,

     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

     "%s: invalid section data size value out of bounds.",

     function );

    goto on_error;

  }

  table_section->section_data = (uint8_t *) memory_allocate(

                                             sizeof( uint8_t ) * table_section->section_data_size );

  if( table_section->section_data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_MEMORY,

     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

     "%s: unable to create section data.",

     function );

    goto on_error;

  }

  read_count = libbfio_pool_read_buffer(

                file_io_pool,

                file_io_pool_entry,

                table_section->section_data,

                table_section->section_data_size,

                error );

  if( read_count != (ssize_t) table_section->section_data_size )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read section data.",

     function );

    goto on_error;

  }

  if( ( section_data_flags & LIBEWF_SECTION_DATA_FLAGS_IS_ENCRYPTED ) != 0 )

  {

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: encrypted data:\n",

       function );

      libcnotify_print_data(

       table_section->section_data,

       table_section->section_data_size,

       0 );

    }

#endif

/* TODO decrypt */

    memory_free(

     table_section->section_data );

    table_section->section_data      = NULL;

    table_section->section_data_size = 0;

    return( 0 );

  }

  if( libewf_table_section_read_header_data(

       table_section,

       io_handle,

       table_section->section_data,

       table_section->section_data_size,

       format_version,

       error ) != 1 )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_IO,

     LIBCERROR_IO_ERROR_READ_FAILED,

     "%s: unable to read table section header.",

     function );

    goto on_error;

  }

  data_offset = table_header_data_size;

  if( table_section->number_of_entries > 0 )

  {

    if( (size_t) table_section->number_of_entries > ( (size_t) MEMORY_MAXIMUM_ALLOCATION_SIZE / table_entry_data_size ) )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_EXCEEDS_MAXIMUM,

       "%s: invalid table section - number of entries value exceeds maximum allocation size.",

       function );

      goto on_error;

    }

    table_section->entries_size = (size_t) table_section->number_of_entries * table_entry_data_size;

    if( ( segment_file_type == LIBEWF_SEGMENT_FILE_TYPE_EWF1_SMART )

     || ( io_handle->format == LIBEWF_FORMAT_ENCASE1 ) )

    {

      if( (size_t) table_section->number_of_entries > ( (size_t) MEMORY_MAXIMUM_ALLOCATION_SIZE - table_footer_data_size ) )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_RUNTIME,

         LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

         "%s: invalid section data size value out of bounds.",

         function );

        goto on_error;

      }

      table_section->section_data_size = table_section->entries_size + table_footer_data_size;

      memory_free(

       table_section->section_data );

/* TODO consider using memory_reallocate */

      table_section->section_data = (uint8_t *) memory_allocate(

                                                 sizeof( uint8_t ) * table_section->section_data_size );

      if( table_section->section_data == NULL )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_MEMORY,

         LIBCERROR_MEMORY_ERROR_INSUFFICIENT,

         "%s: unable to create section data.",

         function );

        goto on_error;

      }

      read_count = libbfio_pool_read_buffer(

              file_io_pool,

              file_io_pool_entry,

              table_section->section_data,

              table_section->section_data_size,

              error );

      if( read_count != (ssize_t) table_section->section_data_size )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_IO,

         LIBCERROR_IO_ERROR_READ_FAILED,

         "%s: unable to read section data.",

         function );

        goto on_error;

      }

      data_offset = 0;

    }

/* TODO flag that number of entries is corrupted and continue */

    if( table_section->entries_size > ( table_section->section_data_size - data_offset ) )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,

       "%s: invalid section size value out of bounds - insufficient space for entries.",

       function );

      goto on_error;

    }

    table_section->entries_offset = data_offset;

#if defined( HAVE_DEBUG_OUTPUT )

    if( libcnotify_verbose != 0 )

    {

      libcnotify_printf(

       "%s: table entries data:\n",

       function );

      libcnotify_print_data(

       &( table_section->section_data[ data_offset ] ),

       table_section->entries_size,

       0 );

    }

#endif

    if( libewf_checksum_calculate_adler32(

         &calculated_checksum,

         &( table_section->section_data[ data_offset ] ),

         table_section->entries_size,

         1,

         error ) != 1 )

    {

      libcerror_error_set(

       error,

       LIBCERROR_ERROR_DOMAIN_RUNTIME,

       LIBCERROR_RUNTIME_ERROR_SET_FAILED,

       "%s: unable to calculate entries checksum.",

       function );

      goto on_error;

    }

    data_offset += table_section->entries_size;

    if( table_footer_data_size > 0 )

    {

      if( libewf_table_section_read_footer_data(

           table_section,

           &( table_section->section_data[ data_offset ] ),

           table_section->section_data_size - data_offset,

           format_version,

           &stored_checksum,

           error ) != 1 )

      {

        libcerror_error_set(

         error,

         LIBCERROR_ERROR_DOMAIN_IO,

         LIBCERROR_IO_ERROR_READ_FAILED,

         "%s: unable to read table section footer.",

         function );

        goto on_error;

      }

      data_offset += table_footer_data_size;

      if( stored_checksum != calculated_checksum )

      {

#if defined( HAVE_VERBOSE_OUTPUT )

                          if( libcnotify_verbose != 0 )

        {

          libcnotify_printf(

           "%s: entries checksum does not match (stored: 0x%08" PRIx32 ", calculated: 0x%08" PRIx32 ").\n",

           function,

           stored_checksum,

           calculated_checksum );

        }

#endif

        /* The table entries cannot be fully trusted therefore mark them as corrupted

         */

        table_section->entries_corrupted = 1;

      }

    }

  }

#if defined( HAVE_VERBOSE_OUTPUT )

  else if( libcnotify_verbose != 0 )

  {

    if( table_section->number_of_entries == 0 )

    {

      libcnotify_printf(

       "%s: table section contains no entries.\n",

       function );

    }

  }

#endif

#if defined( HAVE_VERBOSE_OUTPUT ) || defined( HAVE_DEBUG_OUTPUT )

  if( libcnotify_verbose != 0 )

  {

    if( data_offset < table_section->section_data_size )

    {

#if defined( HAVE_DEBUG_OUTPUT )

      libcnotify_printf(

       "%s: trailing data:\n",

       function );

      libcnotify_print_data(

       &( table_section->section_data[ data_offset ] ),

       table_section->section_data_size - data_offset,

       0 );

#elif defined( HAVE_VERBOSE_OUTPUT )

      libcnotify_printf(

       "%s: section has trailing data.\n",

       function );

#endif

    }

  }

#endif

  return( read_count );

on_error:

  if( table_section->section_data != NULL )

  {

    memory_free(

     table_section->section_data );

    table_section->section_data = NULL;

  }

  table_section->section_data_size = 0;

  return( -1 );

}

/* Writes the header of a version 1 table or table2 section or version 2 sector table section

 * Returns the number of bytes written or -1 on error

 */

int libewf_table_section_write_header_data(

     libewf_table_section_t *table_section,

     uint8_t *data,

     size_t data_size,

     uint8_t format_version,

     libcerror_error_t **error )

{

  static char *function        = "libewf_table_section_write_header_data";

  size_t header_data_size      = 0;

  uint32_t calculated_checksum = 0;

  if( table_section == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid table section.",

     function );

    return( -1 );

  }

  if( data == NULL )

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,

     "%s: invalid data.",

     function );

    return( -1 );

  }

  if( format_version == 1 )

  {

    header_data_size = sizeof( ewf_table_header_v1_t );

  }

  else if( format_version == 2 )

  {

    header_data_size = sizeof( ewf_table_header_v2_t );

  }

  else

  {

    libcerror_error_set(

     error,

     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,

     LIBCERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,

     "%s: unsupported format version.",

     function );

    return( -1 );

  }

  if( ( data_size < header_data_size )