/src/libvmdk/libvmdk/libvmdk_grain_data.c

Source (jump to first uncovered line)
/*
 * Grain data functions
 *
 * Copyright (C) 2009-2024, 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 <byte_stream.h>
#include <memory.h>
#include <types.h>

#include "libvmdk_compression.h"
#include "libvmdk_definitions.h"
#include "libvmdk_grain_data.h"
#include "libvmdk_handle.h"
#include "libvmdk_io_handle.h"
#include "libvmdk_libcerror.h"
#include "libvmdk_libcnotify.h"
#include "libvmdk_libfdata.h"
#include "libvmdk_unused.h"

/* Creates grain data
 * Make sure the value grain_data is referencing, is set to NULL
 * Returns 1 if successful or -1 on error
 */
int libvmdk_grain_data_initialize(
     libvmdk_grain_data_t **grain_data,
     size_t data_size,
     libcerror_error_t **error )
{
  static char *function = "libvmdk_grain_data_initialize";

  if( grain_data == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid grain data.",
     function );

    return( -1 );
  }
  if( *grain_data != NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
     "%s: invalid grain data value already set.",
     function );

    return( -1 );
  }
  if( ( data_size == 0 )
   || ( data_size > (size_t) MEMORY_MAXIMUM_ALLOCATION_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 );
  }
  *grain_data = memory_allocate_structure(
                 libvmdk_grain_data_t );

  if( *grain_data == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
     "%s: unable to create grain data.",
     function );

    goto on_error;
  }
  if( memory_set(
       *grain_data,
       0,
       sizeof( libvmdk_grain_data_t ) ) == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_SET_FAILED,
     "%s: unable to clear grain data.",
     function );

    goto on_error;
  }
  ( *grain_data )->data = (uint8_t *) memory_allocate(
                                       sizeof( uint8_t ) * data_size );

  if( ( *grain_data )->data == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_MEMORY,
     LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
     "%s: unable to create data.",
     function );

    goto on_error;
  }
  ( *grain_data )->data_size = data_size;

  return( 1 );

on_error:
  if( *grain_data != NULL )
  {
    memory_free(
     *grain_data );

    *grain_data = NULL;
  }
  return( -1 );
}

/* Frees grain data
 * Returns 1 if successful or -1 on error
 */
int libvmdk_grain_data_free(
     libvmdk_grain_data_t **grain_data,
     libcerror_error_t **error )
{
  static char *function = "libvmdk_grain_data_free";

  if( grain_data == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid grain data.",
     function );

    return( -1 );
  }
  if( *grain_data != NULL )
  {
    if( ( *grain_data )->data != NULL )
    {
      memory_free(
       ( *grain_data )->data );
    }
    memory_free(
     *grain_data );

    *grain_data = NULL;
  }
  return( 1 );
}

/* Reads a compressed grain data header
 * The number of bytes read or -1 on error
 */
ssize_t libvmdk_grain_data_read_compressed_header(
         libvmdk_grain_data_t *grain_data,
         libvmdk_io_handle_t *io_handle,
         libbfio_pool_t *file_io_pool,
         int file_io_pool_entry,
         libcerror_error_t **error )
{
  uint8_t compressed_data_header[ 12 ];

  static char *function = "libvmdk_grain_data_read_compressed_header";
  ssize_t read_count    = 0;

  if( grain_data == NULL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
     "%s: invalid grain data.",
     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 );
  }
  read_count = libbfio_pool_read_buffer(
          file_io_pool,
          file_io_pool_entry,
          compressed_data_header,
          12,
          error );

  if( read_count != (ssize_t) 12 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_IO,
     LIBCERROR_IO_ERROR_READ_FAILED,
     "%s: unable to read compressed grain data header.",
     function );

    return( -1 );
  }
#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: compressed grain data header:\n",
     function );
    libcnotify_print_data(
     compressed_data_header,
     12,
     0 );
  }
#endif
  byte_stream_copy_to_uint64_little_endian(
   compressed_data_header,
   grain_data->uncompressed_data_offset );

  byte_stream_copy_to_uint32_little_endian(
   &( compressed_data_header[ 8 ] ),
   grain_data->compressed_data_size );

#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: uncompressed data offset\t: %" PRIu64 " grains (0x%08" PRIx64 ")\n",
     function,
     grain_data->uncompressed_data_offset,
     grain_data->uncompressed_data_offset * io_handle->grain_size );

    libcnotify_printf(
     "%s: compressed data size\t\t: %" PRIu32 "\n",
     function,
     grain_data->compressed_data_size );

    libcnotify_printf(
     "\n" );
  }
#endif
  grain_data->uncompressed_data_offset *= io_handle->grain_size;

  return( read_count );
}

/* Reads a grain
 * Callback function for the grains list
 * Returns 1 if successful or -1 on error
 */
int libvmdk_grain_data_read_element_data(
     libvmdk_io_handle_t *io_handle,
     libbfio_pool_t *file_io_pool,
     libfdata_list_element_t *element,
     libfdata_cache_t *cache,
     int file_io_pool_entry,
     off64_t grain_data_offset,
     size64_t grain_data_size,
     uint32_t grain_data_flags,
     uint8_t read_flags LIBVMDK_ATTRIBUTE_UNUSED,
     libcerror_error_t **error )
{
  libvmdk_grain_data_t *grain_data = NULL;
  uint8_t *compressed_data         = NULL;
  static char *function            = "libvmdk_grain_data_read_element_data";
  ssize_t read_count               = 0;

  LIBVMDK_UNREFERENCED_PARAMETER( read_flags )

  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( ( grain_data_size == (size64_t) 0 )
   || ( grain_data_size > (size64_t) SSIZE_MAX ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid grain data size value out of bounds.",
     function );

    return( -1 );
  }
  if( ( grain_data_flags & LIBVMDK_RANGE_FLAG_IS_SPARSE ) != 0 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
     "%s: sparse grain not supported.",
     function );

    return( -1 );
  }
  if( libbfio_pool_seek_offset(
       file_io_pool,
       file_io_pool_entry,
       grain_data_offset,
       SEEK_SET,
       error ) == -1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_IO,
     LIBCERROR_IO_ERROR_SEEK_FAILED,
     "%s: unable to seek grain offset: %" PRIi64 " in file IO pool entry: %d.",
     function,
     grain_data_offset,
     file_io_pool_entry );

    goto on_error;
  }
  if( ( grain_data_flags & LIBVMDK_RANGE_FLAG_IS_COMPRESSED ) != 0 )
  {
    if( io_handle->grain_size > (size64_t) SSIZE_MAX )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
       "%s: invalid IO handle - grain size value exceeds maximum.",
       function );

      goto on_error;
    }
    if( libvmdk_grain_data_initialize(
         &grain_data,
         (size_t) io_handle->grain_size,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
       "%s: unable to create grain data.",
       function );

      goto on_error;
    }
    read_count = libvmdk_grain_data_read_compressed_header(
                  grain_data,
                  io_handle,
                  file_io_pool,
                  file_io_pool_entry,
                  error );

    if( read_count == -1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_IO,
       LIBCERROR_IO_ERROR_READ_FAILED,
       "%s: unable to read compressed grain data header.",
       function );

      goto on_error;
    }
    if( ( grain_data->compressed_data_size == 0 )
     || ( grain_data->compressed_data_size > (uint32_t) MEMORY_MAXIMUM_ALLOCATION_SIZE ) )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
       "%s: invalid grain data - compressed data size value out of bounds.",
       function );

      goto on_error;
    }
    compressed_data = (uint8_t *) memory_allocate(
                                   sizeof( uint8_t ) * (size_t) grain_data->compressed_data_size );

    if( compressed_data == NULL )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_MEMORY,
       LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
       "%s: unable to create compressed data.",
       function );

      goto on_error;
    }
    read_count = libbfio_pool_read_buffer(
            file_io_pool,
            file_io_pool_entry,
            compressed_data,
            (size_t) grain_data->compressed_data_size,
            error );

    if( read_count != (ssize_t) grain_data->compressed_data_size )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_IO,
       LIBCERROR_IO_ERROR_READ_FAILED,
       "%s: unable to read compressed grain data.",
       function );

      goto on_error;
    }
    if( libvmdk_decompress_data(
         compressed_data,
         (size_t) grain_data->compressed_data_size,
         LIBVMDK_COMPRESSION_METHOD_DEFLATE,
         grain_data->data,
         &( grain_data->data_size ),
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_COMPRESSION,
       LIBCERROR_COMPRESSION_ERROR_DECOMPRESS_FAILED,
       "%s: unable to decompress grain data.",
       function );

      goto on_error;
    }
    memory_free(
     compressed_data );

    compressed_data = NULL;
  }
  else
  {
    if( libvmdk_grain_data_initialize(
         &grain_data,
         (size_t) grain_data_size,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
       "%s: unable to create grain data.",
       function );

      goto on_error;
    }
    if( grain_data == NULL )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
       "%s: missing grain data.",
       function );

      goto on_error;
    }
    read_count = libbfio_pool_read_buffer(
            file_io_pool,
            file_io_pool_entry,
            grain_data->data,
            (size_t) grain_data_size,
            error );

    if( read_count != (ssize_t) grain_data_size )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_IO,
       LIBCERROR_IO_ERROR_READ_FAILED,
       "%s: unable to read grain data.",
       function );

      goto on_error;
    }
  }
  if( libfdata_list_element_set_element_value(
       element,
       (intptr_t *) file_io_pool,
       cache,
       (intptr_t *) grain_data,
       (int (*)(intptr_t **, libcerror_error_t **)) &libvmdk_grain_data_free,
       LIBFDATA_LIST_ELEMENT_VALUE_FLAG_MANAGED,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_SET_FAILED,
     "%s: unable to set grain data as element value.",
     function );

    goto on_error;
  }
  return( 1 );

on_error:
  if( compressed_data != NULL )
  {
    memory_free(
     compressed_data );
  }
  if( grain_data != NULL )
  {
    libvmdk_grain_data_free(
     &grain_data,
     NULL );
  }
  return( -1 );
}


Coverage Report

Created: 2025-09-05 06:58

Line	Count	Source (jump to first uncovered line)
1		/*
2		* Grain data functions
3		*
4		* Copyright (C) 2009-2024, Joachim Metz <joachim.metz@gmail.com>
5		*
6		* Refer to AUTHORS for acknowledgements.
7		*
8		* This program is free software: you can redistribute it and/or modify
9		* it under the terms of the GNU Lesser General Public License as published by
10		* the Free Software Foundation, either version 3 of the License, or
11		* (at your option) any later version.
12		*
13		* This program is distributed in the hope that it will be useful,
14		* but WITHOUT ANY WARRANTY; without even the implied warranty of
15		* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16		* GNU General Public License for more details.
17		*
18		* You should have received a copy of the GNU Lesser General Public License
19		* along with this program. If not, see <https://www.gnu.org/licenses/>.
20		*/
21
22		#include <common.h>
23		#include <byte_stream.h>
24		#include <memory.h>
25		#include <types.h>
26
27		#include "libvmdk_compression.h"
28		#include "libvmdk_definitions.h"
29		#include "libvmdk_grain_data.h"
30		#include "libvmdk_handle.h"
31		#include "libvmdk_io_handle.h"
32		#include "libvmdk_libcerror.h"
33		#include "libvmdk_libcnotify.h"
34		#include "libvmdk_libfdata.h"
35		#include "libvmdk_unused.h"
36
37		/* Creates grain data
38		* Make sure the value grain_data is referencing, is set to NULL
39		* Returns 1 if successful or -1 on error
40		*/
41		int libvmdk_grain_data_initialize(
42		libvmdk_grain_data_t **grain_data,
43		size_t data_size,
44		libcerror_error_t **error )
45	0	{
46	0	static char *function = "libvmdk_grain_data_initialize";
47
48	0	if( grain_data == NULL )
49	0	{
50	0	libcerror_error_set(
51	0	error,
52	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
53	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
54	0	"%s: invalid grain data.",
55	0	function );
56
57	0	return( -1 );
58	0	}
59	0	if( *grain_data != NULL )
60	0	{
61	0	libcerror_error_set(
62	0	error,
63	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
64	0	LIBCERROR_RUNTIME_ERROR_VALUE_ALREADY_SET,
65	0	"%s: invalid grain data value already set.",
66	0	function );
67
68	0	return( -1 );
69	0	}
70	0	if( ( data_size == 0 )
71	0	\|\| ( data_size > (size_t) MEMORY_MAXIMUM_ALLOCATION_SIZE ) )
72	0	{
73	0	libcerror_error_set(
74	0	error,
75	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
76	0	LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
77	0	"%s: invalid data size value out of bounds.",
78	0	function );
79
80	0	return( -1 );
81	0	}
82	0	*grain_data = memory_allocate_structure(
83	0	libvmdk_grain_data_t );
84
85	0	if( *grain_data == NULL )
86	0	{
87	0	libcerror_error_set(
88	0	error,
89	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
90	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
91	0	"%s: unable to create grain data.",
92	0	function );
93
94	0	goto on_error;
95	0	}
96	0	if( memory_set(
97	0	*grain_data,
98	0	0,
99	0	sizeof( libvmdk_grain_data_t ) ) == NULL )
100	0	{
101	0	libcerror_error_set(
102	0	error,
103	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
104	0	LIBCERROR_MEMORY_ERROR_SET_FAILED,
105	0	"%s: unable to clear grain data.",
106	0	function );
107
108	0	goto on_error;
109	0	}
110	0	( grain_data )->data = (uint8_t ) memory_allocate(
111	0	sizeof( uint8_t ) * data_size );
112
113	0	if( ( *grain_data )->data == NULL )
114	0	{
115	0	libcerror_error_set(
116	0	error,
117	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
118	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
119	0	"%s: unable to create data.",
120	0	function );
121
122	0	goto on_error;
123	0	}
124	0	( *grain_data )->data_size = data_size;
125
126	0	return( 1 );
127
128	0	on_error:
129	0	if( *grain_data != NULL )
130	0	{
131	0	memory_free(
132	0	*grain_data );
133
134	0	*grain_data = NULL;
135	0	}
136	0	return( -1 );
137	0	}
138
139		/* Frees grain data
140		* Returns 1 if successful or -1 on error
141		*/
142		int libvmdk_grain_data_free(
143		libvmdk_grain_data_t **grain_data,
144		libcerror_error_t **error )
145	0	{
146	0	static char *function = "libvmdk_grain_data_free";
147
148	0	if( grain_data == NULL )
149	0	{
150	0	libcerror_error_set(
151	0	error,
152	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
153	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
154	0	"%s: invalid grain data.",
155	0	function );
156
157	0	return( -1 );
158	0	}
159	0	if( *grain_data != NULL )
160	0	{
161	0	if( ( *grain_data )->data != NULL )
162	0	{
163	0	memory_free(
164	0	( *grain_data )->data );
165	0	}
166	0	memory_free(
167	0	*grain_data );
168
169	0	*grain_data = NULL;
170	0	}
171	0	return( 1 );
172	0	}
173
174		/* Reads a compressed grain data header
175		* The number of bytes read or -1 on error
176		*/
177		ssize_t libvmdk_grain_data_read_compressed_header(
178		libvmdk_grain_data_t *grain_data,
179		libvmdk_io_handle_t *io_handle,
180		libbfio_pool_t *file_io_pool,
181		int file_io_pool_entry,
182		libcerror_error_t **error )
183	0	{
184	0	uint8_t compressed_data_header[ 12 ];
185
186	0	static char *function = "libvmdk_grain_data_read_compressed_header";
187	0	ssize_t read_count = 0;
188
189	0	if( grain_data == NULL )
190	0	{
191	0	libcerror_error_set(
192	0	error,
193	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
194	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
195	0	"%s: invalid grain data.",
196	0	function );
197
198	0	return( -1 );
199	0	}
200	0	if( io_handle == NULL )
201	0	{
202	0	libcerror_error_set(
203	0	error,
204	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
205	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
206	0	"%s: invalid IO handle.",
207	0	function );
208
209	0	return( -1 );
210	0	}
211	0	read_count = libbfio_pool_read_buffer(
212	0	file_io_pool,
213	0	file_io_pool_entry,
214	0	compressed_data_header,
215	0	12,
216	0	error );
217
218	0	if( read_count != (ssize_t) 12 )
219	0	{
220	0	libcerror_error_set(
221	0	error,
222	0	LIBCERROR_ERROR_DOMAIN_IO,
223	0	LIBCERROR_IO_ERROR_READ_FAILED,
224	0	"%s: unable to read compressed grain data header.",
225	0	function );
226
227	0	return( -1 );
228	0	}
229		#if defined( HAVE_DEBUG_OUTPUT )
230		if( libcnotify_verbose != 0 )
231		{
232		libcnotify_printf(
233		"%s: compressed grain data header:\n",
234		function );
235		libcnotify_print_data(
236		compressed_data_header,
237		12,
238		0 );
239		}
240		#endif
241	0	byte_stream_copy_to_uint64_little_endian(
242	0	compressed_data_header,
243	0	grain_data->uncompressed_data_offset );
244
245	0	byte_stream_copy_to_uint32_little_endian(
246	0	&( compressed_data_header[ 8 ] ),
247	0	grain_data->compressed_data_size );
248
249		#if defined( HAVE_DEBUG_OUTPUT )
250		if( libcnotify_verbose != 0 )
251		{
252		libcnotify_printf(
253		"%s: uncompressed data offset\t: %" PRIu64 " grains (0x%08" PRIx64 ")\n",
254		function,
255		grain_data->uncompressed_data_offset,
256		grain_data->uncompressed_data_offset * io_handle->grain_size );
257
258		libcnotify_printf(
259		"%s: compressed data size\t\t: %" PRIu32 "\n",
260		function,
261		grain_data->compressed_data_size );
262
263		libcnotify_printf(
264		"\n" );
265		}
266		#endif
267	0	grain_data->uncompressed_data_offset *= io_handle->grain_size;
268
269	0	return( read_count );
270	0	}
271
272		/* Reads a grain
273		* Callback function for the grains list
274		* Returns 1 if successful or -1 on error
275		*/
276		int libvmdk_grain_data_read_element_data(
277		libvmdk_io_handle_t *io_handle,
278		libbfio_pool_t *file_io_pool,
279		libfdata_list_element_t *element,
280		libfdata_cache_t *cache,
281		int file_io_pool_entry,
282		off64_t grain_data_offset,
283		size64_t grain_data_size,
284		uint32_t grain_data_flags,
285		uint8_t read_flags LIBVMDK_ATTRIBUTE_UNUSED,
286		libcerror_error_t **error )
287	0	{
288	0	libvmdk_grain_data_t *grain_data = NULL;
289	0	uint8_t *compressed_data = NULL;
290	0	static char *function = "libvmdk_grain_data_read_element_data";
291	0	ssize_t read_count = 0;
292
293	0	LIBVMDK_UNREFERENCED_PARAMETER( read_flags )
294
295	0	if( io_handle == NULL )
296	0	{
297	0	libcerror_error_set(
298	0	error,
299	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
300	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
301	0	"%s: invalid IO handle.",
302	0	function );
303
304	0	return( -1 );
305	0	}
306	0	if( ( grain_data_size == (size64_t) 0 )
307	0	\|\| ( grain_data_size > (size64_t) SSIZE_MAX ) )
308	0	{
309	0	libcerror_error_set(
310	0	error,
311	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
312	0	LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
313	0	"%s: invalid grain data size value out of bounds.",
314	0	function );
315
316	0	return( -1 );
317	0	}
318	0	if( ( grain_data_flags & LIBVMDK_RANGE_FLAG_IS_SPARSE ) != 0 )
319	0	{
320	0	libcerror_error_set(
321	0	error,
322	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
323	0	LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
324	0	"%s: sparse grain not supported.",
325	0	function );
326
327	0	return( -1 );
328	0	}
329	0	if( libbfio_pool_seek_offset(
330	0	file_io_pool,
331	0	file_io_pool_entry,
332	0	grain_data_offset,
333	0	SEEK_SET,
334	0	error ) == -1 )
335	0	{
336	0	libcerror_error_set(
337	0	error,
338	0	LIBCERROR_ERROR_DOMAIN_IO,
339	0	LIBCERROR_IO_ERROR_SEEK_FAILED,
340	0	"%s: unable to seek grain offset: %" PRIi64 " in file IO pool entry: %d.",
341	0	function,
342	0	grain_data_offset,
343	0	file_io_pool_entry );
344
345	0	goto on_error;
346	0	}
347	0	if( ( grain_data_flags & LIBVMDK_RANGE_FLAG_IS_COMPRESSED ) != 0 )
348	0	{
349	0	if( io_handle->grain_size > (size64_t) SSIZE_MAX )
350	0	{
351	0	libcerror_error_set(
352	0	error,
353	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
354	0	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
355	0	"%s: invalid IO handle - grain size value exceeds maximum.",
356	0	function );
357
358	0	goto on_error;
359	0	}
360	0	if( libvmdk_grain_data_initialize(
361	0	&grain_data,
362	0	(size_t) io_handle->grain_size,
363	0	error ) != 1 )
364	0	{
365	0	libcerror_error_set(
366	0	error,
367	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
368	0	LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
369	0	"%s: unable to create grain data.",
370	0	function );
371
372	0	goto on_error;
373	0	}
374	0	read_count = libvmdk_grain_data_read_compressed_header(
375	0	grain_data,
376	0	io_handle,
377	0	file_io_pool,
378	0	file_io_pool_entry,
379	0	error );
380
381	0	if( read_count == -1 )
382	0	{
383	0	libcerror_error_set(
384	0	error,
385	0	LIBCERROR_ERROR_DOMAIN_IO,
386	0	LIBCERROR_IO_ERROR_READ_FAILED,
387	0	"%s: unable to read compressed grain data header.",
388	0	function );
389
390	0	goto on_error;
391	0	}
392	0	if( ( grain_data->compressed_data_size == 0 )
393	0	\|\| ( grain_data->compressed_data_size > (uint32_t) MEMORY_MAXIMUM_ALLOCATION_SIZE ) )
394	0	{
395	0	libcerror_error_set(
396	0	error,
397	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
398	0	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
399	0	"%s: invalid grain data - compressed data size value out of bounds.",
400	0	function );
401
402	0	goto on_error;
403	0	}
404	0	compressed_data = (uint8_t *) memory_allocate(
405	0	sizeof( uint8_t ) * (size_t) grain_data->compressed_data_size );
406
407	0	if( compressed_data == NULL )
408	0	{
409	0	libcerror_error_set(
410	0	error,
411	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
412	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
413	0	"%s: unable to create compressed data.",
414	0	function );
415
416	0	goto on_error;
417	0	}
418	0	read_count = libbfio_pool_read_buffer(
419	0	file_io_pool,
420	0	file_io_pool_entry,
421	0	compressed_data,
422	0	(size_t) grain_data->compressed_data_size,
423	0	error );
424
425	0	if( read_count != (ssize_t) grain_data->compressed_data_size )
426	0	{
427	0	libcerror_error_set(
428	0	error,
429	0	LIBCERROR_ERROR_DOMAIN_IO,
430	0	LIBCERROR_IO_ERROR_READ_FAILED,
431	0	"%s: unable to read compressed grain data.",
432	0	function );
433
434	0	goto on_error;
435	0	}
436	0	if( libvmdk_decompress_data(
437	0	compressed_data,
438	0	(size_t) grain_data->compressed_data_size,
439	0	LIBVMDK_COMPRESSION_METHOD_DEFLATE,
440	0	grain_data->data,
441	0	&( grain_data->data_size ),
442	0	error ) != 1 )
443	0	{
444	0	libcerror_error_set(
445	0	error,
446	0	LIBCERROR_ERROR_DOMAIN_COMPRESSION,
447	0	LIBCERROR_COMPRESSION_ERROR_DECOMPRESS_FAILED,
448	0	"%s: unable to decompress grain data.",
449	0	function );
450
451	0	goto on_error;
452	0	}
453	0	memory_free(
454	0	compressed_data );
455
456	0	compressed_data = NULL;
457	0	}
458	0	else
459	0	{
460	0	if( libvmdk_grain_data_initialize(
461	0	&grain_data,
462	0	(size_t) grain_data_size,
463	0	error ) != 1 )
464	0	{
465	0	libcerror_error_set(
466	0	error,
467	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
468	0	LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
469	0	"%s: unable to create grain data.",
470	0	function );
471
472	0	goto on_error;
473	0	}
474	0	if( grain_data == NULL )
475	0	{
476	0	libcerror_error_set(
477	0	error,
478	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
479	0	LIBCERROR_RUNTIME_ERROR_VALUE_MISSING,
480	0	"%s: missing grain data.",
481	0	function );
482
483	0	goto on_error;
484	0	}
485	0	read_count = libbfio_pool_read_buffer(
486	0	file_io_pool,
487	0	file_io_pool_entry,
488	0	grain_data->data,
489	0	(size_t) grain_data_size,
490	0	error );
491
492	0	if( read_count != (ssize_t) grain_data_size )
493	0	{
494	0	libcerror_error_set(
495	0	error,
496	0	LIBCERROR_ERROR_DOMAIN_IO,
497	0	LIBCERROR_IO_ERROR_READ_FAILED,
498	0	"%s: unable to read grain data.",
499	0	function );
500
501	0	goto on_error;
502	0	}
503	0	}
504	0	if( libfdata_list_element_set_element_value(
505	0	element,
506	0	(intptr_t *) file_io_pool,
507	0	cache,
508	0	(intptr_t *) grain_data,
509	0	(int ()(intptr_t , libcerror_error_t *)) &libvmdk_grain_data_free,
510	0	LIBFDATA_LIST_ELEMENT_VALUE_FLAG_MANAGED,
511	0	error ) != 1 )
512	0	{
513	0	libcerror_error_set(
514	0	error,
515	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
516	0	LIBCERROR_RUNTIME_ERROR_SET_FAILED,
517	0	"%s: unable to set grain data as element value.",
518	0	function );
519
520	0	goto on_error;
521	0	}
522	0	return( 1 );
523
524	0	on_error:
525	0	if( compressed_data != NULL )
526	0	{
527	0	memory_free(
528	0	compressed_data );
529	0	}
530	0	if( grain_data != NULL )
531	0	{
532	0	libvmdk_grain_data_free(
533	0	&grain_data,
534	0	NULL );
535	0	}
536	0	return( -1 );
537	0	}
538