/src/libfsext/libfsext/libfsext_attributes_block.c

Source
/*
 * Extended attributes block functions
 *
 * Copyright (C) 2010-2025, 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 "libfsext_attribute_values.h"
#include "libfsext_attributes_block.h"
#include "libfsext_debug.h"
#include "libfsext_io_handle.h"
#include "libfsext_libbfio.h"
#include "libfsext_libcdata.h"
#include "libfsext_libcerror.h"
#include "libfsext_libcnotify.h"

#include "fsext_attributes.h"

/* Reads the extended attributes block header data
 * Returns 1 if successful or -1 on error
 */
int libfsext_attributes_block_read_header_data(
     libfsext_io_handle_t *io_handle,
     const uint8_t *data,
     size_t data_size,
     libcerror_error_t **error )
{
  static char *function     = "libfsext_attributes_block_read_header_data";
  uint32_t number_of_blocks = 0;
  uint32_t signature        = 0;

#if defined( HAVE_DEBUG_OUTPUT )
  uint32_t value_32bit      = 0;
#endif

  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( ( data_size < sizeof( fsext_attributes_header_ext2_t ) )
   || ( data_size > (size_t) SSIZE_MAX ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_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: extended attributes block header data:\n",
     function );
    libcnotify_print_data(
     data,
     sizeof( fsext_attributes_header_ext2_t ),
     LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );
  }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_attributes_header_ext2_t *) data )->signature,
   signature );

  byte_stream_copy_to_uint32_little_endian(
   ( (fsext_attributes_header_ext2_t *) data )->number_of_blocks,
   number_of_blocks );

#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: signature\t\t\t: 0x%08" PRIx32 "\n",
     function,
     signature );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_attributes_header_ext2_t *) data )->reference_count,
     value_32bit );
    libcnotify_printf(
     "%s: reference count\t\t: %" PRIu32 "\n",
     function,
     value_32bit );

    libcnotify_printf(
     "%s: number of blocks\t\t: %" PRIu32 "\n",
     function,
     number_of_blocks );

    byte_stream_copy_to_uint32_little_endian(
     ( (fsext_attributes_header_ext2_t *) data )->attributes_hash,
     value_32bit );
    libcnotify_printf(
     "%s: attributes hash\t\t: 0x%08" PRIx32 "\n",
     function,
     value_32bit );

    if( ( io_handle->format_version == 2 )
     || ( io_handle->format_version == 3 ) )
    {
      libcnotify_printf(
       "%s: unknown1:\n",
       function );
      libcnotify_print_data(
       ( (fsext_attributes_header_ext2_t *) data )->unknown1,
       16,
       0 );
    }
    else if( io_handle->format_version == 4 )
    {
      byte_stream_copy_to_uint32_little_endian(
       ( (fsext_attributes_header_ext4_t *) data )->checksum,
       value_32bit );
      libcnotify_printf(
       "%s: checksum\t\t\t: 0x%08" PRIx32 "\n",
       function,
       value_32bit );

      libcnotify_printf(
       "%s: unknown1:\n",
       function );
      libcnotify_print_data(
       ( (fsext_attributes_header_ext4_t *) data )->unknown1,
       12,
       0 );
    }
  }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

  if( signature != 0xea020000UL )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
     "%s: invalid signature.",
     function );

    return( -1 );
  }
  if( number_of_blocks != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid number of blocks value out of bounds.",
     function );

    return( -1 );
  }
  return( 1 );
}

/* Reads the extended attributes block entries data
 * Returns 1 if successful or -1 on error
 */
int libfsext_attributes_block_read_entries_data(
     const uint8_t *data,
     size_t data_size,
     size_t data_offset,
     libcdata_array_t *extended_attributes,
     libcerror_error_t **error )
{
  libfsext_attribute_values_t *attribute_values = NULL;
  static char *function                         = "libfsext_attributes_block_read_entries_data";
  size_t alignment_padding_size                 = 0;
  int attribute_index                           = 0;
  int entry_index                               = 0;

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

    return( -1 );
  }
  if( ( data_size < sizeof( fsext_attributes_entry_t ) )
   || ( data_size > (size_t) SSIZE_MAX ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid data size value out of bounds.",
     function );

    return( -1 );
  }
  if( data_offset >= ( data_size - sizeof( fsext_attributes_entry_t ) ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_RUNTIME,
     LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid data offset value out of bounds.",
     function );

    return( -1 );
  }
  while( data_offset < data_size )
  {
    if( data_offset >= ( data_size - sizeof( fsext_attributes_entry_t ) ) )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
       "%s: invalid data size value out of bounds.",
       function );

      goto on_error;
    }
    /* The list terminator has the first 4 values set to 0 (8 bytes).
     * Note that some implementations of older Android versions of ext appear to
     * only set the first 4 bytes to 0.
     */
    if( memory_compare(
         &( data[ data_offset ] ),
         "\x00\x00\x00\x00",
         4 ) == 0 )
    {
#if defined( HAVE_DEBUG_OUTPUT )
      if( libcnotify_verbose != 0 )
      {
        libcnotify_printf(
         "%s: extended attributes entry: %d data:\n",
         function,
         attribute_index );
        libcnotify_print_data(
         &( data[ data_offset ] ),
         sizeof( fsext_attributes_entry_t ),
         LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );
      }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

      break;
    }
    if( libfsext_attribute_values_initialize(
         &attribute_values,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
       "%s: unable to create attribute: %d values.",
       function,
       attribute_index );

      goto on_error;
    }
    if( libfsext_attribute_values_read_data(
         attribute_values,
         &( data[ data_offset ] ),
         data_size - data_offset,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_IO,
       LIBCERROR_IO_ERROR_READ_FAILED,
       "%s: unable to read attribute: %d values.",
       function,
       attribute_index );

      goto on_error;
    }
    data_offset += sizeof( fsext_attributes_entry_t ) + data[ data_offset ];

    alignment_padding_size = data_offset % 4;

    if( alignment_padding_size != 0 )
    {
      alignment_padding_size = 4 - alignment_padding_size;
    }
    if( alignment_padding_size > 0 )
    {
#if defined( HAVE_DEBUG_OUTPUT )
      if( libcnotify_verbose != 0 )
      {
        libcnotify_printf(
         "%s: alignment padding:\n",
         function );
        libcnotify_print_data(
         &( data[ data_offset ] ),
         alignment_padding_size,
         0 );
      }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

      data_offset += alignment_padding_size;
    }
    if( ( attribute_values->value_data_inode_number == 0 )
     && ( attribute_values->value_data_size > 0 ) )
    {
      if( ( attribute_values->value_data_offset < sizeof( fsext_attributes_header_ext2_t ) )
       || ( attribute_values->value_data_offset >= data_size ) )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
         "%s: invalid value data offset value out of bounds.",
         function );

        goto on_error;
      }
      if( attribute_values->value_data_size > ( data_size - attribute_values->value_data_offset ) )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_RUNTIME,
         LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
         "%s: invalid value data size value out of bounds.",
         function );

        goto on_error;
      }
#if defined( HAVE_DEBUG_OUTPUT )
      if( libcnotify_verbose != 0 )
      {
        libcnotify_printf(
         "%s: attribute: %d value data:\n",
         function,
         attribute_index );
        libcnotify_print_data(
         &( data[ attribute_values->value_data_offset ] ),
         attribute_values->value_data_size,
         0 );
      }
#endif /* defined( HAVE_DEBUG_OUTPUT ) */

      attribute_values->value_data = (uint8_t *) memory_allocate(
                                                  sizeof( uint8_t ) * attribute_values->value_data_size );

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

        goto on_error;
      }
      if( memory_copy(
           attribute_values->value_data,
           &( data[ attribute_values->value_data_offset ] ),
           (size_t) attribute_values->value_data_size ) == NULL )
      {
        libcerror_error_set(
         error,
         LIBCERROR_ERROR_DOMAIN_MEMORY,
         LIBCERROR_MEMORY_ERROR_COPY_FAILED,
         "%s: unable to copy value data to attribute values.",
         function );

        goto on_error;
      }
    }
    if( libcdata_array_append_entry(
         extended_attributes,
         &entry_index,
         (intptr_t *) attribute_values,
         error ) != 1 )
    {
      libcerror_error_set(
       error,
       LIBCERROR_ERROR_DOMAIN_RUNTIME,
       LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,
       "%s: unable to append attribute: %d values to array.",
       function,
       attribute_index );

      goto on_error;
    }
    attribute_values = NULL;

    attribute_index++;
  }
  return( 1 );

on_error:
  if( attribute_values != NULL )
  {
    libfsext_attribute_values_free(
     &attribute_values,
     NULL );
  }
  libcdata_array_empty(
   extended_attributes,
   (int (*)(intptr_t **, libcerror_error_t **)) &libfsext_attribute_values_free,
   NULL );

  return( -1 );
}

/* Reads the extended attributes block from a Basic File IO (bfio) handle
 * Returns 1 if successful or -1 on error
 */
int libfsext_attributes_block_read_file_io_handle(
     libcdata_array_t *extended_attributes,
     libfsext_io_handle_t *io_handle,
     libbfio_handle_t *file_io_handle,
     off64_t file_offset,
     libcerror_error_t **error )
{
  uint8_t *data         = NULL;
  static char *function = "libfsext_attributes_block_read_file_io_handle";
  ssize_t read_count    = 0;

  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( ( io_handle->block_size == 0 )
   || ( io_handle->block_size > (uint32_t) MEMORY_MAXIMUM_ALLOCATION_SIZE ) )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
     LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
     "%s: invalid IO handle - block size value out of bounds.",
     function );

    return( -1 );
  }
  data = (uint8_t *) memory_allocate(
                      sizeof( uint8_t ) * io_handle->block_size );

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

    goto on_error;
  }
#if defined( HAVE_DEBUG_OUTPUT )
  if( libcnotify_verbose != 0 )
  {
    libcnotify_printf(
     "%s: reading extended attributes block at offset: %" PRIi64 " (0x%08" PRIx64 ")\n",
     function,
     file_offset,
     file_offset );
  }
#endif
  read_count = libbfio_handle_read_buffer_at_offset(
                file_io_handle,
                data,
                (size_t) io_handle->block_size,
                file_offset,
                error );

  if( read_count != (ssize_t) io_handle->block_size )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_IO,
     LIBCERROR_IO_ERROR_READ_FAILED,
     "%s: unable to read extended attributes block data at offset: %" PRIi64 " (0x%08" PRIx64 ").",
     function,
     file_offset,
     file_offset );

    goto on_error;
  }
  if( libfsext_attributes_block_read_header_data(
       io_handle,
       data,
       (size_t) io_handle->block_size,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_IO,
     LIBCERROR_IO_ERROR_READ_FAILED,
     "%s: unable to read extended attributes block header.",
     function );

    goto on_error;
  }
  if( libfsext_attributes_block_read_entries_data(
       data,
       (size_t) io_handle->block_size,
       sizeof( fsext_attributes_header_ext2_t ),
       extended_attributes,
       error ) != 1 )
  {
    libcerror_error_set(
     error,
     LIBCERROR_ERROR_DOMAIN_IO,
     LIBCERROR_IO_ERROR_READ_FAILED,
     "%s: unable to read extended attributes block entries.",
     function );

    goto on_error;
  }
  memory_free(
   data );

  return( 1 );

on_error:
  if( data != NULL )
  {
    memory_free(
     data );
  }
  return( -1 );
}


Coverage Report

Created: 2026-01-13 07:09

Line	Count	Source
1		/*
2		* Extended attributes block functions
3		*
4		* Copyright (C) 2010-2025, 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 "libfsext_attribute_values.h"
28		#include "libfsext_attributes_block.h"
29		#include "libfsext_debug.h"
30		#include "libfsext_io_handle.h"
31		#include "libfsext_libbfio.h"
32		#include "libfsext_libcdata.h"
33		#include "libfsext_libcerror.h"
34		#include "libfsext_libcnotify.h"
35
36		#include "fsext_attributes.h"
37
38		/* Reads the extended attributes block header data
39		* Returns 1 if successful or -1 on error
40		*/
41		int libfsext_attributes_block_read_header_data(
42		libfsext_io_handle_t *io_handle,
43		const uint8_t *data,
44		size_t data_size,
45		libcerror_error_t **error )
46	73	{
47	73	static char *function = "libfsext_attributes_block_read_header_data";
48	73	uint32_t number_of_blocks = 0;
49	73	uint32_t signature = 0;
50
51		#if defined( HAVE_DEBUG_OUTPUT )
52		uint32_t value_32bit = 0;
53		#endif
54
55	73	if( io_handle == NULL )
56	0	{
57	0	libcerror_error_set(
58	0	error,
59	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
60	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
61	0	"%s: invalid IO handle.",
62	0	function );
63
64	0	return( -1 );
65	0	}
66	73	if( data == NULL )
67	0	{
68	0	libcerror_error_set(
69	0	error,
70	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
71	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
72	0	"%s: invalid data.",
73	0	function );
74
75	0	return( -1 );
76	0	}
77	73	if( ( data_size < sizeof( fsext_attributes_header_ext2_t ) )
78	73	\|\| ( data_size > (size_t) SSIZE_MAX ) )
79	0	{
80	0	libcerror_error_set(
81	0	error,
82	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
83	0	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
84	0	"%s: invalid data size value out of bounds.",
85	0	function );
86
87	0	return( -1 );
88	0	}
89		#if defined( HAVE_DEBUG_OUTPUT )
90		if( libcnotify_verbose != 0 )
91		{
92		libcnotify_printf(
93		"%s: extended attributes block header data:\n",
94		function );
95		libcnotify_print_data(
96		data,
97		sizeof( fsext_attributes_header_ext2_t ),
98		LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );
99		}
100		#endif /* defined( HAVE_DEBUG_OUTPUT ) */
101
102	73	byte_stream_copy_to_uint32_little_endian(
103	73	( (fsext_attributes_header_ext2_t *) data )->signature,
104	73	signature );
105
106	73	byte_stream_copy_to_uint32_little_endian(
107	73	( (fsext_attributes_header_ext2_t *) data )->number_of_blocks,
108	73	number_of_blocks );
109
110		#if defined( HAVE_DEBUG_OUTPUT )
111		if( libcnotify_verbose != 0 )
112		{
113		libcnotify_printf(
114		"%s: signature\t\t\t: 0x%08" PRIx32 "\n",
115		function,
116		signature );
117
118		byte_stream_copy_to_uint32_little_endian(
119		( (fsext_attributes_header_ext2_t *) data )->reference_count,
120		value_32bit );
121		libcnotify_printf(
122		"%s: reference count\t\t: %" PRIu32 "\n",
123		function,
124		value_32bit );
125
126		libcnotify_printf(
127		"%s: number of blocks\t\t: %" PRIu32 "\n",
128		function,
129		number_of_blocks );
130
131		byte_stream_copy_to_uint32_little_endian(
132		( (fsext_attributes_header_ext2_t *) data )->attributes_hash,
133		value_32bit );
134		libcnotify_printf(
135		"%s: attributes hash\t\t: 0x%08" PRIx32 "\n",
136		function,
137		value_32bit );
138
139		if( ( io_handle->format_version == 2 )
140		\|\| ( io_handle->format_version == 3 ) )
141		{
142		libcnotify_printf(
143		"%s: unknown1:\n",
144		function );
145		libcnotify_print_data(
146		( (fsext_attributes_header_ext2_t *) data )->unknown1,
147		16,
148		0 );
149		}
150		else if( io_handle->format_version == 4 )
151		{
152		byte_stream_copy_to_uint32_little_endian(
153		( (fsext_attributes_header_ext4_t *) data )->checksum,
154		value_32bit );
155		libcnotify_printf(
156		"%s: checksum\t\t\t: 0x%08" PRIx32 "\n",
157		function,
158		value_32bit );
159
160		libcnotify_printf(
161		"%s: unknown1:\n",
162		function );
163		libcnotify_print_data(
164		( (fsext_attributes_header_ext4_t *) data )->unknown1,
165		12,
166		0 );
167		}
168		}
169		#endif /* defined( HAVE_DEBUG_OUTPUT ) */
170
171	73	if( signature != 0xea020000UL )
172	43	{
173	43	libcerror_error_set(
174	43	error,
175	43	LIBCERROR_ERROR_DOMAIN_RUNTIME,
176	43	LIBCERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
177	43	"%s: invalid signature.",
178	43	function );
179
180	43	return( -1 );
181	43	}
182	30	if( number_of_blocks != 1 )
183	24	{
184	24	libcerror_error_set(
185	24	error,
186	24	LIBCERROR_ERROR_DOMAIN_RUNTIME,
187	24	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
188	24	"%s: invalid number of blocks value out of bounds.",
189	24	function );
190
191	24	return( -1 );
192	24	}
193	6	return( 1 );
194	30	}
195
196		/* Reads the extended attributes block entries data
197		* Returns 1 if successful or -1 on error
198		*/
199		int libfsext_attributes_block_read_entries_data(
200		const uint8_t *data,
201		size_t data_size,
202		size_t data_offset,
203		libcdata_array_t *extended_attributes,
204		libcerror_error_t **error )
205	303	{
206	303	libfsext_attribute_values_t *attribute_values = NULL;
207	303	static char *function = "libfsext_attributes_block_read_entries_data";
208	303	size_t alignment_padding_size = 0;
209	303	int attribute_index = 0;
210	303	int entry_index = 0;
211
212	303	if( data == NULL )
213	0	{
214	0	libcerror_error_set(
215	0	error,
216	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
217	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
218	0	"%s: invalid data.",
219	0	function );
220
221	0	return( -1 );
222	0	}
223	303	if( ( data_size < sizeof( fsext_attributes_entry_t ) )
224	300	\|\| ( data_size > (size_t) SSIZE_MAX ) )
225	3	{
226	3	libcerror_error_set(
227	3	error,
228	3	LIBCERROR_ERROR_DOMAIN_RUNTIME,
229	3	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
230	3	"%s: invalid data size value out of bounds.",
231	3	function );
232
233	3	return( -1 );
234	3	}
235	300	if( data_offset >= ( data_size - sizeof( fsext_attributes_entry_t ) ) )
236	2	{
237	2	libcerror_error_set(
238	2	error,
239	2	LIBCERROR_ERROR_DOMAIN_RUNTIME,
240	2	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
241	2	"%s: invalid data offset value out of bounds.",
242	2	function );
243
244	2	return( -1 );
245	2	}
246	2.33k	while( data_offset < data_size )
247	2.23k	{
248	2.23k	if( data_offset >= ( data_size - sizeof( fsext_attributes_entry_t ) ) )
249	10	{
250	10	libcerror_error_set(
251	10	error,
252	10	LIBCERROR_ERROR_DOMAIN_RUNTIME,
253	10	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
254	10	"%s: invalid data size value out of bounds.",
255	10	function );
256
257	10	goto on_error;
258	10	}
259		/* The list terminator has the first 4 values set to 0 (8 bytes).
260		* Note that some implementations of older Android versions of ext appear to
261		* only set the first 4 bytes to 0.
262		*/
263	2.22k	if( memory_compare(
264	2.22k	&( data[ data_offset ] ),
265	2.22k	"\x00\x00\x00\x00",
266	2.22k	4 ) == 0 )
267	61	{
268		#if defined( HAVE_DEBUG_OUTPUT )
269		if( libcnotify_verbose != 0 )
270		{
271		libcnotify_printf(
272		"%s: extended attributes entry: %d data:\n",
273		function,
274		attribute_index );
275		libcnotify_print_data(
276		&( data[ data_offset ] ),
277		sizeof( fsext_attributes_entry_t ),
278		LIBCNOTIFY_PRINT_DATA_FLAG_GROUP_DATA );
279		}
280		#endif /* defined( HAVE_DEBUG_OUTPUT ) */
281
282	61	break;
283	61	}
284	2.15k	if( libfsext_attribute_values_initialize(
285	2.15k	&attribute_values,
286	2.15k	error ) != 1 )
287	0	{
288	0	libcerror_error_set(
289	0	error,
290	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
291	0	LIBCERROR_RUNTIME_ERROR_INITIALIZE_FAILED,
292	0	"%s: unable to create attribute: %d values.",
293	0	function,
294	0	attribute_index );
295
296	0	goto on_error;
297	0	}
298	2.15k	if( libfsext_attribute_values_read_data(
299	2.15k	attribute_values,
300	2.15k	&( data[ data_offset ] ),
301	2.15k	data_size - data_offset,
302	2.15k	error ) != 1 )
303	25	{
304	25	libcerror_error_set(
305	25	error,
306	25	LIBCERROR_ERROR_DOMAIN_IO,
307	25	LIBCERROR_IO_ERROR_READ_FAILED,
308	25	"%s: unable to read attribute: %d values.",
309	25	function,
310	25	attribute_index );
311
312	25	goto on_error;
313	25	}
314	2.13k	data_offset += sizeof( fsext_attributes_entry_t ) + data[ data_offset ];
315
316	2.13k	alignment_padding_size = data_offset % 4;
317
318	2.13k	if( alignment_padding_size != 0 )
319	900	{
320	900	alignment_padding_size = 4 - alignment_padding_size;
321	900	}
322	2.13k	if( alignment_padding_size > 0 )
323	900	{
324		#if defined( HAVE_DEBUG_OUTPUT )
325		if( libcnotify_verbose != 0 )
326		{
327		libcnotify_printf(
328		"%s: alignment padding:\n",
329		function );
330		libcnotify_print_data(
331		&( data[ data_offset ] ),
332		alignment_padding_size,
333		0 );
334		}
335		#endif /* defined( HAVE_DEBUG_OUTPUT ) */
336
337	900	data_offset += alignment_padding_size;
338	900	}
339	2.13k	if( ( attribute_values->value_data_inode_number == 0 )
340	435	&& ( attribute_values->value_data_size > 0 ) )
341	248	{
342	248	if( ( attribute_values->value_data_offset < sizeof( fsext_attributes_header_ext2_t ) )
343	234	\|\| ( attribute_values->value_data_offset >= data_size ) )
344	52	{
345	52	libcerror_error_set(
346	52	error,
347	52	LIBCERROR_ERROR_DOMAIN_RUNTIME,
348	52	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
349	52	"%s: invalid value data offset value out of bounds.",
350	52	function );
351
352	52	goto on_error;
353	52	}
354	196	if( attribute_values->value_data_size > ( data_size - attribute_values->value_data_offset ) )
355	45	{
356	45	libcerror_error_set(
357	45	error,
358	45	LIBCERROR_ERROR_DOMAIN_RUNTIME,
359	45	LIBCERROR_RUNTIME_ERROR_VALUE_OUT_OF_BOUNDS,
360	45	"%s: invalid value data size value out of bounds.",
361	45	function );
362
363	45	goto on_error;
364	45	}
365		#if defined( HAVE_DEBUG_OUTPUT )
366		if( libcnotify_verbose != 0 )
367		{
368		libcnotify_printf(
369		"%s: attribute: %d value data:\n",
370		function,
371		attribute_index );
372		libcnotify_print_data(
373		&( data[ attribute_values->value_data_offset ] ),
374		attribute_values->value_data_size,
375		0 );
376		}
377		#endif /* defined( HAVE_DEBUG_OUTPUT ) */
378
379	151	attribute_values->value_data = (uint8_t *) memory_allocate(
380	151	sizeof( uint8_t ) * attribute_values->value_data_size );
381
382	151	if( attribute_values->value_data == NULL )
383	0	{
384	0	libcerror_error_set(
385	0	error,
386	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
387	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
388	0	"%s: unable to create value data.",
389	0	function );
390
391	0	goto on_error;
392	0	}
393	151	if( memory_copy(
394	151	attribute_values->value_data,
395	151	&( data[ attribute_values->value_data_offset ] ),
396	151	(size_t) attribute_values->value_data_size ) == NULL )
397	0	{
398	0	libcerror_error_set(
399	0	error,
400	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
401	0	LIBCERROR_MEMORY_ERROR_COPY_FAILED,
402	0	"%s: unable to copy value data to attribute values.",
403	0	function );
404
405	0	goto on_error;
406	0	}
407	151	}
408	2.03k	if( libcdata_array_append_entry(
409	2.03k	extended_attributes,
410	2.03k	&entry_index,
411	2.03k	(intptr_t *) attribute_values,
412	2.03k	error ) != 1 )
413	0	{
414	0	libcerror_error_set(
415	0	error,
416	0	LIBCERROR_ERROR_DOMAIN_RUNTIME,
417	0	LIBCERROR_RUNTIME_ERROR_APPEND_FAILED,
418	0	"%s: unable to append attribute: %d values to array.",
419	0	function,
420	0	attribute_index );
421
422	0	goto on_error;
423	0	}
424	2.03k	attribute_values = NULL;
425
426	2.03k	attribute_index++;
427	2.03k	}
428	166	return( 1 );
429
430	132	on_error:
431	132	if( attribute_values != NULL )
432	122	{
433	122	libfsext_attribute_values_free(
434	122	&attribute_values,
435	122	NULL );
436	122	}
437	132	libcdata_array_empty(
438	132	extended_attributes,
439	132	(int ()(intptr_t , libcerror_error_t *)) &libfsext_attribute_values_free,
440	132	NULL );
441
442	132	return( -1 );
443	298	}
444
445		/* Reads the extended attributes block from a Basic File IO (bfio) handle
446		* Returns 1 if successful or -1 on error
447		*/
448		int libfsext_attributes_block_read_file_io_handle(
449		libcdata_array_t *extended_attributes,
450		libfsext_io_handle_t *io_handle,
451		libbfio_handle_t *file_io_handle,
452		off64_t file_offset,
453		libcerror_error_t **error )
454	178	{
455	178	uint8_t *data = NULL;
456	178	static char *function = "libfsext_attributes_block_read_file_io_handle";
457	178	ssize_t read_count = 0;
458
459	178	if( io_handle == NULL )
460	0	{
461	0	libcerror_error_set(
462	0	error,
463	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
464	0	LIBCERROR_ARGUMENT_ERROR_INVALID_VALUE,
465	0	"%s: invalid IO handle.",
466	0	function );
467
468	0	return( -1 );
469	0	}
470	178	if( ( io_handle->block_size == 0 )
471	178	\|\| ( io_handle->block_size > (uint32_t) MEMORY_MAXIMUM_ALLOCATION_SIZE ) )
472	0	{
473	0	libcerror_error_set(
474	0	error,
475	0	LIBCERROR_ERROR_DOMAIN_ARGUMENTS,
476	0	LIBCERROR_ARGUMENT_ERROR_VALUE_OUT_OF_BOUNDS,
477	0	"%s: invalid IO handle - block size value out of bounds.",
478	0	function );
479
480	0	return( -1 );
481	0	}
482	178	data = (uint8_t *) memory_allocate(
483	178	sizeof( uint8_t ) * io_handle->block_size );
484
485	178	if( data == NULL )
486	0	{
487	0	libcerror_error_set(
488	0	error,
489	0	LIBCERROR_ERROR_DOMAIN_MEMORY,
490	0	LIBCERROR_MEMORY_ERROR_INSUFFICIENT,
491	0	"%s: unable to create data.",
492	0	function );
493
494	0	goto on_error;
495	0	}
496		#if defined( HAVE_DEBUG_OUTPUT )
497		if( libcnotify_verbose != 0 )
498		{
499		libcnotify_printf(
500		"%s: reading extended attributes block at offset: %" PRIi64 " (0x%08" PRIx64 ")\n",
501		function,
502		file_offset,
503		file_offset );
504		}
505		#endif
506	178	read_count = libbfio_handle_read_buffer_at_offset(
507	178	file_io_handle,
508	178	data,
509	178	(size_t) io_handle->block_size,
510	178	file_offset,
511	178	error );
512
513	178	if( read_count != (ssize_t) io_handle->block_size )
514	105	{
515	105	libcerror_error_set(
516	105	error,
517	105	LIBCERROR_ERROR_DOMAIN_IO,
518	105	LIBCERROR_IO_ERROR_READ_FAILED,
519	105	"%s: unable to read extended attributes block data at offset: %" PRIi64 " (0x%08" PRIx64 ").",
520	105	function,
521	105	file_offset,
522	105	file_offset );
523
524	105	goto on_error;
525	105	}
526	73	if( libfsext_attributes_block_read_header_data(
527	73	io_handle,
528	73	data,
529	73	(size_t) io_handle->block_size,
530	73	error ) != 1 )
531	67	{
532	67	libcerror_error_set(
533	67	error,
534	67	LIBCERROR_ERROR_DOMAIN_IO,
535	67	LIBCERROR_IO_ERROR_READ_FAILED,
536	67	"%s: unable to read extended attributes block header.",
537	67	function );
538
539	67	goto on_error;
540	67	}
541	6	if( libfsext_attributes_block_read_entries_data(
542	6	data,
543	6	(size_t) io_handle->block_size,
544	6	sizeof( fsext_attributes_header_ext2_t ),
545	6	extended_attributes,
546	6	error ) != 1 )
547	2	{
548	2	libcerror_error_set(
549	2	error,
550	2	LIBCERROR_ERROR_DOMAIN_IO,
551	2	LIBCERROR_IO_ERROR_READ_FAILED,
552	2	"%s: unable to read extended attributes block entries.",
553	2	function );
554
555	2	goto on_error;
556	2	}
557	4	memory_free(
558	4	data );
559
560	4	return( 1 );
561
562	174	on_error:
563	174	if( data != NULL )
564	174	{
565	174	memory_free(
566	174	data );
567	174	}
568	174	return( -1 );
569	6	}
570