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libewf_filename.c
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libewf_filename.c
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/*
* Filename functions
*
* Copyright (c) 2006-2009, Joachim Metz <forensics@hoffmannbv.nl>,
* Hoffmann Investigations. All rights reserved.
*
* Refer to AUTHORS for acknowledgements.
*
* This software 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 software 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 software. If not, see <http://www.gnu.org/licenses/>.
*/
#include <common.h>
#include <memory.h>
#include <narrow_string.h>
#include <types.h>
#include <wide_string.h>
#include <liberror.h>
#include "libewf_definitions.h"
#include "libewf_filename.h"
#include "libewf_system_string.h"
#include "ewf_definitions.h"
/* Creates the filename extension for a certain segment file
* For EWF-E01, EWF-S01 segment file extension naming schema
* Returns 1 on success or -1 on error
*/
int libewf_filename_set_extension(
char *extension,
uint16_t segment_number,
uint16_t maximum_amount_of_segments,
uint8_t segment_file_type,
uint8_t format,
uint8_t ewf_format,
liberror_error_t **error )
{
static char *function = "libewf_filename_set_extension";
char extension_first_character = 0;
char extension_additional_characters = 0;
if( extension == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid extension.",
function );
return( -1 );
}
if( ( segment_number == 0 )
|| ( segment_number > maximum_amount_of_segments ) )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_OUT_OF_RANGE,
"%s: segment number: %" PRIu16 " is out of range.",
function,
segment_number );
return( -1 );
}
if( segment_file_type == LIBEWF_SEGMENT_FILE_TYPE_EWF )
{
if( ( format == LIBEWF_FORMAT_EWF )
|| ( format == LIBEWF_FORMAT_EWFX ) )
{
extension_first_character = (char) 'e';
extension_additional_characters = (char) 'a';
}
else if( ewf_format == EWF_FORMAT_S01 )
{
extension_first_character = (char) 's';
extension_additional_characters = (char) 'a';
}
else
{
extension_first_character = (char) 'E';
extension_additional_characters = (char) 'A';
}
}
else if( segment_file_type == LIBEWF_SEGMENT_FILE_TYPE_LWF )
{
extension_first_character = (char) 'L';
extension_additional_characters = (char) 'A';
}
else if( segment_file_type == LIBEWF_SEGMENT_FILE_TYPE_DWF )
{
extension_first_character = (char) 'd';
extension_additional_characters = (char) 'a';
}
else
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
"%s: unsupported segment file type.",
function );
return( -1 );
}
extension[ 0 ] = extension_first_character;
if( segment_number <= 99 )
{
extension[ 2 ] = (char) '0' + (char) ( segment_number % 10 );
extension[ 1 ] = (char) '0' + (char) ( segment_number / 10 );
}
else if( segment_number >= 100 )
{
segment_number -= 100;
extension[ 2 ] = extension_additional_characters + (char) ( segment_number % 26 );
segment_number /= 26;
extension[ 1 ] = extension_additional_characters + (char) ( segment_number % 26 );
segment_number /= 26;
if( segment_number >= 26 )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
"%s: unable to support for more segment files.",
function );
return( -1 );
}
extension[ 0 ] = extension_first_character + (char) segment_number;
}
/* Safety check
*/
if( ( extension[ 0 ] > (char) 'z' )
|| ( ( extension[ 0 ] > (char) 'Z' )
&& ( extension[ 0 ] < (char) 'a' ) ) )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
"%s: unable to support for more segment files.",
function );
return( -1 );
}
extension[ 3 ] = 0;
return( 1 );
}
#if defined( HAVE_WIDE_CHARACTER_TYPE )
/* Creates the filename extension for a certain segment file
* For EWF-E01, EWF-S01 segment file extension naming schema
* Returns 1 on success or -1 on error
*/
int libewf_filename_set_extension_wide(
wchar_t *extension,
uint16_t segment_number,
uint16_t maximum_amount_of_segments,
uint8_t segment_file_type,
uint8_t format,
uint8_t ewf_format,
liberror_error_t **error )
{
static char *function = "libewf_filename_set_extension_wide";
wchar_t extension_first_character = 0;
wchar_t extension_additional_characters = 0;
if( extension == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid extension.",
function );
return( -1 );
}
if( ( segment_number == 0 )
|| ( segment_number > maximum_amount_of_segments ) )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_VALUE_OUT_OF_RANGE,
"%s: segment number: %" PRIu16 " is out of range.",
function,
segment_number );
return( -1 );
}
if( segment_file_type == LIBEWF_SEGMENT_FILE_TYPE_EWF )
{
if( ( format == LIBEWF_FORMAT_EWF )
|| ( format == LIBEWF_FORMAT_EWFX ) )
{
extension_first_character = (wchar_t) 'e';
extension_additional_characters = (wchar_t) 'a';
}
else if( ewf_format == EWF_FORMAT_S01 )
{
extension_first_character = (wchar_t) 's';
extension_additional_characters = (wchar_t) 'a';
}
else
{
extension_first_character = (wchar_t) 'E';
extension_additional_characters = (wchar_t) 'A';
}
}
else if( segment_file_type == LIBEWF_SEGMENT_FILE_TYPE_LWF )
{
extension_first_character = (wchar_t) 'L';
extension_additional_characters = (wchar_t) 'A';
}
else if( segment_file_type == LIBEWF_SEGMENT_FILE_TYPE_DWF )
{
extension_first_character = (wchar_t) 'd';
extension_additional_characters = (wchar_t) 'a';
}
else
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_UNSUPPORTED_VALUE,
"%s: unsupported segment file type.",
function );
return( -1 );
}
extension[ 0 ] = extension_first_character;
if( segment_number <= 99 )
{
extension[ 2 ] = (wchar_t) '0' + (wchar_t) ( segment_number % 10 );
extension[ 1 ] = (wchar_t) '0' + (wchar_t) ( segment_number / 10 );
}
else if( segment_number >= 100 )
{
segment_number -= 100;
extension[ 2 ] = extension_additional_characters + (wchar_t) ( segment_number % 26 );
segment_number /= 26;
extension[ 1 ] = extension_additional_characters + (wchar_t) ( segment_number % 26 );
segment_number /= 26;
if( segment_number >= 26 )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
"%s: unable to support for more segment files.",
function );
return( -1 );
}
extension[ 0 ] = extension_first_character + (wchar_t) segment_number;
}
/* Safety check
*/
if( ( extension[ 0 ] > (wchar_t) 'z' )
|| ( ( extension[ 0 ] > (wchar_t) 'Z' )
&& ( extension[ 0 ] < (wchar_t) 'a' ) ) )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_UNSUPPORTED_VALUE,
"%s: unable to support for more segment files.",
function );
return( -1 );
}
extension[ 3 ] = 0;
return( 1 );
}
#endif
/* Creates a filename for a certain segment file
* Returns 1 if successful or -1 on error
*/
int libewf_filename_create(
libewf_system_character_t **filename,
size_t *filename_size,
libewf_system_character_t *basename,
size_t basename_length,
uint16_t segment_number,
uint16_t maximum_amount_of_segments,
uint8_t segment_file_type,
uint8_t format,
uint8_t ewf_format,
liberror_error_t **error )
{
libewf_system_character_t *new_filename = NULL;
static char *function = "libewf_filename_create";
if( filename == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid filename.",
function );
return( -1 );
}
if( *filename != NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: filename already set.",
function );
return( -1 );
}
if( filename_size == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid filename size.",
function );
return( -1 );
}
if( basename == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid basename.",
function );
return( -1 );
}
/* The actual filename also contains a '.', 3 character extension and a end of string byte
*/
new_filename = memory_allocate(
sizeof( libewf_system_character_t ) * ( basename_length + 5 ) );
if( new_filename == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_INSUFFICIENT,
"%s: unable to create filename.",
function );
return( -1 );
}
/* Add one additional character for the end of line
*/
if( libewf_system_string_copy(
new_filename,
basename,
( basename_length + 1 ) ) == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_COPY_FAILED,
"%s: unable to set basename.",
function );
memory_free(
new_filename );
return( -1 );
}
new_filename[ basename_length ] = (libewf_system_character_t) '.';
#if defined( LIBEWF_WIDE_SYSTEM_CHARACTER_TYPE )
if( libewf_filename_set_extension_wide(
&( new_filename[ basename_length + 1 ] ),
segment_number,
maximum_amount_of_segments,
segment_file_type,
format,
ewf_format,
error ) != 1 )
#else
if( libewf_filename_set_extension(
&( new_filename[ basename_length + 1 ] ),
segment_number,
maximum_amount_of_segments,
segment_file_type,
format,
ewf_format,
error ) != 1 )
#endif
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_RUNTIME,
LIBERROR_RUNTIME_ERROR_SET_FAILED,
"%s: unable to set extension.",
function );
memory_free(
new_filename );
return( -1 );
}
*filename = new_filename;
*filename_size = basename_length + 5;
return( 1 );
}

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