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libewf_hash_sections.c
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libewf_hash_sections.c
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/*
* Hash sections 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 "libewf_hash_sections.h"
#include "libewf_notify.h"
/* Initialize the hash sections
* Returns 1 if successful or -1 on error
*/
int libewf_hash_sections_initialize(
libewf_hash_sections_t **hash_sections,
liberror_error_t **error )
{
static char *function = "libewf_hash_sections_initialize";
if( hash_sections == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid hash sections.",
function );
return( -1 );
}
if( *hash_sections == NULL )
{
*hash_sections = (libewf_hash_sections_t *) memory_allocate(
sizeof( libewf_hash_sections_t ) );
if( *hash_sections == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_INSUFFICIENT,
"%s: unable to create hash sections.",
function );
return( -1 );
}
if( memory_set(
*hash_sections,
0,
sizeof( libewf_hash_sections_t ) ) == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_MEMORY,
LIBERROR_MEMORY_ERROR_SET_FAILED,
"%s: unable to clear hash sections.",
function );
memory_free(
*hash_sections );
*hash_sections = NULL;
return( -1 );
}
}
return( 1 );
}
/* Frees the hash sections including elements
* Returns 1 if successful or -1 on error
*/
int libewf_hash_sections_free(
libewf_hash_sections_t **hash_sections,
liberror_error_t **error )
{
static char *function = "libewf_hash_sections_free";
if( hash_sections == NULL )
{
liberror_error_set(
error,
LIBERROR_ERROR_DOMAIN_ARGUMENTS,
LIBERROR_ARGUMENT_ERROR_INVALID_VALUE,
"%s: invalid hash sections.",
function );
return( -1 );
}
if( *hash_sections != NULL )
{
if( ( *hash_sections )->xhash != NULL )
{
memory_free(
( *hash_sections )->xhash );
}
memory_free(
*hash_sections );
*hash_sections = NULL;
}
return( 1 );
}

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