/* * EWF table section * * Copyright (c) 2006-2007, Joachim Metz <forensics@hoffmannbv.nl>, * Hoffmann Investigations. All rights reserved. * * Refer to AUTHORS for acknowledgements. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * - Redistributions of source code must retain the above copyright notice, *   this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright notice, *   this list of conditions and the following disclaimer in the documentation *   and/or other materials provided with the distribution. * - Neither the name of the creator, related organisations, nor the names of *   its contributors may be used to endorse or promote products derived from *   this software without specific prior written permission. * - All advertising materials mentioning features or use of this software *   must acknowledge the contribution by people stated in the acknowledgements. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER, COMPANY AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */#include "libewf_includes.h"#include <libewf/libewf_definitions.h>#include "libewf_common.h"#include "libewf_endian.h"#include "libewf_notify.h"#include "ewf_crc.h"#include "ewf_table.h"/* Reads the table from a file descriptor * Returns the amount of bytes read, or -1 on error */ssize_t ewf_table_read( EWF_TABLE *table, int file_descriptor ){	ssize_t count = 0;	size_t size   = EWF_TABLE_SIZE;	if( table == NULL )	{		LIBEWF_WARNING_PRINT( "ewf_table_read: invalid table.\n" );		return( -1 );	}	count = libewf_common_read( file_descriptor, table, size );	if( count < (ssize_t) size )	{		LIBEWF_WARNING_PRINT( "ewf_table_read: unable to read table.\n" );		return( -1 );	}	return( count );}/* Reads the ewf table offsets from a file descriptor * Returns the amount of bytes read, or -1 on error */ssize_t ewf_table_offsets_read( EWF_TABLE_OFFSET *offsets, int file_descriptor, uint32_t amount ){	ssize_t count = 0;	size_t size   = EWF_TABLE_OFFSET_SIZE * amount;	if( offsets == NULL )	{		LIBEWF_WARNING_PRINT( "ewf_table_offsets_read: invalid table offsets.\n" );		return( -1 );	}	count = libewf_common_read( file_descriptor, offsets, size );	if( count < (ssize_t) size )	{		LIBEWF_WARNING_PRINT( "ewf_table_offsets_read: unable to read offsets.\n" );		return( -1 );	}	return( count );}/* Writes the table to a file descriptor * Returns the amount of bytes written, or -1 on error */ssize_t ewf_table_write( EWF_TABLE *table, int file_descriptor ){	EWF_CRC crc   = 0;	ssize_t count = 0;	size_t size   = EWF_TABLE_SIZE;	if( table == NULL )	{		LIBEWF_WARNING_PRINT( "ewf_table_write: invalid table.\n" );		return( -1 );	}	if( ewf_crc_calculate( &crc, (uint8_t *) table, ( size - EWF_CRC_SIZE ), 1 ) != 1 )	{		LIBEWF_WARNING_PRINT( "ewf_table_write: unable to calculate CRC.\n" );		return( -1 );	}	if( libewf_endian_revert_32bit( crc, table->crc ) != 1 )	{		LIBEWF_WARNING_PRINT( "ewf_table_write: unable to revert CRC value.\n" );		return( -1 );	}	count = libewf_common_write( file_descriptor, table, size );	if( count < (ssize_t) size )	{		LIBEWF_WARNING_PRINT( "ewf_table_write: error writing table.\n" );		return( -1 );	}	return( count );}/* Writes the offsets to a file descriptor * Returns the amount of bytes written, or -1 on error */ssize_t ewf_table_offsets_write( EWF_TABLE_OFFSET *offsets, int file_descriptor, uint32_t amount, uint8_t write_crc ){	EWF_CRC crc       = 0;	ssize_t count     = 0;	ssize_t crc_count = 0;	size_t size       = EWF_TABLE_OFFSET_SIZE * amount;	if( offsets == NULL )	{		LIBEWF_WARNING_PRINT( "ewf_table_offsets_write: invalid offsets.\n" );		return( -1 );	}	count = libewf_common_write( file_descriptor, offsets, size );	if( count < (ssize_t) size )	{		LIBEWF_WARNING_PRINT( "ewf_table_offsets_write: unable to write table offsets.\n" );		return( -1 );	}	if( write_crc == 1 )	{		if( ewf_crc_calculate( &crc, (uint8_t *) offsets, size, 1 ) != 1 )		{			LIBEWF_WARNING_PRINT( "ewf_table_offsets_write: unable to calculate CRC.\n" );			return( -1 );		}		crc_count = ewf_crc_write( &crc, file_descriptor );		if( crc_count == -1 )		{			LIBEWF_WARNING_PRINT( "ewf_table_offsets_write: unable to write CRC.\n" );			return( -1 );		}	}	return( count + crc_count );}