181 lines
7.1 KiB
C
181 lines
7.1 KiB
C
/*
|
|
|
|
File: file_bld.c
|
|
|
|
Copyright (C) 2006-2008 Christophe GRENIER <grenier@cgsecurity.org>
|
|
|
|
This software is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2 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 General Public License along
|
|
with this program; if not, write the Free Software Foundation, Inc., 51
|
|
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
#include <config.h>
|
|
#endif
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
#include <stdio.h>
|
|
#include "types.h"
|
|
#include "filegen.h"
|
|
#include "log.h"
|
|
|
|
static void register_header_check_blend(file_stat_t *file_stat);
|
|
static int header_check_blend(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new);
|
|
static int data_check_blend4le(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery);
|
|
static int data_check_blend8le(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery);
|
|
static int data_check_blend4be(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery);
|
|
static int data_check_blend8be(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery);
|
|
|
|
const file_hint_t file_hint_blend= {
|
|
.extension="blend",
|
|
.description="blender",
|
|
.min_header_distance=0,
|
|
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
|
|
.recover=1,
|
|
.enable_by_default=1,
|
|
.register_header_check=®ister_header_check_blend
|
|
};
|
|
|
|
static const unsigned char blend_header[7] = { 'B', 'L', 'E', 'N', 'D', 'E', 'R'};
|
|
static const unsigned char blend_header_footer[4] = { 'E', 'N', 'D', 'B'};
|
|
|
|
static void register_header_check_blend(file_stat_t *file_stat)
|
|
{
|
|
register_header_check(0, blend_header,sizeof(blend_header), &header_check_blend, file_stat);
|
|
}
|
|
|
|
static int header_check_blend(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
|
|
{
|
|
if(memcmp(buffer,blend_header,sizeof(blend_header))==0 && (buffer[7]=='_' || buffer[7]=='-'))
|
|
{
|
|
reset_file_recovery(file_recovery_new);
|
|
file_recovery_new->calculated_file_size=12;
|
|
if(buffer[8]=='v')
|
|
{ /* Little endian */
|
|
if(buffer[7]=='_')
|
|
file_recovery_new->data_check=&data_check_blend4le;
|
|
else
|
|
file_recovery_new->data_check=&data_check_blend8le;
|
|
}
|
|
else
|
|
{ /* Big endian */
|
|
if(buffer[7]=='_')
|
|
file_recovery_new->data_check=&data_check_blend4be;
|
|
else
|
|
file_recovery_new->data_check=&data_check_blend8be;
|
|
}
|
|
file_recovery_new->extension=file_hint_blend.extension;
|
|
file_recovery_new->file_check=&file_check_size;
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int data_check_blend4le(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
|
|
{
|
|
while(file_recovery->calculated_file_size + buffer_size/2 >= file_recovery->file_size &&
|
|
file_recovery->calculated_file_size + 0x14 < file_recovery->file_size + buffer_size/2)
|
|
{
|
|
unsigned int len;
|
|
unsigned int i=file_recovery->calculated_file_size - file_recovery->file_size + buffer_size/2;
|
|
len=buffer[i+4]+ ((buffer[i+5])<<8)+ ((buffer[i+6])<<16)+ ((buffer[i+7])<<24);
|
|
#ifdef DEBUG_BLEND
|
|
log_debug("file_mov.c: atom %c%c%c%c (0x%02x%02x%02x%02x) size %u, calculated_file_size %llu\n",
|
|
buffer[i+0],buffer[i+1],buffer[i+2],buffer[i+3],
|
|
buffer[i+0],buffer[i+1],buffer[i+2],buffer[i+3],
|
|
len,
|
|
(long long unsigned)file_recovery->calculated_file_size);
|
|
#endif
|
|
if(memcmp(&buffer[i],blend_header_footer,sizeof(blend_header_footer))==0)
|
|
{
|
|
file_recovery->calculated_file_size+=0x14;
|
|
return 2;
|
|
}
|
|
file_recovery->calculated_file_size+=0x14+len;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int data_check_blend8le(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
|
|
{
|
|
while(file_recovery->calculated_file_size + 0x18 < file_recovery->file_size + buffer_size/2)
|
|
{
|
|
unsigned int len;
|
|
unsigned int i=file_recovery->calculated_file_size - file_recovery->file_size + buffer_size/2;
|
|
len=buffer[i+4]+ ((buffer[i+5])<<8)+ ((buffer[i+6])<<16)+ ((buffer[i+7])<<24);
|
|
#ifdef DEBUG_BLEND
|
|
log_debug("file_mov.c: atom %c%c%c%c (0x%02x%02x%02x%02x) size %u, calculated_file_size %llu\n",
|
|
buffer[i+0],buffer[i+1],buffer[i+2],buffer[i+3],
|
|
buffer[i+0],buffer[i+1],buffer[i+2],buffer[i+3],
|
|
len,
|
|
(long long unsigned)file_recovery->calculated_file_size);
|
|
#endif
|
|
if(memcmp(&buffer[i],blend_header_footer,sizeof(blend_header_footer))==0)
|
|
{
|
|
file_recovery->calculated_file_size+=0x18;
|
|
return 2;
|
|
}
|
|
file_recovery->calculated_file_size+=0x18+len;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int data_check_blend4be(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
|
|
{
|
|
while(file_recovery->calculated_file_size + 0x14 < file_recovery->file_size + buffer_size/2)
|
|
{
|
|
unsigned int len;
|
|
unsigned int i=file_recovery->calculated_file_size - file_recovery->file_size + buffer_size/2;
|
|
len=(buffer[i+4]<<24)+ ((buffer[i+5])<<16)+ ((buffer[i+6])<<8)+ buffer[i+7];
|
|
#ifdef DEBUG_BLEND
|
|
log_debug("file_mov.c: atom %c%c%c%c (0x%02x%02x%02x%02x) size %u, calculated_file_size %llu\n",
|
|
buffer[i+0],buffer[i+1],buffer[i+2],buffer[i+3],
|
|
buffer[i+0],buffer[i+1],buffer[i+2],buffer[i+3],
|
|
len,
|
|
(long long unsigned)file_recovery->calculated_file_size);
|
|
#endif
|
|
if(memcmp(&buffer[i],blend_header_footer,sizeof(blend_header_footer))==0)
|
|
{
|
|
file_recovery->calculated_file_size+=0x14;
|
|
return 2;
|
|
}
|
|
file_recovery->calculated_file_size+=0x14+len;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int data_check_blend8be(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
|
|
{
|
|
while(file_recovery->calculated_file_size + 0x18 < file_recovery->file_size + buffer_size/2)
|
|
{
|
|
unsigned int len;
|
|
unsigned int i=file_recovery->calculated_file_size - file_recovery->file_size + buffer_size/2;
|
|
len=(buffer[i+4]<<24)+ ((buffer[i+5])<<16)+ ((buffer[i+6])<<8)+ buffer[i+7];
|
|
#ifdef DEBUG_BLEND
|
|
log_debug("file_mov.c: atom %c%c%c%c (0x%02x%02x%02x%02x) size %u, calculated_file_size %llu\n",
|
|
buffer[i+0],buffer[i+1],buffer[i+2],buffer[i+3],
|
|
buffer[i+0],buffer[i+1],buffer[i+2],buffer[i+3],
|
|
len,
|
|
(long long unsigned)file_recovery->calculated_file_size);
|
|
#endif
|
|
if(memcmp(&buffer[i],blend_header_footer,sizeof(blend_header_footer))==0)
|
|
{
|
|
file_recovery->calculated_file_size+=0x18;
|
|
return 2;
|
|
}
|
|
file_recovery->calculated_file_size+=0x18+len;
|
|
}
|
|
return 1;
|
|
}
|