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PhotoRec: recover recents version of Acronis .tib files

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This commit is contained in:
Christophe Grenier 2011-01-05 07:57:16 +01:00
parent 7715db0b60
commit 2bca2d6e53
1 changed files with 64 additions and 5 deletions
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69
src/file_tib.c
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@ -2,7 +2,7 @@
File: file_tib.c
Copyright (C) 2007 Christophe GRENIER <grenier@cgsecurity.org>
Copyright (C) 2007-2010 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
@ -23,12 +23,16 @@
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <stdio.h>
#include "types.h"
#include "filegen.h"
#include "common.h"
static void register_header_check_tib(file_stat_t *file_stat);
static int header_check_tib(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);
@ -45,16 +49,70 @@ const file_hint_t file_hint_tib= {
static const unsigned char tib_header[4]= { 0xb4, 0x6e, 0x68, 0x44};
static const unsigned char tib2_header[7]= { 0xce, 0x24, 0xb9, 0xa2, 0x20, 0x00, 0x00};
static const unsigned char tib2_footer[7]= {0x00, 0x00, 0x20, 0xa2, 0xb9, 0x24, 0xce};
static void register_header_check_tib(file_stat_t *file_stat)
{
register_header_check(0, tib_header,sizeof(tib_header), &header_check_tib, file_stat);
register_header_check(0, tib2_header,sizeof(tib2_header), &header_check_tib, file_stat);
}
static void file_check_tib2(file_recovery_t *file_recovery)
static int data_check_tib2(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
{
const unsigned char tib2_footer[7]= {0x00, 0x00, 0x20, 0xa2, 0xb9, 0x24, 0xce};
file_search_footer(file_recovery, tib2_footer, sizeof(tib2_footer), 1);
while(file_recovery->calculated_file_size + buffer_size/2 >= file_recovery->file_size &&
file_recovery->calculated_file_size + 512 <= file_recovery->file_size + buffer_size/2)
{
const unsigned int i=file_recovery->calculated_file_size - file_recovery->file_size + buffer_size/2;
file_recovery->calculated_file_size+=512;
if(memcmp(&buffer[i + 512 - sizeof(tib2_footer)], tib2_footer, sizeof(tib2_footer))==0)
return 2;
}
return 1;
}
static void file_check_tib(file_recovery_t *file_recovery)
{
unsigned char*buffer=(unsigned char*)MALLOC(512);
int64_t file_size=file_recovery->calculated_file_size-512;
file_recovery->file_size = file_recovery->calculated_file_size;
if(fseek(file_recovery->handle, file_size, SEEK_SET)<0)
{
free(buffer);
return;
}
if(fread(buffer, 1, 512, file_recovery->handle)<=0)
{
free(buffer);
return;
}
if(memcmp(&buffer[512 - sizeof(tib2_footer)], tib2_footer, sizeof(tib2_footer))==0)
{
free(buffer);
return;
}
for(; file_size>0; file_size-=512)
{
unsigned int i;
if(fseek(file_recovery->handle, file_size, SEEK_SET)<0)
{
free(buffer);
return;
}
if(fread(buffer, 1, 512, file_recovery->handle)<=0)
{
free(buffer);
return;
}
for(i=0; i<512 && buffer[i]==0; i++);
if(i!=512)
{
file_recovery->file_size=file_size + 512;
free(buffer);
return ;
}
}
free(buffer);
}
static int header_check_tib(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)
@ -68,7 +126,8 @@ static int header_check_tib(const unsigned char *buffer, const unsigned int buff
if(memcmp(buffer,tib2_header, sizeof(tib2_header))==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->file_check=file_check_tib2;
file_recovery_new->file_check=&file_check_tib;
file_recovery_new->data_check=data_check_tib2;
file_recovery_new->extension=file_hint_tib.extension;
return 1;
}