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/*
File: file_qbb.c
Copyright (C) 2007 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.
*/
#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_qbb)
#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 "common.h"
#ifdef DEBUG_QBB
#include "log.h"
#endif
/*@ requires valid_register_header_check(file_stat); */
static void register_header_check_qbb(file_stat_t *file_stat);
const file_hint_t file_hint_qbb= {
.extension="qbb",
.description="Quickbooks (qbb/qbw)",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=®ister_header_check_qbb
};
struct qbb_header
{
uint16_t magic;
uint16_t type;
uint16_t data_len;
uint16_t unk1;
#if 0
unsigned char data[0];
#endif
} __attribute__ ((gcc_struct, __packed__));
struct qbb_header02
{
uint16_t magic;
uint16_t type; /* 2 */
uint16_t data_len;
uint16_t unk1;
uint8_t unk2[6];
uint32_t size;
uint8_t unk3[10];
uint16_t title_len;
#if 0
uint8_t title[0];
#endif
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires file_recovery->file_rename==&file_rename_qbb;
@ requires valid_file_rename_param(file_recovery);
@ ensures valid_file_rename_result(file_recovery);
@*/
static void file_rename_qbb(file_recovery_t *file_recovery)
{
FILE *file;
unsigned int i=0;
char buffer[4096];
/*@ assert \valid((char *)&buffer + (0 .. sizeof(buffer)-1)); */
size_t lu;
if((file=fopen(file_recovery->filename, "rb"))==NULL)
return;
lu=fread(&buffer, 1, sizeof(buffer), file);
fclose(file);
if(lu <= 0)
return;
/*@ assert 0 < lu <= sizeof(buffer); */
#if defined(__FRAMAC__)
Frama_C_make_unknown(buffer, sizeof(buffer));
#endif
/*@ assert \valid_read((char *)&buffer + (0 .. lu-1)); */
/*@
@ loop assigns i;
@ loop variant lu - (i+sizeof(struct qbb_header02));
@*/
while(i+sizeof(struct qbb_header02) <= lu)
{
/*@ assert i+sizeof(struct qbb_header02) <= lu; */
/*@ assert i+sizeof(struct qbb_header) <= lu; */
const struct qbb_header *hdr=(const struct qbb_header*)&buffer[i];
const unsigned int data_len=le16(hdr->data_len);
if(le16(hdr->magic)!=0x8645)
return ;
if(le16(hdr->type)==2)
{
if(i+sizeof(struct qbb_header)+data_len < lu)
{
const struct qbb_header02 *hdr2=(const struct qbb_header02 *)&buffer[i];
/*@ assert \valid_read(hdr2); */
const unsigned int title_len=le16(hdr2->title_len);
if(sizeof(struct qbb_header02)+title_len <= sizeof(struct qbb_header)+data_len)
{
const char *title=&buffer[i+sizeof(struct qbb_header02)];
file_rename(file_recovery, title, title_len, 0, NULL, 1);
}
}
return ;
}
i+=sizeof(struct qbb_header)+data_len;
}
}
/*@
@ requires buffer_size >= 0x10;
@ requires separation: \separated(&file_hint_qbb, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_qbb(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)
{
const struct qbb_header *hdr0=(const struct qbb_header*)buffer;
uint64_t data_size=0;
unsigned int i=0;
if(buffer[0x0e]!=0x45 || buffer[0x0f]!=0x86)
return 0;
/*@
@ loop assigns i, data_size;
@ loop variant buffer_size - (i+sizeof(struct qbb_header02));
@*/
while(i+sizeof(struct qbb_header02) < buffer_size)
{
const struct qbb_header *hdr=(const struct qbb_header*)&buffer[i];
const unsigned int data_len=le16(hdr->data_len);
if(le16(hdr->magic)!=0x8645)
break;
if(le16(hdr->type)==2)
{
const struct qbb_header02 *hdr2=(const struct qbb_header02 *)hdr;
data_size=le32(hdr2->size);
}
#ifdef DEBUG_QBB
log_info("i=0x%x size=0x%lx len=0x%x\n", i, sizeof(struct qbb_header), data_len);
#endif
i+=sizeof(struct qbb_header)+data_len;
}
#ifdef DEBUG_QBB
log_info("i=0x%x data_size=0x%lx\n", i, (long unsigned)data_size);
#endif
if(data_size==0)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->calculated_file_size=data_size+i;
if(le16(hdr0->unk1)==1)
file_recovery_new->extension="qbmb";
else
file_recovery_new->extension=file_hint_qbb.extension;
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
file_recovery_new->file_rename=&file_rename_qbb;
return 1;
}
/*@
@ requires buffer_size >= 0x64;
@ requires separation: \separated(&file_hint_qbb, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ terminates \true;
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_qbw(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(buffer[0x60]=='M' && buffer[0x61]=='A' && buffer[0x62]=='U' && buffer[0x63]=='I')
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension="qbw";
file_recovery_new->calculated_file_size=(((uint64_t)buffer[0x34] + (((uint64_t)buffer[0x34+1])<<8)+
(((uint64_t)buffer[0x34+2])<<16) + (((uint64_t)buffer[0x34+3])<<24))+1)*1024;
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
return 1;
}
return 0;
}
/*@
@ requires buffer_size >= 0x87A + 6;
@ requires separation: \separated(&file_hint_qbb, buffer+(..), file_recovery, file_recovery_new);
@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures valid_header_check_result(\result, file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_qbw2(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[0x87A], "Sybase", 6)==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension="qbw";
return 1;
}
return 0;
}
static void register_header_check_qbb(file_stat_t *file_stat)
{
static const unsigned char qbb_header[8]= {0x45, 0x86, 0x00, 0x00, 0x06, 0x00, 0x02, 0x00};
static const unsigned char qbmb_header[8]= {0x45, 0x86, 0x00, 0x00, 0x06, 0x00, 0x01, 0x00};
static const unsigned char qbw2_header[4]= {0x5e, 0xba, 0x7a, 0xda};
static const unsigned char qbw_header[4]= {0x56, 0x00, 0x00, 0x00};
register_header_check(0, qbb_header,sizeof(qbb_header), &header_check_qbb, file_stat);
register_header_check(0, qbmb_header,sizeof(qbmb_header), &header_check_qbb, file_stat);
register_header_check(4, qbw_header,sizeof(qbw_header), &header_check_qbw, file_stat);
register_header_check(0x14, qbw2_header,sizeof(qbw2_header), &header_check_qbw2, file_stat);
}
#endif
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