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/*
File: texFAT.c
Copyright (C) 2011 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
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include <ctype.h>
#include "types.h"
#include "common.h"
#include "lang.h"
#include "intrf.h"
#include "intrfn.h"
#include "exfat.h"
#include "log.h"
#include "log_part.h"
#include "texfat.h"
#ifdef HAVE_NCURSES
static void exFAT_dump_ncurses(disk_t *disk, const partition_t *partition, const unsigned char *buffer_bs, const unsigned char *buffer_backup_bs)
{
WINDOW *window=newwin(LINES, COLS, 0, 0); /* full screen */
keypad(window, TRUE); /* Need it to get arrow key */
aff_copy(window);
wmove(window,4,0);
wprintw(window,"%s",disk->description(disk));
wmove(window,5,0);
aff_part(window,AFF_PART_ORDER|AFF_PART_STATUS,disk,partition);
mvwaddstr(window,6,0, "Boot sector Backup boot record");
dump2(window, buffer_bs, buffer_backup_bs, 12 * disk->sector_size);
delwin(window);
(void) clearok(stdscr, TRUE);
#ifdef HAVE_TOUCHWIN
touchwin(stdscr);
#endif
}
#endif
static void exFAT_dump(disk_t *disk, const partition_t *partition, const unsigned char *buffer_bs, const unsigned char *buffer_backup_bs, char **current_cmd)
{
log_info("Superblock Backup superblock\n");
dump2_log(buffer_bs, buffer_backup_bs, 12 * disk->sector_size);
if(*current_cmd==NULL)
{
#ifdef HAVE_NCURSES
exFAT_dump_ncurses(disk, partition, buffer_bs, buffer_backup_bs);
#endif
}
}
static int exFAT_boot_sector_command(char **current_cmd, const char *options)
{
skip_comma_in_command(current_cmd);
if(check_command(current_cmd,"dump",4)==0)
{
return 'D';
}
else if(check_command(current_cmd,"originalexFAT",13)==0)
{
if(strchr(options,'O')!=NULL)
return 'O';
}
else if(check_command(current_cmd,"backupexFAT",11)==0)
{
if(strchr(options,'B')!=NULL)
return 'B';
}
return 0;
}
static const char *exFAT_boot_sector_rescan(disk_t *disk, const partition_t *partition, unsigned char *buffer_bs, unsigned char *buffer_backup_bs)
{
const int size_bs=12 * disk->sector_size;
int opt_B=0;
int opt_O=0;
#ifdef HAVE_NCURSES
aff_copy(stdscr);
wmove(stdscr,4,0);
wprintw(stdscr,"%s",disk->description(disk));
mvwaddstr(stdscr,5,0,msg_PART_HEADER_LONG);
wmove(stdscr,6,0);
aff_part(stdscr,AFF_PART_ORDER|AFF_PART_STATUS,disk,partition);
#endif
log_info("\nexFAT_boot_sector\n");
log_partition(disk,partition);
screen_buffer_add("Boot sector\n");
if(disk->pread(disk, buffer_bs, size_bs, partition->part_offset) != size_bs)
{
screen_buffer_add("Bad: can't read exFAT boot record.\n");
memset(buffer_bs,0,size_bs);
}
else if(test_exFAT((const struct exfat_super_block*)buffer_bs)==0)
{
screen_buffer_add("exFAT OK\n");
opt_O=1;
}
else
screen_buffer_add("Bad\n");
screen_buffer_add("\nBackup boot record\n");
if(disk->pread(disk, buffer_backup_bs, size_bs, partition->part_offset + size_bs) != size_bs)
{
screen_buffer_add("Bad: can't read exFAT backup boot record.\n");
memset(buffer_backup_bs,0,size_bs);
}
else if(test_exFAT((const struct exfat_super_block*)buffer_backup_bs)==0)
{
screen_buffer_add("exFAT OK\n");
opt_B=1;
}
else
screen_buffer_add("Bad\n");
screen_buffer_add("\n");
if(memcmp(buffer_bs, buffer_backup_bs, size_bs)==0)
{
screen_buffer_add("Sectors are identical.\n");
return "D";
}
else
{
screen_buffer_add("Sectors are not identical.\n");
}
if(opt_B!=0 && opt_O!=0)
return "DOB";
else if(opt_B!=0)
return "DB";
else if(opt_O!=0)
return "DO";
return "D";
}
int exFAT_boot_sector(disk_t *disk, partition_t *partition, char **current_cmd)
{
unsigned char *buffer_bs;
unsigned char *buffer_backup_bs;
int rescan=1;
const int size_bs=12 * disk->sector_size;
const char *options;
#ifdef HAVE_NCURSES
const struct MenuItem menu_exFAT[]=
{
{ 'P', "Previous",""},
{ 'N', "Next","" },
{ 'Q', "Quit","Return to Advanced menu"},
{ 'O', "Org. BS","Copy superblock over backup sector"},
{ 'B', "Backup BS","Copy backup superblock over superblock"},
{ 'D', "Dump","Dump superblock and backup superblock"},
{ 0, NULL, NULL }
};
#endif
buffer_bs=(unsigned char*)MALLOC(size_bs);
buffer_backup_bs=(unsigned char*)MALLOC(size_bs);
while(1)
{
int command;
screen_buffer_reset();
if(rescan==1)
{
options=exFAT_boot_sector_rescan(disk, partition, buffer_bs, buffer_backup_bs);
rescan=0;
}
screen_buffer_to_log();
if(*current_cmd!=NULL)
{
command=exFAT_boot_sector_command(current_cmd, options);
}
else
{
#ifdef HAVE_NCURSES
unsigned int menu=0;
#endif
log_flush();
#ifdef HAVE_NCURSES
command=screen_buffer_display_ext(stdscr, options, menu_exFAT, &menu);
#else
command=0;
#endif
}
switch(command)
{
case 0:
free(buffer_bs);
free(buffer_backup_bs);
return 0;
case 'O': /* O : copy original superblock over backup boot */
#ifdef HAVE_NCURSES
if(ask_confirmation("Copy original exFAT boot record over backup, confirm ? (Y/N)")!=0)
#endif
{
log_info("copy original superblock over backup boot\n");
if(disk->pwrite(disk, buffer_bs, size_bs, partition->part_offset + size_bs) != size_bs)
{
display_message("Write error: Can't overwrite exFAT backup boot record\n");
}
disk->sync(disk);
rescan=1;
}
break;
case 'B': /* B : copy backup superblock over main superblock */
#ifdef HAVE_NCURSES
if(ask_confirmation("Copy backup exFAT boot record over main boot record, confirm ? (Y/N)")!=0)
#endif
{
log_info("copy backup superblock over main superblock\n");
/* Reset information about backup boot record */
partition->sb_offset=0;
if(disk->pwrite(disk, buffer_backup_bs, size_bs, partition->part_offset) != size_bs)
{
display_message("Write error: Can't overwrite exFAT main boot record\n");
}
disk->sync(disk);
rescan=1;
}
break;
case 'D':
exFAT_dump(disk, partition, buffer_bs, buffer_backup_bs, current_cmd);
break;
}
}
}
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