/*
* This is a special case code to check for an MDRAID device. We do
* this special since it requires checking for a superblock at the end
* of the device.
*/
static int check_mdraid(int fd, unsigned char *ret_uuid)
{
struct mdp_superblock_s *md;
blkid_loff_t offset;
char buf[4096];
if (fd < 0)
return -BLKID_ERR_PARAM;
offset = (blkid_get_dev_size(fd) & ~((blkid_loff_t)65535)) - 65536;
if (blkid_llseek(fd, offset, 0) < 0 ||
read(fd, buf, 4096) != 4096)
return -BLKID_ERR_IO;
/* Check for magic number */
if (memcmp("\251+N\374", buf, 4) && memcmp("\374N+\251", buf, 4))
return -BLKID_ERR_PARAM;
if (!ret_uuid)
return 0;
*ret_uuid = 0;
/* The MD UUID is not contiguous in the superblock, make it so */
md = (struct mdp_superblock_s *)buf;
if (md->set_uuid0 || md->set_uuid1 || md->set_uuid2 || md->set_uuid3) {
memcpy(ret_uuid, &md->set_uuid0, 4);
memcpy(ret_uuid + 4, &md->set_uuid1, 12);
}
return 0;
}
static void get_block_device_size(struct device_info *info, int fd)
{
blkid_loff_t blkid_size;
blkid_size = blkid_get_dev_size(fd);
if (blkid_size)
info->size = blkid_size;
}
/*
* sizeof_dev: Returns size of device in bytes
*/
static loff_t sizeof_dev(int fd)
{
loff_t numbytes;
#ifdef HAVE_BLKID_BLKID_H
numbytes = blkid_get_dev_size(fd);
if (numbytes <= 0) {
fprintf(stderr, "%s: blkid_get_dev_size(%s) failed",
progname, devname);
return 1;
}
goto out;
#else
# if defined BLKGETSIZE64 /* in sys/mount.h */
if (ioctl(fd, BLKGETSIZE64, &numbytes) >= 0)
goto out;
# endif
# if defined BLKGETSIZE /* in sys/mount.h */
{
unsigned long sectors;
if (ioctl(fd, BLKGETSIZE, §ors) >= 0) {
numbytes = (loff_t)sectors << 9;
goto out;
}
}
# endif
{
struct stat statbuf;
if (fstat(fd, &statbuf) == 0 && S_ISREG(statbuf.st_mode)) {
numbytes = statbuf.st_size;
goto out;
}
}
fprintf(stderr, "%s: unable to determine size of %s\n",
progname, devname);
return 0;
#endif
out:
if (verbose)
printf("%s: %s is %llu bytes (%g GB) in size\n",
progname, devname,
(unsigned long long)numbytes, (double)numbytes / ONE_GB);
return numbytes;
}
int main(int argc, char **argv)
{
blkid_loff_t bytes;
int fd;
if (argc < 2) {
fprintf(stderr, "Usage: %s device\n"
"Determine the size of a device\n", argv[0]);
return 1;
}
if ((fd = open(argv[1], O_RDONLY)) < 0)
perror(argv[0]);
bytes = blkid_get_dev_size(fd);
printf("Device %s has %Ld 1k blocks.\n", argv[1], bytes >> 10);
return 0;
}
/*
* Purpose of this function is to open a device and write random data to it as a way of hiding information on the disk.
*
* The above is accomplished by opening a plain mapper against the device and then write to the device through the mapper
*
*/
int zuluCryptEXEWriteDeviceWithJunk( const struct_opts * opts,const char * mapping_name,uid_t uid )
{
stringList_t stl = StringListInit() ;
string_t * mapper = StringListAssign( stl ) ;
string_t * confirm = StringListAssign( stl );
double size ;
double size_written ;
const char * device = opts->device ;
char buffer[ SIZE ] ;
int ratio ;
int prev_ratio ;
int k ;
struct sigaction sigac;
memset( &sigac,'\0',sizeof( struct sigaction ) ) ;
sigac.sa_handler = &sigTERMhandler ;
sigaction( SIGINT,&sigac,NULL ) ;
sigaction( SIGTERM,&sigac,NULL ) ;
sigaction( SIGHUP,&sigac,NULL ) ;
__exit_as_requested = 0 ;
if( ( k = open_plain_as_me_1( opts,mapping_name,uid,0 ) ) != 0 ){
return k ;
}
*mapper = zuluCryptCreateMapperName( device,mapping_name,uid,ZULUCRYPTshortMapperPath ) ;
StringMultiplePrepend( *mapper,"/",crypt_get_dir(),NULL ) ;
if( opts->ask_confirmation ){
printf( gettext( "\nWARNING, device \"%s\" will be overwritten with random data destroying all present data.\n" ),device ) ;
printf( gettext( "Are you sure you want to proceed? Type \"YES\" and press enter if you are sure: " ) ) ;
*confirm = StringGetFromTerminal_1( 3 ) ;
if( *confirm == StringVoid ){
return zuluExit( stl,17 ) ;
}else{
k = StringEqual( *confirm,gettext( "YES" ) ) ;
if( k == 0 ){
if( zuluCryptSecurityGainElevatedPrivileges() ){
zuluCryptCloseMapper( StringContent( *mapper ) ) ;
zuluCryptSecurityDropElevatedPrivileges() ;
}
return zuluExit( stl,5 ) ;
}
}
}
k = open( StringContent( *mapper ),O_WRONLY ) ;
size = ( double ) blkid_get_dev_size( k ) ;
memset( buffer,0,SIZE ) ;
size_written = 0 ;
prev_ratio = -1 ;
while( write( k,buffer,SIZE ) > 0 ){
if( __exit_as_requested == 1 ){
break ;
}
size_written += SIZE ;
ratio = ( int ) ( ( size_written / size ) * 100 ) ;
if( ratio > prev_ratio ){
printf( "\r%s %d%%",gettext( "percentage complete: " ),ratio ) ;
fflush( stdout );
prev_ratio = ratio ;
}
}
close( k ) ;
if( zuluCryptSecurityGainElevatedPrivileges() ){
zuluCryptCloseMapper( StringContent( *mapper ) ) ;
zuluCryptSecurityDropElevatedPrivileges() ;
}
if( __exit_as_requested == 1 ){
return zuluExit( stl,15 ) ;
}else{
return zuluExit( stl,3 ) ;
}
}
