Attachment 2388 Details for Bug 5983 – Demonstration of creating two partitions within one encrypted container.

Demonstration of creating two partitions within one encrypted container.

demo.txt (text/plain), 2.14 KB, created by Dave Hodgins on 2012-05-28 11:31:02 CEST

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Creator: Dave Hodgins

Created: 2012-05-28 11:31:02 CEST

Size: 2.14 KB

patch

obsolete

>fdisk -l /dev/sdd
>
>Disk /dev/sdd: 259 MB, 259522560 bytes
>8 heads, 62 sectors/track, 1021 cylinders, total 506880 sectors
>Units = sectors of 1 * 512 = 512 bytes
>Sector size (logical/physical): 512 bytes / 512 bytes
>I/O size (minimum/optimal): 512 bytes / 512 bytes
>Disk identifier: 0x00000000
>
>   Device Boot      Start         End      Blocks   Id  System
>/dev/sdd1              62      506415      253177   83  Linux
>
>I then enter the following command, which erases everything in /dev/sdd1
>
>/sbin/cryptsetup --cipher aes-xts-benbi --key-size 512 luksFormat /dev/sdd1
>YES
>passphrase
>passphrase
>
>Then I open the encrypted container using ...
>/sbin/cryptsetup luksOpen /dev/sdd1 crypt_sdd1
>
>After the encrypted container has been opened, I create a partition table
>and two partitions within the encyrpted block device
>cfdisk -z /dev/mapper/crypt_sdd1
>create a vfat partition
>create a ntfs partition
>write the partition table
>quit
>
>fdisk -l /dev/mapper/crypt_sdd1
>
>Disk /dev/mapper/crypt_sdd1: 257 MB, 257156096 bytes
>255 heads, 63 sectors/track, 31 cylinders, total 502258 sectors
>Units = sectors of 1 * 512 = 512 bytes
>Sector size (logical/physical): 512 bytes / 512 bytes
>I/O size (minimum/optimal): 512 bytes / 512 bytes
>Disk identifier: 0x00dc6e53
>
>                  Device Boot      Start         End      Blocks   Id  System
>/dev/mapper/crypt_sdd1p1              63      257039      128488+   c  W95 FAT32 (LBA)
>/dev/mapper/crypt_sdd1p2          257040      498014      120487+   7  HPFS/NTFS
>
>As you can see above, the two partitions exist.  Once formatted, they can
>be mounted individually.
>
>fdisk -l /dev/sdd
>
>Disk /dev/sdd: 259 MB, 259522560 bytes
>8 heads, 62 sectors/track, 1021 cylinders, total 506880 sectors
>Units = sectors of 1 * 512 = 512 bytes
>Sector size (logical/physical): 512 bytes / 512 bytes
>I/O size (minimum/optimal): 512 bytes / 512 bytes
>Disk identifier: 0x00000000
>
>   Device Boot      Start         End      Blocks   Id  System
>/dev/sdd1              62      506415      253177   83  Linux
>
>As you can see above, the actual sdd1 is still a luks encrypted block device,
>that is not changed by the fact that two different types of file systems are
>contained within it.

fdisk -l /dev/sdd

Disk /dev/sdd: 259 MB, 259522560 bytes
8 heads, 62 sectors/track, 1021 cylinders, total 506880 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1              62      506415      253177   83  Linux

I then enter the following command, which erases everything in /dev/sdd1

/sbin/cryptsetup --cipher aes-xts-benbi --key-size 512 luksFormat /dev/sdd1
YES
passphrase
passphrase

Then I open the encrypted container using ...
/sbin/cryptsetup luksOpen /dev/sdd1 crypt_sdd1

After the encrypted container has been opened, I create a partition table
and two partitions within the encyrpted block device
cfdisk -z /dev/mapper/crypt_sdd1
create a vfat partition
create a ntfs partition
write the partition table
quit

fdisk -l /dev/mapper/crypt_sdd1

Disk /dev/mapper/crypt_sdd1: 257 MB, 257156096 bytes
255 heads, 63 sectors/track, 31 cylinders, total 502258 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00dc6e53

                  Device Boot      Start         End      Blocks   Id  System
/dev/mapper/crypt_sdd1p1              63      257039      128488+   c  W95 FAT32 (LBA)
/dev/mapper/crypt_sdd1p2          257040      498014      120487+   7  HPFS/NTFS

As you can see above, the two partitions exist.  Once formatted, they can
be mounted individually.

fdisk -l /dev/sdd

Disk /dev/sdd: 259 MB, 259522560 bytes
8 heads, 62 sectors/track, 1021 cylinders, total 506880 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1              62      506415      253177   83  Linux

As you can see above, the actual sdd1 is still a luks encrypted block device,
that is not changed by the fact that two different types of file systems are
contained within it.

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