VirtualPS/2
  "   ˆl–ßi~”ÜZÔÒ€vã.\ÊbÑ¿¿ƒyÀƒÁÃ !¢    Cryptsetup 1.5.0 Release Notes
==============================

This release covers mainly inclusion of:

  * Veritysetup tool (and related libcryptsetup extensions for dm-verity).

  * Experimental cryptsetup-reencrypt tool (LUKS offline reencryption).

Changes since version 1.5.0-rc2
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

  * Add --device-size option for reencryption tool.

  * Switch to use unit suffix for --reduce-device-size option.

  * Remove open device debugging feature (no longer needed).

  * Fix library name for FIPS check.

  * Add example of using reencryption inside dracut (see misc/dracut).

Changes since version 1.5.0-rc1
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Introduce cryptsetup-reencrypt - experimental offline LUKS reencryption tool.

! cryptsetup-reencrypt tool is EXPERIMENTAL
! ALWAYS BE SURE YOU HAVE RELIABLE BACKUP BEFORE USING THIS TOOL

This tool tries to simplify situation when you need to re-encrypt the whole
LUKS device in situ (without need to move data elsewhere).

This can happen for example when you want to change volume (master) key,
encryption algorithm, or other encryption parameter.

Cryptsetup-reencrypt can even optionally shift data on device
(reducing data device size - you need some free space at the end of device).

In general, cryptsetup-reencrypt can be used to

 - re-generate volume key
 - change arbitrary encryption parameters
 - add encryption to not yet encrypted drive

Side effect of reencryption is that final device will contain
only ciphertext (for all sectors) so even if device was not properly
wiped by random data, after reencryption you cannot distinguish
which sectors are used.
(Reencryption is done always for the whole device.)

There are for sure bugs, please TEST IT IN TEST ENVIRONMENT before
use for your data.

This tool is not resistant to HW and kernel failures - hw crash
will cause serious data corruption.

You can enable compilation of this tool with --enable-cryptsetup-reencrypt
configure option (it is switched off by default).
(Tool requires libcryptsetup 1.4.3 and later.)

You have to provide all keyslot passphrases or use --keyslot-option
(then all other keyslots will be disabled).

EXAMPLES (from man page)

Reencrypt /dev/sdb1 (change volume key)
   # cryptsetup-reencrypt /dev/sdb1

Reencrypt and also change cipher and cipher mode
  # cryptsetup-reencrypt /dev/sdb1 -c aes-xts-plain64

  Note: if you are changing key size, there must be enough space
  for keyslots in header or you have to use --reduce-device size and
  reduce fs in advance.

Add LUKS encryption to not yet encrypted device
  First, be sure you have space added to disk.
  Or, alternatively, shrink filesystem in advance.

  Here we need 4096 512-bytes sectors (enough for 2x128 bit key).

  # fdisk -u /dev/sdb # move sdb1 partition end + 4096 sectors

  # cryptsetup-reencrypt /dev/sdb1 --new --reduce-device-size 4096

There are some options which can improve performance (depends on system),
namely --use-directio (use direct IO for all operations) can be faster
on some systems. See man page.

Progress and estimated time is printed during reencryption.

You can suspend reencryption (using ctrl+c or term signal).
To continue reencryption you have to provide only
the device parameter (offset is stored in temporary log file).

Please note LUKS device is marked invalid during reencryption and
you have to retain tool temporary files until reencryption finishes.

Temporary files are LUKS-<uuid>.[log|org|new]

Other changes
~~~~~~~~~~~~~

  * Fix luks-header-from-active script (do not use LUKS header on-disk, add UUID).

  * Add --test-passphrase option for luksOpen (check passphrase only).

  * Fix parsing of hexadecimal string (salt or root hash) in veritysetup.

Changes since version 1.4.3
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Introduce veritysetup tool for dm-verity target management.

The dm-verity device-mapper target was added to Linux kernel 3.4 and
provides transparent integrity checking of block devices using a cryptographic
digest provided by the kern