Any TrueCrypt (tcplay) or dm-crypt (cryptsetup) users?

[Michael Neumann]

On Fri, Dec 13, 2024 at 07:06:37AM +0000, Francis GUDIN wrote:
> 11 d??cembre 2024 15:57 "Michael Neumann" <mneumann at ntecs.de> a ??crit:
> 
> > Hi,
> > 
> > Anyone using one of the following with a DragonFly system?
> > 
> 
> Hello,
> 
> one of my machine (a laptop) was setup years ago with its storage encrypted.
> I'm having a hard time to remember how and with details re. cipher, etc.
> 
> All i manage to get to is:
> % sudo dmsetup -v info root
> Name:              root
> State:             ACTIVE
> Read Ahead:        0
> Tables present:    LIVE
> Open count:        0
> Event number:      0
> Major, minor:      255, 504430599
> Number of targets: 1
> UUID: CRYPT-LUKS1-root
> 
> % kldstat -v | grep -i dm
>                 11 dm
>                 12 dm_target_crypt
>                 13 dm_target_linear
>                 14 dm_target_striped
>                 15 dm_target_delay
>                 16 dm_target_flakey
>                 115 kbdmux
> %
> 
> Does it help ?
> 
> I can provide more details if you provide me with commands ;)

Let's say your encrypted disk is /dev/da0s1e. Try the following:

    $ cryptsetup isLuks /dev/da0s1e && echo yes
    yes

    $ cryptsetup luksDump /dev/da0s1e
    LUKS header information for /dev/da0s1e

    Version:       	1
    Cipher name:   	aes
    Cipher mode:   	cbc-essiv:sha256
    Hash spec:     	sha1
    Payload offset:	2056
    MK bits:       	256

The Cipher name and Cipher mode is interesting for me :).
It should be "aes" and "cbc-essiv:sha256" in almost all cases.

Best regards,

   Michael