x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
CRYPTSETUP-TCRYPTDUMP(8) Maintenance Commands CRYPTSETUP-TCRYPTDUMP(8)
NAME
cryptsetup-tcryptDump - dump the header information of a TCRYPT
(TrueCrypt or VeraCrypt compatible) device
SYNOPSIS
cryptsetup tcryptDump [<options>] <device>
DESCRIPTION
Dump the header information of a TCRYPT (TrueCrypt or VeraCrypt
compatible) device.
If the --dump-volume-key option is used, the TCRYPT device volume key
is dumped instead of TCRYPT header info. Beware that the volume key (or
concatenated volume keys if cipher chain is used) can be used to
decrypt the data stored in the TCRYPT container without a passphrase.
This means that if the volume key is compromised, the whole device has
to be erased to prevent further access. Use this option carefully.
<options> can be [--dump-volume-key, --key-file, --tcrypt-hidden,
--tcrypt-system, --tcrypt-backup, --veracrypt (ignored),
--disable-veracrypt, --veracrypt-pim, --veracrypt-query-pim, --cipher,
--hash, --header, --verify-passphrase, --timeout].
The keyfile parameter allows a combination of file content with the
passphrase and can be repeated.
OPTIONS
--hash, -h <hash-spec>
Specifies the passphrase hash. Applies to plain and loopaes device
types only.
For tcrypt device type, it restricts checked PBKDF2 variants when
looking for header.
--cipher, -c <cipher-spec>
Set the cipher specification string for plain device type.
For tcrypt device type it restricts checked cipher chains when
looking for header.
--verify-passphrase, -y
When interactively asking for a passphrase, ask for it twice and
complain if both inputs do not match. Ignored on input from file or
stdin.
--key-file, -d name
Read the passphrase from file.
If the name given is "-", then the passphrase will be read from
stdin. In this case, reading will not stop at newline characters.
See section NOTES ON PASSPHRASE PROCESSING in cryptsetup(8) for
more information.
--dump-volume-key, --dump-master-key (OBSOLETE alias)
Print the volume key in the displayed information. Use with care,
as the volume key can be used to bypass the passphrases, see also
option --volume-key-file.
--timeout, -t <number of seconds>
The number of seconds to wait before timeout on passphrase input
via terminal. It is relevant every time a passphrase is asked. It
has no effect if used in conjunction with --key-file.
This option is useful when the system should not stall if the user
does not input a passphrase, e.g. during boot. The default is a
value of 0 seconds, which means to wait forever.
--header <device or file storing the LUKS header>
Use a detached (separated) metadata device or file where the LUKS
header is stored. This option allows one to store ciphertext and
LUKS header on different devices.
For commands that change the LUKS header (e.g. luksAddKey), specify
the device or file with the LUKS header directly as the LUKS
device.
--tcrypt-hidden, --tcrypt-system, --tcrypt-backup
Specify which TrueCrypt on-disk header will be used to open the
device. See TCRYPT section in cryptsetup(8) for more info.
--veracrypt
This option is ignored as VeraCrypt compatible mode is supported by
default.
--disable-veracrypt
This option can be used to disable VeraCrypt compatible mode (only
TrueCrypt devices are recognized). Only for TCRYPT extension. See
TCRYPT section in cryptsetup(8) for more info.
--veracrypt-pim, --veracrypt-query-pim
Use a custom Personal Iteration Multiplier (PIM) for VeraCrypt
device. See TCRYPT section in cryptsetup(8) for more info.
--batch-mode, -q
Suppresses all confirmation questions. Use with care!
If the --verify-passphrase option is not specified, this option
also switches off the passphrase verification.
--debug or --debug-json
Run in debug mode with full diagnostic logs. Debug output lines are
always prefixed by #.
If --debug-json is used, additional LUKS2 JSON data structures are
printed.
--version, -V
Show the program version.
--usage
Show short option help.
--help, -?
Show help text and default parameters.
REPORTING BUGS
Report bugs at cryptsetup mailing list <cryptsetup@lists.linux.dev> or
in Issues project section
<https://gitlab.com/cryptsetup/cryptsetup/-/issues/new>.
Please attach output of the failed command with --debug option added.
SEE ALSO
Cryptsetup FAQ
<https://gitlab.com/cryptsetup/cryptsetup/wikis/FrequentlyAskedQuestions>
cryptsetup(8), integritysetup(8) and veritysetup(8)
CRYPTSETUP
Part of cryptsetup project <https://gitlab.com/cryptsetup/cryptsetup/>.
cryptsetup 2.7.0 2024-08-30 CRYPTSETUP-TCRYPTDUMP(8)
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