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                                   2024-11-14                           CRYPTSETUP-TCRYPTDUMP(8)