x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
CRYPTSETUP-BITLKDUMP(8) Maintenance Commands CRYPTSETUP-BITLKDUMP(8)
NAME
cryptsetup-bitlkDump - dump the header information of a BITLK
(BitLocker compatible) device
SYNOPSIS
cryptsetup bitlkDump [<options>] <device>
DESCRIPTION
Dump the header information of a BITLK (BitLocker compatible) device.
If the --dump-volume-key option is used, the BITLK device volume key is
dumped instead of header information. You have to provide password or
keyfile to dump volume key.
Beware that the volume key can be used to decrypt the data stored in
the 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, --volume-key-file, --key-file,
--keyfile-offset, --keyfile-size, --timeout].
OPTIONS
--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.
--keyfile-offset value
Skip value bytes at the beginning of the key file.
--keyfile-size, -l value
Read a maximum of value bytes from the key file. The default is to
read the whole file up to the compiled-in maximum that can be
queried with --help. Supplying more data than the compiled-in
maximum aborts the operation.
This option is useful to cut trailing newlines, for example. If
--keyfile-offset is also given, the size count starts after the
offset.
--volume-key-file, --master-key-file (OBSOLETE alias)
Use a volume key stored in a file. The volume key is stored in a
file instead of being printed out to standard output.
--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.
--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-BITLKDUMP(8)
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