CRYPTSETUP-FVAULT2DUMP(8) | Maintenance Commands | CRYPTSETUP-FVAULT2DUMP(8) |
NAME
cryptsetup-fvault2Dump - dump the header information of a FVAULT2 (FileVault2 compatible) device
SYNOPSIS
cryptsetup fvault2Dump [<options>] <device>
DESCRIPTION
Dump the header information of a FVAULT2 (FileVault2 compatible) device.
If the --dump-volume-key option is used, the FVAULT2 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
--batch-mode, -q
If the --verify-passphrase option is not specified, this option also switches off the passphrase verification.
--debug or --debug-json
If --debug-json is used, additional LUKS2 JSON data structures are printed.
--dump-volume-key, --dump-master-key (OBSOLETE alias)
--help, -?
--key-file, -d name
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
--keyfile-size, -l value
This option is useful to cut trailing newlines, for example. If --keyfile-offset is also given, the size count starts after the offset.
--timeout, -t <number of seconds>
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.
--usage
--version, -V
--volume-key-file, --master-key-file (OBSOLETE alias)
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
Part of cryptsetup project https://gitlab.com/cryptsetup/cryptsetup/.
2023-10-28 | cryptsetup 2.7.5 |