ZFS-FIDO2-LOAD-KEY(8) System Manager's Manual ZFS-FIDO2-LOAD-KEY(8)

zfs-fido2-load-key — load FIDO2-encrypted ZFS dataset key

zfs-fido2-load-key [-n] dataset

After verifying dataset was encrypted with the tzpfms backend, asserts the preserved challenge, HMACking the salt with the on-device secret, and loads the resulting key into dataset.

See zfs-fido2-change-key(8) for a detailed description.

Do a no-op/dry run, can be used even if the key is already loaded. Equivalent to zfs load-key's -n option.

By default, passphrases are prompted for and read in on the standard output and input streams. If TZPFMS_PASSPHRASE_HELPER is set and nonempty, it will be run via /bin/sh -c to provide each passphrase, instead.

The standard output stream of the helper is tied to an anonymous file and used in its entirety as the passphrase, except for a trailing new-line, if any. The arguments are:

Pre-formatted noun phrase with all the information below, for use as a prompt
Either the dataset name or the device feature being prompted for
"new" if this is for a new passphrase, otherwise blank
"again" if it's the second prompt for that passphrase, otherwise blank

If the helper doesn't exist (the shell exits with ), a diagnostic is issued and the normal prompt is used as fall-back. If it fails for any other reason, the prompting is aborted.

If set, enables libfido2 debug logging to the standard error stream.

When creating, the first device which supports the ‘hmac-secret’ extension is used. When loading, the assertion yielding the key is shopped around to every such device.

The libfido2 documentation at https://developers.yubico.com/libfido2/.

To all who support further development, in particular:

https://todo.sr.ht/~nabijaczleweli/fzifdso

~nabijaczleweli/tzpfms@lists.sr.ht, archived at https://lists.sr.ht/~nabijaczleweli/tzpfms.

March 11, 2024 fzifdso 0.4.1