790666ff (Add support for allow_discrads for dm-integrity., 2020-04-09)
added TRIM support for standalone dm-integrity volumes.
This change is now reflected in the cryptsetup(8) man page.
With LUKS2 crypt_keyslot_change_by_passphrase() call
does not have to overwrite binary keyslot
area in-place when user asked for specific keyslot id.
If there's enough free space in keyslot binary area
we can write new keyslot material in the the free area
(identified temporarily by new keyslot id) and switch
pointers (json metadata) to point to the new keyslot area after
the keyslot area write is complete. The old keyslot
area gets deleted after the new area write is finished.
Otherwise we needlesly risk to lose the existing keyslot
if the operation gets interupted.
With this patch LUKS2 crypt_keyslot_change_by_passphrase()
overwrites existing keyslot (including keyslot area)
only if there's no free space and therefore in-place update
is necessary.
Fixes: #839.
We can not link internal VK kernel key in custom user
keyring. There are two reasons for it:
The internal VK kernel key description can not be
acquired via API and it may change over time
(LUKS2 reencryption).
With recent SED OPAL support volume key becomes a 'blob'
containing up to two keys (dm-crypt key for SWE and key
for unlocking SED OPAL locking range). The internal
kernel key contains only dm-crypt (if required) but
custom user keyring needs to be provided with whole
volume key (blob).
Added user specified key description for the linked key
in custom user keyring. The linked key can be reached by
the specified description after successful activation (resume).
Add --volume-key-keyring option, which takes a name of a key in keyring,
which will be used as a VK during device activation. The key can be
specified in keyctl-compatible syntax "%<key_type>:<key_name>".
If a user explicitly specifies PBKDF parameters (like iterations,
used memory of threads), do not limit them, even if it can cause
resource exhaustion.
The only limits are hard limits per the PBKDF algorithm.
The force options were mostly used for decreasing parameters,
but it should work even opposite - despite the fact it can mean
shooting yourself in the foot (OOM).
Fixes: #812
In practice luksAddKey action does two operations. It unlocks existing
device volume key and stores unlocked volume key in a new keyslot.
Previously the options were limited to key files and passphrases.
With this patch user may combine freely following options:
To unlock keyslot with volume key user may:
- provide existing passphrase via interactive prompt (default method)
- use --key-file option to provide file with a valid passphrase to existing keyslot
- provide volume key directly via --volume-key-file
- unlock keyslot via all available LUKS2 tokens by --token-only
- unlock keyslot via specific token with --token-id
- unlock keyslot via specific token type by --token-type
To provide the passphrase for a new keyslot user may:
- provide existing passphrase via interactive prompt (default method)
- use --new-keyfile parameter or positional parameter to read the
passphrase from file.
- use --new-token-id to select specific LUKS2 token to get passphrase
for new keyslot. New keyslot is assigned to selected token id if
operation is succesfull.
Fixes: #725.
Fast xxhash64 algoritm can be used for integrity protection.
Add implicit tag size (so user do not need to use --tag-size),
mention it in man page and add a test.
Fixes: #632
