If users want to use blake2b/blake2s, the kernel algorithm name
includes dash - like "blake2s-256".
Because we use dash as a separator, this patch adds an exception
for this case.
Fixes: #581.
TrueCrypt/VeraCrypt always use 512-bytes sector for encryption,
but for devices with a larger native sector it stores this value in header.
This patch allows activating of such devices, basically ignoring
the mentioned sector size in header (it only must be multiple
of 512-bytes sector).
Fixes: #580.
When creating LUKS2 header with specified --offset much larger
then LUKS2 header size we needlessly also wipe (allocate up to
--offset) much larger file than needed.
We've assumed that first 4 bytes of the decrypted key data is the
size of the key + metadata. Looks like this isn't true and only
first two bytes contain the size and the other two bytes are
unknown data, possibly related to reencryption and/or passphrase
change.
Fixes: #575
All POPT_ARG_STRING pointers must be free'd manually
in calling application. This is unfortunately not documented
well behaviour of popt and we were having memory leaks due to
it.
This is part of effort to eliminate all memory leaks related
to options parsing in popt but for that to work we must avoid
passing constant strings to free().
The EBOIV initialization vector is intended to be used
internally with BitLocker devices (for CBC mode).
It can be used in some specific cases for other devices.
This patch adds userspace implementation duplicating
the same EBOIV as the dm-crypt kernel.
Fixes: #562
The iv_large_sector option is supported in dm-crypt since introduction
of larger sectors encryption.
It counts Initialization Vector (IV) in larger sector size (if set) instead
of 512 bytes sectors.
This option does not have any performance or security impact, but it can be
used for accessing incompatible existing disk images from other systems.
(It is used internally in BitLocker compatibily code).
This patch allows it to be used for plain type device, so users
can manually map foreign disk images.
Only open action with plain device and sector size > 512 bytes is supported.
