UPSTREAM: dm verity: clean up duplicate hashing code

Handle dm-verity salting in one place to simplify the code.

Bug: 27175947

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Badhri Jagan Sridharan <badhri@google.com>
Change-Id: Iea337445fe4f8380cf1af0e491c7935b6db2092a
1 file changed