cryptsetup syntax

pinguin74 <[email protected]>
Newsgroups gmane.linux.suse.security
Message-ID <[email protected]>
Apropos cryptsetup,

I have a question regarding the command syntax.

On the web, sometimes I see

cryptsetup --cipher aes-xts-plain64

and sometimes I see

cryptsetup --cipher aes-xts-plain64:sha256.

Is adding :sha256 an equivalent to adding -h sha256 or is this somethin
different? Is adding -h sha256 sufficient to chose the hash algo? What
is the purpose off adding :sha256 at the end of the cipher algo?

Once I even tried cryptsetup --cipher aes-xts-plain64:blubber -h sha256
and adding :blubber did not give an error message, it worked, this makes
me wonder, if adding :foo does make any sense at all...

Thanx
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