Re: veritysetup format without --salt

Milan Broz <[email protected]>
Newsgroups gmane.linux.kernel.device-mapper.dm-crypt
Message-ID <[email protected]>
On 12/12/2019 09:02, [email protected] wrote:
> Hi, If 'veritysetup format <data_device> <hash_device>' is called
> without '--salt', will there a salt (from a random number generator)
> be used to calculate the digest? If yes, can you please point me to
> the spot in the veritysetup source code where the salt is generated
> or imported?

Userspace tools (like veritysetup) have no direct access to a RNG,
it is inside libcryptsetup library API.
Search for _crypt_format_verity() function...

In today version of devel git here
https://gitlab.com/cryptsetup/cryptsetup/blob/master/lib/setup.c#L2046

Milan
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