Re: veritysetup format without --salt

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On 12/12/2019 09:02, gilmore@xxxxxxxxxxxxxx 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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