Re: authenticated file systems using HMAC(SHA256)

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On 16.04.20 г. 17:24 ч., David Sterba wrote:
> naming of the new checksums (hmac-sha256 or hmac-blake2 should be ok)> - key specification via mount option

But the key shouldn't really be visible in /proc/mounts since it's
readable by ordinary users, god knows how many more pseudo files there
are which can provide the same situation. If the specification of the
key is a reference to a loaded key then yes but otherwise I think that's
a security risk, unless it's possible to hide passed options from
/proc/mounts i.e pass it but make it internal to the filesystem ?


> - all progs must work with filesystems with the keyed hash, so how to
>   specify the auth key in a consistent way



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