On Thu, Jan 14, 2021 at 04:19:05PM +0100, Mickaël Salaün wrote:
> From: Mickaël Salaün <m...@linux.microsoft.com>
> Before exposing this new key type to user space, make sure that only
> meaningful blacklisted hashes are accepted.  This is also checked for
> builtin blacklisted hashes, but a following commit make sure that the
> user will notice (at built time) and will fix the configuration if it
> already included errors.
> Check that a blacklist key description starts with a valid prefix and
> then a valid hexadecimal string.
> Cc: David Howells <dhowe...@redhat.com>
> Cc: David Woodhouse <dw...@infradead.org>
> Signed-off-by: Mickaël Salaün <m...@linux.microsoft.com>
> Acked-by: Jarkko Sakkinen <jar...@kernel.org>

In this I'm not as worried about ABI, i.e. you don't have any reason
supply any other data, which doesn't follow these ruels, whereas there
could very well be a script that does format hex "incorrectly".


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