> -----Original Message-----
> From: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Sent: Tuesday, September 6, 2022 12:13 PM
> To: Pankaj Gupta <pankaj.gupta@xxxxxxx>
> Cc: jarkko@xxxxxxxxxx; a.fatoum@xxxxxxxxxxxxxx; Jason@xxxxxxxxx;
> jejb@xxxxxxxxxxxxx; zohar@xxxxxxxxxxxxx; dhowells@xxxxxxxxxx;
> sumit.garg@xxxxxxxxxx; david@xxxxxxxxxxxxx; michael@xxxxxxxx;
> john.ernberg@xxxxxxxx; jmorris@xxxxxxxxx; serge@xxxxxxxxxx;
> davem@xxxxxxxxxxxxx; j.luebbe@xxxxxxxxxxxxxx; ebiggers@xxxxxxxxxx;
> richard@xxxxxx; keyrings@xxxxxxxxxxxxxxx; linux-crypto@xxxxxxxxxxxxxxx;
> linux-integrity@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux-
> security-module@xxxxxxxxxxxxxxx; Sahil Malhotra
> <sahil.malhotra@xxxxxxx>; Kshitiz Varshney <kshitiz.varshney@xxxxxxx>;
> Horia Geanta <horia.geanta@xxxxxxx>; Varun Sethi <V.Sethi@xxxxxxx>
> Subject: [EXT] Re: [RFC PATCH HBK: 2/8] hw-bound-key: flag-is_hbk added to
> the tfm
>
> Caution: EXT Email
>
> On Tue, Sep 06, 2022 at 12:21:51PM +0530, Pankaj Gupta wrote:
> > Consumer of the kernel crypto api, after allocating the
> > transformation, sets this flag based on the basis of the type of key
> > consumer has. This helps:
> >
> > - This helps to influence the core processing logic
> > for the encapsulated algorithm.
> > - This flag is set by the consumer after allocating
> > the tfm and before calling the function crypto_xxx_setkey().
> >
> > Signed-off-by: Pankaj Gupta <pankaj.gupta@xxxxxxx>
> > ---
> > include/linux/crypto.h | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/include/linux/crypto.h b/include/linux/crypto.h index
> > 2324ab6f1846..b4fa83ca87bd 100644
> > --- a/include/linux/crypto.h
> > +++ b/include/linux/crypto.h
> > @@ -639,6 +639,8 @@ struct crypto_tfm {
> >
> > u32 crt_flags;
> >
> > + unsigned int is_hbk;
> > +
>
> We already have plenty of drivers with hardware keys in the tree.
> Plesae explain why the current support is inadequate and you need to do
> this.
>
Current support, does not permit the hardware to support both types of keys: HBK & Plain Key, at the same time.
This change is generic and permit any driver that supports both- HBK and plain-key, to differentiate and use the keys accordingly.
> Thanks,
> --
> Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page:
> https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgondo
> r.apana.org.au%2F~herbert%2F&data=05%7C01%7Cpankaj.gupta%40nx
> p.com%7Cffd6105be88e4b82546c08da8fd33b6e%7C686ea1d3bc2b4c6fa92cd9
> 9c5c301635%7C0%7C0%7C637980434686220485%7CUnknown%7CTWFpbGZs
> b3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn
> 0%3D%7C3000%7C%7C%7C&sdata=AErrjpwh%2FRZSCNDDbtH%2FWW
> %2B39J%2FrxPJwak2X2Fk%2BWBg%3D&reserved=0
> PGP Key:
> https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fgondo
> r.apana.org.au%2F~herbert%2Fpubkey.txt&data=05%7C01%7Cpankaj.g
> upta%40nxp.com%7Cffd6105be88e4b82546c08da8fd33b6e%7C686ea1d3bc2
> b4c6fa92cd99c5c301635%7C0%7C0%7C637980434686220485%7CUnknown%7
> CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwi
> LCJXVCI6Mn0%3D%7C3000%7C%7C%7C&sdata=%2F7axxa8nrYDiItrwcZi
> AfRTVc%2F25Ln5IgUzr%2F1uK%2FNk%3D&reserved=0
