Re: [PATCH 2/3] crypto: AF_ALG - disregard AAD buffer space for output

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On Wed, Nov 16, 2016 at 04:57:42PM +0800, Herbert Xu wrote:
> On Tue, Nov 15, 2016 at 08:06:47PM +0100, Stephan Mueller wrote:
> >
> > Shall the fix be rolled into the patch together with the fix for the tag value 
> > as well as the crash fix? Or can we have a stand-alone patch fixing this.
> 
> I think these are two separate issues and we don't need to fix them
> all in one go.
> 
> > Btw., how do you suggest that should be fixed? I would assume that this needs 
> > to be fixed on a per-implementation basis. I tested authenc and it copies the 
> > buffers over. gcm_base(ctr-aes-aesni,ghash-clmulni), rfc4106-gcm-aesni or 
> > ccm_base(ctr-aes-aesni,aes-aesni) do not copy the AD over.
> 
> We should fix as much as we can and then add a testmgr test to find
> the rest.

Alternatively we can add the copying code to algif_aead when src !=
dst.  I think that's probably the easier fix.

Thanks,
-- 
Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
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