* vmx ghash buggy on ppc64le
@ 2017-09-19 3:18 Herbert Xu
2017-10-16 23:09 ` Paulo Flabiano Smorigo
0 siblings, 1 reply; 3+ messages in thread
From: Herbert Xu @ 2017-09-19 3:18 UTC (permalink / raw)
To: Paulo Flabiano Smorigo, Linux Crypto Mailing List
Hi:
I have received a report that ghash on ppc64le does not interoperate
with other implementations of ghash, e.g., on x86-64.
https://bugzilla.redhat.com/show_bug.cgi?id=1490972
Could you guys take a look at this and see if this is a bug in
the mainline vmx driver too?
Thanks!
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: vmx ghash buggy on ppc64le
2017-09-19 3:18 vmx ghash buggy on ppc64le Herbert Xu
@ 2017-10-16 23:09 ` Paulo Flabiano Smorigo
2017-10-17 13:10 ` Herbert Xu
0 siblings, 1 reply; 3+ messages in thread
From: Paulo Flabiano Smorigo @ 2017-10-16 23:09 UTC (permalink / raw)
To: Herbert Xu; +Cc: Linux Crypto Mailing List
Tue, Sep 19, 2017 at 11:18:45AM +0800, Herbert Xu wrote:
> Hi:
>
> I have received a report that ghash on ppc64le does not interoperate
> with other implementations of ghash, e.g., on x86-64.
>
> https://bugzilla.redhat.com/show_bug.cgi?id=1490972
>
> Could you guys take a look at this and see if this is a bug in
> the mainline vmx driver too?
>
> Thanks!
> --
> Email: Herbert Xu <herbert@gondor.apana.org.au>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
>
Hi Herbert,
It seems that this bug is affected by the fact that ctr mode is using
blkcipher for the fallback.
I just sent a patch [1] to make it use skcipher and, since then, ipsec
with ikev2 and ghash are working fine for ppc64 and ppc64le.
Best regards,
--
Paulo Flabiano Smorigo
IBM Linux Technology Center
[1] https://lkml.org/lkml/2017/10/16/911
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: vmx ghash buggy on ppc64le
2017-10-16 23:09 ` Paulo Flabiano Smorigo
@ 2017-10-17 13:10 ` Herbert Xu
0 siblings, 0 replies; 3+ messages in thread
From: Herbert Xu @ 2017-10-17 13:10 UTC (permalink / raw)
To: Paulo Flabiano Smorigo; +Cc: Linux Crypto Mailing List
On Mon, Oct 16, 2017 at 09:09:53PM -0200, Paulo Flabiano Smorigo wrote:
> Tue, Sep 19, 2017 at 11:18:45AM +0800, Herbert Xu wrote:
> > Hi:
> >
> > I have received a report that ghash on ppc64le does not interoperate
> > with other implementations of ghash, e.g., on x86-64.
> >
> > https://bugzilla.redhat.com/show_bug.cgi?id=1490972
> >
> > Could you guys take a look at this and see if this is a bug in
> > the mainline vmx driver too?
> >
> > Thanks!
> > --
> > Email: Herbert Xu <herbert@gondor.apana.org.au>
> > Home Page: http://gondor.apana.org.au/~herbert/
> > PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
> >
>
> Hi Herbert,
>
> It seems that this bug is affected by the fact that ctr mode is using
> blkcipher for the fallback.
>
> I just sent a patch [1] to make it use skcipher and, since then, ipsec
> with ikev2 and ghash are working fine for ppc64 and ppc64le.
Thanks!
--
Email: Herbert Xu <herbert@gondor.apana.org.au>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
^ permalink raw reply [flat|nested] 3+ messages in thread
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