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SubjectRE: [PATCH] crypto: lib/arc4 - expose library interface
Date
From: Eric Biggers
> Sent: 15 July 2022 03:05
>
> On Thu, Jul 14, 2022 at 07:12:21AM +0200, Christian Marangi wrote:
> > Permit to compile the arc4 crypto lib without any user. This is required
> > by the backports project [1] that require this lib for any wireless
> > driver.
> >
> > [1] https://backports.wiki.kernel.org/index.php/Main_Page
> >
> > Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> > ---
> > lib/crypto/Kconfig | 6 +++++-
> > 1 file changed, 5 insertions(+), 1 deletion(-)
> >
> > diff --git a/lib/crypto/Kconfig b/lib/crypto/Kconfig
> > index 2082af43d51f..2dfc785a7817 100644
> > --- a/lib/crypto/Kconfig
> > +++ b/lib/crypto/Kconfig
> > @@ -6,7 +6,11 @@ config CRYPTO_LIB_AES
> > tristate
> >
> > config CRYPTO_LIB_ARC4
> > - tristate
> > + tristate "ARC4 library interface"
> > + help
> > + Enable the ARC4 library interface. This interface is mainly
> > + used by wireless drivers and is required by the backports
> > + project.
> >
> > config CRYPTO_ARCH_HAVE_LIB_BLAKE2S
> > bool
>
> I don't think this is appropriate for upstream, as the upstream kernel doesn't
> support out-of-tree code. This is also an internal API that can change from one
> kernel version to the next.

Out-of-tree code always has to allow for arbitrary changes to
kernel interfaces between kernel versions.
So the fact that the API might change isn't relevant.
The continual API changes keep some of us in a job :-)

(It has to be said that if I needed RC4 I'd probably add a local copy.)

David

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