Re: [PATCH 0/4] crypto: caam - add ecb mode support

[Eric Biggers]

On Fri, Feb 15, 2019 at 01:24:42PM +0800, Herbert Xu wrote:
> On Wed, Feb 13, 2019 at 10:51:36AM -0800, Eric Biggers wrote:
> >
> > You are claiming you need DES-ECB, 3DES-ECB, *and* ARC4 for that?
> > 
> > Which one is it actually, if any?
> 
> Since these are existing algorithms in the crypto API and we're
> simply adding them to the driver I think the bar of acceptance
> is lower than if it were a completely new addition to the kernel.
> 
> Thanks,
> -- 
> Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
> Home Page: http://gondor.apana.org.au/~herbert/
> PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

Sure, but the bar shouldn't be so low that new implementations of insecure
algorithms the world is moving away from are accepted without a real use case.
We should be moving towards removing these algorithms instead.  The original DES
is especially bad as it only has a 56-bit key.  I'd like to better understand
if/why people claim to not only still need these algorithms in 2019, but also
need brand new implementations of them.

- Eric