Re: [Xen-devel] [PATCH] implement md5 in blktap2, remove ssl dependency

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Mon, 7 Jun 2010, Keir Fraser wrote:
> On 04/06/2010 15:22, "Stefano Stabellini" <Stefano.Stabellini@xxxxxxxxxxxxx>
> wrote:
> 
> > Hi all,
> > I am adding a public domain implementation of md5 to blktap2, so that it
> > doesn't need ssl or gcrypt to work anymore.
> 
> Why is that better than requiring installation of one of gcrypt or crypto
> libs?
> 

Because we are requiring installation (and redistribution in case of
products based on Xen) of a crypto library just for a simple MD5
checksum function.

Redistributing a crypto library is not easy: openssl is difficult to
redistribute due to the BSD advert clause, while gcrypto on the other
hand is difficult to redistribute outside of the United States as part
of a product because it requires explicit authorization for the exact
libgcrypto binary you are using.
I know that Debian and other distros have already sorted out all that,
but I still think that introducing all this pain just for an MD5
function is unreasonable.

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