Re: [Mldonkey-users] Sha1 implementation benchmark

[Fortin Denis]

Le mer 04/02/2004 à 22:32, kami petersen a écrit :
> Fortin Denis wrote:
> 
> >Le mer 04/02/2004 à 20:40, kami petersen a écrit :
> >  
> >
> >>Fortin Denis wrote:
> >>    
> >>
> >>>I've added another implementation of sha1 hash. It's 
> >>>written by Brian Gladman and can be found here :
> >>>http://fp.gladman.plus.com/cryptography_technology/sha/index.htm
> >>>
> >>>Before everything else i would like to make sure that the licence is ok
> >>>for mldonkey.
> >>>
> >>it sounds like a bsd-style license, and as such it should be 100% 
> >>compatible with the gpl, even without the extra notice he's included. 
> >>for compatibility see the page on licenses on http://www.gnu.org/
> >>
> >>if you choose to add the gpl to it, then copyleft of this particular 
> >>code and changes to it is enforced.
> >>
> >>/kami
> >>    
> >>
> >The 'problem' for me is this : 
> >In my understanding the GPL allow me to modify all things in the file
> >except the gpl itself, including the notice. So under the gpl i should
> >be to remove the author's notice. 
> >But i'm allowed to use this file under GPL if and only if keep this
> >notice.
> >
> >Denis Fortin
> >
> >  
> >
> the gpl can not allow you to edit the authors' licence.
> 
> the author's licence has to be retained, but you can add the gpl to it 
> as well. this is no problem.
> 
> the author's licence does not limit the gpl in any way.
> 
> the note in the author's licence that you may combine it with the gpl is 
> unnecessary, you could do it anyway, unless had it contained demands 
> that were in conflict with the gpl.
> 
> by merging this code with mldonkey you will be combining the two 
> licenses, but the author's license does not, of course, affect any other 
> mldonkey code that is not derived from the author's work, and should not 
> be added to other code.
> 
> so... what you should do is:
> 
> 1 insert the normal heading from the mldonkey files:
> 
> (*
>     This file is part of mldonkey.
> 
>     mldonkey is free software; you can redistribute it and/or modify
>     it under the terms of the GNU General Public License as published by
>     the Free Software Foundation; either version 2 of the License, or
>     (at your option) any later version.
> 
>     mldonkey is distributed in the hope that it will be useful,
>     but WITHOUT ANY WARRANTY; without even the implied warranty of
>     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
>     GNU General Public License for more details.
> 
>     You should have received a copy of the GNU General Public License
>     along with mldonkey; if not, write to the Free Software
>     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
> *)
> 
> 2 keep the original copyright notice, and licence. don't mess with it. 
> don't add your own copyright, you can do this only on things that you 
> write yourself from scratch.
> 
> 3 submit it to the repository.
> 
> there is no problem. i think =)
> 
> /kami
Thanks for this explanation.
I will submit a proper patch with this heading, if the test is
conclusive.

Denis Fortin