On Fri, 2017-05-05 at 15:52 +0200, Michal Suchánek wrote: > > So you have an e-mail message from one of the authors of the code. > Andy Polyakov wrote most of the code but there are probably other > contributors who never gave explicit consent for using their code > outside of OpenSSL. The only contributions to that file in OpenSSL that isn't from Andy are a whitespace fix and the addition of the licence :-) If that makes you feel better we could undo the whitespace fix :-) I've checked the other PowerPC related files in there and the situation is identical (aes-ppc.pl does have also a spelling fix in comments). At this point, it's pretty clear that this code is authored solely by Andy who gave permission to use it. Cheers, Ben.