On 10/08/2016 19:02, Norm Green wrote: > I've been wondering how and when OpenSSL decides whether it can use > the new aes instructions? Does it decide at build time or at run time? > > If I build on a CPU that supports aes instructions but run on a cpu > that does not, will bad things happen? Or is OpenSSL smart enough to > call functions implemented without aes instructions in that case? > > Runtime. See the file crypto/x86cpuid.pl which gets converted to compiler-specific assembler source code. Enjoy Jakob -- Jakob Bohm, CIO, Partner, WiseMo A/S. https://www.wisemo.com Transformervej 29, 2860 S?borg, Denmark. Direct +45 31 13 16 10 This public discussion message is non-binding and may contain errors. WiseMo - Remote Service Management for PCs, Phones and Embedded
