Necessary to get working builds on my Fedora 29 system. Change-Id: Ia6232427c959629ade9a85fc412738f688facedb
We already use Crypto++ for DES anyway, and using OpenSSL is not great because of its incompatible licence. Change-Id: I78771b84c1708795a0c0c30afa5bdfe4885dea4e