We already use Crypto++ for DES anyway, and using OpenSSL is not great because
of its incompatible licence.
Change-Id: I78771b84c1708795a0c0c30afa5bdfe4885dea4e
There was a lot of copy and paste, and the code was just crap. This commit tries
to clarify the code and also document the encryption procedure. Hopefully I didn't
break anything.
Change-Id: I257793010e7cf94f2b090b30bb8608359d3886e3
