The OpenSSL NuGet package is currently dated June 12, 2013. The targets files for both openssl.1.0.1.24
and openssl.redist.1.0.1.24
contain the following condition:
$(PlatformToolset.ToLower().IndexOf('v110')) > -1
These preclude compilation and linking because VS2013 sets PlatformToolset = v120
by default. The targets will have to be updated for v120
(and for CTP_Nov2013
).
More here on compatibility between RTM and CTP compilers.