源码下载：https://www.openssl.org/source/  目前最新的1.0.2c

编译工具：ActiveState Perl from

VS(我使用的是VS2015)

其实整个编译过程，openssl写的很清楚，有很多编译选项。

下载源码解压之后可以看看install.win64文件内容。使用VS的X64本机工具命令提示行（通过管理员权限）运行如下命令即可

Compiling procedure
-------------------

You will need Perl. You can run under Cygwin or you can download
ActiveState Perl from

You will need Microsoft Platform SDK, available for download at
As per
April 2005 Platform SDK is equipped with Win64 compilers, as well
as assemblers, but it might change in the future.

To build for Win64/x64:

> perl Configure VC-WIN64A
> ms\do_win64a
> nmake -f ms\ntdll.mak
> cd out32dll
> ..\ms\test

没有问题一遍过，，在out32dll 上就能发现编译好的DLL

OpenSSL windows 下编译