The OpenSSL Project is a collaborative effort to develop a robust,
commercial-grade, fully featured, and Open Source toolkit implementing the
Transport Layer Security (TLS) protocols (including SSLv3) as well as a
full-strength general purpose cryptographic library.
OpenSSL is descended from the SSLeay library developed by Eric A. Young
and Tim J. Hudson. The OpenSSL toolkit is licensed under a dual-license (the
OpenSSL license plus the SSLeay license), which means that you are free to
get and use it for commercial and non-commercial purposes as long as you
fulfill the conditions of both licenses.
Download OpenSSL 1.1.2-dev Windows archives here below.
Windows binary packages for OpenSSL are available for Visual Studio 2013, 2015 and 2017 ABIs, 32bit and 64bit, for MinGW 5.3.0 32 bit and MinGW 7.3.0 64 bit.