OpenSSL 是一个安全套接字层密码库，囊括主要的密码算法、常用的密钥和证书封装管理功能及SSL协议，用来实现网络通信的高强度加密，现在被广泛地用于各种网络应用程序中。

您也可以到下面的链接去下载

https://slproweb.com/products/Win32OpenSSL.html

File Type Description
Win32 OpenSSL v1.1.0f Light 3MB Installer Installs the most commonly used essentials of Win32 OpenSSL v1.1.0f (Recommended for users by the creators of OpenSSL). Note that this is a default build of OpenSSL and is subject to local and state laws. More information can be found in the legal agreement of the installation.
Win32 OpenSSL v1.1.0f 30MB Installer Installs Win32 OpenSSL v1.1.0f (Recommended for software developers by the creators of OpenSSL). Note that this is a default build of OpenSSL and is subject to local and state laws. More information can be found in the legal agreement of the installation.
Win64 OpenSSL v1.1.0f Light 3MB Installer Installs the most commonly used essentials of Win64 OpenSSL v1.1.0f (Only install this if you need 64-bit OpenSSL for Windows. Only installs on 64-bit versions of Windows. Note that this is a default build of OpenSSL and is subject to local and state laws. More information can be found in the legal agreement of the installation.
Win64 OpenSSL v1.1.0f 33MB Installer Installs Win64 OpenSSL v1.1.0f (Only install this if you are a software developer needing 64-bit OpenSSL for Windows. Only installs on 64-bit versions of Windows. Note that this is a default build of OpenSSL and is subject to local and state laws. More information can be found in the legal agreement of the installation.
Win32 OpenSSL v1.0.2L Light 2MB Installer Installs the most commonly used essentials of Win32 OpenSSL v1.0.2L (Recommended for users by the creators of OpenSSL). Note that this is a default build of OpenSSL and is subject to local and state laws. More information can be found in the legal agreement of the installation.
Win32 OpenSSL v1.0.2L 20MB Installer Installs Win32 OpenSSL v1.0.2L (Recommended for software developers by the creators of OpenSSL). Note that this is a default build of OpenSSL and is subject to local and state laws. More information can be found in the legal agreement of the installation.
Win64 OpenSSL v1.0.2L Light 3MB Installer Installs the most commonly used essentials of Win64 OpenSSL v1.0.2L (Only install this if you need 64-bit OpenSSL for Windows. Only installs on 64-bit versions of Windows. Note that this is a default build of OpenSSL and is subject to local and state laws. More information can be found in the legal agreement of the installation.
Win64 OpenSSL v1.0.2L 23MB Installer Installs Win64 OpenSSL v1.0.2L (Only install this if you are a software developer needing 64-bit OpenSSL for Windows. Only installs on 64-bit versions of Windows. Note that this is a default build of OpenSSL and is subject to local and state laws. More information can be found in the legal agreement of the installation.