我最近需要记录如何安装它的一个版本，所以我在这里复制了我的步骤，因为其他答案使用的是与我推荐的Cygwin不同的来源。我喜欢Cygwin，因为它维护得很好，并为Windows提供了大量其他实用程序。Cygwin还允许您在修复漏洞时根据需要轻松更新版本。请经常更新您的OpenSSL版本!

打开Windows命令提示符，输入:OpenSSL version检查是否安装了OpenSSL

如果您得到命令无法识别的错误消息，那么按照以下总结步骤参考Cygwin安装OpenSSL:

基本上，下载并运行Cygwin Windows安装应用程序来安装和更新OpenSSL应用程序:

Select an install directory, such as C:\cygwin64. Choose a download mirror such as: http://mirror.cs.vt.edu Enter in openssl into the search and select it. You can also select/un-select other items of interest at this time. The click Next twice then click Finish. After installing, you need to edit the PATH variable. On Windows, you can access the System Control Center by pressing Windows Key + Pause. In the System window, click Advanced System Settings → Advanced (tab) → Environment Variables. For Windows 10, a quick access is to enter "Edit the system environment variables" in the Start Search of Windows and click the button "Environment Variables". Change the PATH variable (double-click on it or Select and Edit), and add the path where your Cywgwin is, e.g. C:\cygwin\bin. Verify you have it installed via a new Command Prompt window: openssl version. For example: C:\Program Files\mosquitto>openssl versionOpenSSL 1.1.1f 31 Mar 2020 If not, refer to the Cygwin documentation and also other tutorials such as: https://www.eclipse.org/4diac/documentation/html/installation/cygwin.html

Necroposting，但可能对其他人有用:

There's always the official page ([OpenSSL.Wiki]: Binaries) which contains useful URLs (pointing to unofficial resources / builds, make sure to read the Important Disclaimer) There are other repositories which contain unofficial builds Here I want to mention: [GitHub]: CristiFati/Prebuilt-Binaries - Prebuilt-Binaries/OpenSSL v1.0.2u (FIPS capable) is built with OpenSSL-FIPS 2.0.16 Artefacts are .zips that should be unpacked in "C:\Program Files" (please take a look at the Readme.md file, and also at the one at the repository root) Other 3rd-party software may bundle OpenSSL, so it gets "installed" as a side effect. Such software (mentioned by other answers): Cygwin, Git And of course you can build it yourself from sources, but that requires some deeper knowledge

注意:当你有一个功能性的OpenSSL实例时(使用上面的任何方法)，下面是你如何从VStudio中使用它(如果你需要它到你自己的项目中):

你可以从这里获取https://slproweb.com/products/Win32OpenSSL.html

得到https://wiki.openssl.org/index.php/Binaries的支持和认可

安装铲斗，然后打字

scoop install openssl

我从https://slproweb.com/products/Win32OpenSSL.html安装了openssl 3.0.0。然后我进入windows start ->openssl->Win64 openssl命令提示符，它会打开一个像常规dos窗口一样的窗口，我所需要的就是进入openssl的安装文件夹。

检查openssl工具，这是一个来自LibreSSL项目和Cygwin库的openssl集合(2.5 MB)。NB !我们是包装商。

创建自签名证书的一行代码:

Openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout selfsigned。输出self - signed.crt