Crow/docs/guides/ssl.md

Crow supports HTTPS though SSL or TLS.

When mentioning SSL in this documentation, it is often a reference to openSSL, which includes TLS. Don't worry, we don't use obsolete security standards :)

To enable SSL, first your application needs to define either a .crt and .key files, or a .pem file. Once you have your files, you can add them to your app like this:
#!cpp app.ssl_file("/path/to/cert.crt", "/path/to/keyfile.key") or #!cpp app.ssl_file("/path/to/pem_file.pem"). Please note that this method can be part of the app method chain, which means it can be followed by .run() or any other method.

You can also set your own SSL context (by using boost::asio::ssl::context ctx) and then applying it via the #!cpp app.ssl(ctx) method.

!!! warning

If you plan on using a proxy like Nginx or Apache2, **DO NOT** use SSL in crow, instead define it in your proxy and keep the connection between the proxy and Crow non-SSL.