curl/docs/cmdline-opts/engine.md

c	SPDX-License-Identifier	Long	Arg	Help	Protocols	Category	Added	Multi	See-also	Example
Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.	curl	engine	<name>	Crypto engine to use	TLS	tls	7.9.3	single	ciphers curves	--engine flavor $URL

--engine

Select the OpenSSL crypto engine to use for cipher operations. Use --engine list to print a list of build-time supported engines. Note that not all (and possibly none) of the engines may be available at runtime.