Rustls is a TLS backend written in Rust. curl can
be built to use it as an alternative to OpenSSL or other TLS backends. We use
the rustls-ffi C bindings. This
version of curl is compatible with rustls-ffi
v0.14.x.
First, install Rust.
Next, check out, build, and install the appropriate version of rustls-ffi:
% git clone https://github.com/rustls/rustls-ffi -b v0.14.1
% cd rustls-ffi
% make
% make DESTDIR=${HOME}/rustls-ffi-built/ install
Now configure and build curl with Rustls:
% git clone https://github.com/curl/curl
% cd curl
% autoreconf -fi
% ./configure --with-rustls=${HOME}/rustls-ffi-built
% make
See the rustls-ffi README for more information on cryptography providers and their build/platform requirements.