curl/docs/RUSTLS.md

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Rustls

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 depends on version v0.7.0 of crustls.

Building with rustls

First, install Rust.

Next, check out, build, and install the appropriate version of crustls:

% cargo install cbindgen
% git clone https://github.com/rustls/rustls-ffi -b v0.7.0
% cd crustls
% make
% make DESTDIR=${HOME}/crustls-built/ install

Now configure and build curl with rustls:

% git clone https://github.com/curl/curl
% cd curl
% ./buildconf
% ./configure --with-rustls=${HOME}/crustls-built
% make