This is a port of libsodium - A modern, portable, easy to use crypto library.
We use libsodium 1.0.18 as the base (see libsodium submodule) with some simple patches in port/port_include to make the library compile with the platformio build system.
Only a subset of libsodium is compiled, namely the cryptographic primitives required for noise-c.
libsodium is licensed under the ISC License