RustCrypto
Rustcrypto is an example crypto config & processor: crypto/rustcrypto
It provides no_std & no_alloc cryptography that we provide in our examples through it's implementation of CryptoConfig.
You can find rustcrypto primitives from here: https://github.com/rustcrypto/
In addition we use curve25519-dalek which can be foiund from here: https://github.com/dalek-cryptography/curve25519-dalek