Author: Clément CHAPOT
Description: implementation of x25519 (see: RFC 7748) as part of INF568 course at École polytechnique

Build the project using make.

This calls cargo build --release and copies binary x25519 from target/release/ into the project root.

Run using ./x25519.

./x25519 can either be used to derive a public key from a private key (1 argument), or to derive a shared secret from a private key and a public key (two arguments)

For more precise usage information, use --help on the relevant binary.

cargo test checks if the binary and the intermediate functions produce the right output, by using the tests from the RFC.

The core of the project can be found in src/lib/.

src/lib/montgomery.rs provides functions to perform arithmetic on elliptic curves, which are used in src/lib/x25519.rs to implement Diffie-Hellman on the 25519 curve.

The file src/bin/x25519.rs is here to produce the binary, so it only contains a main function, which calls functions from src/lib/ directly.