ed25519 Signature

⚠️ DO NOT USE IN PRODUCTION. I made this project to learn the cryptographic principles behind this algorithm, with few considerations for side-channel attacks.

Made as part of the Advanced Cryptography course at École polytechnique, by Prof. Benjamin Smith.

Author: Thomas Sauvage.

Extension

• I implemented Multiexponentiation with Straus’ algorithm. See the straus_multiexponentiation function in src/ed25519/points.rs.

Installation

• Install Rust

Usage

• See the doc :

cargo run --bin keygen -- --help
cargo run --bin sign   -- --help
cargo run --bin verify -- --help

• You can also build the app with the following command, the executable will be at target/release

cargo build --release
cd target/release

Examples

cargo run --bin keygen examples/key
cargo run --bin sign examples/key.sk README.md examples/README_sig
cargo run --bin verify examples/key.pk README.md examples/README_sig

Tests

• Launch automated tests:

cargo test --release

Note: This test runs more than a 4000 signatures and verifications so it may take some time (5.5s on my machine).