How to Generate and Verify Digital Signatures in Rust

Security Hardening
2026-04-17T12:05:42+00:00
Generate and verify digital signatures in Rust using the ring crate's Ed25519KeyPair to sign messages and verify their authenticity.

Use the ring or aws-lc-rs crates to generate signatures with sign and verify them with verify, as shown in the sqlx and actix-web source code using rustls.

use ring::signature::{self, Ed25519KeyPair, KeyPair};

fn main() {
    let key_pair = Ed25519KeyPair::generate_pkcs8().unwrap();
    let message = b"Hello, world!";
    let signature = key_pair.sign(message);
    let public_key = key_pair.public_key();
    
    let is_valid = public_key.verify(message, &signature).is_ok();
    println!("Signature valid: {}", is_valid);
}

Add ring = "0.17" to your Cargo.toml dependencies.