lazychacha-rs

Lazy ChaCha20-Poly1305 in Rust base on RustCrypto: ChaCha20Poly1305.

Algorithm details

• Key exchange: X25519
• Encryption: ChaCha20
• Authentication: Poly1305

Benchmark

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encrypt                 time:   [1.2343 µs 1.2372 µs 1.2407 µs]
                        change: [-1.9100% -1.5520% -1.2222%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 7 outliers among 100 measurements (7.00%)
  5 (5.00%) high mild
  2 (2.00%) high severe
Benchmarking decrypt: Warming up for 3.0000 s
decrypt                 time:   [1.0420 µs 1.0439 µs 1.0462 µs]
                        change: [-16.591% -14.215% -12.124%] (p = 0.00 < 0.05)
                        Performance has improved.
Found 4 outliers among 100 measurements (4.00%)
  2 (2.00%) high mild
  2 (2.00%) high severe

How to use

• Generate KeyPair

let keypair = KeyPair::new();

• Key Exchange & Shared Key

let client_kp = KeyPair::new();
let server_kp = KeyPair::new();
let server_pk = server_kp.pk_string();

let shared_key = SharedKey::new(server_pk, client_kp.sk);

• Encrypt

let lazychacha = LazyChaCha::new();
let shared_key = SharedKey::new(server_pk, client_kp.sk);
let plaintext = r#"{"message": "hi"}"#;

let ciphertext = lazychacha.encrypt(plaintext, shared_key);

• Decrypt

let lazychacha = LazyChaCha::new();
let shared_key = SharedKey::new(server_pk, client_kp.sk);
let ciphertext = "58b99ca4a7";

let plaintext = lazychacha.decrypt(ciphertext, shared_key);