RustCrypto: OCB3

Pure Rust implementation of the Offset Codebook Mode v3 (OCB3) Authenticated Encryption with Associated Data (AEAD) cipher as described in RFC7253.

Documentation

Example

use aes::Aes128;
use ocb3::{
    aead::{Aead, AeadCore, KeyInit, array::Array},
    consts::U12,
    Ocb3,
};

type Aes128Ocb3 = Ocb3<Aes128, U12>;

let key = Aes128::generate_key().expect("key generation failure");
let cipher = Aes128Ocb3::new(&key);
let nonce = Aes128Ocb3::generate_nonce().expect("nonce failure");
let ciphertext = cipher.encrypt(&nonce, b"plaintext message".as_ref()).unwrap();
let plaintext = cipher.decrypt(&nonce, ciphertext.as_ref()).unwrap();

assert_eq!(&plaintext, b"plaintext message");

Security Notes

No security audits of this crate have ever been performed, and it has not been thoroughly assessed to ensure its operation is constant-time on common CPU architectures.

USE AT YOUR OWN RISK!

License

Licensed under either of:

• Apache License, Version 2.0
• MIT license

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.