Crate cfb_mode

Generic Cipher Feedback (CFB) mode implementation.

This crate implements CFB as a self-synchronizing stream cipher.

Security Warning

This crate does not ensure ciphertexts are authentic! Thus ciphertext integrity is not verified, which can lead to serious vulnerabilities!

Examples

use aes::Aes128;
use cfb_mode::Cfb;
use cfb_mode::cipher::{NewCipher, AsyncStreamCipher};
use hex_literal::hex;

type AesCfb = Cfb<Aes128>;

let key = b"very secret key.";
let iv = b"unique init vect";
let plaintext = b"The quick brown fox jumps over the lazy dog.";
let ciphertext = hex!("
    8f0cb6e8 9286cd02 09c95da4 fa663269
    bf7f286d 76820a4a f6cd3794 64cb6765
    8c764fa2 ce107f96 e1cf1dcd
");

let mut data = plaintext.to_vec();
// encrypt plaintext
AesCfb::new_from_slices(key, iv).unwrap().encrypt(&mut data);
assert_eq!(data, &ciphertext[..]);
// and decrypt it back
AesCfb::new_from_slices(key, iv).unwrap().decrypt(&mut data);
assert_eq!(data, &plaintext[..]);

// CFB mode can be used with streaming messages
let mut cipher = AesCfb::new_from_slices(key, iv).unwrap();
for chunk in data.chunks_mut(3) {
    cipher.encrypt(chunk);
}
assert_eq!(data, &ciphertext[..]);

Re-exports

pub use cipher;

Structs

Cfb	CFB self-synchronizing stream cipher instance.