Crate rc4 

RustCrypto: RC4

Pure Rust implementation of the RC4 stream cipher.

🚨 Warning: Cryptographically Broken 🚨

RC4 is cryptographically broken and unsuitable for further use!

RFC7465 and RFC8758 prohibit the use of RC4 in TLS and SSH protocols respectively, noting that cryptographic weaknesses in the cipher’s design make it practical to recover repeatedly encrypted plaintexts.

This crate is provided for the purposes of legacy interoperability with protocols and systems which continue to mandate the use of RC4. It should not be relied on for security/confidentiality.

USE AT YOUR OWN RISK!

Examples

use hex_literal::hex;
use rc4::{KeyInit, Rc4, StreamCipher};

let mut rc4 = Rc4::new_from_slice(b"Key").unwrap();
let mut data = *b"Plaintext";
rc4.apply_keystream(&mut data);
assert_eq!(data, hex!("BBF316E8D940AF0AD3"));

let mut rc4 = Rc4::new_from_slice(b"Wiki").unwrap();
let mut data = *b"pedia";
rc4.apply_keystream(&mut data);
assert_eq!(data, hex!("1021BF0420"));

let mut rc4 = Rc4::new_from_slice(b"Secret").unwrap();
let mut data = *b"Attack at dawn";
rc4.apply_keystream(&mut data);
assert_eq!(data, hex!("45A01F645FC35B383552544B9BF5"));

Note that Rc4 accepts keys of 1 to 256 bytes, though short keys are insecure and real-world usage typically uses 5–32 bytes (40–256 bits).

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.

Re-exports

pub use cipher;

Modules

consts

Structs

Rc4

RC4 stream cipher.

Traits

KeyInit

Types which can be initialized from a key.

StreamCipher

Stream cipher trait.