RustCrypto: block ciphers 
Collection of block ciphers and block modes written in pure Rust.
Warnings
Currently only the aes crate provides constant-time implementation.
If you do not really know what you are doing, it's generally recommended not to
use other cipher implementations in this repository.
Additionally, crates in this repository have not yet received any formal cryptographic and security reviews.
USE AT YOUR OWN RISK.
Supported algorithms
| Name | Crate name | crates.io | Docs | Build Status |
|---|---|---|---|---|
| AES (Rijndael) | aes |
 |
 |
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| Blowfish | blowfish |
 |
 |
 |
| CAST5 (CAST-128) | cast5 |
 |
 |
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| DES + 3DES (DEA, 3DEA) | des |
 |
 |
 |
| IDEA | idea |
 |
 |
 |
| Kuznyechik (GOST R 34.12-2015) | kuznyechik |
 |
 |
 |
| Magma (GOST 28147-89 and GOST R 34.12-2015) | magma |
 |
 |
 |
| RC2 (ARC2) | rc2 |
 |
 |
 |
| Serpent | serpent |
 |
 |
 |
| SM4 | sm4 |
 |
 |
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| Twofish | twofish |
 |
 |
 |
| Threefish | threefish |
 |
 |
 |
Additional crates
| Crate name | crates.io | Docs | Build Status |
|---|---|---|---|
block-modes |
 |
 |
 |
gost-modes |
 |
 |
 |
Minimum Supported Rust Version
All crates in this repository support Rust 1.22 or higher. (except aesni and
aes crates, which require Rust 1.27) In future minimum supported Rust version
can be changed, but it will be done with the minor version bump.
Usage
Block cipher crates provide only bare block cipher implementations. For most
applications you will need to use some block cipher mode of operation
which are generically implemented in the block-modes crate.
Some block modes (CTR, CFB, OFV) transform block ciphers into stream ciphers.Such modes are published under separate crates in the RustCrypto/stream-ciphers repository.
Lets use AES128-CBC with PKCS7 padding to show an example:
use aes::Aes128;
use block_modes::{BlockMode, Cbc};
use block_modes::block_padding::Pkcs7;
use hex_literal::hex;
// create an alias for convenience
type Aes128Cbc = Cbc<Aes128, Pkcs7>;
let key = hex!("000102030405060708090a0b0c0d0e0f");
let iv = hex!("f0f1f2f3f4f5f6f7f8f9fafbfcfdfeff");
let plaintext = b"Hello world!";
let cipher = Aes128Cbc::new_from_slices(&key, &iv).unwrap();
// buffer must have enough space for message+padding
let mut buffer = [0u8; 32];
// copy message to the buffer
let pos = plaintext.len();
buffer[..pos].copy_from_slice(plaintext);
let ciphertext = cipher.encrypt(&mut buffer, pos).unwrap();
assert_eq!(ciphertext, hex!("1b7a4c403124ae2fb52bedc534d82fa8"));
// re-create cipher mode instance and decrypt the message
let cipher = Aes128Cbc::new_from_slices(&key, &iv).unwrap();
let mut buf = ciphertext.to_vec();
let decrypted_ciphertext = cipher.decrypt(&mut buf).unwrap();
assert_eq!(decrypted_ciphertext, plaintext);With an enabled std feature (which is enabled by default) you can use
encrypt_vec and decrypt_vec methods:
let cipher = Aes128Cbc::new_from_slices(&key, &iv).unwrap();
let ciphertext = cipher.encrypt_vec(plaintext);
assert_eq!(ciphertext, hex!("1b7a4c403124ae2fb52bedc534d82fa8"));
let cipher = Aes128Cbc::new_from_slices(&key, &iv).unwrap();
let decrypted_ciphertext = cipher.decrypt_vec(&ciphertext).unwrap();
assert_eq!(decrypted_ciphertext, plaintext);Note that this example does not use any authentification which can lead to serious vulnarabilities! For Message Authentication Code implementations take a look at RustCrypto/MACs repository.
License
All crates licensed under either of
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.