Pure Rust implementation of the Concatenation Key Derivation Function (Concat KDF) generic over hash function. This function is described in the section 5.8.1 of NIST SP 800-56A, Recommendation for Pair-Wise Key Establishment Schemes Using Discrete Logarithm Cryptography.
The most common way to use Concat KDF is as follows: you generate a shared secret with other party (e.g. via Diffie-Hellman algorithm) and use key derivation function to derive a shared key.
use hex_literal::hex;
use sha2::Sha256;
let mut key = [0u8; 16];
concat_kdf::derive_key_into::<Sha256>(b"secret", b"shared-info", &mut key).unwrap();
assert_eq!(key, hex!("960db2c549ab16d71a7b008e005c2bdc"));Rust 1.81 or higher.
Minimum supported Rust version can be changed in the future, but it will be done with a minor version bump.
- All on-by-default features of this library are covered by SemVer
- MSRV is considered exempt from SemVer as noted above
Licensed under either of:
at your option.
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.