hpke-rs 0.6.0

HPKE Implementation
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26

use hpke_rs_crypto::{types::KdfAlgorithm, HpkeCrypto};
use hpke_rs_libcrux::HpkeLibcrux;

use crate::test_util::hex_to_bytes;

#[test]
fn test_hkdf_sha256() {
    let ikm = hex_to_bytes("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b");
    let salt = hex_to_bytes("000102030405060708090a0b0c");
    let info = hex_to_bytes("f0f1f2f3f4f5f6f7f8f9");
    let len = 42;

    let expected_prk =
        hex_to_bytes("077709362c2e32df0ddc3f0dc47bba6390b6c73bb50f9c3122ec844ad7c2b3e5");
    let expected_okm = hex_to_bytes(
        "3cb25f25faacd57a90434f64d0362f2a2d2d0a90cf1a5a4c5db02d56ecc4c5bf34007208d5b887185865",
    );

    let prk = HpkeLibcrux::kdf_extract(KdfAlgorithm::HkdfSha256, &salt, &ikm)
        .expect("Error extracting with HKDF");
    let okm = HpkeLibcrux::kdf_expand(KdfAlgorithm::HkdfSha256, &prk, &info, len)
        .expect("Error expanding with HKDF");

    assert_eq!(&expected_prk, &prk);
    assert_eq!(&expected_okm, &okm);
}