wolfcrypt-wrapper 1.2.0

Rust wrapper for wolfssl C library cryptographic functionality
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#![cfg(hkdf)]

mod common;

use wolfcrypt_wrapper::hkdf::*;
use wolfcrypt_wrapper::hmac::HMAC;
use wolfcrypt_wrapper::sha::SHA256;

#[test]
fn test_hkdf_extract_expand() {
    common::setup();

    let ikm = b"MyPassword0";
    let salt = b"12345678ABCDEFGH";
    let mut extract_out = [0u8; SHA256::DIGEST_SIZE];
    hkdf_extract(HMAC::TYPE_SHA256, Some(salt), ikm, &mut extract_out)
        .expect("Error with hkdf_extract()");
    hkdf_extract_ex(
        HMAC::TYPE_SHA256,
        Some(salt),
        ikm,
        &mut extract_out,
        None,
        None,
    )
    .expect("Error with hkdf_extract_ex()");

    let info = b"0";
    let mut expand_out = [0u8; 16];
    hkdf_expand(HMAC::TYPE_SHA256, &extract_out, Some(info), &mut expand_out)
        .expect("Error with hkdf_expand()");
    hkdf_expand_ex(
        HMAC::TYPE_SHA256,
        &extract_out,
        Some(info),
        &mut expand_out,
        None,
        None,
    )
    .expect("Error with hkdf_expand_ex()");

    let expected_key = [
        0x17, 0x5F, 0x24, 0xB3, 0x18, 0x20, 0xF3, 0xD4, 0x71, 0x97, 0x8A, 0x98, 0x9E, 0xB2, 0xC1,
        0x35,
    ];
    assert_eq!(expand_out, expected_key);
}

#[test]
fn test_hkdf_one_shot() {
    common::setup();

    let ikm = b"MyPassword0";
    let salt = b"12345678ABCDEFGH";
    let info = b"0";
    let mut out = [0u8; 16];
    hkdf(HMAC::TYPE_SHA256, ikm, Some(salt), Some(info), &mut out).expect("Error with hkdf()");

    let expected_out = [
        0x17, 0x5F, 0x24, 0xB3, 0x18, 0x20, 0xF3, 0xD4, 0x71, 0x97, 0x8A, 0x98, 0x9E, 0xB2, 0xC1,
        0x35,
    ];
    assert_eq!(out, expected_out);
}