Function libsodium_sys::crypto_kdf_hkdf_sha256_expand

pub unsafe extern "C" fn crypto_kdf_hkdf_sha256_expand(
    out: *mut c_uchar,
    out_len: usize,
    ctx: *const c_char,
    ctx_len: usize,
    prk: *const c_uchar
) -> c_int