Function mbedtls_sys::hkdf_expand

pub unsafe extern "C" fn hkdf_expand(
    md: *const md_info_t, 
    prk: *const c_uchar, 
    prk_len: size_t, 
    info: *const c_uchar, 
    info_len: size_t, 
    okm: *mut c_uchar, 
    okm_len: size_t
) -> c_int