Function boring_sys::SSL_export_keying_material

pub unsafe extern "C" fn SSL_export_keying_material(
    s: *mut SSL, 
    out: *mut c_uchar, 
    olen: size_t, 
    label: *const c_char, 
    llen: size_t, 
    context: *const c_uchar, 
    contextlen: size_t, 
    use_context: c_int
) -> c_int