Function bearssl_sys::br_ssl_key_export

pub unsafe extern "C" fn br_ssl_key_export(
    cc: *mut br_ssl_engine_context, 
    dst: *mut c_void, 
    len: usize, 
    label: *const c_char, 
    context: *const c_void, 
    context_len: usize
) -> c_int