Make Mac class prevent further updates or final after finalisation. Keep cached values for hashlib API.

2025-11-09 08:53:50 -06:00
parent 67c2958384
commit 62fc8fa855
10 changed files with 493 additions and 54 deletions
@@ -57,14 +57,11 @@ def bench_mac(ciph) -> None:
    buf = bytearray(MSG_LEN)
    buf[:] = _random_bytes(len(buf))

-    mac0 = ciph.Mac(key, nonce, maclen=ciph.MACBYTES_LONG)
    mac_out = bytearray(ciph.MACBYTES_LONG)

    t0 = time.perf_counter()
    for _ in range(ITERATIONS):
-        mac = mac0.clone()
-        mac.update(buf)
-        mac.final(into=mac_out)
+        m = ciph.mac(key, nonce, buf, maclen=ciph.MACBYTES_LONG, into=mac_out)
    t1 = time.perf_counter()

    _ = mac_out[0]