assertThrows(SmbException.class, () -> new SMB1SigningDigest(mockTransport, mockAuth));
    }

    @Test
    @DisplayName("Test update method with valid data")
    void testUpdateWithValidData() {
        SMB1SigningDigest digest = new SMB1SigningDigest(testMacSigningKey);
        byte[] data = new byte[] { 0x01, 0x02, 0x03, 0x04 };

        assertDoesNotThrow(() -> digest.update(data, 0, data.length));