}, "Should throw NullPointerException for null encryption key");
    }

    @Test
    @DisplayName("Should throw exception for null decryption key")
    void testNullDecryptionKey() {
        // When/Then
        assertThrows(NullPointerException.class, () -> {
            new Smb2EncryptionContext(1, DialectVersion.SMB311, testEncryptionKey, null);