assertTrue(messageBytes.length >= 12);
        // Message type should be 1 (little endian)
        assertEquals(1, messageBytes[8] & 0xFF);
        assertEquals(0, messageBytes[9] & 0xFF);
        assertEquals(0, messageBytes[10] & 0xFF);
        assertEquals(0, messageBytes[11] & 0xFF);
    }

    @Test
    @DisplayName("Should handle Unicode negotiation flag")
    void testUnicodeNegotiation() {
        // Given

		// data bytes and treat the value as an unsigned number.
		var inv byte // 0x00 if positive or zero, 0xff if negative
		if b[0]&0x40 != 0 {
			inv = 0xff
		}

		var x uint64
		for i, c := range b {
			c ^= inv // Inverts c only if inv is 0xff, otherwise does nothing
			if i == 0 {
				c &= 0x7f // Ignore signal bit in first byte
			}
			if (x >> 56) > 0 {

    void testEncode() {
        byte[] testBytes = new byte[] { 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, (byte) 0x88, (byte) 0x99, (byte) 0xAA, (byte) 0xBB,
                (byte) 0xCC, (byte) 0xDD, (byte) 0xEE, (byte) 0xFF, 0x00 };

        Smb2LeaseKey key = new Smb2LeaseKey(testBytes);
        byte[] buffer = new byte[20];

        key.encode(buffer, 2);

        for (int i = 0; i < 16; i++) {

    public void testSupportedHashAlgorithms() {
        assertTrue(preauthService.isHashAlgorithmSupported(PreauthIntegrityService.HASH_ALGO_SHA512));
        assertFalse(preauthService.isHashAlgorithmSupported(0xFF)); // Unsupported

        int[] supported = preauthService.getSupportedHashAlgorithms();
        assertNotNull(supported);
        assertEquals(1, supported.length);

        assertEquals(0, response.getCommand());

        // Verify we can change the subcommand
        response.setSubCommand((byte) 0xFF);
        assertEquals((byte) 0xFF, response.getSubCommand());

        // But creating a new instance should have the correct subcommand
        Trans2SetFileInformationResponse newResponse = new Trans2SetFileInformationResponse(config);

        // entities. Use A as a temp var.
        for (int i = 0; i < 16; i++) {
            X[i] = block[offset++] & 0xFF | (block[offset++] & 0xFF) << 8 | (block[offset++] & 0xFF) << 16 | (block[offset++] & 0xFF) << 24;
        }

        int A = context[0];
        int B = context[1];
        int C = context[2];
        int D = context[3];

        }

        @ParameterizedTest
        @DisplayName("Should read different oplock levels correctly")
        @ValueSource(bytes = { 0x00, 0x01, 0x02, 0x08, (byte) 0xFF })
        void testReadDifferentOplockLevels(byte oplockLevel) throws Exception {
            byte[] buffer = createValidOplockBreakBuffer(oplockLevel, createTestData(16));

        dialectIndex = readInt2(buffer, bufferIndex);
        bufferIndex += 2;
        if (dialectIndex > 10) {
            return bufferIndex - start;
        }
        server.securityMode = buffer[bufferIndex] & 0xFF;
        bufferIndex++;
        server.security = server.securityMode & 0x01;
        server.encryptedPasswords = (server.securityMode & 0x02) == 0x02;
        server.signaturesEnabled = (server.securityMode & 0x04) == 0x04;

            baos.write(content.length);
        } else {
            baos.write(0x82); // length of length = 2
            baos.write((content.length >> 8) & 0xFF);
            baos.write(content.length & 0xFF);
        }

        baos.write(content);
        return baos.toByteArray();
    }

		{string([]byte{0xff, 0xfe, 0xfd}), true},
		{`foo\bar`, true},
		{"Hello/世界", false},
	}

	for i, testCase := range testCases {
		err := ValidateFilterRuleValue(testCase.value)
		expectErr := (err != nil)