private final boolean smb2;
    private final int dialect;

    /**
     *
     */
    DialectVersion() {
        this.smb2 = false;
        this.dialect = -1;
    }

    DialectVersion(final int dialectId) {
        this.smb2 = true;
        this.dialect = dialectId;
    }

    /**
     * Check if this is an SMB2 dialect version
     *
     * @return the smb2
     */

    }

    @Test
    @DisplayName("Test all dialect versions")
    void testAllDialectVersions() {
        // Test each dialect version
        DialectVersion[] dialects = { DialectVersion.SMB1, DialectVersion.SMB202, DialectVersion.SMB210, DialectVersion.SMB300,
                DialectVersion.SMB302, DialectVersion.SMB311 };

        for (DialectVersion dialect : dialects) {

            assertThrows(SmbUnsupportedOperationException.class, () -> transport.calculatePreauthHash(new byte[] { 1 }, 0, 1, null));
        }

        @Test
        @DisplayName("calculatePreauthHash rejects dialects before SMB 3.1.1")
        void preauthHash_rejectsOldDialect() {
            setField(transport, "smb2", true);
            Smb2NegotiateResponse nego = new Smb2NegotiateResponse(cfg);
            // selectedDialect: SMB300

        @DisplayName("Should throw exception for invalid dialects")
        void testConstructorInvalidDialects(int dialect) {
            IllegalArgumentException exception =
                    assertThrows(IllegalArgumentException.class, () -> new Smb2SigningDigest(sessionKey, dialect, null));
            assertEquals("Unknown dialect", exception.getMessage());
        }
    }

    @Nested

     */
    public int getSecurityMode() {
        return this.securityMode;
    }

    /**
     * Gets the negotiated SMB dialect
     *
     * @return the SMB dialect negotiated with the server
     */
    public int getDialect() {
        return this.dialect;
    }

    /**
     * {@inheritDoc}
     *
     * @see jcifs.Decodable#decode(byte[], int, int)
     */
    @Override

     *            negotiated cipher identifier
     * @param dialect
     *            SMB dialect version
     * @param encryptionKey
     *            key for client->server encryption
     * @param decryptionKey
     *            key for server->client decryption
     */
    public Smb2EncryptionContext(final int cipherId, final DialectVersion dialect, final byte[] encryptionKey, final byte[] decryptionKey) {

        // Set security mode (2 bytes)
        int testSecurityMode = 0x0003;
        SMBUtil.writeInt2(testSecurityMode, buffer, bufferIndex + 20);

        // Set dialect (2 bytes)
        int testDialect = 0x0311;
        SMBUtil.writeInt2(testDialect, buffer, bufferIndex + 22);

        // Execute decode
        int bytesDecoded = response.decode(buffer, bufferIndex, 24);

    /**
     * SMB 2.0.2 dialect (Windows Vista/Server 2008)
     */
    public static final int SMB2_DIALECT_0202 = 0x0202;

    /**
     * SMB 2.1 dialect (Windows 7/Server 2008R2)
     */
    public static final int SMB2_DIALECT_0210 = 0x0210;

    /**
     * SMB 3.0 dialect (Windows 8/Server 2012)
     */
    public static final int SMB2_DIALECT_0300 = 0x0300;

    private volatile boolean closed = false;

    /**
     * Constructs a SMB2 signing digest with the specified session key and dialect
     *
     * @param sessionKey
     *            the session key for signing
     * @param dialect
     *            the SMB2 dialect version
     * @param preauthIntegrityHash
     *            the pre-authentication integrity hash (for SMB 3.1.1)
     * @throws GeneralSecurityException

                assertTrue(dialectCodes.add(dialect), "Dialect code should be unique for " + version);
            }
        }

        // Should have 5 unique dialect codes for SMB2+ versions
        assertEquals(5, dialectCodes.size());
    }