// Testing invalid protocol ID during decode instead
        byte[] invalidBuffer = new byte[52];
        // Write invalid protocol ID
        invalidBuffer[0] = 0x00;
        invalidBuffer[1] = 0x00;
        invalidBuffer[2] = 0x00;
        invalidBuffer[3] = 0x00;

        assertThrows(IllegalArgumentException.class, () -> {
            Smb2TransformHeader.decode(invalidBuffer, 0);
        });
    }

    @Test

     */
    public static final int DFS_VOLUME_FLAVOR_STANDALONE = 0x100;
    /**
     * DFS volume flavor indicating Active Directory blob storage
     */
    public static final int DFS_VOLUME_FLAVOR_AD_BLOB = 0x200;
    /**
     * DFS storage state indicating offline status
     */
    public static final int DFS_STORAGE_STATE_OFFLINE = 0x0001;
    /**
     * DFS storage state indicating online status
     */

        assertTrue(s.contains(",informationLevel=0x104"), "toString should include information level 0x104");
        assertTrue(s.contains(",resumeKey=0x0304"), "toString should include lower 16-bit resumeKey hex");
        assertTrue(s.contains(",flags=0x00"), "toString should include flags in hex");
        assertTrue(s.endsWith("]"), "toString should end with closing bracket");

     */
    public static final int CIPHER_AES_256_CCM = 0x0003;
    /**
     * AES-256-GCM cipher identifier for SMB3.1.1 encryption (future support)
     */
    public static final int CIPHER_AES_256_GCM = 0x0004;

    /**
     * Transform header flag indicating the message is encrypted
     */
    public static final int TRANSFORM_FLAG_ENCRYPTED = 0x0001;

    /**
     * Create encryption context
     *

        assertEquals(0x40, Smb2CreateRequest.FILE_NON_DIRECTORY_FILE);
        assertEquals(0x100, Smb2CreateRequest.FILE_COMPLETE_IF_OPLOCKED);
        assertEquals(0x200, Smb2CreateRequest.FILE_NO_EA_KNOWLEDGE);
        assertEquals(0x400, Smb2CreateRequest.FILE_OPEN_REMOTE_INSTANCE);
        assertEquals(0x800, Smb2CreateRequest.FILE_RANDOM_ACCESS);
        assertEquals(0x1000, Smb2CreateRequest.FILE_DELETE_ON_CLOSE);

            getResultMessageMethod.setAccessible(true);

            assertEquals("0x0004", getResultMessageMethod.invoke(null, 4), "Should return hex format for unknown code 4");
            assertEquals("0x00FF", getResultMessageMethod.invoke(null, 255), "Should return hex format for unknown code 255");
            assertEquals("0x1000", getResultMessageMethod.invoke(null, 4096), "Should return hex format for large unknown code");
        }

            testGuid[i] = (byte) (i + 1);
        }
        System.arraycopy(testGuid, 0, buffer, bufferIndex + 4, 16);

        // 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);

                // For domain: Type 0x0002 (NetBIOS Domain Name)
                // For server: Type 0x0001 (NetBIOS Computer Name)

                // Verify domain part
                assertEquals(2, Type2Message.readUShort(targetInfo, 0)); // Type 0x0002

        buffer[offset + 3] = 0x00;
        buffer[offset + 4] = 0x00;
        buffer[offset + 5] = 0x00;
        buffer[offset + 6] = 0x00;
        buffer[offset + 7] = 0x01;
        // Sub-authority
        SMBUtil.writeInt4(0, buffer, offset + 8);
    }

    private void prepareDaclHeader(byte[] buffer, int offset, int aceCount) {
        buffer[offset] = 0x02; // revision
        buffer[offset + 1] = 0x00; // padding

    /**
     * Access to the file is random
     */
    public static final int FILE_RANDOM_ACCESS = 0x800;
    /**
     * Delete the file when the last handle to it is closed
     */
    public static final int FILE_DELETE_ON_CLOSE = 0x1000;
    /**
     * Open file by its file ID
     */
    public static final int FILE_OPEN_BY_FILE_ID = 0x2000;
    /**