Implement FileAttributeTagInformation support for SMB file operations

SMBLibrary/NTFileStore/Structures/FileInformation/FileInformation.cs

@@ -82,7 +82,7 @@ namespace SMBLibrary
                 case FileInformationClass.FileNetworkOpenInformation:
                     return new FileNetworkOpenInformation(buffer, offset);
                 case FileInformationClass.FileAttributeTagInformation:
-                    throw new NotImplementedException();
+                    return new FileAttributeTagInformation(buffer, offset);
                 case FileInformationClass.FileValidDataLengthInformation:
                     return new FileValidDataLengthInformation(buffer, offset);
                 case FileInformationClass.FileShortNameInformation:

SMBLibrary/NTFileStore/Structures/FileInformation/Query/FileAttributeTagInformation.cs

@@ -0,0 +1,55 @@
+/* Copyright (C) 2017 Tal Aloni <tal.aloni.il@gmail.com>. All rights reserved.
+ * 
+ * You can redistribute this program and/or modify it under the terms of
+ * the GNU Lesser Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ */
+using System;
+using System.Collections.Generic;
+using Utilities;
+
+namespace SMBLibrary
+{
+    /// <summary>
+    /// [MS-FSCC] 2.4.6 - FileAttributeTagInformation
+    /// </summary>
+    public class FileAttributeTagInformation : FileInformation
+    {
+        public const int FixedLength = 8;
+
+        public FileAttributes FileAttributes;
+        public uint ReparsePointTag;
+
+        public FileAttributeTagInformation()
+        {
+        }
+
+        public FileAttributeTagInformation(byte[] buffer, int offset)
+        {
+            FileAttributes = (FileAttributes)LittleEndianConverter.ToUInt32(buffer, offset + 0);
+            ReparsePointTag = LittleEndianConverter.ToUInt32(buffer, offset + 4);
+        }
+
+        public override void WriteBytes(byte[] buffer, int offset)
+        {
+            LittleEndianWriter.WriteUInt32(buffer, offset + 0, (uint)FileAttributes);
+            LittleEndianWriter.WriteUInt32(buffer, offset + 4, ReparsePointTag);
+        }
+
+        public override FileInformationClass FileInformationClass
+        {
+            get
+            {
+                return FileInformationClass.FileAttributeTagInformation;
+            }
+        }
+
+        public override int Length
+        {
+            get
+            {
+                return FixedLength;
+            }
+        }
+    }
+}