Ejemplo n.º 1
0
        internal static CFDirectoryEntry ReadDirectoryEntry(Stream s, long streamOffset, bool isVersion3)
        {
            byte[] data = ReadFragment(s, streamOffset, DirectoryEntrySize);

            CFDirectoryEntry entry = new CFDirectoryEntry();
            entry.NameLength = BitConverter.ToUInt16(data, 64);
            int nameLength = Math.Min(32, (int)entry.NameLength / 2);
            entry.Name = new char[nameLength];
            for (int i = 0; i < nameLength; i++)
            {
                entry.Name[i] = (char)BitConverter.ToChar(data, 2 * i);
            }
            entry.ObjectType = data[66];
            entry.ColorFlag = data[67];
            entry.LeftSiblingID = BitConverter.ToUInt32(data, 68);
            entry.RightSiblingID = BitConverter.ToUInt32(data, 72);
            entry.ChildID = BitConverter.ToUInt32(data, 76);
            entry.CLSID = new Guid(GetByteArrayPortion(data, 80, 16)); ;
            entry.StateBits = BitConverter.ToUInt32(data, 96);
            entry.CreationTime = BitConverter.ToUInt64(data, 100);
            entry.ModifiedTime = BitConverter.ToUInt64(data, 108);
            entry.StartingSectorLocation = BitConverter.ToUInt32(data, 116);
            entry.StreamSize = BitConverter.ToUInt64(data, 120);

            if (isVersion3)
                entry.StreamSize &= 0xFFFFFFFF;

            return entry;
        }
Ejemplo n.º 2
0
 private void Initialize()
 {
     entry = ReaderUtils.ReadDirectoryEntry(System.BaseStream,
         GetStreamOffset(), System.IsVersion3);
     ReaderUtils.ValidateDirectoryEntry(entry);
 }
Ejemplo n.º 3
0
        internal static void ValidateDirectoryEntry(CFDirectoryEntry entry)
        {
            if(entry.Name.Length * 2 != entry.NameLength || entry.NameLength == 0)
                throw new CompoundFileException("Invalid directory entry: name length");
            if(entry.Name[entry.Name.Length - 1] != 0)
                throw new CompoundFileException("Invalid directory entry: name null termination");

            foreach (char ch in entry.Name)
            {
                if(ch == '/' || ch == '\\' || ch == ':' || ch == '!')
                    throw new CompoundFileException("Invalid directory entry: illegal char in name");
            }
            if (entry.ObjectType != DirectoryObjectTypes.Unknown && entry.ObjectType != DirectoryObjectTypes.Storage &&
                entry.ObjectType != DirectoryObjectTypes.Stream && entry.ObjectType != DirectoryObjectTypes.RootStorage)
                throw new CompoundFileException("Invalid directory entry: object type");

            if(entry.ColorFlag != TreeColors.Red && entry.ColorFlag != TreeColors.Black)
                throw new CompoundFileException("Invalid directory entry: color flag");

            if(entry.LeftSiblingID > DirectoryStreamIds.MAXREGSID && entry.LeftSiblingID != DirectoryStreamIds.NOSTREAM)
                throw new CompoundFileException("Invalid directory entry: left sibling");
            if (entry.RightSiblingID > DirectoryStreamIds.MAXREGSID && entry.RightSiblingID != DirectoryStreamIds.NOSTREAM)
                throw new CompoundFileException("Invalid directory entry: right sibling");
            if (entry.ChildID > DirectoryStreamIds.MAXREGSID && entry.ChildID != DirectoryStreamIds.NOSTREAM)
                throw new CompoundFileException("Invalid directory entry: child");
        }