/// <summary>
/// Get a reparse buffer from a byte array.
/// </summary>
/// <param name="ba">The byte array to parse</param>
/// <returns>The reparse buffer.</returns>
public static ReparseBuffer FromByteArray(byte[] ba)
{
BinaryReader reader = new BinaryReader(new MemoryStream(ba), Encoding.Unicode);
ReparseTag tag = (ReparseTag)reader.ReadUInt32();
int data_length = reader.ReadUInt16();
// Reserved
reader.ReadUInt16();
ReparseBuffer buffer = null;
long remaining_length = reader.RemainingLength();
long expected_length = data_length;
if (!NtFileUtils.IsReparseTagMicrosoft(tag))
{
expected_length += 16;
}
if (remaining_length != expected_length)
{
// Corrupted buffer. Return an opaque buffer with all the data until the end.
return(new OpaqueReparseBuffer(tag, reader.ReadToEnd()));
}
switch (tag)
{
case ReparseTag.MOUNT_POINT:
buffer = new MountPointReparseBuffer();
break;
case ReparseTag.SYMLINK:
buffer = new SymlinkReparseBuffer(false);
break;
case ReparseTag.GLOBAL_REPARSE:
buffer = new SymlinkReparseBuffer(true);
break;
case ReparseTag.APPEXECLINK:
buffer = new ExecutionAliasReparseBuffer();
break;
default:
if (NtFileUtils.IsReparseTagMicrosoft(tag))
{
buffer = new OpaqueReparseBuffer(tag);
}
else
{
buffer = new GenericReparseBuffer(tag);
}
break;
}
buffer.ParseBuffer(data_length, reader);
return(buffer);
}
public static ReparseBuffer FromByteArray(byte[] ba, bool opaque_buffer)
{
BinaryReader reader = new BinaryReader(new MemoryStream(ba), Encoding.Unicode);
ReparseTag tag = (ReparseTag)reader.ReadUInt32();
int data_length = reader.ReadUInt16();
// Reserved
reader.ReadUInt16();
ReparseBuffer buffer = null;
if (data_length != reader.RemainingLength())
{
// Possibly corrupted. Return an opaque buffer with all the data until the end.
return(new OpaqueReparseBuffer(tag, reader.ReadToEnd()));
}
switch (tag)
{
case ReparseTag.MOUNT_POINT:
buffer = new MountPointReparseBuffer();
break;
case ReparseTag.SYMLINK:
buffer = new SymlinkReparseBuffer(false);
break;
case ReparseTag.GLOBAL_REPARSE:
buffer = new SymlinkReparseBuffer(true);
break;
case ReparseTag.APPEXECLINK:
buffer = new ExecutionAliasReparseBuffer();
break;
case ReparseTag.AF_UNIX:
buffer = new OpaqueReparseBuffer(ReparseTag.AF_UNIX);
break;
default:
if (opaque_buffer || reader.RemainingLength() < 16)
{
buffer = new OpaqueReparseBuffer(tag);
}
else
{
buffer = new GenericReparseBuffer(tag);
}
break;
}
buffer.ParseBuffer(data_length, reader);
return(buffer);
}
/// <summary>
/// Get a reparse buffer from a byte array.
/// </summary>
/// <param name="ba">The byte array to parse</param>
/// <param name="opaque_buffer">True to return an opaque buffer if
/// the tag isn't known, otherwise try and parse as a generic buffer</param>
/// <returns>The reparse buffer.</returns>
public static ReparseBuffer FromByteArray(byte[] ba, bool opaque_buffer)
{
BinaryReader reader = new BinaryReader(new MemoryStream(ba), Encoding.Unicode);
ReparseTag tag = (ReparseTag)reader.ReadUInt32();
int data_length = reader.ReadUInt16();
// Reserved
reader.ReadUInt16();
ReparseBuffer buffer = null;
switch (tag)
{
case ReparseTag.MOUNT_POINT:
buffer = new MountPointReparseBuffer();
break;
case ReparseTag.SYMLINK:
buffer = new SymlinkReparseBuffer(false);
break;
case ReparseTag.GLOBAL_REPARSE:
buffer = new SymlinkReparseBuffer(true);
break;
case ReparseTag.APPEXECLINK:
buffer = new ExecutionAliasReparseBuffer();
break;
case ReparseTag.AFUNIX:
buffer = new OpaqueReparseBuffer(ReparseTag.AFUNIX);
break;
default:
if (opaque_buffer)
{
buffer = new OpaqueReparseBuffer(tag);
}
else
{
buffer = new GenericReparseBuffer(tag);
}
break;
}
buffer.ParseBuffer(data_length, reader);
return(buffer);
}
internal NtFileReparsePoint(NtFile volume, FileReparsePointInformation info)
{
FileReferenceNumber = info.FileReferenceNumber;
Buffer = new OpaqueReparseBuffer(info.Tag, new byte[0]);
FullPath = string.Empty;
Win32Path = string.Empty;
using (var file = NtFile.OpenFileById(volume, info.FileReferenceNumber, FileAccessRights.ReadAttributes,
FileShareMode.None, FileOpenOptions.OpenReparsePoint | FileOpenOptions.OpenForBackupIntent, false))
{
if (!file.IsSuccess)
{
return;
}
FileAttributes = file.Result.FileAttributes;
FullPath = file.Result.FullPath;
Win32Path = file.Result.GetWin32PathName(0, false).GetResultOrDefault(string.Empty);
Buffer = file.Result.GetReparsePoint(false).GetResultOrDefault(Buffer);
}
}
