public static byte[] PerformRead(SMBHeader header, object share, ushort FID, long offset, int maxCount, StateObject state)
{
OpenedFileObject openedFile = state.GetOpenedFileObject(FID);
if (openedFile == null)
{
header.Status = NTStatus.STATUS_INVALID_HANDLE;
return(null);
}
string openedFilePath = openedFile.Path;
if (share is NamedPipeShare)
{
return(state.RetrieveNamedPipeReply(FID));
}
else // FileSystemShare
{
FileSystemShare fileSystemShare = (FileSystemShare)share;
IFileSystem fileSystem = fileSystemShare.FileSystem;
if (openedFile.IsSequentialAccess)
{
bool isInCache = (offset >= openedFile.CacheOffset) && (offset + maxCount <= openedFile.CacheOffset + openedFile.Cache.Length);
if (!isInCache)
{
int bytesRead;
try
{
Stream stream = fileSystem.OpenFile(openedFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
stream.Seek(offset, SeekOrigin.Begin);
openedFile.CacheOffset = offset;
openedFile.Cache = new byte[OpenedFileObject.CacheSize];
bytesRead = stream.Read(openedFile.Cache, 0, OpenedFileObject.CacheSize);
stream.Close();
}
catch (IOException ex)
{
ushort errorCode = IOExceptionHelper.GetWin32ErrorCode(ex);
if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
{
// Returning STATUS_SHARING_VIOLATION is undocumented but apparently valid
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
return(null);
}
else
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(null);
}
}
catch (UnauthorizedAccessException)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(null);
}
if (bytesRead < OpenedFileObject.CacheSize)
{
// EOF, we must trim the response data array
byte[] buffer = new byte[bytesRead];
Array.Copy(openedFile.Cache, 0, buffer, 0, bytesRead);
openedFile.Cache = buffer;
}
}
int offsetInCache = (int)(offset - openedFile.CacheOffset);
int bytesRemained = openedFile.Cache.Length - offsetInCache;
int dataLength = Math.Min(maxCount, bytesRemained);
byte[] data = new byte[dataLength];
Array.Copy(openedFile.Cache, offsetInCache, data, 0, dataLength);
return(data);
}
else
{
int bytesRead;
byte[] data;
try
{
Stream stream = fileSystem.OpenFile(openedFilePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite);
stream.Seek(offset, SeekOrigin.Begin);
data = new byte[maxCount];
bytesRead = stream.Read(data, 0, maxCount);
stream.Close();
}
catch (IOException ex)
{
ushort errorCode = IOExceptionHelper.GetWin32ErrorCode(ex);
if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
{
// Returning STATUS_SHARING_VIOLATION is undocumented but apparently valid
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
return(null);
}
else
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(null);
}
}
catch (ArgumentOutOfRangeException)
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(null);
}
catch (UnauthorizedAccessException)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(null);
}
if (bytesRead < maxCount)
{
// EOF, we must trim the response data array
byte[] buffer = new byte[bytesRead];
Array.Copy(data, 0, buffer, 0, bytesRead);
data = buffer;
}
return(data);
}
}
}
public static uint PerformWrite(SMBHeader header, object share, ushort FID, ulong offset, byte[] data, StateObject state)
{
OpenedFileObject openedFile = state.GetOpenedFileObject(FID);
if (openedFile == null)
{
header.Status = NTStatus.STATUS_INVALID_HANDLE;
return(0);
}
string openedFilePath = openedFile.Path;
if (share is NamedPipeShare)
{
RemoteService service = ((NamedPipeShare)share).GetService(openedFilePath);
if (service != null)
{
RPCPDU rpcRequest = RPCPDU.GetPDU(data);
RPCPDU rpcReply = RemoteServiceHelper.GetRPCReply(rpcRequest, service);
byte[] replyData = rpcReply.GetBytes();
state.StoreNamedPipeReply(FID, replyData);
return((uint)data.Length);
}
// This code should not execute unless the SMB request (sequence) is invalid
header.Status = NTStatus.STATUS_INVALID_SMB;
return(0);
}
else // FileSystemShare
{
FileSystemShare fileSystemShare = (FileSystemShare)share;
IFileSystem fileSystem = fileSystemShare.FileSystem;
if (openedFile.IsSequentialAccess && openedFile.Cache.Length > 0)
{
openedFile.Cache = new byte[0]; // Empty cache
}
try
{
Stream stream = fileSystem.OpenFile(openedFilePath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
stream.Seek((long)offset, SeekOrigin.Begin);
stream.Write(data, 0, data.Length);
stream.Close();
return((uint)data.Length);
}
catch (IOException ex)
{
ushort errorCode = IOExceptionHelper.GetWin32ErrorCode(ex);
if (errorCode == (ushort)Win32Error.ERROR_DISK_FULL)
{
header.Status = NTStatus.STATUS_DISK_FULL;
return(0);
}
else if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
{
// Returning STATUS_SHARING_VIOLATION is undocumented but apparently valid
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
return(0);
}
else
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(0);
}
}
catch (ArgumentOutOfRangeException)
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(0);
}
catch (UnauthorizedAccessException)
{
// The user may have tried to write to a readonly file
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(0);
}
}
}
internal static SMBCommand GetNTCreateResponse(SMBHeader header, NTCreateAndXRequest request, object share, StateObject state)
{
bool isExtended = (request.Flags & NTCreateFlags.NT_CREATE_REQUEST_EXTENDED_RESPONSE) > 0;
string path = request.FileName;
if (share is NamedPipeShare)
{
RemoteService service = ((NamedPipeShare)share).GetService(path);
if (service != null)
{
ushort fileID = state.AddOpenedFile(path);
if (isExtended)
{
return(CreateResponseExtendedForNamedPipe(fileID));
}
else
{
return(CreateResponseForNamedPipe(fileID));
}
}
header.Status = NTStatus.STATUS_OBJECT_PATH_NOT_FOUND;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
else // FileSystemShare
{
FileSystemShare fileSystemShare = (FileSystemShare)share;
IFileSystem fileSystem = fileSystemShare.FileSystem;
bool forceDirectory = (request.CreateOptions & CreateOptions.FILE_DIRECTORY_FILE) > 0;
bool forceFile = (request.CreateOptions & CreateOptions.FILE_NON_DIRECTORY_FILE) > 0;
if (forceDirectory & (request.CreateDisposition != CreateDisposition.FILE_CREATE &&
request.CreateDisposition != CreateDisposition.FILE_OPEN &&
request.CreateDisposition != CreateDisposition.FILE_OPEN_IF))
{
header.Status = NTStatus.STATUS_INVALID_PARAMETER;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
// Windows will try to access named streams (alternate data streams) regardless of the FILE_NAMED_STREAMS flag, we need to prevent this behaviour.
if (path.Contains(":"))
{
// Windows Server 2003 will return STATUS_OBJECT_NAME_NOT_FOUND
header.Status = NTStatus.STATUS_NO_SUCH_FILE;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
FileSystemEntry entry = fileSystem.GetEntry(path);
if (request.CreateDisposition == CreateDisposition.FILE_OPEN)
{
if (entry == null)
{
header.Status = NTStatus.STATUS_OBJECT_PATH_NOT_FOUND;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
if (entry.IsDirectory && forceFile)
{
header.Status = NTStatus.STATUS_FILE_IS_A_DIRECTORY;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
if (!entry.IsDirectory && forceDirectory)
{
// Not sure if that's the correct response
header.Status = NTStatus.STATUS_OBJECT_NAME_COLLISION;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
}
else if (request.CreateDisposition == CreateDisposition.FILE_CREATE)
{
if (entry != null)
{
// File already exists, fail the request
header.Status = NTStatus.STATUS_OBJECT_NAME_COLLISION;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
string userName = state.GetConnectedUserName(header.UID);
if (!fileSystemShare.HasWriteAccess(userName))
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
try
{
if (forceDirectory)
{
entry = fileSystem.CreateDirectory(path);
}
else
{
entry = fileSystem.CreateFile(path);
}
}
catch (IOException ex)
{
ushort errorCode = IOExceptionHelper.GetWin32ErrorCode(ex);
if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
{
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
else
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
}
catch (UnauthorizedAccessException)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
}
else if (request.CreateDisposition == CreateDisposition.FILE_OPEN_IF ||
request.CreateDisposition == CreateDisposition.FILE_OVERWRITE ||
request.CreateDisposition == CreateDisposition.FILE_OVERWRITE_IF ||
request.CreateDisposition == CreateDisposition.FILE_SUPERSEDE)
{
entry = fileSystem.GetEntry(path);
if (entry == null)
{
if (request.CreateDisposition == CreateDisposition.FILE_OVERWRITE)
{
header.Status = NTStatus.STATUS_OBJECT_PATH_NOT_FOUND;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
string userName = state.GetConnectedUserName(header.UID);
if (!fileSystemShare.HasWriteAccess(userName))
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
try
{
if (forceDirectory)
{
entry = fileSystem.CreateDirectory(path);
}
else
{
entry = fileSystem.CreateFile(path);
}
}
catch (IOException ex)
{
ushort errorCode = IOExceptionHelper.GetWin32ErrorCode(ex);
if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
{
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
else
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
}
catch (UnauthorizedAccessException)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
}
else
{
if (request.CreateDisposition == CreateDisposition.FILE_OVERWRITE ||
request.CreateDisposition == CreateDisposition.FILE_OVERWRITE_IF ||
request.CreateDisposition == CreateDisposition.FILE_SUPERSEDE)
{
string userName = state.GetConnectedUserName(header.UID);
if (!fileSystemShare.HasWriteAccess(userName))
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
// Truncate the file
try
{
Stream stream = fileSystem.OpenFile(path, FileMode.Truncate, FileAccess.ReadWrite, FileShare.ReadWrite);
stream.Close();
}
catch (IOException ex)
{
ushort errorCode = IOExceptionHelper.GetWin32ErrorCode(ex);
if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
{
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
else
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
}
catch (UnauthorizedAccessException)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(CommandName.SMB_COM_NT_CREATE_ANDX));
}
}
}
}
else
{
throw new InvalidRequestException();
}
bool isSequentialAccess = (request.CreateOptions & CreateOptions.FILE_SEQUENTIAL_ONLY) > 0;
ushort fileID = state.AddOpenedFile(path, isSequentialAccess);
if (isExtended)
{
NTCreateAndXResponseExtended response = CreateResponseExtendedFromFileSystemEntry(entry, fileID);
if ((request.Flags & NTCreateFlags.NT_CREATE_REQUEST_OPBATCH) > 0)
{
response.OpLockLevel = OpLockLevel.BatchOpLockGranted;
}
return(response);
}
else
{
NTCreateAndXResponse response = CreateResponseFromFileSystemEntry(entry, fileID);
if ((request.Flags & NTCreateFlags.NT_CREATE_REQUEST_OPBATCH) > 0)
{
response.OpLockLevel = OpLockLevel.BatchOpLockGranted;
}
return(response);
}
}
}
internal static Transaction2SetFileInformationResponse GetSubcommandResponse(SMBHeader header, Transaction2SetFileInformationRequest subcommand, FileSystemShare share, StateObject state)
{
string openedFilePath = state.GetOpenedFilePath(subcommand.FID);
if (openedFilePath == null)
{
header.Status = NTStatus.STATUS_INVALID_HANDLE;
return(null);
}
Transaction2SetFileInformationResponse response = new Transaction2SetFileInformationResponse();
switch (subcommand.InformationLevel)
{
case SetInformationLevel.SMB_INFO_STANDARD:
{
return(response);
}
case SetInformationLevel.SMB_INFO_SET_EAS:
{
throw new NotImplementedException();
}
case SetInformationLevel.SMB_SET_FILE_BASIC_INFO:
{
string userName = state.GetConnectedUserName(header.UID);
if (!share.HasWriteAccess(userName))
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(null);
}
SetFileBasicInfo info = (SetFileBasicInfo)subcommand.SetInfo;
bool isHidden = (info.ExtFileAttributes & ExtendedFileAttributes.Hidden) > 0;
bool isReadonly = (info.ExtFileAttributes & ExtendedFileAttributes.Readonly) > 0;
bool isArchived = (info.ExtFileAttributes & ExtendedFileAttributes.Archive) > 0;
try
{
share.FileSystem.SetAttributes(openedFilePath, isHidden, isReadonly, isArchived);
}
catch (UnauthorizedAccessException)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(null);
}
DateTime?creationTime = null;
DateTime?lastWriteDT = null;
DateTime?lastAccessTime = null;
if (info.CreationTime != SMBHelper.FileTimeNotSpecified)
{
creationTime = info.CreationTime;
}
if (info.LastWriteTime != SMBHelper.FileTimeNotSpecified)
{
lastWriteDT = info.LastWriteTime;
}
if (info.LastAccessTime != SMBHelper.FileTimeNotSpecified)
{
lastAccessTime = info.LastAccessTime;
}
try
{
share.FileSystem.SetDates(openedFilePath, creationTime, lastWriteDT, lastAccessTime);
}
catch (IOException ex)
{
ushort errorCode = IOExceptionHelper.GetWin32ErrorCode(ex);
if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
{
// Returning STATUS_SHARING_VIOLATION is undocumented but apparently valid
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
return(null);
}
else
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(null);
}
}
catch (UnauthorizedAccessException)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(null);
}
return(response);
}
case SetInformationLevel.SMB_SET_FILE_DISPOSITION_INFO:
{
if (((SetFileDispositionInfo)subcommand.SetInfo).DeletePending)
{
// We're supposed to delete the file on close, but it's too late to report errors at this late stage
string userName = state.GetConnectedUserName(header.UID);
if (!share.HasWriteAccess(userName))
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(null);
}
try
{
share.FileSystem.Delete(openedFilePath);
}
catch (IOException)
{
header.Status = NTStatus.STATUS_FILE_LOCK_CONFLICT;
return(null);
}
catch (UnauthorizedAccessException)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(null);
}
}
return(response);
}
case SetInformationLevel.SMB_SET_FILE_ALLOCATION_INFO:
{
// This subcommand is used to set the file length in bytes.
// Note: the input will NOT be a multiple of the cluster size / bytes per sector.
ulong allocationSize = ((SetFileAllocationInfo)subcommand.SetInfo).AllocationSize;
try
{
Stream stream = share.FileSystem.OpenFile(openedFilePath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
stream.SetLength((long)allocationSize);
stream.Close();
}
catch
{
}
return(response);
}
case SetInformationLevel.SMB_SET_FILE_END_OF_FILE_INFO:
{
ulong endOfFile = ((SetFileEndOfFileInfo)subcommand.SetInfo).EndOfFile;
try
{
Stream stream = share.FileSystem.OpenFile(openedFilePath, FileMode.Open, FileAccess.ReadWrite, FileShare.ReadWrite);
stream.SetLength((long)endOfFile);
stream.Close();
}
catch
{
}
return(response);
}
default:
{
throw new InvalidRequestException();
}
}
}
internal static SMBCommand GetOpenAndXResponse(SMBHeader header, OpenAndXRequest request, object share, StateObject state)
{
bool isExtended = (request.Flags & OpenFlags.SMB_OPEN_EXTENDED_RESPONSE) > 0;
string path = request.FileName;
if (share is NamedPipeShare)
{
RemoteService service = ((NamedPipeShare)share).GetService(path);
if (service != null)
{
ushort fileID = state.AddOpenedFile(path);
if (isExtended)
{
return(CreateResponseExtendedForNamedPipe(fileID));
}
else
{
CreateResponseForNamedPipe(fileID);
}
}
header.Status = NTStatus.STATUS_OBJECT_PATH_NOT_FOUND;
return(new ErrorResponse(CommandName.SMB_COM_OPEN_ANDX));
}
else // FileSystemShare
{
FileSystemShare fileSystemShare = (FileSystemShare)share;
string userName = state.GetConnectedUserName(header.UID);
bool hasWriteAccess = fileSystemShare.HasWriteAccess(userName);
IFileSystem fileSystem = fileSystemShare.FileSystem;
OpenResult openResult;
FileSystemEntry entry = fileSystem.GetEntry(path);
if (entry != null)
{
if (!hasWriteAccess && request.AccessMode.AccessMode == AccessMode.Write || request.AccessMode.AccessMode == AccessMode.ReadWrite)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(CommandName.SMB_COM_OPEN_ANDX));
}
if (request.OpenMode.FileExistsOpts == FileExistsOpts.ReturnError)
{
header.Status = NTStatus.STATUS_OBJECT_NAME_COLLISION;
return(new ErrorResponse(CommandName.SMB_COM_OPEN_ANDX));
}
else if (request.OpenMode.FileExistsOpts == FileExistsOpts.TruncateToZero)
{
try
{
Stream stream = fileSystem.OpenFile(path, FileMode.Truncate, FileAccess.ReadWrite, FileShare.ReadWrite);
stream.Close();
}
catch (IOException ex)
{
ushort errorCode = IOExceptionHelper.GetWin32ErrorCode(ex);
if (errorCode == (ushort)Win32Error.ERROR_SHARING_VIOLATION)
{
header.Status = NTStatus.STATUS_SHARING_VIOLATION;
return(new ErrorResponse(CommandName.SMB_COM_OPEN_ANDX));
}
else
{
header.Status = NTStatus.STATUS_DATA_ERROR;
return(new ErrorResponse(CommandName.SMB_COM_OPEN_ANDX));
}
}
catch (UnauthorizedAccessException)
{
header.Status = NTStatus.STATUS_ACCESS_DENIED;
return(new ErrorResponse(CommandName.SMB_COM_OPEN_ANDX));
}
openResult = OpenResult.FileExistedAndWasTruncated;
}
else // FileExistsOpts.Append
{
openResult = OpenResult.FileExistedAndWasOpened;
}
}
else
{
if (request.OpenMode.CreateFile == CreateFile.ReturnErrorIfNotExist)
{
header.Status = NTStatus.STATUS_NO_SUCH_FILE;
return(new ErrorResponse(CommandName.SMB_COM_OPEN_ANDX));
}
entry = fileSystem.CreateFile(path);
openResult = OpenResult.NotExistedAndWasCreated;
}
ushort fileID = state.AddOpenedFile(path, true);
if (isExtended)
{
return(CreateResponseFromFileSystemEntry(entry, fileID, openResult));
}
else
{
return(CreateResponseExtendedFromFileSystemEntry(entry, fileID, openResult));
}
}
}