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sys: implement named stream open/close and related delete/share access issues

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This commit is contained in:
Bill Zissimopoulos
2016-09-27 14:53:59 -07:00
parent 2ba46fdb71
commit 495fc7a5dc
7 changed files with 274 additions and 15 deletions
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58
src/sys/create.c
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@ -134,7 +134,6 @@ static NTSTATUS FspFsvolCreateNoLock(
PFILE_OBJECT FileObject = IrpSp->FileObject;
PFILE_OBJECT RelatedFileObject = FileObject->RelatedFileObject;
UNICODE_STRING FileName = FileObject->FileName;
UNICODE_STRING MainStreamName = { 0 }, StreamPart = { 0 };
/* open the volume object? */
if ((0 == RelatedFileObject || !FspFileNodeIsValid(RelatedFileObject->FsContext)) &&
@ -148,6 +147,7 @@ static NTSTATUS FspFsvolCreateNoLock(
return STATUS_SUCCESS;
}
UNICODE_STRING MainStreamName = { 0 }, StreamPart = { 0 };
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
ULONG CreateDisposition = (IrpSp->Parameters.Create.Options >> 24) & 0xff;
ULONG CreateOptions = IrpSp->Parameters.Create.Options;
@ -163,6 +163,10 @@ static NTSTATUS FspFsvolCreateNoLock(
ULONG Flags = IrpSp->Flags;
KPROCESSOR_MODE RequestorMode =
FlagOn(Flags, SL_FORCE_ACCESS_CHECK) ? UserMode : Irp->RequestorMode;
BOOLEAN CaseSensitiveRequested =
BooleanFlagOn(Flags, SL_CASE_SENSITIVE);
BOOLEAN CaseSensitive =
CaseSensitiveRequested || FsvolDeviceExtension->VolumeParams.CaseSensitiveSearch;
BOOLEAN HasTraversePrivilege =
BooleanFlagOn(AccessState->Flags, TOKEN_HAS_TRAVERSE_PRIVILEGE);
FSP_FILE_NODE *FileNode, *RelatedFileNode;
@ -347,6 +351,52 @@ static NTSTATUS FspFsvolCreateNoLock(
return Result;
}
/* if we have a non-empty stream part, open the main stream */
if (0 != StreamPart.Buffer)
{
Result = FspMainStreamOpen(FsvolDeviceObject,
&MainStreamName, CaseSensitive,
CreateDisposition,
&FileDesc->MainStreamHandle,
&FileDesc->MainStreamObject);
if (!NT_SUCCESS(Result))
goto main_stream_exit;
/* check that the main stream is one we recognize */
if (!FspFileNodeIsValid(FileDesc->MainStreamObject->FsContext))
{
Result = STATUS_OBJECT_NAME_NOT_FOUND;
goto main_stream_exit;
}
/* named streams can never be directories (even when attached to directories) */
if (FlagOn(CreateOptions, FILE_DIRECTORY_FILE))
{
Result = STATUS_NOT_A_DIRECTORY;
goto main_stream_exit;
}
/* cannot open target directory of a named stream */
if (FlagOn(Flags, SL_OPEN_TARGET_DIRECTORY))
{
Result = STATUS_OBJECT_NAME_INVALID;
goto main_stream_exit;
}
/* remember the the main stream node */
FileNode->MainStreamFileNode = FileDesc->MainStreamObject->FsContext;
Result = STATUS_SUCCESS;
main_stream_exit:
if (!NT_SUCCESS(Result))
{
FspFileDescDelete(FileDesc);
FspFileNodeDereference(FileNode);
return Result;
}
}
/* create the user-mode file system request */
Result = FspIopCreateRequestEx(Irp, &FileNode->FileName, SecurityDescriptorSize,
FspFsvolCreateRequestFini, &Request);
@ -369,9 +419,7 @@ static NTSTATUS FspFsvolCreateNoLock(
* delete the Request and any associated resources.
*/
FileDesc->FileNode = FileNode;
FileDesc->CaseSensitive =
0 != FsvolDeviceExtension->VolumeParams.CaseSensitiveSearch ||
BooleanFlagOn(Flags, SL_CASE_SENSITIVE);
FileDesc->CaseSensitive = CaseSensitive;
FileDesc->HasTraversePrivilege = HasTraversePrivilege;
FspFsvolDeviceFileRenameSetOwner(FsvolDeviceObject, Request);
FspIopRequestContext(Request, RequestDeviceObject) = FsvolDeviceObject;
@ -393,7 +441,7 @@ static NTSTATUS FspFsvolCreateNoLock(
Request->Req.Create.UserMode = UserMode == RequestorMode;
Request->Req.Create.HasTraversePrivilege = HasTraversePrivilege;
Request->Req.Create.OpenTargetDirectory = BooleanFlagOn(Flags, SL_OPEN_TARGET_DIRECTORY);
Request->Req.Create.CaseSensitive = BooleanFlagOn(Flags, SL_CASE_SENSITIVE);
Request->Req.Create.CaseSensitive = CaseSensitiveRequested;
/* copy the security descriptor (if any) into the request */
if (0 != SecurityDescriptorSize)