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sys: IRP_MJ_CREATE

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This commit is contained in:
Bill Zissimopoulos
2015-12-03 20:18:21 -08:00
parent eb07db1d29
commit b0066b81ac
3 changed files with 41 additions and 16 deletions
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32
src/sys/create.c
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@ -60,7 +60,8 @@ static NTSTATUS FspFsvolCreate(
KPROCESSOR_MODE RequestorMode = FlagOn(Flags, SL_FORCE_ACCESS_CHECK) ? UserMode : Irp->RequestorMode;
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
ACCESS_MASK DesiredAccess = IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
//PSECURITY_DESCRIPTOR SecurityDescriptor = AccessState->SecurityDescriptor;
PSECURITY_DESCRIPTOR SecurityDescriptor = AccessState->SecurityDescriptor;
ULONG SecurityDescriptorSize = 0;
USHORT ShareAccess = IrpSp->Parameters.Create.ShareAccess;
ULONG CreateDisposition = (IrpSp->Parameters.Create.Options >> 24) & 0xff;
ULONG CreateOptions = IrpSp->Parameters.Create.Options & 0xffffff;
@ -68,6 +69,8 @@ static NTSTATUS FspFsvolCreate(
LARGE_INTEGER AllocationSize = Irp->Overlay.AllocationSize;
PFILE_FULL_EA_INFORMATION EaBuffer = Irp->AssociatedIrp.SystemBuffer;
//ULONG EaLength = IrpSp->Parameters.Create.EaLength;
BOOLEAN IsAbsoluteSecurityDescriptor = FALSE;
BOOLEAN IsSelfRelativeSecurityDescriptor = FALSE;
BOOLEAN HasTraversePrivilege = BooleanFlagOn(AccessState->Flags, TOKEN_HAS_TRAVERSE_PRIVILEGE);
BOOLEAN HasTrailingBackslash = FALSE;
FSP_FILE_CONTEXT *FsContext = 0;
@ -89,6 +92,26 @@ static NTSTATUS FspFsvolCreate(
if (0 != EaBuffer && !FsvrtDeviceExtension->VolumeParams.EaSupported)
return STATUS_EAS_NOT_SUPPORTED;
/* check security descriptor validity */
if (0 != SecurityDescriptor)
{
IsAbsoluteSecurityDescriptor = RtlValidSecurityDescriptor(SecurityDescriptor);
if (IsAbsoluteSecurityDescriptor)
{
Result = RtlAbsoluteToSelfRelativeSD(SecurityDescriptor, 0, &SecurityDescriptorSize);
if (STATUS_BUFFER_TOO_SMALL != Result)
return STATUS_INVALID_PARAMETER;
}
else
{
SecurityDescriptorSize = RtlLengthSecurityDescriptor(SecurityDescriptor);
IsSelfRelativeSecurityDescriptor = RtlValidRelativeSecurityDescriptor(
SecurityDescriptor, SecurityDescriptorSize, 0);
if (!IsSelfRelativeSecurityDescriptor)
return STATUS_INVALID_PARAMETER;
}
}
/* according to fastfat, filenames that begin with two backslashes are ok */
if (sizeof(WCHAR) * 2 <= FileName.Length &&
L'\\' == FileName.Buffer[1] && L'\\' == FileName.Buffer[0])
@ -167,7 +190,7 @@ static NTSTATUS FspFsvolCreate(
*/
/* create the user-mode file system request */
Result = FspIopCreateRequest(Irp, &FsContext->FileName, 0, &Request);
Result = FspIopCreateRequest(Irp, &FsContext->FileName, SecurityDescriptorSize, &Request);
if (!NT_SUCCESS(Result))
{
FspFileContextDelete(FsContext);
@ -179,8 +202,9 @@ static NTSTATUS FspFsvolCreate(
Request->Req.Create.CreateDisposition = CreateDisposition;
Request->Req.Create.CreateOptions = CreateOptions;
Request->Req.Create.FileAttributes = FileAttributes;
Request->Req.Create.SecurityDescriptor = 0;
Request->Req.Create.SecurityDescriptorSize = 0;
Request->Req.Create.SecurityDescriptor = 0 == SecurityDescriptor ? 0 :
FSP_FSCTL_DEFAULT_ALIGN_UP(FsContext->FileName.Length + sizeof(WCHAR));
Request->Req.Create.SecurityDescriptorSize = (UINT16)SecurityDescriptorSize;
Request->Req.Create.AllocationSize = AllocationSize.QuadPart;
Request->Req.Create.AccessToken = 0;
Request->Req.Create.DesiredAccess = DesiredAccess;

8
src/sys/iop.c
View File

@ -20,20 +20,22 @@ NTSTATUS FspIopCreateRequest(
{
PAGED_CODE();
FSP_FSCTL_TRANSACT_REQ *Request;
*PRequest = 0;
if (0 != FileName)
ExtraSize += FileName->Length + sizeof(WCHAR);
ExtraSize += FSP_FSCTL_DEFAULT_ALIGN_UP(FileName->Length + sizeof(WCHAR));
if (FSP_FSCTL_TRANSACT_REQ_SIZEMAX < sizeof *Request + ExtraSize)
return STATUS_INVALID_PARAMETER;
FSP_FSCTL_TRANSACT_REQ *Request = ExAllocatePoolWithTag(PagedPool,
Request = ExAllocatePoolWithTag(PagedPool,
sizeof *Request + ExtraSize, FSP_TAG);
if (0 == Request)
return STATUS_INSUFFICIENT_RESOURCES;
RtlZeroMemory(Request, sizeof *Request);
RtlZeroMemory(Request, sizeof *Request + ExtraSize);
Request->Size = (UINT16)(sizeof *Request + ExtraSize);
Request->Hint = (UINT_PTR)Irp;
if (0 != FileName)