Windows Driver: Implement querying physical sector size of veraCrypt volume through IOCTL_STORAGE_QUERY_PROPERTY

src/Common/Apidrvr.h

@@ -103,6 +103,7 @@ typedef struct
 	int pkcs5_prf;
 	int ProtectedHidVolPkcs5Prf;
 	BOOL bTrueCryptMode;
+	uint32 BytesPerPhysicalSector;
 } MOUNT_STRUCT;
 
 typedef struct

src/Common/Dlgcode.c

@@ -21,6 +21,7 @@
 #include <sys/stat.h>
 #include <stdlib.h>
 #include <time.h>
+#include <tchar.h>
 
 #include "Resource.h"
 
@@ -6230,6 +6231,48 @@ void BroadcastDeviceChange (WPARAM message, int nDosDriveNo, DWORD driveMap)
 	IgnoreWmDeviceChange = FALSE;
 }
 
+BOOL GetPhysicalDriveAlignment(UINT nDriveNumber, STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR* pDesc)
+{
+	DWORD dwRet = NO_ERROR;
+
+	if (!pDesc)
+		return FALSE;
+
+	// Format physical drive path (may be '\\.\PhysicalDrive0', '\\.\PhysicalDrive1' and so on).
+	TCHAR strDrivePath[512];
+	StringCbPrintf(strDrivePath, sizeof(strDrivePath), _T("\\\\.\\PhysicalDrive%u"), nDriveNumber);
+
+	// Get a handle to physical drive
+	HANDLE hDevice = ::CreateFile(strDrivePath, 0, FILE_SHARE_READ,
+		NULL, OPEN_EXISTING, 0, NULL);
+
+	if(INVALID_HANDLE_VALUE == hDevice)
+		return FALSE;
+
+	// Set the input data structure
+	STORAGE_PROPERTY_QUERY storagePropertyQuery;
+	ZeroMemory(&storagePropertyQuery, sizeof(STORAGE_PROPERTY_QUERY));
+	storagePropertyQuery.PropertyId = StorageAccessAlignmentProperty;
+	storagePropertyQuery.QueryType = PropertyStandardQuery;
+
+	// Get the necessary output buffer size
+	DWORD dwBytesReturned = 0;
+	BOOL bRet = ::DeviceIoControl(hDevice, IOCTL_STORAGE_QUERY_PROPERTY,
+		&storagePropertyQuery, sizeof(STORAGE_PROPERTY_QUERY),
+		pDesc, sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR),
+		&dwBytesReturned, NULL);
+	dwRet = ::GetLastError();
+	::CloseHandle(hDevice);
+
+	if (!bRet)
+	{
+		SetLastError (dwRet);
+		return FALSE;
+	}
+	else
+		return TRUE;
+}
+
 /************************************************************/
 
 // implementation of the generic wait dialog mechanism
@@ -6477,7 +6520,42 @@ retry:
 		{
 			DWORD bps, flags, d;
 			if (GetDiskFreeSpace (root, &d, &bps, &d, &d))
+			{
 				mount.BytesPerSector = bps;
+				mount.BytesPerPhysicalSector = bps;
+			}
+			
+			if (IsOSAtLeast (WIN_VISTA))
+			{
+				if (	(strlen(root) >= 2)
+					&&	(root[1] == ':')
+					&&	(toupper(root[0]) >= 'A' && toupper(root[0]) <= 'Z')
+					)
+				{
+					string drivePath = "\\\\.\\X:";
+					HANDLE dev = INVALID_HANDLE_VALUE;
+					VOLUME_DISK_EXTENTS extents = {0};
+					DWORD dwResult = 0;
+					drivePath[4] = root[0];
+
+					if ((dev = CreateFile (drivePath.c_str(),0, 0, NULL, OPEN_EXISTING, 0, NULL)) != INVALID_HANDLE_VALUE)
+					{
+						if (DeviceIoControl (dev, IOCTL_VOLUME_GET_VOLUME_DISK_EXTENTS, NULL, 0, &extents, sizeof(extents), &dwResult, NULL))
+						{
+							if (extents.NumberOfDiskExtents > 0)
+							{
+								STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR desc;
+								if (GetPhysicalDriveAlignment (extents.Extents[0].DiskNumber, &desc))
+								{
+									mount.BytesPerSector = desc.BytesPerLogicalSector;
+									mount.BytesPerPhysicalSector = desc.BytesPerPhysicalSector;
+								}
+							}
+						}
+						CloseHandle (dev);
+					}
+				}
+			}
 
 			// Read-only host filesystem
 			if (!mount.bMountReadOnly && GetVolumeInformation (root, NULL, 0,  NULL, &d, &flags, NULL, 0))

src/Driver/Ntdriver.c

@@ -120,8 +120,8 @@ NTSTATUS DriverAddDevice (PDRIVER_OBJECT driverObject, PDEVICE_OBJECT pdo)
 
 	if (VolumeClassFilterRegistered && BootArgsValid && BootArgs.HiddenSystemPartitionStart != 0)
 	{
-		PWSTR interfaceLinks;
-		if (NT_SUCCESS (IoGetDeviceInterfaces (&GUID_DEVINTERFACE_VOLUME, pdo, DEVICE_INTERFACE_INCLUDE_NONACTIVE, &interfaceLinks)))
+		PWSTR interfaceLinks = NULL;
+		if (NT_SUCCESS (IoGetDeviceInterfaces (&GUID_DEVINTERFACE_VOLUME, pdo, DEVICE_INTERFACE_INCLUDE_NONACTIVE, &interfaceLinks)) && interfaceLinks)
 		{
 			if (interfaceLinks[0] != UNICODE_NULL)
 			{
@@ -628,6 +628,42 @@ NTSTATUS ProcessVolumeDeviceControlIrp (PDEVICE_OBJECT DeviceObject, PEXTENSION
 		}
 		break;
 
+	case IOCTL_STORAGE_QUERY_PROPERTY:
+		if (ValidateIOBufferSize (Irp, sizeof (STORAGE_PROPERTY_QUERY), ValidateInput))
+		{			
+			PSTORAGE_PROPERTY_QUERY pStoragePropQuery = (PSTORAGE_PROPERTY_QUERY) Irp->AssociatedIrp.SystemBuffer;
+			STORAGE_QUERY_TYPE type = pStoragePropQuery->QueryType;
+
+			if (type == PropertyExistsQuery)
+			{
+				if (pStoragePropQuery->PropertyId == StorageAccessAlignmentProperty)
+				{
+					Irp->IoStatus.Status = STATUS_SUCCESS;
+					Irp->IoStatus.Information = 0;
+				}
+			}
+			else if (type == PropertyStandardQuery)
+			{
+				if (pStoragePropQuery->PropertyId == StorageAccessAlignmentProperty)
+				{
+					if (ValidateIOBufferSize (Irp, sizeof (STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR), ValidateOutput))
+					{
+						PSTORAGE_ACCESS_ALIGNMENT_DESCRIPTOR outputBuffer = (PSTORAGE_ACCESS_ALIGNMENT_DESCRIPTOR) Irp->AssociatedIrp.SystemBuffer;
+
+						outputBuffer->Version = sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR);
+						outputBuffer->Size = sizeof(STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR);
+						outputBuffer->BytesPerLogicalSector = Extension->BytesPerSector;
+						outputBuffer->BytesPerPhysicalSector = Extension->HostBytesPerPhysicalSector;
+						outputBuffer->BytesOffsetForSectorAlignment = Extension->BytesOffsetForSectorAlignment;
+						Irp->IoStatus.Status = STATUS_SUCCESS;
+						Irp->IoStatus.Information = sizeof (STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR);
+					}
+				}
+			}
+		}
+		
+		break;
+
 	case IOCTL_DISK_GET_PARTITION_INFO:
 		if (ValidateIOBufferSize (Irp, sizeof (PARTITION_INFORMATION), ValidateOutput))
 		{

src/Driver/Ntdriver.h

@@ -60,6 +60,8 @@ typedef struct EXTENSION
 	UCHAR PartitionType;		/* Partition info */
 
 	uint32 HostBytesPerSector;
+	uint32 HostBytesPerPhysicalSector;
+	ULONG BytesOffsetForSectorAlignment;
 
 	KEVENT keVolumeEvent;		/* Event structure used when setting up a device */
 

src/Driver/Ntvol.c

@@ -81,6 +81,8 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
 		PARTITION_INFORMATION_EX pix;
 		LARGE_INTEGER diskLengthInfo;
 		DISK_GEOMETRY dg;    
+		STORAGE_PROPERTY_QUERY storagePropertyQuery = {0};
+		STORAGE_ACCESS_ALIGNMENT_DESCRIPTOR storageDescriptor = {0};
 
 		ntStatus = IoGetDeviceObjectPointer (&FullFileName,
 			FILE_READ_DATA | FILE_READ_ATTRIBUTES,
@@ -97,6 +99,21 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
 		lDiskLength.QuadPart = dg.Cylinders.QuadPart * dg.SectorsPerTrack * dg.TracksPerCylinder * dg.BytesPerSector;
 		Extension->HostBytesPerSector = dg.BytesPerSector;
 
+		storagePropertyQuery.PropertyId = StorageAccessAlignmentProperty;
+		storagePropertyQuery.QueryType = PropertyStandardQuery;
+
+		/* IOCTL_STORAGE_QUERY_PROPERTY supported only on Vista and above */
+		if (NT_SUCCESS (TCSendHostDeviceIoControlRequestEx (DeviceObject, Extension, IOCTL_STORAGE_QUERY_PROPERTY, 
+			(char*) &storagePropertyQuery, sizeof(storagePropertyQuery), 
+			(char *) &storageDescriptor, sizeof (storageDescriptor))))
+		{
+			Extension->HostBytesPerPhysicalSector = storageDescriptor.BytesPerPhysicalSector;
+		}
+		else
+		{
+			Extension->HostBytesPerPhysicalSector = dg.BytesPerSector;
+		}
+
 		// Drive geometry is used only when IOCTL_DISK_GET_PARTITION_INFO fails
 		if (NT_SUCCESS (TCSendHostDeviceIoControlRequest (DeviceObject, Extension, IOCTL_DISK_GET_PARTITION_INFO_EX, (char *) &pix, sizeof (pix))))
 		{
@@ -144,6 +161,7 @@ NTSTATUS TCOpenVolume (PDEVICE_OBJECT DeviceObject,
 		}
 
 		Extension->HostBytesPerSector = mount->BytesPerSector;
+		Extension->HostBytesPerPhysicalSector = mount->BytesPerPhysicalSector;
 
 		if (Extension->HostBytesPerSector != TC_SECTOR_SIZE_FILE_HOSTED_VOLUME)
 			disableBuffering = FALSE;
@@ -746,9 +764,11 @@ void TCCloseVolume (PDEVICE_OBJECT DeviceObject, PEXTENSION Extension)
 }
 
 
-NTSTATUS TCSendHostDeviceIoControlRequest (PDEVICE_OBJECT DeviceObject,
+NTSTATUS TCSendHostDeviceIoControlRequestEx (PDEVICE_OBJECT DeviceObject,
 			       PEXTENSION Extension,
 			       ULONG IoControlCode,
+					 void *InputBuffer,
+					 ULONG InputBufferSize,
 			       void *OutputBuffer,
 			       ULONG OutputBufferSize)
 {
@@ -762,7 +782,7 @@ NTSTATUS TCSendHostDeviceIoControlRequest (PDEVICE_OBJECT DeviceObject,
 
 	Irp = IoBuildDeviceIoControlRequest (IoControlCode,
 					     Extension->pFsdDevice,
-					     NULL, 0,
+					     InputBuffer, InputBufferSize,
 					     OutputBuffer, OutputBufferSize,
 					     FALSE,
 					     &Extension->keVolumeEvent,
@@ -787,6 +807,15 @@ NTSTATUS TCSendHostDeviceIoControlRequest (PDEVICE_OBJECT DeviceObject,
 	return ntStatus;
 }
 
+NTSTATUS TCSendHostDeviceIoControlRequest (PDEVICE_OBJECT DeviceObject,
+			       PEXTENSION Extension,
+			       ULONG IoControlCode,
+			       void *OutputBuffer,
+			       ULONG OutputBufferSize)
+{
+	return TCSendHostDeviceIoControlRequestEx (DeviceObject, Extension, IoControlCode, NULL, 0, OutputBuffer, OutputBufferSize);
+}
+
 NTSTATUS COMPLETE_IRP (PDEVICE_OBJECT DeviceObject,
 	      PIRP Irp,
 	      NTSTATUS IrpStatus,

src/Driver/Ntvol.h

@@ -15,5 +15,6 @@ NTSTATUS TCOpenVolume ( PDEVICE_OBJECT DeviceObject , PEXTENSION Extension , MOU
 void TCCloseVolume ( PDEVICE_OBJECT DeviceObject , PEXTENSION Extension );
 NTSTATUS TCCompletion ( PDEVICE_OBJECT DeviceObject , PIRP Irp , PVOID pUserBuffer );
 static NTSTATUS TCSendHostDeviceIoControlRequest ( PDEVICE_OBJECT DeviceObject , PEXTENSION Extension , ULONG IoControlCode , void *OutputBuffer , ULONG OutputBufferSize );
+static NTSTATUS TCSendHostDeviceIoControlRequestEx ( PDEVICE_OBJECT DeviceObject , PEXTENSION Extension , ULONG IoControlCode , void *InputBuffer , ULONG InputBufferSize , void *OutputBuffer , ULONG OutputBufferSize );
 NTSTATUS COMPLETE_IRP ( PDEVICE_OBJECT DeviceObject , PIRP Irp , NTSTATUS IrpStatus , ULONG_PTR IrpInformation );
 static void RestoreTimeStamp ( PEXTENSION Extension );